4 This file is part of avahi.
6 avahi is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as
8 published by the Free Software Foundation; either version 2.1 of the
9 License, or (at your option) any later version.
11 avahi is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
14 Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with avahi; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
31 struct AvahiServiceResolver {
36 guchar address_protocol;
41 AvahiRecordBrowser *record_browser_srv;
42 AvahiRecordBrowser *record_browser_txt;
43 AvahiRecordBrowser *record_browser_a;
44 AvahiRecordBrowser *record_browser_aaaa;
46 AvahiRecord *srv_record, *txt_record, *address_record;
48 AvahiServiceResolverCallback callback;
51 AvahiTimeEvent *time_event;
53 AVAHI_LLIST_FIELDS(AvahiServiceResolver, resolver);
56 static void finish(AvahiServiceResolver *r, AvahiResolverEvent event) {
59 if (r->record_browser_a) {
60 avahi_record_browser_free(r->record_browser_a);
61 r->record_browser_a = NULL;
64 if (r->record_browser_aaaa) {
65 avahi_record_browser_free(r->record_browser_aaaa);
66 r->record_browser_aaaa = NULL;
69 if (r->record_browser_srv) {
70 avahi_record_browser_free(r->record_browser_srv);
71 r->record_browser_srv = NULL;
74 if (r->record_browser_txt) {
75 avahi_record_browser_free(r->record_browser_txt);
76 r->record_browser_txt = NULL;
79 avahi_time_event_queue_remove(r->server->time_event_queue, r->time_event);
82 if (event == AVAHI_RESOLVER_TIMEOUT)
83 r->callback(r, r->interface, r->protocol, event, r->service_name, r->service_type, r->domain_name, NULL, NULL, 0, NULL, r->userdata);
86 gchar sn[256], st[256];
89 g_assert(r->srv_record);
90 g_assert(r->txt_record);
91 g_assert(r->address_record);
93 switch (r->address_record->key->type) {
94 case AVAHI_DNS_TYPE_A:
96 a.data.ipv4 = r->address_record->data.a.address;
99 case AVAHI_DNS_TYPE_AAAA:
101 a.data.ipv6 = r->address_record->data.aaaa.address;
108 snprintf(sn, sizeof(sn), r->service_name);
109 snprintf(st, sizeof(st), r->service_type);
111 if ((i = strlen(sn)) > 0 && sn[i-1] == '.')
114 if ((i = strlen(st)) > 0 && st[i-1] == '.')
117 r->callback(r, r->interface, r->protocol, event, sn, st, r->domain_name, r->srv_record->data.srv.name, &a, r->srv_record->data.srv.port, r->txt_record->data.txt.string_list, r->userdata);
122 static void record_browser_callback(AvahiRecordBrowser*rr, gint interface, guchar protocol, AvahiBrowserEvent event, AvahiRecord *record, gpointer userdata) {
123 AvahiServiceResolver *r = userdata;
129 if (!(event == AVAHI_BROWSER_NEW))
132 if (r->interface > 0 && interface != r->interface)
135 if (r->protocol != AF_UNSPEC && protocol != r->protocol)
138 if (r->interface <= 0)
139 r->interface = interface;
141 if (r->protocol == AF_UNSPEC)
142 r->protocol = protocol;
144 switch (record->key->type) {
145 case AVAHI_DNS_TYPE_SRV:
146 if (!r->srv_record) {
147 r->srv_record = avahi_record_ref(record);
149 g_assert(!r->record_browser_a && !r->record_browser_aaaa);
151 if (r->address_protocol == AF_INET || r->address_protocol == AF_UNSPEC) {
152 AvahiKey *k = avahi_key_new(r->srv_record->data.srv.name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_A);
153 r->record_browser_a = avahi_record_browser_new(r->server, r->interface, r->protocol, k, record_browser_callback, r);
157 if (r->address_protocol == AF_INET6 || r->address_protocol == AF_UNSPEC) {
158 AvahiKey *k = avahi_key_new(r->srv_record->data.srv.name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_AAAA);
159 r->record_browser_aaaa = avahi_record_browser_new(r->server, r->interface, r->protocol, k, record_browser_callback, r);
165 case AVAHI_DNS_TYPE_TXT:
167 r->txt_record = avahi_record_ref(record);
170 case AVAHI_DNS_TYPE_A:
171 case AVAHI_DNS_TYPE_AAAA:
172 if (!r->address_record)
173 r->address_record = avahi_record_ref(record);
180 if (r->txt_record && r->srv_record && r->address_record)
181 finish(r, AVAHI_RESOLVER_FOUND);
184 static void time_event_callback(AvahiTimeEvent *e, void *userdata) {
185 AvahiServiceResolver *r = userdata;
190 finish(r, AVAHI_RESOLVER_TIMEOUT);
193 AvahiServiceResolver *avahi_service_resolver_new(AvahiServer *server, gint interface, guchar protocol, const gchar *name, const gchar *type, const gchar *domain, guchar aprotocol, AvahiServiceResolverCallback callback, gpointer userdata) {
194 AvahiServiceResolver *r;
205 g_assert(aprotocol == AF_UNSPEC || aprotocol == AF_INET || aprotocol == AF_INET6);
207 r = g_new(AvahiServiceResolver, 1);
209 r->service_name = avahi_normalize_name(name);
210 r->service_type = avahi_normalize_name(type);
211 r->domain_name = avahi_normalize_name(domain);
212 r->callback = callback;
213 r->userdata = userdata;
214 r->address_protocol = aprotocol;
215 r->srv_record = r->txt_record = r->address_record = NULL;
216 r->interface = interface;
217 r->protocol = protocol;
221 avahi_escape_label((guint8*) name, strlen(name), &n, &l);
222 snprintf(n, l, ".%s%s", r->service_type, r->domain_name);
224 avahi_elapse_time(&tv, 1000, 0);
225 r->time_event = avahi_time_event_queue_add(server->time_event_queue, &tv, time_event_callback, r);
227 AVAHI_LLIST_PREPEND(AvahiServiceResolver, resolver, server->service_resolvers, r);
229 r->record_browser_a = r->record_browser_aaaa = r->record_browser_srv = r->record_browser_txt = NULL;
231 k = avahi_key_new(t, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_SRV);
232 r->record_browser_srv = avahi_record_browser_new(server, interface, protocol, k, record_browser_callback, r);
235 k = avahi_key_new(t, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_TXT);
236 r->record_browser_txt = avahi_record_browser_new(server, interface, protocol, k, record_browser_callback, r);
242 void avahi_service_resolver_free(AvahiServiceResolver *r) {
245 AVAHI_LLIST_REMOVE(AvahiServiceResolver, resolver, r->server->service_resolvers, r);
247 if (r->record_browser_srv)
248 avahi_record_browser_free(r->record_browser_srv);
249 if (r->record_browser_txt)
250 avahi_record_browser_free(r->record_browser_txt);
251 if (r->record_browser_a)
252 avahi_record_browser_free(r->record_browser_a);
253 if (r->record_browser_aaaa)
254 avahi_record_browser_free(r->record_browser_aaaa);
257 avahi_record_unref(r->srv_record);
259 avahi_record_unref(r->txt_record);
260 if (r->address_record)
261 avahi_record_unref(r->address_record);
263 g_free(r->service_name);
264 g_free(r->service_type);
265 g_free(r->domain_name);