From: Hannes Schmelzer &lt;oe5hpm(a)oevsv.at&gt; It is very inconvenient to have some RTL-stick on a machine with multiple network interfaces if it is bound to a specific one. So we break up this and make this dynamically. The -a option therefore is not needed any longer. Signed-off-by: Hannes Schmelzer &lt;oe5hpm(a)oevsv.at&gt; --- src/rtl_tcp.c | 34 ++++++++++++++++++---------------- 1 file changed, 18 insertions(+), 16 deletions(-) diff --git a/src/rtl_tcp.c b/src/rtl_tcp.c index 317e0f3..39d7c3e 100644 --- a/src/rtl_tcp.c +++ b/src/rtl_tcp.c @@ -31,6 +31,7 @@ #include <sys/socket.h> #include <sys/time.h> #include <netinet/in.h> +#include <netdb.h> #include <fcntl.h> #else #include <winsock2.h> @@ -365,10 +366,10 @@ static void *command_worker(void *arg) int main(int argc, char **argv) { int r, opt, i; - char* addr = "127.0.0.1"; - int port = 1234; + char* port = "1234"; uint32_t frequency = 100000000, samp_rate = 2048000; - struct sockaddr_in local, remote; + struct addrinfo hints, *res; + struct sockaddr_in remote; uint32_t buf_num = 0; int dev_index = 0; int dev_given = 0; @@ -391,7 +392,7 @@ int main(int argc, char **argv) struct sigaction sigact, sigign; #endif - while ((opt = getopt(argc, argv, "a:p:f:g:s:b:n:d:P:")) != -1) { + while ((opt = getopt(argc, argv, "p:f:g:s:b:n:d:P:")) != -1) { switch (opt) { case 'd': dev_index = verbose_device_search(optarg); @@ -406,11 +407,8 @@ int main(int argc, char **argv) case 's': samp_rate = (uint32_t)atofs(optarg); break; - case 'a': - addr = optarg; - break; case 'p': - port = atoi(optarg); + port = optarg; break; case 'b': buf_num = atoi(optarg); @@ -502,16 +500,20 @@ int main(int argc, char **argv) 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); + memset(&hints, 0, sizeof(hints)); + hints.ai_family = AF_INET; + hints.ai_socktype = SOCK_STREAM; + hints.ai_flags = AI_PASSIVE; /* fill in my IP for me */ + hints.ai_protocol = IPPROTO_TCP; + getaddrinfo(NULL, port, &hints, &res); + + listensocket = socket(res->ai_family, + res->ai_socktype, res->ai_protocol); - 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)); + bind(listensocket, res->ai_addr, res->ai_addrlen); #ifdef _WIN32 ioctlsocket(listensocket, FIONBIO, &blockmode); @@ -522,11 +524,11 @@ int main(int argc, char **argv) while(1) { printf("listening...\n"); - printf("Use the device argument 'rtl_tcp=%s:%d' in OsmoSDR " + 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", - addr, port); + "yourip", port); listen(listensocket,1); while(1) { -- 1.9.1