Lines Matching defs:*
0 /* $Id$ */
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
19 USA.
22 #ifdef HAVE_CONFIG_H
23 #include <config.h>
24 #endif
26 #include <stdlib.h>
28 #include <avahi-common/domain.h>
29 #include <avahi-common/malloc.h>
30 #include <avahi-common/error.h>
32 #include "browse.h"
33 #include "log.h"
35 struct AvahiSDomainBrowser {
36 int ref;
38 AvahiServer *server;
40 AvahiSRecordBrowser *record_browser;
42 AvahiDomainBrowserType type;
43 AvahiSDomainBrowserCallback callback;
44 void* userdata;
46 AvahiTimeEvent *defer_event;
48 int all_for_now_scheduled;
50 AVAHI_LLIST_FIELDS(AvahiSDomainBrowser, browser);
53 static void inc_ref(AvahiSDomainBrowser *b) {
54 assert(b);
55 assert(b->ref >= 1);
57 b->ref++;
60 static void record_browser_callback(
61 AvahiSRecordBrowser*rr,
62 AvahiIfIndex interface,
63 AvahiProtocol protocol,
64 AvahiBrowserEvent event,
65 AvahiRecord *record,
66 AvahiLookupResultFlags flags,
67 void* userdata) {
69 AvahiSDomainBrowser *b = userdata;
70 char *n = NULL;
72 assert(rr);
73 assert(b);
75 if (event == AVAHI_BROWSER_ALL_FOR_NOW &&
76 b->defer_event) {
78 b->all_for_now_scheduled = 1;
79 return;
82 /* Filter flags */
83 flags &= AVAHI_LOOKUP_RESULT_CACHED | AVAHI_LOOKUP_RESULT_MULTICAST | AVAHI_LOOKUP_RESULT_WIDE_AREA;
85 if (record) {
86 assert(record->key->type == AVAHI_DNS_TYPE_PTR);
87 n = record->data.ptr.name;
89 if (b->type == AVAHI_DOMAIN_BROWSER_BROWSE) {
90 AvahiStringList *l;
92 /* Filter out entries defined statically */
94 for (l = b->server->config.browse_domains; l; l = l->next)
95 if (avahi_domain_equal((char*) l->text, n))
96 return;
101 b->callback(b, interface, protocol, event, n, flags, b->userdata);
104 static void defer_callback(AvahiTimeEvent *e, void *userdata) {
105 AvahiSDomainBrowser *b = userdata;
106 AvahiStringList *l;
108 assert(e);
109 assert(b);
111 assert(b->type == AVAHI_DOMAIN_BROWSER_BROWSE);
113 avahi_time_event_free(b->defer_event);
114 b->defer_event = NULL;
116 /* Increase ref counter */
117 inc_ref(b);
119 for (l = b->server->config.browse_domains; l; l = l->next) {
121 /* Check whether this object still exists outside our own
122 * stack frame */
123 if (b->ref <= 1)
124 break;
126 b->callback(b, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, AVAHI_BROWSER_NEW, (char*) l->text, AVAHI_LOOKUP_RESULT_STATIC, b->userdata);
129 if (b->ref > 1) {
130 /* If the ALL_FOR_NOW event has already been scheduled, execute it now */
132 if (b->all_for_now_scheduled)
133 b->callback(b, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, AVAHI_BROWSER_ALL_FOR_NOW, NULL, 0, b->userdata);
136 /* Decrease ref counter */
137 avahi_s_domain_browser_free(b);
140 AvahiSDomainBrowser *avahi_s_domain_browser_new(
141 AvahiServer *server,
142 AvahiIfIndex interface,
143 AvahiProtocol protocol,
144 const char *domain,
145 AvahiDomainBrowserType type,
146 AvahiLookupFlags flags,
147 AvahiSDomainBrowserCallback callback,
148 void* userdata) {
150 static const char * const type_table[AVAHI_DOMAIN_BROWSER_MAX] = {
151 "b",
152 "db",
153 "r",
154 "dr",
155 "lb"
158 AvahiSDomainBrowser *b;
159 AvahiKey *k = NULL;
160 char n[AVAHI_DOMAIN_NAME_MAX];
161 int r;
163 assert(server);
164 assert(callback);
166 AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
167 AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL);
168 AVAHI_CHECK_VALIDITY_RETURN_NULL(server, type < AVAHI_DOMAIN_BROWSER_MAX, AVAHI_ERR_INVALID_FLAGS);
169 AVAHI_CHECK_VALIDITY_RETURN_NULL(server, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME);
170 AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_FLAGS_VALID(flags, AVAHI_LOOKUP_USE_WIDE_AREA|AVAHI_LOOKUP_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS);
172 if (!domain)
173 domain = server->domain_name;
175 if ((r = avahi_service_name_join(n, sizeof(n), type_table[type], "_dns-sd._udp", domain)) < 0) {
176 avahi_server_set_errno(server, r);
177 return NULL;
180 if (!(b = avahi_new(AvahiSDomainBrowser, 1))) {
181 avahi_server_set_errno(server, AVAHI_ERR_NO_MEMORY);
182 return NULL;
185 b->ref = 1;
186 b->server = server;
187 b->callback = callback;
188 b->userdata = userdata;
189 b->record_browser = NULL;
190 b->type = type;
191 b->all_for_now_scheduled = 0;
192 b->defer_event = NULL;
194 AVAHI_LLIST_PREPEND(AvahiSDomainBrowser, browser, server->domain_browsers, b);
196 if (!(k = avahi_key_new(n, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_PTR))) {
197 avahi_server_set_errno(server, AVAHI_ERR_NO_MEMORY);
198 goto fail;
201 if (!(b->record_browser = avahi_s_record_browser_new(server, interface, protocol, k, flags, record_browser_callback, b)))
202 goto fail;
204 avahi_key_unref(k);
206 if (type == AVAHI_DOMAIN_BROWSER_BROWSE && b->server->config.browse_domains)
207 b->defer_event = avahi_time_event_new(server->time_event_queue, NULL, defer_callback, b);
209 return b;
211 fail:
213 if (k)
214 avahi_key_unref(k);
216 avahi_s_domain_browser_free(b);
218 return NULL;
221 void avahi_s_domain_browser_free(AvahiSDomainBrowser *b) {
222 assert(b);
224 assert(b->ref >= 1);
225 if (--b->ref > 0)
226 return;
228 AVAHI_LLIST_REMOVE(AvahiSDomainBrowser, browser, b->server->domain_browsers, b);
230 if (b->record_browser)
231 avahi_s_record_browser_free(b->record_browser);
233 if (b->defer_event)
234 avahi_time_event_free(b->defer_event);
236 avahi_free(b);