network: factor out bind-listening code

Introduce ff_listen_bind, to be shared with the other non-tcp
network protocols.

1 files changed, 29 insertions, 0 deletions

diff --git a/libavformat/network.c b/libavformat/network.c
index f493c29e81..55d55af35d 100644
--- a/libavformat/network.c
+++ b/libavformat/network.c
@@ -187,3 +187,32 @@ int ff_is_multicast_address(struct sockaddr *addr)
 
     return 0;
 }
+
+int ff_listen_bind(int fd, const struct sockaddr *addr,
+                   socklen_t addrlen, int timeout)
+{
+    int ret;
+    int reuse = 1;
+    struct pollfd lp = { fd, POLLIN, 0 };
+    setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse));
+    ret = bind(fd, addr, addrlen);
+    if (ret)
+        return ff_neterrno();
+
+    ret = listen(fd, 1);
+    if (ret)
+        return ff_neterrno();
+
+    ret = poll(&lp, 1, timeout >= 0 ? timeout : -1);
+    if (ret <= 0)
+        return AVERROR(ETIMEDOUT);
+
+    ret = accept(fd, NULL, NULL);
+    if (ret < 0)
+        return ff_neterrno();
+
+    closesocket(fd);
+
+    ff_socket_nonblock(ret, 1);
+    return ret;
+}