/***
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 <stdlib.h>
#include <stdio.h>
#include <getopt.h>
#include <assert.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <net/if.h>
#include <locale.h>
#include <avahi-common/simple-watch.h>
#include <avahi-common/error.h>
#include "avahi-common/avahi-malloc.h"
#include <avahi-common/domain.h>
#include <avahi-common/llist.h>
#include <avahi-common/i18n.h>
#include <avahi-client/client.h>
#include <avahi-client/lookup.h>
#include "sigint.h"
typedef enum {
COMMAND_UNSPEC,
COMMAND_HELP,
COMMAND_VERSION,
COMMAND_RESOLVE_HOST_NAME,
COMMAND_RESOLVE_ADDRESS
} Command;
typedef struct Config {
int verbose;
Command command;
AvahiProtocol proto;
} Config;
static AvahiSimplePoll *simple_poll = NULL;
static AvahiClient *client = NULL;
static int n_resolving = 0;
static void host_name_resolver_callback(
AvahiHostNameResolver *r,
AVAHI_GCC_UNUSED AvahiIfIndex interface,
AVAHI_GCC_UNUSED AvahiProtocol protocol,
AvahiResolverEvent event,
const char *name,
const AvahiAddress *a,
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
AVAHI_GCC_UNUSED void *userdata) {
assert(r);
switch (event) {
case AVAHI_RESOLVER_FOUND: {
char address[AVAHI_ADDRESS_STR_MAX];
avahi_address_snprint(address, sizeof(address), a);
printf("%s\t%s\n", name, address);
break;
}
case AVAHI_RESOLVER_FAILURE:
fprintf(stderr, _("Failed to resolve host name '%s': %s\n"), name, avahi_strerror(avahi_client_errno(client)));
break;
}
avahi_host_name_resolver_free(r);
assert(n_resolving > 0);
n_resolving--;
if (n_resolving <= 0)
avahi_simple_poll_quit(simple_poll);
}
static void address_resolver_callback(
AvahiAddressResolver *r,
AVAHI_GCC_UNUSED AvahiIfIndex interface,
AVAHI_GCC_UNUSED AvahiProtocol protocol,
AvahiResolverEvent event,
const AvahiAddress *a,
const char *name,
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
AVAHI_GCC_UNUSED void *userdata) {
char address[AVAHI_ADDRESS_STR_MAX];
assert(r);
avahi_address_snprint(address, sizeof(address), a);
switch (event) {
case AVAHI_RESOLVER_FOUND:
printf("%s\t%s\n", address, name);
break;
case AVAHI_RESOLVER_FAILURE:
fprintf(stderr, _("Failed to resolve address '%s': %s\n"), address, avahi_strerror(avahi_client_errno(client)));
break;
}
avahi_address_resolver_free(r);
assert(n_resolving > 0);
n_resolving--;
if (n_resolving <= 0)
avahi_simple_poll_quit(simple_poll);
}
static void client_callback(AvahiClient *c, AvahiClientState state, AVAHI_GCC_UNUSED void * userdata) {
switch (state) {
case AVAHI_CLIENT_FAILURE:
fprintf(stderr, _("Client failure, exiting: %s\n"), avahi_strerror(avahi_client_errno(c)));
avahi_simple_poll_quit(simple_poll);
break;
case AVAHI_CLIENT_S_REGISTERING:
case AVAHI_CLIENT_S_RUNNING:
case AVAHI_CLIENT_S_COLLISION:
case AVAHI_CLIENT_CONNECTING:
;
}
}
static void help(FILE *f, const char *argv0) {
fprintf(f,
_("%s [options] %s <host name ...>\n"
"%s [options] %s <address ... >\n\n"
" -h --help Show this help\n"
" -V --version Show version\n"
" -n --name Resolve host name\n"
" -a --address Resolve address\n"
" -v --verbose Enable verbose mode\n"
" -6 Lookup IPv6 address\n"
" -4 Lookup IPv4 address\n"),
argv0, strstr(argv0, "host-name") ? "[-n]" : "-n",
argv0, strstr(argv0, "address") ? "[-a]" : "-a");
}
static int parse_command_line(Config *c, const char *argv0, int argc, char *argv[]) {
int o;
static const struct option long_options[] = {
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, 'V' },
{ "name", no_argument, NULL, 'n' },
{ "address", no_argument, NULL, 'a' },
{ "verbose", no_argument, NULL, 'v' },
{ NULL, 0, NULL, 0 }
};
assert(c);
c->command = strstr(argv0, "address") ? COMMAND_RESOLVE_ADDRESS : (strstr(argv0, "host-name") ? COMMAND_RESOLVE_HOST_NAME : COMMAND_UNSPEC);
c->proto = AVAHI_PROTO_UNSPEC;
c->verbose = 0;
while ((o = getopt_long(argc, argv, "hVnav46", long_options, NULL)) >= 0) {
switch(o) {
case 'h':
c->command = COMMAND_HELP;
break;
case 'V':
c->command = COMMAND_VERSION;
break;
case 'n':
c->command = COMMAND_RESOLVE_HOST_NAME;
break;
case 'a':
c->command = COMMAND_RESOLVE_ADDRESS;
break;
case 'v':
c->verbose = 1;
break;
case '4':
c->proto = AVAHI_PROTO_INET;
break;
case '6':
c->proto = AVAHI_PROTO_INET6;
break;
default:
return -1;
}
}
if (c->command == COMMAND_RESOLVE_ADDRESS || c->command == COMMAND_RESOLVE_HOST_NAME) {
if (optind >= argc) {
fprintf(stderr, _("Too few arguments\n"));
return -1;
}
}
return 0;
}
int main(int argc, char *argv[]) {
int ret = 1, error;
Config config;
const char *argv0;
avahi_init_i18n();
setlocale(LC_ALL, "");
if ((argv0 = strrchr(argv[0], '/')))
argv0++;
else
argv0 = argv[0];
if (parse_command_line(&config, argv0, argc, argv) < 0)
goto fail;
switch (config.command) {
case COMMAND_UNSPEC:
ret = 1;
fprintf(stderr, _("No command specified.\n"));
break;
case COMMAND_HELP:
help(stdout, argv0);
ret = 0;
break;
case COMMAND_VERSION:
printf("%s "PACKAGE_VERSION"\n", argv0);
ret = 0;
break;
case COMMAND_RESOLVE_HOST_NAME:
case COMMAND_RESOLVE_ADDRESS: {
int i;
if (!(simple_poll = avahi_simple_poll_new())) {
fprintf(stderr, _("Failed to create simple poll object.\n"));
goto fail;
}
if (sigint_install(simple_poll) < 0)
goto fail;
if (!(client = avahi_client_new(avahi_simple_poll_get(simple_poll), 0, client_callback, NULL, &error))) {
fprintf(stderr, _("Failed to create client object: %s\n"), avahi_strerror(error));
goto fail;
}
if (config.verbose) {
const char *version, *hn;
if (!(version = avahi_client_get_version_string(client))) {
fprintf(stderr, _("Failed to query version string: %s\n"), avahi_strerror(avahi_client_errno(client)));
goto fail;
}
if (!(hn = avahi_client_get_host_name_fqdn(client))) {
fprintf(stderr, _("Failed to query host name: %s\n"), avahi_strerror(avahi_client_errno(client)));
goto fail;
}
fprintf(stderr, _("Server version: %s; Host name: %s\n"), version, hn);
}
n_resolving = 0;
for (i = optind; i < argc; i++) {
if (config.command == COMMAND_RESOLVE_HOST_NAME) {
if (!(avahi_host_name_resolver_new(client, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, argv[i], config.proto, 0, host_name_resolver_callback, NULL))) {
fprintf(stderr, _("Failed to create host name resolver: %s\n"), avahi_strerror(avahi_client_errno(client)));
goto fail;
}
} else {
AvahiAddress a;
assert(config.command == COMMAND_RESOLVE_ADDRESS);
if (!avahi_address_parse(argv[i], AVAHI_PROTO_UNSPEC, &a)) {
fprintf(stderr, _("Failed to parse address '%s'\n"), argv[i]);
goto fail;
}
if (!(avahi_address_resolver_new(client, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, &a, 0, address_resolver_callback, NULL))) {
fprintf(stderr, _("Failed to create address resolver: %s\n"), avahi_strerror(avahi_client_errno(client)));
goto fail;
}
}
n_resolving++;
}
avahi_simple_poll_loop(simple_poll);
ret = 0;
break;
}
}
fail:
if (client)
avahi_client_free(client);
sigint_uninstall();
if (simple_poll)
avahi_simple_poll_free(simple_poll);
return ret;
}