move proto and V4Mangle to hbb_common

src/lib.rs

@@ -1,5 +1,2 @@
 mod rendezvous_server;
 pub use rendezvous_server::*;
-#[path = "./protos/message.rs"]
-mod message_proto;
-pub use message_proto::*;

src/rendezvous_server.rs

@@ -1,53 +1,19 @@
-use super::message_proto::*;
 use bytes::{Bytes, BytesMut};
 use futures::SinkExt;
-use protobuf::{parse_from_bytes, Message as _};
+use hbb_common::{
+    message_proto::*,
+    protobuf::{parse_from_bytes, Message as _},
+    V4AddrMangle,
+};
 use std::{
     collections::HashMap,
     error::Error,
-    net::{Ipv4Addr, SocketAddr, SocketAddrV4},
-    time::{Duration, SystemTime, UNIX_EPOCH},
+    net::{SocketAddr, SocketAddrV4},
+    time::Duration,
 };
 use tokio::{net::UdpSocket, stream::StreamExt, time::delay_for};
 use tokio_util::{codec::BytesCodec, udp::UdpFramed};
 
-/// Certain router and firewalls scan the packet and if they
-/// find an IP address belonging to their pool that they use to do the NAT mapping/translation, so here we mangle the ip address
-
-pub struct V4AddrMangle();
-
-impl V4AddrMangle {
-    pub fn encode(addr: &SocketAddrV4) -> Vec<u8> {
-        let tm = (SystemTime::now()
-            .duration_since(UNIX_EPOCH)
-            .unwrap()
-            .as_micros() as u32) as u128;
-        let ip = u32::from_ne_bytes(addr.ip().octets()) as u128;
-        let port = addr.port() as u128;
-        let v = ((ip + tm) << 49) | (tm << 17) | (port + (tm & 0xFFFF));
-        let bytes = v.to_ne_bytes();
-        let mut n_padding = 0;
-        for i in bytes.iter().rev() {
-            if i == &0u8 {
-                n_padding += 1;
-            } else {
-                break;
-            }
-        }
-        bytes[..(16 - n_padding)].to_vec()
-    }
-
-    pub fn decode(bytes: &[u8]) -> SocketAddrV4 {
-        let mut padded = [0u8; 16];
-        padded[..bytes.len()].copy_from_slice(&bytes);
-        let number = u128::from_ne_bytes(padded);
-        let tm = (number >> 17) & (u32::max_value() as u128);
-        let ip = (((number >> 49) - tm) as u32).to_ne_bytes();
-        let port = (number & 0xFFFFFF) - (tm & 0xFFFF);
-        SocketAddrV4::new(Ipv4Addr::new(ip[0], ip[1], ip[2], ip[3]), port as u16)
-    }
-}
-
 pub struct Peer {
     socket_addr: SocketAddrV4,
 }
@@ -127,11 +93,6 @@ pub async fn sleep(sec: f32) {
 #[cfg(test)]
 mod tests {
     use super::*;
-    #[test]
-    fn test_mangle() {
-        let addr = SocketAddrV4::new(Ipv4Addr::new(192, 168, 16, 32), 21116);
-        assert_eq!(addr, V4AddrMangle::decode(&V4AddrMangle::encode(&addr)[..]));
-    }
 
     #[allow(unused_must_use)]
     #[tokio::main]