From: Sven M. Hallberg <pesco@khjk.org>
Date: Wed, 3 Sep 2014 12:50:44 +0000 (+0200)
Subject: work around picky SO_REUSEADDR semantics on Windows
X-Git-Url: https://git.meshlink.io/?a=commitdiff_plain;h=f5e8cf973023b76f479c0db9269d08dd3b1d477d;p=catta

work around picky SO_REUSEADDR semantics on Windows
---

diff --git a/src/socket.c b/src/socket.c
index cfb3b7d..4145899 100644
--- a/src/socket.c
+++ b/src/socket.c
@@ -191,6 +191,16 @@ static int bind_with_warn(int fd, const struct sockaddr *sa, socklen_t l) {
     assert(sa);
     assert(l > 0);
 
+#ifdef _WIN32
+    // Windows does not allow address reuse when SO_REUSEADDR was set after
+    // bind() on the first socket, so we must set it before.
+    // Note that this spoils the detection trickery below and the warning will
+    // not be logged.
+
+    if (reuseaddr(fd) < 0)
+        return -1;
+#endif
+
     if (bind(fd, sa, l) < 0) {
 
         if (errno != EADDRINUSE) {