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proxy.go
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proxy.go
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package ws2ssh
import (
"context"
"net"
"golang.org/x/crypto/ssh"
"github.com/armon/go-socks5"
)
type Socks5Proxy struct {
s *socks5.Server
}
func (s Socks5Proxy) ListenAndServe(addr string) error {
return s.ListenAndServeContext(context.Background(), addr)
}
func (s Socks5Proxy) ListenAndServeContext(ctx context.Context, addr string) error {
l, err := net.Listen("tcp", addr)
if err != nil {
return err
}
go func() {
<-ctx.Done()
_ = l.Close()
}()
return s.s.Serve(l)
}
func NewSocks5Proxy(conn ssh.Conn) (*Socks5Proxy, error) {
conf := &socks5.Config{
Dial: func(ctx context.Context, network, addr string) (net.Conn, error) {
return NewNetConnFromSSHConn(conn, addr)
},
}
s, err := socks5.New(conf)
return &Socks5Proxy{s: s}, err
}
type NameResolver struct {
net string
ip string
port string
}
func (n NameResolver) Resolve(ctx context.Context, name string) (context.Context, net.IP, error) {
resolver := &net.Resolver{
PreferGo: true,
Dial: func(ctx context.Context, network, address string) (net.Conn, error) {
return net.Dial(n.net, n.ip+":"+n.port)
},
}
ips, err := resolver.LookupIP(ctx, "ip", name)
if err != nil {
return ctx, nil, err
}
return ctx, ips[0], err
}
func NewNameResolver(net, ip, port string) socks5.NameResolver {
return &NameResolver{net: net, ip: ip, port: port}
}
func NewSocks5ProxyWithNameResolver(conn ssh.Conn, resolver socks5.NameResolver) (*Socks5Proxy, error) {
conf := &socks5.Config{
Dial: func(ctx context.Context, network, addr string) (net.Conn, error) {
return NewNetConnFromSSHConn(conn, addr)
},
Resolver: resolver,
}
s, err := socks5.New(conf)
return &Socks5Proxy{s: s}, err
}