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use std::collections::HashSet;
use std::collections::HashMap;
use regex::Regex;
use std::process::Command;
use std::rc::Rc;
pub struct Options {
pub options: HashSet<String>,
}
impl Options {
pub fn new(options_str: &str) -> Options {
let mut options = Options { options: HashSet::new() };
let re_space = Regex::new(r"\s+").unwrap();
for opt in re_space.split(&options_str) {
options.options.insert(opt.to_string());
}
return options;
}
pub fn as_ip(&self) -> String {
"".to_string()
}
}
enum RouteKind {
Via,
Dev,
}
pub struct Route {
dst: String,
pub dev: String,
options: Options,
via: Option<String>,
kind: RouteKind,
}
impl Route {
fn as_commands(&self, direction: &str) -> String {
match self.kind {
RouteKind::Via => {
let x = self.via.clone().unwrap_or("".to_string());
format!("ip route {} {} via {}{}",
&direction,
&self.dst,
&x,
self.options.as_ip())
}
RouteKind::Dev => {
format!("ip route {} {} dev {}{}",
direction,
&self.dst,
&self.dev,
self.options.as_ip())
}
}
}
}
pub struct IpRoute {
pub interfaces: HashMap<String, Vec<Rc<Route>>>,
pub routes: Vec<Rc<Route>>,
}
impl IpRoute {
pub fn as_commands(&self, direction: &str) -> Vec<String> {
println!("--1");
let mut ret: Vec<String> = Vec::new();
println!("--2");
for route in self.routes.iter() {
let cmd = route.as_commands(direction).clone();
println!("[{}]", &cmd);
ret.push(cmd)
}
println!("--3");
return ret;
}
fn add_route(&mut self, route: Rc<Route>) {
self.routes.push(route.clone());
let key = route.as_ref().dev.to_string();
let _vec = self.interfaces.entry(key).or_insert(Vec::new());
(*_vec).push(route.clone());
}
pub fn add_via(&mut self, dev: &str, dst: &str, via: Option<String>, options: &str) {
self.add_route(Rc::new(Route {
kind: RouteKind::Via,
dev: dev.to_string(),
dst: dst.to_string(),
via: via,
options: Options::new(options),
}));
}
pub fn add_dev(&mut self, dev: &str, dst: &str, options: &str) {
self.add_route(Rc::new(Route {
kind: RouteKind::Dev,
dst: dst.to_string(),
dev: dev.to_string(),
via: None,
options: Options::new(options),
}));
}
pub fn length(&self) -> usize {
return self.routes.len();
}
pub fn find(&self, name: &str) -> Option<&Vec<Rc<Route>>> {
return self.interfaces.get(&name.to_string());
}
}
pub fn parse_from_string(lines: &str) -> IpRoute {
let re_crnl = Regex::new(r"\s*[\n\r]+\s*").unwrap();
let re_dev_m = Regex::new(r"^([0-9a-fA-F\.:/]+)\s+dev\s+([a-z0-9\.]+)\s*(.*)$").unwrap();
let re_via_m = Regex::new(r"^([0-9a-fA-F\.:/]+|default)\s+via\s+([a-z0-9\.:]+)\s+dev\s+([a-z0-9\.]+)\s*(.*)$").unwrap();
let re_direct_m = Regex::new(r"^(blackhole)\s+([0-9a-fA-F\.:/]+)$").unwrap();
let re_unreachable_m = Regex::new(r"^(unreachable)\s+([0-9a-fA-F\.:/]+)\s+dev\s+([a-z0-9\.]+)\s+(.*)$").unwrap();
let mut ip_route = IpRoute {
routes: Vec::new(),
interfaces: HashMap::new(),
};
let mut split = re_crnl.split(lines);
loop {
match split.next() {
None => {
break;
}
Some(line) => {
if re_dev_m.is_match(line) {
for cap in re_dev_m.captures_iter(line) {
ip_route.add_dev(cap.at(2).unwrap(), cap.at(1).unwrap(), cap.at(3).unwrap())
}
} else {
if re_via_m.is_match(line) {
for cap in re_via_m.captures_iter(line) {
ip_route.add_via(cap.at(3).unwrap(),
cap.at(1).unwrap(),
Some(cap.at(2).unwrap().to_string()),
cap.at(4).unwrap())
}
} else {
if re_direct_m.is_match(line) {
for cap in re_direct_m.captures_iter(line) {
ip_route.add_via(cap.at(1).unwrap(), cap.at(2).unwrap(), None, &"")
}
} else {
if re_unreachable_m.is_match(line) {
for cap in re_unreachable_m.captures_iter(line) {
ip_route.add_dev(cap.at(3).unwrap(),
cap.at(2).unwrap(),
format!("{} {}",
&cap.at(2).unwrap(),
&cap.at(4).unwrap())
.as_str())
}
} else {
warn!("unknown line:{}", line)
}
}
}
}
}
}
}
ip_route
}
pub fn parse() -> IpRoute {
let out_6 = Command::new("ip").arg("-6").arg("route").arg("show").output().unwrap();
let out_4 = Command::new("ip").arg("-4").arg("route").arg("show").output().unwrap();
return parse_from_string(format!("{}{}",
&String::from_utf8_lossy(&out_4.stdout).into_owned(),
&String::from_utf8_lossy(&out_6.stdout).into_owned())
.as_str());
}