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use rsdsl_netlinkd::{addr, link, route};
use rsdsl_netlinkd::{Error, Result};
use std::fs::{self, File};
use std::net::{IpAddr, Ipv4Addr, Ipv6Addr};
use ipnet::Ipv6Net;
use rsdsl_ip_config::DsConfig;
use rsdsl_pd_config::PdConfig;
use signal_hook::{consts::SIGUSR1, iterator::Signals};
const ADDR_AFTR: Ipv4Addr = Ipv4Addr::new(192, 0, 0, 1);
const ADDR_B4: Ipv4Addr = Ipv4Addr::new(192, 0, 0, 2);
const LINK_LOCAL: Ipv6Addr = Ipv6Addr::new(0xfe80, 0, 0, 0, 0, 0, 0, 1);
fn main() -> Result<()> {
println!("[info] wait for eth0");
link::wait_exists("eth0".into())?;
println!("[info] detect eth0");
link::up("eth0".into())?;
configure_lan()?;
println!("[info] config eth0 10.128.0.254/24 fe80::1/64");
create_vlans()?;
configure_vlans()?;
println!("[info] config vlans 10.128.0.0/16 fe80::1/64");
fs::write("/proc/sys/net/ipv4/ip_forward", "1")?;
println!("[info] enable ipv4 routing");
fs::write("/proc/sys/net/ipv6/conf/all/forwarding", "1")?;
fs::write("/proc/sys/net/ipv6/conf/default/forwarding", "1")?;
println!("[info] enable ipv6 routing");
println!("[info] wait for eth1");
link::wait_exists("eth1".into())?;
println!("[info] detect eth1");
link::up("eth1".into())?;
configure_modem()?;
println!("[info] config eth1 192.168.1.2/24 (modem)");
let mut signals = Signals::new([SIGUSR1])?;
for _ in signals.forever() {
configure_wan_logged();
}
Ok(()) // unreachable
}
fn configure_lan() -> Result<()> {
addr::flush("eth0".into())?;
addr::add_link_local("eth0".into(), LINK_LOCAL.into(), 64)?;
addr::add("eth0".into(), "10.128.0.254".parse()?, 24)?;
Ok(())
}
fn create_vlans() -> Result<()> {
let zones = ["trusted", "untrusted", "isolated", "exposed"];
for (i, _) in zones.iter().enumerate() {
let vlan_id = 10 * (i + 1);
let vlan_name = format!("eth0.{}", vlan_id);
link::add_vlan(vlan_name.clone(), "eth0".to_string(), vlan_id as u16)?;
link::up(vlan_name.clone())?;
addr::flush(vlan_name.clone())?;
}
Ok(())
}
fn configure_vlans() -> Result<()> {
let zones = ["trusted", "untrusted", "isolated", "exposed"];
for (i, _) in zones.iter().enumerate() {
let vlan_id = 10 * (i + 1);
let vlan_name = format!("eth0.{}", vlan_id);
let vlan_addr = IpAddr::V4(Ipv4Addr::new(10, 128, vlan_id as u8, 254));
addr::add_link_local(vlan_name.clone(), LINK_LOCAL.into(), 64)?;
addr::add(vlan_name.clone(), vlan_addr, 24)?;
}
Ok(())
}
fn configure_modem() -> Result<()> {
addr::flush("eth1".into())?;
addr::add("eth1".into(), "192.168.1.2".parse()?, 24)?;
Ok(())
}
fn configure_wan_logged() {
match configure_wan() {
Ok(_) => {}
Err(e) => println!("[warn] config wan: {}", e),
}
}
fn configure_wan() -> Result<()> {
if let Some(ds_config) = read_ds_config_optional() {
link::set_mtu("ppp0".to_string(), 1492)?;
link::up("ppp0".to_string())?;
// Deconfigure everything, just to be safe.
addr::flush("ppp0".to_string())?;
route::flush("ppp0".to_string())?;
if let Some(v4) = ds_config.v4 {
addr::add("ppp0".to_string(), v4.addr.into(), 32)?;
route::add4(Ipv4Addr::UNSPECIFIED, 0, None, "ppp0".to_string())?;
println!("[info] config ppp0 {}/32", v4.addr);
}
if let Some(v6) = ds_config.v6 {
addr::add_link_local("ppp0".to_string(), v6.laddr.into(), 64)?;
route::add6(Ipv6Addr::UNSPECIFIED, 0, None, "ppp0".to_string())?;
println!("[info] config ppp0 ll {}/64", v6.laddr);
if let Some(pd_config) = read_pd_config_optional() {
let prefix = Ipv6Net::new(pd_config.prefix, pd_config.len)?.trunc();
let mut subnets = prefix.subnets(64)?;
let addr_wan = next_ifid1(&mut subnets)?;
addr::add("ppp0".to_string(), addr_wan.into(), 64)?;
println!("[info] config ppp0 gua {}/64", addr_wan);
let addr_lan = next_ifid1(&mut subnets)?;
addr::flush6("eth0".to_string())?;
addr::add_link_local("eth0".to_string(), LINK_LOCAL.into(), 64)?;
addr::add("eth0".to_string(), addr_lan.into(), 64)?;
println!("[info] config eth0 gua {}/64", addr_lan);
let zones = ["trusted", "untrusted", "isolated", "exposed"];
for (i, zone) in zones.iter().enumerate() {
let vlan_id = 10 * (i + 1);
let vlan_name = format!("eth0.{}", vlan_id);
let vlan_addr = next_ifid1(&mut subnets)?;
addr::flush6(vlan_name.clone())?;
addr::add_link_local(vlan_name.clone(), LINK_LOCAL.into(), 64)?;
addr::add(vlan_name.clone(), vlan_addr.into(), 64)?;
println!(
"[info] config {} gua {}/64 zone {}",
vlan_name, vlan_addr, zone
);
}
if link::exists("dslite0".to_string())? {
link::up("dslite0".to_string())?;
addr::flush("dslite0".to_string())?;
addr::add("dslite0".to_string(), ADDR_B4.into(), 29)?;
if ds_config.v4.is_none() {
route::add4(
Ipv4Addr::UNSPECIFIED,
0,
Some(ADDR_AFTR),
"dslite0".to_string(),
)?;
}
println!("[info] config dslite0 {}/29", ADDR_B4);
}
}
}
}
Ok(())
}
fn read_ds_config_optional() -> Option<DsConfig> {
let mut file = File::open(rsdsl_ip_config::LOCATION).ok()?;
serde_json::from_reader(&mut file).ok()
}
fn read_pd_config_optional() -> Option<PdConfig> {
let mut file = File::open(rsdsl_pd_config::LOCATION).ok()?;
serde_json::from_reader(&mut file).ok()
}
fn next_ifid1<T: Iterator<Item = Ipv6Net>>(subnets: &mut T) -> Result<Ipv6Addr> {
Ok((u128::from(subnets.next().ok_or(Error::NotEnoughIpv6Subnets)?.addr()) + 1).into())
}
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