int main(int argc, char *argv[]) { unsigned char data[PACKET_MAX_LEN]; int data_len = 0; int socket_fd = -1; //char test_flag = 0; struct sockaddr_in dout; unsigned short i = 0; char enc_buf[70] = { 0x00,0x00,0x2B,0x72,0x31,0x53,0xA6,0x78,0x1B,0xEB,0