1/* $Id$ */
2
3/***
4  This file is part of avahi.
5
6  avahi is free software; you can redistribute it and/or modify it
7  under the terms of the GNU Lesser General Public License as
8  published by the Free Software Foundation; either version 2.1 of the
9  License, or (at your option) any later version.
10
11  avahi is distributed in the hope that it will be useful, but WITHOUT
12  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13  or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
14  Public License for more details.
15
16  You should have received a copy of the GNU Lesser General Public
17  License along with avahi; if not, write to the Free Software
18  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
19  USA.
20***/
21
22#ifdef HAVE_CONFIG_H
23#include <config.h>
24#endif
25
26#include <stdlib.h>
27#include <stdio.h>
28#include <getopt.h>
29#include <assert.h>
30#include <string.h>
31#include <sys/types.h>
32#include <errno.h>
33#include <locale.h>
34
35#include <avahi-common/simple-watch.h>
36#include <avahi-common/error.h>
37#include <avahi-common/malloc.h>
38#include <avahi-common/alternative.h>
39#include <avahi-common/i18n.h>
40#include <avahi-client/client.h>
41#include <avahi-client/publish.h>
42
43#include "sigint.h"
44
45typedef enum {
46    COMMAND_UNSPEC,
47    COMMAND_HELP,
48    COMMAND_VERSION,
49    COMMAND_PUBLISH_SERVICE,
50    COMMAND_PUBLISH_ADDRESS
51} Command;
52
53typedef struct Config {
54    int verbose, no_fail;
55    Command command;
56    char *name, *stype, *domain, *host;
57    uint16_t port;
58    AvahiStringList *txt, *subtypes;
59    AvahiAddress address;
60} Config;
61
62static AvahiSimplePoll *simple_poll = NULL;
63static AvahiClient *client = NULL;
64static AvahiEntryGroup *entry_group = NULL;
65
66static int register_stuff(Config *config);
67
68static void entry_group_callback(AvahiEntryGroup *g, AvahiEntryGroupState state, void *userdata) {
69    Config *config = userdata;
70
71    assert(g);
72    assert(config);
73
74    switch (state) {
75
76        case AVAHI_ENTRY_GROUP_ESTABLISHED:
77
78            fprintf(stderr, _("Established under name '%s'\n"), config->name);
79            break;
80
81        case AVAHI_ENTRY_GROUP_FAILURE:
82
83            fprintf(stderr, _("Failed to register: %s\n"), avahi_strerror(avahi_client_errno(client)));
84            break;
85
86        case AVAHI_ENTRY_GROUP_COLLISION: {
87            char *n;
88
89            if (config->command == COMMAND_PUBLISH_SERVICE)
90                n = avahi_alternative_service_name(config->name);
91            else {
92                assert(config->command == COMMAND_PUBLISH_ADDRESS);
93                n = avahi_alternative_host_name(config->name);
94            }
95
96            fprintf(stderr, _("Name collision, picking new name '%s'.\n"), n);
97            avahi_free(config->name);
98            config->name = n;
99
100            register_stuff(config);
101
102            break;
103        }
104
105        case AVAHI_ENTRY_GROUP_UNCOMMITED:
106        case AVAHI_ENTRY_GROUP_REGISTERING:
107            ;
108    }
109}
110
111static int register_stuff(Config *config) {
112    assert(config);
113
114    if (!entry_group) {
115        if (!(entry_group = avahi_entry_group_new(client, entry_group_callback, config))) {
116            fprintf(stderr, _("Failed to create entry group: %s\n"), avahi_strerror(avahi_client_errno(client)));
117            return -1;
118        }
119    }
120
121    assert(avahi_entry_group_is_empty(entry_group));
122
123    if (config->command == COMMAND_PUBLISH_ADDRESS) {
124
125        if (avahi_entry_group_add_address(entry_group, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, 0, config->name, &config->address) < 0) {
126            fprintf(stderr, _("Failed to add address: %s\n"), avahi_strerror(avahi_client_errno(client)));
127            return -1;
128        }
129
130    } else {
131        AvahiStringList *i;
132
133        assert(config->command == COMMAND_PUBLISH_SERVICE);
134
135        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) {
136            fprintf(stderr, _("Failed to add service: %s\n"), avahi_strerror(avahi_client_errno(client)));
137            return -1;
138        }
139
140        for (i = config->subtypes; i; i = i->next)
141            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) {
142                fprintf(stderr, _("Failed to add subtype '%s': %s\n"), i->text, avahi_strerror(avahi_client_errno(client)));
143                return -1;
144            }
145    }
146
147    avahi_entry_group_commit(entry_group);
148
149    return 0;
150}
151
152static void client_callback(AvahiClient *c, AvahiClientState state, AVAHI_GCC_UNUSED void * userdata) {
153    Config *config = userdata;
154
155    client = c;
156
157    switch (state) {
158        case AVAHI_CLIENT_FAILURE:
159
160            if (config->no_fail && avahi_client_errno(c) == AVAHI_ERR_DISCONNECTED) {
161                int error;
162
163                /* We have been disconnected, so let reconnect */
164
165                fprintf(stderr, _("Disconnected, reconnecting ...\n"));
166
167                avahi_client_free(client);
168                client = NULL;
169                entry_group = NULL;
170
171                if (!(client = avahi_client_new(avahi_simple_poll_get(simple_poll), AVAHI_CLIENT_NO_FAIL, client_callback, config, &error))) {
172                    fprintf(stderr, _("Failed to create client object: %s\n"), avahi_strerror(error));
173                    avahi_simple_poll_quit(simple_poll);
174                }
175
176            } else {
177                fprintf(stderr, _("Client failure, exiting: %s\n"), avahi_strerror(avahi_client_errno(c)));
178                avahi_simple_poll_quit(simple_poll);
179            }
180
181            break;
182
183        case AVAHI_CLIENT_S_RUNNING:
184
185            if (register_stuff(config) < 0)
186                avahi_simple_poll_quit(simple_poll);
187
188            break;
189
190        case AVAHI_CLIENT_S_COLLISION:
191
192            if (config->verbose)
193                fprintf(stderr, _("Host name conflict\n"));
194
195            /* Fall through */
196
197        case AVAHI_CLIENT_S_REGISTERING:
198
199            if (entry_group) {
200                avahi_entry_group_free(entry_group);
201                entry_group = NULL;
202            }
203            break;
204
205        case AVAHI_CLIENT_CONNECTING:
206
207            if (config->verbose)
208                fprintf(stderr, _("Waiting for daemon ...\n"));
209
210            break;
211
212            ;
213    }
214}
215
216static void help(FILE *f, const char *argv0) {
217    fprintf(f,
218            _("%s [options] %s <name> <type> <port> [<txt ...>]\n"
219              "%s [options] %s <host-name> <address>\n\n"
220              "    -h --help            Show this help\n"
221              "    -V --version         Show version\n"
222              "    -s --service         Publish service\n"
223              "    -a --address         Publish address\n"
224              "    -v --verbose         Enable verbose mode\n"
225              "    -d --domain=DOMAIN   Domain to publish service in\n"
226              "    -H --host=DOMAIN     Host where service resides\n"
227              "       --subtype=SUBTYPE An additional subtype to register this service with\n"
228              "    -f --no-fail         Don't fail if the daemon is not available\n"),
229              argv0, strstr(argv0, "service") ? "[-s]" : "-s",
230              argv0, strstr(argv0, "address") ? "[-a]" : "-a");
231}
232
233static int parse_command_line(Config *c, const char *argv0, int argc, char *argv[]) {
234    int o;
235
236    enum {
237        ARG_SUBTYPE = 256
238    };
239
240    static const struct option long_options[] = {
241        { "help",           no_argument,       NULL, 'h' },
242        { "version",        no_argument,       NULL, 'V' },
243        { "service",        no_argument,       NULL, 's' },
244        { "address",        no_argument,       NULL, 'a' },
245        { "verbose",        no_argument,       NULL, 'v' },
246        { "domain",         required_argument, NULL, 'd' },
247        { "host",           required_argument, NULL, 'H' },
248        { "subtype",        required_argument, NULL, ARG_SUBTYPE},
249        { "no-fail",        no_argument,       NULL, 'f' },
250        { NULL, 0, NULL, 0 }
251    };
252
253    assert(c);
254
255    c->command = strstr(argv0, "address") ? COMMAND_PUBLISH_ADDRESS : (strstr(argv0, "service") ? COMMAND_PUBLISH_SERVICE : COMMAND_UNSPEC);
256    c->verbose = c->no_fail = 0;
257    c->host = c->name = c->domain = c->stype = NULL;
258    c->port = 0;
259    c->txt = c->subtypes = NULL;
260
261    while ((o = getopt_long(argc, argv, "hVsavd:H:f", long_options, NULL)) >= 0) {
262
263        switch(o) {
264            case 'h':
265                c->command = COMMAND_HELP;
266                break;
267            case 'V':
268                c->command = COMMAND_VERSION;
269                break;
270            case 's':
271                c->command = COMMAND_PUBLISH_SERVICE;
272                break;
273            case 'a':
274                c->command = COMMAND_PUBLISH_ADDRESS;
275                break;
276            case 'v':
277                c->verbose = 1;
278                break;
279            case 'd':
280                avahi_free(c->domain);
281                c->domain = avahi_strdup(optarg);
282                break;
283            case 'H':
284                avahi_free(c->host);
285                c->host = avahi_strdup(optarg);
286                break;
287            case 'f':
288                c->no_fail = 1;
289                break;
290            case ARG_SUBTYPE:
291                c->subtypes = avahi_string_list_add(c->subtypes, optarg);
292                break;
293            default:
294                return -1;
295        }
296    }
297
298    if (c->command == COMMAND_PUBLISH_ADDRESS) {
299        if (optind+2 !=  argc) {
300            fprintf(stderr, _("Bad number of arguments\n"));
301            return -1;
302        }
303
304        avahi_free(c->name);
305        c->name = avahi_strdup(argv[optind]);
306        avahi_address_parse(argv[optind+1], AVAHI_PROTO_UNSPEC, &c->address);
307
308    } else if (c->command == COMMAND_PUBLISH_SERVICE) {
309
310        char *e;
311        long int p;
312        int i;
313
314        if (optind+3 > argc) {
315            fprintf(stderr, _("Bad number of arguments\n"));
316            return -1;
317        }
318
319        c->name = avahi_strdup(argv[optind]);
320        c->stype = avahi_strdup(argv[optind+1]);
321
322        errno = 0;
323        p = strtol(argv[optind+2], &e, 0);
324
325        if (errno != 0 || *e || p < 0 || p > 0xFFFF) {
326            fprintf(stderr, _("Failed to parse port number: %s\n"), argv[optind+2]);
327            return -1;
328        }
329
330        c->port = p;
331
332        for (i = optind+3; i < argc; i++)
333            c->txt = avahi_string_list_add(c->txt, argv[i]);
334    }
335
336    return 0;
337}
338
339int main(int argc, char *argv[]) {
340    int ret = 1, error;
341    Config config;
342    const char *argv0;
343
344    avahi_init_i18n();
345    setlocale(LC_ALL, "");
346
347    if ((argv0 = strrchr(argv[0], '/')))
348        argv0++;
349    else
350        argv0 = argv[0];
351
352    if (parse_command_line(&config, argv0, argc, argv) < 0)
353        goto fail;
354
355    switch (config.command) {
356        case COMMAND_UNSPEC:
357            ret = 1;
358            fprintf(stderr, _("No command specified.\n"));
359            break;
360
361        case COMMAND_HELP:
362            help(stdout, argv0);
363            ret = 0;
364            break;
365
366        case COMMAND_VERSION:
367            printf("%s "PACKAGE_VERSION"\n", argv0);
368            ret = 0;
369            break;
370
371        case COMMAND_PUBLISH_SERVICE:
372        case COMMAND_PUBLISH_ADDRESS:
373
374            if (!(simple_poll = avahi_simple_poll_new())) {
375                fprintf(stderr, _("Failed to create simple poll object.\n"));
376                goto fail;
377            }
378
379            if (sigint_install(simple_poll) < 0)
380                goto fail;
381
382            if (!(client = avahi_client_new(avahi_simple_poll_get(simple_poll), config.no_fail ? AVAHI_CLIENT_NO_FAIL : 0, client_callback, &config, &error))) {
383                fprintf(stderr, _("Failed to create client object: %s\n"), avahi_strerror(error));
384                goto fail;
385            }
386
387            if (avahi_client_get_state(client) != AVAHI_CLIENT_CONNECTING && config.verbose) {
388                const char *version, *hn;
389
390                if (!(version = avahi_client_get_version_string(client))) {
391                    fprintf(stderr, _("Failed to query version string: %s\n"), avahi_strerror(avahi_client_errno(client)));
392                    goto fail;
393                }
394
395                if (!(hn = avahi_client_get_host_name_fqdn(client))) {
396                    fprintf(stderr, _("Failed to query host name: %s\n"), avahi_strerror(avahi_client_errno(client)));
397                    goto fail;
398                }
399
400                fprintf(stderr, _("Server version: %s; Host name: %s\n"), version, hn);
401            }
402
403            avahi_simple_poll_loop(simple_poll);
404            ret = 0;
405            break;
406    }
407
408fail:
409
410    if (client)
411        avahi_client_free(client);
412
413    sigint_uninstall();
414
415    if (simple_poll)
416        avahi_simple_poll_free(simple_poll);
417
418    avahi_free(config.host);
419    avahi_free(config.name);
420    avahi_free(config.stype);
421    avahi_free(config.domain);
422    avahi_string_list_free(config.subtypes);
423    avahi_string_list_free(config.txt);
424
425    return ret;
426}
427