yggdrasil-network/yggstack
1
0
Fork 0
mirror of https://github.com/yggdrasil-network/yggstack.git synced 2025-04-27 21:55:07 +03:00
Code Issues Projects Releases Packages Wiki Activity Actions

Refactor UDP port forwarding and document usage

Browse source
This commit is contained in:
Vasyl Gello 2024-07-19 07:08:28 +03:00
parent 0783b429fd
commit f529064aa0
4 changed files with 52 additions and 43 deletions
Download patch file Download diff file Expand all files Collapse all files

33
README.md
View file

@ -72,7 +72,8 @@ other configuration such as listen addresses or multicast addresses, etc.
### Run Yggstack
To run SOCKS proxy server listening on local port 1080 using generated configuration:
To run SOCKS proxy server listening on local port 1080 using generated
configuration (like `ssh -D`):
```
./yggstack -useconffile /path/to/yggdrasil.conf -socks 127.0.0.1:1080
@ -84,11 +85,35 @@ To run SOCKS proxy server listening on UNIX socket file `/tmp/yggstack.sock`:
./yggstack -useconffile /path/to/yggdrasil.conf -socks /tmp/yggstack.sock
```
To expose network services (like a Web server) listening on local port 8080 to Yggdrasil
network address at port 80:
To expose network services (like a Web server) listening on local port 8080
to Yggdrasil network address at port 80 (like `ssh -R`):
TCP:
```
./yggstack -useconffile /path/to/yggdrasil.conf -exposetcp 80:127.0.0.1:8080
./yggstack -useconffile /path/to/yggdrasil.conf -remote-tcp 80:127.0.0.1:8080
```
UDP:
```
./yggstack -useconffile /path/to/yggdrasil.conf -remote-udp 53:127.0.0.1:53
```
To forward remote port on some other Yggdrasil node to local machine (like `ssh -L`):
TCP:
```
./yggstack -useconffile /path/to/yggdrasil.conf -local-tcp 127.0.0.1:8080:<remote-yggdrasil-ipv6>:8080
./yggstack -useconffile /path/to/yggdrasil.conf -local-tcp [::1]:8080:<remote-yggdrasil-ipv6>:8080
```
UDP:
```
./yggstack -useconffile /path/to/yggdrasil.conf -local-udp 127.0.0.1:5353:<remote-yggdrasil-ipv6>:53
./yggstack -useconffile /path/to/yggdrasil.conf -local-udp [::1]:5353:<remote-yggdrasil-ipv6>:53
```
To run as a standalone node without SOCKS server or TCP port forwarding:

37
cmd/yggstack/main.go
View file

@ -31,6 +31,8 @@ import (
"github.com/yggdrasil-network/yggstack/src/netstack"
"github.com/yggdrasil-network/yggstack/src/types"
"gvisor.dev/gvisor/pkg/tcpip/adapters/gonet"
)
type node struct {
@ -40,13 +42,8 @@ type node struct {
socks5Listener net.Listener
}
type UDPConnSession struct {
conn *net.UDPConn
remoteAddr net.Addr
}
type UDPPacketConnSession struct {
conn *net.PacketConn
type UDPSession struct {
conn interface{}
remoteAddr net.Addr
}
@ -396,22 +393,23 @@ func main() {
logger.Errorf("Failed to connect to %s: %s", mapping.Mapped, err)
continue
}
udpSession := &UDPPacketConnSession{
conn: &udpFwdConn,
udpSession := &UDPSession{
conn: udpFwdConn,
remoteAddr: remoteUdpAddr,
}
localUdpConnections.Store(remoteUdpAddrStr, udpSession)
go types.ReverseProxyUDPPacketConn(mtu, udpListenConn, remoteUdpAddr, udpFwdConn)
go types.ReverseProxyUDP(mtu, udpListenConn, remoteUdpAddr, udpFwdConn)
}
udpSession, ok := connVal.(*UDPPacketConnSession)
udpSession, ok := connVal.(*UDPSession)
if !ok {
continue
}
udpFwdConn := *udpSession.conn
udpFwdConnPtr := udpSession.conn.(*gonet.UDPConn)
udpFwdConn := *udpFwdConnPtr
_, err = udpFwdConn.WriteTo(udpBuffer[:bytesRead], mapping.Mapped)
_, err = udpFwdConn.Write(udpBuffer[:bytesRead])
if err != nil {
logger.Debugf("Cannot write from yggdrasil to udp listener: %q", err)
udpFwdConn.Close()
@ -482,23 +480,26 @@ func main() {
logger.Errorf("Failed to connect to %s: %s", mapping.Mapped, err)
continue
}
udpSession := &UDPConnSession{
udpSession := &UDPSession{
conn: udpFwdConn,
remoteAddr: remoteUdpAddr,
}
remoteUdpConnections.Store(remoteUdpAddrStr, udpSession)
go types.ReverseProxyUDPConn(mtu, udpListenConn, remoteUdpAddr, *udpFwdConn)
go types.ReverseProxyUDP(mtu, udpListenConn, remoteUdpAddr, udpFwdConn)
}
udpSession, ok := connVal.(*UDPConnSession)
udpSession, ok := connVal.(*UDPSession)
if !ok {
continue
}
_, err = udpSession.conn.Write(udpBuffer[:bytesRead])
udpFwdConnPtr := udpSession.conn.(*net.UDPConn)
udpFwdConn := *udpFwdConnPtr
_, err = udpFwdConn.Write(udpBuffer[:bytesRead])
if err != nil {
logger.Debugf("Cannot write from yggdrasil to udp listener: %q", err)
udpSession.conn.Close()
udpFwdConn.Close()
remoteUdpConnections.Delete(remoteUdpAddrStr)
continue
}

6
src/netstack/netstack.go
View file

@ -86,12 +86,12 @@ func (s *YggdrasilNetstack) DialContext(ctx context.Context, network, address st
}
}
func (s *YggdrasilNetstack) DialTCP(addr *net.TCPAddr) (net.Conn, error) {
func (s *YggdrasilNetstack) DialTCP(addr *net.TCPAddr) (*gonet.TCPConn, error) {
fa, pn, _ := convertToFullAddr(addr.IP, addr.Port)
return gonet.DialTCP(s.stack, fa, pn)
}
func (s *YggdrasilNetstack) DialUDP(addr *net.UDPAddr) (net.PacketConn, error) {
func (s *YggdrasilNetstack) DialUDP(addr *net.UDPAddr) (*gonet.UDPConn, error) {
fa, pn, _ := convertToFullAddr(addr.IP, addr.Port)
return gonet.DialUDP(s.stack, nil, &fa, pn)
}
@ -101,7 +101,7 @@ func (s *YggdrasilNetstack) ListenTCP(addr *net.TCPAddr) (net.Listener, error) {
return gonet.ListenTCP(s.stack, fa, pn)
}
func (s *YggdrasilNetstack) ListenUDP(addr *net.UDPAddr) (net.PacketConn, error) {
func (s *YggdrasilNetstack) ListenUDP(addr *net.UDPAddr) (*gonet.UDPConn, error) {
fa, pn, _ := convertToFullAddr(addr.IP, addr.Port)
return gonet.DialUDP(s.stack, &fa, nil, pn)
}

19
src/types/udpproxy.go
View file

@ -4,7 +4,7 @@ import (
"net"
)
func ReverseProxyUDPConn(mtu uint64, dst net.PacketConn, dstAddr net.Addr, src net.UDPConn) error {
func ReverseProxyUDP(mtu uint64, dst net.PacketConn, dstAddr net.Addr, src net.Conn) error {
buf := make([]byte, mtu)
for {
n, err := src.Read(buf[:])
@ -20,20 +20,3 @@ func ReverseProxyUDPConn(mtu uint64, dst net.PacketConn, dstAddr net.Addr, src n
}
return nil
}
func ReverseProxyUDPPacketConn(mtu uint64, dst net.PacketConn, dstAddr net.Addr, src net.PacketConn) error {
buf := make([]byte, mtu)
for {
n, _, err := src.ReadFrom(buf[:])
if err != nil {
return err
}
if n > 0 {
n, err = dst.WriteTo(buf[:n], dstAddr)
if err != nil {
return err
}
}
}
return nil
}