339 lines
9.7 KiB
C
339 lines
9.7 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 <sys/socket.h>
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#include <net/if.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/domain.h>
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#include <avahi-common/llist.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/lookup.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_RESOLVE_HOST_NAME,
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COMMAND_RESOLVE_ADDRESS
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} Command;
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typedef struct Config {
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int verbose;
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Command command;
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AvahiProtocol proto;
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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 int n_resolving = 0;
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static void host_name_resolver_callback(
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AvahiHostNameResolver *r,
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AVAHI_GCC_UNUSED AvahiIfIndex interface,
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AVAHI_GCC_UNUSED AvahiProtocol protocol,
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AvahiResolverEvent event,
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const char *name,
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const AvahiAddress *a,
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AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
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AVAHI_GCC_UNUSED void *userdata) {
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assert(r);
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switch (event) {
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case AVAHI_RESOLVER_FOUND: {
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char address[AVAHI_ADDRESS_STR_MAX];
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avahi_address_snprint(address, sizeof(address), a);
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printf("%s\t%s\n", name, address);
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break;
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}
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case AVAHI_RESOLVER_FAILURE:
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fprintf(stderr, _("Failed to resolve host name '%s': %s\n"), name, avahi_strerror(avahi_client_errno(client)));
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break;
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}
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avahi_host_name_resolver_free(r);
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assert(n_resolving > 0);
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n_resolving--;
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if (n_resolving <= 0)
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avahi_simple_poll_quit(simple_poll);
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}
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static void address_resolver_callback(
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AvahiAddressResolver *r,
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AVAHI_GCC_UNUSED AvahiIfIndex interface,
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AVAHI_GCC_UNUSED AvahiProtocol protocol,
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AvahiResolverEvent event,
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const AvahiAddress *a,
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const char *name,
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AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
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AVAHI_GCC_UNUSED void *userdata) {
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char address[AVAHI_ADDRESS_STR_MAX];
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assert(r);
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avahi_address_snprint(address, sizeof(address), a);
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switch (event) {
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case AVAHI_RESOLVER_FOUND:
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printf("%s\t%s\n", address, name);
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break;
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case AVAHI_RESOLVER_FAILURE:
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fprintf(stderr, _("Failed to resolve address '%s': %s\n"), address, avahi_strerror(avahi_client_errno(client)));
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break;
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}
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avahi_address_resolver_free(r);
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assert(n_resolving > 0);
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n_resolving--;
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if (n_resolving <= 0)
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avahi_simple_poll_quit(simple_poll);
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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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switch (state) {
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case AVAHI_CLIENT_FAILURE:
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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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break;
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case AVAHI_CLIENT_S_REGISTERING:
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case AVAHI_CLIENT_S_RUNNING:
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case AVAHI_CLIENT_S_COLLISION:
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case AVAHI_CLIENT_CONNECTING:
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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 <host name ...>\n"
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"%s [options] %s <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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" -n --name Resolve host name\n"
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" -a --address Resolve address\n"
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" -v --verbose Enable verbose mode\n"
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" -6 Lookup IPv6 address\n"
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" -4 Lookup IPv4 address\n"),
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argv0, strstr(argv0, "host-name") ? "[-n]" : "-n",
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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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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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{ "name", no_argument, NULL, 'n' },
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{ "address", no_argument, NULL, 'a' },
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{ "verbose", no_argument, NULL, 'v' },
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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_RESOLVE_ADDRESS : (strstr(argv0, "host-name") ? COMMAND_RESOLVE_HOST_NAME : COMMAND_UNSPEC);
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c->proto = AVAHI_PROTO_UNSPEC;
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c->verbose = 0;
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while ((o = getopt_long(argc, argv, "hVnav46", 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 'n':
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c->command = COMMAND_RESOLVE_HOST_NAME;
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break;
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case 'a':
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c->command = COMMAND_RESOLVE_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 '4':
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c->proto = AVAHI_PROTO_INET;
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break;
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case '6':
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c->proto = AVAHI_PROTO_INET6;
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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_RESOLVE_ADDRESS || c->command == COMMAND_RESOLVE_HOST_NAME) {
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if (optind >= argc) {
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fprintf(stderr, _("Too few arguments\n"));
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return -1;
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}
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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_RESOLVE_HOST_NAME:
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case COMMAND_RESOLVE_ADDRESS: {
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int i;
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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), 0, client_callback, NULL, &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 (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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n_resolving = 0;
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for (i = optind; i < argc; i++) {
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if (config.command == COMMAND_RESOLVE_HOST_NAME) {
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if (!(avahi_host_name_resolver_new(client, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, argv[i], config.proto, 0, host_name_resolver_callback, NULL))) {
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fprintf(stderr, _("Failed to create host name resolver: %s\n"), avahi_strerror(avahi_client_errno(client)));
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goto fail;
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}
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} else {
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AvahiAddress a;
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assert(config.command == COMMAND_RESOLVE_ADDRESS);
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if (!avahi_address_parse(argv[i], AVAHI_PROTO_UNSPEC, &a)) {
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fprintf(stderr, _("Failed to parse address '%s'\n"), argv[i]);
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goto fail;
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}
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if (!(avahi_address_resolver_new(client, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, &a, 0, address_resolver_callback, NULL))) {
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fprintf(stderr, _("Failed to create address resolver: %s\n"), avahi_strerror(avahi_client_errno(client)));
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goto fail;
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}
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}
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n_resolving++;
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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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}
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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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return ret;
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}
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