4 This file is part of avahi.
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.
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.
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
33 #include <netinet/in.h>
35 #include <avahi-common/simple-watch.h>
36 #include <avahi-common/malloc.h>
37 #include <avahi-common/error.h>
38 #include <avahi-common/domain.h>
39 #include <avahi-client/client.h>
50 struct _DNSServiceRef_t {
51 AvahiSimplePoll *simple_poll;
53 int thread_fd, main_fd;
58 pthread_mutex_t mutex;
61 DNSServiceBrowseReply service_browser_callback;
62 DNSServiceResolveReply service_resolver_callback;
65 AvahiServiceBrowser *service_browser;
66 AvahiServiceResolver *service_resolver;
69 #define ASSERT_SUCCESS(r) { int __ret = (r); assert(__ret == 0); }
71 static int read_command(int fd) {
77 if ((r = read(fd, &command, 1)) != 1) {
78 fprintf(stderr, __FILE__": read() failed: %s\n", r < 0 ? strerror(errno) : "EOF");
85 static int write_command(int fd, char reply) {
88 if (write(fd, &reply, 1) != 1) {
89 fprintf(stderr, __FILE__": write() failed: %s\n", strerror(errno));
96 static int poll_func(struct pollfd *ufds, unsigned int nfds, int timeout, void *userdata) {
97 DNSServiceRef sdref = userdata;
102 ASSERT_SUCCESS(pthread_mutex_unlock(&sdref->mutex));
104 /* fprintf(stderr, "pre-syscall\n"); */
105 ret = poll(ufds, nfds, timeout);
106 /* fprintf(stderr, "post-syscall\n"); */
108 ASSERT_SUCCESS(pthread_mutex_lock(&sdref->mutex));
113 static void * thread_func(void *data) {
114 DNSServiceRef sdref = data;
118 pthread_sigmask(SIG_BLOCK, &mask, NULL);
120 sdref->thread = pthread_self();
121 sdref->thread_running = 1;
126 if ((command = read_command(sdref->thread_fd)) < 0)
129 /* fprintf(stderr, "Command: %c\n", command); */
135 ASSERT_SUCCESS(pthread_mutex_lock(&sdref->mutex));
138 if (avahi_simple_poll_run(sdref->simple_poll) < 0) {
139 fprintf(stderr, __FILE__": avahi_simple_poll_run() failed.\n");
140 ASSERT_SUCCESS(pthread_mutex_unlock(&sdref->mutex));
144 if (write_command(sdref->thread_fd, COMMAND_POLLED) < 0) {
145 ASSERT_SUCCESS(pthread_mutex_unlock(&sdref->mutex));
149 ASSERT_SUCCESS(pthread_mutex_unlock(&sdref->mutex));
162 static DNSServiceRef sdref_new(void) {
163 int fd[2] = { -1, -1 };
164 DNSServiceRef sdref = NULL;
165 pthread_mutexattr_t mutex_attr;
167 if (socketpair(AF_UNIX, SOCK_STREAM, 0, fd) < 0)
170 if (!(sdref = avahi_new(struct _DNSServiceRef_t, 1)))
173 sdref->thread_fd = fd[0];
174 sdref->main_fd = fd[1];
176 sdref->client = NULL;
177 sdref->service_browser = NULL;
178 sdref->service_resolver = NULL;
180 ASSERT_SUCCESS(pthread_mutexattr_init(&mutex_attr));
181 pthread_mutexattr_settype(&mutex_attr, PTHREAD_MUTEX_RECURSIVE);
182 ASSERT_SUCCESS(pthread_mutex_init(&sdref->mutex, NULL));
184 sdref->thread_running = 0;
186 if (!(sdref->simple_poll = avahi_simple_poll_new()))
189 avahi_simple_poll_set_func(sdref->simple_poll, poll_func, sdref);
191 /* Start simple poll */
192 if (avahi_simple_poll_prepare(sdref->simple_poll, -1) < 0)
195 /* Queue a initiall POLL command for the thread */
196 if (write_command(sdref->main_fd, COMMAND_POLL) < 0)
199 if (pthread_create(&sdref->thread, NULL, thread_func, sdref) != 0)
202 sdref->thread_running = 1;
209 DNSServiceRefDeallocate(sdref);
214 int DNSSD_API DNSServiceRefSockFD(DNSServiceRef sdRef) {
219 return sdRef->main_fd;
222 DNSServiceErrorType DNSSD_API DNSServiceProcessResult(DNSServiceRef sdref) {
223 DNSServiceErrorType ret = kDNSServiceErr_Unknown;
227 ASSERT_SUCCESS(pthread_mutex_lock(&sdref->mutex));
229 /* Cleanup notification socket */
230 if (read_command(sdref->main_fd) != COMMAND_POLLED)
233 if (avahi_simple_poll_dispatch(sdref->simple_poll) < 0)
236 if (avahi_simple_poll_prepare(sdref->simple_poll, -1) < 0)
239 /* Request the poll */
240 if (write_command(sdref->main_fd, COMMAND_POLL) < 0)
243 ret = kDNSServiceErr_NoError;
247 ASSERT_SUCCESS(pthread_mutex_unlock(&sdref->mutex));
252 void DNSSD_API DNSServiceRefDeallocate(DNSServiceRef sdref) {
257 if (sdref->thread_running) {
258 write_command(sdref->main_fd, COMMAND_QUIT);
259 avahi_simple_poll_wakeup(sdref->simple_poll);
260 pthread_join(sdref->thread, NULL);
264 avahi_client_free(sdref->client);
266 if (sdref->thread_fd >= 0)
267 close(sdref->thread_fd);
269 if (sdref->main_fd >= 0)
270 close(sdref->main_fd);
272 if (sdref->simple_poll)
273 avahi_simple_poll_free(sdref->simple_poll);
275 pthread_mutex_destroy(&sdref->mutex);
280 static DNSServiceErrorType map_error(int error) {
283 return kDNSServiceErr_NoError;
285 case AVAHI_ERR_BAD_STATE :
286 return kDNSServiceErr_BadState;
288 case AVAHI_ERR_INVALID_HOST_NAME:
289 case AVAHI_ERR_INVALID_DOMAIN_NAME:
290 case AVAHI_ERR_INVALID_TTL:
291 case AVAHI_ERR_IS_PATTERN:
292 case AVAHI_ERR_INVALID_RECORD:
293 case AVAHI_ERR_INVALID_SERVICE_NAME:
294 case AVAHI_ERR_INVALID_SERVICE_TYPE:
295 case AVAHI_ERR_INVALID_PORT:
296 case AVAHI_ERR_INVALID_KEY:
297 case AVAHI_ERR_INVALID_ADDRESS:
298 return kDNSServiceErr_BadParam;
301 case AVAHI_ERR_LOCAL_COLLISION:
302 return kDNSServiceErr_NameConflict;
304 case AVAHI_ERR_TOO_MANY_CLIENTS:
305 case AVAHI_ERR_TOO_MANY_OBJECTS:
306 case AVAHI_ERR_TOO_MANY_ENTRIES:
307 case AVAHI_ERR_ACCESS_DENIED:
308 return kDNSServiceErr_Refused;
310 case AVAHI_ERR_INVALID_OPERATION:
311 case AVAHI_ERR_INVALID_OBJECT:
312 return kDNSServiceErr_Invalid;
314 case AVAHI_ERR_NO_MEMORY:
315 return kDNSServiceErr_NoMemory;
317 case AVAHI_ERR_INVALID_INTERFACE:
318 case AVAHI_ERR_INVALID_PROTOCOL:
319 return kDNSServiceErr_BadInterfaceIndex;
321 case AVAHI_ERR_INVALID_FLAGS:
322 return kDNSServiceErr_BadFlags;
324 case AVAHI_ERR_NOT_FOUND:
325 return kDNSServiceErr_NoSuchName;
327 case AVAHI_ERR_VERSION_MISMATCH:
328 return kDNSServiceErr_Incompatible;
330 case AVAHI_ERR_NO_NETWORK:
332 case AVAHI_ERR_INVALID_CONFIG:
333 case AVAHI_ERR_TIMEOUT:
334 case AVAHI_ERR_DBUS_ERROR:
335 case AVAHI_ERR_NOT_CONNECTED:
336 case AVAHI_ERR_NO_DAEMON:
341 return kDNSServiceErr_Unknown;
344 static void service_browser_callback(
345 AvahiServiceBrowser *b,
346 AvahiIfIndex interface,
347 AvahiProtocol protocol,
348 AvahiBrowserEvent event,
352 AvahiLookupResultFlags flags,
355 DNSServiceRef sdref = userdata;
361 case AVAHI_BROWSER_NEW:
362 sdref->service_browser_callback(sdref, kDNSServiceFlagsAdd, interface, kDNSServiceErr_NoError, name, type, domain, sdref->context);
365 case AVAHI_BROWSER_REMOVE:
366 sdref->service_browser_callback(sdref, 0, interface, kDNSServiceErr_NoError, name, type, domain, sdref->context);
369 case AVAHI_BROWSER_FAILURE:
370 sdref->service_browser_callback(sdref, 0, interface, kDNSServiceErr_Unknown, name, type, domain, sdref->context);
373 case AVAHI_BROWSER_NOT_FOUND:
374 sdref->service_browser_callback(sdref, 0, interface, kDNSServiceErr_NoSuchName, name, type, domain, sdref->context);
377 case AVAHI_BROWSER_CACHE_EXHAUSTED:
378 case AVAHI_BROWSER_ALL_FOR_NOW:
383 DNSServiceErrorType DNSSD_API DNSServiceBrowse(
384 DNSServiceRef *ret_sdref,
385 DNSServiceFlags flags,
389 DNSServiceBrowseReply callback,
392 DNSServiceErrorType ret = kDNSServiceErr_Unknown;
394 DNSServiceRef sdref = NULL;
395 AvahiIfIndex ifindex;
404 if (interface == kDNSServiceInterfaceIndexLocalOnly || flags != 0)
405 return kDNSServiceErr_Unsupported;
407 if (!(sdref = sdref_new()))
408 return kDNSServiceErr_Unknown;
410 sdref->context = context;
411 sdref->service_browser_callback = callback;
413 ASSERT_SUCCESS(pthread_mutex_lock(&sdref->mutex));
415 if (!(sdref->client = avahi_client_new(avahi_simple_poll_get(sdref->simple_poll), NULL, NULL, &error))) {
416 ret = map_error(error);
420 ifindex = interface == kDNSServiceInterfaceIndexAny ? AVAHI_IF_UNSPEC : (AvahiIfIndex) interface;
422 if (!(sdref->service_browser = avahi_service_browser_new(sdref->client, ifindex, AVAHI_PROTO_UNSPEC, regtype, domain, 0, service_browser_callback, sdref))) {
423 ret = map_error(avahi_client_errno(sdref->client));
428 ret = kDNSServiceErr_NoError;
433 ASSERT_SUCCESS(pthread_mutex_unlock(&sdref->mutex));
435 if (ret != kDNSServiceErr_NoError)
436 DNSServiceRefDeallocate(sdref);
441 static void service_resolver_callback(
442 AvahiServiceResolver *r,
443 AvahiIfIndex interface,
444 AvahiProtocol protocol,
445 AvahiResolverEvent event,
449 const char *host_name,
450 const AvahiAddress *a,
452 AvahiStringList *txt,
453 AvahiLookupResultFlags flags,
456 DNSServiceRef sdref = userdata;
462 case AVAHI_RESOLVER_FOUND: {
464 char full_name[kDNSServiceMaxDomainName];
469 if ((p = avahi_new0(char, (l = avahi_string_list_serialize(txt, NULL, 0))+1)))
470 avahi_string_list_serialize(txt, p, l);
472 ret = avahi_service_name_snprint(full_name, sizeof(full_name), name, type, domain);
473 assert(ret == AVAHI_OK);
475 sdref->service_resolver_callback(sdref, 0, interface, kDNSServiceErr_NoError, full_name, host_name, htons(port), l, p, sdref->context);
481 case AVAHI_RESOLVER_TIMEOUT:
482 case AVAHI_RESOLVER_NOT_FOUND:
483 sdref->service_resolver_callback(sdref, 0, interface, kDNSServiceErr_NoSuchName, NULL, NULL, 0, 0, NULL, sdref->context);
486 case AVAHI_RESOLVER_FAILURE:
487 sdref->service_resolver_callback(sdref, 0, interface, kDNSServiceErr_Unknown, NULL, NULL, 0, 0, NULL, sdref->context);
492 DNSServiceErrorType DNSSD_API DNSServiceResolve(
493 DNSServiceRef *ret_sdref,
494 DNSServiceFlags flags,
499 DNSServiceResolveReply callback,
502 DNSServiceErrorType ret = kDNSServiceErr_Unknown;
504 DNSServiceRef sdref = NULL;
505 AvahiIfIndex ifindex;
515 if (interface == kDNSServiceInterfaceIndexLocalOnly || flags != 0)
516 return kDNSServiceErr_Unsupported;
518 if (!(sdref = sdref_new()))
519 return kDNSServiceErr_Unknown;
521 sdref->context = context;
522 sdref->service_resolver_callback = callback;
524 ASSERT_SUCCESS(pthread_mutex_lock(&sdref->mutex));
526 if (!(sdref->client = avahi_client_new(avahi_simple_poll_get(sdref->simple_poll), NULL, NULL, &error))) {
527 ret = map_error(error);
531 ifindex = interface == kDNSServiceInterfaceIndexAny ? AVAHI_IF_UNSPEC : (AvahiIfIndex) interface;
533 if (!(sdref->service_resolver = avahi_service_resolver_new(sdref->client, ifindex, AVAHI_PROTO_UNSPEC, name, regtype, domain, AVAHI_PROTO_UNSPEC, 0, service_resolver_callback, sdref))) {
534 ret = map_error(avahi_client_errno(sdref->client));
539 ret = kDNSServiceErr_NoError;
544 ASSERT_SUCCESS(pthread_mutex_unlock(&sdref->mutex));
546 if (ret != kDNSServiceErr_NoError)
547 DNSServiceRefDeallocate(sdref);
552 int DNSSD_API DNSServiceConstructFullName (
556 const char *domain) {
564 if (avahi_service_name_snprint(fullName, kDNSServiceMaxDomainName, service, regtype, domain) < 0)