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add initial version of tcp server

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This commit is contained in:
Hoernchen 2012-04-19 17:46:52 +02:00 committed by Steve Markgraf
parent 6b99aedc4d
commit d55b491c43
4 changed files with 486 additions and 2 deletions
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1
AUTHORS
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@ -1,2 +1,3 @@
Steve Markgraf <steve@steve-m.de>
Dimitri Stolnikov <horiz0n@gmx.net>
Hoernchen <la@tfc-server.de>

8
src/CMakeLists.txt
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@ -58,18 +58,24 @@ endif()
# Build utility
########################################################################
add_executable(rtl_sdr main.c)
add_executable(rtl_tcp rtl_tcp.c)
target_link_libraries(rtl_sdr rtlsdr_static
${LIBUSB_LIBRARIES}
${CMAKE_THREAD_LIBS_INIT}
)
target_link_libraries(rtl_tcp rtlsdr_static
${LIBUSB_LIBRARIES}
${CMAKE_THREAD_LIBS_INIT}
)
if(WIN32)
set_property(TARGET rtl_sdr APPEND PROPERTY COMPILE_DEFINITIONS "rtlsdr_STATIC" )
set_property(TARGET rtl_tcp APPEND PROPERTY COMPILE_DEFINITIONS "rtlsdr_STATIC" )
endif()
########################################################################
# Install built library files & utilities
########################################################################
install(TARGETS rtlsdr_shared rtlsdr_static rtl_sdr
install(TARGETS rtlsdr_shared rtlsdr_static rtl_sdr rtl_tcp
LIBRARY DESTINATION lib${LIB_SUFFIX} # .so/.dylib file
ARCHIVE DESTINATION lib${LIB_SUFFIX} # .lib file
RUNTIME DESTINATION bin # .dll file

5
src/Makefile.am
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@ -10,6 +10,9 @@ lib_LTLIBRARIES = librtlsdr.la
librtlsdr_la_SOURCES = rtl-sdr.c tuner_e4000.c tuner_fc0012.c tuner_fc0013.c tuner_fc2580.c
librtlsdr_la_LDFALGS = -version-info $(LIBVERSION)
bin_PROGRAMS = rtl_sdr
bin_PROGRAMS = rtl_sdr rtl_tcp
rtl_sdr_SOURCES = main.c
rtl_sdr_LDADD = librtlsdr.la
rtl_tcp_SOURCES = rtl_tcp.c
rtl_tcp_LDADD = librtlsdr.la

474
src/rtl_tcp.c Normal file
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@ -0,0 +1,474 @@
/*
* 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 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>
#include <math.h>
#ifndef _WIN32
#include <unistd.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <fcntl.h>
#endif
#include <pthread.h>
#include <libusb.h>
#include "rtl-sdr.h"
#ifdef _WIN32
#pragma comment(lib, "ws2_32.lib")
#else
#define closesocket close
#define SOCKADDR struct sockaddr
#define SOCKET int
#define SOCKET_ERROR -1
#endif
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 volatile int dead[2] = {0, 0};
static pthread_mutex_t ll_mutex;
static pthread_cond_t cond;
struct llist {
char *data;
size_t len;
struct llist *next;
};
static rtlsdr_dev_t *dev = NULL;
int global_numq = 0;
static struct llist *ll_buffers = 0;
static int do_exit = 0;
void usage(void)
{
#ifdef _WIN32
printf("rtl-sdr, an I/Q recorder for RTL2832 based USB-sticks\n\n"
"Usage:\t rtl-sdr-win.exe [listen addr] [listen port] "
"[samplerate in kHz] [frequency in hz]\n");
#else
printf("rtl-sdr, an I/Q recorder for RTL2832 based USB-sticks\n\n"
"Usage:\t -a listen address\n"
"\t[-p listen port (default: 1234)\n"
"\t -f frequency to tune to [Hz]\n"
"\t[-s samplerate in kHz (default: 2048 kHz)]\n"
"\toutput filename\n");
#endif
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;
tmp -= 11644473600000000Ui64;
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");
do_exit = 1;
rtlsdr_cancel_async(dev);
}
#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++;
}
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+1;
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);
dead[0]=1;
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);
r = select(0+1, NULL, &writefds, NULL, &tv);
if(r) {
bytessent = send(s, &curelem->data[index], bytesleft, 0);
if (bytessent == SOCKET_ERROR || do_exit) {
printf("worker socket error\n");
sighandler(0);
dead[0]=1;
pthread_exit(NULL);
} else {
bytesleft -= bytessent;
index += bytessent;
}
} else if(do_exit) {
printf("worker socket bye\n");
sighandler(0);
dead[0]=1;
pthread_exit(NULL);
}
}
prev = curelem;
curelem = curelem->next;
free(prev->data);
free(prev);
}
}
}
#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;
fd_set readfds;
struct command cmd={0, 0};
struct timeval tv= {1, 0};
int r =0;
while(1) {
left=sizeof(cmd);
while(left >0) {
FD_ZERO(&readfds);
FD_SET(s, &readfds);
r = select(0+1, &readfds, NULL, NULL, &tv);
if(r) {
received = recv(s, (char*)&cmd+(sizeof(cmd)-left), left, 0);
if(received == SOCKET_ERROR || do_exit){
printf("comm recv socket error\n");
sighandler(0);
dead[1]=1;
pthread_exit(NULL);
} else {
left -= received;
}
} else if(do_exit) {
printf("comm recv bye\n");
sighandler(0);
dead[1] = 1;
pthread_exit(NULL);
}
}
switch(cmd.cmd) {
case 0x01:
printf("set freq %d\n", cmd.param);
rtlsdr_set_center_freq(dev, cmd.param);
break;
default:
break;
}
cmd.cmd = 0xff;
}
}
int main(int argc, char **argv)
{
int r, opt, i;
char* addr;
int port = 1234;
uint32_t frequency = 0, samp_rate = 2048000;
struct sockaddr_in local, remote;
int device_count;
uint32_t dev_index = 0, gain = 5;
struct llist *curelem,*prev;
pthread_attr_t attr;
void *status;
struct timeval tv = {1,0};
struct linger ling = {1,0};
SOCKET listensocket;
fd_set readfds;
u_long blockmode = 1;
#ifdef _WIN32
WSADATA wsd;
i = WSAStartup(MAKEWORD(2,2), &wsd);
#endif
#ifndef _WIN32
struct sigaction sigact;
while ((opt = getopt(argc, argv, "a:p:f:s:")) != -1) {
switch (opt) {
case 'f':
frequency = atoi(optarg);
break;
case 's':
samp_rate = atoi(optarg);
break;
case 'a':
addr = optarg;
break;
case 'p':
port = atoi(optarg);
break;
default:
usage();
break;
}
}
if (argc <= optind)
usage();
#else
if(argc < 6)
usage();
dev_index = atoi(argv[5]);
frequency = atoi(argv[4]);
samp_rate = atoi(argv[3])*1000;
port = atoi(argv[2]);
addr = argv[1];
#endif
printf("listen addr %s:%d\n", addr, port);
device_count = rtlsdr_get_device_count();
if (!device_count) {
fprintf(stderr, "No supported devices found.\n");
exit(1);
}
printf("Found %d device(s).\n", device_count);
rtlsdr_open(&dev, dev_index);
if (NULL == dev) {
fprintf(stderr, "Failed to open rtlsdr device #%d.\n", dev_index);
exit(1);
}
printf("Using %s\n", rtlsdr_get_device_name(dev_index));
#ifndef _WIN32
sigact.sa_handler = sighandler;
sigemptyset(&sigact.sa_mask);
sigact.sa_flags = 0;
sigaction(SIGINT, &sigact, NULL);
sigaction(SIGTERM, &sigact, NULL);
sigaction(SIGQUIT, &sigact, NULL);
#else
SetConsoleCtrlHandler( (PHANDLER_ROUTINE) sighandler, TRUE );
#endif
/* 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);
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 %i dB.\n", gain);
/* 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);
memset(&local,0,sizeof(local));
local.sin_family = AF_INET;
local.sin_port = htons(port);
local.sin_addr.s_addr = inet_addr(addr);
listensocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
r = 1;
setsockopt(listensocket, SOL_SOCKET, SO_REUSEADDR, (char *)&r, sizeof(int));
setsockopt(listensocket, SOL_SOCKET, SO_LINGER, (char *)&ling, sizeof(ling));
bind(listensocket,(struct sockaddr *)&local,sizeof(local));
#ifdef _WIN32
ioctlsocket(listensocket, FIONBIO, &blockmode);
#else
r = fcntl(listensocket, F_GETFL, 0);
fcntl(listensocket, F_SETFL, r | O_NONBLOCK);
#endif
while(1) {
printf("listening...\n");
listen(listensocket,1);
while(1) {
FD_ZERO(&readfds);
FD_SET(listensocket, &readfds);
r = select(0+1, &readfds, NULL, NULL, &tv);
if(do_exit) {
goto out;
} else if(r) {
r=sizeof(remote);
s = accept(listensocket,(struct sockaddr *)&remote, &r);
break;
}
}
setsockopt(s, SOL_SOCKET, SO_LINGER, (char *)&ling, sizeof(ling));
printf("client accepted!\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);
rtlsdr_wait_async(dev, rtlsdr_callback, (void *)0);
closesocket(s);
if(!dead[0]){
pthread_join(tcp_worker_thread, &status);
}
if(!dead[1]){
pthread_join(command_thread, &status);
}
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;
}