Changed crypto

Merge branch 'master' into threading
Change description
2021-02-09 23:50:00 +01:00 · 2021-02-09 16:47:13 +01:00 · 2021-02-09 16:23:34 +01:00 · 2021-02-09 16:21:10 +01:00 · 2021-02-09 16:20:59 +01:00 · 2021-02-09 07:24:05 +00:00
49 changed files with 2460 additions and 2285 deletions
--- a/.rpm/vpncloud.spec
+++ b/.rpm/vpncloud.spec
@ -27,6 +27,7 @@ mkdir -p %{buildroot}/lib/systemd/system
 mkdir -p %{buildroot}/usr/share/man/man1
 cp %{buildroot}/../../../../../assets/example.net.disabled %{buildroot}/etc/vpncloud/example.net.disabled
 cp %{buildroot}/../../../../../assets/vpncloud@.service %{buildroot}/lib/systemd/system/vpncloud@.service
+cp %{buildroot}/../../../../../assets/vpncloud-wsproxy.service %{buildroot}/lib/systemd/system/vpncloud-wsproxy.service
 cp %{buildroot}/../../../../../target/vpncloud.1.gz %{buildroot}/usr/share/man/man1/vpncloud.1.gz
 cp -a * %{buildroot}

@ -38,6 +39,7 @@ rm -rf %{buildroot}
 /etc/vpncloud/example.net.disabled
 /usr/bin/vpncloud
 /lib/systemd/system/vpncloud@.service
+/lib/systemd/system/vpncloud-wsproxy.service
 /usr/share/man/man1/vpncloud.1.gz

 %defattr(-,root,root,-)
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@ -2,14 +2,16 @@

 This project follows [semantic versioning](http://semver.org).

-### UNRELEASED
+### v2.1.0 (2021-02-06)

- [added] Support for creating shell completions
+- [added] Support for websocket proxy mode
 - [added] Support for hook scripts to handle certain situations
+- [added] Support for creating shell completions
 - [removed] Removed dummy device type
 - [changed] Updated dependencies
 - [changed] Changed Rust version to 1.49.0
 - [fixed] Added missing peer address propagation
+- [fixed] Fixed problem with peer addresses without port

 ### v2.0.1 (2020-11-07)

--- a/Cargo.lock
+++ b/Cargo.lock
@ -44,12 +44,27 @@ version = "0.2.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a4521f3e3d031370679b3b140beb36dfe4801b09ac77e30c61941f97df3ef28b"

+[[package]]
+name = "base64"
+version = "0.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "904dfeac50f3cdaba28fc6f57fdcddb75f49ed61346676a78c4ffe55877802fd"
+
 [[package]]
 name = "bitflags"
 version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cf1de2fe8c75bc145a2f577add951f8134889b4795d47466a54a5c846d691693"

+[[package]]
+name = "block-buffer"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4152116fd6e9dadb291ae18fc1ec3575ed6d84c29642d97890f4b4a3417297e4"
+dependencies = [
+ "generic-array",
+]
+
 [[package]]
 name = "boxfnonce"
 version = "0.1.1"
@ -58,9 +73,9 @@ checksum = "5988cb1d626264ac94100be357308f29ff7cbdd3b36bda27f450a4ee3f713426"

 [[package]]
 name = "bstr"
-version = "0.2.14"
+version = "0.2.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "473fc6b38233f9af7baa94fb5852dca389e3d95b8e21c8e3719301462c5d9faf"
+checksum = "a40b47ad93e1a5404e6c18dec46b628214fee441c70f4ab5d6942142cc268a3d"
 dependencies = [
 "lazy_static",
 "memchr",
@ -70,9 +85,9 @@ dependencies = [

 [[package]]
 name = "bumpalo"
-version = "3.5.0"
+version = "3.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f07aa6688c702439a1be0307b6a94dffe1168569e45b9500c1372bc580740d59"
+checksum = "099e596ef14349721d9016f6b80dd3419ea1bf289ab9b44df8e4dfd3a005d5d9"

 [[package]]
 name = "byteorder"
@ -134,6 +149,12 @@ version = "0.4.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "28b9d6de7f49e22cf97ad17fc4036ece69300032f45f78f30b4a4482cdc3f4a6"

+[[package]]
+name = "cpuid-bool"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8aebca1129a03dc6dc2b127edd729435bbc4a37e1d5f4d7513165089ceb02634"
+
 [[package]]
 name = "criterion"
 version = "0.3.4"
@ -248,6 +269,15 @@ dependencies = [
 "libc",
 ]

+[[package]]
+name = "digest"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d3dd60d1080a57a05ab032377049e0591415d2b31afd7028356dbf3cc6dcb066"
+dependencies = [
+ "generic-array",
+]
+
 [[package]]
 name = "discard"
 version = "1.0.4"
@ -282,6 +312,16 @@ dependencies = [
 "percent-encoding",
 ]

+[[package]]
+name = "generic-array"
+version = "0.14.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "501466ecc8a30d1d3b7fc9229b122b2ce8ed6e9d9223f1138d4babb253e51817"
+dependencies = [
+ "typenum",
+ "version_check",
+]
+
 [[package]]
 name = "getrandom"
 version = "0.2.2"
@ -329,10 +369,22 @@ dependencies = [
 ]

 [[package]]
-name = "idna"
-version = "0.2.0"
+name = "httparse"
+version = "1.3.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "02e2673c30ee86b5b96a9cb52ad15718aa1f966f5ab9ad54a8b95d5ca33120a9"
+checksum = "615caabe2c3160b313d52ccc905335f4ed5f10881dd63dc5699d47e90be85691"
+
+[[package]]
+name = "iai"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "71a816c97c42258aa5834d07590b718b4c9a598944cd39a52dc25b351185d678"
+
+[[package]]
+name = "idna"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "de910d521f7cc3135c4de8db1cb910e0b5ed1dc6f57c381cd07e8e661ce10094"
 dependencies = [
 "matches",
 "unicode-bidi",
@ -352,6 +404,15 @@ dependencies = [
 "xmltree",
 ]

+[[package]]
+name = "input_buffer"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f97967975f448f1a7ddb12b0bc41069d09ed6a1c161a92687e057325db35d413"
+dependencies = [
+ "bytes",
+]
+
 [[package]]
 name = "instant"
 version = "0.1.9"
@ -402,9 +463,9 @@ checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"

 [[package]]
 name = "libc"
-version = "0.2.84"
+version = "0.2.86"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1cca32fa0182e8c0989459524dc356b8f2b5c10f1b9eb521b7d182c03cf8c5ff"
+checksum = "b7282d924be3275cec7f6756ff4121987bc6481325397dde6ba3e7802b1a8b1c"

 [[package]]
 name = "linked-hash-map"
@ -507,6 +568,12 @@ version = "11.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0ab1bc2a289d34bd04a330323ac98a1b4bc82c9d9fcb1e66b63caa84da26b575"

+[[package]]
+name = "opaque-debug"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "624a8340c38c1b80fd549087862da4ba43e08858af025b236e509b6649fc13d5"
+
 [[package]]
 name = "parking_lot"
 version = "0.11.1"
@ -745,9 +812,9 @@ dependencies = [

 [[package]]
 name = "ring"
-version = "0.16.19"
+version = "0.16.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "024a1e66fea74c66c66624ee5622a7ff0e4b73a13b4f5c326ddb50c708944226"
+checksum = "3053cf52e236a3ed746dfc745aa9cacf1b791d846bdaf412f60a8d7d6e17c8fc"
 dependencies = [
 "cc",
 "libc",
@ -835,9 +902,9 @@ dependencies = [

 [[package]]
 name = "serde_json"
-version = "1.0.61"
+version = "1.0.62"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4fceb2595057b6891a4ee808f70054bd2d12f0e97f1cbb78689b59f676df325a"
+checksum = "ea1c6153794552ea7cf7cf63b1231a25de00ec90db326ba6264440fa08e31486"
 dependencies = [
 "itoa",
 "ryu",
@ -846,9 +913,9 @@ dependencies = [

 [[package]]
 name = "serde_yaml"
-version = "0.8.15"
+version = "0.8.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "971be8f6e4d4a47163b405a3df70d14359186f9ab0f3a3ec37df144ca1ce089f"
+checksum = "bdd2af560da3c1fdc02cb80965289254fc35dff869810061e2d8290ee48848ae"
 dependencies = [
 "dtoa",
 "linked-hash-map",
@ -856,6 +923,19 @@ dependencies = [
 "yaml-rust",
 ]

+[[package]]
+name = "sha-1"
+version = "0.9.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f4b312c3731e3fe78a185e6b9b911a7aa715b8e31cce117975219aab2acf285d"
+dependencies = [
+ "block-buffer",
+ "cfg-if 1.0.0",
+ "cpuid-bool",
+ "digest",
+ "opaque-debug",
+]
+
 [[package]]
 name = "sha1"
 version = "0.6.0"
@ -886,9 +966,9 @@ checksum = "6e63cff320ae2c57904679ba7cb63280a3dc4613885beafb148ee7bf9aa9042d"

 [[package]]
 name = "standback"
-version = "0.2.14"
+version = "0.2.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c66a8cff4fa24853fdf6b51f75c6d7f8206d7c75cab4e467bcd7f25c2b1febe0"
+checksum = "a2beb4d1860a61f571530b3f855a1b538d0200f7871c63331ecd6f17b1f014f8"
 dependencies = [
 "version_check",
 ]
@ -1089,6 +1169,32 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cda74da7e1a664f795bb1f8a87ec406fb89a02522cf6e50620d016add6dbbf5c"

+[[package]]
+name = "tungstenite"
+version = "0.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5fe8dada8c1a3aeca77d6b51a4f1314e0f4b8e438b7b1b71e3ddaca8080e4093"
+dependencies = [
+ "base64",
+ "byteorder",
+ "bytes",
+ "http",
+ "httparse",
+ "input_buffer",
+ "log",
+ "rand",
+ "sha-1",
+ "thiserror",
+ "url",
+ "utf-8",
+]
+
+[[package]]
+name = "typenum"
+version = "1.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "373c8a200f9e67a0c95e62a4f52fbf80c23b4381c05a17845531982fa99e6b33"
+
 [[package]]
 name = "unicode-bidi"
 version = "0.3.4"
@ -1100,9 +1206,9 @@ dependencies = [

 [[package]]
 name = "unicode-normalization"
-version = "0.1.16"
+version = "0.1.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a13e63ab62dbe32aeee58d1c5408d35c36c392bba5d9d3142287219721afe606"
+checksum = "07fbfce1c8a97d547e8b5334978438d9d6ec8c20e38f56d4a4374d181493eaef"
 dependencies = [
 "tinyvec",
 ]
@ -1143,6 +1249,12 @@ dependencies = [
 "percent-encoding",
 ]

+[[package]]
+name = "utf-8"
+version = "0.7.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "05e42f7c18b8f902290b009cde6d651262f956c98bc51bca4cd1d511c9cd85c7"
+
 [[package]]
 name = "vec_map"
 version = "0.8.2"
@ -1163,12 +1275,13 @@ checksum = "6a02e4885ed3bc0f2de90ea6dd45ebcbb66dacffe03547fadbb0eeae2770887d"

 [[package]]
 name = "vpncloud"
-version = "2.0.1"
+version = "2.1.0"
 dependencies = [
 "byteorder",
 "criterion",
 "daemonize",
 "fnv",
+ "iai",
 "igd",
 "libc",
 "log",
@ -1184,6 +1297,8 @@ dependencies = [
 "tempfile",
 "thiserror",
 "time",
+ "tungstenite",
+ "url",
 "yaml-rust",
 ]

--- a/Cargo.toml
+++ b/Cargo.toml
@ -1,6 +1,6 @@
 [package]
 name = "vpncloud"
-version = "2.0.1"
+version = "2.1.0"
 authors = ["Dennis Schwerdel <schwerdel@googlemail.com>"]
 build = "build.rs"
 license = "GPL-3.0"
@ -30,18 +30,25 @@ byteorder = "1.4"
 thiserror = "1.0"
 parking_lot = "*"
 smallvec = "1.6"
+tungstenite = { version = "0.13", optional = true, default-features = false }
+url = { version = "2.2", optional = true }

 [dev-dependencies]
 tempfile = "3"
-criterion = "0.3"
+criterion = { version = "0.3", features = ["html_reports"] }
+iai = "0.1"

 [features]
-default = ["nat"]
-bench = []
+default = ["nat", "websocket"]
 nat = ["igd"]
+websocket = ["tungstenite", "url"]

 [[bench]]
-name = "bench"
+name = "criterion"
+harness = false
+
+[[bench]]
+name = "valgrind"
 harness = false

 [profile.release]
@ -55,10 +62,12 @@ lto = false

 [package.metadata.deb]
 extended-description = """\
- VpnCloud is a simple VPN over UDP. It creates a virtual network interface on
- the host and forwards all received data via UDP to the destination. VpnCloud
- establishes a fully-meshed VPN network in a peer-to-peer manner. It can work
- on TUN devices (IP based) and TAP devices (Ethernet based)."""
+ VpnCloud is a high performance peer-to-peer mesh VPN over UDP supporting strong encryption, 
+ NAT traversal and a simple configuration. It establishes a fully-meshed self-healing VPN
+ network in a peer-to-peer manner with strong end-to-end encryption based on elliptic curve
+ keys and AES-256. VpnCloud creates a virtual network interface on the host and forwards all
+ received data via UDP to the destination. It can work on TUN devices (IP based) and TAP 
+ devices (Ethernet based)."""
 license-file = ["LICENSE.md", "1"]
 changelog = "assets/changelog.txt"
 section = "net"
@ -68,6 +77,7 @@ assets = [
  ["target/release/vpncloud", "/usr/bin/vpncloud", "755"],
  ["assets/example.net.disabled", "/etc/vpncloud/example.net.disabled", "600"],
  ["assets/vpncloud@.service", "/lib/systemd/system/vpncloud@.service", "644"],
+  ["assets/vpncloud-wsproxy.service", "/lib/systemd/system/vpncloud-wsproxy.service", "644"],
  ["target/vpncloud.1.gz", "/usr/share/man/man1/vpncloud.1.gz", "644"]
 ]

--- a/LICENSE.md
+++ b/LICENSE.md
@ -1,7 +1,7 @@
 # License: GPL-3

 VpnCloud - Peer-to-Peer VPN
-Copyright (C) 2015-2020  Dennis Schwerdel
+Copyright (C) 2015-2021  Dennis Schwerdel

 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@ -15,22 +15,19 @@ GNU General Public License for more details.

 Full license text follows.

-
-
-
-                            Preamble
+### Preamble

 The GNU General Public License is a free, copyleft license for
 software and other kinds of works.

 The licenses for most software and other practical works are designed
 to take away your freedom to share and change the works. By contrast,
-the GNU General Public License is intended to guarantee your freedom to
-share and change all versions of a program--to make sure it remains free
-software for all its users.  We, the Free Software Foundation, use the
-GNU General Public License for most of our software; it applies also to
-any other work released this way by its authors.  You can apply it to
-your programs, too.
+the GNU General Public License is intended to guarantee your freedom
+to share and change all versions of a program--to make sure it remains
+free software for all its users. We, the Free Software Foundation, use
+the GNU General Public License for most of our software; it applies
+also to any other work released this way by its authors. You can apply
+it to your programs, too.

 When we speak of free software, we are referring to freedom, not
 price. Our General Public Licenses are designed to make sure that you
@ -40,9 +37,10 @@ want it, that you can change the software or use pieces of it in new
 free programs, and that you know you can do these things.

 To protect your rights, we need to prevent others from denying you
-these rights or asking you to surrender the rights.  Therefore, you have
-certain responsibilities if you distribute copies of the software, or if
-you modify it: responsibilities to respect the freedom of others.
+these rights or asking you to surrender the rights. Therefore, you
+have certain responsibilities if you distribute copies of the
+software, or if you modify it: responsibilities to respect the freedom
+of others.

 For example, if you distribute copies of such a program, whether
 gratis or for a fee, you must pass on to the recipients the same
@ -61,43 +59,44 @@ changed, so that their problems will not be attributed erroneously to
 authors of previous versions.

 Some devices are designed to deny users access to install or run
-modified versions of the software inside them, although the manufacturer
-can do so.  This is fundamentally incompatible with the aim of
-protecting users' freedom to change the software.  The systematic
-pattern of such abuse occurs in the area of products for individuals to
-use, which is precisely where it is most unacceptable.  Therefore, we
-have designed this version of the GPL to prohibit the practice for those
-products.  If such problems arise substantially in other domains, we
-stand ready to extend this provision to those domains in future versions
-of the GPL, as needed to protect the freedom of users.
+modified versions of the software inside them, although the
+manufacturer can do so. This is fundamentally incompatible with the
+aim of protecting users' freedom to change the software. The
+systematic pattern of such abuse occurs in the area of products for
+individuals to use, which is precisely where it is most unacceptable.
+Therefore, we have designed this version of the GPL to prohibit the
+practice for those products. If such problems arise substantially in
+other domains, we stand ready to extend this provision to those
+domains in future versions of the GPL, as needed to protect the
+freedom of users.

 Finally, every program is threatened constantly by software patents.
 States should not allow patents to restrict development and use of
-software on general-purpose computers, but in those that do, we wish to
-avoid the special danger that patents applied to a free program could
-make it effectively proprietary.  To prevent this, the GPL assures that
-patents cannot be used to render the program non-free.
+software on general-purpose computers, but in those that do, we wish
+to avoid the special danger that patents applied to a free program
+could make it effectively proprietary. To prevent this, the GPL
+assures that patents cannot be used to render the program non-free.

 The precise terms and conditions for copying, distribution and
 modification follow.

-                       TERMS AND CONDITIONS
+### TERMS AND CONDITIONS

-  0. Definitions.
+#### 0. Definitions.

 "This License" refers to version 3 of the GNU General Public License.

-  "Copyright" also means copyright-like laws that apply to other kinds of
-works, such as semiconductor masks.
+"Copyright" also means copyright-like laws that apply to other kinds
+of works, such as semiconductor masks.

 "The Program" refers to any copyrightable work licensed under this
 License. Each licensee is addressed as "you". "Licensees" and
 "recipients" may be individuals or organizations.

 To "modify" a work means to copy from or adapt all or part of the work
-in a fashion requiring copyright permission, other than the making of an
-exact copy.  The resulting work is called a "modified version" of the
-earlier work or a work "based on" the earlier work.
+in a fashion requiring copyright permission, other than the making of
+an exact copy. The resulting work is called a "modified version" of
+the earlier work or a work "based on" the earlier work.

 A "covered work" means either the unmodified Program or a work based
 on the Program.
@ -110,11 +109,12 @@ distribution (with or without modification), making available to the
 public, and in some countries other activities as well.

 To "convey" a work means any kind of propagation that enables other
-parties to make or receive copies.  Mere interaction with a user through
-a computer network, with no transfer of a copy, is not conveying.
+parties to make or receive copies. Mere interaction with a user
+through a computer network, with no transfer of a copy, is not
+conveying.

-  An interactive user interface displays "Appropriate Legal Notices"
-to the extent that it includes a convenient and prominently visible
+An interactive user interface displays "Appropriate Legal Notices" to
+the extent that it includes a convenient and prominently visible
 feature that (1) displays an appropriate copyright notice, and (2)
 tells the user that there is no warranty for the work (except to the
 extent that warranties are provided), that licensees may convey the
@ -122,11 +122,11 @@ work under this License, and how to view a copy of this License.  If
 the interface presents a list of user commands or options, such as a
 menu, a prominent item in the list meets this criterion.

-  1. Source Code.
+#### 1. Source Code.

-  The "source code" for a work means the preferred form of the work
-for making modifications to it.  "Object code" means any non-source
-form of a work.
+The "source code" for a work means the preferred form of the work for
+making modifications to it. "Object code" means any non-source form of
+a work.

 A "Standard Interface" means an interface that either is an official
 standard defined by a recognized standards body, or, in the case of
@ -157,14 +157,13 @@ linked subprograms that the work is specifically designed to require,
 such as by intimate data communication or control flow between those
 subprograms and other parts of the work.

-  The Corresponding Source need not include anything that users
-can regenerate automatically from other parts of the Corresponding
-Source.
+The Corresponding Source need not include anything that users can
+regenerate automatically from other parts of the Corresponding Source.

-  The Corresponding Source for a work in source code form is that
-same work.
+The Corresponding Source for a work in source code form is that same
+work.

-  2. Basic Permissions.
+#### 2. Basic Permissions.

 All rights granted under this License are granted for the term of
 copyright on the Program, and are irrevocable provided the stated
@ -174,22 +173,22 @@ covered work is covered by this License only if the output, given its
 content, constitutes a covered work. This License acknowledges your
 rights of fair use or other equivalent, as provided by copyright law.

-  You may make, run and propagate covered works that you do not
-convey, without conditions so long as your license otherwise remains
-in force.  You may convey covered works to others for the sole purpose
-of having them make modifications exclusively for you, or provide you
-with facilities for running those works, provided that you comply with
-the terms of this License in conveying all material for which you do
-not control copyright.  Those thus making or running the covered works
-for you must do so exclusively on your behalf, under your direction
-and control, on terms that prohibit them from making any copies of
-your copyrighted material outside their relationship with you.
+You may make, run and propagate covered works that you do not convey,
+without conditions so long as your license otherwise remains in force.
+You may convey covered works to others for the sole purpose of having
+them make modifications exclusively for you, or provide you with
+facilities for running those works, provided that you comply with the
+terms of this License in conveying all material for which you do not
+control copyright. Those thus making or running the covered works for
+you must do so exclusively on your behalf, under your direction and
+control, on terms that prohibit them from making any copies of your
+copyrighted material outside their relationship with you.

-  Conveying under any other circumstances is permitted solely under
-the conditions stated below.  Sublicensing is not allowed; section 10
-makes it unnecessary.
+Conveying under any other circumstances is permitted solely under the
+conditions stated below. Sublicensing is not allowed; section 10 makes
+it unnecessary.

-  3. Protecting Users' Legal Rights From Anti-Circumvention Law.
+#### 3. Protecting Users' Legal Rights From Anti-Circumvention Law.

 No covered work shall be deemed part of an effective technological
 measure under any applicable law fulfilling obligations under article
@ -198,14 +197,14 @@ similar laws prohibiting or restricting circumvention of such
 measures.

 When you convey a covered work, you waive any legal power to forbid
-circumvention of technological measures to the extent such circumvention
-is effected by exercising rights under this License with respect to
-the covered work, and you disclaim any intention to limit operation or
-modification of the work as a means of enforcing, against the work's
-users, your or third parties' legal rights to forbid circumvention of
-technological measures.
+circumvention of technological measures to the extent such
+circumvention is effected by exercising rights under this License with
+respect to the covered work, and you disclaim any intention to limit
+operation or modification of the work as a means of enforcing, against
+the work's users, your or third parties' legal rights to forbid
+circumvention of technological measures.

-  4. Conveying Verbatim Copies.
+#### 4. Conveying Verbatim Copies.

 You may convey verbatim copies of the Program's source code as you
 receive it, in any medium, provided that you conspicuously and
@ -218,29 +217,27 @@ recipients a copy of this License along with the Program.
 You may charge any price or no price for each copy that you convey,
 and you may offer support or warranty protection for a fee.

-  5. Conveying Modified Source Versions.
+#### 5. Conveying Modified Source Versions.

 You may convey a work based on the Program, or the modifications to
 produce it from the Program, in the form of source code under the
-terms of section 4, provided that you also meet all of these conditions:
+terms of section 4, provided that you also meet all of these
+conditions:

-    a) The work must carry prominent notices stating that you modified
+-   a) The work must carry prominent notices stating that you modified
    it, and giving a relevant date.
-
-    b) The work must carry prominent notices stating that it is
-    released under this License and any conditions added under section
-    7.  This requirement modifies the requirement in section 4 to
-    "keep intact all notices".
-
-    c) You must license the entire work, as a whole, under this
+-   b) The work must carry prominent notices stating that it is
+    released under this License and any conditions added under
+    section 7. This requirement modifies the requirement in section 4
+    to "keep intact all notices".
+-   c) You must license the entire work, as a whole, under this
    License to anyone who comes into possession of a copy. This
    License will therefore apply, along with any applicable section 7
    additional terms, to the whole of the work, and all its parts,
    regardless of how they are packaged. This License gives no
    permission to license the work in any other way, but it does not
    invalidate such permission if you have separately received it.
-
-    d) If the work has interactive user interfaces, each must display
+-   d) If the work has interactive user interfaces, each must display
    Appropriate Legal Notices; however, if the Program has interactive
    interfaces that do not display Appropriate Legal Notices, your
    work need not make them do so.
@ -255,19 +252,18 @@ beyond what the individual works permit.  Inclusion of a covered work
 in an aggregate does not cause this License to apply to the other
 parts of the aggregate.

-  6. Conveying Non-Source Forms.
+#### 6. Conveying Non-Source Forms.

-  You may convey a covered work in object code form under the terms
-of sections 4 and 5, provided that you also convey the
-machine-readable Corresponding Source under the terms of this License,
-in one of these ways:
+You may convey a covered work in object code form under the terms of
+sections 4 and 5, provided that you also convey the machine-readable
+Corresponding Source under the terms of this License, in one of these
+ways:

-    a) Convey the object code in, or embodied in, a physical product
+-   a) Convey the object code in, or embodied in, a physical product
    (including a physical distribution medium), accompanied by the
    Corresponding Source fixed on a durable physical medium
    customarily used for software interchange.
-
-    b) Convey the object code in, or embodied in, a physical product
+-   b) Convey the object code in, or embodied in, a physical product
    (including a physical distribution medium), accompanied by a
    written offer, valid for at least three years and valid for as
    long as you offer spare parts or customer support for that product
@ -276,16 +272,14 @@ in one of these ways:
    product that is covered by this License, on a durable physical
    medium customarily used for software interchange, for a price no
    more than your reasonable cost of physically performing this
-    conveying of source, or (2) access to copy the
-    Corresponding Source from a network server at no charge.
-
-    c) Convey individual copies of the object code with a copy of the
+    conveying of source, or (2) access to copy the Corresponding
+    Source from a network server at no charge.
+-   c) Convey individual copies of the object code with a copy of the
    written offer to provide the Corresponding Source. This
    alternative is allowed only occasionally and noncommercially, and
    only if you received the object code with such an offer, in accord
    with subsection 6b.
-
-    d) Convey the object code by offering access from a designated
+-   d) Convey the object code by offering access from a designated
    place (gratis or for a charge), and offer equivalent access to the
    Corresponding Source in the same way through the same place at no
    further charge. You need not require recipients to copy the
@ -297,36 +291,36 @@ in one of these ways:
    Corresponding Source. Regardless of what server hosts the
    Corresponding Source, you remain obligated to ensure that it is
    available for as long as needed to satisfy these requirements.
-
-    e) Convey the object code using peer-to-peer transmission, provided
-    you inform other peers where the object code and Corresponding
-    Source of the work are being offered to the general public at no
-    charge under subsection 6d.
+-   e) Convey the object code using peer-to-peer transmission,
+    provided you inform other peers where the object code and
+    Corresponding Source of the work are being offered to the general
+    public at no charge under subsection 6d.

 A separable portion of the object code, whose source code is excluded
 from the Corresponding Source as a System Library, need not be
 included in conveying the object code work.

 A "User Product" is either (1) a "consumer product", which means any
-tangible personal property which is normally used for personal, family,
-or household purposes, or (2) anything designed or sold for incorporation
-into a dwelling.  In determining whether a product is a consumer product,
-doubtful cases shall be resolved in favor of coverage.  For a particular
-product received by a particular user, "normally used" refers to a
-typical or common use of that class of product, regardless of the status
-of the particular user or of the way in which the particular user
-actually uses, or expects or is expected to use, the product.  A product
-is a consumer product regardless of whether the product has substantial
-commercial, industrial or non-consumer uses, unless such uses represent
-the only significant mode of use of the product.
+tangible personal property which is normally used for personal,
+family, or household purposes, or (2) anything designed or sold for
+incorporation into a dwelling. In determining whether a product is a
+consumer product, doubtful cases shall be resolved in favor of
+coverage. For a particular product received by a particular user,
+"normally used" refers to a typical or common use of that class of
+product, regardless of the status of the particular user or of the way
+in which the particular user actually uses, or expects or is expected
+to use, the product. A product is a consumer product regardless of
+whether the product has substantial commercial, industrial or
+non-consumer uses, unless such uses represent the only significant
+mode of use of the product.

 "Installation Information" for a User Product means any methods,
-procedures, authorization keys, or other information required to install
-and execute modified versions of a covered work in that User Product from
-a modified version of its Corresponding Source.  The information must
-suffice to ensure that the continued functioning of the modified object
-code is in no case prevented or interfered with solely because
-modification has been made.
+procedures, authorization keys, or other information required to
+install and execute modified versions of a covered work in that User
+Product from a modified version of its Corresponding Source. The
+information must suffice to ensure that the continued functioning of
+the modified object code is in no case prevented or interfered with
+solely because modification has been made.

 If you convey an object code work under this section in, or with, or
 specifically for use in, a User Product, and the conveying occurs as
@ -340,12 +334,13 @@ modified object code on the User Product (for example, the work has
 been installed in ROM).

 The requirement to provide Installation Information does not include a
-requirement to continue to provide support service, warranty, or updates
-for a work that has been modified or installed by the recipient, or for
-the User Product in which it has been modified or installed.  Access to a
-network may be denied when the modification itself materially and
-adversely affects the operation of the network or violates the rules and
-protocols for communication across the network.
+requirement to continue to provide support service, warranty, or
+updates for a work that has been modified or installed by the
+recipient, or for the User Product in which it has been modified or
+installed. Access to a network may be denied when the modification
+itself materially and adversely affects the operation of the network
+or violates the rules and protocols for communication across the
+network.

 Corresponding Source conveyed, and Installation Information provided,
 in accord with this section must be in a format that is publicly
@ -353,7 +348,7 @@ documented (and with an implementation available to the public in
 source code form), and must require no special password or key for
 unpacking, reading or copying.

-  7. Additional Terms.
+#### 7. Additional Terms.

 "Additional permissions" are terms that supplement the terms of this
 License by making exceptions from one or more of its conditions.
@ -372,31 +367,26 @@ additional permissions on material, added by you to a covered work,
 for which you have or can give appropriate copyright permission.

 Notwithstanding any other provision of this License, for material you
-add to a covered work, you may (if authorized by the copyright holders of
-that material) supplement the terms of this License with terms:
+add to a covered work, you may (if authorized by the copyright holders
+of that material) supplement the terms of this License with terms:

-    a) Disclaiming warranty or limiting liability differently from the
+-   a) Disclaiming warranty or limiting liability differently from the
    terms of sections 15 and 16 of this License; or
-
-    b) Requiring preservation of specified reasonable legal notices or
+-   b) Requiring preservation of specified reasonable legal notices or
    author attributions in that material or in the Appropriate Legal
    Notices displayed by works containing it; or
-
-    c) Prohibiting misrepresentation of the origin of that material, or
-    requiring that modified versions of such material be marked in
+-   c) Prohibiting misrepresentation of the origin of that material,
+    or requiring that modified versions of such material be marked in
    reasonable ways as different from the original version; or
-
-    d) Limiting the use for publicity purposes of names of licensors or
-    authors of the material; or
-
-    e) Declining to grant rights under trademark law for use of some
+-   d) Limiting the use for publicity purposes of names of licensors
+    or authors of the material; or
+-   e) Declining to grant rights under trademark law for use of some
    trade names, trademarks, or service marks; or
-
-    f) Requiring indemnification of licensors and authors of that
-    material by anyone who conveys the material (or modified versions of
-    it) with contractual assumptions of liability to the recipient, for
-    any liability that these contractual assumptions directly impose on
-    those licensors and authors.
+-   f) Requiring indemnification of licensors and authors of that
+    material by anyone who conveys the material (or modified versions
+    of it) with contractual assumptions of liability to the recipient,
+    for any liability that these contractual assumptions directly
+    impose on those licensors and authors.

 All other non-permissive additional terms are considered "further
 restrictions" within the meaning of section 10. If the Program as you
@ -414,10 +404,10 @@ additional terms that apply to those files, or a notice indicating
 where to find the applicable terms.

 Additional terms, permissive or non-permissive, may be stated in the
-form of a separately written license, or stated as exceptions;
-the above requirements apply either way.
+form of a separately written license, or stated as exceptions; the
+above requirements apply either way.

-  8. Termination.
+#### 8. Termination.

 You may not propagate or modify a covered work except as expressly
 provided under this License. Any attempt otherwise to propagate or
@ -425,12 +415,12 @@ modify it is void, and will automatically terminate your rights under
 this License (including any patent licenses granted under the third
 paragraph of section 11).

-  However, if you cease all violation of this License, then your
-license from a particular copyright holder is reinstated (a)
-provisionally, unless and until the copyright holder explicitly and
-finally terminates your license, and (b) permanently, if the copyright
-holder fails to notify you of the violation by some reasonable means
-prior to 60 days after the cessation.
+However, if you cease all violation of this License, then your license
+from a particular copyright holder is reinstated (a) provisionally,
+unless and until the copyright holder explicitly and finally
+terminates your license, and (b) permanently, if the copyright holder
+fails to notify you of the violation by some reasonable means prior to
+60 days after the cessation.

 Moreover, your license from a particular copyright holder is
 reinstated permanently if the copyright holder notifies you of the
@ -445,10 +435,10 @@ this License.  If your rights have been terminated and not permanently
 reinstated, you do not qualify to receive new licenses for the same
 material under section 10.

-  9. Acceptance Not Required for Having Copies.
+#### 9. Acceptance Not Required for Having Copies.

-  You are not required to accept this License in order to receive or
-run a copy of the Program.  Ancillary propagation of a covered work
+You are not required to accept this License in order to receive or run
+a copy of the Program. Ancillary propagation of a covered work
 occurring solely as a consequence of using peer-to-peer transmission
 to receive a copy likewise does not require acceptance. However,
 nothing other than this License grants you permission to propagate or
@ -456,7 +446,7 @@ modify any covered work.  These actions infringe copyright if you do
 not accept this License. Therefore, by modifying or propagating a
 covered work, you indicate your acceptance of this License to do so.

-  10. Automatic Licensing of Downstream Recipients.
+#### 10. Automatic Licensing of Downstream Recipients.

 Each time you convey a covered work, the recipient automatically
 receives a license from the original licensors, to run, modify and
@ -481,14 +471,14 @@ rights granted under this License, and you may not initiate litigation
 any patent claim is infringed by making, using, selling, offering for
 sale, or importing the Program or any portion of it.

-  11. Patents.
+#### 11. Patents.

 A "contributor" is a copyright holder who authorizes use under this
 License of the Program or a work on which the Program is based. The
 work thus licensed is called the contributor's "contributor version".

-  A contributor's "essential patent claims" are all patent claims
-owned or controlled by the contributor, whether already acquired or
+A contributor's "essential patent claims" are all patent claims owned
+or controlled by the contributor, whether already acquired or
 hereafter acquired, that would be infringed by some manner, permitted
 by this License, of making, using, or selling its contributor version,
 but do not include claims that would be infringed only as a
@ -531,38 +521,39 @@ or convey a specific copy of the covered work, then the patent license
 you grant is automatically extended to all recipients of the covered
 work and works based on it.

-  A patent license is "discriminatory" if it does not include within
-the scope of its coverage, prohibits the exercise of, or is
-conditioned on the non-exercise of one or more of the rights that are
-specifically granted under this License.  You may not convey a covered
-work if you are a party to an arrangement with a third party that is
-in the business of distributing software, under which you make payment
-to the third party based on the extent of your activity of conveying
-the work, and under which the third party grants, to any of the
-parties who would receive the covered work from you, a discriminatory
-patent license (a) in connection with copies of the covered work
-conveyed by you (or copies made from those copies), or (b) primarily
-for and in connection with specific products or compilations that
-contain the covered work, unless you entered into that arrangement,
-or that patent license was granted, prior to 28 March 2007.
+A patent license is "discriminatory" if it does not include within the
+scope of its coverage, prohibits the exercise of, or is conditioned on
+the non-exercise of one or more of the rights that are specifically
+granted under this License. You may not convey a covered work if you
+are a party to an arrangement with a third party that is in the
+business of distributing software, under which you make payment to the
+third party based on the extent of your activity of conveying the
+work, and under which the third party grants, to any of the parties
+who would receive the covered work from you, a discriminatory patent
+license (a) in connection with copies of the covered work conveyed by
+you (or copies made from those copies), or (b) primarily for and in
+connection with specific products or compilations that contain the
+covered work, unless you entered into that arrangement, or that patent
+license was granted, prior to 28 March 2007.

 Nothing in this License shall be construed as excluding or limiting
 any implied license or other defenses to infringement that may
 otherwise be available to you under applicable patent law.

-  12. No Surrender of Others' Freedom.
+#### 12. No Surrender of Others' Freedom.

 If conditions are imposed on you (whether by court order, agreement or
 otherwise) that contradict the conditions of this License, they do not
 excuse you from the conditions of this License. If you cannot convey a
-covered work so as to satisfy simultaneously your obligations under this
-License and any other pertinent obligations, then as a consequence you may
-not convey it at all.  For example, if you agree to terms that obligate you
-to collect a royalty for further conveying from those to whom you convey
-the Program, the only way you could satisfy both those terms and this
-License would be to refrain entirely from conveying the Program.
+covered work so as to satisfy simultaneously your obligations under
+this License and any other pertinent obligations, then as a
+consequence you may not convey it at all. For example, if you agree to
+terms that obligate you to collect a royalty for further conveying
+from those to whom you convey the Program, the only way you could
+satisfy both those terms and this License would be to refrain entirely
+from conveying the Program.

-  13. Use with the GNU Affero General Public License.
+#### 13. Use with the GNU Affero General Public License.

 Notwithstanding any other provision of this License, you have
 permission to link or combine any covered work with a work licensed
@ -573,56 +564,57 @@ but the special requirements of the GNU Affero General Public License,
 section 13, concerning interaction through a network will apply to the
 combination as such.

-  14. Revised Versions of this License.
+#### 14. Revised Versions of this License.

-  The Free Software Foundation may publish revised and/or new versions of
-the GNU General Public License from time to time.  Such new versions will
-be similar in spirit to the present version, but may differ in detail to
-address new problems or concerns.
+The Free Software Foundation may publish revised and/or new versions
+of the GNU General Public License from time to time. Such new versions
+will be similar in spirit to the present version, but may differ in
+detail to address new problems or concerns.

-  Each version is given a distinguishing version number.  If the
-Program specifies that a certain numbered version of the GNU General
-Public License "or any later version" applies to it, you have the
-option of following the terms and conditions either of that numbered
-version or of any later version published by the Free Software
-Foundation.  If the Program does not specify a version number of the
-GNU General Public License, you may choose any version ever published
-by the Free Software Foundation.
+Each version is given a distinguishing version number. If the Program
+specifies that a certain numbered version of the GNU General Public
+License "or any later version" applies to it, you have the option of
+following the terms and conditions either of that numbered version or
+of any later version published by the Free Software Foundation. If the
+Program does not specify a version number of the GNU General Public
+License, you may choose any version ever published by the Free
+Software Foundation.

-  If the Program specifies that a proxy can decide which future
-versions of the GNU General Public License can be used, that proxy's
-public statement of acceptance of a version permanently authorizes you
-to choose that version for the Program.
+If the Program specifies that a proxy can decide which future versions
+of the GNU General Public License can be used, that proxy's public
+statement of acceptance of a version permanently authorizes you to
+choose that version for the Program.

 Later license versions may give you additional or different
 permissions. However, no additional obligations are imposed on any
 author or copyright holder as a result of your choosing to follow a
 later version.

-  15. Disclaimer of Warranty.
+#### 15. Disclaimer of Warranty.

 THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
 APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
-HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
-OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
-THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
-IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
-ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT
+WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND
+PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE
+DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR
+CORRECTION.

-  16. Limitation of Liability.
+#### 16. Limitation of Liability.

 IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
-WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
-THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
-GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
-USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
-DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
-PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
-EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
-SUCH DAMAGES.
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR
+CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES
+ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT
+NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR
+LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM
+TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER
+PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

-  17. Interpretation of Sections 15 and 16.
+#### 17. Interpretation of Sections 15 and 16.

 If the disclaimer of warranty and limitation of liability provided
 above cannot be given local legal effect according to their terms,
@ -633,16 +625,17 @@ copy of the Program in return for a fee.

 END OF TERMS AND CONDITIONS

-            How to Apply These Terms to Your New Programs
+### How to Apply These Terms to Your New Programs

 If you develop a new program, and you want it to be of the greatest
 possible use to the public, the best way to achieve this is to make it
-free software which everyone can redistribute and change under these terms.
+free software which everyone can redistribute and change under these
+terms.

-  To do so, attach the following notices to the program.  It is safest
-to attach them to the start of each source file to most effectively
-state the exclusion of warranty; and each file should have at least
-the "copyright" line and a pointer to where the full notice is found.
+To do so, attach the following notices to the program. It is safest to
+attach them to the start of each source file to most effectively state
+the exclusion of warranty; and each file should have at least the
+"copyright" line and a pointer to where the full notice is found.

        <one line to give the program's name and a brief idea of what it does.>
        Copyright (C) <year>  <name of author>
@ -658,9 +651,10 @@ the "copyright" line and a pointer to where the full notice is found.
        GNU General Public License for more details.

        You should have received a copy of the GNU General Public License
-    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+        along with this program.  If not, see <https://www.gnu.org/licenses/>.

-Also add information on how to contact you by electronic and paper mail.
+Also add information on how to contact you by electronic and paper
+mail.

 If the program does terminal interaction, make it output a short
 notice like this when it starts in an interactive mode:
@ -670,18 +664,19 @@ notice like this when it starts in an interactive mode:
        This is free software, and you are welcome to redistribute it
        under certain conditions; type `show c' for details.

-The hypothetical commands `show w' and `show c' should show the appropriate
-parts of the General Public License.  Of course, your program's commands
-might be different; for a GUI interface, you would use an "about box".
+The hypothetical commands \`show w' and \`show c' should show the
+appropriate parts of the General Public License. Of course, your
+program's commands might be different; for a GUI interface, you would
+use an "about box".

-  You should also get your employer (if you work as a programmer) or school,
-if any, to sign a "copyright disclaimer" for the program, if necessary.
-For more information on this, and how to apply and follow the GNU GPL, see
-<http://www.gnu.org/licenses/>.
+You should also get your employer (if you work as a programmer) or
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary. For more information on this, and how to apply and follow
+the GNU GPL, see <https://www.gnu.org/licenses/>.

-  The GNU General Public License does not permit incorporating your program
-into proprietary programs.  If your program is a subroutine library, you
-may consider it more useful to permit linking proprietary applications with
-the library.  If this is what you want to do, use the GNU Lesser General
-Public License instead of this License.  But first, please read
-<http://www.gnu.org/philosophy/why-not-lgpl.html>.
+The GNU General Public License does not permit incorporating your
+program into proprietary programs. If your program is a subroutine
+library, you may consider it more useful to permit linking proprietary
+applications with the library. If this is what you want to do, use the
+GNU Lesser General Public License instead of this License. But first,
+please read <https://www.gnu.org/licenses/why-not-lgpl.html>.
--- a/README.md
+++ b/README.md
@ -35,6 +35,7 @@ somewhat stable state. VpnCloud features the following functionality:
 * Support for different forwarding/routing behaviors (Hub, Switch, Router)
 * NAT and firewall traversal using hole punching
 * Automatic port forwarding via UPnP
+* Websocket proxy mode for restrictive environments
 * Support for tunneled VLans (TAP devices)
 * Support for publishing [beacons](https://vpncloud.ddswd.de/docs/beacons) to help nodes find each others
 * Support for statsd monitoring
@ -61,6 +62,9 @@ contributions are very welcome:

 * **Linux packages**: VpnCloud is stable enough to be packaged for Linux
  distributions. Maintainers who want to package VpnCloud are very welcome.
+* **Help with other platforms**: If you are a Rust developer with experience
+  on Windows or MacOS your help on porting VpnCloud to those platforms is very
+  welcome.
 * **Security review**: The security has been implemented with strong security
  primitives but it would be great if a cryptography expert could verify the
  system.
--- a/assets/changelog.txt
+++ b/assets/changelog.txt
@ -1,3 +1,16 @@
+vpncloud (2.1.0) stable; urgency=medium
+
+  * [added] Support for websocket proxy mode
+  * [added] Support for hook scripts to handle certain situations
+  * [added] Support for creating shell completions
+  * [removed] Removed dummy device type
+  * [changed] Updated dependencies
+  * [changed] Changed Rust version to 1.49.0
+  * [fixed] Added missing peer address propagation
+  * [fixed] Fixed problem with peer addresses without port
+
+ -- Dennis Schwerdel <schwerdel@googlemail.com>  Sat, 06 Feb 2020 13:13:00 +0100
+
 vpncloud (2.0.1) stable; urgency=medium

  * [changed] Changed documentation
--- a/assets/example.net.disabled
+++ b/assets/example.net.disabled
@ -1,140 +1,82 @@
 # This configuration file uses the YAML format.
-
-# This configuration can be enabled/disabled and controlled by adding the
-# network to `/etc/default/vpncloud` and starting/stopping it via
-# `/etc/init.d/vpncloud start/stop` on non-systemd systems and via
-# `systemctl enable/disable vpncloud@NAME` and
-# `service vpncloud@NAME start/stop` on systemd systems.
+# ~ means "no value" (i.e. "default value")
+# Replace it by a value and put quotes (") around values with special characters
+# List items start with a dash and a space (- )
+# Note that the whitespace before the settings names is important for the file structure


-# The port number or ip:port on which to listen for data.
-# Note: Every VPN needs a different port number.
-listen: 3210
+listen: 3210                # The port number or ip:port on which to listen for data.

-# Address of a peer to connect to. The address should be in the form
-# `addr:port`. If the node is not started, the connection will be retried
-# periodically. This parameter can be repeated to connect to multiple peers.
-# Note: Several entries can be separated by spaces.
-peers:
-#  - node2.example.com:3210
-#  - node3.example.com:3210
+peers:                      # Address of a peer to connect to. 
+                            # The address should be in the form `addr:port`.
+                            # Put [] for an empty list
+  - node2.example.com:3210
+  - node3.example.com:3210

-# Peer timeout in seconds. The peers will exchange information periodically
-# and drop peers that are silent for this period of time.
-peer-timeout: 300
+crypto:                     # Crypto settings
+  password: ~  # <-- CHANGE # A password to encrypt the VPN data.
+  private-key: ~            # Private key (alternative to password)
+  public-key: ~             # Public key (alternative to password)
+  trusted-keys: []          # Trusted keys (alternative to password)
+                            # Replace [] with list of keys

-# Switch table entry timeout in seconds. This parameter is only used in switch
-# mode. Addresses that have not been seen for the given period of time  will
-# be forgot.
-switch-timeout: 300
+ip: ~          # <-- CHANGE # An IP address to set on the device, e.g. 10.0.0.1
+                            # Must be different for every node on the VPN


-# Crypto settings
-#crypto:
+# ------------------ Advanced features ahead --------------------

-  # An optional password to encrypt the VPN data.
-  #password: ""
+auto-claim: true            # Whether to automatically claim the configured IP on tun devices

-  # Private key
-  #private-key: ""
-
-  # Public key
-  #public-key: ""
-
-  # Trusted keys
-  #trusted-keys:
-
-  # Supported algorithms. Subset of "aes128", "aes256", "chacha20", and 
-  # "plain" where "plain" means unencrypted.
-  #algorithms:
-
-
-# Device settings
-device:
-
-  # Name of the virtual device. Any `%d` will be filled with a free number.
-  name: "vpncloud%d"
-
-  # Set the type of network. There are two options: **tap** devices process
-  # Ethernet frames **tun** devices process IP packets. [default: `tun`]
-  type: tun
-
-  # The path of the /dev/net/tun device. Only change if you need to.
-  #path: /dev/net/tun
-
-  # Whether to fix detected rp-filter problems
-  fix-rp-filter: false
-
-
-# The mode of the VPN. The VPN can like a router, a switch or a hub. A **hub**
-# will send all data always to all peers. A **switch** will learn addresses
-# from incoming data and only send data to all peers when the address is
-# unknown. A **router** will send data according to known subnets of the
-# peers and ignore them otherwise. The **normal** mode is switch for tap
-# devices and router for tun devices. [default: `normal`]
-mode: normal
-
-
-# The local subnets to use. This parameter should be in the form
+claims:                     # The local subnets to use. This parameter should be in the form
                            # `address/prefixlen` where address is an IPv4 address, an IPv6 address, or a
                            # MAC address. The prefix length is the number of significant front bits that
-# distinguish the subnet from other subnets. Example: `10.1.1.0/24`.
-# Note: Several entries can be separated by spaces.
-#claims:
+                            # distinguish the subnet from other subnets.
 #  - 10.1.1.0/24

-# Whether to automatically claim the configured IP on tun devices
-auto-claim: true
+ifup: ~                     # Command to setup the interface. Use $IFNAME for interface name.
+ifdown: ~                   # Command to tear down the interface. Use $IFNAME for interface name.
+
+device:                     # Device settings
+  name: "vpncloud%d"        # Name of the virtual device. Any `%d` will be filled with a free number.
+  type: tun                 # Set the type of network. There are two options: **tap** devices process
+                            # Ethernet frames **tun** devices process IP packets. [default: `tun`]
+  path: "/dev/net/tun"      # Path of the tun device
+  fix-rp-filter: false      # Whether to fix detected rp-filter problems
+
+mode: normal                # Mode to run in, "normal", "hub", "switch", or "router" (see manpage)
+
+port-forwarding: true       # Try to map a port on the router
+
+switch-timeout: 300         # Switch timeout in seconds (switch mode only)
+
+peer-timeout: 300           # Peer timeout in seconds
+keepalive: ~                # Keepalive interval in seconds
+
+beacon:                     # Beacon settings
+  store: ~                  # File or command (prefix: "|") to use for storing beacons
+  load: ~                   # File or command (prefix: "|") to use for loading beacons  
+  interval: 3600            # How often to load and store beacons (in seconds)
+  password: ~               # Password to encrypt beacon data with
+
+statsd:                     # Statsd settings
+  server: ~                 # Statsd server name:port
+  prefix: ~                 # Prefix to use for stats keys
+
+pid-file: ~                 # Store the process id in this file when running in the background
+stats-file: ~               # Periodically write statistics on peers and current traffic to the given file
+
+hook: ~                     # Hook script to run for every event
+hooks: {}                   # Multiple hook scripts to run for specific events


-# An IP address to set on the device
-#ip: "" 

-# A command to setup the network interface. The command will be run (as
-# parameter to `sh -c`) when the device has been created to configure it.
-# The name of the allocated device will be available via the environment
-# variable `IFNAME`.
-#ifup: ""
-
-# A command to bring down the network interface. The command will be run (as
-# parameter to `sh -c`) to remove any configuration from the device.
-# The name of the allocated device will be available via the environment
-# variable `IFNAME`.
-#ifdown: ""
-
-# Store the process id in this file when running in the background. If set,
-# the given file will be created containing the process id of the new
-# background process. This option is only used when running in background.
-#pid_file: ""
-
-# Change the user and/or group of the process once all the setup has been
-# done and before spawning the background process. This option is only used
-# when running in background.
-#user: ""
-#group: ""
-
-
-# Beacon settings
-beacon:
-
-  # File or command (prefix: "|") to use for storing beacons
-  #store: ""
-
-  # File or command (prefix: "|") to use for loading beacons
-  #load: ""
-
-  # How often to load and store beacons (in seconds)
-  interval: 3600
-
-  # Password to encrypt beacon data with
-  #password: ""
-
-
-# Statsd settings
-#statsd:
-
-  # Statsd server name:port
-  #server: ""
-
-  # Prefix to use for stats keys
-  #prefix: "" 
+# Copy this template and save it to a file named /etc/vpncloud/MYNET.net (replace MYNET with your network name)
+#
+# On systems using systemd (most common):
+#    start/stop the network:            service vpncloud@MYNET start/stop
+#    enable/disable automatic startup:  systemctl enable/disable vpncloud@MYNET
+#
+# On older systems (using sysv init):
+#    Add the network name to /etc/default/vpncloud
+#    start/stop all VpnCloud networks:  /etc/init.d/vpncloud start/stop
--- a/assets/vpncloud-wsproxy.service
+++ b/assets/vpncloud-wsproxy.service
@ -0,0 +1,22 @@
+[Unit]
+Description=VpnCloud websocket proxy
+After=network-online.target
+Wants=network-online.target
+Documentation=man:vpncloud(1)
+
+[Service]
+Type=simple
+ExecStart=/usr/bin/vpncloud ws-proxy -l 3210
+RestartSec=5s
+Restart=on-failure
+TasksMax=10
+MemoryMax=50M
+PrivateTmp=yes
+ProtectHome=yes
+ProtectSystem=strict
+ReadWritePaths=/var/log /run
+CapabilityBoundingSet=CAP_NET_BIND_SERVICE CAP_SYS_CHROOT
+DeviceAllow=/dev/null rw
+
+[Install]
+WantedBy=multi-user.target
--- a/assets/vpncloud.1
+++ b/assets/vpncloud.1
@ -1,860 +0,0 @@
-'\" t
-.\"     Title: vpncloud
-.\"    Author: [see the "AUTHORS" section]
-.\" Generator: Asciidoctor 1.5.5
-.\"      Date: 2020-06-03
-.\"    Manual: \ \&
-.\"    Source: \ \&
-.\"  Language: English
-.\"
-.TH "VPNCLOUD" "1" "2020-06-03" "\ \&" "\ \&"
-.ie \n(.g .ds Aq \(aq
-.el       .ds Aq '
-.ss \n[.ss] 0
-.nh
-.ad l
-.de URL
-\\$2 \(laURL: \\$1 \(ra\\$3
-..
-.if \n[.g] .mso www.tmac
-.LINKSTYLE blue R < >
-.SH "NAME"
-vpncloud \- Peer\-to\-peer VPN
-.SH "SYNOPSIS"
-.sp
-\fBvpncloud [options] [\-\-config <file>] [\-t <type>] [\-d <name>] [\-l <addr>] [\-c <addr>...]\fP
-.SH "OPTIONS"
-.sp
-\fB\-\-config <file>\fP
-.RS 4
-Read configuration options from the specified file. Please see the section
-\fBCONFIG FILES\fP for documentation on the file format.
-If the same option is defined in the config file and as a parameter, the
-parameter overrides the config file.
-.RE
-.sp
-\fB\-t <type>\fP, \fB\-\-type <type>\fP
-.RS 4
-Set the type of network. There are two options: \fBtap\fP devices process
-Ethernet frames \fBtun\fP devices process IP packets. [default: \fBtap\fP]
-.RE
-.sp
-\fB\-d <name>\fP, \fB\-\-device <name>\fP
-.RS 4
-Name of the virtual device. Any \fB%d\fP will be filled with a free number.
-[default: \fBvpncloud%d\fP]
-.RE
-.sp
-\fB\-\-device\-path <path>\fP
-.RS 4
-The path of the base device inode, e.g. /dev/net/run.
-.RE
-.sp
-\fB\-m <mode>\fP, \fB\-\-mode <mode>\fP
-.RS 4
-The mode of the VPN. The VPN can like a router, a switch or a hub. A \fBhub\fP
-will send all data always to all peers. A \fBswitch\fP will learn addresses
-from incoming data and only send data to all peers when the address is
-unknown. A \fBrouter\fP will send data according to known subnets of the
-peers and ignore them otherwise. The \fBnormal\fP mode is switch for tap
-devices and router for tun devices. [default: \fBnormal\fP]
-.RE
-.sp
-\fB\-l <addr>\fP, \fB\-\-listen <addr>\fP
-.RS 4
-The address on which to listen for data. This can be simply a port number
-or a full address in form IP:PORT. If the IP is specified as \(aq\(rs*\(aq or only
-a port number is given, then the socket will listen on all IPs (v4 and v6),
-otherwise the socket will only listen on the given IP. [default: \fB3210\fP]
-.RE
-.sp
-\fB\-c <addr>\fP, \fB\-\-connect <addr>\fP
-.RS 4
-Address of a peer to connect to. The address should be in the form
-\fBaddr:port\fP. If the node is not started, the connection will be retried
-periodically. This parameter can be repeated to connect to multiple peers.
-.RE
-.sp
-\fB\-s <subnet>\fP, \fB\-\-subnet <subnet>\fP:
-  The local subnets to use. This parameter should be in the form
-  \fBaddress/prefixlen\fP where address is an IPv4 address, an IPv6 address, or a
-  MAC address. The prefix length is the number of significant front bits that
-  distinguish the subnet from other subnets. Example: \fB10.1.1.0/24\fP.
-.sp
-\fB\-\-shared\-key <key>\fP
-.RS 4
-An optional shared key to encrypt the VPN data. If this option is not set,
-the traffic will be sent unencrypted.
-.RE
-.sp
-\fB\-\-crypto <method>\fP
-.RS 4
-The encryption method to use ("aes256", or "chacha20"). Most current CPUs
-have special support for AES256 so this should be faster. For older
-computers lacking this support, only CHACHA20 is supported.
-[default: \fBchacha20\fP]
-.RE
-.sp
-\fB\-\-magic <id>\fP
-.RS 4
-Override the 4\-byte magic header of each packet. This header identifies the
-network and helps to distinguish it from other networks and other
-applications. The id can either be a 4 byte / 8 character hexadecimal
-string or an arbitrary string prefixed with "hash:" which will then be
-hashed into 4 bytes.
-.RE
-.sp
-\fB\-\-peer\-timeout <secs>\fP
-.RS 4
-Peer timeout in seconds. The peers will exchange information periodically
-and drop peers that are silent for this period of time. [default: \fB600\fP]
-.RE
-.sp
-\fB\-\-keepalive <secs>\fP
-.RS 4
-Interval of peer exchange messages in seconds. The peers will exchange
-information periodically to keep connections alive. This setting overrides
-how often this will happen. [default: \fBpeer\-timeout/2\-60\fP]
-.RE
-.sp
-\fB\-\-dst\-timeout <secs>\fP
-.RS 4
-Switch table entry timeout in seconds. This parameter is only used in switch
-mode. Addresses that have not been seen for the given period of time  will
-be forgotten. [default: \fB300\fP]
-.RE
-.sp
-\fB\-\-beacon\-store <path|command>\fP
-.RS 4
-Periodically store beacons containing the address of this node in the given
-file or via the given command. If the parameter value starts with a pipe
-character (\fB|\fP), the rest of the value is interpreted as a shell command.
-Otherwise the value is interpreted as a file to write the beacon to.
-If this parameter is not given, beacon storage is disabled.
-Please see the section \fBBEACONS\fP for more information.
-.RE
-.sp
-\fB\-\-beacon\-load <path|command>\fP
-.RS 4
-Periodically load beacons containing the addresses of other nodes from the
-given file or via the given command. If the parameter value starts with a
-pipe character (\fB|\fP), the rest of the value is interpreted as a shell
-command. Otherwise the value is interpreted as a file to read the beacon
-from.
-If this parameter is not given, beacon loading is disabled.
-Please see the section \fBBEACONS\fP for more information.
-.RE
-.sp
-\fB\-\-beacon\-interval <secs>\fP
-.RS 4
-Beacon storage/loading interval in seconds. If configured to do so via
-\fB\-\-beacon\-store\fP and \fB\-\-beacon\-load\fP, the node will periodically store its
-beacon and load beacons of other nodes. This parameter defines the interval
-in seconds. [default: \fB3600\fP]
-.RE
-.sp
-\fB\-\-ifup <command>\fP
-.RS 4
-A command to setup the network interface. The command will be run (as
-parameter to \fBsh \-c\fP) when the device has been created to configure it.
-The name of the allocated device will be available via the environment
-variable \fBIFNAME\fP.
-Please note that this command is executed with the full permissions of the
-caller.
-.RE
-.sp
-\fB\-\-ifdown <command>\fP
-.RS 4
-A command to bring down the network interface. The command will be run (as
-parameter to \fBsh \-c\fP) to remove any configuration from the device.
-The name of the allocated device will be available via the environment
-variable \fBIFNAME\fP.
-Please note that this command is executed with the (limited) permissions of
-the user and group given as \fB\-\-user\fP and \fB\-\-group\fP.
-.RE
-.sp
-\fB\-\-pid\-file <file>\fP
-.RS 4
-Store the process id in this file when running in the background. If set,
-the given file will be created containing the process id of the new
-background process. This option is only used when running in background.
-.RE
-.sp
-\fB\-\-user <user>\fP, \fB\-\-group <group>\fP
-.RS 4
-Change the user and/or group of the process once all the setup has been
-done.
-.RE
-.sp
-\fB\-\-log\-file <file>\fP
-.RS 4
-If set, print logs also to the given file. The file will be created and
-truncated if is exists.
-.RE
-.sp
-\fB\-\-stats\-file <file>\fP
-.RS 4
-If set, periodically write statistics on peers and current traffic to the
-given file. The file will be periodically overwritten with new data.
-.RE
-.sp
-\fB\-\-daemon\fP
-.RS 4
-Spawn a background process instead of running the process in the foreground.
-If this flag is set, the process will first carry out all the
-initialization, then drop permissions if \fB\-\-user\fP or \fB\-\-group\fP is used and
-then spawn a background process and write its process id to a file if
-\fB\-\-pid\-file\fP is set. Then, the main process will exit and the background
-process continues to provide the VPN. At the time, when the main process
-exits, the interface exists and is properly configured to be used.
-.RE
-.sp
-\fB\-\-no\-port\-forwarding\fP
-.RS 4
-Disable automatic port forward. If this option is not set, VpnCloud tries to
-detect a NAT router and automatically add a port forwarding to it.
-.RE
-.sp
-\fB\-v\fP, \fB\-\-verbose\fP
-.RS 4
-Print debug information, including information for data being received and
-sent.
-.RE
-.sp
-\fB\-q\fP, \fB\-\-quiet\fP
-.RS 4
-Only print errors and warnings.
-.RE
-.sp
-\fB\-h\fP, \fB\-\-help\fP
-.RS 4
-Display the help.
-.RE
-.SH "DESCRIPTION"
-.sp
-\fBVpnCloud\fP is a simple VPN over UDP. It creates a virtual network interface on
-the host and forwards all received data via UDP to the destination. It can work
-in 3 different modes:
-.sp
-\fBSwitch mode\fP
-.RS 4
-In this mode, the VPN will dynamically learn addresses
-as they are used as source addresses and use them to forward data to its
-destination. Addresses that have not been seen for some time
-(option \fBswitch_timeout\fP) will be forgotten. Data for unknown addresses will be
-broadcast to all peers. This mode is the default mode for TAP devices that
-process Ethernet frames but it can also be used with TUN devices and IP
-packets.
-.RE
-.sp
-\fBHub mode\fP
-.RS 4
-In this mode, all data will always be broadcast to all peers.
-This mode uses lots of bandwidth and should only be used in special cases.
-.RE
-.sp
-\fBRouter mode\fP
-.RS 4
-In this mode, data will be forwarded based on preconfigured
-address ranges ("subnets"). Data for unknown nodes will be silently ignored.
-This mode is the default mode for TUN devices that work with IP packets but
-it can also be used with TAP devices and Ethernet frames.
-.RE
-.sp
-All connected VpnCloud nodes will form a peer\-to\-peer network and cross\-connect
-automatically until the network is fully connected. The nodes will periodically
-exchange information with the other nodes to signal that they are still active
-and to allow the automatic cross\-connect behavior. There are some important
-things to note:
-.sp
-.RS 4
-.ie n \{\
-\h'-04' 1.\h'+01'\c
-.\}
-.el \{\
-.sp -1
-.IP " 1." 4.2
-.\}
-To avoid that different networks that reuse each others addresses merge due
-to the cross\-connect behavior, the \fBmagic\fP option can be used and set
-to any unique string to identify the network. The \fBmagic\fP must be the
-same on all nodes of the same VPN network.
-.RE
-.sp
-.RS 4
-.ie n \{\
-\h'-04' 2.\h'+01'\c
-.\}
-.el \{\
-.sp -1
-.IP " 2." 4.2
-.\}
-The cross\-connect behavior can be able to connect nodes that are behind
-firewalls or NATs as it can function as hole\-punching.
-.RE
-.sp
-.RS 4
-.ie n \{\
-\h'-04' 3.\h'+01'\c
-.\}
-.el \{\
-.sp -1
-.IP " 3." 4.2
-.\}
-The management traffic will increase with the peer number quadratically.
-It should still be reasonably small for high node numbers (below 10 KiB/s
-for 10.000 nodes). A longer \fBpeer_timeout\fP can be used to reduce the traffic
-further. For high node numbers, router mode should be used as it never
-broadcasts data.
-.RE
-.sp
-VpnCloud does not implement any loop\-avoidance. Since data received on the UDP
-socket will only be sent to the local network interface and vice versa, VpnCloud
-cannot produce loops on its own. On the TAP device, however STP data can be
-transported to avoid loops caused by other network components.
-.sp
-For TAP devices, IEEE 802.1q frames (VLAN tagged) are detected and forwarded
-based on separate MAC tables. Any nested tags (Q\-in\-Q) will be ignored.
-.SH "EXAMPLES"
-.SS "Switched TAP scenario"
-.sp
-In the example scenario, a simple layer 2 network tunnel is established. Most
-likely those commands need to be run as \fBroot\fP using \fBsudo\fP.
-.sp
-First, VpnCloud need to be started on both nodes (the address after \fB\-c\fP is the
-address of the remote node and the the \fBX\fP in the interface address must be
-unique among all nodes, e.g. 0, 1, 2, ...):
-.sp
-.if n \{\
-.RS 4
-.\}
-.nf
-vpncloud \-c REMOTE_HOST:PORT \-\-ifup \(aqifconfig $IFNAME 10.0.0.X/24 mtu 1400 up\(aq
-.fi
-.if n \{\
-.RE
-.\}
-.sp
-Afterwards, the interface can be used to communicate.
-.SS "Routed TUN example"
-.sp
-In this example, 2 nodes and their subnets should communicate using IP.
-First, VpnCloud need to be started on both nodes:
-.sp
-.if n \{\
-.RS 4
-.\}
-.nf
-vpncloud \-t tun \-c REMOTE_HOST:PORT \-\-subnet 10.0.X.0/24 \-\-ifup \(aqifconfig $IFNAME 10.0.X.1/16 mtu 1400 up\(aq
-.fi
-.if n \{\
-.RE
-.\}
-.sp
-It is important to configure the interface in a way that all addresses on the
-VPN can be reached directly. E.g. if subnets 10.0.1.0/24, 10.0.2.0/24 and so on
-are used, the interface needs to be configured as 10.0.1.1/16.
-For TUN devices, this means that the prefix length of the subnets
-(/24 in this example) must be different than the prefix length that the
-interface is configured with (/16 in this example).
-.SS "Important notes"
-.sp
-.RS 4
-.ie n \{\
-\h'-04' 1.\h'+01'\c
-.\}
-.el \{\
-.sp -1
-.IP " 1." 4.2
-.\}
-VpnCloud can be used to connect two separate networks. TAP networks can be
-bridged using \fBbrctl\fP and TUN networks must be routed. It is very important
-to be careful when setting up such a scenario in order to avoid network loops,
-security issues, DHCP issues and many more problems.
-.RE
-.sp
-.RS 4
-.ie n \{\
-\h'-04' 2.\h'+01'\c
-.\}
-.el \{\
-.sp -1
-.IP " 2." 4.2
-.\}
-TAP devices will forward DHCP data. If done intentionally, this can be used
-to assign unique addresses to all participants. If this happens accidentally,
-it can conflict with DHCP servers of the local network and can have severe
-side effects.
-.RE
-.sp
-.RS 4
-.ie n \{\
-\h'-04' 3.\h'+01'\c
-.\}
-.el \{\
-.sp -1
-.IP " 3." 4.2
-.\}
-VpnCloud is not designed for high security use cases. Although the used crypto
-primitives are expected to be very secure, their application has not been
-reviewed.
-The shared key is hashed using \fIScryptSalsa208Sha256\fP to derive a key,
-which is used to encrypt the payload of messages using \fIChaCha20Poly1305\fP or
-\fIAES256\-GCM\fP. The encryption includes an authentication that also protects the
-header.
-This method does only protect against attacks on single messages but not
-against attacks that manipulate the message series itself (i.e. suppress
-messages, reorder them, or duplicate them).
-.RE
-.SH "CONFIG FILES"
-.sp
-The config file is a YAML file that contains configuration values. All entries
-are optional and override the defaults. Please see the section \fBOPTIONS\fP for
-detailed descriptions of the options.
-.sp
-\fBdevice_type\fP
-.RS 4
-Set the type of network. Same as \fB\-\-type\fP
-.RE
-.sp
-\fBdevice_name\fP
-.RS 4
-Name of the virtual device. Same as \fB\-\-device\fP
-.RE
-.sp
-\fBdevice_path\fP
-.RS 4
-Set the path of the base device. Same as \fB\-\-device\-path\fP
-.RE
-.sp
-\fBifup\fP
-.RS 4
-A command to setup the network interface. Same as \fB\-\-ifup\fP
-.RE
-.sp
-\fBifdown\fP
-.RS 4
-A command to bring down the network interface. Same as \fB\-\-ifdown\fP
-.RE
-.sp
-\fBcrypto\fP
-.RS 4
-The encryption method to use. Same as \fB\-\-crypto\fP
-.RE
-.sp
-\fBshared_key\fP
-.RS 4
-The shared key to encrypt all traffic. Same as \fB\-\-shared\-key\fP
-.RE
-.sp
-\fBmagic\fP
-.RS 4
-Override the 4\-byte magic header of each packet. Same as \fB\-\-magic\fP
-.RE
-.sp
-\fBport\fP
-.RS 4
-A port number to listen on. This option is DEPRECATED.
-.RE
-.sp
-\fBlisten\fP
-.RS 4
-The address on which to listen for data. Same as \fB\-\-listen\fP
-.RE
-.sp
-\fBpeers\fP
-.RS 4
-A list of addresses to connect to. See \fB\-\-connect\fP
-.RE
-.sp
-\fBpeer_timeout\fP
-.RS 4
-Peer timeout in seconds. Same as\fB\-\-peer\-timeout\fP
-.RE
-.sp
-\fBbeacon_store\fP
-.RS 4
-Path or command to store beacons. Same as \fB\-\-beacon\-store\fP
-.RE
-.sp
-\fBbeacon_load\fP
-.RS 4
-Path or command to load beacons. Same as \fB\-\-beacon\-load\fP
-.RE
-.sp
-\fBbeacon_interval\fP
-.RS 4
-Interval for loading and storing beacons in seconds. Same as \fB\-\-beacon\-interval\fP
-.RE
-.sp
-\fBmode\fP
-.RS 4
-The mode of the VPN. Same as \fB\-\-mode\fP
-.RE
-.sp
-\fBswitch_timeout\fP
-.RS 4
-Switch table entry timeout in seconds. Same as \fB\-\-dst\-timeout\fP
-.RE
-.sp
-\fBsubnets\fP
-.RS 4
-A list of local subnets to use. See \fB\-\-subnet\fP
-.RE
-.sp
-\fBport_forwarding\fP
-.RS 4
-Whether to activate port forwardig. See \fB\-\-no\-port\-forwarding\fP
-.RE
-.sp
-\fBuser\fP
-.RS 4
-The name of a user to run the background process under. See \fB\-\-user\fP
-.RE
-.sp
-\fBgroup\fP
-.RS 4
-The name of a group to run the background process under. See \fB\-\-group\fP
-.RE
-.sp
-\fBpid_file\fP
-.RS 4
-The path of the pid file to create. See \fB\-\-pid\-file\fP
-.RE
-.sp
-\fBstats_file\fP
-.RS 4
-The path of the statistics file. See \fB\-\-stats\-file\fP
-.RE
-.SS "Example"
-.sp
-.if n \{\
-.RS 4
-.\}
-.nf
-device_type: tun
-device_name: vpncloud%d
-ifup: ifconfig $IFNAME 10.0.1.1/16 mtu 1400 up
-crypto: aes256
-shared_key: mysecret
-listen: 3210
-peers:
-  \- remote.machine.foo:3210
-  \- remote.machine.bar:3210
-peer_timeout: 600
-mode: normal
-subnets:
-  \- 10.0.1.0/24
-port_forwarding: true
-user: nobody
-group: nogroup
-pid_file: /run/vpncloud.pid
-.fi
-.if n \{\
-.RE
-.\}
-.SH "BEACONS"
-.sp
-Beacons are short character sequences that contain a timestamp and a list of
-addresses. They can be published and retrieved by other nodes to find peers
-without the need for static addresses.
-.sp
-The beacons are short (less than 100 characters), encrypted and encoded with
-printable characters to allow publishing them in various places on the
-internet, e.g.:
-.sp
-.RS 4
-.ie n \{\
-\h'-04'\(bu\h'+03'\c
-.\}
-.el \{\
-.sp -1
-.IP \(bu 2.3
-.\}
-On shared drives or synchronized folders (e.g. on Dropbox)
-.RE
-.sp
-.RS 4
-.ie n \{\
-\h'-04'\(bu\h'+03'\c
-.\}
-.el \{\
-.sp -1
-.IP \(bu 2.3
-.\}
-Via a dedicated database
-.RE
-.sp
-.RS 4
-.ie n \{\
-\h'-04'\(bu\h'+03'\c
-.\}
-.el \{\
-.sp -1
-.IP \(bu 2.3
-.\}
-Via a general purpose message board of message service (e.g. Twitter)
-.RE
-.sp
-The beacons are very robust. They only consist of alphanumeric characters
-and can be interleaved with non\-alphanumeric characters (e.g. whitespace).
-Also the beacons contain a prefix and suffix that depends on the configured
-network magic and secret key (if set) so that all nodes can find beacons in
-a long text.
-.sp
-When beacons are stored or loaded via a command (using the pipe character \fB|\fP),
-the command is interpreted using the configured shell \fBsh\fP. This command has
-access to the following environment variables:
-.sp
-\fB$begin\fP
-.RS 4
-The prefix of the beacon.
-.RE
-.sp
-\fB$end\fP
-.RS 4
-The suffix of the beacon.
-.RE
-.sp
-\fB$data\fP (only on store)
-.RS 4
-The middle part of the beacon. Do not use this
-without prefix and suffix!
-.RE
-.sp
-\fB$beacon\fP (only on store)
-.RS 4
-The full beacon consisting of prefix, data and
-suffix.
-The commands are called in separate threads, so even longer running commands
-will not block the node.
-.RE
-.SH "NETWORK PROTOCOL"
-.sp
-The protocol of VpnCloud is kept as simple as possible to allow other
-implementations and to maximize the performance.
-.sp
-Every packet sent over UDP contains the following header (in order):
-.sp
-4 bytes \fBmagic\fP
-.RS 4
-This field is used to identify the packet and to sort out packets that do
-not belong. The default is \fB[0x76, 0x70, 0x6e, 0x01]\fP ("vpn\(rsx01").
-This field can be used to identify VpnCloud packets and might be set to
-something different to hide the protocol.
-.RE
-.sp
-1 byte \fBcrypto method\fP
-.RS 4
-This field specifies the method that must be used to decrypt the rest of the
-data. The currently supported methods are:
-.sp
-.RS 4
-.ie n \{\
-\h'-04'\(bu\h'+03'\c
-.\}
-.el \{\
-.sp -1
-.IP \(bu 2.3
-.\}
-Method \fB0\fP, \fBNo encryption\fP: Rest of the data can be read without
-decrypting it.
-.RE
-.sp
-.RS 4
-.ie n \{\
-\h'-04'\(bu\h'+03'\c
-.\}
-.el \{\
-.sp -1
-.IP \(bu 2.3
-.\}
-Method \fB1\fP, \fBChaCha20\fP: The header is followed by a 12 byte
-\fInonce\fP. The rest of the data is encrypted with the
-\fBlibsodium::crypto_aead_chacha20poly1305_ietf\fP method, using the 8 byte
-header as additional data.
-.RE
-.sp
-.RS 4
-.ie n \{\
-\h'-04'\(bu\h'+03'\c
-.\}
-.el \{\
-.sp -1
-.IP \(bu 2.3
-.\}
-Method \fB2\fP, \fBAES256\fP: The header is followed by a 12 byte \fInonce\fP.
-The rest of the data is encrypted with the
-\fBlibsodium::crypto_aead_aes256gcm\fP method, using the 8 byte header
-as additional data.
-.RE
-.RE
-.sp
-2 \fBreserved bytes\fP
-.RS 4
-that are currently unused and set to 0
-.RE
-.sp
-1 byte for the \fBmessage type\fP
-.RS 4
-This byte specifies the type of message that follows. Currently the
-following message types are supported:
-.sp
-.RS 4
-.ie n \{\
-\h'-04'\(bu\h'+03'\c
-.\}
-.el \{\
-.sp -1
-.IP \(bu 2.3
-.\}
-Type 0: Data packet
-.RE
-.sp
-.RS 4
-.ie n \{\
-\h'-04'\(bu\h'+03'\c
-.\}
-.el \{\
-.sp -1
-.IP \(bu 2.3
-.\}
-Type 1: Peer list
-.RE
-.sp
-.RS 4
-.ie n \{\
-\h'-04'\(bu\h'+03'\c
-.\}
-.el \{\
-.sp -1
-.IP \(bu 2.3
-.\}
-Type 2: Initial message
-.RE
-.sp
-.RS 4
-.ie n \{\
-\h'-04'\(bu\h'+03'\c
-.\}
-.el \{\
-.sp -1
-.IP \(bu 2.3
-.\}
-Type 3: Closing message
-.RE
-.RE
-.sp
-After this 8 byte header, the rest of the message follows. It is encrypted using
-the method specified in the header.
-.sp
-In the decrypted data, the message as specified in the \fBmessage type\fP field
-will follow:
-.sp
-\fBData packet\fP (message type 0)
-.RS 4
-This packet contains payload. The format of the data depends on the device
-type. For TUN devices, this data contains an IP packet. For TAP devices it
-contains an Ethernet frame. The data starts right after the header and ends
-at the end of the packet.
-If it is an Ethernet frame, it will start with the destination MAC and end
-with the payload. It does not contain the preamble, SFD, padding, and CRC
-fields.
-.RE
-.sp
-\fBPeer list\fP (message type 1)
-.RS 4
-This packet contains the peer list of the sender. The first byte after the
-switch byte contains the number of IPv4 addresses that follow.
-After that, the specified number of addresses follow, where each address
-is encoded in 6 bytes. The first 4 bytes are the IPv4 address and the later
-2 bytes are port number (both in network byte order).
-After those addresses, the next byte contains the number of IPv6 addresses
-that follow. After that, the specified number of addresses follow, where
-each address is encoded in 18 bytes. The first 16 bytes are the IPv6 address
-and the later 2 bytes are port number (both in network byte order).
-.RE
-.sp
-\fBInitial message\fP (message type 2)
-.RS 4
-This packet contains the following information:
-.sp
-.RS 4
-.ie n \{\
-\h'-04'\(bu\h'+03'\c
-.\}
-.el \{\
-.sp -1
-.IP \(bu 2.3
-.\}
-The stage of the initialization process
-.RE
-.sp
-.RS 4
-.ie n \{\
-\h'-04'\(bu\h'+03'\c
-.\}
-.el \{\
-.sp -1
-.IP \(bu 2.3
-.\}
-A random node id to distinguish different nodes
-.RE
-.sp
-.RS 4
-.ie n \{\
-\h'-04'\(bu\h'+03'\c
-.\}
-.el \{\
-.sp -1
-.IP \(bu 2.3
-.\}
-All the local subnets claimed by the nodes
-.RE
-.sp
-Its first byte marks the stage of the initial handshake process.
-The next 16 bytes contain the unique node id. After that,
-the list of local subnets follows.
-The subnet list is encoded in the following way: Its first byte of data
-contains the number of encoded subnets that follow. After that, the given
-number of encoded subnets follow.
-For each subnet, the first byte is the length of bytes in the base address
-and is followed by the given number of base address bytes and one additional
-byte that is the prefix length of the subnet.
-The addresses for the subnet will be encoded like they are encoded in their
-native protocol (4 bytes for IPv4, 16 bytes for IPv6, and 6 bytes for a MAC
-address) with the exception of MAC addresses in a VLan which will be encoded
-in 8 bytes where the first 2 bytes are the VLan number in network byte order
-and the later 6 bytes are the MAC address.
-.RE
-.sp
-\fBClosing message\fP (message type 3)
-.RS 4
-This packet does not contain any more data.
-.RE
-.sp
-Nodes are expected to send an \fBinitial message\fP with stage 0 whenever they
-connect to a node they were not connected to before. As a reply to this message,
-another initial should be sent with stage 1. Also a \fBpeer list\fP message should
-be sent as a reply.
-.sp
-When connected, nodes should periodically send their \fBpeer list\fP to all
-of their peers to spread this information and to avoid peer timeouts.
-To avoid the cubic growth of management traffic, nodes should at a certain
-network size start sending partial peer lists instead of the full list. A
-reasonable number would be about 20 peers. The subsets should be selected
-randomly.
-.sp
-Nodes should remove peers from their peer list after a certain period of
-inactivity or when receiving a \fBclosing message\fP. Before shutting down, nodes
-should send the closing message to all of their peers in order to avoid
-receiving further data until the timeout is reached.
-.sp
-Nodes should only add nodes to their peer list after receiving an initial
-message from them instead of adding them right from the peer list of another
-peer. This is necessary to avoid the case of a large network keeping dead nodes
-alive.
-.SH "COPYRIGHT"
-.sp
-Copyright \(co 2015\-2020  Dennis Schwerdel
-This software is licensed under GPL\-3 or newer (see LICENSE.md)
--- a/benches/.code.rs
+++ b/benches/.code.rs
@ -0,0 +1,77 @@
+#[macro_use]
+mod util {
+    include!("../src/util.rs");
+}
+mod error {
+    include!("../src/error.rs");
+}
+mod payload {
+    include!("../src/payload.rs");
+}
+mod types {
+    include!("../src/types.rs");
+}
+mod table {
+    include!("../src/table.rs");
+}
+mod cloud {
+    include!("../src/cloud.rs");
+}
+mod config {
+    include!("../src/config.rs");
+}
+mod device {
+    include!("../src/device.rs");
+}
+mod net {
+    include!("../src/net.rs");
+}
+mod beacon {
+    include!("../src/beacon.rs");
+}
+mod messages {
+    include!("../src/messages.rs");
+}
+mod port_forwarding {
+    include!("../src/port_forwarding.rs");
+}
+mod traffic {
+    include!("../src/traffic.rs");
+}
+mod poll {
+    pub mod epoll{
+        include!("../src/poll/epoll.rs");
+    }
+    #[cfg(any(target_os = "linux", target_os = "android"))]
+    pub use self::epoll::EpollWait as WaitImpl;
+
+    use std::io;
+
+    pub enum WaitResult {
+        Timeout,
+        Socket,
+        Device,
+        Error(io::Error)
+    }
+}
+mod crypto {
+    pub mod core {
+        include!("../src/crypto/core.rs");
+    }
+    pub mod init {
+        include!("../src/crypto/init.rs");
+    }
+    pub mod rotate {
+        include!("../src/crypto/rotate.rs");
+    }
+    pub mod common {
+        include!("../src/crypto/common.rs");
+    }
+    pub use common::*;
+    pub use self::core::{EXTRA_LEN, TAG_LEN};
+}
+mod tests {
+    pub mod common {
+        include!("../src/tests/common.rs");
+    }
+}
--- a/benches/criterion.rs
+++ b/benches/criterion.rs
@ -10,31 +10,17 @@ use ring::aead;
 use std::str::FromStr;
 use std::net::{SocketAddr, Ipv4Addr, SocketAddrV4, UdpSocket};

-mod util {
-    include!("../src/util.rs");
-}
-mod error {
-    include!("../src/error.rs");
-}
-mod payload {
-    include!("../src/payload.rs");
-}
-mod types {
-    include!("../src/types.rs");
-}
-mod table {
-    include!("../src/table.rs");
-}
-mod crypto_core {
-    include!("../src/crypto/core.rs");
-}
+include!(".code.rs");

 pub use error::Error;
 use util::{MockTimeSource, MsgBuffer};
 use types::{Address, Range};
 use table::{ClaimTable};
+use device::Type;
+use config::Config;
 use payload::{Packet, Frame, Protocol};
-use crypto_core::{create_dummy_pair, EXTRA_LEN};
+use crypto::core::{create_dummy_pair, EXTRA_LEN};
+use tests::common::{TunSimulator, TapSimulator};

 fn udp_send(c: &mut Criterion) {
    let sock = UdpSocket::bind("127.0.0.1:0").unwrap();
@ -145,5 +131,74 @@ fn crypto_aes256(c: &mut Criterion) {
    crypto_bench(c, &aead::AES_256_GCM)
 }

-criterion_group!(benches, udp_send, decode_ipv4, decode_ipv6, decode_ethernet, decode_ethernet_with_vlan, lookup_cold, lookup_warm, crypto_chacha20, crypto_aes128, crypto_aes256);
+fn full_communication_tun_router(c: &mut Criterion) {
+    log::set_max_level(log::LevelFilter::Error);
+    let config1 = Config {
+        device_type: Type::Tun,
+        auto_claim: false,
+        claims: vec!["1.1.1.1/32".to_string()],
+        ..Config::default()
+    };
+    let config2 = Config {
+        device_type: Type::Tun,
+        auto_claim: false,
+        claims: vec!["2.2.2.2/32".to_string()],
+        ..Config::default()
+    };
+    let mut sim = TunSimulator::new();
+    let node1 = sim.add_node(false, &config1);
+    let node2 = sim.add_node(false, &config2);
+
+    sim.connect(node1, node2);
+    sim.simulate_all_messages();
+    assert!(sim.is_connected(node1, node2));
+    assert!(sim.is_connected(node2, node1));
+
+    let mut payload = vec![0x40, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2];
+    payload.append(&mut vec![0; 1400]);
+    let mut g = c.benchmark_group("full_communication");
+    g.throughput(Throughput::Bytes(2*1400));
+    g.bench_function("tun_router", |b| {
+        b.iter(|| {
+            sim.put_payload(node1, payload.clone());
+            sim.simulate_all_messages();
+            assert_eq!(Some(&payload), sim.pop_payload(node2).as_ref());
+        });
+    });
+    g.finish()
+}
+
+fn full_communication_tap_switch(c: &mut Criterion) {
+    log::set_max_level(log::LevelFilter::Error);    
+    let config = Config { device_type: Type::Tap, ..Config::default() };
+    let mut sim = TapSimulator::new();
+    let node1 = sim.add_node(false, &config);
+    let node2 = sim.add_node(false, &config);
+
+    sim.connect(node1, node2);
+    sim.simulate_all_messages();
+    assert!(sim.is_connected(node1, node2));
+    assert!(sim.is_connected(node2, node1));
+
+    let mut payload = vec![2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 2, 3, 4, 5];
+    payload.append(&mut vec![0; 1400]);
+    let mut g = c.benchmark_group("full_communication");
+    g.throughput(Throughput::Bytes(2*1400));
+    g.bench_function("tap_switch", |b| {
+        b.iter(|| {
+            sim.put_payload(node1, payload.clone());
+            sim.simulate_all_messages();
+            assert_eq!(Some(&payload), sim.pop_payload(node2).as_ref());
+        });
+    });
+    g.finish()
+}
+
+criterion_group!(benches, 
+    udp_send, 
+    decode_ipv4, decode_ipv6, decode_ethernet, decode_ethernet_with_vlan, 
+    lookup_cold, lookup_warm, 
+    crypto_chacha20, crypto_aes128, crypto_aes256,
+    full_communication_tun_router, full_communication_tap_switch
+);
 criterion_main!(benches);
--- a/benches/valgrind.rs
+++ b/benches/valgrind.rs
@ -0,0 +1,155 @@
+#![allow(dead_code, unused_macros, unused_imports)]
+#[macro_use] extern crate serde;
+#[macro_use] extern crate log;
+
+use iai::{black_box, main};
+
+use smallvec::smallvec;
+use ring::aead;
+
+use std::str::FromStr;
+use std::net::{SocketAddr, Ipv4Addr, SocketAddrV4, UdpSocket};
+
+include!(".code.rs");
+
+pub use error::Error;
+use util::{MockTimeSource, MsgBuffer};
+use config::Config;
+use types::{Address, Range};
+use device::Type;
+use table::{ClaimTable};
+use payload::{Packet, Frame, Protocol};
+use crypto::core::{create_dummy_pair, EXTRA_LEN};
+use tests::common::{TunSimulator, TapSimulator};
+
+fn udp_send() {
+    let sock = UdpSocket::bind("127.0.0.1:0").unwrap();
+    let data = [0; 1400];
+    let addr = SocketAddrV4::new(Ipv4Addr::new(127, 0, 0, 1), 1);
+    sock.send_to(&data, &black_box(addr)).unwrap();
+}
+
+fn decode_ipv4() {
+    let data = [0x40, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 192, 168, 1, 1, 192, 168, 1, 2];
+    Packet::parse(&black_box(data)).unwrap();
+}
+
+fn decode_ipv6() {
+    let data = [
+        0x60, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 0, 9, 8, 7, 6, 5, 4, 3, 2, 1, 6, 5,
+        4, 3, 2, 1
+    ];
+    Packet::parse(&black_box(data)).unwrap();
+}
+
+fn decode_ethernet() {
+    let data = [6, 5, 4, 3, 2, 1, 1, 2, 3, 4, 5, 6, 1, 2, 3, 4, 5, 6, 7, 8];
+    Frame::parse(&black_box(data)).unwrap();
+}
+
+fn decode_ethernet_with_vlan() {
+    let data = [6, 5, 4, 3, 2, 1, 1, 2, 3, 4, 5, 6, 0x81, 0, 4, 210, 1, 2, 3, 4, 5, 6, 7, 8];
+    Frame::parse(&black_box(data)).unwrap();
+}
+
+fn lookup_warm() {
+    let mut table = ClaimTable::<MockTimeSource>::new(60, 60);
+    let addr = Address::from_str("1.2.3.4").unwrap();
+    table.cache(addr, SocketAddr::from_str("1.2.3.4:3210").unwrap());
+    for _ in 0..1000 {
+        table.lookup(black_box(addr));
+    }
+}
+
+fn lookup_cold() {
+    let mut table = ClaimTable::<MockTimeSource>::new(60, 60);
+    let addr = Address::from_str("1.2.3.4").unwrap();
+    table.set_claims(SocketAddr::from_str("1.2.3.4:3210").unwrap(), smallvec![Range::from_str("1.2.3.4/32").unwrap()]);
+    for _ in 0..1000 {
+        table.clear_cache();
+        table.lookup(black_box(addr));
+    }
+}
+
+fn crypto_bench(algo: &'static aead::Algorithm) {
+    let mut buffer = MsgBuffer::new(EXTRA_LEN);
+    buffer.set_length(1400);
+    let (mut sender, mut receiver) = create_dummy_pair(algo);
+    for _ in 0..1000 {
+        sender.encrypt(black_box(&mut buffer));
+        receiver.decrypt(&mut buffer).unwrap();
+    }
+}
+
+fn crypto_chacha20() {
+    crypto_bench(&aead::CHACHA20_POLY1305)
+}
+
+fn crypto_aes128() {
+    crypto_bench(&aead::AES_128_GCM)
+}
+
+fn crypto_aes256() {
+    crypto_bench(&aead::AES_256_GCM)
+}
+
+fn full_communication_tun_router() {
+    log::set_max_level(log::LevelFilter::Error);
+    let config1 = Config {
+        device_type: Type::Tun,
+        auto_claim: false,
+        claims: vec!["1.1.1.1/32".to_string()],
+        ..Config::default()
+    };
+    let config2 = Config {
+        device_type: Type::Tun,
+        auto_claim: false,
+        claims: vec!["2.2.2.2/32".to_string()],
+        ..Config::default()
+    };
+    let mut sim = TunSimulator::new();
+    let node1 = sim.add_node(false, &config1);
+    let node2 = sim.add_node(false, &config2);
+
+    sim.connect(node1, node2);
+    sim.simulate_all_messages();
+    assert!(sim.is_connected(node1, node2));
+    assert!(sim.is_connected(node2, node1));
+
+    let mut payload = vec![0x40, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2];
+    payload.append(&mut vec![0; 1400]);
+    for _ in 0..1000 {
+        sim.put_payload(node1, payload.clone());
+        sim.simulate_all_messages();
+        assert_eq!(Some(&payload), black_box(sim.pop_payload(node2).as_ref()));
+    }
+}
+
+fn full_communication_tap_switch() {
+    log::set_max_level(log::LevelFilter::Error);
+    let config = Config { device_type: Type::Tap, ..Config::default() };
+    let mut sim = TapSimulator::new();
+    let node1 = sim.add_node(false, &config);
+    let node2 = sim.add_node(false, &config);
+
+    sim.connect(node1, node2);
+    sim.simulate_all_messages();
+    assert!(sim.is_connected(node1, node2));
+    assert!(sim.is_connected(node2, node1));
+
+    let mut payload = vec![2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 2, 3, 4, 5];
+    payload.append(&mut vec![0; 1400]);
+    for _ in 0..1000 {
+        sim.put_payload(node1, payload.clone());
+        sim.simulate_all_messages();
+        assert_eq!(Some(&payload), black_box(sim.pop_payload(node2).as_ref()));
+    }
+}
+
+iai::main!(
+    udp_send, 
+    decode_ipv4, decode_ipv6, decode_ethernet, decode_ethernet_with_vlan, 
+    lookup_cold, lookup_warm, 
+    crypto_chacha20, crypto_aes128, crypto_aes256,
+    full_communication_tun_router, full_communication_tap_switch
+);
--- a/build.rs
+++ b/build.rs
@ -1,5 +1,5 @@
 // VpnCloud - Peer-to-Peer VPN
-// Copyright (C) 2015-2020  Dennis Schwerdel
+// Copyright (C) 2015-2021  Dennis Schwerdel
 // This software is licensed under GPL-3 or newer (see LICENSE.md)

 use std::{env, fs, path::Path, process::Command};
--- a/contrib/WSProxyCloudFormation.yaml
+++ b/contrib/WSProxyCloudFormation.yaml
@ -0,0 +1,81 @@
+AWSTemplateFormatVersion: 2010-09-09
+Description: |
+  VpnCloud Websocket Proxy
+  This will configure a websocket proxy to be used with VpnCloud.
+  Versions: Ubuntu Server 20.04 LTS + VpnCloud 2.1.0
+Parameters:
+  LatestAmiId:
+    Description: "Image to use (just leave this as it is)"
+    Type: 'AWS::SSM::Parameter::Value<AWS::EC2::Image::Id>'
+    Default: '/aws/service/canonical/ubuntu/server/20.04/stable/current/arm64/hvm/ebs-gp2/ami-id'
+    AllowedValues:
+      - '/aws/service/canonical/ubuntu/server/20.04/stable/current/arm64/hvm/ebs-gp2/ami-id'
+Resources:
+  ProxySecurityGroup:
+    Type: 'AWS::EC2::SecurityGroup'
+    Properties:
+      GroupDescription: Enable HTTP access via port 80 and any UDP port
+      SecurityGroupIngress:
+        - IpProtocol: tcp
+          FromPort: '80'
+          ToPort: '80'
+          CidrIp: 0.0.0.0/0
+        - IpProtocol: udp
+          FromPort: '1024'
+          ToPort: '65535'
+          CidrIp: 0.0.0.0/0
+  LaunchTemplate:
+    Type: AWS::EC2::LaunchTemplate
+    DependsOn:
+      - ProxySecurityGroup 
+    Properties:
+      LaunchTemplateData:
+        ImageId: !Ref LatestAmiId
+        SecurityGroups:
+          - !Ref ProxySecurityGroup
+        InstanceMarketOptions:
+          MarketType: spot
+        InstanceType: t4g.nano
+        TagSpecifications:
+          - ResourceType: instance
+            Tags:
+            - Key: Name
+              Value: VpnCloud WS Proxy
+        CreditSpecification:
+          CpuCredits: standard
+        BlockDeviceMappings:
+        - DeviceName: /dev/sda1
+          Ebs:
+            VolumeType: standard
+            VolumeSize: '8'
+            DeleteOnTermination: 'true'
+            Encrypted: 'false'
+        UserData:
+          Fn::Base64: !Sub |
+            #cloud-config
+            packages:
+            - iperf3
+            - socat
+            runcmd:
+            - wget https://github.com/dswd/vpncloud/releases/download/v2.1.0/vpncloud_2.1.0_arm64.deb -O /tmp/vpncloud.deb
+            - dpkg -i /tmp/vpncloud.deb
+            - nohup vpncloud ws-proxy -l 80 &
+  ProxyInstance:
+    Type: 'AWS::EC2::Instance'
+    DependsOn:
+      - LaunchTemplate
+    Properties:
+      LaunchTemplate:
+        LaunchTemplateId:
+          Ref: LaunchTemplate
+        Version: 1
+Outputs:
+  ProxyURL:
+    Description: URL to use in VpnCloud config
+    Value: !Join 
+      - ''
+      - - 'ws://'
+        - !GetAtt 
+          - ProxyInstance
+          - PublicDnsName
+        - ':80'
--- a/contrib/example.py
+++ b/contrib/example.py
@ -6,8 +6,8 @@ import time
 setup = EC2Environment(
    region = "eu-central-1", 
    node_count = 2, 
-    instance_type = 't3.nano', 
-    vpncloud_version = "1.4.0"
+    instance_type = 't3a.nano', 
+    vpncloud_version = "2.1.0"
 )

 sender = setup.nodes[0]
--- a/contrib/measurements/2021-02-06_2.1.0_perf.json
+++ b/contrib/measurements/2021-02-06_2.1.0_perf.json
@ -0,0 +1,165 @@
+{
+  "meta": {
+    "region": "eu-central-1",
+    "instance_type": "m5.large",
+    "ami": "ami-0a6dc7529cd559185",
+    "version": "2.1.0",
+    "duration": 622.053159236908
+  },
+  "native": {
+    "iperf": {
+      "throughput": 9672965000.0,
+      "cpu_sender": 11.936759,
+      "cpu_receiver": 70.348812
+    },
+    "ping_100": {
+      "rtt_min": 0.046,
+      "rtt_max": 0.246,
+      "rtt_avg": 0.053,
+      "pkt_loss": 0.0
+    },
+    "ping_500": {
+      "rtt_min": 0.048,
+      "rtt_max": 0.183,
+      "rtt_avg": 0.055,
+      "pkt_loss": 0.0
+    },
+    "ping_1000": {
+      "rtt_min": 0.05,
+      "rtt_max": 0.272,
+      "rtt_avg": 0.057,
+      "pkt_loss": 0.0
+    }
+  },
+  "plain": {
+    "iperf": {
+      "throughput": 5728527000.0,
+      "cpu_sender": 11.004746,
+      "cpu_receiver": 67.527328
+    },
+    "ping_100": {
+      "rtt_min": 0.078,
+      "rtt_max": 0.372,
+      "rtt_avg": 0.095,
+      "pkt_loss": 0.0
+    },
+    "ping_500": {
+      "rtt_min": 0.078,
+      "rtt_max": 0.272,
+      "rtt_avg": 0.094,
+      "pkt_loss": 0.0
+    },
+    "ping_1000": {
+      "rtt_min": 0.082,
+      "rtt_max": 0.217,
+      "rtt_avg": 0.096,
+      "pkt_loss": 0.0
+    }
+  },
+  "aes256": {
+    "iperf": {
+      "throughput": 3706944000.0,
+      "cpu_sender": 6.465523,
+      "cpu_receiver": 60.216674
+    },
+    "ping_100": {
+      "rtt_min": 0.079,
+      "rtt_max": 0.28,
+      "rtt_avg": 0.097,
+      "pkt_loss": 0.0
+    },
+    "ping_500": {
+      "rtt_min": 0.079,
+      "rtt_max": 13.372,
+      "rtt_avg": 0.099,
+      "pkt_loss": 0.0
+    },
+    "ping_1000": {
+      "rtt_min": 0.086,
+      "rtt_max": 0.358,
+      "rtt_avg": 0.102,
+      "pkt_loss": 0.0
+    }
+  },
+  "aes128": {
+    "iperf": {
+      "throughput": 3876646000.0,
+      "cpu_sender": 6.800352,
+      "cpu_receiver": 61.738244
+    },
+    "ping_100": {
+      "rtt_min": 0.078,
+      "rtt_max": 0.219,
+      "rtt_avg": 0.096,
+      "pkt_loss": 0.0
+    },
+    "ping_500": {
+      "rtt_min": 0.083,
+      "rtt_max": 0.232,
+      "rtt_avg": 0.097,
+      "pkt_loss": 0.0
+    },
+    "ping_1000": {
+      "rtt_min": 0.087,
+      "rtt_max": 0.327,
+      "rtt_avg": 0.099,
+      "pkt_loss": 0.0
+    }
+  },
+  "chacha20": {
+    "iperf": {
+      "throughput": 2917879000.0,
+      "cpu_sender": 5.066722,
+      "cpu_receiver": 55.171241
+    },
+    "ping_100": {
+      "rtt_min": 0.081,
+      "rtt_max": 0.283,
+      "rtt_avg": 0.097,
+      "pkt_loss": 0.0
+    },
+    "ping_500": {
+      "rtt_min": 0.087,
+      "rtt_max": 0.348,
+      "rtt_avg": 0.103,
+      "pkt_loss": 0.0
+    },
+    "ping_1000": {
+      "rtt_min": 0.088,
+      "rtt_max": 0.309,
+      "rtt_avg": 0.105,
+      "pkt_loss": 0.0
+    }
+  },
+  "results": {
+    "throughput_mbits": {
+      "native": 9672.965,
+      "plain": 5728.527,
+      "aes256": 3706.944,
+      "aes128": 3876.646,
+      "chacha20": 2917.879
+    },
+    "latency_us": {
+      "plain": {
+        "100": 21.0,
+        "500": 19.5,
+        "1000": 19.5
+      },
+      "aes256": {
+        "100": 22.000000000000004,
+        "500": 22.000000000000004,
+        "1000": 22.499999999999996
+      },
+      "aes128": {
+        "100": 21.5,
+        "500": 21.0,
+        "1000": 21.0
+      },
+      "chacha20": {
+        "100": 22.000000000000004,
+        "500": 23.999999999999996,
+        "1000": 23.999999999999996
+      }
+    }
+  }
+}
--- a/contrib/performance.py
+++ b/contrib/performance.py
@ -8,7 +8,7 @@ from datetime import date
 # Note: this script will run for ~8 minutes and incur costs of about $ 0.02

 FILE = "../target/release/vpncloud"
-VERSION = "2.0.0-alpha1"
+VERSION = "2.1.0"
 REGION = "eu-central-1"

 env = EC2Environment(
--- a/contrib/testnet.py
+++ b/contrib/testnet.py
@ -5,11 +5,11 @@ import atexit, argparse, os

 REGION = "eu-central-1"

-VERSION = "2.0.0"
+VERSION = "2.1.0"


 parser = argparse.ArgumentParser(description='Create a test setup')
-parser.add_argument('--instancetype', default='t3.nano', help='EC2 instance type')
+parser.add_argument('--instancetype', default='t3a.nano', help='EC2 instance type')
 parser.add_argument('--version', default=VERSION, help='VpnCloud version to use')
 parser.add_argument('--count', '-c', dest="count", type=int, default=2, help='Number of instance to create')
 parser.add_argument('--cluster', action="store_true", help='Cluster instances to get reliable throughput')
@ -25,15 +25,22 @@ if args.keyname:
    with open(args.keyfile, 'r') as fp:
        privatekey = fp.read()

+opts = {}
+if os.path.exists(args.version):
+    opts["vpncloud_file"] = args.version
+    opts["vpncloud_version"] = None
+else:
+    opts["vpncloud_version"] = args.version
+
 setup = EC2Environment(
    region = REGION, 
    node_count = args.count, 
    instance_type = args.instancetype, 
-    vpncloud_version = args.version, 
    cluster_nodes = args.cluster,
    subnet = args.subnet or CREATE, 
    keyname = args.keyname or CREATE,
-    privatekey = privatekey
+    privatekey = privatekey,
+    **opts
 )

 if not args.keyname:
--- a/src/beacon.rs
+++ b/src/beacon.rs
@ -1,5 +1,5 @@
 // VpnCloud - Peer-to-Peer VPN
-// Copyright (C) 2019-2020  Dennis Schwerdel
+// Copyright (C) 2015-2021  Dennis Schwerdel
 // This software is licensed under GPL-3 or newer (see LICENSE.md)

 use ring::digest;
@ -325,15 +325,17 @@ impl<TS: TimeSource> BeaconSerializer<TS> {
 fn encode() {
    MockTimeSource::set_time(2000 * 3600);
    let ser = BeaconSerializer::<MockTimeSource>::new(b"mysecretkey");
-    let mut peers = Vec::new();
-    peers.push(SocketAddr::from_str("1.2.3.4:5678").unwrap());
-    peers.push(SocketAddr::from_str("6.6.6.6:53").unwrap());
+    let mut peers = vec![
+        SocketAddr::from_str("1.2.3.4:5678").unwrap(),
+        SocketAddr::from_str("6.6.6.6:53").unwrap()
+    ];
    assert_eq!("WsHI31EWDMBYxvITiILIrm2k9gEik22E", ser.encode(&peers));
    peers.push(SocketAddr::from_str("[::1]:5678").unwrap());
    assert_eq!("WsHI3GXKaXCveo6uejmZizZ72kR6Y0L9T7h49TXONp1ugfKvvvEik22E", ser.encode(&peers));
-    let mut peers = Vec::new();
-    peers.push(SocketAddr::from_str("1.2.3.4:5678").unwrap());
-    peers.push(SocketAddr::from_str("6.6.6.6:54").unwrap());
+    let peers = vec![
+        SocketAddr::from_str("1.2.3.4:5678").unwrap(),
+        SocketAddr::from_str("6.6.6.6:54").unwrap()
+    ];
    assert_eq!("WsHI32gm9eMSHP3Lm1GXcdP7rD3ik22E", ser.encode(&peers));
 }

@ -341,9 +343,10 @@ fn encode() {
 fn decode() {
    MockTimeSource::set_time(2000 * 3600);
    let ser = BeaconSerializer::<MockTimeSource>::new(b"mysecretkey");
-    let mut peers = Vec::new();
-    peers.push(SocketAddr::from_str("1.2.3.4:5678").unwrap());
-    peers.push(SocketAddr::from_str("6.6.6.6:53").unwrap());
+    let mut peers = vec![
+        SocketAddr::from_str("1.2.3.4:5678").unwrap(),
+        SocketAddr::from_str("6.6.6.6:53").unwrap()
+    ];
    assert_eq!(format!("{:?}", peers), format!("{:?}", ser.decode("WsHI31EWDMBYxvITiILIrm2k9gEik22E", None)));
    peers.push(SocketAddr::from_str("[::1]:5678").unwrap());
    assert_eq!(
@ -356,9 +359,10 @@ fn decode() {
 fn decode_split() {
    MockTimeSource::set_time(2000 * 3600);
    let ser = BeaconSerializer::<MockTimeSource>::new(b"mysecretkey");
-    let mut peers = Vec::new();
-    peers.push(SocketAddr::from_str("1.2.3.4:5678").unwrap());
-    peers.push(SocketAddr::from_str("6.6.6.6:53").unwrap());
+    let peers = vec![
+        SocketAddr::from_str("1.2.3.4:5678").unwrap(),
+        SocketAddr::from_str("6.6.6.6:53").unwrap()
+    ];
    assert_eq!(
        format!("{:?}", peers),
        format!("{:?}", ser.decode("WsHI3-1E.WD:MB Yx\tvI\nTi(IL)Ir[m2]k9ügEäik22E", None))
@ -373,9 +377,10 @@ fn decode_split() {
 fn decode_offset() {
    MockTimeSource::set_time(2000 * 3600);
    let ser = BeaconSerializer::<MockTimeSource>::new(b"mysecretkey");
-    let mut peers = Vec::new();
-    peers.push(SocketAddr::from_str("1.2.3.4:5678").unwrap());
-    peers.push(SocketAddr::from_str("6.6.6.6:53").unwrap());
+    let peers = vec![
+        SocketAddr::from_str("1.2.3.4:5678").unwrap(),
+        SocketAddr::from_str("6.6.6.6:53").unwrap()
+    ];
    assert_eq!(
        format!("{:?}", peers),
        format!("{:?}", ser.decode("Hello World: WsHI31EWDMBYxvITiILIrm2k9gEik22E! End of the World", None))
@ -386,9 +391,10 @@ fn decode_offset() {
 fn decode_multiple() {
    MockTimeSource::set_time(2000 * 3600);
    let ser = BeaconSerializer::<MockTimeSource>::new(b"mysecretkey");
-    let mut peers = Vec::new();
-    peers.push(SocketAddr::from_str("1.2.3.4:5678").unwrap());
-    peers.push(SocketAddr::from_str("6.6.6.6:53").unwrap());
+    let peers = vec![
+        SocketAddr::from_str("1.2.3.4:5678").unwrap(),
+        SocketAddr::from_str("6.6.6.6:53").unwrap()
+    ];
    assert_eq!(
        format!("{:?}", peers),
        format!("{:?}", ser.decode("WsHI31HVpqxFNMNSPrvik22E WsHI34yOBcZIulKdtn2ik22E", None))
@ -399,9 +405,6 @@ fn decode_multiple() {
 fn decode_ttl() {
    MockTimeSource::set_time(2000 * 3600);
    let ser = BeaconSerializer::<MockTimeSource>::new(b"mysecretkey");
-    let mut peers = Vec::new();
-    peers.push(SocketAddr::from_str("1.2.3.4:5678").unwrap());
-    peers.push(SocketAddr::from_str("6.6.6.6:53").unwrap());
    MockTimeSource::set_time(2000 * 3600);
    assert_eq!(2, ser.decode("WsHI31EWDMBYxvITiILIrm2k9gEik22E", None).len());
    MockTimeSource::set_time(2100 * 3600);
@ -440,9 +443,10 @@ fn decode_invalid() {
 fn encode_decode() {
    MockTimeSource::set_time(2000 * 3600);
    let ser = BeaconSerializer::<MockTimeSource>::new(b"mysecretkey");
-    let mut peers = Vec::new();
-    peers.push(SocketAddr::from_str("1.2.3.4:5678").unwrap());
-    peers.push(SocketAddr::from_str("6.6.6.6:53").unwrap());
+    let peers = vec![
+        SocketAddr::from_str("1.2.3.4:5678").unwrap(),
+        SocketAddr::from_str("6.6.6.6:53").unwrap()
+    ];
    let data = ser.encode(&peers);
    let peers2 = ser.decode(&data, None);
    assert_eq!(format!("{:?}", peers), format!("{:?}", peers2));
@ -452,9 +456,10 @@ fn encode_decode() {
 fn encode_decode_file() {
    MockTimeSource::set_time(2000 * 3600);
    let ser = BeaconSerializer::<MockTimeSource>::new(b"mysecretkey");
-    let mut peers = Vec::new();
-    peers.push(SocketAddr::from_str("1.2.3.4:5678").unwrap());
-    peers.push(SocketAddr::from_str("6.6.6.6:53").unwrap());
+    let peers = vec![
+        SocketAddr::from_str("1.2.3.4:5678").unwrap(),
+        SocketAddr::from_str("6.6.6.6:53").unwrap()
+    ];
    let file = tempfile::NamedTempFile::new().expect("Failed to create temp file");
    assert!(ser.write_to_file(&peers, file.path()).is_ok());
    let peers2 = ser.read_from_file(file.path(), None);
@ -466,9 +471,10 @@ fn encode_decode_file() {
 fn encode_decode_cmd() {
    MockTimeSource::set_time(2000 * 3600);
    let ser = BeaconSerializer::<MockTimeSource>::new(b"mysecretkey");
-    let mut peers = Vec::new();
-    peers.push(SocketAddr::from_str("1.2.3.4:5678").unwrap());
-    peers.push(SocketAddr::from_str("6.6.6.6:53").unwrap());
+    let peers = vec![
+        SocketAddr::from_str("1.2.3.4:5678").unwrap(),
+        SocketAddr::from_str("6.6.6.6:53").unwrap()
+    ];
    let file = tempfile::NamedTempFile::new().expect("Failed to create temp file");
    assert!(ser.write_to_cmd(&peers, &format!("echo $beacon > {}", file.path().display())).is_ok());
    thread::sleep(Duration::from_millis(100));
--- a/src/config.rs
+++ b/src/config.rs
@ -1,16 +1,15 @@
 // VpnCloud - Peer-to-Peer VPN
-// Copyright (C) 2015-2020  Dennis Schwerdel
+// Copyright (C) 2015-2021  Dennis Schwerdel
 // This software is licensed under GPL-3 or newer (see LICENSE.md)

-use super::{device::Type, types::Mode, util::Duration};
+use super::{device::Type, types::Mode, util::Duration, util::run_cmd};
 pub use crate::crypto::Config as CryptoConfig;
-use crate::util::run_cmd;
+
 use std::{
    cmp::max,
    collections::HashMap,
    ffi::OsStr,
-    net::{IpAddr, Ipv6Addr, SocketAddr},
-    process::Command,
+    process,
    thread
 };
 use structopt::{clap::Shell, StructOpt};
@ -18,17 +17,6 @@ use structopt::{clap::Shell, StructOpt};
 pub const DEFAULT_PEER_TIMEOUT: u16 = 300;
 pub const DEFAULT_PORT: u16 = 3210;

-fn parse_listen(addr: &str) -> SocketAddr {
-    if let Some(addr) = addr.strip_prefix("*:") {
-        let port = try_fail!(addr.parse::<u16>(), "Invalid port: {}");
-        SocketAddr::new(IpAddr::V6(Ipv6Addr::UNSPECIFIED), port)
-    } else if addr.contains(':') {
-        try_fail!(addr.parse::<SocketAddr>(), "Invalid address: {}: {}", addr)
-    } else {
-        let port = try_fail!(addr.parse::<u16>(), "Invalid port: {}");
-        SocketAddr::new(IpAddr::V6(Ipv6Addr::UNSPECIFIED), port)
-    }
-}

 #[derive(Deserialize, Debug, PartialEq, Clone)]
 pub struct Config {
@ -43,7 +31,7 @@ pub struct Config {

    pub crypto: CryptoConfig,

-    pub listen: SocketAddr,
+    pub listen: String,
    pub peers: Vec<String>,
    pub peer_timeout: Duration,
    pub keepalive: Option<Duration>,
@ -78,7 +66,7 @@ impl Default for Config {
            ifup: None,
            ifdown: None,
            crypto: CryptoConfig::default(),
-            listen: "[::]:3210".parse::<SocketAddr>().unwrap(),
+            listen: "3210".to_string(),
            peers: vec![],
            peer_timeout: DEFAULT_PEER_TIMEOUT as Duration,
            keepalive: None,
@ -131,7 +119,7 @@ impl Config {
            self.ifdown = Some(val);
        }
        if let Some(val) = file.listen {
-            self.listen = parse_listen(&val);
+            self.listen = val;
        }
        if let Some(mut val) = file.peers {
            self.peers.append(&mut val);
@ -235,7 +223,7 @@ impl Config {
            self.ifdown = Some(val);
        }
        if let Some(val) = args.listen {
-            self.listen = parse_listen(&val);
+            self.listen = val;
        }
        self.peers.append(&mut args.peers);
        if let Some(val) = args.peer_timeout {
@ -318,7 +306,7 @@ impl Config {
    pub fn get_keepalive(&self) -> Duration {
        match self.keepalive {
            Some(dur) => dur,
-            None => max(self.peer_timeout / 2 - 60, 1)
+            None => max(self.peer_timeout / 2 - 60, 1),
        }
    }

@ -336,7 +324,7 @@ impl Config {
            return
        }
        let script = script.unwrap();
-        let mut cmd = Command::new("sh");
+        let mut cmd = process::Command::new("sh");
        cmd.arg("-c").arg(script).envs(envs).env("EVENT", event);
        debug!("Running event script: {:?}", cmd);
        if detach {
@ -370,7 +358,7 @@ pub struct Args {
    pub mode: Option<Mode>,

    /// The shared password to encrypt all traffic
-    #[structopt(short, long, required_unless_one = &["private-key", "config", "genkey", "version", "completion"], env)]
+    #[structopt(short, long, env)]
    pub password: Option<String>,

    /// The private key to use
@ -461,10 +449,6 @@ pub struct Args {
    #[structopt(long)]
    pub version: bool,

-    /// Generate and print a key-pair and exit
-    #[structopt(long, conflicts_with = "private_key")]
-    pub genkey: bool,
-
    /// Disable automatic port forwarding
    #[structopt(long)]
    pub no_port_forwarding: bool,
@ -501,17 +485,47 @@ pub struct Args {
    #[structopt(long)]
    pub log_file: Option<String>,

-    /// Migrate an old config file
-    #[structopt(long, alias = "migrate", requires = "config")]
-    pub migrate_config: bool,
-
-    /// Generate shell completions
-    #[structopt(long)]
-    pub completion: Option<Shell>,
-
    /// Call script on event
    #[structopt(long)]
-    pub hook: Vec<String>
+    pub hook: Vec<String>,
+
+    #[structopt(subcommand)]
+    pub cmd: Option<Command>,
+}
+
+#[derive(StructOpt, Debug)]
+pub enum Command {
+    /// Generate and print a key-pair and exit
+    #[structopt(name = "genkey", alias = "gen-key")]
+    GenKey {
+        /// The shared password to encrypt all traffic
+        #[structopt(short, long, env)]
+        password: Option<String>,
+    },
+
+    /// Run a websocket proxy
+    #[cfg(feature = "websocket")]
+    #[structopt(alias = "wsproxy")]
+    WsProxy {
+        /// Websocket listen address IP:PORT
+        #[structopt(long, short, default_value="3210")]
+        listen: String
+    },
+
+    /// Migrate an old config file
+    #[structopt(alias = "migrate")]
+    MigrateConfig {
+        /// Config file
+        #[structopt(long)]
+        config_file: String,
+    },
+
+    /// Generate shell completions
+    Completion {
+        /// Shell to create completions for
+        #[structopt(long, default_value="bash")]
+        shell: Shell
+    }
 }

 #[derive(Serialize, Deserialize, Debug, PartialEq, Default)]
@ -521,7 +535,7 @@ pub struct ConfigFileDevice {
    pub type_: Option<Type>,
    pub name: Option<String>,
    pub path: Option<String>,
-    pub fix_rp_filter: Option<bool>
+    pub fix_rp_filter: Option<bool>,
 }

 #[derive(Serialize, Deserialize, Debug, PartialEq, Default)]
@ -530,14 +544,14 @@ pub struct ConfigFileBeacon {
    pub store: Option<String>,
    pub load: Option<String>,
    pub interval: Option<Duration>,
-    pub password: Option<String>
+    pub password: Option<String>,
 }

 #[derive(Serialize, Deserialize, Debug, PartialEq, Default)]
 #[serde(rename_all = "kebab-case", deny_unknown_fields, default)]
 pub struct ConfigFileStatsd {
    pub server: Option<String>,
-    pub prefix: Option<String>
+    pub prefix: Option<String>,
 }

 #[derive(Serialize, Deserialize, Debug, PartialEq, Default)]
@ -603,7 +617,9 @@ statsd:
  server: example.com:1234
  prefix: prefix
    ";
-    assert_eq!(serde_yaml::from_str::<ConfigFile>(config_file).unwrap(), ConfigFile {
+    assert_eq!(
+        serde_yaml::from_str::<ConfigFile>(config_file).unwrap(),
+        ConfigFile {
            device: Some(ConfigFileDevice {
                type_: Some(Type::Tun),
                name: Some("vpncloud%d".to_string()),
@ -639,47 +655,13 @@ statsd:
            }),
            hook: None,
            hooks: HashMap::new()
-    })
+        }
+    )
 }

 #[test]
-fn default_config_as_default() {
-    let mut default_config = Config {
-        device_type: Type::Tun,
-        device_name: "".to_string(),
-        device_path: None,
-        fix_rp_filter: false,
-        ip: None,
-        ifup: None,
-        ifdown: None,
-        crypto: CryptoConfig::default(),
-        listen: "[::]:3210".parse::<SocketAddr>().unwrap(),
-        peers: vec![],
-        peer_timeout: 0,
-        keepalive: None,
-        beacon_store: None,
-        beacon_load: None,
-        beacon_interval: 0,
-        beacon_password: None,
-        mode: Mode::Hub,
-        switch_timeout: 0,
-        claims: vec![],
-        auto_claim: true,
-        port_forwarding: true,
-        daemonize: false,
-        pid_file: None,
-        stats_file: None,
-        statsd_server: None,
-        statsd_prefix: None,
-        user: None,
-        group: None,
-        hook: None,
-        hooks: HashMap::new()
-    };
-    let default_config_file =
+fn parse_example_config() {
    serde_yaml::from_str::<ConfigFile>(include_str!("../assets/example.net.disabled")).unwrap();
-    default_config.merge_file(default_config_file);
-    assert_eq!(default_config, Config::default());
 }

 #[test]
@ -690,7 +672,7 @@ fn config_merge() {
            type_: Some(Type::Tun),
            name: Some("vpncloud%d".to_string()),
            path: None,
-            fix_rp_filter: None
+            fix_rp_filter: None,
        }),
        ip: None,
        ifup: Some("ifconfig $IFNAME 10.0.1.1/16 mtu 1400 up".to_string()),
@ -704,7 +686,7 @@ fn config_merge() {
            store: Some("/run/vpncloud.beacon.out".to_string()),
            load: Some("/run/vpncloud.beacon.in".to_string()),
            interval: Some(7200),
-            password: Some("test123".to_string())
+            password: Some("test123".to_string()),
        }),
        mode: Some(Mode::Normal),
        switch_timeout: Some(300),
@ -717,7 +699,7 @@ fn config_merge() {
        stats_file: Some("/var/log/vpncloud.stats".to_string()),
        statsd: Some(ConfigFileStatsd {
            server: Some("example.com:1234".to_string()),
-            prefix: Some("prefix".to_string())
+            prefix: Some("prefix".to_string()),
        }),
        hook: None,
        hooks: HashMap::new()
@ -729,7 +711,7 @@ fn config_merge() {
        ip: None,
        ifup: Some("ifconfig $IFNAME 10.0.1.1/16 mtu 1400 up".to_string()),
        ifdown: Some("true".to_string()),
-        listen: "[::]:3210".parse::<SocketAddr>().unwrap(),
+        listen: "3210".to_string(),
        peers: vec!["remote.machine.foo:3210".to_string(), "remote.machine.bar:3210".to_string()],
        peer_timeout: 600,
        keepalive: Some(840),
@ -756,7 +738,7 @@ fn config_merge() {
        ifup: Some("ifconfig $IFNAME 10.0.1.2/16 mtu 1400 up".to_string()),
        ifdown: Some("ifconfig $IFNAME down".to_string()),
        password: Some("anothersecret".to_string()),
-        listen: Some("3211".to_string()),
+        listen: Some("[::]:3211".to_string()),
        peer_timeout: Some(1801),
        keepalive: Some(850),
        switch_timeout: Some(301),
@ -786,7 +768,7 @@ fn config_merge() {
        ifup: Some("ifconfig $IFNAME 10.0.1.2/16 mtu 1400 up".to_string()),
        ifdown: Some("ifconfig $IFNAME down".to_string()),
        crypto: CryptoConfig { password: Some("anothersecret".to_string()), ..CryptoConfig::default() },
-        listen: "[::]:3211".parse::<SocketAddr>().unwrap(),
+        listen: "[::]:3211".to_string(),
        peers: vec![
            "remote.machine.foo:3210".to_string(),
            "remote.machine.bar:3210".to_string(),
--- a/src/crypto/common.rs
+++ b/src/crypto/common.rs
@ -0,0 +1,392 @@
+use super::{core::test_speed, rotate::RotationState};
+pub use super::{
+    core::{CryptoCore, EXTRA_LEN, TAG_LEN},
+    init::{is_init_message, INIT_MESSAGE_FIRST_BYTE, InitState, InitResult}
+};
+use crate::{
+    error::Error,
+    types::NodeId,
+    util::{from_base62, to_base62, MsgBuffer}
+};
+use ring::{
+    aead::{self, Algorithm, LessSafeKey, UnboundKey},
+    agreement::{EphemeralPrivateKey, UnparsedPublicKey},
+    pbkdf2,
+    rand::{SecureRandom, SystemRandom},
+    signature::{Ed25519KeyPair, KeyPair, ED25519_PUBLIC_KEY_LEN}
+};
+use smallvec::{smallvec, SmallVec};
+use std::{fmt::Debug, io::Read, num::NonZeroU32, sync::Arc, time::Duration};
+
+
+const SALT: &[u8; 32] = b"vpncloudVPNCLOUDvpncl0udVpnCloud";
+
+pub const MESSAGE_TYPE_ROTATION: u8 = 0x10;
+
+pub type Ed25519PublicKey = [u8; ED25519_PUBLIC_KEY_LEN];
+pub type EcdhPublicKey = UnparsedPublicKey<SmallVec<[u8; 96]>>;
+pub type EcdhPrivateKey = EphemeralPrivateKey;
+pub type Key = SmallVec<[u8; 32]>;
+
+
+const DEFAULT_ALGORITHMS: [&str; 3] = ["AES128", "AES256", "CHACHA20"];
+
+#[cfg(test)]
+const SPEED_TEST_TIME: f32 = 0.02;
+#[cfg(not(test))]
+const SPEED_TEST_TIME: f32 = 0.1;
+
+const ROTATE_INTERVAL: usize = 120;
+
+
+pub trait Payload: Debug + PartialEq + Sized {
+    fn write_to(&self, buffer: &mut MsgBuffer);
+    fn read_from<R: Read>(r: R) -> Result<Self, Error>;
+}
+
+
+#[derive(Clone)]
+pub struct Algorithms {
+    pub algorithm_speeds: SmallVec<[(&'static Algorithm, f32); 3]>,
+    pub allow_unencrypted: bool
+}
+
+#[derive(Debug, Default, Deserialize, Serialize, Clone, PartialEq)]
+#[serde(rename_all = "kebab-case", deny_unknown_fields, default)]
+pub struct Config {
+    pub password: Option<String>,
+    pub private_key: Option<String>,
+    pub public_key: Option<String>,
+    pub trusted_keys: Vec<String>,
+    pub algorithms: Vec<String>
+}
+
+pub struct Crypto {
+    node_id: NodeId,
+    key_pair: Arc<Ed25519KeyPair>,
+    trusted_keys: Arc<[Ed25519PublicKey]>,
+    algorithms: Algorithms
+}
+
+impl Crypto {
+    pub fn new(node_id: NodeId, config: &Config) -> Result<Self, Error> {
+        let key_pair = if let Some(priv_key) = &config.private_key {
+            if let Some(pub_key) = &config.public_key {
+                Self::parse_keypair(priv_key, pub_key)?
+            } else {
+                Self::parse_private_key(priv_key)?
+            }
+        } else if let Some(password) = &config.password {
+            Self::keypair_from_password(password)
+        } else {
+            return Err(Error::InvalidConfig("Either private_key or password must be set"))
+        };
+        let mut trusted_keys = vec![];
+        for tn in &config.trusted_keys {
+            trusted_keys.push(Self::parse_public_key(tn)?);
+        }
+        if trusted_keys.is_empty() {
+            info!("Trusted keys not set, trusting only own public key");
+            let mut key = [0; ED25519_PUBLIC_KEY_LEN];
+            key.clone_from_slice(key_pair.public_key().as_ref());
+            trusted_keys.push(key);
+        }
+        let mut algos = Algorithms { algorithm_speeds: smallvec![], allow_unencrypted: false };
+        let algorithms = config.algorithms.iter().map(|a| a as &str).collect::<Vec<_>>();
+        let allowed = if algorithms.is_empty() { &DEFAULT_ALGORITHMS } else { &algorithms as &[&str] };
+        let duration = Duration::from_secs_f32(SPEED_TEST_TIME);
+        let mut speeds = Vec::new();
+        for name in allowed {
+            let algo = match &name.to_uppercase() as &str {
+                "UNENCRYPTED" | "NONE" | "PLAIN" => {
+                    algos.allow_unencrypted = true;
+                    warn!("Crypto settings allow unencrypted connections");
+                    continue
+                }
+                "AES128" | "AES128_GCM" | "AES_128" | "AES_128_GCM" => &aead::AES_128_GCM,
+                "AES256" | "AES256_GCM" | "AES_256" | "AES_256_GCM" => &aead::AES_256_GCM,
+                "CHACHA" | "CHACHA20" | "CHACHA20_POLY1305" => &aead::CHACHA20_POLY1305,
+                _ => return Err(Error::InvalidConfig("Unknown crypto method"))
+            };
+            let speed = test_speed(algo, &duration);
+            algos.algorithm_speeds.push((algo, speed as f32));
+            speeds.push((name, speed as f32));
+        }
+        if !speeds.is_empty() {
+            info!(
+                "Crypto speeds: {}",
+                speeds.into_iter().map(|(a, s)| format!("{}: {:.1} MiB/s", a, s)).collect::<Vec<_>>().join(", ")
+            );
+        }
+        Ok(Self {
+            node_id,
+            key_pair: Arc::new(key_pair),
+            trusted_keys: trusted_keys.into_boxed_slice().into(),
+            algorithms: algos
+        })
+    }
+
+    pub fn generate_keypair(password: Option<&str>) -> (String, String) {
+        let mut bytes = [0; 32];
+        match password {
+            None => {
+                let rng = SystemRandom::new();
+                rng.fill(&mut bytes).unwrap();
+            }
+            Some(password) => {
+                pbkdf2::derive(
+                    pbkdf2::PBKDF2_HMAC_SHA256,
+                    NonZeroU32::new(4096).unwrap(),
+                    SALT,
+                    password.as_bytes(),
+                    &mut bytes
+                );
+            }
+        }
+        let keypair = Ed25519KeyPair::from_seed_unchecked(&bytes).unwrap();
+        let privkey = to_base62(&bytes);
+        let pubkey = to_base62(keypair.public_key().as_ref());
+        (privkey, pubkey)
+    }
+
+    fn keypair_from_password(password: &str) -> Ed25519KeyPair {
+        let mut key = [0; 32];
+        pbkdf2::derive(pbkdf2::PBKDF2_HMAC_SHA256, NonZeroU32::new(4096).unwrap(), SALT, password.as_bytes(), &mut key);
+        Ed25519KeyPair::from_seed_unchecked(&key).unwrap()
+    }
+
+    fn parse_keypair(privkey: &str, pubkey: &str) -> Result<Ed25519KeyPair, Error> {
+        let privkey = from_base62(privkey).map_err(|_| Error::InvalidConfig("Failed to parse private key"))?;
+        let pubkey = from_base62(pubkey).map_err(|_| Error::InvalidConfig("Failed to parse public key"))?;
+        let keypair = Ed25519KeyPair::from_seed_and_public_key(&privkey, &pubkey)
+            .map_err(|_| Error::InvalidConfig("Keys rejected by crypto library"))?;
+        Ok(keypair)
+    }
+
+    fn parse_private_key(privkey: &str) -> Result<Ed25519KeyPair, Error> {
+        let privkey = from_base62(privkey).map_err(|_| Error::InvalidConfig("Failed to parse private key"))?;
+        let keypair = Ed25519KeyPair::from_seed_unchecked(&privkey)
+            .map_err(|_| Error::InvalidConfig("Key rejected by crypto library"))?;
+        Ok(keypair)
+    }
+
+    fn parse_public_key(pubkey: &str) -> Result<Ed25519PublicKey, Error> {
+        let pubkey = from_base62(pubkey).map_err(|_| Error::InvalidConfig("Failed to parse public key"))?;
+        if pubkey.len() != ED25519_PUBLIC_KEY_LEN {
+            return Err(Error::InvalidConfig("Failed to parse public key"))
+        }
+        let mut result = [0; ED25519_PUBLIC_KEY_LEN];
+        result.clone_from_slice(&pubkey);
+        Ok(result)
+    }
+
+    pub fn peer_instance<P: Payload>(&self, payload: P) -> InitState<P> {
+        InitState::new(self.node_id, payload, self.key_pair.clone(), self.trusted_keys.clone(), self.algorithms.clone())
+    }
+}
+
+
+#[derive(Debug, PartialEq)]
+pub enum MessageResult {
+    Message(u8),
+    Reply,
+    None
+}
+
+
+pub enum PeerCrypto {
+    Encrypted {
+        last_init_message: Vec<u8>,
+        algorithm: &'static Algorithm,
+        rotation: RotationState,
+        core: Arc<CryptoCore>,
+        rotate_counter: usize
+    },
+    Unencrypted {
+        last_init_message: Vec<u8>
+    }
+}
+
+impl PeerCrypto {
+    pub fn algorithm_name(&self) -> &'static str {
+        match self {
+            PeerCrypto::Encrypted { algorithm, .. } => {
+                match *algorithm {
+                    x if x == &aead::CHACHA20_POLY1305 => "CHACHA20",
+                    x if x == &aead::AES_128_GCM => "AES128",
+                    x if x == &aead::AES_256_GCM => "AES256",
+                    _ => unreachable!()
+                }
+            }
+            PeerCrypto::Unencrypted { .. } => "PLAIN"
+        }
+    }
+
+    fn handle_init_message(&mut self, buffer: &mut MsgBuffer) -> Result<MessageResult, Error> {
+        // TODO: parse message stage
+        // TODO: depending on stage resend last message
+        Ok(MessageResult::None)
+    }
+
+    fn handle_rotate_message(&mut self, data: &[u8]) -> Result<(), Error> {
+        match self {
+            PeerCrypto::Encrypted { rotation, core, algorithm, .. } => {
+                if let Some(rot) = rotation.handle_message(data)? {
+                    let key = LessSafeKey::new(UnboundKey::new(algorithm, &rot.key[..algorithm.key_len()]).unwrap());
+                    core.rotate_key(key, rot.id, rot.use_for_sending);
+                }
+                Ok(())
+            }
+            PeerCrypto::Unencrypted { .. } => Err(Error::Crypto("Rotation when unencrypted"))
+        }
+    }
+
+    fn encrypt_message(&mut self, buffer: &mut MsgBuffer) {
+        // HOT PATH
+        if let PeerCrypto::Encrypted { core, .. } = self {
+            core.encrypt(buffer)
+        }
+    }
+
+    fn decrypt_message(&mut self, buffer: &mut MsgBuffer) -> Result<(), Error> {
+        // HOT PATH
+        if let PeerCrypto::Encrypted { core, .. } = self {
+            core.decrypt(buffer)
+        } else {
+            Ok(())
+        }
+    }
+
+    pub fn handle_message(&mut self, buffer: &mut MsgBuffer) -> Result<MessageResult, Error> {
+        // HOT PATH
+        if buffer.is_empty() {
+            return Err(Error::InvalidCryptoState("No message in buffer"))
+        }
+        if is_init_message(buffer.buffer()) {
+            // COLD PATH
+            debug!("Received init message");
+            self.handle_init_message(buffer)
+        } else {
+            // HOT PATH
+            debug!("Received encrypted message");
+            self.decrypt_message(buffer)?;
+            let msg_type = buffer.take_prefix();
+            if msg_type == MESSAGE_TYPE_ROTATION {
+                // COLD PATH
+                debug!("Received rotation message");
+                self.handle_rotate_message(buffer.buffer())?;
+                buffer.clear();
+                Ok(MessageResult::None)
+            } else {
+                Ok(MessageResult::Message(msg_type))
+            }
+        }
+    }
+
+    pub fn send_message(&mut self, type_: u8, buffer: &mut MsgBuffer) {
+        // HOT PATH
+        assert_ne!(type_, MESSAGE_TYPE_ROTATION);
+        buffer.prepend_byte(type_);
+        self.encrypt_message(buffer);
+    }
+
+    pub fn every_second(&mut self, out: &mut MsgBuffer) -> MessageResult {
+        out.clear();
+        if let PeerCrypto::Encrypted { core, rotation, rotate_counter, algorithm, .. } = self {
+            core.every_second();
+            *rotate_counter += 1;
+            if *rotate_counter >= ROTATE_INTERVAL {
+                *rotate_counter = 0;
+                if let Some(rot) = rotation.cycle(out) {
+                    let key = LessSafeKey::new(UnboundKey::new(algorithm, &rot.key[..algorithm.key_len()]).unwrap());
+                    core.rotate_key(key, rot.id, rot.use_for_sending);
+                }
+                if !out.is_empty() {
+                    out.prepend_byte(MESSAGE_TYPE_ROTATION);
+                    self.encrypt_message(out);
+                    return MessageResult::Reply
+                }
+            }
+        }
+        MessageResult::None
+    }
+}
+
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    use crate::types::NODE_ID_BYTES;
+
+    fn create_node(config: &Config) -> InitState<Vec<u8>> {
+        let rng = SystemRandom::new();
+        let mut node_id = [0; NODE_ID_BYTES];
+        rng.fill(&mut node_id).unwrap();
+        let crypto = Crypto::new(node_id, config).unwrap();
+        crypto.peer_instance(vec![])
+    }
+
+    #[test]
+    fn normal() {
+        let config = Config { password: Some("test".to_string()), ..Default::default() };
+        let mut node1 = create_node(&config);
+        let mut node2 = create_node(&config);
+        let mut msg = MsgBuffer::new(16);
+
+        node1.send_ping(&mut msg);
+        assert!(!msg.is_empty());
+
+        debug!("Node1 -> Node2");
+        let res = node2.handle_init(&mut msg).unwrap();
+        assert_eq!(res, InitResult::Continue);
+        assert!(!msg.is_empty());
+
+        debug!("Node1 <- Node2");
+        let res = node1.handle_init(&mut msg).unwrap();
+        assert_eq!(res, InitResult::Success { peer_payload: vec![], is_initiator: false });
+        assert!(!msg.is_empty());
+
+        debug!("Node1 -> Node2");
+        let res = node2.handle_init(&mut msg).unwrap();
+        assert_eq!(res, InitResult::Success { peer_payload: vec![], is_initiator: true });
+        assert!(msg.is_empty());
+
+        let node1 = node1.finish(&mut msg);
+        assert!(msg.is_empty());
+        let node2 = node2.finish(&mut msg);
+        assert!(msg.is_empty());
+
+        debug!("Node1 <- Node2");
+        let res = node1.handle_message(&mut msg).unwrap();
+        assert_eq!(res, MessageResult::None);
+        assert!(msg.is_empty());
+
+        let mut buffer = MsgBuffer::new(16);
+        let rng = SystemRandom::new();
+        buffer.set_length(1000);
+        rng.fill(buffer.message_mut()).unwrap();
+        for _ in 0..1000 {
+            node1.send_message(1, &mut buffer);
+            let res = node2.handle_message(&mut buffer).unwrap();
+            assert_eq!(res, MessageResult::Message(1));
+
+            match node1.every_second(&mut msg) {
+                MessageResult::None => (),
+                MessageResult::Reply => {
+                    let res = node2.handle_message(&mut msg).unwrap();
+                    assert_eq!(res, MessageResult::None);
+                }
+                other => assert_eq!(other, MessageResult::None)
+            }
+            match node2.every_second(&mut msg) {
+                MessageResult::None => (),
+                MessageResult::Reply => {
+                    let res = node1.handle_message(&mut msg).unwrap();
+                    assert_eq!(res, MessageResult::None);
+                }
+                other => assert_eq!(other, MessageResult::None)
+            }
+        }
+    }
+}
--- a/src/crypto/core.rs
+++ b/src/crypto/core.rs
@ -1,3 +1,7 @@
+// VpnCloud - Peer-to-Peer VPN
+// Copyright (C) 2015-2021  Dennis Schwerdel
+// This software is licensed under GPL-3 or newer (see LICENSE.md)
+
 // This module implements a crypto core for encrypting and decrypting message streams
 //
 // The crypto core only encrypts and decrypts messages, using given keys. Negotiating and rotating the keys is out of
@ -51,7 +55,7 @@ use std::{
    time::{Duration, Instant}
 };

-use super::{Error, MsgBuffer};
+use crate::{error::Error, util::MsgBuffer};


 const NONCE_LEN: usize = 12;
--- a/src/crypto/init.rs
+++ b/src/crypto/init.rs
@ -1,3 +1,7 @@
+// VpnCloud - Peer-to-Peer VPN
+// Copyright (C) 2015-2021  Dennis Schwerdel
+// This software is licensed under GPL-3 or newer (see LICENSE.md)
+
 // This module implements a 3-way handshake to initialize an authenticated and encrypted connection.
 //
 // The handshake assumes that each node has a asymmetric Curve 25519 key pair as well as a list of trusted public keys
@ -54,10 +58,10 @@
 use super::{
    core::{CryptoCore, EXTRA_LEN},
    rotate::RotationState,
-    Algorithms, EcdhPrivateKey, EcdhPublicKey, Ed25519PublicKey, Error, MsgBuffer, Payload, PeerCrypto,
-    MESSAGE_TYPE_ROTATION
+    Algorithms, EcdhPrivateKey, EcdhPublicKey, Ed25519PublicKey, Payload, PeerCrypto,
+    common::MESSAGE_TYPE_ROTATION
 };
-use crate::types::NodeId;
+use crate::{error::Error, types::NodeId, util::MsgBuffer};
 use byteorder::{NetworkEndian, ReadBytesExt, WriteBytesExt};
 use ring::{
    aead::{Algorithm, LessSafeKey, UnboundKey, AES_128_GCM, AES_256_GCM, CHACHA20_POLY1305},
@ -403,6 +407,7 @@ pub struct InitState<P: Payload> {
    last_message: Option<Vec<u8>>,
    crypto: Option<Arc<CryptoCore>>,
    algorithms: Algorithms,
+    #[allow(dead_code)] // Used in tests
    selected_algorithm: Option<&'static Algorithm>,
    failed_retries: usize
 }
@ -411,8 +416,7 @@ impl<P: Payload> InitState<P> {
    pub fn new(
        node_id: NodeId, payload: P, key_pair: Arc<Ed25519KeyPair>, trusted_keys: Arc<[Ed25519PublicKey]>,
        algorithms: Algorithms
-    ) -> Self
-    {
+    ) -> Self {
        let mut hash = [0; SALTED_NODE_ID_HASH_LEN];
        let rng = SystemRandom::new();
        rng.fill(&mut hash[0..4]).unwrap();
@ -502,7 +506,7 @@ impl<P: Payload> InitState<P> {
        if let Some(crypto) = &mut self.crypto {
            crypto.decrypt(data)?;
        }
-        Ok(P::read_from(Cursor::new(data.message()))?)
+        P::read_from(Cursor::new(data.message()))
    }

    fn check_salted_node_id_hash(&self, hash: &SaltedNodeIdHash, node_id: NodeId) -> bool {
@ -675,16 +679,22 @@ impl<P: Payload> InitState<P> {

    pub fn finish(self, buffer: &mut MsgBuffer) -> PeerCrypto {
        assert!(buffer.is_empty());
-        let rotation = if self.crypto.is_some() { Some(RotationState::new(!self.is_initiator, buffer)) } else { None };
+        if let Some(crypto) = self.crypto {
+            let rotation = RotationState::new(!self.is_initiator, buffer);
            if !buffer.is_empty() {
                buffer.prepend_byte(MESSAGE_TYPE_ROTATION);
            }
-        PeerCrypto {
-            algorithm: self.crypto.map(|c| c.algorithm()),
-            core: self.crypto,
+            PeerCrypto::Encrypted {
+                algorithm: crypto.algorithm(),
+                core: crypto,
                rotation,
                rotate_counter: 0,
-            last_init_message: self.last_message
+                last_init_message: self.last_message.unwrap()
+            }
+        } else {
+            PeerCrypto::Unencrypted {
+                last_init_message: self.last_message.unwrap()
+            }
        }
    }
 }
--- a/src/crypto/mod.rs
+++ b/src/crypto/mod.rs
@ -1,393 +1,11 @@
+// VpnCloud - Peer-to-Peer VPN
+// Copyright (C) 2015-2021  Dennis Schwerdel
+// This software is licensed under GPL-3 or newer (see LICENSE.md)
+
+mod common;
 mod core;
 mod init;
 mod rotate;

-use self::{core::test_speed, init::InitState, rotate::RotationState};
-pub use self::{
-    core::{CryptoCore, EXTRA_LEN, TAG_LEN},
-    init::{is_init_message, INIT_MESSAGE_FIRST_BYTE}
-};
-use crate::{
-    error::Error,
-    types::NodeId,
-    util::{from_base62, to_base62, MsgBuffer}
-};
-use ring::{
-    aead::{self, Algorithm, LessSafeKey, UnboundKey},
-    agreement::{EphemeralPrivateKey, UnparsedPublicKey},
-    pbkdf2,
-    rand::{SecureRandom, SystemRandom},
-    signature::{Ed25519KeyPair, KeyPair, ED25519_PUBLIC_KEY_LEN}
-};
-use smallvec::{smallvec, SmallVec};
-use std::{fmt::Debug, io::Read, num::NonZeroU32, sync::Arc, time::Duration};
-use thiserror::Error;
-
-
-const SALT: &[u8; 32] = b"vpncloudVPNCLOUDvpncl0udVpnCloud";
-
-const MESSAGE_TYPE_ROTATION: u8 = 0x10;
-
-pub type Ed25519PublicKey = [u8; ED25519_PUBLIC_KEY_LEN];
-pub type EcdhPublicKey = UnparsedPublicKey<SmallVec<[u8; 96]>>;
-pub type EcdhPrivateKey = EphemeralPrivateKey;
-pub type Key = SmallVec<[u8; 32]>;
-
-
-const DEFAULT_ALGORITHMS: [&str; 3] = ["AES128", "AES256", "CHACHA20"];
-
-#[cfg(test)]
-const SPEED_TEST_TIME: f32 = 0.02;
-#[cfg(not(test))]
-const SPEED_TEST_TIME: f32 = 0.1;
-
-const ROTATE_INTERVAL: usize = 120;
-
-
-pub trait Payload: Debug + PartialEq + Sized {
-    fn write_to(&self, buffer: &mut MsgBuffer);
-    fn read_from<R: Read>(r: R) -> Result<Self, Error>;
-}
-
-
-#[derive(Clone)]
-pub struct Algorithms {
-    pub algorithm_speeds: SmallVec<[(&'static Algorithm, f32); 3]>,
-    pub allow_unencrypted: bool
-}
-
-#[derive(Debug, Default, Deserialize, Serialize, Clone, PartialEq)]
-#[serde(rename_all = "kebab-case", deny_unknown_fields, default)]
-pub struct Config {
-    pub password: Option<String>,
-    pub private_key: Option<String>,
-    pub public_key: Option<String>,
-    pub trusted_keys: Vec<String>,
-    pub algorithms: Vec<String>
-}
-
-pub struct Crypto {
-    node_id: NodeId,
-    key_pair: Arc<Ed25519KeyPair>,
-    trusted_keys: Arc<[Ed25519PublicKey]>,
-    algorithms: Algorithms
-}
-
-impl Crypto {
-    pub fn new(node_id: NodeId, config: &Config) -> Result<Self, Error> {
-        let key_pair = if let Some(priv_key) = &config.private_key {
-            if let Some(pub_key) = &config.public_key {
-                Self::parse_keypair(priv_key, pub_key)?
-            } else {
-                Self::parse_private_key(priv_key)?
-            }
-        } else if let Some(password) = &config.password {
-            Self::keypair_from_password(password)
-        } else {
-            return Err(Error::InvalidConfig("Either private_key or password must be set"))
-        };
-        let mut trusted_keys = vec![];
-        for tn in &config.trusted_keys {
-            trusted_keys.push(Self::parse_public_key(tn)?);
-        }
-        if trusted_keys.is_empty() {
-            info!("Trusted keys not set, trusting only own public key");
-            let mut key = [0; ED25519_PUBLIC_KEY_LEN];
-            key.clone_from_slice(key_pair.public_key().as_ref());
-            trusted_keys.push(key);
-        }
-        let mut algos = Algorithms { algorithm_speeds: smallvec![], allow_unencrypted: false };
-        let algorithms = config.algorithms.iter().map(|a| a as &str).collect::<Vec<_>>();
-        let allowed = if algorithms.is_empty() { &DEFAULT_ALGORITHMS } else { &algorithms as &[&str] };
-        let duration = Duration::from_secs_f32(SPEED_TEST_TIME);
-        let mut speeds = Vec::new();
-        for name in allowed {
-            let algo = match &name.to_uppercase() as &str {
-                "UNENCRYPTED" | "NONE" | "PLAIN" => {
-                    algos.allow_unencrypted = true;
-                    warn!("Crypto settings allow unencrypted connections");
-                    continue
-                }
-                "AES128" | "AES128_GCM" | "AES_128" | "AES_128_GCM" => &aead::AES_128_GCM,
-                "AES256" | "AES256_GCM" | "AES_256" | "AES_256_GCM" => &aead::AES_256_GCM,
-                "CHACHA" | "CHACHA20" | "CHACHA20_POLY1305" => &aead::CHACHA20_POLY1305,
-                _ => return Err(Error::InvalidConfig("Unknown crypto method"))
-            };
-            let speed = test_speed(algo, &duration);
-            algos.algorithm_speeds.push((algo, speed as f32));
-            speeds.push((name, speed as f32));
-        }
-        if !speeds.is_empty() {
-            info!(
-                "Crypto speeds: {}",
-                speeds.into_iter().map(|(a, s)| format!("{}: {:.1} MiB/s", a, s)).collect::<Vec<_>>().join(", ")
-            );
-        }
-        Ok(Self {
-            node_id,
-            key_pair: Arc::new(key_pair),
-            trusted_keys: trusted_keys.into_boxed_slice().into(),
-            algorithms: algos
-        })
-    }
-
-    pub fn generate_keypair(password: Option<&str>) -> (String, String) {
-        let mut bytes = [0; 32];
-        match password {
-            None => {
-                let rng = SystemRandom::new();
-                rng.fill(&mut bytes).unwrap();
-            }
-            Some(password) => {
-                pbkdf2::derive(
-                    pbkdf2::PBKDF2_HMAC_SHA256,
-                    NonZeroU32::new(4096).unwrap(),
-                    SALT,
-                    password.as_bytes(),
-                    &mut bytes
-                );
-            }
-        }
-        let keypair = Ed25519KeyPair::from_seed_unchecked(&bytes).unwrap();
-        let privkey = to_base62(&bytes);
-        let pubkey = to_base62(keypair.public_key().as_ref());
-        (privkey, pubkey)
-    }
-
-    fn keypair_from_password(password: &str) -> Ed25519KeyPair {
-        let mut key = [0; 32];
-        pbkdf2::derive(pbkdf2::PBKDF2_HMAC_SHA256, NonZeroU32::new(4096).unwrap(), SALT, password.as_bytes(), &mut key);
-        Ed25519KeyPair::from_seed_unchecked(&key).unwrap()
-    }
-
-    fn parse_keypair(privkey: &str, pubkey: &str) -> Result<Ed25519KeyPair, Error> {
-        let privkey = from_base62(privkey).map_err(|_| Error::InvalidConfig("Failed to parse private key"))?;
-        let pubkey = from_base62(pubkey).map_err(|_| Error::InvalidConfig("Failed to parse public key"))?;
-        let keypair = Ed25519KeyPair::from_seed_and_public_key(&privkey, &pubkey)
-            .map_err(|_| Error::InvalidConfig("Keys rejected by crypto library"))?;
-        Ok(keypair)
-    }
-
-    fn parse_private_key(privkey: &str) -> Result<Ed25519KeyPair, Error> {
-        let privkey = from_base62(privkey).map_err(|_| Error::InvalidConfig("Failed to parse private key"))?;
-        let keypair = Ed25519KeyPair::from_seed_unchecked(&privkey)
-            .map_err(|_| Error::InvalidConfig("Key rejected by crypto library"))?;
-        Ok(keypair)
-    }
-
-    fn parse_public_key(pubkey: &str) -> Result<Ed25519PublicKey, Error> {
-        let pubkey = from_base62(pubkey).map_err(|_| Error::InvalidConfig("Failed to parse public key"))?;
-        if pubkey.len() != ED25519_PUBLIC_KEY_LEN {
-            return Err(Error::InvalidConfig("Failed to parse public key"))
-        }
-        let mut result = [0; ED25519_PUBLIC_KEY_LEN];
-        result.clone_from_slice(&pubkey);
-        Ok(result)
-    }
-
-    pub fn peer_instance<P: Payload>(&self, payload: P) -> InitState<P> {
-        InitState::new(self.node_id, payload, self.key_pair.clone(), self.trusted_keys.clone(), self.algorithms.clone())
-    }
-}
-
-
-#[derive(Debug, PartialEq)]
-pub enum MessageResult {
-    Message(u8),
-    Reply,
-    None
-}
-
-
-// TODO: completely rewrite
-// PeerCrypto is only for initialized crypto
-// Init is consumed and generates PeerCrypto
-pub struct PeerCrypto {
-    #[allow(dead_code)]
-    last_init_message: Option<Vec<u8>>,
-    algorithm: Option<&'static Algorithm>,
-    rotation: Option<RotationState>,
-    core: Option<Arc<CryptoCore>>,
-    rotate_counter: usize
-}
-
-impl PeerCrypto {
-    pub fn algorithm_name(&self) -> &'static str {
-        if let Some(algo) = self.algorithm {
-            if algo == &aead::CHACHA20_POLY1305 {
-                "CHACHA20"
-            } else if algo == &aead::AES_128_GCM {
-                "AES128"
-            } else if algo == &aead::AES_256_GCM {
-                "AES256"
-            } else {
-                unreachable!()
-            }
-        } else {
-            "PLAIN"
-        }
-    }
-
-    fn handle_init_message(&mut self, buffer: &mut MsgBuffer) -> Result<MessageResult, Error> {
-        // TODO: parse message stage
-        // TODO: depending on stage resend last message
-        Ok(MessageResult::None)
-    }
-
-    fn handle_rotate_message(&mut self, data: &[u8]) -> Result<(), Error> {
-        if let Some(rotation) = &mut self.rotation {
-            if let Some(rot) = rotation.handle_message(data)? {
-                let algo = self.algorithm.unwrap();
-                let key = LessSafeKey::new(UnboundKey::new(algo, &rot.key[..algo.key_len()]).unwrap());
-                self.core.unwrap().rotate_key(key, rot.id, rot.use_for_sending);
-            }
-        }
-        Ok(())
-    }
-
-    fn encrypt_message(&mut self, buffer: &mut MsgBuffer) {
-        if let Some(core) = &mut self.core {
-            core.encrypt(buffer)
-        }
-    }
-
-    fn decrypt_message(&mut self, buffer: &mut MsgBuffer) -> Result<(), Error> {
-        // HOT PATH
-        if let Some(core) = &mut self.core {
-            core.decrypt(buffer)
-        } else {
-            Ok(())
-        }
-    }
-
-    pub fn handle_message(&mut self, buffer: &mut MsgBuffer) -> Result<MessageResult, Error> {
-        // HOT PATH
-        if buffer.is_empty() {
-            return Err(Error::InvalidCryptoState("No message in buffer"))
-        }
-        if is_init_message(buffer.buffer()) {
-            // COLD PATH
-            debug!("Received init message");
-            self.handle_init_message(buffer)
-        } else {
-            // HOT PATH
-            debug!("Received encrypted message");
-            self.decrypt_message(buffer)?;
-            let msg_type = buffer.take_prefix();
-            if msg_type == MESSAGE_TYPE_ROTATION {
-                // COLD PATH
-                debug!("Received rotation message");
-                self.handle_rotate_message(buffer.buffer())?;
-                buffer.clear();
-                Ok(MessageResult::None)
-            } else {
-                Ok(MessageResult::Message(msg_type))
-            }
-        }
-    }
-
-    pub fn send_message(&mut self, type_: u8, buffer: &mut MsgBuffer) {
-        // HOT PATH
-        assert_ne!(type_, MESSAGE_TYPE_ROTATION);
-        buffer.prepend_byte(type_);
-        self.encrypt_message(buffer);
-    }
-
-    pub fn every_second(&mut self, out: &mut MsgBuffer) -> MessageResult {
-        out.clear();
-        if let Some(ref mut core) = self.core {
-            core.every_second()
-        }
-        if let Some(ref mut rotate) = self.rotation {
-            self.rotate_counter += 1;
-            if self.rotate_counter >= ROTATE_INTERVAL {
-                self.rotate_counter = 0;
-                if let Some(rot) = rotate.cycle(out) {
-                    let algo = self.algorithm.unwrap();
-                    let key = LessSafeKey::new(UnboundKey::new(algo, &rot.key[..algo.key_len()]).unwrap());
-                    self.core.unwrap().rotate_key(key, rot.id, rot.use_for_sending);
-                }
-                if !out.is_empty() {
-                    out.prepend_byte(MESSAGE_TYPE_ROTATION);
-                    self.encrypt_message(out);
-                    return MessageResult::Reply
-                }
-            }
-        }
-        MessageResult::None
-    }
-}
-
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    use crate::types::NODE_ID_BYTES;
-
-    fn create_node(config: &Config) -> PeerCrypto<Vec<u8>> {
-        let rng = SystemRandom::new();
-        let mut node_id = [0; NODE_ID_BYTES];
-        rng.fill(&mut node_id).unwrap();
-        let crypto = Crypto::new(node_id, config).unwrap();
-        crypto.peer_instance(vec![])
-    }
-
-    #[test]
-    fn normal() {
-        let config = Config { password: Some("test".to_string()), ..Default::default() };
-        let mut node1 = create_node(&config);
-        let mut node2 = create_node(&config);
-        let mut msg = MsgBuffer::new(16);
-
-        node1.initialize(&mut msg).unwrap();
-        assert!(!msg.is_empty());
-
-        debug!("Node1 -> Node2");
-        let res = node2.handle_message(&mut msg).unwrap();
-        assert_eq!(res, MessageResult::Reply);
-        assert!(!msg.is_empty());
-
-        debug!("Node1 <- Node2");
-        let res = node1.handle_message(&mut msg).unwrap();
-        assert_eq!(res, MessageResult::InitializedWithReply(vec![]));
-        assert!(!msg.is_empty());
-
-        debug!("Node1 -> Node2");
-        let res = node2.handle_message(&mut msg).unwrap();
-        assert_eq!(res, MessageResult::InitializedWithReply(vec![]));
-        assert!(!msg.is_empty());
-
-        debug!("Node1 <- Node2");
-        let res = node1.handle_message(&mut msg).unwrap();
-        assert_eq!(res, MessageResult::None);
-        assert!(msg.is_empty());
-
-        let mut buffer = MsgBuffer::new(16);
-        let rng = SystemRandom::new();
-        buffer.set_length(1000);
-        rng.fill(buffer.message_mut()).unwrap();
-        for _ in 0..1000 {
-            node1.send_message(1, &mut buffer).unwrap();
-            let res = node2.handle_message(&mut buffer).unwrap();
-            assert_eq!(res, MessageResult::Message(1));
-
-            match node1.every_second(&mut msg).unwrap() {
-                MessageResult::None => (),
-                MessageResult::Reply => {
-                    let res = node2.handle_message(&mut msg).unwrap();
-                    assert_eq!(res, MessageResult::None);
-                }
-                other => assert_eq!(other, MessageResult::None)
-            }
-            match node2.every_second(&mut msg).unwrap() {
-                MessageResult::None => (),
-                MessageResult::Reply => {
-                    let res = node1.handle_message(&mut msg).unwrap();
-                    assert_eq!(res, MessageResult::None);
-                }
-                other => assert_eq!(other, MessageResult::None)
-            }
-        }
-    }
-}
+pub use common::*;
+pub use self::core::{EXTRA_LEN, TAG_LEN};
--- a/src/crypto/rotate.rs
+++ b/src/crypto/rotate.rs
@ -1,3 +1,7 @@
+// VpnCloud - Peer-to-Peer VPN
+// Copyright (C) 2015-2021  Dennis Schwerdel
+// This software is licensed under GPL-3 or newer (see LICENSE.md)
+
 // This module implements a turn based key rotation.
 //
 // The main idea is that both peers periodically create ecdh key pairs and exchange their public keys to create
@ -25,7 +29,8 @@
 //
 // The whole communication is sent via the crypto stream and is therefore encrypted and protected against tampering.

-use super::{Error, Key, MsgBuffer};
+use super::Key;
+use crate::{error::Error, util::MsgBuffer};
 use byteorder::{NetworkEndian, ReadBytesExt, WriteBytesExt};
 use ring::{
    agreement::{agree_ephemeral, EphemeralPrivateKey, UnparsedPublicKey, X25519},
--- a/src/device.rs
+++ b/src/device.rs
@ -1,5 +1,5 @@
 // VpnCloud - Peer-to-Peer VPN
-// Copyright (C) 2015-2020  Dennis Schwerdel
+// Copyright (C) 2015-2021  Dennis Schwerdel
 // This software is licensed under GPL-3 or newer (see LICENSE.md)

 use std::{
@ -344,7 +344,7 @@ impl Device for MockDevice {
    }

    fn write(&mut self, buffer: &mut MsgBuffer) -> Result<(), Error> {
-        self.outbound.push_back(buffer.message().to_owned());
+        self.outbound.push_back(buffer.message().into());
        Ok(())
    }

@ -355,7 +355,7 @@ impl Device for MockDevice {

 impl Default for MockDevice {
    fn default() -> Self {
-        Self { outbound: VecDeque::new(), inbound: VecDeque::new() }
+        Self { outbound: VecDeque::with_capacity(10), inbound: VecDeque::with_capacity(10) }
    }
 }

--- a/src/engine/mod.rs
+++ b/src/engine/mod.rs
@ -1,5 +1,5 @@
 // VpnCloud - Peer-to-Peer VPN
-// Copyright (C) 2015-2020  Dennis Schwerdel
+// Copyright (C) 2015-2021  Dennis Schwerdel
 // This software is licensed under GPL-3 or newer (see LICENSE.md)

 mod device_thread;
@ -53,6 +53,7 @@ const SPACE_BEFORE: usize = 100;

 struct PeerData {
    addrs: AddrList,
+    #[allow(dead_code)] //TODO: export in status
    last_seen: Time,
    timeout: Time,
    peer_timeout: u16,
@ -79,7 +80,7 @@ pub struct GenericCloud<D: Device, P: Protocol, S: Socket, TS: TimeSource> {
    peers: HashMap<SocketAddr, PeerData, Hash>,
    reconnect_peers: SmallVec<[ReconnectEntry; 3]>,
    own_addresses: AddrList,
-    pending_inits: HashMap<SocketAddr, PeerCrypto<NodeInfo>, Hash>,
+    pending_inits: HashMap<SocketAddr, InitState<NodeInfo>, Hash>,
    table: ClaimTable<TS>,
    socket: S,
    device: D,
@ -103,11 +104,7 @@ pub struct GenericCloud<D: Device, P: Protocol, S: Socket, TS: TimeSource> {

 impl<D: Device, P: Protocol, S: Socket, TS: TimeSource> GenericCloud<D, P, S, TS> {
    #[allow(clippy::too_many_arguments)]
-    pub fn new(config: &Config, device: D, port_forwarding: Option<PortForwarding>, stats_file: Option<File>) -> Self {
-        let socket = match S::listen(config.listen) {
-            Ok(socket) => socket,
-            Err(err) => fail!("Failed to open socket {}: {}", config.listen, err)
-        };
+    pub fn new(config: &Config, socket: S, device: D, port_forwarding: Option<PortForwarding>, stats_file: Option<File>) -> Self {
        let (learning, broadcast) = match config.mode {
            Mode::Normal => {
                match config.device_type {
@ -235,6 +232,7 @@ impl<D: Device, P: Protocol, S: Socket, TS: TimeSource> GenericCloud<D, P, S, TS
            self.own_addresses.push(pfw.get_internal_ip().into());
            self.own_addresses.push(pfw.get_external_ip().into());
        }
+        debug!("Own addresses: {:?}", self.own_addresses);
        // TODO: detect address changes and call event
        Ok(())
    }
@ -249,12 +247,8 @@ impl<D: Device, P: Protocol, S: Socket, TS: TimeSource> GenericCloud<D, P, S, TS
    ///
    /// This method adds a peer to the list of nodes to reconnect to. A periodic task will try to
    /// connect to the peer if it is not already connected.
-    pub fn add_reconnect_peer(&mut self, mut add: String) {
+    pub fn add_reconnect_peer(&mut self, add: String) {
        let now = TS::now();
-        if add.find(':').unwrap_or(0) <= add.find(']').unwrap_or(0) {
-            // : not present or only in IPv6 address
-            add = format!("{}:{}", add, DEFAULT_PORT)
-        }
        let resolved = match resolve(&add as &str) {
            Ok(addrs) => addrs,
            Err(err) => {
@ -472,7 +466,6 @@ impl<D: Device, P: Protocol, S: Socket, TS: TimeSource> GenericCloud<D, P, S, TS
            self.next_stats_out = now + STATS_INTERVAL;
            self.traffic.period(Some(5));
        }
-        // TODO: every 5 minutes: EVENT periodic
        if let Some(peers) = self.beacon_serializer.get_cmd_results() {
            debug!("Loaded beacon with peers: {:?}", peers);
            for peer in peers {
@ -921,7 +914,7 @@ impl<D: Device, P: Protocol, S: Socket, TS: TimeSource> GenericCloud<D, P, S, TS
    /// Also, this method will call `housekeep` every second.
    pub fn run(&mut self) {
        let ctrlc = CtrlC::new();
-        let waiter = try_fail!(WaitImpl::new(&self.socket, &self.device, 1000), "Failed to setup poll: {}");
+        let waiter = try_fail!(WaitImpl::new(self.socket.as_raw_fd(), self.device.as_raw_fd(), 1000), "Failed to setup poll: {}");
        let mut buffer = MsgBuffer::new(SPACE_BEFORE);
        let mut poll_error = false;
        self.config.call_hook("vpn_started", vec![("IFNAME", self.device.ifname())], true);
--- a/src/engine/shared.rs
+++ b/src/engine/shared.rs
@ -30,7 +30,7 @@ impl SharedPeerCrypto {
        }
    }

-    pub fn for_each(&mut self, mut callback: impl FnMut(SocketAddr, &mut PeerCrypto<NodeInfo>) -> Result<(), Error>) -> Result<(), Error> {
+    pub fn for_each(&mut self, mut callback: impl FnMut(SocketAddr, &mut CryptoCore) -> Result<(), Error>) -> Result<(), Error> {
        let mut peers = self.peers.lock();
        for (k, v) in peers.iter_mut() {
            callback(*k, v)?
--- a/src/error.rs
+++ b/src/error.rs
@ -1,3 +1,7 @@
+// VpnCloud - Peer-to-Peer VPN
+// Copyright (C) 2015-2021  Dennis Schwerdel
+// This software is licensed under GPL-3 or newer (see LICENSE.md)
+
 use thiserror::Error;

 use std::io;
--- a/src/main.rs
+++ b/src/main.rs
@ -1,5 +1,5 @@
 // VpnCloud - Peer-to-Peer VPN
-// Copyright (C) 2015-2020  Dennis Schwerdel
+// Copyright (C) 2015-2021  Dennis Schwerdel
 // This software is licensed under GPL-3 or newer (see LICENSE.md)

 #[macro_use] extern crate log;
@ -27,6 +27,7 @@ pub mod port_forwarding;
 pub mod table;
 pub mod traffic;
 pub mod types;
+#[cfg(feature = "websocket")] pub mod wsproxy;

 use structopt::StructOpt;

@ -36,7 +37,7 @@ use std::{
    net::{Ipv4Addr, UdpSocket},
    os::unix::fs::PermissionsExt,
    path::Path,
-    process::Command,
+    process,
    str::FromStr,
    sync::Mutex,
    thread
@ -44,15 +45,17 @@ use std::{

 use crate::{
    engine::GenericCloud,
-    config::{Args, Config},
+    config::{Args, Command, Config, DEFAULT_PORT},
    crypto::Crypto,
    device::{Device, TunTapDevice, Type},
+    net::Socket,
    oldconfig::OldConfigFile,
    payload::Protocol,
-    port_forwarding::PortForwarding,
-    util::SystemTimeSource
+    util::SystemTimeSource,
 };

+#[cfg(feature = "websocket")]
+use crate::wsproxy::ProxyConnection;

 struct DualLogger {
    file: Option<Mutex<File>>
@ -102,7 +105,7 @@ impl log::Log for DualLogger {
 }

 fn run_script(script: &str, ifname: &str) {
-    let mut cmd = Command::new("sh");
+    let mut cmd = process::Command::new("sh");
    cmd.arg("-c").arg(&script).env("IFNAME", ifname);
    debug!("Running script: {:?}", cmd);
    match cmd.status() {
@ -161,11 +164,10 @@ fn setup_device(config: &Config) -> TunTapDevice {
    device
 }

-
 #[allow(clippy::cognitive_complexity)]
-fn run<P: Protocol>(config: Config) {
+fn run<P: Protocol, S: Socket>(config: Config, socket: S) {
    let device = setup_device(&config);
-    let port_forwarding = if config.port_forwarding { PortForwarding::new(config.listen.port()) } else { None };
+    let port_forwarding = if config.port_forwarding { socket.create_port_forwarding() } else { None };
    let stats_file = match config.stats_file {
        None => None,
        Some(ref name) => {
@ -182,8 +184,12 @@ fn run<P: Protocol>(config: Config) {
        }
    };
    let mut cloud =
-        GenericCloud::<TunTapDevice, P, UdpSocket, SystemTimeSource>::new(&config, device, port_forwarding, stats_file);
-    for addr in config.peers {
+        GenericCloud::<TunTapDevice, P, S, SystemTimeSource>::new(&config, socket, device, port_forwarding, stats_file);
+    for mut addr in config.peers {
+        if addr.find(':').unwrap_or(0) <= addr.find(']').unwrap_or(0) {
+            // : not present or only in IPv6 address
+            addr = format!("{}:{}", addr, DEFAULT_PORT)
+        }
        try_fail!(cloud.connect(&addr as &str), "Failed to send message to {}: {}", &addr);
        cloud.add_reconnect_peer(addr);
    }
@ -225,18 +231,6 @@ fn main() {
        println!("VpnCloud v{}", env!("CARGO_PKG_VERSION"));
        return
    }
-    if args.genkey {
-        let (privkey, pubkey) = Crypto::generate_keypair(args.password.as_deref());
-        println!("Private key: {}\nPublic key: {}\n", privkey, pubkey);
-        println!(
-            "Attention: Keep the private key secret and use only the public key on other nodes to establish trust."
-        );
-        return
-    }
-    if let Some(shell) = args.completion {
-        Args::clap().gen_completions_to(env!("CARGO_PKG_NAME"), shell, &mut io::stdout());
-        return
-    }
    let logger = try_fail!(DualLogger::new(args.log_file.as_ref()), "Failed to open logfile: {}");
    log::set_boxed_logger(Box::new(logger)).unwrap();
    assert!(!args.verbose || !args.quiet);
@ -247,23 +241,44 @@ fn main() {
    } else {
        log::LevelFilter::Info
    });
-    if args.migrate_config {
-        let file = args.config.unwrap();
+    if let Some(cmd) = args.cmd {
+        match cmd {
+            Command::GenKey { password } => {
+                let (privkey, pubkey) = Crypto::generate_keypair(password.as_deref());
+                println!("Private key: {}\nPublic key: {}\n", privkey, pubkey);
+                println!(
+                    "Attention: Keep the private key secret and use only the public key on other nodes to establish trust."
+                );
+            }
+            Command::MigrateConfig { config_file } => {
                info!("Trying to convert from old config format");
-        let f = try_fail!(File::open(&file), "Failed to open config file: {:?}");
+                let f = try_fail!(File::open(&config_file), "Failed to open config file: {:?}");
                let config_file_old: OldConfigFile =
                    try_fail!(serde_yaml::from_reader(f), "Config file not valid for version 1: {:?}");
                let new_config = config_file_old.convert();
                info!("Successfully converted from old format");
-        info!("Renaming original file to {}.orig", file);
-        try_fail!(fs::rename(&file, format!("{}.orig", file)), "Failed to rename original file: {:?}");
-        info!("Writing new config back into {}", file);
-        let f = try_fail!(File::create(&file), "Failed to open config file: {:?}");
+                info!("Renaming original file to {}.orig", config_file);
                try_fail!(
-            fs::set_permissions(&file, fs::Permissions::from_mode(0o600)),
+                    fs::rename(&config_file, format!("{}.orig", config_file)),
+                    "Failed to rename original file: {:?}"
+                );
+                info!("Writing new config back into {}", config_file);
+                let f = try_fail!(File::create(&config_file), "Failed to open config file: {:?}");
+                try_fail!(
+                    fs::set_permissions(&config_file, fs::Permissions::from_mode(0o600)),
                    "Failed to set permissions on file: {:?}"
                );
                try_fail!(serde_yaml::to_writer(f, &new_config), "Failed to write converted config: {:?}");
+            }
+            Command::Completion { shell } => {
+                Args::clap().gen_completions_to(env!("CARGO_PKG_NAME"), shell, &mut io::stdout());
+                return
+            }
+            #[cfg(feature = "websocket")]
+            Command::WsProxy { listen } => {
+                try_fail!(wsproxy::run_proxy(&listen), "Failed to run websocket proxy: {:?}");
+            }
+        }
        return
    }
    let mut config = Config::default();
@ -287,8 +302,22 @@ fn main() {
    }
    config.merge_args(args);
    debug!("Config: {:?}", config);
+    if config.crypto.password.is_none() && config.crypto.private_key.is_none() {
+        error!("Either password or private key must be set in config or given as parameter");
+        return
+    }
+    #[cfg(feature = "websocket")]
+    if config.listen.starts_with("ws://") {
+        let socket = try_fail!(ProxyConnection::listen(&config.listen), "Failed to open socket {}: {}", config.listen);
        match config.device_type {
-        Type::Tap => run::<payload::Frame>(config),
-        Type::Tun => run::<payload::Packet>(config)
+            Type::Tap => run::<payload::Frame, _>(config, socket),
+            Type::Tun => run::<payload::Packet, _>(config, socket)
+        }
+        return        
+    }
+    let socket = try_fail!(UdpSocket::listen(&config.listen), "Failed to open socket {}: {}", config.listen);
+    match config.device_type {
+        Type::Tap => run::<payload::Frame, _>(config, socket),
+        Type::Tun => run::<payload::Packet, _>(config, socket)
    }
 }
--- a/src/messages.rs
+++ b/src/messages.rs
@ -1,5 +1,5 @@
 // VpnCloud - Peer-to-Peer VPN
-// Copyright (C) 2015-2020  Dennis Schwerdel
+// Copyright (C) 2015-2021  Dennis Schwerdel
 // This software is licensed under GPL-3 or newer (see LICENSE.md)

 use crate::{
--- a/src/net.rs
+++ b/src/net.rs
@ -1,16 +1,17 @@
 // VpnCloud - Peer-to-Peer VPN
-// Copyright (C) 2015-2020  Dennis Schwerdel
+// Copyright (C) 2015-2021  Dennis Schwerdel
 // This software is licensed under GPL-3 or newer (see LICENSE.md)

 use std::{
    collections::{HashMap, VecDeque},
    io::{self, ErrorKind},
-    net::{IpAddr, SocketAddr, UdpSocket},
+    net::{IpAddr, SocketAddr, UdpSocket, Ipv6Addr},
    os::unix::io::{AsRawFd, RawFd},
    sync::atomic::{AtomicBool, Ordering}
 };

 use super::util::{MockTimeSource, MsgBuffer, Time, TimeSource};
+use crate::port_forwarding::PortForwarding;

 pub fn mapped_addr(addr: SocketAddr) -> SocketAddr {
    // HOT PATH
@ -20,16 +21,35 @@ pub fn mapped_addr(addr: SocketAddr) -> SocketAddr {
    }
 }

+pub fn get_ip() -> IpAddr {
+    let s = UdpSocket::bind("[::]:0").unwrap();
+    s.connect("8.8.8.8:0").unwrap();
+    s.local_addr().unwrap().ip()
+}

 pub trait Socket: AsRawFd + Sized {
-    fn listen(addr: SocketAddr) -> Result<Self, io::Error>;
+    fn listen(addr: &str) -> Result<Self, io::Error>;
    fn receive(&mut self, buffer: &mut MsgBuffer) -> Result<SocketAddr, io::Error>;
    fn send(&mut self, data: &[u8], addr: SocketAddr) -> Result<usize, io::Error>;
    fn address(&self) -> Result<SocketAddr, io::Error>;
+    fn create_port_forwarding(&self) -> Option<PortForwarding>;
+}
+
+pub fn parse_listen(addr: &str) -> SocketAddr {
+    if let Some(addr) = addr.strip_prefix("*:") {
+        let port = try_fail!(addr.parse::<u16>(), "Invalid port: {}");
+        SocketAddr::new(IpAddr::V6(Ipv6Addr::UNSPECIFIED), port)
+    } else if addr.contains(':') {
+        try_fail!(addr.parse::<SocketAddr>(), "Invalid address: {}: {}", addr)
+    } else {
+        let port = try_fail!(addr.parse::<u16>(), "Invalid port: {}");
+        SocketAddr::new(IpAddr::V6(Ipv6Addr::UNSPECIFIED), port)
+    }
 }

 impl Socket for UdpSocket {
-    fn listen(addr: SocketAddr) -> Result<Self, io::Error> {
+    fn listen(addr: &str) -> Result<Self, io::Error> {
+        let addr = parse_listen(addr);
        UdpSocket::bind(addr)
    }

@ -45,7 +65,13 @@ impl Socket for UdpSocket {
    }

    fn address(&self) -> Result<SocketAddr, io::Error> {
-        self.local_addr()
+        let mut addr = self.local_addr()?;
+        addr.set_ip(get_ip());
+        Ok(addr)
+    }
+
+    fn create_port_forwarding(&self) -> Option<PortForwarding> {
+        PortForwarding::new(self.address().unwrap().port())
    }
 }

@ -67,8 +93,8 @@ impl MockSocket {
            nat: Self::get_nat(),
            nat_peers: HashMap::new(),
            address,
-            outbound: VecDeque::new(),
-            inbound: VecDeque::new()
+            outbound: VecDeque::with_capacity(10),
+            inbound: VecDeque::with_capacity(10)
        }
    }

@ -107,8 +133,8 @@ impl AsRawFd for MockSocket {
 }

 impl Socket for MockSocket {
-    fn listen(addr: SocketAddr) -> Result<Self, io::Error> {
-        Ok(Self::new(addr))
+    fn listen(addr: &str) -> Result<Self, io::Error> {
+        Ok(Self::new(parse_listen(addr)))
    }

    fn receive(&mut self, buffer: &mut MsgBuffer) -> Result<SocketAddr, io::Error> {
@ -123,7 +149,7 @@ impl Socket for MockSocket {
    }

    fn send(&mut self, data: &[u8], addr: SocketAddr) -> Result<usize, io::Error> {
-        self.outbound.push_back((addr, data.to_owned()));
+        self.outbound.push_back((addr, data.into()));
        if self.nat {
            self.nat_peers.insert(addr, MockTimeSource::now() + 300);
        }
@ -133,4 +159,23 @@ impl Socket for MockSocket {
    fn address(&self) -> Result<SocketAddr, io::Error> {
        Ok(self.address)
    }
+
+    fn create_port_forwarding(&self) -> Option<PortForwarding> {
+        None
+    }
+}
+
+#[cfg(feature = "bench")]
+mod bench {
+    use std::net::{Ipv4Addr, SocketAddrV4, UdpSocket};
+    use test::Bencher;
+
+    #[bench]
+    fn udp_send(b: &mut Bencher) {
+        let sock = UdpSocket::bind("127.0.0.1:0").unwrap();
+        let data = [0; 1400];
+        let addr = SocketAddrV4::new(Ipv4Addr::new(127, 0, 0, 1), 1);
+        b.iter(|| sock.send_to(&data, &addr).unwrap());
+        b.bytes = 1400;
+    }
 }
--- a/src/oldconfig.rs
+++ b/src/oldconfig.rs
@ -1,3 +1,7 @@
+// VpnCloud - Peer-to-Peer VPN
+// Copyright (C) 2015-2021  Dennis Schwerdel
+// This software is licensed under GPL-3 or newer (see LICENSE.md)
+
 use super::{device::Type, types::Mode, util::Duration};
 use crate::config::{ConfigFile, ConfigFileBeacon, ConfigFileDevice, ConfigFileStatsd, CryptoConfig};
 use std::collections::HashMap;
--- a/src/payload.rs
+++ b/src/payload.rs
@ -1,5 +1,5 @@
 // VpnCloud - Peer-to-Peer VPN
-// Copyright (C) 2015-2020  Dennis Schwerdel
+// Copyright (C) 2015-2021  Dennis Schwerdel
 // This software is licensed under GPL-3 or newer (see LICENSE.md)

 use crate::{error::Error, types::Address};
--- a/src/poll/epoll.rs
+++ b/src/poll/epoll.rs
@ -1,12 +1,10 @@
 // VpnCloud - Peer-to-Peer VPN
-// Copyright (C) 2015-2020  Dennis Schwerdel
+// Copyright (C) 2015-2021  Dennis Schwerdel
 // This software is licensed under GPL-3 or newer (see LICENSE.md)

-use crate::device::Device;
 use std::{io, os::unix::io::RawFd};

 use super::WaitResult;
-use crate::net::Socket;

 pub struct EpollWait {
    poll_fd: RawFd,
@ -17,21 +15,21 @@ pub struct EpollWait {
 }

 impl EpollWait {
-    pub fn new<S: Socket>(socket: &S, device: &dyn Device, timeout: u32) -> io::Result<Self> {
+    pub fn new(socket: RawFd, device: RawFd, timeout: u32) -> io::Result<Self> {
        Self::create(socket, device, timeout, libc::EPOLLIN as u32)
    }

-    pub fn testing<S: Socket>(socket: &S, device: &dyn Device, timeout: u32) -> io::Result<Self> {
+    pub fn testing(socket: RawFd, device: RawFd, timeout: u32) -> io::Result<Self> {
        Self::create(socket, device, timeout, (libc::EPOLLIN | libc::EPOLLOUT) as u32)
    }

-    fn create<S: Socket>(socket: &S, device: &dyn Device, timeout: u32, flags: u32) -> io::Result<Self> {
+    fn create(socket: RawFd, device: RawFd, timeout: u32, flags: u32) -> io::Result<Self> {
        let mut event = libc::epoll_event { u64: 0, events: 0 };
        let poll_fd = unsafe { libc::epoll_create(3) };
        if poll_fd == -1 {
            return Err(io::Error::last_os_error())
        }
-        for fd in &[socket.as_raw_fd(), device.as_raw_fd()] {
+        for fd in &[socket, device] {
            event.u64 = *fd as u64;
            event.events = flags;
            let res = unsafe { libc::epoll_ctl(poll_fd, libc::EPOLL_CTL_ADD, *fd, &mut event) };
@ -39,7 +37,7 @@ impl EpollWait {
                return Err(io::Error::last_os_error())
            }
        }
-        Ok(Self { poll_fd, event, socket: socket.as_raw_fd(), device: device.as_raw_fd(), timeout })
+        Ok(Self { poll_fd, event, socket, device, timeout })
    }
 }

--- a/src/poll/mod.rs
+++ b/src/poll/mod.rs
@ -1,5 +1,5 @@
 // VpnCloud - Peer-to-Peer VPN
-// Copyright (C) 2015-2020  Dennis Schwerdel
+// Copyright (C) 2015-2021  Dennis Schwerdel
 // This software is licensed under GPL-3 or newer (see LICENSE.md)

 #[cfg(any(target_os = "linux", target_os = "android"))]
--- a/src/port_forwarding.rs
+++ b/src/port_forwarding.rs
@ -1,5 +1,5 @@
 // VpnCloud - Peer-to-Peer VPN
-// Copyright (C) 2015-2020  Dennis Schwerdel
+// Copyright (C) 2015-2021  Dennis Schwerdel
 // This software is licensed under GPL-3 or newer (see LICENSE.md)

 #[cfg(feature = "nat")]
--- a/src/table.rs
+++ b/src/table.rs
@ -1,5 +1,5 @@
 // VpnCloud - Peer-to-Peer VPN
-// Copyright (C) 2015-2020  Dennis Schwerdel
+// Copyright (C) 2015-2021  Dennis Schwerdel
 // This software is licensed under GPL-3 or newer (see LICENSE.md)

 use fnv::FnvHasher;
--- a/src/tests/common.rs
+++ b/src/tests/common.rs
@ -0,0 +1,214 @@
+// VpnCloud - Peer-to-Peer VPN
+// Copyright (C) 2015-2021  Dennis Schwerdel
+// This software is licensed under GPL-3 or newer (see LICENSE.md)
+
+use std::{
+    collections::{HashMap, VecDeque},
+    io::Write,
+    net::SocketAddr,
+    sync::{
+        atomic::{AtomicUsize, Ordering},
+        Once
+    }
+};
+
+pub use crate::{
+    config::{Config, CryptoConfig},
+    device::{MockDevice, Type},
+    engine::GenericCloud,
+    net::MockSocket,
+    payload::{Frame, Packet, Protocol},
+    types::Range,
+    util::{MockTimeSource, Time, TimeSource}
+};
+
+
+static INIT_LOGGER: Once = Once::new();
+
+pub fn init_debug_logger() {
+    INIT_LOGGER.call_once(|| {
+        log::set_boxed_logger(Box::new(DebugLogger)).unwrap();
+        log::set_max_level(log::LevelFilter::Debug);
+    })
+}
+
+static CURRENT_NODE: AtomicUsize = AtomicUsize::new(0);
+
+struct DebugLogger;
+
+impl DebugLogger {
+    pub fn set_node(node: usize) {
+        CURRENT_NODE.store(node, Ordering::SeqCst);
+    }
+}
+
+impl log::Log for DebugLogger {
+    #[inline]
+    fn enabled(&self, _metadata: &log::Metadata) -> bool {
+        true
+    }
+
+    #[inline]
+    fn log(&self, record: &log::Record) {
+        if self.enabled(record.metadata()) {
+            eprintln!("Node {} - {} - {}", CURRENT_NODE.load(Ordering::SeqCst), record.level(), record.args());
+        }
+    }
+
+    #[inline]
+    fn flush(&self) {
+        std::io::stderr().flush().expect("Failed to flush")
+    }
+}
+
+
+type TestNode<P> = GenericCloud<MockDevice, P, MockSocket, MockTimeSource>;
+
+pub struct Simulator<P: Protocol> {
+    next_port: u16,
+    nodes: HashMap<SocketAddr, TestNode<P>>,
+    messages: VecDeque<(SocketAddr, SocketAddr, Vec<u8>)>
+}
+
+pub type TapSimulator = Simulator<Frame>;
+#[allow(dead_code)]
+pub type TunSimulator = Simulator<Packet>;
+
+
+impl<P: Protocol> Simulator<P> {
+    pub fn new() -> Self {
+        init_debug_logger();
+        MockTimeSource::set_time(0);
+        Self { next_port: 1, nodes: HashMap::default(), messages: VecDeque::default() }
+    }
+
+    pub fn add_node(&mut self, nat: bool, config: &Config) -> SocketAddr {
+        let mut config = config.clone();
+        MockSocket::set_nat(nat);
+        config.listen = format!("[::]:{}", self.next_port);
+        let addr = config.listen.parse::<SocketAddr>().unwrap();
+        if config.crypto.password.is_none() && config.crypto.private_key.is_none() {
+            config.crypto.password = Some("test123".to_string())
+        }
+        DebugLogger::set_node(self.next_port as usize);
+        self.next_port += 1;
+        let node = TestNode::new(&config, MockSocket::new(addr), MockDevice::new(), None, None);
+        DebugLogger::set_node(0);
+        self.nodes.insert(addr, node);
+        addr
+    }
+
+    #[allow(dead_code)]
+    pub fn get_node(&mut self, addr: SocketAddr) -> &mut TestNode<P> {
+        let node = self.nodes.get_mut(&addr).unwrap();
+        DebugLogger::set_node(node.get_num());
+        node
+    }
+
+    pub fn simulate_next_message(&mut self) {
+        if let Some((src, dst, data)) = self.messages.pop_front() {
+            if let Some(node) = self.nodes.get_mut(&dst) {
+                if node.socket().put_inbound(src, data) {
+                    DebugLogger::set_node(node.get_num());
+                    node.trigger_socket_event();
+                    DebugLogger::set_node(0);
+                    let sock = node.socket();
+                    let src = dst;
+                    while let Some((dst, data)) = sock.pop_outbound() {
+                        self.messages.push_back((src, dst, data));
+                    }
+                }
+            } else {
+                warn!("Message to unknown node {}", dst);
+            }
+        }
+    }
+
+    pub fn simulate_all_messages(&mut self) {
+        while !self.messages.is_empty() {
+            self.simulate_next_message()
+        }
+    }
+
+    pub fn trigger_node_housekeep(&mut self, addr: SocketAddr) {
+        let node = self.nodes.get_mut(&addr).unwrap();
+        DebugLogger::set_node(node.get_num());
+        node.trigger_housekeep();
+        DebugLogger::set_node(0);
+        let sock = node.socket();
+        while let Some((dst, data)) = sock.pop_outbound() {
+            self.messages.push_back((addr, dst, data));
+        }
+    }
+
+    pub fn trigger_housekeep(&mut self) {
+        for (src, node) in &mut self.nodes {
+            DebugLogger::set_node(node.get_num());
+            node.trigger_housekeep();
+            DebugLogger::set_node(0);
+            let sock = node.socket();
+            while let Some((dst, data)) = sock.pop_outbound() {
+                self.messages.push_back((*src, dst, data));
+            }
+        }
+    }
+
+    pub fn set_time(&mut self, time: Time) {
+        MockTimeSource::set_time(time);
+    }
+
+    pub fn simulate_time(&mut self, time: Time) {
+        let mut t = MockTimeSource::now();
+        while t < time {
+            t += 1;
+            self.set_time(t);
+            self.trigger_housekeep();
+            self.simulate_all_messages();
+        }
+    }
+
+    pub fn connect(&mut self, src: SocketAddr, dst: SocketAddr) {
+        let node = self.nodes.get_mut(&src).unwrap();
+        DebugLogger::set_node(node.get_num());
+        node.connect(dst).unwrap();
+        DebugLogger::set_node(0);
+        let sock = node.socket();
+        while let Some((dst, data)) = sock.pop_outbound() {
+            self.messages.push_back((src, dst, data));
+        }
+    }
+
+    pub fn is_connected(&self, src: SocketAddr, dst: SocketAddr) -> bool {
+        self.nodes.get(&src).unwrap().is_connected(&dst)
+    }
+
+    #[allow(dead_code)]
+    pub fn node_addresses(&self) -> Vec<SocketAddr> {
+        self.nodes.keys().copied().collect()
+    }
+
+    #[allow(dead_code)]
+    pub fn message_count(&self) -> usize {
+        self.messages.len()
+    }
+
+    pub fn put_payload(&mut self, addr: SocketAddr, data: Vec<u8>) {
+        let node = self.nodes.get_mut(&addr).unwrap();
+        node.device().put_inbound(data);
+        DebugLogger::set_node(node.get_num());
+        node.trigger_device_event();
+        DebugLogger::set_node(0);
+        let sock = node.socket();
+        while let Some((dst, data)) = sock.pop_outbound() {
+            self.messages.push_back((addr, dst, data));
+        }
+    }
+
+    pub fn pop_payload(&mut self, node: SocketAddr) -> Option<Vec<u8>> {
+        self.nodes.get_mut(&node).unwrap().device().pop_outbound()
+    }
+
+    pub fn drop_message(&mut self) {
+        self.messages.pop_front();
+    }
+}
--- a/src/tests/mod.rs
+++ b/src/tests/mod.rs
@ -1,217 +1,8 @@
 // VpnCloud - Peer-to-Peer VPN
-// Copyright (C) 2015-2020  Dennis Schwerdel
+// Copyright (C) 2015-2021  Dennis Schwerdel
 // This software is licensed under GPL-3 or newer (see LICENSE.md)

+mod common;
 mod nat;
 mod payload;
 mod peers;
-
-use std::{
-    collections::{HashMap, VecDeque},
-    io::Write,
-    net::{IpAddr, Ipv6Addr, SocketAddr},
-    sync::{
-        atomic::{AtomicUsize, Ordering},
-        Once
-    }
-};
-
-pub use super::{
-    engine::GenericCloud,
-    config::{Config, CryptoConfig},
-    device::{MockDevice, Type},
-    net::MockSocket,
-    payload::{Frame, Packet, Protocol},
-    types::Range,
-    util::{MockTimeSource, Time, TimeSource}
-};
-
-
-static INIT_LOGGER: Once = Once::new();
-
-pub fn init_debug_logger() {
-    INIT_LOGGER.call_once(|| {
-        log::set_boxed_logger(Box::new(DebugLogger)).unwrap();
-        log::set_max_level(log::LevelFilter::Debug);
-    })
-}
-
-static CURRENT_NODE: AtomicUsize = AtomicUsize::new(0);
-
-struct DebugLogger;
-
-impl DebugLogger {
-    pub fn set_node(node: usize) {
-        CURRENT_NODE.store(node, Ordering::SeqCst);
-    }
-}
-
-impl log::Log for DebugLogger {
-    #[inline]
-    fn enabled(&self, _metadata: &log::Metadata) -> bool {
-        true
-    }
-
-    #[inline]
-    fn log(&self, record: &log::Record) {
-        if self.enabled(record.metadata()) {
-            eprintln!("Node {} - {} - {}", CURRENT_NODE.load(Ordering::SeqCst), record.level(), record.args());
-        }
-    }
-
-    #[inline]
-    fn flush(&self) {
-        std::io::stderr().flush().expect("Failed to flush")
-    }
-}
-
-
-type TestNode<P> = GenericCloud<MockDevice, P, MockSocket, MockTimeSource>;
-
-pub struct Simulator<P: Protocol> {
-    next_port: u16,
-    nodes: HashMap<SocketAddr, TestNode<P>>,
-    messages: VecDeque<(SocketAddr, SocketAddr, Vec<u8>)>
-}
-
-pub type TapSimulator = Simulator<Frame>;
-#[allow(dead_code)]
-pub type TunSimulator = Simulator<Packet>;
-
-
-impl<P: Protocol> Simulator<P> {
-    pub fn new() -> Self {
-        init_debug_logger();
-        MockTimeSource::set_time(0);
-        Self { next_port: 1, nodes: HashMap::default(), messages: VecDeque::default() }
-    }
-
-    pub fn add_node(&mut self, nat: bool, config: &Config) -> SocketAddr {
-        let mut config = config.clone();
-        MockSocket::set_nat(nat);
-        config.listen = SocketAddr::new(IpAddr::V6(Ipv6Addr::UNSPECIFIED), self.next_port);
-        if config.crypto.password.is_none() && config.crypto.private_key.is_none() {
-            config.crypto.password = Some("test123".to_string())
-        }
-        DebugLogger::set_node(self.next_port as usize);
-        self.next_port += 1;
-        let node = TestNode::new(&config, MockDevice::new(), None, None);
-        DebugLogger::set_node(0);
-        self.nodes.insert(config.listen, node);
-        config.listen
-    }
-
-    #[allow(dead_code)]
-    pub fn get_node(&mut self, addr: SocketAddr) -> &mut TestNode<P> {
-        let node = self.nodes.get_mut(&addr).unwrap();
-        DebugLogger::set_node(node.get_num());
-        node
-    }
-
-    pub fn simulate_next_message(&mut self) {
-        if let Some((src, dst, data)) = self.messages.pop_front() {
-            if let Some(node) = self.nodes.get_mut(&dst) {
-                if node.socket().put_inbound(src, data) {
-                    DebugLogger::set_node(node.get_num());
-                    node.trigger_socket_event();
-                    DebugLogger::set_node(0);
-                    let sock = node.socket();
-                    let src = dst;
-                    while let Some((dst, data)) = sock.pop_outbound() {
-                        self.messages.push_back((src, dst, data));
-                    }
-                }
-            } else {
-                warn!("Message to unknown node {}", dst);
-            }
-        }
-    }
-
-    pub fn simulate_all_messages(&mut self) {
-        while !self.messages.is_empty() {
-            self.simulate_next_message()
-        }
-    }
-
-    pub fn trigger_node_housekeep(&mut self, addr: SocketAddr) {
-        let node = self.nodes.get_mut(&addr).unwrap();
-        DebugLogger::set_node(node.get_num());
-        node.trigger_housekeep();
-        DebugLogger::set_node(0);
-        let sock = node.socket();
-        while let Some((dst, data)) = sock.pop_outbound() {
-            self.messages.push_back((addr, dst, data));
-        }
-    }
-
-    pub fn trigger_housekeep(&mut self) {
-        for (src, node) in &mut self.nodes {
-            DebugLogger::set_node(node.get_num());
-            node.trigger_housekeep();
-            DebugLogger::set_node(0);
-            let sock = node.socket();
-            while let Some((dst, data)) = sock.pop_outbound() {
-                self.messages.push_back((*src, dst, data));
-            }
-        }
-    }
-
-    pub fn set_time(&mut self, time: Time) {
-        MockTimeSource::set_time(time);
-    }
-
-    pub fn simulate_time(&mut self, time: Time) {
-        let mut t = MockTimeSource::now();
-        while t < time {
-            t += 1;
-            self.set_time(t);
-            self.trigger_housekeep();
-            self.simulate_all_messages();
-        }
-    }
-
-    pub fn connect(&mut self, src: SocketAddr, dst: SocketAddr) {
-        let node = self.nodes.get_mut(&src).unwrap();
-        DebugLogger::set_node(node.get_num());
-        node.connect(dst).unwrap();
-        DebugLogger::set_node(0);
-        let sock = node.socket();
-        while let Some((dst, data)) = sock.pop_outbound() {
-            self.messages.push_back((src, dst, data));
-        }
-    }
-
-    pub fn is_connected(&self, src: SocketAddr, dst: SocketAddr) -> bool {
-        self.nodes.get(&src).unwrap().is_connected(&dst)
-    }
-
-    #[allow(dead_code)]
-    pub fn node_addresses(&self) -> Vec<SocketAddr> {
-        self.nodes.keys().copied().collect()
-    }
-
-    #[allow(dead_code)]
-    pub fn message_count(&self) -> usize {
-        self.messages.len()
-    }
-
-    pub fn put_payload(&mut self, addr: SocketAddr, data: Vec<u8>) {
-        let node = self.nodes.get_mut(&addr).unwrap();
-        node.device().put_inbound(data);
-        DebugLogger::set_node(node.get_num());
-        node.trigger_device_event();
-        DebugLogger::set_node(0);
-        let sock = node.socket();
-        while let Some((dst, data)) = sock.pop_outbound() {
-            self.messages.push_back((addr, dst, data));
-        }
-    }
-
-    pub fn pop_payload(&mut self, node: SocketAddr) -> Option<Vec<u8>> {
-        self.nodes.get_mut(&node).unwrap().device().pop_outbound()
-    }
-
-    pub fn drop_message(&mut self) {
-        self.messages.pop_front();
-    }
-}
--- a/src/tests/nat.rs
+++ b/src/tests/nat.rs
@ -1,8 +1,8 @@
 // VpnCloud - Peer-to-Peer VPN
-// Copyright (C) 2015-2020  Dennis Schwerdel
+// Copyright (C) 2015-2021  Dennis Schwerdel
 // This software is licensed under GPL-3 or newer (see LICENSE.md)

-use super::*;
+use super::common::*;

 #[test]
 fn connect_nat_2_peers() {
--- a/src/tests/payload.rs
+++ b/src/tests/payload.rs
@ -1,8 +1,8 @@
 // VpnCloud - Peer-to-Peer VPN
-// Copyright (C) 2015-2020  Dennis Schwerdel
+// Copyright (C) 2015-2021  Dennis Schwerdel
 // This software is licensed under GPL-3 or newer (see LICENSE.md)

-use super::*;
+use super::common::*;

 #[test]
 fn switch_delivers() {
--- a/src/tests/peers.rs
+++ b/src/tests/peers.rs
@ -1,8 +1,8 @@
 // VpnCloud - Peer-to-Peer VPN
-// Copyright (C) 2015-2020  Dennis Schwerdel
+// Copyright (C) 2015-2021  Dennis Schwerdel
 // This software is licensed under GPL-3 or newer (see LICENSE.md)

-use super::*;
+use super::common::*;

 #[test]
 fn direct_connect() {
--- a/src/traffic.rs
+++ b/src/traffic.rs
@ -1,5 +1,5 @@
 // VpnCloud - Peer-to-Peer VPN
-// Copyright (C) 2018-2020  Dennis Schwerdel
+// Copyright (C) 2015-2021  Dennis Schwerdel
 // This software is licensed under GPL-3 or newer (see LICENSE.md)

 use std::{
--- a/src/types.rs
+++ b/src/types.rs
@ -1,5 +1,5 @@
 // VpnCloud - Peer-to-Peer VPN
-// Copyright (C) 2015-2020  Dennis Schwerdel
+// Copyright (C) 2015-2021  Dennis Schwerdel
 // This software is licensed under GPL-3 or newer (see LICENSE.md)

 use crate::{
--- a/src/util.rs
+++ b/src/util.rs
@ -1,5 +1,5 @@
 // VpnCloud - Peer-to-Peer VPN
-// Copyright (C) 2015-2020  Dennis Schwerdel
+// Copyright (C) 2015-2021  Dennis Schwerdel
 // This software is licensed under GPL-3 or newer (see LICENSE.md)

 use std::process::Command;
--- a/src/wsproxy.rs
+++ b/src/wsproxy.rs
@ -0,0 +1,167 @@
+// VpnCloud - Peer-to-Peer VPN
+// Copyright (C) 2015-2021  Dennis Schwerdel
+// This software is licensed under GPL-3 or newer (see LICENSE.md)
+
+use super::{
+    net::{get_ip, mapped_addr, parse_listen, Socket},
+    poll::{WaitImpl, WaitResult},
+    port_forwarding::PortForwarding,
+    util::MsgBuffer
+};
+use byteorder::{NetworkEndian, ReadBytesExt, WriteBytesExt};
+use std::{
+    io::{self, Cursor, Read, Write},
+    net::{Ipv6Addr, SocketAddr, SocketAddrV6, TcpListener, TcpStream, UdpSocket},
+    os::unix::io::{AsRawFd, RawFd},
+    thread::spawn
+};
+use tungstenite::{client::AutoStream, connect, protocol::WebSocket, server::accept, Message};
+use url::Url;
+
+
+macro_rules! io_error {
+    ($val:expr, $format:expr) => ( {
+        $val.map_err(|err| io::Error::new(io::ErrorKind::Other, format!($format, err)))
+    } );
+    ($val:expr, $format:expr, $( $arg:expr ),+) => ( {
+        $val.map_err(|err| io::Error::new(io::ErrorKind::Other, format!($format, $( $arg ),+, err)))
+    } );
+}
+
+fn write_addr<W: Write>(addr: SocketAddr, mut out: W) -> Result<(), io::Error> {
+    let addr = mapped_addr(addr);
+    match mapped_addr(addr) {
+        SocketAddr::V6(addr) => {
+            out.write_all(&addr.ip().octets())?;
+            out.write_u16::<NetworkEndian>(addr.port())?;
+        }
+        _ => unreachable!()
+    }
+    Ok(())
+}
+
+fn read_addr<R: Read>(mut r: R) -> Result<SocketAddr, io::Error> {
+    let mut ip = [0u8; 16];
+    r.read_exact(&mut ip)?;
+    let port = r.read_u16::<NetworkEndian>()?;
+    let addr = SocketAddr::V6(SocketAddrV6::new(Ipv6Addr::from(ip), port, 0, 0));
+    Ok(addr)
+}
+
+fn serve_proxy_connection(stream: TcpStream) -> Result<(), io::Error> {
+    let peer = stream.peer_addr()?;
+    info!("WS client {} connected", peer);
+    stream.set_nodelay(true)?;
+    let mut websocket = io_error!(accept(stream), "Failed to initialize websocket with {}: {}", peer)?;
+    let udpsocket = UdpSocket::bind("[::]:0")?;
+    let mut msg = Vec::with_capacity(18);
+    let mut addr = udpsocket.local_addr()?;
+    info!("Listening on {} for peer {}", addr, peer);
+    addr.set_ip(get_ip());
+    write_addr(addr, &mut msg)?;
+    io_error!(websocket.write_message(Message::Binary(msg)), "Failed to write to ws connection: {}")?;
+    let websocketfd = websocket.get_ref().as_raw_fd();
+    let poll = WaitImpl::new(websocketfd, udpsocket.as_raw_fd(), 60 * 1000)?;
+    let mut buffer = [0; 65535];
+    for evt in poll {
+        match evt {
+            WaitResult::Socket => {
+                let msg = io_error!(websocket.read_message(), "Failed to read message on websocket {}: {}", peer)?;
+                match msg {
+                    Message::Binary(data) => {
+                        let dst = read_addr(Cursor::new(&data))?;
+                        udpsocket.send_to(&data[18..], dst)?;
+                    }
+                    Message::Close(_) => return Ok(()),
+                    _ => {}
+                }
+            }
+            WaitResult::Device => {
+                let (size, addr) = udpsocket.recv_from(&mut buffer)?;
+                let mut data = Vec::with_capacity(18 + size);
+                write_addr(addr, &mut data)?;
+                data.write_all(&buffer[..size])?;
+                io_error!(websocket.write_message(Message::Binary(data)), "Failed to write to {}: {}", peer)?;
+            }
+            WaitResult::Timeout => {
+                io_error!(websocket.write_message(Message::Ping(vec![])), "Failed to send ping: {}")?;
+            }
+            WaitResult::Error(err) => return Err(err)
+        }
+    }
+    Ok(())
+}
+
+pub fn run_proxy(listen: &str) -> Result<(), io::Error> {
+    let addr = parse_listen(listen);
+    let server = TcpListener::bind(addr)?;
+    info!("Listening on ws://{}", server.local_addr()?);
+    for stream in server.incoming() {
+        let stream = stream?;
+        let peer = stream.peer_addr()?;
+        spawn(move || {
+            if let Err(err) = serve_proxy_connection(stream) {
+                error!("Error on connection {}: {}", peer, err);
+            }
+        });
+    }
+    Ok(())
+}
+
+pub struct ProxyConnection {
+    addr: SocketAddr,
+    socket: WebSocket<AutoStream>
+}
+
+impl ProxyConnection {
+    fn read_message(&mut self) -> Result<Vec<u8>, io::Error> {
+        loop {
+            if let Message::Binary(data) = io_error!(self.socket.read_message(), "Failed to read from ws proxy: {}")? {
+                return Ok(data)
+            }
+        }
+    }
+}
+
+impl AsRawFd for ProxyConnection {
+    fn as_raw_fd(&self) -> RawFd {
+        self.socket.get_ref().as_raw_fd()
+    }
+}
+
+impl Socket for ProxyConnection {
+    fn listen(url: &str) -> Result<Self, io::Error> {
+        let parsed_url = io_error!(Url::parse(url), "Invalid URL {}: {}", url)?;
+        let (mut socket, _) = io_error!(connect(parsed_url), "Failed to connect to URL {}: {}", url)?;
+        socket.get_mut().set_nodelay(true)?;
+        let addr = "0.0.0.0:0".parse::<SocketAddr>().unwrap();
+        let mut con = ProxyConnection { addr, socket };
+        let addr_data = con.read_message()?;
+        con.addr = read_addr(Cursor::new(&addr_data))?;
+        Ok(con)
+    }
+
+    fn receive(&mut self, buffer: &mut MsgBuffer) -> Result<SocketAddr, io::Error> {
+        buffer.clear();
+        let data = self.read_message()?;
+        let addr = read_addr(Cursor::new(&data))?;
+        buffer.clone_from(&data[18..]);
+        Ok(addr)
+    }
+
+    fn send(&mut self, data: &[u8], addr: SocketAddr) -> Result<usize, io::Error> {
+        let mut msg = Vec::with_capacity(data.len() + 18);
+        write_addr(addr, &mut msg)?;
+        msg.write_all(data)?;
+        io_error!(self.socket.write_message(Message::Binary(msg)), "Failed to write to ws proxy: {}")?;
+        Ok(data.len())
+    }
+
+    fn address(&self) -> Result<SocketAddr, io::Error> {
+        Ok(self.addr)
+    }
+
+    fn create_port_forwarding(&self) -> Option<PortForwarding> {
+        None
+    }
+}
--- a/vpncloud.adoc
+++ b/vpncloud.adoc
@ -45,7 +45,10 @@ vpncloud - Peer-to-peer VPN
  The address on which to listen for data. This can be simply a port number
  or a full address in form IP:PORT. If the IP is specified as \'\*' or only
  a port number is given, then the socket will listen on all IPs (v4 and v6),
-  otherwise the socket will only listen on the given IP. [default: **3210**]
+  otherwise the socket will only listen on the given IP.
+  Alternatively, a websocket proxy URL (starting with ws://) can be given 
+  here. Please see the section *WEBSOCKET PROXY* for more info.
+  [default: **3210**]

 *-c <addr>*, *--peer <addr>*, *--connect <addr>*::
  Address of a peer to connect to. The address should be in the form
@ -62,31 +65,27 @@ vpncloud - Peer-to-peer VPN
  Do not automatically claim the IP set on the virtual interface (on TUN 
  devices).

-*-p <key>*, *--password <key>*::
+*-p <password>*, *--password <password>*::
  A password to encrypt the VPN data. This parameter must be set unless a 
  password is given in a config file or a private key is set.
  See *SECURITY* for more info.

 *--key <key>*, *--private-key <key>*::
  A private key to use for encryption. The key must be given as base62 as 
-  generated by *--genkey*. See *SECURITY* for more info.
+  generated by *genkey*. See *SECURITY* for more info.

 *--public-key <key>*::
  A public key matching the given private key. The key must be given as base62
-  as generated by *--genkey*. This argument is purely optional. See *SECURITY*
+  as generated by *genkey*. This argument is purely optional. See *SECURITY*
  for more info.

 *--trust <key>*, **--trusted-key <key>*::
  A public key to trust. Any peer must have a key pair that is trusted by this
  node, otherwise it will be rejected. The key must be given as base62 as 
-  generated by *--genkey*. This argument can be given multiple times. If it is 
+  generated by *genkey*. This argument can be given multiple times. If it is 
  not set, only the own public key will be trusted. See *SECURITY* for more 
  info.

-*--genkey*::
-  Generate and print a random key pair and exit. The key pair is printed as 
-  base62 and can be used as private-key, public-key and trusted-key options.
-
 *--algo <method>*, *--algorithm <method>*::
  Supported encryption algorithms ("plain", "aes128", "aes256", or "chacha20").
  Nodes exchange the supported algorithms and select the one that is fastest on
@ -179,9 +178,11 @@ vpncloud - Peer-to-peer VPN
 *--statsd-server <server>*::
  If set, periodically send statistics on current traffic and some important
  events to the given statsd server (host:port). 
+  Please see *STATSD SUPPORT* for more info.

 *--statsd-prefix <prefix>*::
  Sets the prefix to use for all statsd entries. [default: **vpncloud**]
+  Please see *STATSD SUPPORT* for more info.

 *--daemon*::
  Spawn a background process instead of running the process in the foreground.
@ -196,6 +197,12 @@ vpncloud - Peer-to-peer VPN
  Disable automatic port forward. If this option is not set, VpnCloud tries to
  detect a NAT router and automatically add a port forwarding to it.

+*--hook <script>*::
+  Call the given script on an event. If the script is in the format *event:script*,
+  it will only be called for the specified event type, otherwise it will be called
+  for all events. This parameter can be given multiple times.
+  Please see the section *HOOK SCRIPTS* for more info.
+
 *-v*, *--verbose*::
  Print debug information, including information for data being received and
  sent.
@ -207,6 +214,41 @@ vpncloud - Peer-to-peer VPN
  Display the help.


+== SUBCOMMANDS
+
+The following subcommands can be given to run some special action instead of
+running a VpnCloud instance. Any parameters must be given after the subcommand
+name (except for -v -q and -h). Only the listed parameters are accepted for the
+subcommands.
+
+*genkey*::
+  Generate and print a random key pair and exit. The key pair is printed as 
+  base62 and can be used as private-key, public-key and trusted-key options.
+  See *SECURITY* for more info.
+
+  *-p <password>*, *--password <password>*:::
+    Derive the key pair from the given password instead of creating randomly.
+
+*ws-proxy*::
+  Run a websocket proxy instead of the normal VpnCloud instance. 
+  See *WEBSOCKET PROXY* for more info.
+
+  *-l <addr>*, *--listen <addr>*:::
+    Listen on the given TCP address (IP:PORT or PORT). [default: **3210**]
+
+*migrate-config*::
+  Migrate an old config to the current config format.
+
+  *--config-file*:::
+    The path of the config file to convert.
+
+*completion*::
+  Output shell completions for the VpnCloud command.
+
+  *--shell*:::
+    The shell type to create completions for. [default: **bash**]
+
+
 == DESCRIPTION

 *VpnCloud* is a peer-to-peer VPN over UDP. It creates a virtual network 
@ -302,28 +344,28 @@ are optional and override the defaults. Please see the section *OPTIONS* for
 detailed descriptions of the options.

 *device*:: A key-value map with device settings
-  *type*:: Set the type of network. Same as *--type*
-  *name*:: Name of the virtual device. Same as *--device*
-  *path*:: Set the path of the base device. Same as *--device-path*
-  *fix-rp-filter*:: Fix the rp_filter settings on the host. Same as *--fix-rp-filter*
+  *type*::: Set the type of network. Same as *--type*
+  *name*::: Name of the virtual device. Same as *--device*
+  *path*::: Set the path of the base device. Same as *--device-path*
+  *fix-rp-filter*::: Fix the rp_filter settings on the host. Same as *--fix-rp-filter*
 *ip*:: An IP address (plus optional prefix length) for the interface. Same as *--ip*
 *ifup*:: A command to setup the network interface. Same as *--ifup*
 *ifdown*:: A command to bring down the network interface. Same as *--ifdown*
 *crypto*:: A key-value map with crypto settings
-  *algorithms*:: The encryption algorithms to support. See *--algorithm*
-  *password*:: The password to use for encryption. Same as *--password*
-  *private-key*:: The private key to use. Same as *--private-key*
-  *public-key*:: The public key to use. Same as *--public-key*
-  *trusted-keys*:: Other public keys to trust. See *--trusted-key*
+  *algorithms*::: The encryption algorithms to support. See *--algorithm*
+  *password*::: The password to use for encryption. Same as *--password*
+  *private-key*::: The private key to use. Same as *--private-key*
+  *public-key*::: The public key to use. Same as *--public-key*
+  *trusted-keys*::: Other public keys to trust. See *--trusted-key*
 *listen*:: The address on which to listen for data. Same as *--listen*
 *peers*:: A list of addresses to connect to. See *--connect*
 *peer_timeout*:: Peer timeout in seconds. Same as *--peer-timeout*
 *keepalive*:: Periodically send message to keep connections alive. Same as *--keepalive*
 *beacon*:: A key-value map with beacon settings
-  *store*:: Path or command to store beacons. Same as *--beacon-store*
-  *load*:: Path or command to load beacons. Same as *--beacon-load*
-  *interval*:: Interval for loading and storing beacons in seconds. Same as *--beacon-interval*
-  *password*:: Password to encrypt the beacon with. Same as *--beacon-password*
+  *store*::: Path or command to store beacons. Same as *--beacon-store*
+  *load*::: Path or command to load beacons. Same as *--beacon-load*
+  *interval*::: Interval for loading and storing beacons in seconds. Same as *--beacon-interval*
+  *password*::: Password to encrypt the beacon with. Same as *--beacon-password*
 *mode*:: The mode of the VPN. Same as *--mode*
 *switch_timeout*:: Switch table entry timeout in seconds. Same as *--switch-timeout*
 *claims*:: A list of local subnets to claim. See *--claim*
@ -334,8 +376,10 @@ detailed descriptions of the options.
 *pid_file*:: The path of the pid file to create. Same as *--pid-file*
 *stats_file*:: The path of the statistics file. Same as *--stats-file*
 *statsd*:: A key-value map with statsd settings
-  *server*:: Server to report statistics to. Same as *--statsd-server*
-  *prefix*:: Prefix to use when reporting to statsd. Same as *--statsd-prefix*
+  *server*::: Server to report statistics to. Same as *--statsd-server*
+  *prefix*::: Prefix to use when reporting to statsd. Same as *--statsd-prefix*
+*hook*:: A hook script to be called for every event type. See *HOOK SCRIPTS* for info.
+*hooks*:: A map of event type to script for scripts that only fire for one event type. See *HOOK SCRIPTS* for info.

 === Example

@ -366,7 +410,7 @@ VpnCloud uses strong cryptography based on modern cryptographic primitives.
 Before exchanging any payload data with peers a secure connection is 
 initialized based on key pairs. Each node has a key pair consisting of a 
 private and a public key (*--private-key* and *--public-key*). Those key pairs
-can be generated via *--genkey*. 
+can be generated via *genkey*. 
 To allow connections, nodes need to list the public keys of all other nodes as 
 trusted keys (*--trusted-key*). To simplify the key exchange, key pairs can be
 derived from passwords (*--password*). If no trusted keys are configured, nodes
@ -461,6 +505,90 @@ All keys are prefixed by a common prefix. The prefix defaults to *vpncloud* but
 can be changed via **--statsd-prefix** or the config option **statsd_prefix**.


+== WEBSOCKET PROXY
+
+The websocket proxy mode replaces the local UDP port by a websocket proxy to allow
+connectivity even in very restricted environments.
+
+This means that instead of listening on a local port for incoming messages and
+sending outgoing messages via this port, all UDP traffic will be forwarded to and
+received from a remote proxy via the websocket protocol. This proxy opens a UDP 
+port for each VpnCloud instance that connects to it. The instance can use this port
+remotely just like it would use a real local UDP port.
+
+The proxy is transparent, it does not manipulate or even decrypt the messages it 
+forwards. Trust relations are still created between VpnCloud instances, not between
+an instance and the proxy. The proxy only ever sees encrypted messages. Therefore,
+the connection to it uses plain HTTP.
+
+A websocket proxy can be stared by using the *ws-proxy* subcommand. A custom port 
+can be set using the *--listen* parameter. (Note that this port never conflicts 
+with a VpnCloud port on the same machine since VpnCloud uses UDP and the proxy uses
+TCP.)
+
+A VpnCloud instance can use a websocket proxy instead of opening a local port by 
+specifying the websocket proxy via its *--listen* parameter 
+(e.g. *--listen ws://example.com:3210*). Note that the websocket URL must start with
+*ws:\/\/*, not *http:\/\/*.
+
+
+== HOOK SCRIPTS
+
+VpnCloud supports calling hook scripts on certain events. The scripts can either be
+configured on the command line or in the config file. Hook scripts can either be
+configured per event type or globally.
+
+When an event occurs, the specified hook script is executed using 
+the current permissions of the user that started the instance. Note that this means 
+that if VpnCloud is configured to drop permissions, only the events *device_setup* 
+and *device_configured* will be executed using root permissions.
+
+Hook scripts are executed using *sh -c*, so either binaries, shell scripts and even 
+shell commands can be used. The script will be executed in parallel to the VpnCloud 
+instance. Its output will be printed to the stdout of VpnCloud and the return code 
+is ignored.
+
+The hook script will receive information on the event using environment variables.
+The variable *EVENT* will contain the name of the event. Other variables depend on 
+the event type.
+
+The following event types
+
+  *peer_connecting*::
+    A new peer connection is in the process of being established. The variable 
+    *PEER* contains the address of the peer but no other information is known at 
+    that point in time.
+    Variables: *IFNAME*, *PEER*
+
+  *peer_connected*::
+    A new peer successfully connected to this instance. Besides the peer address,
+    also a list of claims (*CLAIMS*, space separated) and the node id of the new 
+    peer (*NODE_ID*) are given to the script.
+    Variables: *IFNAME*, *PEER*, *CLAIMS*, *NODE_ID*
+
+  *peer_disconnected*::
+    A peer connection has been closed. If the peer has been fully connected, the
+    node id is given (*NODE_ID*).
+    Variables: *IFNAME*, *PEER*, (*NODE_ID*)
+
+  *device_setup*::
+    This event is fired when the virtual device has been created but not yet
+    configured.
+    Variables: *IFNAME*
+
+  *device_configured*::
+    This event is fired when the virtual device is fully configured.
+    Variables: *IFNAME*
+
+  *vpn_started*::
+    This event is fired when the VPN is ready to be used.
+    Variables: *IFNAME*
+
+  *vpn_shutdown*::
+    This event is fired when the VPN s shutting down.
+    Variables: *IFNAME*
+
+
 == DEVICE SETUP

 The device is setup using the following steps:
@ -486,5 +614,5 @@ given.

 == COPYRIGHT

-Copyright (C) 2015-2020  Dennis Schwerdel
+Copyright (C) 2015-2021  Dennis Schwerdel
 This software is licensed under GPL-3 or newer (see LICENSE.md)
Author	SHA1	Message	Date
Dennis Schwerdel	21d58f25a3	Changed crypto	2021-02-09 23:50:00 +01:00
Dennis Schwerdel	dd665784c6	Merge branch 'master' into threading	2021-02-09 16:47:13 +01:00
Dennis Schwerdel	ad2e2014eb	Change description	2021-02-09 16:23:34 +01:00
dswd	522d7d3f9c	Merge pull request #157 from dswd/dependabot/cargo/libc-0.2.86 Bump libc from 0.2.85 to 0.2.86	2021-02-09 16:21:10 +01:00
dswd	ee618ba042	Merge pull request #156 from dswd/dependabot/cargo/tungstenite-0.13.0 Bump tungstenite from 0.12.0 to 0.13.0	2021-02-09 16:20:59 +01:00
dependabot[bot]	61b66fa71c	Bump tungstenite from 0.12.0 to 0.13.0 Bumps [tungstenite](https://github.com/snapview/tungstenite-rs) from 0.12.0 to 0.13.0. - [Release notes](https://github.com/snapview/tungstenite-rs/releases) - [Changelog](https://github.com/snapview/tungstenite-rs/blob/master/CHANGELOG.md) - [Commits](https://github.com/snapview/tungstenite-rs/compare/v0.12.0...v0.13.0) Signed-off-by: dependabot[bot] <support@github.com>	2021-02-09 07:24:05 +00:00
dependabot[bot]	506c0656ef	Bump libc from 0.2.85 to 0.2.86 Bumps [libc](https://github.com/rust-lang/libc) from 0.2.85 to 0.2.86. - [Release notes](https://github.com/rust-lang/libc/releases) - [Commits](https://github.com/rust-lang/libc/compare/0.2.85...0.2.86) Signed-off-by: dependabot[bot] <support@github.com>	2021-02-09 07:23:12 +00:00
Dennis Schwerdel	2955a80af4	More benchmarking	2021-02-08 17:30:58 +01:00
Dennis Schwerdel	38c3ba1177	Add service for ws proxy	2021-02-08 15:13:58 +01:00
Dennis Schwerdel	0cffea7017	Change example config file	2021-02-08 10:11:35 +01:00
Dennis Schwerdel	7abeea1f95	Update copyright	2021-02-08 10:11:20 +01:00
Dennis Schwerdel	29630ab763	Update benches	2021-02-08 10:06:47 +01:00
Dennis Schwerdel	ecebd2aab8	Some updates	2021-02-07 19:42:23 +01:00
Dennis Schwerdel	d9a2ee28cc	Release v2.1.0	2021-02-06 13:27:19 +01:00
Dennis Schwerdel	5236adf7b3	Fix some lints	2021-02-06 13:09:11 +01:00
Dennis Schwerdel	13688edd75	Prepare release	2021-02-05 18:27:48 +01:00
Dennis Schwerdel	ed260d9a98	Merge branch 'master' of github.com:dswd/vpncloud	2021-02-04 23:43:16 +01:00
Dennis Schwerdel	d154f85ecd	Changelog	2021-02-04 23:42:51 +01:00
Dennis Schwerdel	65eef143cd	Small improvements	2021-02-04 23:38:08 +01:00
Dennis Schwerdel	791ecfb0fe	Remove tls support on client	2021-02-04 22:12:20 +01:00
Dennis Schwerdel	e9122743e9	Feature gate websockets	2021-02-04 21:42:38 +01:00
Dennis Schwerdel	bd0d102358	Add configurable WS port	2021-02-04 21:19:05 +01:00
Dennis Schwerdel	a113b3ba22	Remove unused imports	2021-02-03 22:46:53 +01:00
Dennis Schwerdel	f0d9ad2ccd	Merge branch 'master' into wsproxy	2021-02-03 22:44:31 +01:00
Dennis Schwerdel	e3fa631ed9	Working example	2021-02-03 22:03:42 +01:00
dswd	4c934ea028	Merge pull request #150 from dswd/dependabot/cargo/libc-0.2.85 Bump libc from 0.2.84 to 0.2.85	2021-02-03 18:00:24 +01:00
dswd	03ec09d27c	Merge pull request #151 from dswd/dependabot/cargo/serde_yaml-0.8.16 Bump serde_yaml from 0.8.15 to 0.8.16	2021-02-03 18:00:14 +01:00
dependabot[bot]	221d4ed490	Bump serde_yaml from 0.8.15 to 0.8.16 Bumps [serde_yaml](https://github.com/dtolnay/serde-yaml) from 0.8.15 to 0.8.16. - [Release notes](https://github.com/dtolnay/serde-yaml/releases) - [Commits](https://github.com/dtolnay/serde-yaml/compare/0.8.15...0.8.16) Signed-off-by: dependabot[bot] <support@github.com>	2021-02-03 05:13:41 +00:00
dependabot[bot]	f637af0faa	Bump libc from 0.2.84 to 0.2.85 Bumps [libc](https://github.com/rust-lang/libc) from 0.2.84 to 0.2.85. - [Release notes](https://github.com/rust-lang/libc/releases) - [Commits](https://github.com/rust-lang/libc/compare/0.2.84...0.2.85) Signed-off-by: dependabot[bot] <support@github.com>	2021-02-03 05:13:39 +00:00
dswd	1e11e15ea6	Merge pull request #149 from dswd/dependabot/cargo/ring-0.16.20 Bump ring from 0.16.19 to 0.16.20	2021-02-02 07:55:14 +01:00
dependabot[bot]	79c4f4ef9f	Bump ring from 0.16.19 to 0.16.20 Bumps [ring](https://github.com/briansmith/ring) from 0.16.19 to 0.16.20. - [Release notes](https://github.com/briansmith/ring/releases) - [Commits](https://github.com/briansmith/ring/commits) Signed-off-by: dependabot[bot] <support@github.com>	2021-02-02 05:21:33 +00:00
dswd	0c3cbcf390	Merge pull request #148 from dswd/dependabot/cargo/libc-0.2.84 Bump libc from 0.2.83 to 0.2.84	2021-01-30 16:44:11 +01:00
dependabot[bot]	7f135fbf24	Bump libc from 0.2.83 to 0.2.84 Bumps [libc](https://github.com/rust-lang/libc) from 0.2.83 to 0.2.84. - [Release notes](https://github.com/rust-lang/libc/releases) - [Commits](https://github.com/rust-lang/libc/commits) Signed-off-by: dependabot[bot] <support@github.com>	2021-01-29 18:29:03 +00:00
Dennis Schwerdel	124f7cbff9	Almost works	2020-12-20 13:28:01 +01:00
Dennis Schwerdel	d50490ac51	Client works	2020-12-20 01:40:32 +01:00