Initial

1 files changed, 660 insertions, 0 deletions

diff --git a/src/rtl_tcp.c b/src/rtl_tcp.c
new file mode 100644
index 0000000..84f5591
--- /dev/null
+++ b/src/rtl_tcp.c
@@ -0,0 +1,660 @@
+/*
+ * rtl-sdr, turns your Realtek RTL2832 based DVB dongle into a SDR receiver
+ * Copyright (C) 2012 by Steve Markgraf <steve@steve-m.de>
+ * Copyright (C) 2012-2013 by Hoernchen <la@tfc-server.de>
+ *
+ * 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 <netdb.h>
+#include <netinet/in.h>
+#include <fcntl.h>
+#else
+#include <winsock2.h>
+#include <ws2tcpip.h>
+#include "getopt/getopt.h"
+#endif
+
+#include <pthread.h>
+
+#include "rtl-sdr.h"
+#include "convenience/convenience.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
+
+#define DEFAULT_PORT_STR "1234"
+#define DEFAULT_SAMPLE_RATE_HZ 2048000
+#define DEFAULT_MAX_NUM_BUFFERS 500
+
+static SOCKET s;
+
+static pthread_t tcp_worker_thread;
+static pthread_t command_thread;
+static pthread_cond_t exit_cond;
+static pthread_mutex_t exit_cond_lock;
+
+static pthread_mutex_t ll_mutex;
+static pthread_cond_t cond;
+
+struct llist {
+	char *data;
+	size_t len;
+	struct llist *next;
+};
+
+typedef struct { /* structure size must be multiple of 2 bytes */
+	char magic[4];
+	uint32_t tuner_type;
+	uint32_t tuner_gain_count;
+} dongle_info_t;
+
+static rtlsdr_dev_t *dev = NULL;
+
+static int enable_biastee = 0;
+static int global_numq = 0;
+static struct llist *ll_buffers = 0;
+static int llbuf_num = DEFAULT_MAX_NUM_BUFFERS;
+
+static volatile int do_exit = 0;
+
+
+void usage(void)
+{
+	printf("rtl_tcp, an I/Q spectrum server for RTL2832 based DVB-T receivers\n\n");
+	printf("Usage:\t[-a listen address]\n");
+	printf("\t[-p listen port (default: %s)]\n", DEFAULT_PORT_STR);
+	printf("\t[-f frequency to tune to [Hz]]\n");
+	printf("\t[-g gain (default: 0 for auto)]\n");
+	printf("\t[-s samplerate in Hz (default: %d Hz)]\n", DEFAULT_SAMPLE_RATE_HZ);
+	printf("\t[-b number of buffers (default: 15, set by library)]\n");
+	printf("\t[-n max number of linked list buffers to keep (default: %d)]\n", DEFAULT_MAX_NUM_BUFFERS);
+	printf("\t[-d device index (default: 0)]\n");
+	printf("\t[-P ppm_error (default: 0)]\n");
+	printf("\t[-T enable bias-T on GPIO PIN 0 (works for rtl-sdr.com v3 dongles)]\n");
+	exit(1);
+}
+
+#ifdef _WIN32
+int gettimeofday(struct timeval *tv, void* ignored)
+{
+	FILETIME ft;
+	unsigned __int64 tmp = 0;
+	if (NULL != tv) {
+		GetSystemTimeAsFileTime(&ft);
+		tmp |= ft.dwHighDateTime;
+		tmp <<= 32;
+		tmp |= ft.dwLowDateTime;
+		tmp /= 10;
+#ifdef _MSC_VER
+		tmp -= 11644473600000000Ui64;
+#else
+		tmp -= 11644473600000000ULL;
+#endif
+		tv->tv_sec = (long)(tmp / 1000000UL);
+		tv->tv_usec = (long)(tmp % 1000000UL);
+	}
+	return 0;
+}
+
+BOOL WINAPI
+sighandler(int signum)
+{
+	if (CTRL_C_EVENT == signum) {
+		fprintf(stderr, "Signal caught, exiting!\n");
+		do_exit = 1;
+		rtlsdr_cancel_async(dev);
+		return TRUE;
+	}
+	return FALSE;
+}
+#else
+static void sighandler(int signum)
+{
+	fprintf(stderr, "Signal caught, exiting!\n");
+	rtlsdr_cancel_async(dev);
+	do_exit = 1;
+}
+#endif
+
+void rtlsdr_callback(unsigned char *buf, uint32_t len, void *ctx)
+{
+	if(!do_exit) {
+		struct llist *rpt = (struct llist*)malloc(sizeof(struct llist));
+		rpt->data = (char*)malloc(len);
+		memcpy(rpt->data, buf, len);
+		rpt->len = len;
+		rpt->next = NULL;
+
+		pthread_mutex_lock(&ll_mutex);
+
+		if (ll_buffers == NULL) {
+			ll_buffers = rpt;
+		} else {
+			struct llist *cur = ll_buffers;
+			int num_queued = 0;
+
+			while (cur->next != NULL) {
+				cur = cur->next;
+				num_queued++;
+			}
+
+			if(llbuf_num && llbuf_num == num_queued-2){
+				struct llist *curelem;
+
+				free(ll_buffers->data);
+				curelem = ll_buffers->next;
+				free(ll_buffers);
+				ll_buffers = curelem;
+			}
+
+			cur->next = rpt;
+
+			if (num_queued > global_numq)
+				printf("ll+, now %d\n", num_queued);
+			else if (num_queued < global_numq)
+				printf("ll-, now %d\n", num_queued);
+
+			global_numq = num_queued;
+		}
+		pthread_cond_signal(&cond);
+		pthread_mutex_unlock(&ll_mutex);
+	}
+}
+
+static void *tcp_worker(void *arg)
+{
+	struct llist *curelem,*prev;
+	int bytesleft,bytessent, index;
+	struct timeval tv= {1,0};
+	struct timespec ts;
+	struct timeval tp;
+	fd_set writefds;
+	int r = 0;
+
+	while(1) {
+		if(do_exit)
+			pthread_exit(0);
+
+		pthread_mutex_lock(&ll_mutex);
+		gettimeofday(&tp, NULL);
+		ts.tv_sec  = tp.tv_sec+5;
+		ts.tv_nsec = tp.tv_usec * 1000;
+		r = pthread_cond_timedwait(&cond, &ll_mutex, &ts);
+		if(r == ETIMEDOUT) {
+			pthread_mutex_unlock(&ll_mutex);
+			printf("worker cond timeout\n");
+			sighandler(0);
+			pthread_exit(NULL);
+		}
+
+		curelem = ll_buffers;
+		ll_buffers = 0;
+		pthread_mutex_unlock(&ll_mutex);
+
+		while(curelem != 0) {
+			bytesleft = curelem->len;
+			index = 0;
+			bytessent = 0;
+			while(bytesleft > 0) {
+				FD_ZERO(&writefds);
+				FD_SET(s, &writefds);
+				tv.tv_sec = 1;
+				tv.tv_usec = 0;
+				r = select(s+1, NULL, &writefds, NULL, &tv);
+				if(r) {
+					bytessent = send(s,  &curelem->data[index], bytesleft, 0);
+					bytesleft -= bytessent;
+					index += bytessent;
+				}
+				if(bytessent == SOCKET_ERROR || do_exit) {
+						printf("worker socket bye\n");
+						sighandler(0);
+						pthread_exit(NULL);
+				}
+			}
+			prev = curelem;
+			curelem = curelem->next;
+			free(prev->data);
+			free(prev);
+		}
+	}
+}
+
+static int set_gain_by_index(rtlsdr_dev_t *_dev, unsigned int index)
+{
+	int res = 0;
+	int* gains;
+	int count = rtlsdr_get_tuner_gains(_dev, NULL);
+
+	if (count > 0 && (unsigned int)count > index) {
+		gains = malloc(sizeof(int) * count);
+		count = rtlsdr_get_tuner_gains(_dev, gains);
+
+		res = rtlsdr_set_tuner_gain(_dev, gains[index]);
+
+		free(gains);
+	}
+
+	return res;
+}
+
+#ifdef _WIN32
+#define __attribute__(x)
+#pragma pack(push, 1)
+#endif
+struct command{
+	unsigned char cmd;
+	unsigned int param;
+}__attribute__((packed));
+#ifdef _WIN32
+#pragma pack(pop)
+#endif
+static void *command_worker(void *arg)
+{
+	int left, received = 0;
+	fd_set readfds;
+	struct command cmd={0, 0};
+	struct timeval tv= {1, 0};
+	int r = 0;
+	uint32_t tmp;
+
+	while(1) {
+		left=sizeof(cmd);
+		while(left >0) {
+			FD_ZERO(&readfds);
+			FD_SET(s, &readfds);
+			tv.tv_sec = 1;
+			tv.tv_usec = 0;
+			r = select(s+1, &readfds, NULL, NULL, &tv);
+			if(r) {
+				received = recv(s, (char*)&cmd+(sizeof(cmd)-left), left, 0);
+				left -= received;
+			}
+			if(received == SOCKET_ERROR || do_exit) {
+				printf("comm recv bye\n");
+				sighandler(0);
+				pthread_exit(NULL);
+			}
+		}
+		switch(cmd.cmd) {
+		case 0x01:
+			printf("set freq %d\n", ntohl(cmd.param));
+			rtlsdr_set_center_freq(dev,ntohl(cmd.param));
+			break;
+		case 0x02:
+			printf("set sample rate %d\n", ntohl(cmd.param));
+			rtlsdr_set_sample_rate(dev, ntohl(cmd.param));
+			break;
+		case 0x03:
+			printf("set gain mode %d\n", ntohl(cmd.param));
+			rtlsdr_set_tuner_gain_mode(dev, ntohl(cmd.param));
+			break;
+		case 0x04:
+			printf("set gain %d\n", ntohl(cmd.param));
+			rtlsdr_set_tuner_gain(dev, ntohl(cmd.param));
+			break;
+		case 0x05:
+			printf("set freq correction %d\n", ntohl(cmd.param));
+			rtlsdr_set_freq_correction(dev, ntohl(cmd.param));
+			break;
+		case 0x06:
+			tmp = ntohl(cmd.param);
+			printf("set if stage %d gain %d\n", tmp >> 16, (short)(tmp & 0xffff));
+			rtlsdr_set_tuner_if_gain(dev, tmp >> 16, (short)(tmp & 0xffff));
+			break;
+		case 0x07:
+			printf("set test mode %d\n", ntohl(cmd.param));
+			rtlsdr_set_testmode(dev, ntohl(cmd.param));
+			break;
+		case 0x08:
+			printf("set agc mode %d\n", ntohl(cmd.param));
+			rtlsdr_set_agc_mode(dev, ntohl(cmd.param));
+			break;
+		case 0x09:
+			printf("set direct sampling %d\n", ntohl(cmd.param));
+			rtlsdr_set_direct_sampling(dev, ntohl(cmd.param));
+			break;
+		case 0x0a:
+			printf("set offset tuning %d\n", ntohl(cmd.param));
+			rtlsdr_set_offset_tuning(dev, ntohl(cmd.param));
+			break;
+		case 0x0b:
+			printf("set rtl xtal %d\n", ntohl(cmd.param));
+			rtlsdr_set_xtal_freq(dev, ntohl(cmd.param), 0);
+			break;
+		case 0x0c:
+			printf("set tuner xtal %d\n", ntohl(cmd.param));
+			rtlsdr_set_xtal_freq(dev, 0, ntohl(cmd.param));
+			break;
+		case 0x0d:
+			printf("set tuner gain by index %d\n", ntohl(cmd.param));
+			set_gain_by_index(dev, ntohl(cmd.param));
+			break;
+		case 0x0e:
+			printf("set bias tee %d\n", ntohl(cmd.param));
+			rtlsdr_set_bias_tee(dev, (int)ntohl(cmd.param));
+			break;
+		default:
+			break;
+		}
+		cmd.cmd = 0xff;
+	}
+}
+
+int main(int argc, char **argv)
+{
+	int r, opt, i;
+	char *addr = "127.0.0.1";
+	const char *port = DEFAULT_PORT_STR;
+	uint32_t frequency = 100000000, samp_rate = DEFAULT_SAMPLE_RATE_HZ;
+	struct sockaddr_storage local, remote;
+	struct addrinfo *ai;
+	struct addrinfo *aiHead;
+	struct addrinfo  hints;
+	char hostinfo[NI_MAXHOST];
+	char portinfo[NI_MAXSERV];
+	char remhostinfo[NI_MAXHOST];
+	char remportinfo[NI_MAXSERV];
+	int aiErr;
+	uint32_t buf_num = 0;
+	int dev_index = 0;
+	int dev_given = 0;
+	int gain = 0;
+	int ppm_error = 0;
+	struct llist *curelem,*prev;
+	pthread_attr_t attr;
+	void *status;
+	struct timeval tv = {1,0};
+	struct linger ling = {1,0};
+	SOCKET listensocket = 0;
+	socklen_t rlen;
+	fd_set readfds;
+	u_long blockmode = 1;
+	dongle_info_t dongle_info;
+#ifdef _WIN32
+	WSADATA wsd;
+	i = WSAStartup(MAKEWORD(2,2), &wsd);
+#else
+	struct sigaction sigact, sigign;
+#endif
+
+	while ((opt = getopt(argc, argv, "a:p:f:g:s:b:n:d:P:T")) != -1) {
+		switch (opt) {
+		case 'd':
+			dev_index = verbose_device_search(optarg);
+			dev_given = 1;
+			break;
+		case 'f':
+			frequency = (uint32_t)atofs(optarg);
+			break;
+		case 'g':
+			gain = (int)(atof(optarg) * 10); /* tenths of a dB */
+			break;
+		case 's':
+			samp_rate = (uint32_t)atofs(optarg);
+			break;
+		case 'a':
+		        addr = strdup(optarg);
+			break;
+		case 'p':
+		        port = strdup(optarg);
+			break;
+		case 'b':
+			buf_num = atoi(optarg);
+			break;
+		case 'n':
+			llbuf_num = atoi(optarg);
+			break;
+		case 'P':
+			ppm_error = atoi(optarg);
+			break;
+		case 'T':
+			enable_biastee = 1;
+			break;
+		default:
+			usage();
+			break;
+		}
+	}
+
+	if (argc < optind)
+		usage();
+
+	if (!dev_given) {
+		dev_index = verbose_device_search("0");
+	}
+
+	if (dev_index < 0) {
+	    exit(1);
+	}
+
+	rtlsdr_open(&dev, (uint32_t)dev_index);
+	if (NULL == dev) {
+	fprintf(stderr, "Failed to open rtlsdr device #%d.\n", dev_index);
+		exit(1);
+	}
+
+#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, &sigign, NULL);
+#else
+	SetConsoleCtrlHandler( (PHANDLER_ROUTINE) sighandler, TRUE );
+#endif
+
+	/* Set the tuner error */
+	verbose_ppm_set(dev, ppm_error);
+
+	/* Set the sample rate */
+	r = rtlsdr_set_sample_rate(dev, samp_rate);
+	if (r < 0)
+		fprintf(stderr, "WARNING: Failed to set sample rate.\n");
+
+	/* Set the frequency */
+	r = rtlsdr_set_center_freq(dev, frequency);
+	if (r < 0)
+		fprintf(stderr, "WARNING: Failed to set center freq.\n");
+	else
+		fprintf(stderr, "Tuned to %i Hz.\n", frequency);
+
+	if (0 == gain) {
+		 /* Enable automatic gain */
+		r = rtlsdr_set_tuner_gain_mode(dev, 0);
+		if (r < 0)
+			fprintf(stderr, "WARNING: Failed to enable automatic gain.\n");
+	} else {
+		/* Enable manual gain */
+		r = rtlsdr_set_tuner_gain_mode(dev, 1);
+		if (r < 0)
+			fprintf(stderr, "WARNING: Failed to enable manual gain.\n");
+
+		/* Set the tuner gain */
+		r = rtlsdr_set_tuner_gain(dev, gain);
+		if (r < 0)
+			fprintf(stderr, "WARNING: Failed to set tuner gain.\n");
+		else
+			fprintf(stderr, "Tuner gain set to %f dB.\n", gain/10.0);
+	}
+
+	rtlsdr_set_bias_tee(dev, enable_biastee);
+	if (enable_biastee)
+		fprintf(stderr, "activated bias-T on GPIO PIN 0\n");
+
+	/* Reset endpoint before we start reading from it (mandatory) */
+	r = rtlsdr_reset_buffer(dev);
+	if (r < 0)
+		fprintf(stderr, "WARNING: Failed to reset buffers.\n");
+
+	pthread_mutex_init(&exit_cond_lock, NULL);
+	pthread_mutex_init(&ll_mutex, NULL);
+	pthread_mutex_init(&exit_cond_lock, NULL);
+	pthread_cond_init(&cond, NULL);
+	pthread_cond_init(&exit_cond, NULL);
+
+	hints.ai_flags  = AI_PASSIVE; /* Server mode. */
+	hints.ai_family = PF_UNSPEC;  /* IPv4 or IPv6. */
+	hints.ai_socktype = SOCK_STREAM;
+	hints.ai_protocol = IPPROTO_TCP;
+
+	if ((aiErr = getaddrinfo(addr,
+				 port,
+				 &hints,
+				 &aiHead )) != 0)
+	{
+		fprintf(stderr, "local address %s ERROR - %s.\n",
+		        addr, gai_strerror(aiErr));
+		return(-1);
+	}
+	memcpy(&local, aiHead->ai_addr, aiHead->ai_addrlen);
+
+	for (ai = aiHead; ai != NULL; ai = ai->ai_next) {
+		aiErr = getnameinfo((struct sockaddr *)ai->ai_addr, ai->ai_addrlen,
+				    hostinfo, NI_MAXHOST,
+				    portinfo, NI_MAXSERV, NI_NUMERICSERV | NI_NUMERICHOST);
+		if (aiErr)
+			fprintf( stderr, "getnameinfo ERROR - %s.\n",hostinfo);
+
+		listensocket = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
+		if (listensocket < 0)
+			continue;
+
+		r = 1;
+		setsockopt(listensocket, SOL_SOCKET, SO_REUSEADDR, (char *)&r, sizeof(int));
+		setsockopt(listensocket, SOL_SOCKET, SO_LINGER, (char *)&ling, sizeof(ling));
+
+		if (bind(listensocket, (struct sockaddr *)&local, sizeof(local)))
+			fprintf(stderr, "rtl_tcp bind error: %s", strerror(errno));
+		else
+			break;
+	}
+
+#ifdef _WIN32
+	ioctlsocket(listensocket, FIONBIO, &blockmode);
+#else
+	r = fcntl(listensocket, F_GETFL, 0);
+	r = fcntl(listensocket, F_SETFL, r | O_NONBLOCK);
+#endif
+
+	while(1) {
+		printf("listening...\n");
+		printf("Use the device argument 'rtl_tcp=%s:%s' in OsmoSDR "
+		       "(gr-osmosdr) source\n"
+		       "to receive samples in GRC and control "
+		       "rtl_tcp parameters (frequency, gain, ...).\n",
+		       hostinfo, portinfo);
+		listen(listensocket,1);
+
+		while(1) {
+			FD_ZERO(&readfds);
+			FD_SET(listensocket, &readfds);
+			tv.tv_sec = 1;
+			tv.tv_usec = 0;
+			r = select(listensocket+1, &readfds, NULL, NULL, &tv);
+			if(do_exit) {
+				goto out;
+			} else if(r) {
+				rlen = sizeof(remote);
+				s = accept(listensocket,(struct sockaddr *)&remote, &rlen);
+				break;
+			}
+		}
+
+		setsockopt(s, SOL_SOCKET, SO_LINGER, (char *)&ling, sizeof(ling));
+
+		getnameinfo((struct sockaddr *)&remote, rlen,
+			    remhostinfo, NI_MAXHOST,
+			    remportinfo, NI_MAXSERV, NI_NUMERICSERV);
+		printf("client accepted! %s %s\n", remhostinfo, remportinfo);
+
+		memset(&dongle_info, 0, sizeof(dongle_info));
+		memcpy(&dongle_info.magic, "RTL0", 4);
+
+		r = rtlsdr_get_tuner_type(dev);
+		if (r >= 0)
+			dongle_info.tuner_type = htonl(r);
+
+		r = rtlsdr_get_tuner_gains(dev, NULL);
+		if (r >= 0)
+			dongle_info.tuner_gain_count = htonl(r);
+
+		r = send(s, (const char *)&dongle_info, sizeof(dongle_info), 0);
+		if (sizeof(dongle_info) != r)
+			printf("failed to send dongle information\n");
+
+		pthread_attr_init(&attr);
+		pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
+		r = pthread_create(&tcp_worker_thread, &attr, tcp_worker, NULL);
+		r = pthread_create(&command_thread, &attr, command_worker, NULL);
+		pthread_attr_destroy(&attr);
+
+		r = rtlsdr_read_async(dev, rtlsdr_callback, NULL, buf_num, 0);
+
+		pthread_join(tcp_worker_thread, &status);
+		pthread_join(command_thread, &status);
+
+		closesocket(s);
+
+		printf("all threads dead..\n");
+		curelem = ll_buffers;
+		ll_buffers = 0;
+
+		while(curelem != 0) {
+			prev = curelem;
+			curelem = curelem->next;
+			free(prev->data);
+			free(prev);
+		}
+
+		do_exit = 0;
+		global_numq = 0;
+	}
+
+out:
+	rtlsdr_close(dev);
+	closesocket(listensocket);
+	closesocket(s);
+#ifdef _WIN32
+	WSACleanup();
+#endif
+	printf("bye!\n");
+	return r >= 0 ? r : -r;
+}