Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

2 feature #1

Open
wants to merge 1 commit into
base: master
Choose a base branch
from
Open

2 feature #1

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
77 changes: 65 additions & 12 deletions main.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -4,9 +4,13 @@ import (
"flag"
"fmt"
"io"
"net"
"net/http"
"net/url"
"crypto/tls"
"os"
"strings"
"log"

"golang.org/x/net/websocket"
)
Expand All @@ -15,14 +19,17 @@ var (
origin string
headers string
version int
resolve_as string
)

func init() {
help = fmt.Sprintf(help, VERSION)
flag.StringVar(&origin, "o", "http://0.0.0.0/", "websocket origin")
flag.StringVar(&headers, "H", "", "a comma separated list of http headers")
flag.IntVar(&version, "v", websocket.ProtocolVersionHybi13, "websocket version")
flag.StringVar(&resolve_as, "r", "", "resolve the host as a specified ip, or ip:port")
flag.Parse()
log.SetFlags(log.LstdFlags|log.Lshortfile)
}

const VERSION = "0.1"
Expand All @@ -46,29 +53,75 @@ func parseHeaders(headers string) http.Header {
}
return h
}

func make_ip_port(u *url.URL) string{
if u==nil {return ""}
port := "80"
if u.Scheme == "wss" {
port = "443"
}
if _,_,err := net.SplitHostPort(u.Host); err!=nil { // not found a port
return net.JoinHostPort(u.Host,port)
}
return u.Host
}
func main() {
fatal := func(format string, a ...interface{}) {
fmt.Fprintf(os.Stderr, format, a...)
os.Exit(2)
}

var (
client net.Conn
ws *websocket.Conn
err error
)

target := flag.Arg(0)
if target == "" {
fatal(help)
log.Fatal(help)
}
config, err := websocket.NewConfig(target, origin)
if err != nil {
fatal("%s\n", err)
log.Fatal("%s\n", err)
}
if headers != "" {
config.Header = parseHeaders(headers)
}
config.Version = version
ws, err := websocket.DialConfig(config)
if err != nil {
fatal("Error dialing %s: %v\n", target, err)
}
errc := make(chan error, 2)

// i dont use the default DialConfig, or Dial, in order to control more and fetch more infomation
switch config.Location.Scheme {
case "ws":
if resolve_as == "" {
client,err = net.Dial("tcp", make_ip_port(config.Location) )
} else {
u,err := url.Parse(fmt.Sprintf("ws://%s",resolve_as))
if err != nil {
log.Fatal(err)
}
client,err = net.Dial("tcp",make_ip_port(u))
}

case "wss":
config.TlsConfig = &tls.Config{ServerName: config.Location.Host} // override by myself
if resolve_as == "" {
client,err = tls.Dial("tcp",make_ip_port(config.Location), config.TlsConfig)
} else {
u,err := url.Parse(fmt.Sprintf("wss://%s",resolve_as))
if err != nil {
log.Fatal(err)
}
client,err = tls.Dial("tcp",make_ip_port(u), config.TlsConfig)
}
default:
log.Fatal("invalid scheme. should be ws:// or wss://\n")
}
if err != nil {
log.Fatal(err)
}
ws, err = websocket.NewClient(config, client)
if err!= nil {
client.Close()
log.Fatal("Error dialing %s: %v\n", target, err)
}
fmt.Printf("Connected to %v\n", client.RemoteAddr() )
errc := make(chan error, 2)
cp := func(dst io.Writer, src io.Reader) {
_, err := io.Copy(dst, src)
errc <- err
Expand Down