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mixed.go
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mixed.go
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package mixed
import (
"bytes"
"net"
"net/url"
"github.com/dongxinb/glider/common/conn"
"github.com/dongxinb/glider/common/log"
"github.com/dongxinb/glider/proxy"
"github.com/dongxinb/glider/proxy/http"
"github.com/dongxinb/glider/proxy/socks5"
)
// Mixed struct.
type Mixed struct {
proxy proxy.Proxy
addr string
httpServer *http.HTTP
socks5Server *socks5.Socks5
}
func init() {
proxy.RegisterServer("mixed", NewMixedServer)
}
// NewMixed returns a mixed proxy.
func NewMixed(s string, p proxy.Proxy) (*Mixed, error) {
u, err := url.Parse(s)
if err != nil {
log.F("parse err: %s", err)
return nil, err
}
m := &Mixed{
proxy: p,
addr: u.Host,
}
m.httpServer, err = http.NewHTTP(s, nil, p)
if err != nil {
return nil, err
}
m.socks5Server, err = socks5.NewSocks5(s, nil, p)
if err != nil {
return nil, err
}
return m, nil
}
// NewMixedServer returns a mixed server.
func NewMixedServer(s string, p proxy.Proxy) (proxy.Server, error) {
return NewMixed(s, p)
}
// ListenAndServe listens on server's addr and serves connections.
func (m *Mixed) ListenAndServe() {
go m.socks5Server.ListenAndServeUDP()
l, err := net.Listen("tcp", m.addr)
if err != nil {
log.F("[mixed] failed to listen on %s: %v", m.addr, err)
return
}
log.F("[mixed] listening TCP on %s", m.addr)
for {
c, err := l.Accept()
if err != nil {
log.F("[mixed] failed to accept: %v", err)
continue
}
go m.Serve(c)
}
}
// Serve serves connections.
func (m *Mixed) Serve(c net.Conn) {
defer c.Close()
if c, ok := c.(*net.TCPConn); ok {
c.SetKeepAlive(true)
}
cc := conn.NewConn(c)
head, err := cc.Peek(1)
if err != nil {
// log.F("[mixed] socks5 peek error: %s", err)
return
}
// check socks5, client send socksversion: 5 as the first byte
if head[0] == socks5.Version {
m.socks5Server.Serve(cc)
return
}
head, err = cc.Peek(8)
if err != nil {
log.F("[mixed] http peek error: %s", err)
return
}
for _, method := range http.Methods {
if bytes.HasPrefix(head, method) {
m.httpServer.Serve(cc)
return
}
}
log.F("[mixed] unknown request from %s, ignored", c.RemoteAddr())
}