/
subcircuit_server.go
154 lines (145 loc) · 3.18 KB
/
subcircuit_server.go
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// subcircuit_server.go
package main
import (
"fmt"
"io"
"kirisurf-legacy/ll/circuitry"
"kirisurf-legacy/ll/dirclient"
"kirisurf-legacy/ll/intercom"
"kirisurf-legacy/ll/kiss"
"net"
"strconv"
"strings"
"github.com/KirisurfProject/kilog"
)
func sc_server_real_handler(_wire io.ReadWriteCloser) (err error) {
wire, err := kiss.TransportHandshake(MasterKey, _wire,
func([]byte) bool { return true })
if err != nil {
kilog.Debug("failed the transport handshake")
return err
}
thing := make([]byte, 1)
_, err = io.ReadFull(wire, thing)
if err != nil {
kilog.Debug("failed the readfull")
return err
}
if thing[0] == 0 {
// Terminate
if !MasterConfig.General.IsExit {
return nil
}
kilog.Debug("opening legacy (stew) circuit")
e2e_server_handler_old(wire)
} else if thing[0] == 255 {
// Terminate with kinda old
if !MasterConfig.General.IsExit {
return nil
}
kilog.Debug("opening kinda old circuit")
e2e_server_kinda_old_handler(wire)
} else if thing[0] == 254 {
// Terminate with new
if !MasterConfig.General.IsExit {
return nil
}
kilog.Debug("opening circuit")
e2e_server_handler(wire)
} else {
xaxa := make([]byte, thing[0])
_, err := io.ReadFull(wire, xaxa)
if err != nil {
return err
}
key := string(xaxa)
qqq := dirclient.PKeyLookup(key)
if qqq == nil {
kilog.Debug("Cannot find %s in %v", xaxa, dirclient.KDirectory)
dirclient.RefreshDirectory()
qqq = dirclient.PKeyLookup(key)
if qqq == nil {
return nil
}
}
kilog.Debug("Continuing to %s", qqq.Address)
remm, err := circuitry.Dialer.Dial(circuitry.Old2New(qqq.Address))
if err != nil {
return err
}
go func() {
io.Copy(wire, remm)
wire.Close()
}()
io.Copy(remm, wire)
remm.Close()
}
return io.EOF
}
func sc_server_handler(_wire net.Conn) (err error) {
defer func() {
if err != nil {
kilog.Debug("sc_server_handler returning err=%s", err.Error())
}
}()
defer _wire.Close()
wire, err := kiss.Obfs3fHandshake(_wire, true)
if err != nil {
//kilog.Debug(err.Error())
return nil
}
return sc_server_real_handler(wire)
}
type SCServer struct {
listener net.Listener
killer chan bool
}
func NewSCServer(addr string) SCServer {
listener, err := net.Listen("tcp", addr)
if err != nil {
panic(err.Error())
}
killer := make(chan bool)
go func() {
for {
select {
case <-killer:
listener.Close()
return
default:
// establish connection
client, err := listener.Accept()
//log.Debug("Of acceptings client: %s", client.RemoteAddr())
if err != nil {
kilog.Critical(err.Error())
client.Close()
continue
}
go func() {
err := sc_server_handler(client)
if err != nil {
//log.Error(err.Error())
}
}()
}
}
}()
return SCServer{listener, killer}
}
func (thing SCServer) Kill() {
thing.killer <- true
}
func RegisterNGSCServer(addr string) string {
port, _ := strconv.Atoi(strings.Split(addr, ":")[1])
naddr := fmt.Sprintf("kirisurf-legacy@%s:%d", strings.Split(addr, ":")[0], port+1)
listener := intercom.MakeIntercomServer(naddr)
go func() {
for {
nooclient := listener.Accept()
go func() {
sc_server_real_handler(nooclient)
}()
}
}()
return naddr
}