func run(port, password string, config *ss.Config) {
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()), config.GetAcl(port))
}
}
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)
}
cipher, ok := cipherCache[passwd]
if !ok {
var err error
cipher, err = ss.NewCipher(encmethod, passwd)
if err != nil {
log.Fatal("Failed generating ciphers:", err)
}
cipherCache[passwd] = 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
}