vpncloud/src/types.rs

249 lines
7.4 KiB
Rust

// VpnCloud - Peer-to-Peer VPN
// Copyright (C) 2015-2016 Dennis Schwerdel
// This software is licensed under GPL-3 or newer (see LICENSE.md)
use std::net::{SocketAddr, Ipv4Addr, Ipv6Addr};
use std::hash::Hasher;
use std::fmt;
use std::str::FromStr;
use super::util::{bytes_to_hex, Encoder};
pub const NODE_ID_BYTES: usize = 16;
pub type NetworkId = u64;
pub type NodeId = [u8; NODE_ID_BYTES];
#[derive(PartialOrd, Eq, Ord, Clone, Hash, Copy)]
pub struct Address {
pub data: [u8; 16],
pub len: u8
}
impl Address {
#[inline]
pub fn read_from(data: &[u8]) -> Result<(Address, usize), Error> {
if data.len() < 1 {
return Err(Error::ParseError("Address too short"));
}
let len = data[0] as usize;
let addr = try!(Address::read_from_fixed(&data[1..], len));
Ok((addr, len + 1))
}
#[inline]
pub fn read_from_fixed(data: &[u8], len: usize) -> Result<Address, Error> {
if len > 16 {
return Err(Error::ParseError("Invalid address, too long"));
}
if data.len() < len {
return Err(Error::ParseError("Address too short"));
}
let mut bytes = [0; 16];
for i in 0..len {
bytes[i] = data[i];
}
Ok(Address{data: bytes, len: len as u8})
}
#[inline]
pub fn write_to(&self, data: &mut[u8]) -> usize {
assert!(data.len() >= self.len as usize + 1);
data[0] = self.len;
for i in 0..self.len as usize {
data[i+1] = self.data[i];
}
self.len as usize + 1
}
}
impl PartialEq for Address {
#[inline]
fn eq(&self, rhs: &Self) -> bool {
if self.len != rhs.len {
return false;
}
for i in 0..self.len as usize {
if self.data[i] != rhs.data[i] {
return false;
}
}
true
}
}
impl fmt::Display for Address {
fn fmt(&self, formatter: &mut fmt::Formatter) -> Result<(), fmt::Error> {
let d = &self.data;
match self.len {
4 => write!(formatter, "{}.{}.{}.{}", d[0], d[1], d[2], d[3]),
6 => write!(formatter, "{:02x}:{:02x}:{:02x}:{:02x}:{:02x}:{:02x}",
d[0], d[1], d[2], d[3], d[4], d[5]),
8 => {
let vlan = Encoder::read_u16(&d[0..2]);
write!(formatter, "vlan{}/{:02x}:{:02x}:{:02x}:{:02x}:{:02x}:{:02x}",
vlan, d[2], d[3], d[4], d[5], d[6], d[7])
},
16 => write!(formatter, "{:02x}{:02x}:{:02x}{:02x}:{:02x}{:02x}:{:02x}{:02x}:{:02x}{:02x}:{:02x}{:02x}:{:02x}{:02x}:{:02x}{:02x}",
d[0], d[1], d[2], d[3], d[4], d[5], d[6], d[7], d[8], d[9], d[10], d[11], d[12], d[13], d[14], d[15]),
_ => write!(formatter, "{}", bytes_to_hex(&d[0..self.len as usize]))
}
}
}
impl fmt::Debug for Address {
fn fmt(&self, formatter: &mut fmt::Formatter) -> Result<(), fmt::Error> {
write!(formatter, "{}", self)
}
}
impl FromStr for Address {
type Err=Error;
fn from_str(text: &str) -> Result<Self, Self::Err> {
if let Ok(addr) = Ipv4Addr::from_str(text) {
let ip = addr.octets();
let mut res = [0; 16];
for i in 0..4 {
res[i] = ip[i];
}
return Ok(Address{data: res, len: 4});
}
if let Ok(addr) = Ipv6Addr::from_str(text) {
let segments = addr.segments();
let mut res = [0; 16];
for i in 0..8 {
Encoder::write_u16(segments[i], &mut res[2*i..]);
}
return Ok(Address{data: res, len: 16});
}
let parts: Vec<&str> = text.split(':').collect();
if parts.len() == 6 {
let mut bytes = [0; 16];
for i in 0..6 {
bytes[i] = try!(u8::from_str_radix(&parts[i], 16).map_err(|_| Error::ParseError("Failed to parse mac")));
}
return Ok(Address{data: bytes, len: 6});
}
return Err(Error::ParseError("Failed to parse address"))
}
}
#[derive(PartialEq, PartialOrd, Eq, Ord, Hash, Clone, Copy)]
pub struct Range {
pub base: Address,
pub prefix_len: u8
}
impl Range {
#[inline]
pub fn read_from(data: &[u8]) -> Result<(Range, usize), Error> {
let (address, read) = try!(Address::read_from(data));
if data.len() < read + 1 {
return Err(Error::ParseError("Range too short"));
}
let prefix_len = data[read];
Ok((Range{base: address, prefix_len: prefix_len}, read + 1))
}
#[inline]
pub fn write_to(&self, data: &mut[u8]) -> usize {
let pos = self.base.write_to(data);
assert!(data.len() >= pos + 1);
data[pos] = self.prefix_len;
pos + 1
}
}
impl FromStr for Range {
type Err=Error;
fn from_str(text: &str) -> Result<Self, Self::Err> {
let pos = match text.find("/") {
Some(pos) => pos,
None => return Err(Error::ParseError("Invalid range format"))
};
let prefix_len = try!(u8::from_str(&text[pos+1..])
.map_err(|_| Error::ParseError("Failed to parse prefix length")));
let base = try!(Address::from_str(&text[..pos]));
Ok(Range{base: base, prefix_len: prefix_len})
}
}
impl fmt::Display for Range {
fn fmt(&self, formatter: &mut fmt::Formatter) -> Result<(), fmt::Error> {
write!(formatter, "{}/{}", self.base, self.prefix_len)
}
}
impl fmt::Debug for Range {
fn fmt(&self, formatter: &mut fmt::Formatter) -> Result<(), fmt::Error> {
write!(formatter, "{}", self)
}
}
#[derive(RustcDecodable, Debug, Clone, Copy)]
pub enum Type {
Tun, Tap
}
impl fmt::Display for Type {
fn fmt(&self, formatter: &mut fmt::Formatter) -> Result<(), fmt::Error> {
match self {
&Type::Tun => write!(formatter, "tun"),
&Type::Tap => write!(formatter, "tap"),
}
}
}
#[derive(RustcDecodable, Debug, Clone, Copy)]
pub enum Mode {
Normal, Hub, Switch, Router
}
impl fmt::Display for Mode {
fn fmt(&self, formatter: &mut fmt::Formatter) -> Result<(), fmt::Error> {
match self {
&Mode::Normal => write!(formatter, "normal"),
&Mode::Hub => write!(formatter, "hub"),
&Mode::Switch => write!(formatter, "switch"),
&Mode::Router => write!(formatter, "router"),
}
}
}
pub trait Table {
fn learn(&mut self, Address, Option<u8>, SocketAddr);
fn lookup(&mut self, &Address) -> Option<SocketAddr>;
fn housekeep(&mut self);
fn remove_all(&mut self, SocketAddr);
}
pub trait Protocol: Sized {
fn parse(&[u8]) -> Result<(Address, Address), Error>;
}
#[derive(Debug, PartialEq)]
pub enum Error {
ParseError(&'static str),
WrongNetwork(Option<NetworkId>),
SocketError(&'static str),
TunTapDevError(&'static str),
CryptoError(&'static str)
}
impl fmt::Display for Error {
fn fmt(&self, formatter: &mut fmt::Formatter) -> Result<(), fmt::Error> {
match self {
&Error::ParseError(ref msg) => write!(formatter, "{}", msg),
&Error::SocketError(ref msg) => write!(formatter, "{}", msg),
&Error::TunTapDevError(ref msg) => write!(formatter, "{}", msg),
&Error::CryptoError(ref msg) => write!(formatter, "{}", msg),
&Error::WrongNetwork(Some(net)) => write!(formatter, "wrong network id: {}", net),
&Error::WrongNetwork(None) => write!(formatter, "wrong network id: none"),
}
}
}