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From 8d7edcaf79ce5a439f40ca50c020a097cbe8d8eb Mon Sep 17 00:00:00 2001
From: Nicolas Cavallari <nicolas.cavallari@green-communications.fr>
Date: Wed, 25 Nov 2015 16:31:39 +0100
Subject: [PATCH] Fix not publishing entries if a probing interface is removed.

If an interface is no longer relevant for mDNS while an announcer was
probing on this interface, the announcer is removed but the n_probing
counter of the entry group is not updated.   So n_probing would never
reach zero and the entry group would stay  forever in the REGISTERING
state.  If the entry group is for a host resource record,  the daemon
could stay in the registering phase forever and would not publish any
service.

Fix that by decrementing group->n_probing when removing an announcer
in the PROBING state. Also handle the case where the entry group was
waiting for the deleted announcer to become registered.

(cherry-picked from PR https://github.com/lathiat/avahi/pull/39)

Resolves: #1222646
---
 avahi-core/announce.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/avahi-core/announce.c b/avahi-core/announce.c
index ccdbf15..05053cf 100644
--- a/avahi-core/announce.c
+++ b/avahi-core/announce.c
@@ -44,6 +44,12 @@ static void remove_announcer(AvahiServer *s, AvahiAnnouncer *a) {
     AVAHI_LLIST_REMOVE(AvahiAnnouncer, by_interface, a->interface->announcers, a);
     AVAHI_LLIST_REMOVE(AvahiAnnouncer, by_entry, a->entry->announcers, a);
 
+    if (a->state == AVAHI_PROBING && a->entry->group) {
+	assert(a->entry->group->n_probing);
+	a->entry->group->n_probing--;
+	avahi_s_entry_group_check_probed(a->entry->group, 1);
+    }
+
     avahi_free(a);
 }
 
-- 
2.7.4