lavf/tcp: increase range for listen and call the underlying socket operations accordingly

Signed-off-by: Stephan Holljes <klaxa1337@googlemail.com>

libavformat/tcp.c

@@ -45,7 +45,7 @@ typedef struct TCPContext {
 #define D AV_OPT_FLAG_DECODING_PARAM
 #define E AV_OPT_FLAG_ENCODING_PARAM
 static const AVOption options[] = {
-    { "listen",          "Listen for incoming connections",  OFFSET(listen),         AV_OPT_TYPE_INT, { .i64 = 0 },     0,       1,       .flags = D|E },
+    { "listen",          "Listen for incoming connections",  OFFSET(listen),         AV_OPT_TYPE_INT, { .i64 = 0 },     0,       2,       .flags = D|E },
     { "timeout",     "set timeout (in microseconds) of socket I/O operations", OFFSET(rw_timeout),     AV_OPT_TYPE_INT, { .i64 = -1 },         -1, INT_MAX, .flags = D|E },
     { "listen_timeout",  "Connection awaiting timeout (in milliseconds)",      OFFSET(listen_timeout), AV_OPT_TYPE_INT, { .i64 = -1 },         -1, INT_MAX, .flags = D|E },
     { NULL }
@@ -126,12 +126,17 @@ static int tcp_open(URLContext *h, const char *uri, int flags)
         goto fail;
     }
 
-    if (s->listen) {
-        if ((ret = ff_listen_bind(fd, cur_ai->ai_addr, cur_ai->ai_addrlen,
+    if (s->listen == 2) {
+        // multi-client
+        if ((ret = ff_listen(fd, cur_ai->ai_addr, cur_ai->ai_addrlen)) < 0)
+            goto fail1;
+    } else if (s->listen == 1) {
+        // single client
+        if ((fd = ff_listen_bind(fd, cur_ai->ai_addr, cur_ai->ai_addrlen,
                                  s->listen_timeout, h)) < 0) {
+            ret = fd;
             goto fail1;
         }
-        fd = ret;
     } else {
         if ((ret = ff_listen_connect(fd, cur_ai->ai_addr, cur_ai->ai_addrlen,
                                      s->open_timeout / 1000, h, !!cur_ai->ai_next)) < 0) {