1/* $Id$ */ 2 3/*** 4 This file is part of avahi. 5 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. 10 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. 15 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. 20***/ 21 22#ifdef HAVE_CONFIG_H 23#include <config.h> 24#endif 25 26#include <string.h> 27 28#include <avahi-common/domain.h> 29#include <avahi-common/malloc.h> 30#include <avahi-common/error.h> 31 32#include "browse.h" 33#include "log.h" 34 35struct AvahiSServiceTypeBrowser { 36 AvahiServer *server; 37 char *domain_name; 38 39 AvahiSRecordBrowser *record_browser; 40 41 AvahiSServiceTypeBrowserCallback callback; 42 void* userdata; 43 44 AVAHI_LLIST_FIELDS(AvahiSServiceTypeBrowser, browser); 45}; 46 47static void record_browser_callback( 48 AvahiSRecordBrowser*rr, 49 AvahiIfIndex interface, 50 AvahiProtocol protocol, 51 AvahiBrowserEvent event, 52 AvahiRecord *record, 53 AvahiLookupResultFlags flags, 54 void* userdata) { 55 56 AvahiSServiceTypeBrowser *b = userdata; 57 58 assert(rr); 59 assert(b); 60 61 /* Filter flags */ 62 flags &= AVAHI_LOOKUP_RESULT_CACHED | AVAHI_LOOKUP_RESULT_MULTICAST | AVAHI_LOOKUP_RESULT_WIDE_AREA; 63 64 if (record) { 65 char type[AVAHI_DOMAIN_NAME_MAX], domain[AVAHI_DOMAIN_NAME_MAX]; 66 67 assert(record->key->type == AVAHI_DNS_TYPE_PTR); 68 69 if (avahi_service_name_split(record->data.ptr.name, NULL, 0, type, sizeof(type), domain, sizeof(domain)) < 0) { 70 avahi_log_warn("Invalid service type '%s'", record->key->name); 71 return; 72 } 73 74 b->callback(b, interface, protocol, event, type, domain, flags, b->userdata); 75 } else 76 b->callback(b, interface, protocol, event, NULL, b->domain_name, flags, b->userdata); 77} 78 79AvahiSServiceTypeBrowser *avahi_s_service_type_browser_new( 80 AvahiServer *server, 81 AvahiIfIndex interface, 82 AvahiProtocol protocol, 83 const char *domain, 84 AvahiLookupFlags flags, 85 AvahiSServiceTypeBrowserCallback callback, 86 void* userdata) { 87 88 AvahiSServiceTypeBrowser *b; 89 AvahiKey *k = NULL; 90 char n[AVAHI_DOMAIN_NAME_MAX]; 91 int r; 92 93 assert(server); 94 assert(callback); 95 96 AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE); 97 AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL); 98 AVAHI_CHECK_VALIDITY_RETURN_NULL(server, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME); 99 AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_FLAGS_VALID(flags, AVAHI_LOOKUP_USE_WIDE_AREA|AVAHI_LOOKUP_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS); 100 101 if (!domain) 102 domain = server->domain_name; 103 104 if ((r = avahi_service_name_join(n, sizeof(n), NULL, "_services._dns-sd._udp", domain)) < 0) { 105 avahi_server_set_errno(server, r); 106 return NULL; 107 } 108 109 if (!(b = avahi_new(AvahiSServiceTypeBrowser, 1))) { 110 avahi_server_set_errno(server, AVAHI_ERR_NO_MEMORY); 111 return NULL; 112 } 113 114 b->server = server; 115 b->callback = callback; 116 b->userdata = userdata; 117 b->record_browser = NULL; 118 119 AVAHI_LLIST_PREPEND(AvahiSServiceTypeBrowser, browser, server->service_type_browsers, b); 120 121 if (!(b->domain_name = avahi_normalize_name_strdup(domain))) { 122 avahi_server_set_errno(server, AVAHI_ERR_NO_MEMORY); 123 goto fail; 124 } 125 126 if (!(k = avahi_key_new(n, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_PTR))) { 127 avahi_server_set_errno(server, AVAHI_ERR_NO_MEMORY); 128 goto fail; 129 } 130 131 if (!(b->record_browser = avahi_s_record_browser_new(server, interface, protocol, k, flags, record_browser_callback, b))) 132 goto fail; 133 134 avahi_key_unref(k); 135 136 return b; 137 138fail: 139 if (k) 140 avahi_key_unref(k); 141 142 avahi_s_service_type_browser_free(b); 143 144 return NULL; 145} 146 147void avahi_s_service_type_browser_free(AvahiSServiceTypeBrowser *b) { 148 assert(b); 149 150 AVAHI_LLIST_REMOVE(AvahiSServiceTypeBrowser, browser, b->server->service_type_browsers, b); 151 152 if (b->record_browser) 153 avahi_s_record_browser_free(b->record_browser); 154 155 avahi_free(b->domain_name); 156 avahi_free(b); 157} 158 159 160