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dial.go
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dial.go
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package main
import (
"errors"
"fmt"
"net"
"net/url"
"time"
"golang.org/x/net/proxy"
ss "github.com/shadowsocks/shadowsocks-go/shadowsocks"
)
func NewDialFromURL(u *url.URL) (func(network, addr string) (net.Conn, error), error) {
switch u.Scheme {
case "ss":
return newSSDial(u)
case "socks5":
dialer, err := proxy.FromURL(u, proxy.Direct)
return dialer.Dial, err
default:
return nil, fmt.Errorf("unsupported scheme: %s", u.Scheme)
}
}
func newSSDial(u *url.URL) (func(network, addr string) (net.Conn, error), error) {
password, ok := u.User.Password()
if !ok {
return nil, errors.New("no password")
}
if _, err := ss.NewCipher(u.User.Username(), password); err != nil {
return nil, err
}
return func(network, addr string) (net.Conn, error) {
rawAddr, err := ss.RawAddr(addr)
if err != nil {
return nil, err
}
conn, err := net.DialTimeout("tcp", u.Host, 5*time.Second)
if err != nil {
return nil, err
}
cipher, _ := ss.NewCipher(u.User.Username(), password)
c := ss.NewConn(conn, cipher)
if _, err = c.Write(rawAddr); err != nil {
c.Close()
return nil, err
}
return c, nil
}, nil
}