| /*** |
| 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 <time.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <assert.h> |
| |
| #include <avahi-core/core.h> |
| #include <avahi-core/publish.h> |
| #include <avahi-common/simple-watch.h> |
| #include <avahi-common/malloc.h> |
| #include <avahi-common/alternative.h> |
| #include <avahi-common/error.h> |
| |
| static AvahiSEntryGroup *group = NULL; |
| static AvahiSimplePoll *simple_poll = NULL; |
| static char *name = NULL; |
| |
| static void create_services(AvahiServer *s); |
| |
| static void entry_group_callback(AvahiServer *s, AvahiSEntryGroup *g, AvahiEntryGroupState state, AVAHI_GCC_UNUSED void *userdata) { |
| assert(s); |
| assert(g == group); |
| |
| /* Called whenever the entry group state changes */ |
| |
| switch (state) { |
| |
| case AVAHI_ENTRY_GROUP_ESTABLISHED: |
| |
| /* The entry group has been established successfully */ |
| fprintf(stderr, "Service '%s' successfully established.\n", name); |
| break; |
| |
| case AVAHI_ENTRY_GROUP_COLLISION: { |
| char *n; |
| |
| /* A service name collision happened. Let's pick a new name */ |
| n = avahi_alternative_service_name(name); |
| avahi_free(name); |
| name = n; |
| |
| fprintf(stderr, "Service name collision, renaming service to '%s'\n", name); |
| |
| /* And recreate the services */ |
| create_services(s); |
| break; |
| } |
| |
| case AVAHI_ENTRY_GROUP_FAILURE : |
| |
| fprintf(stderr, "Entry group failure: %s\n", avahi_strerror(avahi_server_errno(s))); |
| |
| /* Some kind of failure happened while we were registering our services */ |
| avahi_simple_poll_quit(simple_poll); |
| break; |
| |
| case AVAHI_ENTRY_GROUP_UNCOMMITED: |
| case AVAHI_ENTRY_GROUP_REGISTERING: |
| ; |
| } |
| } |
| |
| static void create_services(AvahiServer *s) { |
| char r[128]; |
| int ret; |
| assert(s); |
| |
| /* If this is the first time we're called, let's create a new entry group */ |
| if (!group) |
| if (!(group = avahi_s_entry_group_new(s, entry_group_callback, NULL))) { |
| fprintf(stderr, "avahi_entry_group_new() failed: %s\n", avahi_strerror(avahi_server_errno(s))); |
| goto fail; |
| } |
| |
| fprintf(stderr, "Adding service '%s'\n", name); |
| |
| /* Create some random TXT data */ |
| snprintf(r, sizeof(r), "random=%i", rand()); |
| |
| /* Add the service for IPP */ |
| if ((ret = avahi_server_add_service(s, group, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, 0, name, "_ipp._tcp", NULL, NULL, 651, "test=blah", r, NULL)) < 0) { |
| fprintf(stderr, "Failed to add _ipp._tcp service: %s\n", avahi_strerror(ret)); |
| goto fail; |
| } |
| |
| /* Add the same service for BSD LPR */ |
| if ((ret = avahi_server_add_service(s, group, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, 0, name, "_printer._tcp", NULL, NULL, 515, NULL)) < 0) { |
| fprintf(stderr, "Failed to add _printer._tcp service: %s\n", avahi_strerror(ret)); |
| goto fail; |
| } |
| |
| /* Add an additional (hypothetic) subtype */ |
| if ((ret = avahi_server_add_service_subtype(s, group, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, 0, name, "_printer._tcp", NULL, "_magic._sub._printer._tcp") < 0)) { |
| fprintf(stderr, "Failed to add subtype _magic._sub._printer._tcp: %s\n", avahi_strerror(ret)); |
| goto fail; |
| } |
| |
| /* Tell the server to register the service */ |
| if ((ret = avahi_s_entry_group_commit(group)) < 0) { |
| fprintf(stderr, "Failed to commit entry_group: %s\n", avahi_strerror(ret)); |
| goto fail; |
| } |
| |
| return; |
| |
| fail: |
| avahi_simple_poll_quit(simple_poll); |
| } |
| |
| static void server_callback(AvahiServer *s, AvahiServerState state, AVAHI_GCC_UNUSED void * userdata) { |
| assert(s); |
| |
| /* Called whenever the server state changes */ |
| |
| switch (state) { |
| |
| case AVAHI_SERVER_RUNNING: |
| /* The serve has startup successfully and registered its host |
| * name on the network, so it's time to create our services */ |
| |
| if (!group) |
| create_services(s); |
| |
| break; |
| |
| case AVAHI_SERVER_COLLISION: { |
| char *n; |
| int r; |
| |
| /* A host name collision happened. Let's pick a new name for the server */ |
| n = avahi_alternative_host_name(avahi_server_get_host_name(s)); |
| fprintf(stderr, "Host name collision, retrying with '%s'\n", n); |
| r = avahi_server_set_host_name(s, n); |
| avahi_free(n); |
| |
| if (r < 0) { |
| fprintf(stderr, "Failed to set new host name: %s\n", avahi_strerror(r)); |
| |
| avahi_simple_poll_quit(simple_poll); |
| return; |
| } |
| |
| } |
| |
| /* Fall through */ |
| |
| case AVAHI_SERVER_REGISTERING: |
| |
| /* Let's drop our registered services. When the server is back |
| * in AVAHI_SERVER_RUNNING state we will register them |
| * again with the new host name. */ |
| if (group) |
| avahi_s_entry_group_reset(group); |
| |
| break; |
| |
| case AVAHI_SERVER_FAILURE: |
| |
| /* Terminate on failure */ |
| |
| fprintf(stderr, "Server failure: %s\n", avahi_strerror(avahi_server_errno(s))); |
| avahi_simple_poll_quit(simple_poll); |
| break; |
| |
| case AVAHI_SERVER_INVALID: |
| ; |
| } |
| } |
| |
| int main(AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char*argv[]) { |
| AvahiServerConfig config; |
| AvahiServer *server = NULL; |
| int error; |
| int ret = 1; |
| |
| /* Initialize the pseudo-RNG */ |
| srand(time(NULL)); |
| |
| /* Allocate main loop object */ |
| if (!(simple_poll = avahi_simple_poll_new())) { |
| fprintf(stderr, "Failed to create simple poll object.\n"); |
| goto fail; |
| } |
| |
| name = avahi_strdup("MegaPrinter"); |
| |
| /* Let's set the host name for this server. */ |
| avahi_server_config_init(&config); |
| config.host_name = avahi_strdup("gurkiman"); |
| config.publish_workstation = 0; |
| |
| /* Allocate a new server */ |
| server = avahi_server_new(avahi_simple_poll_get(simple_poll), &config, server_callback, NULL, &error); |
| |
| /* Free the configuration data */ |
| avahi_server_config_free(&config); |
| |
| /* Check wether creating the server object succeeded */ |
| if (!server) { |
| fprintf(stderr, "Failed to create server: %s\n", avahi_strerror(error)); |
| goto fail; |
| } |
| |
| /* Run the main loop */ |
| avahi_simple_poll_loop(simple_poll); |
| |
| ret = 0; |
| |
| fail: |
| |
| /* Cleanup things */ |
| |
| if (server) |
| avahi_server_free(server); |
| |
| if (simple_poll) |
| avahi_simple_poll_free(simple_poll); |
| |
| avahi_free(name); |
| |
| return ret; |
| } |