429 lines
13 KiB
C
429 lines
13 KiB
C
/***
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This file is part of avahi.
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avahi is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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avahi is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
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Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with avahi; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdlib.h>
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#include <stdio.h>
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#include <getopt.h>
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#include <assert.h>
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#include <string.h>
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#include <sys/types.h>
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#include <errno.h>
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#include <locale.h>
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#include <avahi-common/simple-watch.h>
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#include <avahi-common/error.h>
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#include "avahi-common/avahi-malloc.h"
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#include <avahi-common/alternative.h>
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#include <avahi-common/i18n.h>
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#include <avahi-client/client.h>
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#include <avahi-client/publish.h>
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#include "sigint.h"
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typedef enum {
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COMMAND_UNSPEC,
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COMMAND_HELP,
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COMMAND_VERSION,
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COMMAND_PUBLISH_SERVICE,
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COMMAND_PUBLISH_ADDRESS
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} Command;
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typedef struct Config {
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int verbose, no_fail, no_reverse;
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Command command;
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char *name, *stype, *domain, *host;
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uint16_t port;
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AvahiStringList *txt, *subtypes;
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AvahiAddress address;
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} Config;
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static AvahiSimplePoll *simple_poll = NULL;
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static AvahiClient *client = NULL;
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static AvahiEntryGroup *entry_group = NULL;
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static int register_stuff(Config *config);
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static void entry_group_callback(AvahiEntryGroup *g, AvahiEntryGroupState state, void *userdata) {
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Config *config = userdata;
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assert(g);
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assert(config);
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switch (state) {
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case AVAHI_ENTRY_GROUP_ESTABLISHED:
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fprintf(stderr, _("Established under name '%s'\n"), config->name);
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break;
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case AVAHI_ENTRY_GROUP_FAILURE:
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fprintf(stderr, _("Failed to register: %s\n"), avahi_strerror(avahi_client_errno(client)));
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break;
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case AVAHI_ENTRY_GROUP_COLLISION: {
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char *n;
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if (config->command == COMMAND_PUBLISH_SERVICE)
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n = avahi_alternative_service_name(config->name);
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else {
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assert(config->command == COMMAND_PUBLISH_ADDRESS);
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n = avahi_alternative_host_name(config->name);
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}
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fprintf(stderr, _("Name collision, picking new name '%s'.\n"), n);
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avahi_free(config->name);
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config->name = n;
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register_stuff(config);
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break;
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}
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case AVAHI_ENTRY_GROUP_UNCOMMITED:
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case AVAHI_ENTRY_GROUP_REGISTERING:
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;
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}
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}
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static int register_stuff(Config *config) {
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assert(config);
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if (!entry_group) {
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if (!(entry_group = avahi_entry_group_new(client, entry_group_callback, config))) {
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fprintf(stderr, _("Failed to create entry group: %s\n"), avahi_strerror(avahi_client_errno(client)));
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return -1;
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}
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}
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assert(avahi_entry_group_is_empty(entry_group));
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if (config->command == COMMAND_PUBLISH_ADDRESS) {
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if (avahi_entry_group_add_address(entry_group, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, config->no_reverse ? AVAHI_PUBLISH_NO_REVERSE : 0, config->name, &config->address) < 0) {
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fprintf(stderr, _("Failed to add address: %s\n"), avahi_strerror(avahi_client_errno(client)));
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return -1;
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}
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} else {
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AvahiStringList *i;
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assert(config->command == COMMAND_PUBLISH_SERVICE);
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if (avahi_entry_group_add_service_strlst(entry_group, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, 0, config->name, config->stype, config->domain, config->host, config->port, config->txt) < 0) {
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fprintf(stderr, _("Failed to add service: %s\n"), avahi_strerror(avahi_client_errno(client)));
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return -1;
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}
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for (i = config->subtypes; i; i = i->next)
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if (avahi_entry_group_add_service_subtype(entry_group, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, 0, config->name, config->stype, config->domain, (char*) i->text) < 0) {
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fprintf(stderr, _("Failed to add subtype '%s': %s\n"), i->text, avahi_strerror(avahi_client_errno(client)));
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return -1;
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}
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}
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avahi_entry_group_commit(entry_group);
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return 0;
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}
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static void client_callback(AvahiClient *c, AvahiClientState state, AVAHI_GCC_UNUSED void * userdata) {
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Config *config = userdata;
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client = c;
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switch (state) {
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case AVAHI_CLIENT_FAILURE:
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if (config->no_fail && avahi_client_errno(c) == AVAHI_ERR_DISCONNECTED) {
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int error;
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/* We have been disconnected, so let reconnect */
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fprintf(stderr, _("Disconnected, reconnecting ...\n"));
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avahi_client_free(client);
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client = NULL;
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entry_group = NULL;
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if (!(client = avahi_client_new(avahi_simple_poll_get(simple_poll), AVAHI_CLIENT_NO_FAIL, client_callback, config, &error))) {
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fprintf(stderr, _("Failed to create client object: %s\n"), avahi_strerror(error));
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avahi_simple_poll_quit(simple_poll);
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}
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} else {
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fprintf(stderr, _("Client failure, exiting: %s\n"), avahi_strerror(avahi_client_errno(c)));
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avahi_simple_poll_quit(simple_poll);
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}
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break;
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case AVAHI_CLIENT_S_RUNNING:
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if (register_stuff(config) < 0)
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avahi_simple_poll_quit(simple_poll);
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break;
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case AVAHI_CLIENT_S_COLLISION:
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if (config->verbose)
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fprintf(stderr, _("Host name conflict\n"));
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/* Fall through */
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case AVAHI_CLIENT_S_REGISTERING:
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if (entry_group) {
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avahi_entry_group_free(entry_group);
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entry_group = NULL;
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}
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break;
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case AVAHI_CLIENT_CONNECTING:
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if (config->verbose)
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fprintf(stderr, _("Waiting for daemon ...\n"));
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break;
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;
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}
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}
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static void help(FILE *f, const char *argv0) {
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fprintf(f,
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_("%s [options] %s <name> <type> <port> [<txt ...>]\n"
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"%s [options] %s <host-name> <address>\n\n"
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" -h --help Show this help\n"
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" -V --version Show version\n"
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" -s --service Publish service\n"
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" -a --address Publish address\n"
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" -v --verbose Enable verbose mode\n"
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" -d --domain=DOMAIN Domain to publish service in\n"
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" -H --host=DOMAIN Host where service resides\n"
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" --subtype=SUBTYPE An additional subtype to register this service with\n"
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" -R --no-reverse Do not publish reverse entry with address\n"
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" -f --no-fail Don't fail if the daemon is not available\n"),
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argv0, strstr(argv0, "service") ? "[-s]" : "-s",
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argv0, strstr(argv0, "address") ? "[-a]" : "-a");
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}
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static int parse_command_line(Config *c, const char *argv0, int argc, char *argv[]) {
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int o;
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enum {
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ARG_SUBTYPE = 256
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};
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static const struct option long_options[] = {
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{ "help", no_argument, NULL, 'h' },
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{ "version", no_argument, NULL, 'V' },
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{ "service", no_argument, NULL, 's' },
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{ "address", no_argument, NULL, 'a' },
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{ "verbose", no_argument, NULL, 'v' },
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{ "domain", required_argument, NULL, 'd' },
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{ "host", required_argument, NULL, 'H' },
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{ "subtype", required_argument, NULL, ARG_SUBTYPE},
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{ "no-reverse", no_argument, NULL, 'R' },
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{ "no-fail", no_argument, NULL, 'f' },
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{ NULL, 0, NULL, 0 }
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};
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assert(c);
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c->command = strstr(argv0, "address") ? COMMAND_PUBLISH_ADDRESS : (strstr(argv0, "service") ? COMMAND_PUBLISH_SERVICE : COMMAND_UNSPEC);
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c->verbose = c->no_fail = c->no_reverse = 0;
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c->host = c->name = c->domain = c->stype = NULL;
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c->port = 0;
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c->txt = c->subtypes = NULL;
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while ((o = getopt_long(argc, argv, "hVsavRd:H:f", long_options, NULL)) >= 0) {
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switch(o) {
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case 'h':
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c->command = COMMAND_HELP;
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break;
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case 'V':
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c->command = COMMAND_VERSION;
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break;
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case 's':
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c->command = COMMAND_PUBLISH_SERVICE;
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break;
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case 'a':
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c->command = COMMAND_PUBLISH_ADDRESS;
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break;
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case 'v':
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c->verbose = 1;
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break;
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case 'R':
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c->no_reverse = 1;
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break;
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case 'd':
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avahi_free(c->domain);
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c->domain = avahi_strdup(optarg);
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break;
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case 'H':
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avahi_free(c->host);
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c->host = avahi_strdup(optarg);
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break;
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case 'f':
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c->no_fail = 1;
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break;
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case ARG_SUBTYPE:
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c->subtypes = avahi_string_list_add(c->subtypes, optarg);
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break;
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default:
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return -1;
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}
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}
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if (c->command == COMMAND_PUBLISH_ADDRESS) {
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if (optind+2 != argc) {
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fprintf(stderr, _("Bad number of arguments\n"));
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return -1;
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}
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avahi_free(c->name);
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c->name = avahi_strdup(argv[optind]);
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avahi_address_parse(argv[optind+1], AVAHI_PROTO_UNSPEC, &c->address);
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} else if (c->command == COMMAND_PUBLISH_SERVICE) {
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char *e;
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long int p;
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int i;
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if (optind+3 > argc) {
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fprintf(stderr, _("Bad number of arguments\n"));
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return -1;
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}
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c->name = avahi_strdup(argv[optind]);
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c->stype = avahi_strdup(argv[optind+1]);
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errno = 0;
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p = strtol(argv[optind+2], &e, 0);
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if (errno != 0 || *e || p < 0 || p > 0xFFFF) {
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fprintf(stderr, _("Failed to parse port number: %s\n"), argv[optind+2]);
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return -1;
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}
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c->port = p;
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for (i = optind+3; i < argc; i++)
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c->txt = avahi_string_list_add(c->txt, argv[i]);
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}
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return 0;
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}
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int main(int argc, char *argv[]) {
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int ret = 1, error;
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Config config;
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const char *argv0;
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avahi_init_i18n();
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setlocale(LC_ALL, "");
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if ((argv0 = strrchr(argv[0], '/')))
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argv0++;
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else
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argv0 = argv[0];
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if (parse_command_line(&config, argv0, argc, argv) < 0)
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goto fail;
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switch (config.command) {
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case COMMAND_UNSPEC:
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ret = 1;
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fprintf(stderr, _("No command specified.\n"));
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break;
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case COMMAND_HELP:
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help(stdout, argv0);
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ret = 0;
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break;
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case COMMAND_VERSION:
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printf("%s "PACKAGE_VERSION"\n", argv0);
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ret = 0;
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break;
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case COMMAND_PUBLISH_SERVICE:
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case COMMAND_PUBLISH_ADDRESS:
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if (!(simple_poll = avahi_simple_poll_new())) {
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fprintf(stderr, _("Failed to create simple poll object.\n"));
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goto fail;
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}
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if (sigint_install(simple_poll) < 0)
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goto fail;
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if (!(client = avahi_client_new(avahi_simple_poll_get(simple_poll), config.no_fail ? AVAHI_CLIENT_NO_FAIL : 0, client_callback, &config, &error))) {
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fprintf(stderr, _("Failed to create client object: %s\n"), avahi_strerror(error));
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goto fail;
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}
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if (avahi_client_get_state(client) != AVAHI_CLIENT_CONNECTING && config.verbose) {
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const char *version, *hn;
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if (!(version = avahi_client_get_version_string(client))) {
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fprintf(stderr, _("Failed to query version string: %s\n"), avahi_strerror(avahi_client_errno(client)));
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goto fail;
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}
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if (!(hn = avahi_client_get_host_name_fqdn(client))) {
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fprintf(stderr, _("Failed to query host name: %s\n"), avahi_strerror(avahi_client_errno(client)));
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goto fail;
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}
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fprintf(stderr, _("Server version: %s; Host name: %s\n"), version, hn);
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}
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avahi_simple_poll_loop(simple_poll);
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ret = 0;
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break;
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}
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fail:
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if (client)
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avahi_client_free(client);
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sigint_uninstall();
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if (simple_poll)
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avahi_simple_poll_free(simple_poll);
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avahi_free(config.host);
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avahi_free(config.name);
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avahi_free(config.stype);
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avahi_free(config.domain);
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avahi_string_list_free(config.subtypes);
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avahi_string_list_free(config.txt);
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return ret;
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}
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