network plugin: Set SO_REUSEADDR on socket so multiple listeners can share port

This patch allows other programs to bind same port and process data from clients
not interfering with master collectd server.

Signed-off-by: Florian Forster <octo@huhu.verplant.org>

diff --git a/src/network.c b/src/network.c
index 21b9694..ab04f4c 100644 (file)
--- a/src/network.c
+++ b/src/network.c
@@ -683,6 +683,15 @@ static int network_bind_socket (const sockent_t *se, const struct addrinfo *ai)
 {
        int loop = 0;
 
+       /* allow multiple sockets to use the same PORT number */
+       if (setsockopt(se->fd, SOL_SOCKET, SO_REUSEADDR,
+                               &loop, sizeof(loop)) == -1) {
+                char errbuf[1024];
+                ERROR ("setsockopt: %s", 
+                                sstrerror (errno, errbuf, sizeof (errbuf)));
+               return (-1);
+       }
+
        DEBUG ("fd = %i; calling `bind'", se->fd);
 
        if (bind (se->fd, ai->ai_addr, ai->ai_addrlen) == -1)