| /*** |
| 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 <config.h> |
| #endif |
| |
| #include <string.h> |
| |
| #include <avahi-common/domain.h> |
| #include "avahi-common/avahi-malloc.h" |
| #include <avahi-common/error.h> |
| |
| #include "browse.h" |
| #include "log.h" |
| |
| struct AvahiSServiceBrowser { |
| AvahiServer *server; |
| char *domain_name; |
| char *service_type; |
| |
| AvahiSRecordBrowser *record_browser; |
| |
| AvahiSServiceBrowserCallback callback; |
| void* userdata; |
| |
| AVAHI_LLIST_FIELDS(AvahiSServiceBrowser, browser); |
| }; |
| |
| static void record_browser_callback( |
| AvahiSRecordBrowser*rr, |
| AvahiIfIndex interface, |
| AvahiProtocol protocol, |
| AvahiBrowserEvent event, |
| AvahiRecord *record, |
| AvahiLookupResultFlags flags, |
| void* userdata) { |
| |
| AvahiSServiceBrowser *b = userdata; |
| |
| assert(rr); |
| assert(b); |
| |
| /* Filter flags */ |
| flags &= AVAHI_LOOKUP_RESULT_CACHED | AVAHI_LOOKUP_RESULT_MULTICAST | AVAHI_LOOKUP_RESULT_WIDE_AREA; |
| |
| if (record) { |
| char service[AVAHI_LABEL_MAX], type[AVAHI_DOMAIN_NAME_MAX], domain[AVAHI_DOMAIN_NAME_MAX]; |
| |
| assert(record->key->type == AVAHI_DNS_TYPE_PTR); |
| |
| if (event == AVAHI_BROWSER_NEW && avahi_server_is_service_local(b->server, interface, protocol, record->data.ptr.name)) |
| flags |= AVAHI_LOOKUP_RESULT_LOCAL; |
| |
| if (avahi_service_name_split(record->data.ptr.name, service, sizeof(service), type, sizeof(type), domain, sizeof(domain)) < 0) { |
| avahi_log_warn("Failed to split '%s'", record->key->name); |
| return; |
| } |
| |
| b->callback(b, interface, protocol, event, service, type, domain, flags, b->userdata); |
| |
| } else |
| b->callback(b, interface, protocol, event, NULL, b->service_type, b->domain_name, flags, b->userdata); |
| |
| } |
| |
| AvahiSServiceBrowser *avahi_s_service_browser_new( |
| AvahiServer *server, |
| AvahiIfIndex interface, |
| AvahiProtocol protocol, |
| const char *service_type, |
| const char *domain, |
| AvahiLookupFlags flags, |
| AvahiSServiceBrowserCallback callback, |
| void* userdata) { |
| |
| AvahiSServiceBrowser *b; |
| AvahiKey *k = NULL; |
| char n[AVAHI_DOMAIN_NAME_MAX]; |
| int r; |
| |
| assert(server); |
| assert(callback); |
| assert(service_type); |
| |
| AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE); |
| AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL); |
| AVAHI_CHECK_VALIDITY_RETURN_NULL(server, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME); |
| AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_FLAGS_VALID(flags, AVAHI_LOOKUP_USE_WIDE_AREA|AVAHI_LOOKUP_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS); |
| AVAHI_CHECK_VALIDITY_RETURN_NULL(server, avahi_is_valid_service_type_generic(service_type), AVAHI_ERR_INVALID_SERVICE_TYPE); |
| |
| if (!domain) |
| domain = server->domain_name; |
| |
| if ((r = avahi_service_name_join(n, sizeof(n), NULL, service_type, domain)) < 0) { |
| avahi_server_set_errno(server, r); |
| return NULL; |
| } |
| |
| if (!(b = avahi_new(AvahiSServiceBrowser, 1))) { |
| avahi_server_set_errno(server, AVAHI_ERR_NO_MEMORY); |
| return NULL; |
| } |
| |
| b->server = server; |
| b->domain_name = b->service_type = NULL; |
| b->callback = callback; |
| b->userdata = userdata; |
| b->record_browser = NULL; |
| |
| AVAHI_LLIST_PREPEND(AvahiSServiceBrowser, browser, server->service_browsers, b); |
| |
| if (!(b->domain_name = avahi_normalize_name_strdup(domain)) || |
| !(b->service_type = avahi_normalize_name_strdup(service_type))) { |
| avahi_server_set_errno(server, AVAHI_ERR_NO_MEMORY); |
| goto fail; |
| } |
| |
| if (!(k = avahi_key_new(n, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_PTR))) { |
| avahi_server_set_errno(server, AVAHI_ERR_NO_MEMORY); |
| goto fail; |
| } |
| |
| if (!(b->record_browser = avahi_s_record_browser_new(server, interface, protocol, k, flags, record_browser_callback, b))) |
| goto fail; |
| |
| avahi_key_unref(k); |
| |
| return b; |
| |
| fail: |
| |
| if (k) |
| avahi_key_unref(k); |
| |
| avahi_s_service_browser_free(b); |
| return NULL; |
| } |
| |
| void avahi_s_service_browser_free(AvahiSServiceBrowser *b) { |
| assert(b); |
| |
| AVAHI_LLIST_REMOVE(AvahiSServiceBrowser, browser, b->server->service_browsers, b); |
| |
| if (b->record_browser) |
| avahi_s_record_browser_free(b->record_browser); |
| |
| avahi_free(b->domain_name); |
| avahi_free(b->service_type); |
| avahi_free(b); |
| } |