-/* $Id$ */
-
/***
This file is part of avahi.
-
+
avahi is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
-
+
avahi is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
Public License for more details.
-
+
You should have received a copy of the GNU Lesser General Public
License along with avahi; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
#include <config.h>
#endif
+#include <stdlib.h>
+
#include <avahi-common/timeval.h>
#include <avahi-common/malloc.h>
#include "announce.h"
#include "log.h"
+#include "rr-util.h"
#define AVAHI_ANNOUNCEMENT_JITTER_MSEC 250
#define AVAHI_PROBE_JITTER_MSEC 250
#define AVAHI_PROBE_INTERVAL_MSEC 250
-static void remove_announcement(AvahiServer *s, AvahiAnnouncement *a) {
+static void remove_announcer(AvahiServer *s, AvahiAnnouncer *a) {
assert(s);
assert(a);
if (a->time_event)
avahi_time_event_free(a->time_event);
- AVAHI_LLIST_REMOVE(AvahiAnnouncement, by_interface, a->interface->announcements, a);
- AVAHI_LLIST_REMOVE(AvahiAnnouncement, by_entry, a->entry->announcements, a);
-
+ AVAHI_LLIST_REMOVE(AvahiAnnouncer, by_interface, a->interface->announcers, a);
+ AVAHI_LLIST_REMOVE(AvahiAnnouncer, by_entry, a->entry->announcers, a);
+
avahi_free(a);
}
static void elapse_announce(AvahiTimeEvent *e, void *userdata);
-static void set_timeout(AvahiAnnouncement *a, const struct timeval *tv) {
+static void set_timeout(AvahiAnnouncer *a, const struct timeval *tv) {
assert(a);
if (!tv) {
}
} else {
- if (a->time_event)
+ if (a->time_event)
avahi_time_event_update(a->time_event, tv);
else
a->time_event = avahi_time_event_new(a->server->time_event_queue, tv, elapse_announce, a);
}
}
-static void next_state(AvahiAnnouncement *a);
+static void next_state(AvahiAnnouncer *a);
void avahi_s_entry_group_check_probed(AvahiSEntryGroup *g, int immediately) {
AvahiEntry *e;
assert(!g->dead);
/* Check whether all group members have been probed */
-
- if (g->state != AVAHI_ENTRY_GROUP_REGISTERING || g->n_probing > 0)
+
+ if (g->state != AVAHI_ENTRY_GROUP_REGISTERING || g->n_probing > 0)
return;
avahi_s_entry_group_change_state(g, AVAHI_ENTRY_GROUP_ESTABLISHED);
if (g->dead)
return;
-
- for (e = g->entries; e; e = e->entries_next) {
- AvahiAnnouncement *a;
-
- for (a = e->announcements; a; a = a->by_entry_next) {
+
+ for (e = g->entries; e; e = e->by_group_next) {
+ AvahiAnnouncer *a;
+
+ for (a = e->announcers; a; a = a->by_entry_next) {
if (a->state != AVAHI_WAITING)
continue;
-
+
a->state = AVAHI_ANNOUNCING;
if (immediately) {
/* Shortcut */
-
+
a->n_iteration = 1;
next_state(a);
} else {
}
}
-static void next_state(AvahiAnnouncement *a) {
+static void next_state(AvahiAnnouncer *a) {
assert(a);
-/* avahi_log_debug("%i -- %u", a->state, a->n_iteration); */
-
if (a->state == AVAHI_WAITING) {
assert(a->entry->group);
avahi_s_entry_group_check_probed(a->entry->group, 1);
-
+
} else if (a->state == AVAHI_PROBING) {
if (a->n_iteration >= 4) {
/* Probing done */
-
-/* char *t; */
-
-/* avahi_log_debug("Enough probes for record [%s]", t = avahi_record_to_string(a->entry->record)); */
-/* avahi_free(t); */
if (a->entry->group) {
assert(a->entry->group->n_probing);
a->entry->group->n_probing--;
}
-
+
if (a->entry->group && a->entry->group->state == AVAHI_ENTRY_GROUP_REGISTERING)
a->state = AVAHI_WAITING;
else {
struct timeval tv;
avahi_interface_post_probe(a->interface, a->entry->record, 0);
-
+
avahi_elapse_time(&tv, AVAHI_PROBE_INTERVAL_MSEC, 0);
set_timeout(a, &tv);
-
+
a->n_iteration++;
}
avahi_server_generate_response(a->server, a->interface, NULL, NULL, 0, 0, 0);
if (++a->n_iteration >= 4) {
-/* char *t; */
/* Announcing done */
-/* avahi_log_debug("Enough announcements for record [%s]", t = avahi_record_to_string(a->entry->record)); */
-/* avahi_free(t); */
-
a->state = AVAHI_ESTABLISHED;
set_timeout(a, NULL);
} else {
struct timeval tv;
avahi_elapse_time(&tv, a->sec_delay*1000, AVAHI_ANNOUNCEMENT_JITTER_MSEC);
-
+
if (a->n_iteration < 10)
a->sec_delay *= 2;
-
+
set_timeout(a, &tv);
}
}
next_state(userdata);
}
-AvahiAnnouncement *avahi_get_announcement(AvahiServer *s, AvahiEntry *e, AvahiInterface *i) {
- AvahiAnnouncement *a;
-
+static AvahiAnnouncer *get_announcer(AvahiServer *s, AvahiEntry *e, AvahiInterface *i) {
+ AvahiAnnouncer *a;
+
assert(s);
assert(e);
assert(i);
- for (a = e->announcements; a; a = a->by_entry_next)
+ for (a = e->announcers; a; a = a->by_entry_next)
if (a->interface == i)
return a;
return NULL;
}
-static void go_to_initial_state(AvahiAnnouncement *a, int immediately) {
+static void go_to_initial_state(AvahiAnnouncer *a) {
AvahiEntry *e;
struct timeval tv;
-
+
assert(a);
e = a->entry;
a->state = AVAHI_ANNOUNCING;
else
a->state = AVAHI_WAITING;
-
+
} else
a->state = AVAHI_ESTABLISHED;
if (a->state == AVAHI_PROBING && e->group)
e->group->n_probing++;
- if (a->state == AVAHI_PROBING) {
- avahi_elapse_time(&tv, 0, immediately ? 0 : AVAHI_PROBE_JITTER_MSEC);
- set_timeout(a, &tv);
- } else if (a->state == AVAHI_ANNOUNCING) {
- avahi_elapse_time(&tv, 0, immediately ? 0 : AVAHI_ANNOUNCEMENT_JITTER_MSEC);
- set_timeout(a, &tv);
- } else
+ if (a->state == AVAHI_PROBING)
+ set_timeout(a, avahi_elapse_time(&tv, 0, AVAHI_PROBE_JITTER_MSEC));
+ else if (a->state == AVAHI_ANNOUNCING)
+ set_timeout(a, avahi_elapse_time(&tv, 0, AVAHI_ANNOUNCEMENT_JITTER_MSEC));
+ else
set_timeout(a, NULL);
}
-static void new_announcement(AvahiServer *s, AvahiInterface *i, AvahiEntry *e) {
- AvahiAnnouncement *a;
-/* char *t; */
+static void new_announcer(AvahiServer *s, AvahiInterface *i, AvahiEntry *e) {
+ AvahiAnnouncer *a;
assert(s);
assert(i);
assert(e);
assert(!e->dead);
-/* avahi_log_debug("NEW ANNOUNCEMENT: %s.%i [%s]", i->hardware->name, i->protocol, t = avahi_record_to_string(e->record)); */
-/* avahi_free(t); */
-
if (!avahi_interface_match(i, e->interface, e->protocol) || !i->announcing || !avahi_entry_is_commited(e))
return;
- /* We don't want duplicate announcements */
- if (avahi_get_announcement(s, e, i))
- return;
+ /* We don't want duplicate announcers */
+ if (get_announcer(s, e, i))
+ return;
- if ((!(a = avahi_new(AvahiAnnouncement, 1)))) {
+ if ((!(a = avahi_new(AvahiAnnouncer, 1)))) {
avahi_log_error(__FILE__": Out of memory.");
return;
}
-
+
a->server = s;
a->interface = i;
a->entry = e;
a->time_event = NULL;
- AVAHI_LLIST_PREPEND(AvahiAnnouncement, by_interface, i->announcements, a);
- AVAHI_LLIST_PREPEND(AvahiAnnouncement, by_entry, e->announcements, a);
+ AVAHI_LLIST_PREPEND(AvahiAnnouncer, by_interface, i->announcers, a);
+ AVAHI_LLIST_PREPEND(AvahiAnnouncer, by_entry, e->announcers, a);
- go_to_initial_state(a, 0);
-
-/* avahi_log_debug("New announcement on interface %s.%i for entry [%s] state=%i", i->hardware->name, i->protocol, t = avahi_record_to_string(e->record), a->state); */
-/* avahi_free(t); */
+ go_to_initial_state(a);
}
void avahi_announce_interface(AvahiServer *s, AvahiInterface *i) {
AvahiEntry *e;
-
+
assert(s);
assert(i);
for (e = s->entries; e; e = e->entries_next)
if (!e->dead)
- new_announcement(s, i, e);
+ new_announcer(s, i, e);
}
static void announce_walk_callback(AvahiInterfaceMonitor *m, AvahiInterface *i, void* userdata) {
AvahiEntry *e = userdata;
-
+
assert(m);
assert(i);
assert(e);
assert(!e->dead);
- new_announcement(m->server, i, e);
+ new_announcer(m->server, i, e);
}
void avahi_announce_entry(AvahiServer *s, AvahiEntry *e) {
void avahi_announce_group(AvahiServer *s, AvahiSEntryGroup *g) {
AvahiEntry *e;
-
+
assert(s);
assert(g);
}
int avahi_entry_is_registered(AvahiServer *s, AvahiEntry *e, AvahiInterface *i) {
- AvahiAnnouncement *a;
+ AvahiAnnouncer *a;
assert(s);
assert(e);
assert(i);
assert(!e->dead);
- if (!(a = avahi_get_announcement(s, e, i)))
+ if (!(a = get_announcer(s, e, i)))
return 0;
-
+
return
a->state == AVAHI_ANNOUNCING ||
a->state == AVAHI_ESTABLISHED ||
}
int avahi_entry_is_probing(AvahiServer *s, AvahiEntry *e, AvahiInterface *i) {
- AvahiAnnouncement *a;
+ AvahiAnnouncer *a;
assert(s);
assert(e);
assert(i);
assert(!e->dead);
- if (!(a = avahi_get_announcement(s, e, i)))
+ if (!(a = get_announcer(s, e, i)))
return 0;
-/* avahi_log_debug("state: %i", a->state); */
-
return
a->state == AVAHI_PROBING ||
(a->state == AVAHI_WAITING && (e->flags & AVAHI_PUBLISH_UNIQUE));
}
void avahi_entry_return_to_initial_state(AvahiServer *s, AvahiEntry *e, AvahiInterface *i) {
- AvahiAnnouncement *a;
-
+ AvahiAnnouncer *a;
+
assert(s);
assert(e);
assert(i);
- if (!(a = avahi_get_announcement(s, e, i)))
+ if (!(a = get_announcer(s, e, i)))
return;
if (a->state == AVAHI_PROBING && a->entry->group)
a->entry->group->n_probing--;
- go_to_initial_state(a, 1);
+ go_to_initial_state(a);
}
static AvahiRecord *make_goodbye_record(AvahiRecord *r) {
-/* char *t; */
AvahiRecord *g;
-
- assert(r);
-/* avahi_log_debug("Preparing goodbye for record [%s]", t = avahi_record_to_string(r)); */
-/* avahi_free(t); */
+ assert(r);
if (!(g = avahi_record_copy(r)))
return NULL; /* OOM */
-
+
assert(g->ref == 1);
g->ttl = 0;
static int is_duplicate_entry(AvahiServer *s, AvahiEntry *e) {
AvahiEntry *i;
-
+
assert(s);
assert(e);
for (i = avahi_hashmap_lookup(s->entries_by_key, e->record->key); i; i = i->by_key_next) {
- if (i == e)
+ if ((i == e) || (i->dead))
continue;
if (!avahi_record_equal_no_ttl(i->record, e->record))
continue;
-
+
return 1;
}
static void send_goodbye_callback(AvahiInterfaceMonitor *m, AvahiInterface *i, void* userdata) {
AvahiEntry *e = userdata;
AvahiRecord *g;
-
+
assert(m);
assert(i);
assert(e);
if (is_duplicate_entry(m->server, e))
return;
-
+
if (!(g = make_goodbye_record(e->record)))
return; /* OOM */
-
+
avahi_interface_post_response(i, g, e->flags & AVAHI_PUBLISH_UNIQUE, NULL, 1);
avahi_record_unref(g);
}
-
-void avahi_goodbye_interface(AvahiServer *s, AvahiInterface *i, int goodbye) {
- assert(s);
- assert(i);
-/* avahi_log_debug("goodbye interface: %s.%u", i->hardware->name, i->protocol); */
+static void reannounce(AvahiAnnouncer *a) {
+ AvahiEntry *e;
+ struct timeval tv;
+
+ assert(a);
+ e = a->entry;
- if (goodbye && avahi_interface_is_relevant(i)) {
- AvahiEntry *e;
-
- for (e = s->entries; e; e = e->entries_next)
- if (!e->dead)
- send_goodbye_callback(s->monitor, i, e);
+ /* If the group this entry belongs to is not even commited, there's nothing to reannounce */
+ if (e->group && (e->group->state == AVAHI_ENTRY_GROUP_UNCOMMITED || e->group->state == AVAHI_ENTRY_GROUP_COLLISION))
+ return;
+
+ /* Because we might change state we decrease the probing counter first */
+ if (a->state == AVAHI_PROBING && a->entry->group)
+ a->entry->group->n_probing--;
+
+ if (a->state == AVAHI_PROBING ||
+ (a->state == AVAHI_WAITING && (e->flags & AVAHI_PUBLISH_UNIQUE) && !(e->flags & AVAHI_PUBLISH_NO_PROBE)))
+
+ /* We were probing or waiting after probe, so we restart probing from the beginning here */
+
+ a->state = AVAHI_PROBING;
+ else if (a->state == AVAHI_WAITING)
+
+ /* We were waiting, but were not probing before, so we continue waiting */
+ a->state = AVAHI_WAITING;
+
+ else if (e->flags & AVAHI_PUBLISH_NO_ANNOUNCE)
+
+ /* No announcer needed */
+ a->state = AVAHI_ESTABLISHED;
+
+ else {
+
+ /* Ok, let's restart announcing */
+ a->state = AVAHI_ANNOUNCING;
}
- while (i->announcements)
- remove_announcement(s, i->announcements);
+ /* Now let's increase the probing counter again */
+ if (a->state == AVAHI_PROBING && e->group)
+ e->group->n_probing++;
-/* avahi_log_debug("goodbye interface done: %s.%u", i->hardware->name, i->protocol); */
+ a->n_iteration = 1;
+ a->sec_delay = 1;
+
+ if (a->state == AVAHI_PROBING)
+ set_timeout(a, avahi_elapse_time(&tv, 0, AVAHI_PROBE_JITTER_MSEC));
+ else if (a->state == AVAHI_ANNOUNCING)
+ set_timeout(a, avahi_elapse_time(&tv, 0, AVAHI_ANNOUNCEMENT_JITTER_MSEC));
+ else
+ set_timeout(a, NULL);
}
-void avahi_goodbye_entry(AvahiServer *s, AvahiEntry *e, int goodbye) {
- assert(s);
+
+static void reannounce_walk_callback(AvahiInterfaceMonitor *m, AvahiInterface *i, void* userdata) {
+ AvahiEntry *e = userdata;
+ AvahiAnnouncer *a;
+
+ assert(m);
+ assert(i);
assert(e);
-
-/* avahi_log_debug("goodbye entry: %p", e); */
-
- if (goodbye && !e->dead)
- avahi_interface_monitor_walk(s->monitor, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, send_goodbye_callback, e);
+ assert(!e->dead);
- while (e->announcements)
- remove_announcement(s, e->announcements);
+ if (!(a = get_announcer(m->server, e, i)))
+ return;
-/* avahi_log_debug("goodbye entry done: %p", e); */
+ reannounce(a);
+}
+
+void avahi_reannounce_entry(AvahiServer *s, AvahiEntry *e) {
+
+ assert(s);
+ assert(e);
+ assert(!e->dead);
+ avahi_interface_monitor_walk(s->monitor, e->interface, e->protocol, reannounce_walk_callback, e);
}
-void avahi_goodbye_all(AvahiServer *s, int goodbye) {
- AvahiEntry *e;
-
+void avahi_goodbye_interface(AvahiServer *s, AvahiInterface *i, int send_goodbye, int remove) {
assert(s);
+ assert(i);
-/* avahi_log_debug("goodbye all"); */
+ if (send_goodbye)
+ if (i->announcing) {
+ AvahiEntry *e;
- for (e = s->entries; e; e = e->entries_next)
- if (!e->dead)
- avahi_goodbye_entry(s, e, goodbye);
+ for (e = s->entries; e; e = e->entries_next)
+ if (!e->dead)
+ send_goodbye_callback(s->monitor, i, e);
+ }
-/* avahi_log_debug("goodbye all done"); */
+ if (remove)
+ while (i->announcers)
+ remove_announcer(s, i->announcers);
+}
+
+void avahi_goodbye_entry(AvahiServer *s, AvahiEntry *e, int send_goodbye, int remove) {
+ assert(s);
+ assert(e);
+
+ if (send_goodbye)
+ if (!e->dead)
+ avahi_interface_monitor_walk(s->monitor, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, send_goodbye_callback, e);
+ if (remove)
+ while (e->announcers)
+ remove_announcer(s, e->announcers);
}
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