dswd
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vpncloud
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Merge branch 'hooks'

This commit is contained in:
Dennis Schwerdel 2021-01-24 19:25:57 +01:00
parent a6cc124c56 2a8ea5087b
commit cd619d3980
8 changed files with 169 additions and 62 deletions
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3
CHANGELOG.md
View File

@ -5,8 +5,9 @@ This project follows [semantic versioning](http://semver.org).
### UNRELEASED
- [added] Support for creating shell completions
- [added] Support for hook scripts to handle certain situations
- [removed] Removed dummy device type
- [changed] Updated depdendencies
- [changed] Updated dependencies
- [changed] Changed Rust version to 1.49.0
- [fixed] Added missing peer address propagation

8
Cargo.lock generated
View File

@ -147,9 +147,9 @@ dependencies = [
[[package]]
name = "getrandom"
version = "0.2.1"
version = "0.2.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "4060f4657be78b8e766215b02b18a2e862d83745545de804638e2b545e81aee6"
checksum = "c9495705279e7140bf035dde1f6e750c162df8b625267cd52cc44e0b156732c8"
dependencies = [
"cfg-if 1.0.0",
"libc",
@ -167,9 +167,9 @@ dependencies = [
[[package]]
name = "hermit-abi"
version = "0.1.17"
version = "0.1.18"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5aca5565f760fb5b220e499d72710ed156fdb74e631659e99377d9ebfbd13ae8"
checksum = "322f4de77956e22ed0e5032c359a0f1273f1f7f0d79bfa3b8ffbc730d7fbcc5c"
dependencies = [
"libc",
]

53
src/cloud.rs
View File

@ -26,7 +26,8 @@ use crate::{
device::{Device, Type},
error::Error,
messages::{
AddrList, NodeInfo, PeerInfo, MESSAGE_TYPE_CLOSE, MESSAGE_TYPE_DATA, MESSAGE_TYPE_KEEPALIVE, MESSAGE_TYPE_NODE_INFO
AddrList, NodeInfo, PeerInfo, MESSAGE_TYPE_CLOSE, MESSAGE_TYPE_DATA, MESSAGE_TYPE_KEEPALIVE,
MESSAGE_TYPE_NODE_INFO
},
net::{mapped_addr, Socket},
payload::Protocol,
@ -35,7 +36,7 @@ use crate::{
table::ClaimTable,
traffic::TrafficStats,
types::{Address, Mode, NodeId, Range, RangeList},
util::{addr_nice, resolve, CtrlC, Duration, MsgBuffer, StatsdMsg, Time, TimeSource}
util::{addr_nice, bytes_to_hex, resolve, CtrlC, Duration, MsgBuffer, StatsdMsg, Time, TimeSource}
};
pub type Hash = BuildHasherDefault<FnvHasher>;
@ -125,6 +126,9 @@ impl<D: Device, P: Protocol, S: Socket, TS: TimeSource> GenericCloud<D, P, S, TS
info!("Auto-claiming {} due to interface address", range);
claims.push(range);
}
Err(Error::DeviceIo(_, e)) if e.kind() == io::ErrorKind::AddrNotAvailable => {
info!("No address set on interface.")
}
Err(e) => error!("{}", e)
}
}
@ -225,6 +229,7 @@ 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());
}
// TODO: detect address changes and call event
Ok(())
}
@ -279,6 +284,13 @@ impl<D: Device, P: Protocol, S: Socket, TS: TimeSource> GenericCloud<D, P, S, TS
return Ok(())
}
}
if !addrs.is_empty() {
self.config.call_hook(
"peer_connecting",
vec![("PEER", format!("{:?}", addr_nice(addrs[0]))), ("IFNAME", self.device.ifname().to_owned())],
true
);
}
// Send a message to each resolved address
for a in addrs {
// Ignore error this time
@ -454,6 +466,7 @@ 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 {
@ -628,6 +641,16 @@ impl<D: Device, P: Protocol, S: Socket, TS: TimeSource> GenericCloud<D, P, S, TS
fn add_new_peer(&mut self, addr: SocketAddr, info: NodeInfo) -> Result<(), Error> {
info!("Added peer {}", addr_nice(addr));
self.config.call_hook(
"peer_connected",
vec![
("PEER", format!("{:?}", addr_nice(addr))),
("IFNAME", self.device.ifname().to_owned()),
("CLAIMS", info.claims.iter().map(|r| format!("{:?}", r)).collect::<Vec<String>>().join(" ")),
("NODE_ID", bytes_to_hex(&info.node_id)),
],
true
);
if let Some(init) = self.pending_inits.remove(&addr) {
self.peers.insert(addr, PeerData {
addrs: info.addrs.clone(),
@ -645,9 +668,18 @@ impl<D: Device, P: Protocol, S: Socket, TS: TimeSource> GenericCloud<D, P, S, TS
}
fn remove_peer(&mut self, addr: SocketAddr) {
if let Some(_peer) = self.peers.remove(&addr) {
if let Some(peer) = self.peers.remove(&addr) {
info!("Closing connection to {}", addr_nice(addr));
self.table.remove_claims(addr);
self.config.call_hook(
"peer_disconnected",
vec![
("PEER", format!("{:?}", addr)),
("IFNAME", self.device.ifname().to_owned()),
("NODE_ID", bytes_to_hex(&peer.node_id)),
],
true
);
}
}
@ -761,6 +793,14 @@ impl<D: Device, P: Protocol, S: Socket, TS: TimeSource> GenericCloud<D, P, S, TS
let msg_result = init.handle_message(data);
match msg_result {
Ok(res) => {
self.config.call_hook(
"peer_connecting",
vec![
("PEER", format!("{:?}", addr_nice(src))),
("IFNAME", self.device.ifname().to_owned()),
],
true
);
self.pending_inits.insert(src, init);
Ok(res)
}
@ -800,6 +840,11 @@ impl<D: Device, P: Protocol, S: Socket, TS: TimeSource> GenericCloud<D, P, S, TS
debug!("Fatal crypto init error from {}: {}", src, e);
info!("Closing pending connection to {} due to error in crypto init", addr_nice(src));
self.pending_inits.remove(&src);
self.config.call_hook(
"peer_disconnected",
vec![("PEER", format!("{:?}", addr_nice(src))), ("IFNAME", self.device.ifname().to_owned())],
true
);
}
Err(e @ Error::CryptoInit(_)) => {
debug!("Recoverable init error from {}: {}", src, e);
@ -831,6 +876,7 @@ impl<D: Device, P: Protocol, S: Socket, TS: TimeSource> GenericCloud<D, P, S, TS
let waiter = try_fail!(WaitImpl::new(&self.socket, &self.device, 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);
for evt in waiter {
match evt {
WaitResult::Error(err) => {
@ -856,6 +902,7 @@ impl<D: Device, P: Protocol, S: Socket, TS: TimeSource> GenericCloud<D, P, S, TS
}
}
info!("Shutting down...");
self.config.call_hook("vpn_shutdown", vec![("IFNAME", self.device.ifname())], true);
buffer.clear();
self.broadcast_msg(MESSAGE_TYPE_CLOSE, &mut buffer).ok();
if let Some(ref path) = self.config.beacon_store {

92
src/config.rs
View File

@ -4,19 +4,20 @@
use super::{device::Type, types::Mode, util::Duration};
pub use crate::crypto::Config as CryptoConfig;
use crate::util::run_cmd;
use std::{
cmp::max,
net::{IpAddr, Ipv6Addr, SocketAddr}
collections::HashMap,
ffi::OsStr,
net::{IpAddr, Ipv6Addr, SocketAddr},
process::Command,
thread
};
use structopt::StructOpt;
use structopt::clap::Shell;
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: {}");
@ -61,7 +62,9 @@ pub struct Config {
pub statsd_server: Option<String>,
pub statsd_prefix: Option<String>,
pub user: Option<String>,
pub group: Option<String>
pub group: Option<String>,
pub hook: Option<String>,
pub hooks: HashMap<String, String>
}
impl Default for Config {
@ -94,7 +97,9 @@ impl Default for Config {
statsd_server: None,
statsd_prefix: None,
user: None,
group: None
group: None,
hook: None,
hooks: HashMap::new()
}
}
}
@ -199,6 +204,12 @@ impl Config {
if !file.crypto.algorithms.is_empty() {
self.crypto.algorithms = file.crypto.algorithms.clone();
}
if let Some(val) = file.hook {
self.hook = Some(val)
}
for (k, v) in file.hooks {
self.hooks.insert(k, v);
}
}
pub fn merge_args(&mut self, mut args: Args) {
@ -292,6 +303,16 @@ impl Config {
if !args.algorithms.is_empty() {
self.crypto.algorithms = args.algorithms.clone();
}
for s in args.hook {
if s.contains(':') {
let pos = s.find(':').unwrap();
let name = &s[..pos];
let hook = &s[pos+1..];
self.hooks.insert(name.to_string(), hook.to_string());
} else {
self.hook = Some(s);
}
}
}
pub fn get_keepalive(&self) -> Duration {
@ -300,8 +321,31 @@ impl Config {
None => max(self.peer_timeout / 2 - 60, 1)
}
}
}
pub fn call_hook(
&self, event: &'static str, envs: impl IntoIterator<Item = (&'static str, impl AsRef<OsStr>)>, detach: bool
) {
let mut script = None;
if let Some(ref s) = self.hook {
script = Some(s);
}
if let Some(ref s) = self.hooks.get(event) {
script = Some(s);
}
if script.is_none() {
return
}
let script = script.unwrap();
let mut cmd = Command::new("sh");
cmd.arg("-c").arg(script).envs(envs).env("EVENT", event);
debug!("Running event script: {:?}", cmd);
if detach {
thread::spawn(move || run_cmd(cmd));
} else {
run_cmd(cmd)
}
}
}
#[derive(StructOpt, Debug, Default)]
pub struct Args {
@ -463,7 +507,11 @@ pub struct Args {
/// Generate shell completions
#[structopt(long)]
pub completion: Option<Shell>
pub completion: Option<Shell>,
/// Call script on event
#[structopt(long)]
pub hook: Vec<String>
}
#[derive(Serialize, Deserialize, Debug, PartialEq, Default)]
@ -517,10 +565,11 @@ pub struct ConfigFile {
pub stats_file: Option<String>,
pub statsd: Option<ConfigFileStatsd>,
pub user: Option<String>,
pub group: Option<String>
pub group: Option<String>,
pub hook: Option<String>,
pub hooks: HashMap<String, String>
}
#[test]
fn config_file() {
let config_file = "
@ -587,7 +636,9 @@ statsd:
statsd: Some(ConfigFileStatsd {
server: Some("example.com:1234".to_string()),
prefix: Some("prefix".to_string())
})
}),
hook: None,
hooks: HashMap::new()
})
}
@ -621,9 +672,12 @@ fn default_config_as_default() {
statsd_server: None,
statsd_prefix: None,
user: None,
group: None
group: None,
hook: None,
hooks: HashMap::new()
};
let default_config_file = serde_yaml::from_str::<ConfigFile>(include_str!("../assets/example.net.disabled")).unwrap();
let default_config_file =
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());
}
@ -664,7 +718,9 @@ fn config_merge() {
statsd: Some(ConfigFileStatsd {
server: Some("example.com:1234".to_string()),
prefix: Some("prefix".to_string())
})
}),
hook: None,
hooks: HashMap::new()
});
assert_eq!(config, Config {
device_type: Type::Tun,
@ -753,6 +809,8 @@ fn config_merge() {
stats_file: Some("/var/log/vpncloud-mynet.stats".to_string()),
statsd_server: Some("example.com:2345".to_string()),
statsd_prefix: Some("prefix2".to_string()),
daemonize: true
daemonize: true,
hook: None,
hooks: HashMap::new()
});
}

6
src/device.rs
View File

@ -5,12 +5,12 @@
use std::{
cmp,
collections::VecDeque,
convert::TryInto,
fmt,
fs::{self, File},
io::{self, BufRead, BufReader, Cursor, Error as IoError, Read, Write},
net::{Ipv4Addr, UdpSocket},
os::unix::io::{AsRawFd, RawFd},
convert::TryInto,
str,
str::FromStr
};
@ -36,7 +36,7 @@ struct IfReq {
impl IfReq {
fn new(name: &str) -> Self {
assert!(name.len() < libc::IF_NAMESIZE);
let mut ifr_name = [0 as u8; libc::IF_NAMESIZE];
let mut ifr_name = [0; libc::IF_NAMESIZE];
ifr_name[..name.len()].clone_from_slice(name.as_bytes());
Self { ifr_name, data: IfReqData { _dummy: [0; 24] } }
}
@ -329,7 +329,7 @@ impl Device for MockDevice {
}
fn ifname(&self) -> &str {
unimplemented!()
"mock0"
}
fn read(&mut self, buffer: &mut MsgBuffer) -> Result<(), Error> {

2
src/main.rs
View File

@ -140,6 +140,7 @@ fn setup_device(config: &Config) -> TunTapDevice {
config.device_name
);
info!("Opened device {}", device.ifname());
config.call_hook("device_setup", vec![("IFNAME", device.ifname())], true);
if let Err(err) = device.set_mtu(None) {
error!("Error setting optimal MTU on {}: {}", device.ifname(), err);
}
@ -159,6 +160,7 @@ fn setup_device(config: &Config) -> TunTapDevice {
warn!("Your networking configuration might be affected by a vulnerability (https://vpncloud.ddswd.de/docs/security/cve-2019-14899/), please change your rp_filter setting to 1 (currently {}).", val);
}
}
config.call_hook("device_configured", vec![("IFNAME", device.ifname())], true);
device
}

10
src/oldconfig.rs
View File

@ -1,5 +1,6 @@
use super::{device::Type, types::Mode, util::Duration};
use crate::config::{ConfigFile, ConfigFileBeacon, ConfigFileDevice, ConfigFileStatsd, CryptoConfig};
use std::collections::HashMap;
#[derive(Serialize, Deserialize, Debug, PartialEq, Clone, Copy)]
pub enum OldCryptoMethod {
@ -112,12 +113,11 @@ impl OldConfigFile {
pid_file: self.pid_file,
port_forwarding: self.port_forwarding,
stats_file: self.stats_file,
statsd: Some(ConfigFileStatsd {
prefix: self.statsd_prefix,
server: self.statsd_server
}),
statsd: Some(ConfigFileStatsd { prefix: self.statsd_prefix, server: self.statsd_server }),
switch_timeout: self.dst_timeout,
user: self.user
user: self.user,
hook: None,
hooks: HashMap::new()
}
}
}

55
src/util.rs
View File

@ -2,31 +2,31 @@
// Copyright (C) 2015-2020 Dennis Schwerdel
// This software is licensed under GPL-3 or newer (see LICENSE.md)
use std::process::Command;
use std::{
fmt,
net::{Ipv4Addr, SocketAddr, ToSocketAddrs, UdpSocket},
sync::atomic::{AtomicIsize, Ordering}
sync::atomic::{AtomicIsize, Ordering},
};
use crate::error::Error;
#[cfg(not(target_os = "linux"))] use time;
#[cfg(not(target_os = "linux"))]
use time;
use signal::{trap::Trap, Signal};
use smallvec::SmallVec;
use std::time::Instant;
pub type Duration = u32;
pub type Time = i64;
#[derive(Clone)]
pub struct MsgBuffer {
space_before: usize,
buffer: [u8; 65535],
start: usize,
end: usize
end: usize,
}
impl MsgBuffer {
@ -98,7 +98,6 @@ impl MsgBuffer {
}
}
const HEX_CHARS: &[u8] = b"0123456789abcdef";
pub fn bytes_to_hex(bytes: &[u8]) -> String {
@ -113,13 +112,12 @@ pub fn bytes_to_hex(bytes: &[u8]) -> String {
pub fn addr_nice(addr: SocketAddr) -> SocketAddr {
if let SocketAddr::V6(v6addr) = addr {
if let Some(ip) = v6addr.ip().to_ipv4() {
return (ip, addr.port()).into()
return (ip, addr.port()).into();
}
}
addr
}
pub struct Encoder;
impl Encoder {
@ -172,7 +170,6 @@ impl Encoder {
}
}
macro_rules! fail {
($format:expr) => ( {
use std::process;
@ -215,17 +212,14 @@ pub fn get_internal_ip() -> Ipv4Addr {
}
}
#[allow(unknown_lints, clippy::needless_pass_by_value)]
pub fn resolve<Addr: ToSocketAddrs + fmt::Debug>(addr: Addr) -> Result<SmallVec<[SocketAddr; 4]>, Error> {
let mut addrs =
addr.to_socket_addrs().map_err(|_| Error::NameUnresolvable(format!("{:?}", addr)))?.collect::<SmallVec<_>>();
// Try IPv4 first as it usually is faster
addrs.sort_by_key(|addr| {
match *addr {
SocketAddr::V4(_) => 4,
SocketAddr::V6(_) => 6
}
addrs.sort_by_key(|addr| match *addr {
SocketAddr::V4(_) => 4,
SocketAddr::V6(_) => 6,
});
// Remove duplicates in addrs (why are there duplicates???)
addrs.dedup();
@ -239,7 +233,6 @@ macro_rules! addr {
}};
}
pub struct Bytes(pub u64);
impl fmt::Display for Bytes {
@ -248,31 +241,30 @@ impl fmt::Display for Bytes {
if size >= 512.0 {
size /= 1024.0;
} else {
return write!(formatter, "{:.0} B", size)
return write!(formatter, "{:.0} B", size);
}
if size >= 512.0 {
size /= 1024.0;
} else {
return write!(formatter, "{:.1} KiB", size)
return write!(formatter, "{:.1} KiB", size);
}
if size >= 512.0 {
size /= 1024.0;
} else {
return write!(formatter, "{:.1} MiB", size)
return write!(formatter, "{:.1} MiB", size);
}
if size >= 512.0 {
size /= 1024.0;
} else {
return write!(formatter, "{:.1} GiB", size)
return write!(formatter, "{:.1} GiB", size);
}
write!(formatter, "{:.1} TiB", size)
}
}
pub struct CtrlC {
dummy_time: Instant,
trap: Trap
trap: Trap,
}
impl CtrlC {
@ -293,7 +285,6 @@ impl Default for CtrlC {
}
}
pub trait TimeSource: Sync + Copy + Send + 'static {
fn now() -> Time;
}
@ -336,7 +327,6 @@ impl TimeSource for MockTimeSource {
}
}
/// Helper function that multiplies the base62 data in buf[0..buflen] by 16 and adds m to it
fn base62_add_mult_16(buf: &mut [u8], mut buflen: usize, m: u8) -> usize {
let mut d: usize = m as usize;
@ -356,7 +346,7 @@ fn base62_add_mult_16(buf: &mut [u8], mut buflen: usize, m: u8) -> usize {
const BASE62: [char; 62] = [
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j',
'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z'
'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
];
pub fn to_base62(data: &[u8]) -> String {
@ -382,7 +372,7 @@ pub fn from_base62(data: &str) -> Result<Vec<u8>, char> {
'0'..='9' => ((c as usize) % ('0' as usize)),
'A'..='Z' => ((c as usize) % ('A' as usize)) + 10,
'a'..='z' => ((c as usize) % ('a' as usize)) + 36,
_ => return Err(c)
_ => return Err(c),
};
for item in &mut buf {
val += *item as usize * 62;
@ -397,11 +387,10 @@ pub fn from_base62(data: &str) -> Result<Vec<u8>, char> {
Ok(buf)
}
#[derive(Default)]
pub struct StatsdMsg {
entries: Vec<String>,
key: Vec<String>
key: Vec<String>,
}
impl StatsdMsg {
@ -426,6 +415,16 @@ impl StatsdMsg {
}
}
pub fn run_cmd(mut cmd: Command) {
match cmd.status() {
Ok(status) => {
if !status.success() {
error!("Command returned error: {:?}", status.code())
}
}
Err(e) => error!("Failed to execute command {:?}: {}", cmd, e),
}
}
#[test]
fn base62() {