func CreateSocket(network string, isStream bool) (socket *Socket, err error) {
var n C.int
if network == "ip4" {
n = C.int(syscall.AF_INET)
} else if network == "ip6" {
n = C.int(syscall.AF_INET6)
} else {
return nil, fmt.Errorf("network must be either ip4 or ip6")
}
var trnType C.int
if isStream {
trnType = C.SOCK_STREAM //data streaming
} else {
trnType = C.SOCK_DGRAM //messaging
}
sock := C.udt_socket(n, trnType, 0)
if C.int(sock) == C.int(C.UDT_INVALID_SOCK) {
return nil, udtErrDesc("Invalid socket")
}
socket = &Socket{
sock: sock,
af: n,
}
return
}
func socket(addrfamily int) (sock C.UDTSOCKET, reterr error) {
sock = C.udt_socket(C.int(addrfamily), C.SOCK_STREAM, 0)
if sock == (C.UDTSOCKET)(C.INVALID_SOCK) {
return (C.UDTSOCKET)(C.INVALID_SOCK), fmt.Errorf("invalid socket: %s", lastError())
}
return sock, nil
}