forked from ginuerzh/gost
/
util.go
159 lines (140 loc) · 2.97 KB
/
util.go
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package main
import (
"crypto/tls"
"fmt"
"github.com/golang/glog"
"io"
"net"
"net/url"
"strings"
)
type strSlice []string
func (ss *strSlice) String() string {
return fmt.Sprintf("%s", *ss)
}
func (ss *strSlice) Set(value string) error {
*ss = append(*ss, value)
return nil
}
// socks://admin:123456@localhost:8080/tls
type Args struct {
Addr string // host:port
Protocol string // protocol: http&socks5/http/socks/socks5/ss, default is http&socks5
Transport string // transport: tcp/ws/tls, default is tcp(raw tcp)
User *url.Userinfo
EncMeth string // data encryption method
EncPass string // data encryption password
Cert tls.Certificate // tls certificate
}
func (args Args) String() string {
var authUser, authPass string
if args.User != nil {
authUser = args.User.Username()
authPass, _ = args.User.Password()
}
return fmt.Sprintf("host: %s, proto: %s, trans: %s, auth: %s:%s, enc: %s:%s",
args.Addr, args.Protocol, args.Transport, authUser, authPass,
args.EncMeth, args.EncPass)
}
func parseArgs(ss []string) (args []Args) {
for _, s := range ss {
if !strings.Contains(s, "://") {
s = "tcp://" + s
}
u, err := url.Parse(s)
if err != nil {
if glog.V(LWARNING) {
glog.Warningln(err)
}
continue
}
arg := Args{
Addr: u.Host,
User: u.User,
}
schemes := strings.Split(u.Scheme, "+")
if len(schemes) == 1 {
arg.Protocol = schemes[0]
arg.Transport = schemes[0]
}
if len(schemes) == 2 {
arg.Protocol = schemes[0]
arg.Transport = schemes[1]
}
switch arg.Protocol {
case "http", "socks", "socks5", "ss":
default:
arg.Protocol = "default"
}
switch arg.Transport {
case "ws", "tls", "tcp":
default:
arg.Transport = "tcp"
}
mp := strings.Split(strings.Trim(u.Path, "/"), ":")
if len(mp) == 1 {
arg.EncMeth = mp[0]
}
if len(mp) == 2 {
arg.EncMeth = mp[0]
arg.EncPass = mp[1]
}
if arg.Cert, err = tls.LoadX509KeyPair("cert.pem", "key.pem"); err != nil {
if glog.V(LFATAL) {
glog.Fatalln(err)
}
}
args = append(args, arg)
}
return
}
// based on io.Copy
func Copy(dst io.Writer, src io.Reader) (written int64, err error) {
buf := make([]byte, 32*1024)
for {
nr, er := src.Read(buf)
//log.Println("cp r", nr, er)
if nr > 0 {
nw, ew := dst.Write(buf[:nr])
//log.Println("cp w", nw, ew)
if nw > 0 {
written += int64(nw)
}
if ew != nil {
err = ew
break
}
/*
if nr != nw {
err = io.ErrShortWrite
break
}
*/
}
if er == io.EOF {
break
}
if er != nil {
err = er
break
}
}
return
}
func Pipe(src io.Reader, dst io.Writer, c chan<- error) {
_, err := Copy(dst, src)
c <- err
}
func Transport(conn, conn2 net.Conn) (err error) {
rChan := make(chan error, 1)
wChan := make(chan error, 1)
go Pipe(conn, conn2, wChan)
go Pipe(conn2, conn, rChan)
select {
case err = <-wChan:
//log.Println("w exit", err)
case err = <-rChan:
//log.Println("r exit", err)
}
return
}