gsmtap_util: make sure SO_REUSEADDR is applied for GSMTAP
When gsmtap adding a new sink it does not supply OSMO_SOCK_F_UDP_REUSEADDR
in order to have SO_REUSEADDR applied. In most cases, the gsmtap sink is
just receiving packets to toss them immediately, so having one of them
is sufficient. However, in other use cases - particularly virt_phy -
we actually want to receve and process GSMTAP messages via multicast
Applying SO_REUSEADDR (like we did before disabling it globally for UDP
in I4a8ffb8d598aca88801a4a0322944d7cdd8d4047 on August 1st) resolves
the issue.
Change-Id: I1399a428467ca12f1564a14eb8ffb294d4f59874
Related: OS#3497
diff --git a/src/gsmtap_util.c b/src/gsmtap_util.c
index b21c690..385b467 100644
--- a/src/gsmtap_util.c
+++ b/src/gsmtap_util.c
@@ -254,7 +254,9 @@
if (osmo_sockaddr_is_local((struct sockaddr *)&ss, ss_len) == 1) {
rc = osmo_sock_init_sa((struct sockaddr *)&ss, SOCK_DGRAM,
- IPPROTO_UDP, OSMO_SOCK_F_BIND);
+ IPPROTO_UDP,
+ OSMO_SOCK_F_BIND |
+ OSMO_SOCK_F_UDP_REUSEADDR);
if (rc >= 0)
return rc;
}