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// Copyright 2019 Hristo Venev
//
// See COPYING.
use crate::{config, model, proto};
use std::{error, fmt};
use std::collections::hash_map;
#[derive(Debug)]
pub struct ConfigError {
pub url: String,
pub peer: model::Key,
pub important: bool,
err: &'static str,
}
impl ConfigError {
fn new(err: &'static str, s: &config::Source, p: &proto::Peer, important: bool) -> Self {
ConfigError {
url: s.url.clone(),
peer: p.public_key.clone(),
important,
err,
}
}
}
impl error::Error for ConfigError {}
impl fmt::Display for ConfigError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(
f,
"{} [{}] from [{}]: {}",
if self.important {
"Invalid peer"
} else {
"Misconfigured peer"
},
self.peer,
self.url,
self.err
)
}
}
pub struct ConfigBuilder<'a> {
c: model::Config,
err: Vec<ConfigError>,
public_key: model::Key,
pc: &'a config::PeerConfig,
}
impl<'a> ConfigBuilder<'a> {
#[inline]
pub fn new(public_key: model::Key, pc: &'a config::PeerConfig) -> Self {
ConfigBuilder {
c: model::Config::default(),
err: vec![],
public_key,
pc,
}
}
#[inline]
pub fn build(self) -> (model::Config, Vec<ConfigError>) {
(self.c, self.err)
}
#[inline]
pub fn add_server(
&mut self,
s: &config::Source,
p: &proto::Server,
) {
if p.peer.public_key == self.public_key {
return;
}
let pc = self.pc;
let ent = insert_peer(&mut self.c, &mut self.err, s, &p.peer, |ent| {
ent.psk = s.psk.clone();
ent.endpoint = Some(p.endpoint.clone());
ent.keepalive = pc.fix_keepalive(p.keepalive);
});
add_peer(&mut self.err, ent, s, &p.peer)
}
#[inline]
pub fn add_road_warrior(
&mut self,
s: &config::Source,
p: &proto::RoadWarrior,
) {
if p.peer.public_key == self.public_key {
self.err.push(ConfigError::new("The local peer cannot be a road warrior", s, &p.peer, true));
return;
}
let ent = if p.base == self.public_key {
insert_peer(&mut self.c, &mut self.err, s, &p.peer, |_| {})
} else {
match self.c.peers.get_mut(&p.base) {
Some(ent) => ent,
None => {
self.err.push(ConfigError::new("Unknown base peer", s, &p.peer, true));
return;
}
}
};
add_peer(&mut self.err, ent, s, &p.peer)
}
}
#[inline]
fn insert_peer<'b>(
c: &'b mut model::Config,
err: &mut Vec<ConfigError>,
s: &config::Source,
p: &proto::Peer,
update: impl for<'c> FnOnce(&'c mut model::Peer) -> (),
) -> &'b mut model::Peer {
match c.peers.entry(p.public_key.clone()) {
hash_map::Entry::Occupied(ent) => {
err.push(ConfigError::new("Duplicate public key", s, p, true));
ent.into_mut()
}
hash_map::Entry::Vacant(ent) => {
let ent = ent.insert(model::Peer {
endpoint: None,
psk: None,
keepalive: 0,
ipv4: vec![],
ipv6: vec![],
});
update(ent);
ent
}
}
}
fn add_peer(err: &mut Vec<ConfigError>, ent: &mut model::Peer, s: &config::Source, p: &proto::Peer) {
let mut added = false;
let mut removed = false;
for i in p.ipv4.iter() {
if s.ipv4.contains(i) {
ent.ipv4.push(*i);
added = true;
} else {
removed = true;
}
}
for i in p.ipv6.iter() {
if s.ipv6.contains(i) {
ent.ipv6.push(*i);
added = true;
} else {
removed = true;
}
}
if removed {
let msg = if added {
"Some IPs removed"
} else {
"All IPs removed"
};
err.push(ConfigError::new(msg, s, p, !added));
}
}
|
