#include "announce.h"
#include "util.h"
+#define FLX_ANNOUNCEMENT_JITTER_MSEC 250
+#define FLX_PROBE_JITTER_MSEC 250
+#define FLX_PROBE_INTERVAL_MSEC 250
+
static void remove_announcement(flxServer *s, flxAnnouncement *a) {
g_assert(s);
g_assert(a);
- flx_time_event_queue_remove(s->time_event_queue, a->time_event);
+ if (a->time_event)
+ flx_time_event_queue_remove(s->time_event_queue, a->time_event);
FLX_LLIST_REMOVE(flxAnnouncement, by_interface, a->interface->announcements, a);
FLX_LLIST_REMOVE(flxAnnouncement, by_entry, a->entry->announcements, a);
g_free(a);
}
-static void elapse_announce(flxTimeEvent *e, void *userdata) {
- flxAnnouncement *a = userdata;
- GTimeVal tv;
- gchar *t;
-
- g_assert(e);
+static void elapse_announce(flxTimeEvent *e, void *userdata);
+
+static void set_timeout(flxAnnouncement *a, const GTimeVal *tv) {
g_assert(a);
- if (a->n_announced >= 3) {
- g_message("Enough announcements for record [%s]", t = flx_record_to_string(a->entry->record));
- g_free(t);
- remove_announcement(a->server, a);
+ if (!tv) {
+ if (a->time_event) {
+ flx_time_event_queue_remove(a->server->time_event_queue, a->time_event);
+ a->time_event = NULL;
+ }
+ } else {
+
+ if (a->time_event)
+ flx_time_event_queue_update(a->server->time_event_queue, a->time_event, tv);
+ else
+ a->time_event = flx_time_event_queue_add(a->server->time_event_queue, tv, elapse_announce, a);
+ }
+}
+
+static void next_state(flxAnnouncement *a);
+
+void flx_entry_group_check_probed(flxEntryGroup *g, gboolean immediately) {
+ flxEntry *e;
+ g_assert(g);
+ g_assert(!g->dead);
+
+ /* Check whether all group members have been probed */
+
+ if (g->status != FLX_ENTRY_GROUP_REGISTERING || g->n_probing > 0)
+ return;
+
+ flx_entry_group_run_callback(g, g->status = FLX_ENTRY_GROUP_ESTABLISHED);
+
+ if (g->dead)
return;
+
+ for (e = g->entries; e; e = e->entries_next) {
+ flxAnnouncement *a;
+
+ for (a = e->announcements; a; a = a->by_entry_next) {
+
+ if (a->state != FLX_WAITING)
+ continue;
+
+ a->state = FLX_ANNOUNCING;
+
+ if (immediately) {
+ /* Shortcut */
+
+ a->n_iteration = 1;
+ next_state(a);
+ } else {
+ GTimeVal tv;
+ a->n_iteration = 0;
+ flx_elapse_time(&tv, 0, FLX_ANNOUNCEMENT_JITTER_MSEC);
+ set_timeout(a, &tv);
+ }
+ }
}
+}
- flx_interface_post_response(a->interface, a->entry->record);
- a->n_announced++;
+static void next_state(flxAnnouncement *a) {
+ g_assert(a);
- g_message("Announcement #%i on interface %s.%i for entry [%s]", a->n_announced, a->interface->hardware->name, a->interface->protocol, t = flx_record_to_string(a->entry->record));
- g_free(t);
+ g_message("%i -- %u", a->state, a->n_iteration);
- flx_elapse_time(&tv, 1000, 100);
- flx_time_event_queue_update(a->server->time_event_queue, a->time_event, &tv);
+ if (a->state == FLX_WAITING) {
+
+ g_assert(a->entry->group);
+
+ flx_entry_group_check_probed(a->entry->group, TRUE);
+
+ } else if (a->state == FLX_PROBING) {
+
+ if (a->n_iteration >= 4) {
+ /* Probing done */
+
+ gchar *t;
+
+ g_message("Enough probes for record [%s]", t = flx_record_to_string(a->entry->record));
+ g_free(t);
+
+ if (a->entry->group) {
+ g_assert(a->entry->group->n_probing);
+ a->entry->group->n_probing--;
+ }
+
+ if (a->entry->group && a->entry->group->status == FLX_ENTRY_GROUP_REGISTERING)
+ a->state = FLX_WAITING;
+ else {
+ a->state = FLX_ANNOUNCING;
+ a->n_iteration = 1;
+ }
+
+ set_timeout(a, NULL);
+ next_state(a);
+ } else {
+ GTimeVal tv;
+
+ flx_interface_post_probe(a->interface, a->entry->record, FALSE);
+
+ flx_elapse_time(&tv, FLX_PROBE_INTERVAL_MSEC, 0);
+ set_timeout(a, &tv);
+
+ a->n_iteration++;
+ }
+
+ } else if (a->state == FLX_ANNOUNCING) {
+
+ flx_interface_post_response(a->interface, NULL, a->entry->record, a->entry->flags & FLX_ENTRY_UNIQUE, FALSE);
+
+ if (++a->n_iteration >= 4) {
+ gchar *t;
+ /* Announcing done */
+
+ g_message("Enough announcements for record [%s]", t = flx_record_to_string(a->entry->record));
+ g_free(t);
+
+ a->state = FLX_ESTABLISHED;
+
+ set_timeout(a, NULL);
+ } else {
+ GTimeVal tv;
+ flx_elapse_time(&tv, a->sec_delay*1000, FLX_ANNOUNCEMENT_JITTER_MSEC);
+
+ if (a->n_iteration < 10)
+ a->sec_delay *= 2;
+
+ set_timeout(a, &tv);
+ }
+ }
}
-static void new_announcement(flxServer *s, flxInterface *i, flxServerEntry *e) {
+static void elapse_announce(flxTimeEvent *e, void *userdata) {
+ g_assert(e);
+
+ next_state(userdata);
+}
+
+flxAnnouncement *flx_get_announcement(flxServer *s, flxEntry *e, flxInterface *i) {
+ flxAnnouncement *a;
+
+ g_assert(s);
+ g_assert(e);
+ g_assert(i);
+
+ for (a = e->announcements; a; a = a->by_entry_next)
+ if (a->interface == i)
+ return a;
+
+ return NULL;
+}
+
+static void new_announcement(flxServer *s, flxInterface *i, flxEntry *e) {
flxAnnouncement *a;
GTimeVal tv;
- gchar *t;
+ gchar *t;
g_assert(s);
g_assert(i);
g_assert(e);
+ g_assert(!e->dead);
- if (!flx_interface_match(i, e->interface, e->protocol) || !flx_interface_relevant(i))
+/* g_message("NEW ANNOUNCEMENT: %s.%i [%s]", i->hardware->name, i->protocol, t = flx_record_to_string(e->record)); */
+/* g_free(t); */
+
+ if (!flx_interface_match(i, e->interface, e->protocol) || !i->announcing || !flx_entry_commited(e))
+ return;
+
+ /* We don't want duplicate announcements */
+ if (flx_get_announcement(s, e, i))
return;
- /* We don't want duplicates */
- for (a = e->announcements; a; a = a->by_entry_next)
- if (a->interface == i)
- return;
-
- g_message("New announcement on interface %s.%i for entry [%s]", i->hardware->name, i->protocol, t = flx_record_to_string(e->record));
- g_free(t);
-
- flx_interface_post_response(i, e->record);
-
a = g_new(flxAnnouncement, 1);
a->server = s;
a->interface = i;
a->entry = e;
- a->n_announced = 1;
+
+ if ((e->flags & FLX_ENTRY_UNIQUE) && !(e->flags & FLX_ENTRY_NOPROBE))
+ a->state = FLX_PROBING;
+ else if (!(e->flags & FLX_ENTRY_NOANNOUNCE)) {
+
+ if (!e->group || e->group->status == FLX_ENTRY_GROUP_ESTABLISHED)
+ a->state = FLX_ANNOUNCING;
+ else
+ a->state = FLX_WAITING;
+
+ } else
+ a->state = FLX_ESTABLISHED;
+
+
+ g_message("New announcement on interface %s.%i for entry [%s] state=%i", i->hardware->name, i->protocol, t = flx_record_to_string(e->record), a->state);
+ g_free(t);
+
+ a->n_iteration = 1;
+ a->sec_delay = 1;
+ a->time_event = NULL;
+
+ if (a->state == FLX_PROBING)
+ if (e->group)
+ e->group->n_probing++;
FLX_LLIST_PREPEND(flxAnnouncement, by_interface, i->announcements, a);
FLX_LLIST_PREPEND(flxAnnouncement, by_entry, e->announcements, a);
-
- flx_elapse_time(&tv, 1000, 100);
- a->time_event = flx_time_event_queue_add(s->time_event_queue, &tv, elapse_announce, a);
+
+ if (a->state == FLX_PROBING) {
+ flx_elapse_time(&tv, 0, FLX_PROBE_JITTER_MSEC);
+ set_timeout(a, &tv);
+ } else if (a->state == FLX_ANNOUNCING) {
+ flx_elapse_time(&tv, 0, FLX_ANNOUNCEMENT_JITTER_MSEC);
+ set_timeout(a, &tv);
+ }
}
void flx_announce_interface(flxServer *s, flxInterface *i) {
- flxServerEntry *e;
+ flxEntry *e;
g_assert(s);
g_assert(i);
- if (!flx_interface_relevant(i))
+ if (!i->announcing)
return;
+
+ for (e = s->entries; e; e = e->entries_next)
+ if (!e->dead)
+ new_announcement(s, i, e);
+}
+
+static void announce_walk_callback(flxInterfaceMonitor *m, flxInterface *i, gpointer userdata) {
+ flxEntry *e = userdata;
- for (e = s->entries; e; e = e->entry_next)
- new_announcement(s, i, e);
+ g_assert(m);
+ g_assert(i);
+ g_assert(e);
+ g_assert(!e->dead);
+
+ new_announcement(m->server, i, e);
}
-void flx_announce_entry(flxServer *s, flxServerEntry *e) {
+void flx_announce_entry(flxServer *s, flxEntry *e) {
g_assert(s);
g_assert(e);
+ g_assert(!e->dead);
- if (e->interface > 0) {
+ flx_interface_monitor_walk(s->monitor, e->interface, e->protocol, announce_walk_callback, e);
+}
- if (e->protocol != AF_UNSPEC) {
- flxInterface *i;
+void flx_announce_group(flxServer *s, flxEntryGroup *g) {
+ flxEntry *e;
- if ((i = flx_interface_monitor_get_interface(s->monitor, e->interface, e->protocol)))
- new_announcement(s, i, e);
- } else {
- flxHwInterface *hw;
+ g_assert(s);
+ g_assert(g);
- if ((hw = flx_interface_monitor_get_hw_interface(s->monitor, e->interface))) {
- flxInterface *i;
+ for (e = g->entries; e; e = e->by_group_next)
+ if (!e->dead)
+ flx_announce_entry(s, e);
+}
- for (i = hw->interfaces; i; i = i->by_hardware_next)
- new_announcement(s, i, e);
- }
- }
- } else {
- flxInterface *i;
+gboolean flx_entry_registered(flxServer *s, flxEntry *e, flxInterface *i) {
+ flxAnnouncement *a;
- for (i = s->monitor->interfaces; i; i = i->interface_next)
- new_announcement(s, i, e);
- }
+ g_assert(s);
+ g_assert(e);
+ g_assert(i);
+ g_assert(!e->dead);
+
+ if (!(a = flx_get_announcement(s, e, i)))
+ return FALSE;
+
+ return a->state == FLX_ANNOUNCING || a->state == FLX_ESTABLISHED;
+}
+
+gboolean flx_entry_registering(flxServer *s, flxEntry *e, flxInterface *i) {
+ flxAnnouncement *a;
+
+ g_assert(s);
+ g_assert(e);
+ g_assert(i);
+ g_assert(!e->dead);
+
+ if (!(a = flx_get_announcement(s, e, i)))
+ return FALSE;
+
+ return a->state == FLX_PROBING || a->state == FLX_WAITING;
}
static flxRecord *make_goodbye_record(flxRecord *r) {
gchar *t;
+ flxRecord *g;
g_assert(r);
g_message("Preparing goodbye for record [%s]", t = flx_record_to_string(r));
g_free(t);
- return flx_record_new(r->key, r->data, r->size, 0);
+ g = flx_record_copy(r);
+ g_assert(g->ref == 1);
+ g->ttl = 0;
+
+ return g;
+}
+
+static void send_goodbye_callback(flxInterfaceMonitor *m, flxInterface *i, gpointer userdata) {
+ flxEntry *e = userdata;
+ flxRecord *g;
+
+ g_assert(m);
+ g_assert(i);
+ g_assert(e);
+ g_assert(!e->dead);
+
+ if (!flx_interface_match(i, e->interface, e->protocol))
+ return;
+
+ if (e->flags & FLX_ENTRY_NOANNOUNCE)
+ return;
+
+ if (!flx_entry_registered(m->server, e, i))
+ return;
+
+ g = make_goodbye_record(e->record);
+ flx_interface_post_response(i, NULL, g, e->flags & FLX_ENTRY_UNIQUE, TRUE);
+ flx_record_unref(g);
}
void flx_goodbye_interface(flxServer *s, flxInterface *i, gboolean goodbye) {
g_assert(s);
g_assert(i);
- while (i->announcements)
- remove_announcement(s, i->announcements);
+ g_message("goodbye interface: %s.%u", i->hardware->name, i->protocol);
if (goodbye && flx_interface_relevant(i)) {
- flxServerEntry *e;
+ flxEntry *e;
- for (e = s->entries; e; e = e->entry_next)
- if (flx_interface_match(i, e->interface, e->protocol)) {
- flxRecord *g = make_goodbye_record(e->record);
- flx_interface_post_response(i, g);
- flx_record_unref(g);
- }
+ for (e = s->entries; e; e = e->entries_next)
+ if (!e->dead)
+ send_goodbye_callback(s->monitor, i, e);
}
+
+ while (i->announcements)
+ remove_announcement(s, i->announcements);
+
+ g_message("goodbye interface done: %s.%u", i->hardware->name, i->protocol);
+
}
-void flx_goodbye_entry(flxServer *s, flxServerEntry *e, gboolean goodbye) {
+void flx_goodbye_entry(flxServer *s, flxEntry *e, gboolean goodbye) {
g_assert(s);
g_assert(e);
+ g_assert(!e->dead);
+
+ g_message("goodbye entry: %p", e);
+ if (goodbye)
+ flx_interface_monitor_walk(s->monitor, 0, AF_UNSPEC, send_goodbye_callback, e);
+
while (e->announcements)
remove_announcement(s, e->announcements);
-
- if (goodbye) {
- flxRecord *g = make_goodbye_record(e->record);
- flx_server_post_response(s, e->interface, e->protocol, g);
- flx_record_unref(g);
- }
+
+ g_message("goodbye entry done: %p", e);
+
}
void flx_goodbye_all(flxServer *s, gboolean goodbye) {
- flxServerEntry *e;
+ flxEntry *e;
g_assert(s);
- for (e = s->entries; e; e = e->entry_next)
- flx_goodbye_entry(s, e, goodbye);
+ g_message("goodbye all");
+
+ for (e = s->entries; e; e = e->entries_next)
+ if (!e->dead)
+ flx_goodbye_entry(s, e, goodbye);
+
+ g_message("goodbye all done");
+
}
+
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