static void job_mark_done(AvahiQueryScheduler *s, AvahiQueryJob *qj) {
assert(s);
assert(qj);
assert(!qj->done);
AVAHI_LLIST_REMOVE(AvahiQueryJob, jobs, s->jobs, qj);
AVAHI_LLIST_PREPEND(AvahiQueryJob, jobs, s->history, qj);
qj->done = 1;
job_set_elapse_time(s, qj, AVAHI_QUERY_HISTORY_MSEC, 0);
gettimeofday(&qj->delivery, NULL);
}
static void job_mark_done(AvahiProbeScheduler *s, AvahiProbeJob *pj) {
assert(s);
assert(pj);
assert(!pj->done);
AVAHI_LLIST_REMOVE(AvahiProbeJob, jobs, s->jobs, pj);
AVAHI_LLIST_PREPEND(AvahiProbeJob, jobs, s->history, pj);
pj->done = 1;
job_set_elapse_time(s, pj, AVAHI_PROBE_HISTORY_MSEC, 0);
gettimeofday(&pj->delivery, NULL);
}
static void job_mark_done(AvahiResponseScheduler *s, AvahiResponseJob *rj) {
assert(s);
assert(rj);
assert(rj->state == AVAHI_SCHEDULED);
AVAHI_LLIST_REMOVE(AvahiResponseJob, jobs, s->jobs, rj);
AVAHI_LLIST_PREPEND(AvahiResponseJob, jobs, s->history, rj);
rj->state = AVAHI_DONE;
job_set_elapse_time(s, rj, AVAHI_RESPONSE_HISTORY_MSEC, 0);
gettimeofday(&rj->delivery, NULL);
}
void avahi_response_scheduler_suppress(AvahiResponseScheduler *s, AvahiRecord *record, const AvahiAddress *querier) {
AvahiResponseJob *rj;
assert(s);
assert(record);
assert(querier);
if ((rj = find_scheduled_job(s, record))) {
if (rj->querier_valid && avahi_address_cmp(querier, &rj->querier) == 0 && /* same originator */
avahi_record_is_goodbye(record) == avahi_record_is_goodbye(rj->record) && /* both goodbye packets, or both not */
record->ttl >= rj->record->ttl/2) { /* sensible TTL */
/* A matching entry was found, so let's drop it */
/* avahi_log_debug("Known answer suppression active!"); */
job_free(s, rj);
}
}
if ((rj = find_suppressed_job(s, record, querier))) {
/* Let's update the old entry */
avahi_record_unref(rj->record);
rj->record = avahi_record_ref(record);
} else {
/* Create a new entry */
if (!(rj = job_new(s, record, AVAHI_SUPPRESSED)))
return; /* OOM */
rj->querier_valid = 1;
rj->querier = *querier;
}
gettimeofday(&rj->delivery, NULL);
job_set_elapse_time(s, rj, AVAHI_RESPONSE_SUPPRESS_MSEC, 0);
}
void avahi_response_scheduler_incoming(AvahiResponseScheduler *s, AvahiRecord *record, int flush_cache) {
AvahiResponseJob *rj;
assert(s);
/* This function is called whenever an incoming response was
* receieved. We drop scheduled responses which match here. The
* keyword is "DUPLICATE ANSWER SUPPRESION". */
if ((rj = find_scheduled_job(s, record))) {
if ((!rj->flush_cache || flush_cache) && /* flush cache bit was set correctly */
avahi_record_is_goodbye(record) == avahi_record_is_goodbye(rj->record) && /* both goodbye packets, or both not */
record->ttl >= rj->record->ttl/2) { /* sensible TTL */
/* A matching entry was found, so let's mark it done */
/* avahi_log_debug("Response suppressed by distributed duplicate suppression"); */
job_mark_done(s, rj);
}
return;
}
if ((rj = find_history_job(s, record))) {
/* Found a history job, let's update it */
avahi_record_unref(rj->record);
rj->record = avahi_record_ref(record);
} else
/* Found no existing history job, so let's create a new one */
if (!(rj = job_new(s, record, AVAHI_DONE)))
return; /* OOM */
rj->flush_cache = flush_cache;
rj->querier_valid = 0;
gettimeofday(&rj->delivery, NULL);
job_set_elapse_time(s, rj, AVAHI_RESPONSE_HISTORY_MSEC, 0);
}
void avahi_query_scheduler_incoming(AvahiQueryScheduler *s, AvahiKey *key) {
AvahiQueryJob *qj;
assert(s);
assert(key);
/* This function is called whenever an incoming query was
* received. We drop scheduled queries that match. The keyword is
* "DUPLICATE QUESTION SUPPRESION". */
if ((qj = find_scheduled_job(s, key))) {
job_mark_done(s, qj);
return;
}
/* Look if there's a history job for this key. If there is, just
* update the elapse time */
if (!(qj = find_history_job(s, key)))
if (!(qj = job_new(s, key, 1)))
return; /* OOM */
gettimeofday(&qj->delivery, NULL);
job_set_elapse_time(s, qj, AVAHI_QUERY_HISTORY_MSEC, 0);
}
