]> git.meshlink.io Git - catta/blob - avahi-core/browse-service.c
forgot to pull the publish_no_reverse change to the example.
[catta] / avahi-core / browse-service.c
1 /***
2   This file is part of avahi.
3
4   avahi is free software; you can redistribute it and/or modify it
5   under the terms of the GNU Lesser General Public License as
6   published by the Free Software Foundation; either version 2.1 of the
7   License, or (at your option) any later version.
8
9   avahi is distributed in the hope that it will be useful, but WITHOUT
10   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11   or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
12   Public License for more details.
13
14   You should have received a copy of the GNU Lesser General Public
15   License along with avahi; if not, write to the Free Software
16   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
17   USA.
18 ***/
19
20 #ifdef HAVE_CONFIG_H
21 #include <config.h>
22 #endif
23
24 #include <string.h>
25
26 #include <avahi-common/domain.h>
27 #include <avahi-common/malloc.h>
28 #include <avahi-common/error.h>
29
30 #include "browse.h"
31 #include "log.h"
32
33 struct AvahiSServiceBrowser {
34     AvahiServer *server;
35     char *domain_name;
36     char *service_type;
37
38     AvahiSRecordBrowser *record_browser;
39
40     AvahiSServiceBrowserCallback callback;
41     void* userdata;
42
43     AVAHI_LLIST_FIELDS(AvahiSServiceBrowser, browser);
44 };
45
46 static void record_browser_callback(
47     AvahiSRecordBrowser*rr,
48     AvahiIfIndex interface,
49     AvahiProtocol protocol,
50     AvahiBrowserEvent event,
51     AvahiRecord *record,
52     AvahiLookupResultFlags flags,
53     void* userdata) {
54
55     AvahiSServiceBrowser *b = userdata;
56
57     assert(rr);
58     assert(b);
59
60     /* Filter flags */
61     flags &= AVAHI_LOOKUP_RESULT_CACHED | AVAHI_LOOKUP_RESULT_MULTICAST | AVAHI_LOOKUP_RESULT_WIDE_AREA;
62
63     if (record) {
64         char service[AVAHI_LABEL_MAX], type[AVAHI_DOMAIN_NAME_MAX], domain[AVAHI_DOMAIN_NAME_MAX];
65
66         assert(record->key->type == AVAHI_DNS_TYPE_PTR);
67
68         if (event == AVAHI_BROWSER_NEW && avahi_server_is_service_local(b->server, interface, protocol, record->data.ptr.name))
69             flags |= AVAHI_LOOKUP_RESULT_LOCAL;
70
71         if (avahi_service_name_split(record->data.ptr.name, service, sizeof(service), type, sizeof(type), domain, sizeof(domain)) < 0) {
72             avahi_log_warn("Failed to split '%s'", record->key->name);
73             return;
74         }
75
76         b->callback(b, interface, protocol, event, service, type, domain, flags, b->userdata);
77
78     } else
79         b->callback(b, interface, protocol, event, NULL, b->service_type, b->domain_name, flags, b->userdata);
80
81 }
82
83 AvahiSServiceBrowser *avahi_s_service_browser_new(
84     AvahiServer *server,
85     AvahiIfIndex interface,
86     AvahiProtocol protocol,
87     const char *service_type,
88     const char *domain,
89     AvahiLookupFlags flags,
90     AvahiSServiceBrowserCallback callback,
91     void* userdata) {
92
93     AvahiSServiceBrowser *b;
94     AvahiKey *k = NULL;
95     char n[AVAHI_DOMAIN_NAME_MAX];
96     int r;
97
98     assert(server);
99     assert(callback);
100     assert(service_type);
101
102     AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
103     AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL);
104     AVAHI_CHECK_VALIDITY_RETURN_NULL(server, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME);
105     AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_FLAGS_VALID(flags, AVAHI_LOOKUP_USE_WIDE_AREA|AVAHI_LOOKUP_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS);
106     AVAHI_CHECK_VALIDITY_RETURN_NULL(server, avahi_is_valid_service_type_generic(service_type), AVAHI_ERR_INVALID_SERVICE_TYPE);
107
108     if (!domain)
109         domain = server->domain_name;
110
111     if ((r = avahi_service_name_join(n, sizeof(n), NULL, service_type, domain)) < 0) {
112         avahi_server_set_errno(server, r);
113         return NULL;
114     }
115
116     if (!(b = avahi_new(AvahiSServiceBrowser, 1))) {
117         avahi_server_set_errno(server, AVAHI_ERR_NO_MEMORY);
118         return NULL;
119     }
120
121     b->server = server;
122     b->domain_name = b->service_type = NULL;
123     b->callback = callback;
124     b->userdata = userdata;
125     b->record_browser = NULL;
126
127     AVAHI_LLIST_PREPEND(AvahiSServiceBrowser, browser, server->service_browsers, b);
128
129     if (!(b->domain_name = avahi_normalize_name_strdup(domain)) ||
130         !(b->service_type = avahi_normalize_name_strdup(service_type))) {
131         avahi_server_set_errno(server, AVAHI_ERR_NO_MEMORY);
132         goto fail;
133     }
134
135     if (!(k = avahi_key_new(n, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_PTR))) {
136         avahi_server_set_errno(server, AVAHI_ERR_NO_MEMORY);
137         goto fail;
138     }
139
140     if (!(b->record_browser = avahi_s_record_browser_new(server, interface, protocol, k, flags, record_browser_callback, b)))
141         goto fail;
142
143     avahi_key_unref(k);
144
145     return b;
146
147 fail:
148
149     if (k)
150         avahi_key_unref(k);
151
152     avahi_s_service_browser_free(b);
153     return NULL;
154 }
155
156 void avahi_s_service_browser_free(AvahiSServiceBrowser *b) {
157     assert(b);
158
159     AVAHI_LLIST_REMOVE(AvahiSServiceBrowser, browser, b->server->service_browsers, b);
160
161     if (b->record_browser)
162         avahi_s_record_browser_free(b->record_browser);
163
164     avahi_free(b->domain_name);
165     avahi_free(b->service_type);
166     avahi_free(b);
167 }