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|
use hex::FromHex;
use x25519_dalek::{PublicKey, StaticSecret};
use super::{ConfigError, Configuration};
struct StreamPeer {
public_key: PublicKey,
update_only: bool,
added: bool,
}
struct StreamParser<C: Configuration> {
config: C,
update_only: bool,
peer: Option<StreamPeer>,
}
impl<C: Configuration> StreamParser<C> {
fn parse_interface_line(&mut self, key: &str, value: &str) -> (bool, Option<ConfigError>) {
let err = match key {
"private_key" => match <[u8; 32]>::from_hex(value) {
Ok(sk) => {
self.config.set_private_key(if sk == [0u8; 32] {
None
} else {
Some(StaticSecret::from(sk))
});
None
}
Err(_) => Some(ConfigError::InvalidHexValue),
},
"listen_port" => match value.parse() {
Ok(port) => {
self.config.set_listen_port(Some(port));
None
}
Err(_) => Some(ConfigError::InvalidPortNumber),
},
"fwmark" => match value.parse() {
Ok(fwmark) => {
self.config
.set_fwmark(if fwmark == 0 { None } else { Some(fwmark) });
None
}
Err(_) => Some(ConfigError::InvalidFwmark),
},
"replace_peers" => match value {
"true" => {
for p in self.config.get_peers() {
self.config.remove_peer(&p.public_key)
}
None
}
_ => Some(ConfigError::UnsupportedValue),
},
// transition to peer configuration
"public_key" => {
return (true, None);
}
// unknown key
_ => Some(ConfigError::InvalidKey),
};
(false, err)
}
fn parse_peer_line(&mut self, key: &str, value: &str) -> Option<ConfigError> {
// add a p
let mut flush_peer = || match self.peer.as_mut() {
None => (),
Some(peer) => {
if !peer.added {
peer.added = true;
if !peer.update_only {
self.config.add_peer(&peer.public_key);
}
}
}
};
match key {
// new peer
"public_key" => {
// add previous peer
flush_peer();
// create state for new peer
match <[u8; 32]>::from_hex(value) {
Ok(pk) => {
self.peer = Some(StreamPeer {
public_key: PublicKey::from(pk),
update_only: false,
added: false,
});
None
}
Err(_) => Some(ConfigError::InvalidHexValue),
}
}
"remove" => {
let peer = self.peer.as_ref().unwrap();
self.config.remove_peer(&peer.public_key);
None
}
"update_only" => {
let peer = self.peer.as_mut().unwrap();
peer.update_only = true;
None
}
"preshared_key" => {
// add peer (if not exists)
let peer = self.peer.as_mut().unwrap();
if !peer.added && !peer.update_only {
self.config.add_peer(&peer.public_key);
peer.added = true;
}
// set preshared key
match <[u8; 32]>::from_hex(value) {
Ok(psk) => {
self.config.set_preshared_key(
&peer.public_key,
if psk == [0u8; 32] { None } else { Some(psk) },
);
None
}
Err(_) => Some(ConfigError::InvalidHexValue),
}
}
"endpoint" => None,
"persistent_keepalive_interval" => None,
"replace_allowed_ips" => None,
"allowed_ip" => None,
// set protocol version of peer
"protocol_version" => {
let parse_res: Result<usize, _> = value.parse();
match parse_res {
Ok(version) => {
if version == 0 || version > self.config.get_protocol_version() {
Some(ConfigError::UnsupportedProtocolVersion)
} else {
None
}
}
Err(_) => Some(ConfigError::UnsupportedProtocolVersion),
}
}
// unknown key
_ => Some(ConfigError::InvalidKey),
}
}
}
|
