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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
This commit is contained in:
Philipp Maier 2018-08-23 20:18:55 +02:00 committed by Harald Welte
parent 73196e77fb
commit b8a91625dd
1 changed files with 3 additions and 1 deletions
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4
src/gsmtap_util.c
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@ -254,7 +254,9 @@ int gsmtap_source_add_sink_fd(int gsmtap_fd)
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;
}