C++ (Cpp) lvc_init Examples

Example #1

File: response-client.c Project: buidanhquy/test

/*
void response_client_open_ex(response_client_t *uclient, char *conn_str, char *(*id_f)(), char *(*pph_f)()) {
    uclient->id_f = id_f;
    uclient->passphrase_f = pph_f;
    response_client_open_int(uclient, conn_str);
}
*/
int response_client_send(response_client_t *uclient, response_request_t *request) {
    int ret;
    long nbytes;
    char buff[UCLIENT_BUFSIZE];
#if defined(USERVER_ENCRYPTED)
    char cipher[UCLIENT_BUFSIZE];
    char message[UCLIENT_BUFSIZE];
    uint32_t timestamp;
    char sts[32];
    char *passphrase = uclient->passphrase_f();
    char otp[100];
    char *id = uclient->id_f();
    char challenge[32];
    int len = 32;
    int len1 = 32;
    
    lvc_t lvc;
    
    timestamp = get_ts();
    len1 = ts2str(timestamp, sts);
    
    generate_otp(otp, passphrase, sts);

    do_encrypt(challenge, &len, sts, len1, otp);

    lvc_init(&lvc, message, UCLIENT_BUFSIZE);

    fprintf(stdout, "lvc_pack id:%s\n", id);
    lvc_pack( &lvc, strlen(id), id );
    fprintf(stdout, "lvc_pack ts:%u\n", timestamp);
    lvc_pack( &lvc, sizeof(uint32_t), (char *)&timestamp );
    fprintf(stdout, "lvc_pack challenge:%d\n", len);
    lvc_pack( &lvc, len, challenge );
#endif
    response_build_request(buff, sizeof(buff), request);
    nbytes = strlen(buff);

#if defined(USERVER_ENCRYPTED)
    fprintf(stdout, "Message to send:%.*s\n", nbytes, buff);
    
    len = sizeof(cipher);
    do_encrypt(cipher, &len, buff, nbytes, otp);

    lvc_pack( &lvc, len, cipher );
    lvc_pack_finish(&lvc);
    
    nbytes = lvc.len;

    ret = pj_sock_sendto(uclient->fd, lvc.data, &nbytes, 0, (const pj_sockaddr_t *)uclient->connect_data, sizeof(pj_sockaddr_in));
#else
    ret = pj_sock_sendto(uclient->fd, buff, &nbytes, 0, (const pj_sockaddr_t *)uclient->connect_data, sizeof(pj_sockaddr_in));
#endif

    if(ret != 0) {
        PERROR_IF_TRUE(1, "Error in sending data\n");
        return -1;
    }

    return nbytes;
}

Example #2

File: userver.c Project: mocidis/userver

int $UPROTO$_secure_server_proc(void *param) {
    int ret;
    unsigned int len;
    
    int port;
    char *first, *second, *third;
    char cnt_str[30];

    pj_sockaddr_in caddr;
    char *caddr_str;
    pj_time_val timeout;

    pj_fd_set_t read_fds;

	char buffer[USERVER_BUFSIZE];

	$UPROTO$_request_t request;

    // For lvc parsing
    lvc_t lvc;
    int len1;
    char *val;
    uint32_t *ts;
    char sts[32];
    char plain[USERVER_BUFSIZE];
    char *pph;
    char otp[32];
    pj_str_t pjstr;
    // End for lvc parsing

    $UPROTO$_server_t *userver = ($UPROTO$_server_t *)param;
	ansi_copy_str(cnt_str, userver->connect_str);

    first = cnt_str;
    
    second = strchr(first, ':');
    EXIT_IF_TRUE(second == NULL, "Wrong connection string format\n");
    *second = '\0';
    second++;

    if(0 == strcmp(first, "udp")) {
        third = strchr(second, ':');
        EXIT_IF_TRUE(third == NULL, "Wrong connection string format\n");
        *third = '\0';
        third++;
        port = atoi(third);
        open_udp_socket(userver, second, port);
        if (userver->on_open_socket_f != NULL)
            userver->on_open_socket_f(userver);

        userver->recv_f = &udp_recvfrom;
        userver->send_f = &udp_sendto;
    }
    else if( 0 == strcmp(first, "tty") ) {
        open_tty(userver, second);
        userver->recv_f = &tty_recvfrom;
        userver->send_f = &tty_sendto;
    }
    else {
        EXIT_IF_TRUE(1, "Unsuported protocol\n");
    }

    // thread loop
    timeout.sec = 0;
    timeout.msec = 100;
    userver->is_end = 0;


    while( !userver->is_end ) {

        while (!userver->is_online) {
            SHOW_LOG(3, "Server is currently offline...\n");
            pj_thread_sleep(1000);
        }

        PJ_FD_ZERO(&read_fds);
        PJ_FD_SET(userver->fd, &read_fds);

        pj_mutex_lock(userver->mutex);
        ret = pj_sock_select(userver->fd + 1, &read_fds, NULL, NULL, &timeout); 
        pj_mutex_unlock(userver->mutex);

        EXIT_IF_TRUE(ret < 0, "Error on server socket\n");

        if( PJ_FD_ISSET(userver->fd, &read_fds) ) {
            len = sizeof(caddr);
            pj_bzero(&caddr, len);

            pj_mutex_lock(userver->mutex);
            ret = userver->recv_f(userver->fd, buffer, USERVER_BUFSIZE, (void *)&caddr, &len);
            pj_mutex_unlock(userver->mutex);
            caddr_str = pj_inet_ntoa(caddr.sin_addr);

            if( ret > 0 ) {
                buffer[ret] = '\0';

                lvc_init(&lvc, buffer, ret);

                lvc_unpack(&lvc, &len, &val);
                pj_strset(&pjstr, val, len);
                pph = userver->get_pph_f(&pjstr);
                if( pph != NULL ) {

                    lvc_unpack(&lvc, &len, &val);
                    ts = (uint32_t *)val;
                    ts2str(*ts, sts);

                    lvc_unpack(&lvc, &len, &val);
                    
                    generate_otp(otp, pph, sts);
                    do_decrypt(val, len, plain, &len1, otp);
                    if( pj_ansi_strncmp(sts, plain, len1) == 0 ) {
                        lvc_unpack(&lvc, &len, &val);
                        do_decrypt(val, len, plain, &len1, otp);
                        plain[len1] = '\0';

                        $UPROTO$_parse_request(plain, len1, &request);
                        userver->on_request_f(userver, &request, caddr_str);
                    }
                }
                //else {
                //}
            }
        }
        pj_thread_sleep(100);
    }
	return 0;
}