feat(*) IPv6 support

fake-tcp/src/lib.rs

@@ -49,7 +49,7 @@ use pnet::packet::{tcp, Packet};
 use rand::prelude::*;
 use std::collections::{HashMap, HashSet};
 use std::fmt;
-use std::net::{Ipv4Addr, SocketAddrV4};
+use std::net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr};
 use std::sync::atomic::{AtomicU32, Ordering};
 use std::sync::{Arc, RwLock};
 use tokio::sync::broadcast;
@@ -65,12 +65,12 @@ const MAX_UNACKED_LEN: u32 = 128 * 1024 * 1024; // 128MB
 
 #[derive(Hash, Eq, PartialEq, Clone, Debug)]
 struct AddrTuple {
-    local_addr: SocketAddrV4,
+    local_addr: SocketAddr,
-    remote_addr: SocketAddrV4,
+    remote_addr: SocketAddr,
 }
 
 impl AddrTuple {
-    fn new(local_addr: SocketAddrV4, remote_addr: SocketAddrV4) -> AddrTuple {
+    fn new(local_addr: SocketAddr, remote_addr: SocketAddr) -> AddrTuple {
         AddrTuple {
             local_addr,
             remote_addr,
@@ -89,6 +89,7 @@ struct Shared {
 pub struct Stack {
     shared: Arc<Shared>,
     local_ip: Ipv4Addr,
+    local_ip6: Option<Ipv6Addr>,
     ready: mpsc::Receiver<Socket>,
 }
 
@@ -103,8 +104,8 @@ pub struct Socket {
     shared: Arc<Shared>,
     tun: Arc<Tun>,
     incoming: flume::Receiver<Bytes>,
-    local_addr: SocketAddrV4,
+    local_addr: SocketAddr,
-    remote_addr: SocketAddrV4,
+    remote_addr: SocketAddr,
     seq: AtomicU32,
     ack: AtomicU32,
     last_ack: AtomicU32,
@@ -122,8 +123,8 @@ impl Socket {
     fn new(
         shared: Arc<Shared>,
         tun: Arc<Tun>,
-        local_addr: SocketAddrV4,
+        local_addr: SocketAddr,
-        remote_addr: SocketAddrV4,
+        remote_addr: SocketAddr,
         ack: Option<u32>,
         state: State,
     ) -> (Socket, flume::Sender<Bytes>) {
@@ -188,7 +189,7 @@ impl Socket {
         match self.state {
             State::Established => {
                 self.incoming.recv_async().await.ok().and_then(|raw_buf| {
-                    let (_v4_packet, tcp_packet) = parse_ipv4_packet(&raw_buf);
+                    let (_v4_packet, tcp_packet) = parse_ip_packet(&raw_buf).unwrap();
 
                     if (tcp_packet.get_flags() & tcp::TcpFlags::RST) != 0 {
                         info!("Connection {} reset by peer", self);
@@ -233,7 +234,7 @@ impl Socket {
                     let res = time::timeout(TIMEOUT, self.incoming.recv_async()).await;
                     if let Ok(buf) = res {
                         let buf = buf.unwrap();
-                        let (_v4_packet, tcp_packet) = parse_ipv4_packet(&buf);
+                        let (_v4_packet, tcp_packet) = parse_ip_packet(&buf).unwrap();
 
                         if (tcp_packet.get_flags() & tcp::TcpFlags::RST) != 0 {
                             return;
@@ -277,7 +278,7 @@ impl Socket {
                     match time::timeout(TIMEOUT, self.incoming.recv_async()).await {
                         Ok(buf) => {
                             let buf = buf.unwrap();
-                            let (_v4_packet, tcp_packet) = parse_ipv4_packet(&buf);
+                            let (_v4_packet, tcp_packet) = parse_ip_packet(&buf).unwrap();
 
                             if (tcp_packet.get_flags() & tcp::TcpFlags::RST) != 0 {
                                 return None;
@@ -358,7 +359,7 @@ impl Stack {
     /// When more than one [`Tun`](tokio_tun::Tun) object is passed in, same amount
     /// of reader will be spawned later. This allows user to utilize the performance
     /// benefit of Multiqueue Tun support on machines with SMP.
-    pub fn new(tun: Vec<Tun>) -> Stack {
+    pub fn new(tun: Vec<Tun>, local_ip: Ipv4Addr, local_ip6: Option<Ipv6Addr>) -> Stack {
         let tun: Vec<Arc<Tun>> = tun.into_iter().map(Arc::new).collect();
         let (ready_tx, ready_rx) = mpsc::channel(MPSC_BUFFER_LEN);
         let (tuples_purge_tx, _tuples_purge_rx) = broadcast::channel(16);
@@ -369,7 +370,6 @@ impl Stack {
             ready: ready_tx,
             tuples_purge: tuples_purge_tx.clone(),
         });
-        let local_ip = tun[0].destination().unwrap();
 
         for t in tun {
             tokio::spawn(Stack::reader_task(
@@ -382,6 +382,7 @@ impl Stack {
         Stack {
             shared,
             local_ip,
+            local_ip6,
             ready: ready_rx,
         }
     }
@@ -398,10 +399,17 @@ impl Stack {
 
     /// Connects to the remote end. `None` returned means
     /// the connection attempt failed.
-    pub async fn connect(&mut self, addr: SocketAddrV4) -> Option<Socket> {
+    pub async fn connect(&mut self, addr: SocketAddr) -> Option<Socket> {
         let mut rng = SmallRng::from_entropy();
         let local_port: u16 = rng.gen_range(1024..65535);
-        let local_addr = SocketAddrV4::new(self.local_ip, local_port);
+        let local_addr = SocketAddr::new(
+            if addr.is_ipv4() {
+                IpAddr::V4(self.local_ip)
+            } else {
+                IpAddr::V6(self.local_ip6.expect("IPv6 local address undefined"))
+            },
+            local_port,
+        );
         let tuple = AddrTuple::new(local_addr, addr);
         let (mut sock, incoming) = Socket::new(
             self.shared.clone(),
@@ -437,15 +445,11 @@ impl Stack {
                     buf.truncate(size);
                     let buf = buf.freeze();
 
-                    if buf[0] >> 4 != 4 {
+                    match parse_ip_packet(&buf) {
-                        // not an IPv4 packet
+                        Some((ip_packet, tcp_packet)) => {
-                        continue;
-                    }
-
-                    let (ip_packet, tcp_packet) = parse_ipv4_packet(&buf);
                             let local_addr =
-                        SocketAddrV4::new(ip_packet.get_destination(), tcp_packet.get_destination());
+                                SocketAddr::new(ip_packet.get_destination(), tcp_packet.get_destination());
-                    let remote_addr = SocketAddrV4::new(ip_packet.get_source(), tcp_packet.get_source());
+                            let remote_addr = SocketAddr::new(ip_packet.get_source(), tcp_packet.get_source());
 
                             let tuple = AddrTuple::new(local_addr, remote_addr);
                             if let Some(c) = tuples.get(&tuple) {
@@ -457,7 +461,6 @@ impl Stack {
 
                                 // If not Ok, receiver has been closed and just fall through to the slow
                                 // path below
-
                             } else {
                                 trace!("Cache miss, checking the shared tuples table for connection");
                                 let sender = {
@@ -521,6 +524,11 @@ impl Stack {
                                 );
                                 shared.tun[0].try_send(&buf).unwrap();
                             }
+                        }
+                        None => {
+                            continue;
+                        }
+                    }
                 },
                 tuple = tuples_purge.recv() => {
                     let tuple = tuple.unwrap();

fake-tcp/src/packet.rs

@@ -1,45 +1,85 @@
 use bytes::{Bytes, BytesMut};
 use internet_checksum::Checksum;
 use pnet::packet::Packet;
-use pnet::packet::{ip, ipv4, tcp};
+use pnet::packet::{ip, ipv4, ipv6, tcp};
 use std::convert::TryInto;
-use std::net::SocketAddrV4;
+use std::net::{IpAddr, SocketAddr};
 
 const IPV4_HEADER_LEN: usize = 20;
+const IPV6_HEADER_LEN: usize = 40;
 const TCP_HEADER_LEN: usize = 20;
 pub const MAX_PACKET_LEN: usize = 1500;
 
+pub enum IPPacket<'p> {
+    V4(ipv4::Ipv4Packet<'p>),
+    V6(ipv6::Ipv6Packet<'p>),
+}
+
+impl<'a> IPPacket<'a> {
+    pub fn get_source(&self) -> IpAddr {
+        match self {
+            IPPacket::V4(p) => IpAddr::V4(p.get_source()),
+            IPPacket::V6(p) => IpAddr::V6(p.get_source()),
+        }
+    }
+
+    pub fn get_destination(&self) -> IpAddr {
+        match self {
+            IPPacket::V4(p) => IpAddr::V4(p.get_destination()),
+            IPPacket::V6(p) => IpAddr::V6(p.get_destination()),
+        }
+    }
+}
+
 pub fn build_tcp_packet(
-    local_addr: SocketAddrV4,
+    local_addr: SocketAddr,
-    remote_addr: SocketAddrV4,
+    remote_addr: SocketAddr,
     seq: u32,
     ack: u32,
     flags: u16,
     payload: Option<&[u8]>,
 ) -> Bytes {
+    let ip_header_len = match local_addr {
+        SocketAddr::V4(_) => IPV4_HEADER_LEN,
+        SocketAddr::V6(_) => IPV6_HEADER_LEN,
+    };
     let wscale = (flags & tcp::TcpFlags::SYN) != 0;
     let tcp_header_len = TCP_HEADER_LEN + if wscale { 4 } else { 0 }; // nop + wscale
     let tcp_total_len = tcp_header_len + payload.map_or(0, |payload| payload.len());
-    let total_len = IPV4_HEADER_LEN + tcp_total_len;
+    let total_len = ip_header_len + tcp_total_len;
     let mut buf = BytesMut::with_capacity(total_len);
     buf.resize(total_len, 0);
 
-    let mut v4_buf = buf.split_to(IPV4_HEADER_LEN);
+    let mut ip_buf = buf.split_to(ip_header_len);
     let mut tcp_buf = buf.split_to(tcp_total_len);
     assert_eq!(0, buf.len());
 
-    let mut v4 = ipv4::MutableIpv4Packet::new(&mut v4_buf).unwrap();
+    match (local_addr, remote_addr) {
+        (SocketAddr::V4(local), SocketAddr::V4(remote)) => {
+            let mut v4 = ipv4::MutableIpv4Packet::new(&mut ip_buf).unwrap();
             v4.set_version(4);
             v4.set_header_length(IPV4_HEADER_LEN as u8 / 4);
             v4.set_next_level_protocol(ip::IpNextHeaderProtocols::Tcp);
             v4.set_ttl(64);
-    v4.set_source(*local_addr.ip());
+            v4.set_source(*local.ip());
-    v4.set_destination(*remote_addr.ip());
+            v4.set_destination(*remote.ip());
             v4.set_total_length(total_len.try_into().unwrap());
             v4.set_flags(ipv4::Ipv4Flags::DontFragment);
             let mut cksm = Checksum::new();
             cksm.add_bytes(v4.packet());
             v4.set_checksum(u16::from_be_bytes(cksm.checksum()));
+        }
+        (SocketAddr::V6(local), SocketAddr::V6(remote)) => {
+            let mut v6 = ipv6::MutableIpv6Packet::new(&mut ip_buf).unwrap();
+            v6.set_version(6);
+            v6.set_payload_length(tcp_total_len.try_into().unwrap());
+            v6.set_next_header(ip::IpNextHeaderProtocols::Tcp);
+            v6.set_hop_limit(64);
+            v6.set_source(*local.ip());
+            v6.set_destination(*remote.ip());
+        }
+        _ => unreachable!(),
+    };
 
     let mut tcp = tcp::MutableTcpPacket::new(&mut tcp_buf).unwrap();
     tcp.set_window(0xffff);
@@ -59,24 +99,55 @@ pub fn build_tcp_packet(
     }
 
     let mut cksm = Checksum::new();
-    cksm.add_bytes(&local_addr.ip().octets());
-    cksm.add_bytes(&remote_addr.ip().octets());
     let ip::IpNextHeaderProtocol(tcp_protocol) = ip::IpNextHeaderProtocols::Tcp;
+
+    match (local_addr, remote_addr) {
+        (SocketAddr::V4(local), SocketAddr::V4(remote)) => {
+            cksm.add_bytes(&local.ip().octets());
+            cksm.add_bytes(&remote.ip().octets());
+
             let mut pseudo = [0u8, tcp_protocol, 0, 0];
             pseudo[2..].copy_from_slice(&(tcp_total_len as u16).to_be_bytes());
             cksm.add_bytes(&pseudo);
+        }
+        (SocketAddr::V6(local), SocketAddr::V6(remote)) => {
+            cksm.add_bytes(&local.ip().octets());
+            cksm.add_bytes(&remote.ip().octets());
+
+            let mut pseudo = [0u8, 0, 0, 0, 0, 0, 0, tcp_protocol];
+            pseudo[0..4].copy_from_slice(&(tcp_total_len as u32).to_be_bytes());
+            cksm.add_bytes(&pseudo);
+        }
+        _ => unreachable!(),
+    };
+
     cksm.add_bytes(tcp.packet());
     tcp.set_checksum(u16::from_be_bytes(cksm.checksum()));
 
-    v4_buf.unsplit(tcp_buf);
+    ip_buf.unsplit(tcp_buf);
-    v4_buf.freeze()
+    ip_buf.freeze()
 }
 
-pub fn parse_ipv4_packet(buf: &Bytes) -> (ipv4::Ipv4Packet, tcp::TcpPacket) {
+pub fn parse_ip_packet(buf: &Bytes) -> Option<(IPPacket, tcp::TcpPacket)> {
+    if buf[0] >> 4 == 4 {
         let v4 = ipv4::Ipv4Packet::new(buf).unwrap();
-    let tcp = tcp::TcpPacket::new(&buf[IPV4_HEADER_LEN..]).unwrap();
+        if v4.get_next_level_protocol() != ip::IpNextHeaderProtocols::Tcp {
+            return None;
+        }
 
-    (v4, tcp)
+        let tcp = tcp::TcpPacket::new(&buf[IPV4_HEADER_LEN..]).unwrap();
+        Some((IPPacket::V4(v4), tcp))
+    } else if buf[0] >> 4 == 6 {
+        let v6 = ipv6::Ipv6Packet::new(buf).unwrap();
+        if v6.get_next_header() != ip::IpNextHeaderProtocols::Tcp {
+            return None;
+        }
+
+        let tcp = tcp::TcpPacket::new(&buf[IPV6_HEADER_LEN..]).unwrap();
+        Some((IPPacket::V6(v6), tcp))
+    } else {
+        None
+    }
 }
 
 #[cfg(all(test, feature = "benchmark"))]

phantun/Cargo.toml

@@ -20,3 +20,5 @@ log = "0.4"
 pretty_env_logger = "0.4"
 tokio-tun = "0.5"
 num_cpus = "1.13"
+neli = "0.6"
+nix = "0.23"

phantun/src/bin/client.rs

@@ -2,7 +2,7 @@ use clap::{crate_version, Arg, Command};
 use fake_tcp::packet::MAX_PACKET_LEN;
 use fake_tcp::{Socket, Stack};
 use log::{debug, error, info};
-use phantun::utils::new_udp_reuseport;
+use phantun::utils::{assign_ipv6_address, new_udp_reuseport};
 use std::collections::HashMap;
 use std::io;
 use std::net::{Ipv4Addr, SocketAddr};
@@ -36,7 +36,7 @@ async fn main() -> io::Result<()> {
                 .long("remote")
                 .required(true)
                 .value_name("IP or HOST NAME:PORT")
-                .help("Sets the address or host name and port where Phantun Client connects to Phantun Server")
+                .help("Sets the address or host name and port where Phantun Client connects to Phantun Server, IPv6 address need to be specified as: \"[IPv6]:PORT\"")
                 .takes_value(true),
         )
         .arg(
@@ -53,7 +53,7 @@ async fn main() -> io::Result<()> {
                 .long("tun-local")
                 .required(false)
                 .value_name("IP")
-                .help("Sets the Tun interface local address (O/S's end)")
+                .help("Sets the Tun interface IPv4 local address (O/S's end)")
                 .default_value("192.168.200.1")
                 .takes_value(true),
         )
@@ -62,12 +62,41 @@ async fn main() -> io::Result<()> {
                 .long("tun-peer")
                 .required(false)
                 .value_name("IP")
-                .help("Sets the Tun interface destination (peer) address (Phantun Client's end). \
+                .help("Sets the Tun interface IPv4 destination (peer) address (Phantun Client's end). \
                        You will need to setup SNAT/MASQUERADE rules on your Internet facing interface \
                        in order for Phantun Client to connect to Phantun Server")
                 .default_value("192.168.200.2")
                 .takes_value(true),
         )
+        .arg(
+            Arg::new("ipv4_only")
+                .long("ipv4-only")
+                .short('4')
+                .required(false)
+                .help("Do not assign IPv6 addresses to Tun interface")
+                .takes_value(false)
+                .conflicts_with_all(&["tun_local6", "tun_peer6"]),
+        )
+        .arg(
+            Arg::new("tun_local6")
+                .long("tun-local6")
+                .required(false)
+                .value_name("IP")
+                .help("Sets the Tun interface IPv6 local address (O/S's end)")
+                .default_value("fec8::1")
+                .takes_value(true),
+        )
+        .arg(
+            Arg::new("tun_peer6")
+                .long("tun-peer6")
+                .required(false)
+                .value_name("IP")
+                .help("Sets the Tun interface IPv6 destination (peer) address (Phantun Client's end). \
+                       You will need to setup SNAT/MASQUERADE rules on your Internet facing interface \
+                       in order for Phantun Client to connect to Phantun Server")
+                .default_value("fec8::2")
+                .takes_value(true),
+        )
         .get_matches();
 
     let local_addr: SocketAddr = matches
@@ -76,16 +105,13 @@ async fn main() -> io::Result<()> {
         .parse()
         .expect("bad local address");
 
+    let ipv4_only = matches.is_present("ipv4_only");
+
     let remote_addr = tokio::net::lookup_host(matches.value_of("remote").unwrap())
         .await
         .expect("bad remote address or host")
-        .find(|addr| addr.is_ipv4())
+        .find(|addr| !ipv4_only || addr.is_ipv4())
-        .expect("unable to resolve remote host name or no valid A record was returned");
+        .expect("unable to resolve remote host name");
-    let remote_addr = if let SocketAddr::V4(addr) = remote_addr {
-        addr
-    } else {
-        unreachable!();
-    };
     info!("Remote address is: {}", remote_addr);
 
     let tun_local: Ipv4Addr = matches
@@ -99,11 +125,26 @@ async fn main() -> io::Result<()> {
         .parse()
         .expect("bad peer address for Tun interface");
 
+    let (tun_local6, tun_peer6) = if ipv4_only {
+        (None, None)
+    } else {
+        (
+            matches
+                .value_of("tun_local6")
+                .map(|v| v.parse().expect("bad local address for Tun interface")),
+            matches
+                .value_of("tun_peer6")
+                .map(|v| v.parse().expect("bad peer address for Tun interface")),
+        )
+    };
+
+    let tun_name = matches.value_of("tun").unwrap();
+
     let num_cpus = num_cpus::get();
     info!("{} cores available", num_cpus);
 
     let tun = TunBuilder::new()
-        .name(matches.value_of("tun").unwrap()) // if name is empty, then it is set by kernel.
+        .name(tun_name) // if name is empty, then it is set by kernel.
         .tap(false) // false (default): TUN, true: TAP.
         .packet_info(false) // false: IFF_NO_PI, default is true.
         .up() // or set it up manually using `sudo ip link set <tun-name> up`.
@@ -112,12 +153,16 @@ async fn main() -> io::Result<()> {
         .try_build_mq(num_cpus)
         .unwrap();
 
+    if remote_addr.is_ipv6() {
+        assign_ipv6_address(tun[0].name(), tun_local6.unwrap(), tun_peer6.unwrap());
+    }
+
     info!("Created TUN device {}", tun[0].name());
 
     let udp_sock = Arc::new(new_udp_reuseport(local_addr));
     let connections = Arc::new(RwLock::new(HashMap::<SocketAddr, Arc<Socket>>::new()));
 
-    let mut stack = Stack::new(tun);
+    let mut stack = Stack::new(tun, tun_peer, tun_peer6);
 
     let main_loop = tokio::spawn(async move {
         let mut buf_r = [0u8; MAX_PACKET_LEN];

phantun/src/bin/server.rs

@@ -2,7 +2,7 @@ use clap::{crate_version, Arg, Command};
 use fake_tcp::packet::MAX_PACKET_LEN;
 use fake_tcp::Stack;
 use log::{debug, error, info};
-use phantun::utils::new_udp_reuseport;
+use phantun::utils::{assign_ipv6_address, new_udp_reuseport};
 use std::io;
 use std::net::Ipv4Addr;
 use std::sync::Arc;
@@ -68,6 +68,35 @@ async fn main() -> io::Result<()> {
                 .default_value("192.168.201.2")
                 .takes_value(true),
         )
+        .arg(
+            Arg::new("ipv4_only")
+                .long("ipv4-only")
+                .short('4')
+                .required(false)
+                .help("Do not assign IPv6 addresses to Tun interface")
+                .takes_value(false)
+                .conflicts_with_all(&["tun_local6", "tun_peer6"]),
+        )
+        .arg(
+            Arg::new("tun_local6")
+                .long("tun-local6")
+                .required(false)
+                .value_name("IP")
+                .help("Sets the Tun interface IPv6 local address (O/S's end)")
+                .default_value("fec9::1")
+                .takes_value(true),
+        )
+        .arg(
+            Arg::new("tun_peer6")
+                .long("tun-peer6")
+                .required(false)
+                .value_name("IP")
+                .help("Sets the Tun interface IPv6 destination (peer) address (Phantun Client's end). \
+                       You will need to setup SNAT/MASQUERADE rules on your Internet facing interface \
+                       in order for Phantun Client to connect to Phantun Server")
+                .default_value("fec9::2")
+                .takes_value(true),
+        )
         .get_matches();
 
     let local_port: u16 = matches
@@ -94,11 +123,26 @@ async fn main() -> io::Result<()> {
         .parse()
         .expect("bad peer address for Tun interface");
 
+    let (tun_local6, tun_peer6) = if matches.is_present("ipv4_only") {
+        (None, None)
+    } else {
+        (
+            matches
+                .value_of("tun_local6")
+                .map(|v| v.parse().expect("bad local address for Tun interface")),
+            matches
+                .value_of("tun_peer6")
+                .map(|v| v.parse().expect("bad peer address for Tun interface")),
+        )
+    };
+
+    let tun_name = matches.value_of("tun").unwrap();
+
     let num_cpus = num_cpus::get();
     info!("{} cores available", num_cpus);
 
     let tun = TunBuilder::new()
-        .name(matches.value_of("tun").unwrap()) // if name is empty, then it is set by kernel.
+        .name(tun_name) // if name is empty, then it is set by kernel.
         .tap(false) // false (default): TUN, true: TAP.
         .packet_info(false) // false: IFF_NO_PI, default is true.
         .up() // or set it up manually using `sudo ip link set <tun-name> up`.
@@ -107,10 +151,14 @@ async fn main() -> io::Result<()> {
         .try_build_mq(num_cpus)
         .unwrap();
 
+    if let (Some(tun_local6), Some(tun_peer6)) = (tun_local6, tun_peer6) {
+        assign_ipv6_address(tun[0].name(), tun_local6, tun_peer6);
+    }
+
     info!("Created TUN device {}", tun[0].name());
 
     //thread::sleep(time::Duration::from_secs(5));
-    let mut stack = Stack::new(tun);
+    let mut stack = Stack::new(tun, tun_local, tun_local6);
     stack.listen(local_port);
     info!("Listening on {}", local_port);
 

phantun/src/utils.rs

@@ -1,4 +1,15 @@
-use std::net::SocketAddr;
+use neli::{
+    consts::{
+        nl::{NlmF, NlmFFlags},
+        rtnl::{Ifa, IfaFFlags, RtAddrFamily, Rtm},
+        socket::NlFamily,
+    },
+    nl::{NlPayload, Nlmsghdr},
+    rtnl::{Ifaddrmsg, Rtattr},
+    socket::NlSocketHandle,
+    types::RtBuffer,
+};
+use std::net::{Ipv6Addr, SocketAddr};
 use tokio::net::UdpSocket;
 
 pub fn new_udp_reuseport(local_addr: SocketAddr) -> UdpSocket {
@@ -20,3 +31,30 @@ pub fn new_udp_reuseport(local_addr: SocketAddr) -> UdpSocket {
     let udp_sock: std::net::UdpSocket = udp_sock.into();
     udp_sock.try_into().unwrap()
 }
+
+pub fn assign_ipv6_address(device_name: &str, local: Ipv6Addr, peer: Ipv6Addr) {
+    let index = nix::net::if_::if_nametoindex(device_name).unwrap();
+
+    let mut rtnl = NlSocketHandle::connect(NlFamily::Route, None, &[]).unwrap();
+    let mut rtattrs = RtBuffer::new();
+    rtattrs.push(Rtattr::new(None, Ifa::Local, &local.octets()[..]).unwrap());
+    rtattrs.push(Rtattr::new(None, Ifa::Address, &peer.octets()[..]).unwrap());
+
+    let ifaddrmsg = Ifaddrmsg {
+        ifa_family: RtAddrFamily::Inet6,
+        ifa_prefixlen: 128,
+        ifa_flags: IfaFFlags::empty(),
+        ifa_scope: 0,
+        ifa_index: index as i32,
+        rtattrs,
+    };
+    let nl_header = Nlmsghdr::new(
+        None,
+        Rtm::Newaddr,
+        NlmFFlags::new(&[NlmF::Request]),
+        None,
+        None,
+        NlPayload::Payload(ifaddrmsg),
+    );
+    rtnl.send(nl_header).unwrap();
+}