From 66c497f4637276f390f1a7afaf7fe07616da9f1a Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Sat, 20 Aug 2005 22:57:33 +0000 Subject: * Disable debug output of avahi-client * implement service resolving API in avahi-client * fix some memory corruption bugs in dbus-watch-glue * add avahi-client examples git-svn-id: file:///home/lennart/svn/public/avahi/trunk@363 941a03a8-eaeb-0310-b9a0-b1bbd8fe43fe --- examples/client-browse-services.c | 164 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 164 insertions(+) create mode 100644 examples/client-browse-services.c (limited to 'examples/client-browse-services.c') diff --git a/examples/client-browse-services.c b/examples/client-browse-services.c new file mode 100644 index 0000000..80fa934 --- /dev/null +++ b/examples/client-browse-services.c @@ -0,0 +1,164 @@ +/* $Id$ */ + +/*** + 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 +#endif + +#include +#include +#include +#include + +#include +#include +#include +#include + +static AvahiSimplePoll *simple_poll = NULL; + +static void resolve_callback( + AvahiServiceResolver *r, + AvahiIfIndex interface, + AvahiProtocol protocol, + AvahiResolverEvent event, + const char *name, + const char *type, + const char *domain, + const char *host_name, + const AvahiAddress *address, + uint16_t port, + AvahiStringList *txt, + void* userdata) { + + assert(r); + + /* Called whenever a service has been resolved successfully or timed out */ + + if (event == AVAHI_RESOLVER_TIMEOUT) + fprintf(stderr, "Failed to resolve service '%s' of type '%s' in domain '%s'.\n", name, type, domain); + else { + char a[128], *t; + + assert(event == AVAHI_RESOLVER_FOUND); + + fprintf(stderr, "Service '%s' of type '%s' in domain '%s':\n", name, type, domain); + + avahi_address_snprint(a, sizeof(a), address); + t = avahi_string_list_to_string(txt); + fprintf(stderr, "\t%s:%u (%s) TXT=%s\n", host_name, port, a, t); + avahi_free(t); + } + + avahi_service_resolver_free(r); +} + +static void browse_callback( + AvahiServiceBrowser *b, + AvahiIfIndex interface, + AvahiProtocol protocol, + AvahiBrowserEvent event, + const char *name, + const char *type, + const char *domain, + void* userdata) { + + AvahiClient *c = userdata; + assert(b); + + /* Called whenever a new services becomes available on the LAN or is removed from the LAN */ + + fprintf(stderr, "%s: service '%s' of type '%s' in domain '%s'\n", + event == AVAHI_BROWSER_NEW ? "NEW" : "REMOVED", + name, + type, + domain); + + /* If it's new, let's resolve it */ + if (event == AVAHI_BROWSER_NEW) + + /* We ignore the returned resolver object. In the callback function + we free it. If the server is terminated before the callback + function is called the server will free the resolver for us. */ + + if (!(avahi_service_resolver_new(c, interface, protocol, name, type, domain, AVAHI_PROTO_UNSPEC, resolve_callback, c))) + fprintf(stderr, "Failed to resolve service '%s': %s\n", name, avahi_strerror(avahi_client_errno(c))); +} + +static void client_callback(AvahiClient *c, AvahiClientState state, void * userdata) { + assert(c); + + /* Called whenever the client or server state changes */ + + if (state == AVAHI_CLIENT_DISCONNECTED) { + fprintf(stderr, "Server connection terminated.\n"); + avahi_simple_poll_quit(simple_poll); + } +} + +int main(int argc, char*argv[]) { + AvahiClient *client = NULL; + AvahiServiceBrowser *sb; + int error; + int ret = 1; + + /* Allocate main loop object */ + if (!(simple_poll = avahi_simple_poll_new())) { + fprintf(stderr, "Failed to create simple poll object.\n"); + goto fail; + } + + /* Allocate a new client */ + client = avahi_client_new(avahi_simple_poll_get(simple_poll), client_callback, NULL, &error); + + /* Check wether creating the client object succeeded */ + if (!client) { + fprintf(stderr, "Failed to create client: %s\n", avahi_strerror(error)); + goto fail; + } + + /* Create the service browser */ + if (!(sb = avahi_service_browser_new(client, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, "_http._tcp", NULL, browse_callback, client))) { + fprintf(stderr, "Failed to create service browser: %s\n", avahi_strerror(avahi_client_errno(client))); + goto fail; + } + + /* Run the main loop */ + for (;;) + if (avahi_simple_poll_iterate(simple_poll, -1) != 0) + break; + + ret = 0; + +fail: + + /* Cleanup things */ + if (sb) + avahi_service_browser_free(sb); + + if (client) + avahi_client_free(client); + + if (simple_poll) + avahi_simple_poll_free(simple_poll); + + return ret; +} -- cgit