func run(port, password string) {
ln, err := net.Listen("tcp", ":"+port)
if err != nil {
log.Printf("error listening port %v: %v\n", port, err)
os.Exit(1)
}
passwdManager.add(port, password, ln)
var cipher *ss.Cipher
log.Printf("server listening port %v ...\n", port)
for {
conn, err := ln.Accept()
if err != nil {
// listener maybe closed to update password
debug.Printf("accept error: %v\n", err)
return
}
// Creating cipher upon first connection.
if cipher == nil {
log.Println("creating cipher for port:", port)
cipher, err = ss.NewCipher(config.Method, password)
if err != nil {
log.Printf("Error generating cipher for port: %s %v\n", port, err)
conn.Close()
continue
}
}
go handleConnection(ss.NewConn(conn, cipher.Copy()))
}
}
func runUDP(port, password string) {
var cipher *ss.Cipher
port_i, _ := strconv.Atoi(port)
log.Printf("listening udp port %v\n", port)
conn, err := net.ListenUDP("udp", &net.UDPAddr{
IP: net.IPv6zero,
Port: port_i,
})
passwdManager.addUDP(port, password, conn)
if err != nil {
log.Printf("error listening udp port %v: %v\n", port, err)
return
}
defer conn.Close()
cipher, err = ss.NewCipher(config.Method, password)
if err != nil {
log.Printf("Error generating cipher for udp port: %s %v\n", port, err)
conn.Close()
}
UDPConn := ss.NewUDPConn(conn, cipher.Copy())
for {
UDPConn.ReadAndHandleUDPReq()
}
}
func main() {
flag.StringVar(&config.server, "s", "127.0.0.1", "server:port")
flag.IntVar(&config.port, "p", 0, "server:port")
flag.IntVar(&config.core, "core", 1, "number of CPU cores to use")
flag.StringVar(&config.passwd, "k", "", "password")
flag.StringVar(&config.method, "m", "", "encryption method, use empty string or rc4")
flag.IntVar(&config.nconn, "nc", 1, "number of connection to server")
flag.IntVar(&config.nreq, "nr", 1, "number of request for each connection")
// flag.IntVar(&config.nsec, "ns", 0, "run how many seconds for each connection")
flag.BoolVar((*bool)(&debug), "d", false, "print http response body for debugging")
flag.Parse()
if config.server == "" || config.port == 0 || config.passwd == "" || len(flag.Args()) != 1 {
fmt.Printf("Usage: %s -s <server> -p <port> -k <password> <url>\n", os.Args[0])
os.Exit(1)
}
runtime.GOMAXPROCS(config.core)
uri := flag.Arg(0)
if strings.HasPrefix(uri, "https://") {
fmt.Println("https not supported")
os.Exit(1)
}
if !strings.HasPrefix(uri, "http://") {
uri = "http://" + uri
}
cipher, err := ss.NewCipher(config.method, config.passwd)
if err != nil {
fmt.Println("Error creating cipher:", err)
os.Exit(1)
}
serverAddr := net.JoinHostPort(config.server, strconv.Itoa(config.port))
parsedURL, err := url.Parse(uri)
if err != nil {
fmt.Println("Error parsing url:", err)
os.Exit(1)
}
host, _, err := net.SplitHostPort(parsedURL.Host)
if err != nil {
host = net.JoinHostPort(parsedURL.Host, "80")
} else {
host = parsedURL.Host
}
// fmt.Println(host)
rawAddr, err := ss.RawAddr(host)
if err != nil {
panic("Error getting raw address.")
}
done := make(chan []time.Duration)
for i := 1; i <= config.nconn; i++ {
go get(i, uri, serverAddr, rawAddr, cipher, done)
}
// collect request finish time
reqTime := make([]int64, config.nconn*config.nreq)
reqDone := 0
for i := 1; i <= config.nconn; i++ {
rt := <-done
for _, t := range rt {
reqTime[reqDone] = int64(t)
reqDone++
}
}
fmt.Println("number of total requests:", config.nconn*config.nreq)
fmt.Println("number of finished requests:", reqDone)
if reqDone == 0 {
return
}
// calculate average an standard deviation
reqTime = reqTime[:reqDone]
var sum int64
for _, d := range reqTime {
sum += d
}
avg := float64(sum) / float64(reqDone)
varSum := float64(0)
for _, d := range reqTime {
di := math.Abs(float64(d) - avg)
di *= di
varSum += di
}
stddev := math.Sqrt(varSum / float64(reqDone))
fmt.Println("\naverage time per request:", time.Duration(avg))
fmt.Println("standard deviation:", time.Duration(stddev))
}
func parseServerConfig(config *ss.Config) {
hasPort := func(s string) bool {
_, port, err := net.SplitHostPort(s)
if err != nil {
return false
}
return port != ""
}
if len(config.ServerPassword) == 0 {
// only one encryption table
cipher, err := ss.NewCipher(config.Method, config.Password)
if err != nil {
log.Fatal("Failed generating ciphers:", err)
}
srvPort := strconv.Itoa(config.ServerPort)
srvArr := config.GetServerArray()
n := len(srvArr)
servers.srvCipher = make([]*ServerCipher, n)
for i, s := range srvArr {
if hasPort(s) {
log.Println("ignore server_port option for server", s)
servers.srvCipher[i] = &ServerCipher{s, cipher}
} else {
servers.srvCipher[i] = &ServerCipher{net.JoinHostPort(s, srvPort), cipher}
}
}
} else {
// multiple servers
n := len(config.ServerPassword)
servers.srvCipher = make([]*ServerCipher, n)
cipherCache := make(map[string]*ss.Cipher)
i := 0
for _, serverInfo := range config.ServerPassword {
if len(serverInfo) < 2 || len(serverInfo) > 3 {
log.Fatalf("server %v syntax error\n", serverInfo)
}
server := serverInfo[0]
passwd := serverInfo[1]
encmethod := ""
if len(serverInfo) == 3 {
encmethod = serverInfo[2]
}
if !hasPort(server) {
log.Fatalf("no port for server %s\n", server)
}
// Using "|" as delimiter is safe here, since no encryption
// method contains it in the name.
cacheKey := encmethod + "|" + passwd
cipher, ok := cipherCache[cacheKey]
if !ok {
var err error
cipher, err = ss.NewCipher(encmethod, passwd)
if err != nil {
log.Fatal("Failed generating ciphers:", err)
}
cipherCache[cacheKey] = cipher
}
servers.srvCipher[i] = &ServerCipher{server, cipher}
i++
}
}
servers.failCnt = make([]int, len(servers.srvCipher))
for _, se := range servers.srvCipher {
log.Println("available remote server", se.server)
}
return
}