diff options
Diffstat (limited to 'src/fl2k_tcp.c')
| -rw-r--r-- | src/fl2k_tcp.c | 250 |
1 files changed, 250 insertions, 0 deletions
diff --git a/src/fl2k_tcp.c b/src/fl2k_tcp.c new file mode 100644 index 0000000..ad0aa18 --- /dev/null +++ b/src/fl2k_tcp.c @@ -0,0 +1,250 @@ +/* + * osmo-fl2k, turns FL2000-based USB 3.0 to VGA adapters into + * low cost DACs + * + * Copyright (C) 2016-2018 by Steve Markgraf <steve@steve-m.de> + * + * SPDX-License-Identifier: GPL-2.0+ + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <errno.h> +#include <signal.h> +#include <string.h> +#include <stdio.h> +#include <stdlib.h> + +#ifndef _WIN32 +#include <unistd.h> +#include <arpa/inet.h> +#include <sys/socket.h> +#include <sys/types.h> +#include <sys/socket.h> +#include <sys/time.h> +#include <netinet/in.h> +#include <netinet/tcp.h> /* for TCP_NODELAY */ +#include <fcntl.h> +#else +#include <winsock2.h> +#include "getopt/getopt.h" +#endif + +#include "osmo-fl2k.h" + +#ifdef _WIN32 +#pragma comment(lib, "ws2_32.lib") + +typedef int socklen_t; + +#else +#define closesocket close +#define SOCKADDR struct sockaddr +#define SOCKET int +#define SOCKET_ERROR -1 +#endif + +static SOCKET s; +static fl2k_dev_t *dev = NULL; +static volatile int do_exit = 0; +static volatile int connected = 0; +static char *txbuf = NULL; +static fd_set readfds; +static SOCKET sock; + +void usage(void) +{ + fprintf(stderr, + "fl2k_tcp, a spectrum client for FL2K VGA dongles\n\n" + "Usage:\t[-a server address]\n" + "\t[-d device index (default: 0)]\n" + "\t[-p port (default: 1234)]\n" + "\t[-s samplerate in Hz (default: 100 MS/s)]\n" + "\t[-b number of buffers (default: 4)]\n" + ); + exit(1); +} + +#ifdef _WIN32 +BOOL WINAPI +sighandler(int signum) +{ + if (CTRL_C_EVENT == signum) { + fprintf(stderr, "Signal caught, exiting!\n"); + fl2k_stop_tx(dev); + do_exit = 1; + return TRUE; + } + return FALSE; +} +#else +static void sighandler(int signum) +{ + fprintf(stderr, "Signal caught, exiting!\n"); + do_exit = 1; + fl2k_stop_tx(dev); +} +#endif + +void fl2k_callback(fl2k_data_info_t *data_info) +{ + int left = FL2K_BUF_LEN; + int received; + int r; + struct timeval tv = { 1, 0 }; + + if (!connected) + return; + + data_info->sampletype_signed = 1; + data_info->r_buf = txbuf; + + while (!do_exit && (left > 0)) { + FD_ZERO(&readfds); + FD_SET(sock, &readfds); + tv.tv_sec = 1; + tv.tv_usec = 0; + r = select(sock + 1, &readfds, NULL, NULL, &tv); + + if (r) { + received = recv(sock, txbuf + (FL2K_BUF_LEN - left), left, 0); + left -= received; + } + } +} + +int main(int argc, char **argv) +{ + int r, opt, i; + char *addr = "127.0.0.1"; + int port = 1234; + uint32_t samp_rate = 100000000; + struct sockaddr_in local, remote; + uint32_t buf_num = 0; + int dev_index = 0; + int dev_given = 0; + int flag = 1; + +#ifdef _WIN32 + WSADATA wsd; + i = WSAStartup(MAKEWORD(2,2), &wsd); +#else + struct sigaction sigact, sigign; +#endif + + while ((opt = getopt(argc, argv, "d:s:a:p:b:")) != -1) { + switch (opt) { + case 'd': + dev_index = (uint32_t)atoi(optarg); + dev_given = 1; + break; + case 's': + samp_rate = (uint32_t)atof(optarg); + break; + case 'a': + addr = optarg; + break; + case 'p': + port = atoi(optarg); + break; + case 'b': + buf_num = atoi(optarg); + break; + default: + usage(); + break; + } + } + + if (argc < optind) + usage(); + + if (dev_index < 0) { + exit(1); + } + + txbuf = malloc(FL2K_BUF_LEN); + + if (!txbuf) { + fprintf(stderr, "malloc error!\n"); + exit(1); + } + + fl2k_open(&dev, (uint32_t)dev_index); + if (NULL == dev) { + fprintf(stderr, "Failed to open fl2k device #%d.\n", dev_index); + exit(1); + } + + r = fl2k_start_tx(dev, fl2k_callback, NULL, buf_num); + + /* Set the sample rate */ + r = fl2k_set_sample_rate(dev, samp_rate); + if (r < 0) + fprintf(stderr, "WARNING: Failed to set sample rate.\n"); + +#ifndef _WIN32 + sigact.sa_handler = sighandler; + sigemptyset(&sigact.sa_mask); + sigact.sa_flags = 0; + sigign.sa_handler = SIG_IGN; + sigaction(SIGINT, &sigact, NULL); + sigaction(SIGTERM, &sigact, NULL); + sigaction(SIGQUIT, &sigact, NULL); + sigaction(SIGPIPE, &sigact, NULL); +#else + SetConsoleCtrlHandler( (PHANDLER_ROUTINE) sighandler, TRUE ); +#endif + + sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); + + memset(&remote, 0, sizeof(remote)); + + remote.sin_family = AF_INET; + remote.sin_port = htons(port); + remote.sin_addr.s_addr = inet_addr(addr); + + fprintf(stderr, "Connecting to %s:%d...\n", addr, port); + while (connect(sock, (struct sockaddr *)&remote, sizeof(remote)) != 0) { +#ifndef _WIN32 + usleep(500000); +#else + Sleep(0.5); +#endif + if (do_exit) + goto out; + } + + setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (char *)&flag,sizeof(flag)); + fprintf(stderr, "Connected\n"); + connected = 1; + + while (!do_exit) { +#ifndef _WIN32 + usleep(500000); +#else + Sleep(0.5); +#endif + } + +out: + free(txbuf); + fl2k_close(dev); + closesocket(s); +#ifdef _WIN32 + WSACleanup(); +#endif + + return 0; +} |