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Cargo.toml

@@ -7,7 +7,13 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-p2p = { path = "libs/p2p" }
+tokio = { version = "0.2", features = ["full"] }
+protobuf = "2.10"
+tokio-util = { version = "0.3", features = ["full"] }
+log = "0.4"
+env_logger = "0.7"
+futures = "0.3"
+bytes = "0.5"
 
-[workspace]
-members = ["libs/p2p"]
+[build-dependencies]
+protobuf-codegen-pure = "2.10"

build.rs

@@ -0,0 +1,10 @@
+fn main() {
+    protobuf_codegen_pure::run(protobuf_codegen_pure::Args {
+        out_dir: "src/protos",
+        input: &["protos/message.proto"],
+        includes: &["protos"],
+        customize: protobuf_codegen_pure::Customize {
+            ..Default::default()
+        },
+    }).unwrap();
+}

libs/p2p

@@ -1 +0,0 @@
-Subproject commit 24cffa9777c7984a4e78e933e78507e63e5527d2

protos/message.proto

@@ -0,0 +1,9 @@
+syntax = "proto3";
+package hbb;
+
+message Message {
+  string addr = 1; // hbb address
+  oneof union {
+    bytes socket_addr = 6;
+  }
+}

protos/mod.rs

@@ -0,0 +1,2 @@
+mod message;
+pub use message::*;

src/lib.rs

@@ -0,0 +1,5 @@
+mod rendezvous_server;
+pub use rendezvous_server::*;
+#[path = "./protos/message.rs"]
+mod message_proto;
+pub use message_proto::*;

src/main.rs

@@ -1,3 +1,12 @@
-fn main() {
-    println!("Hello, world!");
-}
+// https://tools.ietf.org/rfc/rfc5128.txt
+// https://blog.csdn.net/bytxl/article/details/44344855
+
+use hbbs::*;
+use std::error::Error;
+
+#[tokio::main]
+async fn main() -> Result<(), Box<dyn Error>> {
+    env_logger::init();
+    RendezvousServer::start("0.0.0.0:21116").await?;
+    Ok(())
+}

src/protos/message.rs

@@ -0,0 +1,301 @@
+// This file is generated by rust-protobuf 2.10.2. Do not edit
+// @generated
+
+// https://github.com/rust-lang/rust-clippy/issues/702
+#![allow(unknown_lints)]
+#![allow(clippy::all)]
+
+#![cfg_attr(rustfmt, rustfmt_skip)]
+
+#![allow(box_pointers)]
+#![allow(dead_code)]
+#![allow(missing_docs)]
+#![allow(non_camel_case_types)]
+#![allow(non_snake_case)]
+#![allow(non_upper_case_globals)]
+#![allow(trivial_casts)]
+#![allow(unsafe_code)]
+#![allow(unused_imports)]
+#![allow(unused_results)]
+//! Generated file from `message.proto`
+
+use protobuf::Message as Message_imported_for_functions;
+use protobuf::ProtobufEnum as ProtobufEnum_imported_for_functions;
+
+/// Generated files are compatible only with the same version
+/// of protobuf runtime.
+// const _PROTOBUF_VERSION_CHECK: () = ::protobuf::VERSION_2_10_2;
+
+#[derive(PartialEq,Clone,Default)]
+pub struct Message {
+    // message fields
+    pub addr: ::std::string::String,
+    // message oneof groups
+    pub union: ::std::option::Option<Message_oneof_union>,
+    // special fields
+    pub unknown_fields: ::protobuf::UnknownFields,
+    pub cached_size: ::protobuf::CachedSize,
+}
+
+impl<'a> ::std::default::Default for &'a Message {
+    fn default() -> &'a Message {
+        <Message as ::protobuf::Message>::default_instance()
+    }
+}
+
+#[derive(Clone,PartialEq,Debug)]
+pub enum Message_oneof_union {
+    socket_addr(::std::vec::Vec<u8>),
+}
+
+impl Message {
+    pub fn new() -> Message {
+        ::std::default::Default::default()
+    }
+
+    // string addr = 1;
+
+
+    pub fn get_addr(&self) -> &str {
+        &self.addr
+    }
+    pub fn clear_addr(&mut self) {
+        self.addr.clear();
+    }
+
+    // Param is passed by value, moved
+    pub fn set_addr(&mut self, v: ::std::string::String) {
+        self.addr = v;
+    }
+
+    // Mutable pointer to the field.
+    // If field is not initialized, it is initialized with default value first.
+    pub fn mut_addr(&mut self) -> &mut ::std::string::String {
+        &mut self.addr
+    }
+
+    // Take field
+    pub fn take_addr(&mut self) -> ::std::string::String {
+        ::std::mem::replace(&mut self.addr, ::std::string::String::new())
+    }
+
+    // bytes socket_addr = 6;
+
+
+    pub fn get_socket_addr(&self) -> &[u8] {
+        match self.union {
+            ::std::option::Option::Some(Message_oneof_union::socket_addr(ref v)) => v,
+            _ => &[],
+        }
+    }
+    pub fn clear_socket_addr(&mut self) {
+        self.union = ::std::option::Option::None;
+    }
+
+    pub fn has_socket_addr(&self) -> bool {
+        match self.union {
+            ::std::option::Option::Some(Message_oneof_union::socket_addr(..)) => true,
+            _ => false,
+        }
+    }
+
+    // Param is passed by value, moved
+    pub fn set_socket_addr(&mut self, v: ::std::vec::Vec<u8>) {
+        self.union = ::std::option::Option::Some(Message_oneof_union::socket_addr(v))
+    }
+
+    // Mutable pointer to the field.
+    pub fn mut_socket_addr(&mut self) -> &mut ::std::vec::Vec<u8> {
+        if let ::std::option::Option::Some(Message_oneof_union::socket_addr(_)) = self.union {
+        } else {
+            self.union = ::std::option::Option::Some(Message_oneof_union::socket_addr(::std::vec::Vec::new()));
+        }
+        match self.union {
+            ::std::option::Option::Some(Message_oneof_union::socket_addr(ref mut v)) => v,
+            _ => panic!(),
+        }
+    }
+
+    // Take field
+    pub fn take_socket_addr(&mut self) -> ::std::vec::Vec<u8> {
+        if self.has_socket_addr() {
+            match self.union.take() {
+                ::std::option::Option::Some(Message_oneof_union::socket_addr(v)) => v,
+                _ => panic!(),
+            }
+        } else {
+            ::std::vec::Vec::new()
+        }
+    }
+}
+
+impl ::protobuf::Message for Message {
+    fn is_initialized(&self) -> bool {
+        true
+    }
+
+    fn merge_from(&mut self, is: &mut ::protobuf::CodedInputStream<'_>) -> ::protobuf::ProtobufResult<()> {
+        while !is.eof()? {
+            let (field_number, wire_type) = is.read_tag_unpack()?;
+            match field_number {
+                1 => {
+                    ::protobuf::rt::read_singular_proto3_string_into(wire_type, is, &mut self.addr)?;
+                },
+                6 => {
+                    if wire_type != ::protobuf::wire_format::WireTypeLengthDelimited {
+                        return ::std::result::Result::Err(::protobuf::rt::unexpected_wire_type(wire_type));
+                    }
+                    self.union = ::std::option::Option::Some(Message_oneof_union::socket_addr(is.read_bytes()?));
+                },
+                _ => {
+                    ::protobuf::rt::read_unknown_or_skip_group(field_number, wire_type, is, self.mut_unknown_fields())?;
+                },
+            };
+        }
+        ::std::result::Result::Ok(())
+    }
+
+    // Compute sizes of nested messages
+    #[allow(unused_variables)]
+    fn compute_size(&self) -> u32 {
+        let mut my_size = 0;
+        if !self.addr.is_empty() {
+            my_size += ::protobuf::rt::string_size(1, &self.addr);
+        }
+        if let ::std::option::Option::Some(ref v) = self.union {
+            match v {
+                &Message_oneof_union::socket_addr(ref v) => {
+                    my_size += ::protobuf::rt::bytes_size(6, &v);
+                },
+            };
+        }
+        my_size += ::protobuf::rt::unknown_fields_size(self.get_unknown_fields());
+        self.cached_size.set(my_size);
+        my_size
+    }
+
+    fn write_to_with_cached_sizes(&self, os: &mut ::protobuf::CodedOutputStream<'_>) -> ::protobuf::ProtobufResult<()> {
+        if !self.addr.is_empty() {
+            os.write_string(1, &self.addr)?;
+        }
+        if let ::std::option::Option::Some(ref v) = self.union {
+            match v {
+                &Message_oneof_union::socket_addr(ref v) => {
+                    os.write_bytes(6, v)?;
+                },
+            };
+        }
+        os.write_unknown_fields(self.get_unknown_fields())?;
+        ::std::result::Result::Ok(())
+    }
+
+    fn get_cached_size(&self) -> u32 {
+        self.cached_size.get()
+    }
+
+    fn get_unknown_fields(&self) -> &::protobuf::UnknownFields {
+        &self.unknown_fields
+    }
+
+    fn mut_unknown_fields(&mut self) -> &mut ::protobuf::UnknownFields {
+        &mut self.unknown_fields
+    }
+
+    fn as_any(&self) -> &dyn (::std::any::Any) {
+        self as &dyn (::std::any::Any)
+    }
+    fn as_any_mut(&mut self) -> &mut dyn (::std::any::Any) {
+        self as &mut dyn (::std::any::Any)
+    }
+    fn into_any(self: Box<Self>) -> ::std::boxed::Box<dyn (::std::any::Any)> {
+        self
+    }
+
+    fn descriptor(&self) -> &'static ::protobuf::reflect::MessageDescriptor {
+        Self::descriptor_static()
+    }
+
+    fn new() -> Message {
+        Message::new()
+    }
+
+    fn descriptor_static() -> &'static ::protobuf::reflect::MessageDescriptor {
+        static mut descriptor: ::protobuf::lazy::Lazy<::protobuf::reflect::MessageDescriptor> = ::protobuf::lazy::Lazy {
+            lock: ::protobuf::lazy::ONCE_INIT,
+            ptr: 0 as *const ::protobuf::reflect::MessageDescriptor,
+        };
+        unsafe {
+            descriptor.get(|| {
+                let mut fields = ::std::vec::Vec::new();
+                fields.push(::protobuf::reflect::accessor::make_simple_field_accessor::<_, ::protobuf::types::ProtobufTypeString>(
+                    "addr",
+                    |m: &Message| { &m.addr },
+                    |m: &mut Message| { &mut m.addr },
+                ));
+                fields.push(::protobuf::reflect::accessor::make_singular_bytes_accessor::<_>(
+                    "socket_addr",
+                    Message::has_socket_addr,
+                    Message::get_socket_addr,
+                ));
+                ::protobuf::reflect::MessageDescriptor::new::<Message>(
+                    "Message",
+                    fields,
+                    file_descriptor_proto()
+                )
+            })
+        }
+    }
+
+    fn default_instance() -> &'static Message {
+        static mut instance: ::protobuf::lazy::Lazy<Message> = ::protobuf::lazy::Lazy {
+            lock: ::protobuf::lazy::ONCE_INIT,
+            ptr: 0 as *const Message,
+        };
+        unsafe {
+            instance.get(Message::new)
+        }
+    }
+}
+
+impl ::protobuf::Clear for Message {
+    fn clear(&mut self) {
+        self.addr.clear();
+        self.union = ::std::option::Option::None;
+        self.unknown_fields.clear();
+    }
+}
+
+impl ::std::fmt::Debug for Message {
+    fn fmt(&self, f: &mut ::std::fmt::Formatter<'_>) -> ::std::fmt::Result {
+        ::protobuf::text_format::fmt(self, f)
+    }
+}
+
+impl ::protobuf::reflect::ProtobufValue for Message {
+    fn as_ref(&self) -> ::protobuf::reflect::ProtobufValueRef {
+        ::protobuf::reflect::ProtobufValueRef::Message(self)
+    }
+}
+
+static file_descriptor_proto_data: &'static [u8] = b"\
+    \n\rmessage.proto\x12\x03hbb\"=\n\x07Message\x12\x0e\n\x04addr\x18\x01\
+    \x20\x01(\tB\0\x12\x17\n\x0bsocket_addr\x18\x06\x20\x01(\x0cH\0B\0B\x07\
+    \n\x05union:\0B\0b\x06proto3\
+";
+
+static mut file_descriptor_proto_lazy: ::protobuf::lazy::Lazy<::protobuf::descriptor::FileDescriptorProto> = ::protobuf::lazy::Lazy {
+    lock: ::protobuf::lazy::ONCE_INIT,
+    ptr: 0 as *const ::protobuf::descriptor::FileDescriptorProto,
+};
+
+fn parse_descriptor_proto() -> ::protobuf::descriptor::FileDescriptorProto {
+    ::protobuf::parse_from_bytes(file_descriptor_proto_data).unwrap()
+}
+
+pub fn file_descriptor_proto() -> &'static ::protobuf::descriptor::FileDescriptorProto {
+    unsafe {
+        file_descriptor_proto_lazy.get(|| {
+            parse_descriptor_proto()
+        })
+    }
+}

src/rendezvous_server.rs

@@ -0,0 +1,93 @@
+use super::message_proto::Message;
+use bytes::Bytes;
+use futures::{FutureExt, SinkExt};
+use protobuf::{parse_from_bytes, Message as _};
+use std::{
+    collections::HashMap,
+    error::Error,
+    net::{Ipv4Addr, SocketAddr, SocketAddrV4},
+    time::{SystemTime, UNIX_EPOCH},
+};
+use tokio::net::UdpSocket;
+use tokio::stream::StreamExt;
+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(Vec<u8>);
+
+impl V4AddrMangle {
+    pub fn encode(addr: SocketAddrV4) -> Self {
+        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;
+            }
+        }
+        Self(bytes[..(16 - n_padding)].to_vec())
+    }
+
+    pub fn decode(&self) -> SocketAddrV4 {
+        let mut padded = [0u8; 16];
+        padded[..self.0.len()].copy_from_slice(&self.0);
+        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: SocketAddr,
+}
+
+type PeerMap = HashMap<String, Peer>;
+
+pub struct RendezvousServer {
+    peer_map: PeerMap,
+}
+
+impl RendezvousServer {
+    pub async fn start(addr: &str) -> Result<Self, Box<dyn Error>> {
+        let socket = UdpSocket::bind(addr).await?;
+        let mut socket = UdpFramed::new(socket, BytesCodec::new());
+
+        let rs = Self {
+            peer_map: PeerMap::new(),
+        };
+        while let Some(Ok((bytes, addr))) = socket.next().await {
+            if let SocketAddr::V4(addr_v4) = addr {
+                if let Ok(msg_in) = parse_from_bytes::<Message>(&bytes) {
+                    let msg_out = Message::new();
+                    socket
+                        .send((Bytes::from(msg_out.write_to_bytes().unwrap()), addr))
+                        .await?;
+                }
+            }
+        }
+        Ok(rs)
+    }
+}
+
+#[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::encode(addr).decode());
+        println!("{:?}", V4AddrMangle::encode(addr).0);
+    }
+}