From 4247c03f559776793fcc4f28706d3bf0bced57b9 Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Sun, 22 May 2005 02:03:53 +0000 Subject: rename resolve.[ch] to browse.[ch] git-svn-id: file:///home/lennart/svn/public/avahi/trunk@84 941a03a8-eaeb-0310-b9a0-b1bbd8fe43fe --- avahi-core/browse.c | 215 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 215 insertions(+) create mode 100644 avahi-core/browse.c (limited to 'avahi-core/browse.c') diff --git a/avahi-core/browse.c b/avahi-core/browse.c new file mode 100644 index 0000000..c959831 --- /dev/null +++ b/avahi-core/browse.c @@ -0,0 +1,215 @@ +/* $Id$ */ + +/*** + 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 + USA. +***/ + +#ifdef HAVE_CONFIG_H +#include +#endif + +#include "browse.h" +#include "util.h" + +struct AvahiRecordBrowser { + gboolean dead; + + AvahiServer *server; + AvahiKey *key; + gint interface; + guchar protocol; + gint n_query; + guint sec_delay; + + AvahiTimeEvent *time_event; + + AvahiRecordBrowserCallback callback; + gpointer userdata; + + AVAHI_LLIST_FIELDS(AvahiRecordBrowser, resolver); + AVAHI_LLIST_FIELDS(AvahiRecordBrowser, by_key); +}; + +static void elapse(AvahiTimeEvent *e, void *userdata) { + AvahiRecordBrowser *s = userdata; + GTimeVal tv; +/* gchar *t; */ + + g_assert(s); + + avahi_server_post_query(s->server, s->interface, s->protocol, s->key); + + if (s->n_query++ <= 8) + s->sec_delay *= 2; + +/* g_message("%i. Continuous querying for %s", s->n_query, t = avahi_key_to_string(s->key)); */ +/* g_free(t); */ + + avahi_elapse_time(&tv, s->sec_delay*1000, 0); + avahi_time_event_queue_update(s->server->time_event_queue, s->time_event, &tv); +} + +struct cbdata { + AvahiRecordBrowser *record_browser; + AvahiInterface *interface; +}; + +static gpointer scan_cache_callback(AvahiCache *c, AvahiKey *pattern, AvahiCacheEntry *e, gpointer userdata) { + struct cbdata *cbdata = userdata; + + g_assert(c); + g_assert(pattern); + g_assert(e); + g_assert(cbdata); + + if (cbdata->record_browser->dead) + return NULL; + + cbdata->record_browser->callback( + cbdata->record_browser, + cbdata->interface->hardware->index, + cbdata->interface->protocol, + AVAHI_BROWSER_NEW, + e->record, + cbdata->record_browser->userdata); + + return NULL; +} + +static void scan_interface_callback(AvahiInterfaceMonitor *m, AvahiInterface *i, gpointer userdata) { + AvahiRecordBrowser *s = userdata; + struct cbdata cbdata = { s, i }; + + g_assert(m); + g_assert(i); + g_assert(s); + + avahi_cache_walk(i->cache, s->key, scan_cache_callback, &cbdata); +} + +AvahiRecordBrowser *avahi_record_browser_new(AvahiServer *server, gint interface, guchar protocol, AvahiKey *key, AvahiRecordBrowserCallback callback, gpointer userdata) { + AvahiRecordBrowser *b, *t; + GTimeVal tv; + + g_assert(server); + g_assert(key); + g_assert(callback); + + g_assert(!avahi_key_is_pattern(key)); + + b = g_new(AvahiRecordBrowser, 1); + b->dead = FALSE; + b->server = server; + b->key = avahi_key_ref(key); + b->interface = interface; + b->protocol = protocol; + b->callback = callback; + b->userdata = userdata; + b->n_query = 1; + b->sec_delay = 1; + + avahi_server_post_query(b->server, b->interface, b->protocol, b->key); + + avahi_elapse_time(&tv, b->sec_delay*1000, 0); + b->time_event = avahi_time_event_queue_add(server->time_event_queue, &tv, elapse, b); + + AVAHI_LLIST_PREPEND(AvahiRecordBrowser, resolver, server->record_browsers, b); + + /* Add the new entry to the record_browser hash table */ + t = g_hash_table_lookup(server->record_browser_hashtable, key); + AVAHI_LLIST_PREPEND(AvahiRecordBrowser, by_key, t, b); + g_hash_table_replace(server->record_browser_hashtable, key, t); + + /* Scan the caches */ + avahi_interface_monitor_walk(b->server->monitor, b->interface, b->protocol, scan_interface_callback, b); + + return b; +} + +void avahi_record_browser_free(AvahiRecordBrowser *b) { + g_assert(b); + g_assert(!b->dead); + + b->dead = TRUE; + b->server->need_browser_cleanup = TRUE; + + if (b->time_event) { + avahi_time_event_queue_remove(b->server->time_event_queue, b->time_event); + b->time_event = NULL; + } +} + +void avahi_record_browser_destroy(AvahiRecordBrowser *b) { + AvahiRecordBrowser *t; + + g_assert(b); + + AVAHI_LLIST_REMOVE(AvahiRecordBrowser, resolver, b->server->record_browsers, b); + + t = g_hash_table_lookup(b->server->record_browser_hashtable, b->key); + AVAHI_LLIST_REMOVE(AvahiRecordBrowser, by_key, t, b); + if (t) + g_hash_table_replace(b->server->record_browser_hashtable, t->key, t); + else + g_hash_table_remove(b->server->record_browser_hashtable, b->key); + + if (b->time_event) + avahi_time_event_queue_remove(b->server->time_event_queue, b->time_event); + avahi_key_unref(b->key); + + g_free(b); +} + +void avahi_browser_cleanup(AvahiServer *server) { + AvahiRecordBrowser *b; + AvahiRecordBrowser *n; + + g_assert(server); + + for (b = server->record_browsers; b; b = n) { + n = b->resolver_next; + + if (b->dead) + avahi_record_browser_destroy(b); + } + + server->need_browser_cleanup = FALSE; +} + +void avahi_browser_notify(AvahiServer *server, AvahiInterface *i, AvahiRecord *record, AvahiBrowserEvent event) { + AvahiRecordBrowser *b; + + g_assert(server); + g_assert(record); + + for (b = g_hash_table_lookup(server->record_browser_hashtable, record->key); b; b = b->by_key_next) + if (!b->dead && avahi_interface_match(i, b->interface, b->protocol)) + b->callback(b, i->hardware->index, i->protocol, event, record, b->userdata); +} + +gboolean avahi_is_subscribed(AvahiServer *server, AvahiInterface *i, AvahiKey *k) { + AvahiRecordBrowser *b; + g_assert(server); + g_assert(k); + + for (b = g_hash_table_lookup(server->record_browser_hashtable, k); b; b = b->by_key_next) + if (!b->dead && avahi_interface_match(i, b->interface, b->protocol)) + return TRUE; + + return FALSE; +} -- cgit