test

3 files changed, 952 insertions, 4 deletions

diff --git a/Cargo.lock b/Cargo.lock
index 6c3d73a..15cdb74 100644
--- a/Cargo.lock
+++ b/Cargo.lock
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diff --git a/Cargo.toml b/Cargo.toml
index 912e6ec..6390dea 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,6 +3,7 @@ name = "rsdsl_radvd"
 version = "0.1.0"
 edition = "2021"
 
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
-
 [dependencies]
+pnet_packet = "0.33.0"
+rsdsl_netlinkd = { git = "https://github.com/rsdsl/netlinkd.git", version = "0.3.0" }
+socket2 = { version = "0.5.2", features = ["all"] }
diff --git a/src/main.rs b/src/main.rs
index e7a11a9..c199dce 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,81 @@
-fn main() {
-    println!("Hello, world!");
+use std::io::{self, Read};
+use std::net::{Ipv6Addr, SocketAddrV6};
+
+use pnet_packet::icmpv6::ndp::{MutableRouterAdvertPacket, NdpOption, NdpOptionType, RouterAdvert};
+use pnet_packet::icmpv6::{Icmpv6Code, Icmpv6Type};
+use rsdsl_netlinkd::error::Result;
+use rsdsl_netlinkd::link;
+use socket2::{Domain, Protocol, Socket, Type};
+
+fn main() -> Result<()> {
+    run("eth0".into())?;
+    Ok(())
+}
+
+fn run(link: String) -> Result<()> {
+    println!("[radvd] init {}", link);
+
+    let ifi = link::index(link.clone())?;
+
+    let mut sock = Socket::new(Domain::IPV6, Type::RAW, Some(Protocol::ICMPV6))?;
+
+    sock.join_multicast_v6(&Ipv6Addr::new(0xff02, 0, 0, 0, 0, 0, 0, 2), ifi)?;
+    sock.set_multicast_hops_v6(255)?;
+
+    send_ra_multicast(&sock, &link, ifi)?;
+
+    let mut buf = [0; 1500];
+    loop {
+        let n = sock.read(&mut buf)?;
+        let buf = &buf[..n];
+
+        // Router Solicitation
+        if buf[0] == 133 {
+            println!("[radvd] recv nd-rs on {}", link);
+            send_ra_multicast(&sock, &link, ifi)?;
+        }
+    }
+}
+
+fn send_ra_multicast(sock: &Socket, link: &str, ifi: u32) -> io::Result<()> {
+    let all_nodes = SocketAddrV6::new(Ipv6Addr::new(0xff02, 0, 0, 0, 0, 0, 0, 1), 0, 0, ifi).into();
+
+    let adv = RouterAdvert {
+        icmpv6_type: Icmpv6Type::new(134),
+        icmpv6_code: Icmpv6Code::new(0),
+        checksum: 0,
+        hop_limit: 64,
+        flags: 0,
+        lifetime: 1800,
+        reachable_time: 0,
+        retrans_time: 0,
+        options: vec![
+            NdpOption {
+                option_type: NdpOptionType::new(3),
+                length: 4,
+                data: vec![
+                    64, 0b11000000, 0, 0, 0, 30, 0, 0, 0, 20, 0, 0, 0, 0, 0x20, 0x01, 0xab, 0xab,
+                    0xab, 0xbe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+                ],
+            },
+            /*NdpOption {
+                option_type: NdpOptionType::new(25),
+                length: 3,
+                data: vec![
+                    0, 0, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+                    0, 1,
+                ],
+            },*/
+        ],
+        payload: vec![],
+    };
+
+    let mut buf = [0; 16 + 32];
+    let mut pkt = MutableRouterAdvertPacket::new(&mut buf).unwrap();
+    pkt.populate(&adv);
+
+    sock.send_to(&buf, &all_nodes)?;
+
+    println!("[radvd] send multicast nd-ra ::/64 on {}", link);
+    Ok(())
 }