+++ /dev/null
-/* $Id$ */
-
-/***
- 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 <pthread.h>
-#include <assert.h>
-#include <unistd.h>
-#include <stdio.h>
-#include <errno.h>
-#include <string.h>
-#include <signal.h>
-#include <netinet/in.h>
-
-#include <avahi-common/simple-watch.h>
-#include <avahi-common/malloc.h>
-#include <avahi-common/error.h>
-#include <avahi-common/domain.h>
-#include <avahi-common/alternative.h>
-#include <avahi-client/client.h>
-
-#include "warn.h"
-#include "dns_sd.h"
-
-enum {
- COMMAND_POLL = 'P',
- COMMAND_QUIT = 'Q',
- COMMAND_POLLED = 'D'
-};
-
-struct _DNSServiceRef_t {
- int n_ref;
-
- AvahiSimplePoll *simple_poll;
-
- int thread_fd, main_fd;
-
- pthread_t thread;
- int thread_running;
-
- pthread_mutex_t mutex;
-
- void *context;
- DNSServiceBrowseReply service_browser_callback;
- DNSServiceResolveReply service_resolver_callback;
- DNSServiceDomainEnumReply domain_browser_callback;
- DNSServiceRegisterReply service_register_callback;
-
- AvahiClient *client;
- AvahiServiceBrowser *service_browser;
- AvahiServiceResolver *service_resolver;
- AvahiDomainBrowser *domain_browser;
-
- char *service_name, *service_name_chosen, *service_regtype, *service_domain, *service_host;
- uint16_t service_port;
- AvahiIfIndex service_interface;
- AvahiStringList *service_txt;
-
- AvahiEntryGroup *entry_group;
-};
-
-#define ASSERT_SUCCESS(r) { int __ret = (r); assert(__ret == 0); }
-
-static DNSServiceErrorType map_error(int error) {
- switch (error) {
- case AVAHI_OK :
- return kDNSServiceErr_NoError;
-
- case AVAHI_ERR_BAD_STATE :
- return kDNSServiceErr_BadState;
-
- case AVAHI_ERR_INVALID_HOST_NAME:
- case AVAHI_ERR_INVALID_DOMAIN_NAME:
- case AVAHI_ERR_INVALID_TTL:
- case AVAHI_ERR_IS_PATTERN:
- case AVAHI_ERR_INVALID_RECORD:
- case AVAHI_ERR_INVALID_SERVICE_NAME:
- case AVAHI_ERR_INVALID_SERVICE_TYPE:
- case AVAHI_ERR_INVALID_PORT:
- case AVAHI_ERR_INVALID_KEY:
- case AVAHI_ERR_INVALID_ADDRESS:
- return kDNSServiceErr_BadParam;
-
-
- case AVAHI_ERR_LOCAL_COLLISION:
- return kDNSServiceErr_NameConflict;
-
- case AVAHI_ERR_TOO_MANY_CLIENTS:
- case AVAHI_ERR_TOO_MANY_OBJECTS:
- case AVAHI_ERR_TOO_MANY_ENTRIES:
- case AVAHI_ERR_ACCESS_DENIED:
- return kDNSServiceErr_Refused;
-
- case AVAHI_ERR_INVALID_OPERATION:
- case AVAHI_ERR_INVALID_OBJECT:
- return kDNSServiceErr_Invalid;
-
- case AVAHI_ERR_NO_MEMORY:
- return kDNSServiceErr_NoMemory;
-
- case AVAHI_ERR_INVALID_INTERFACE:
- case AVAHI_ERR_INVALID_PROTOCOL:
- return kDNSServiceErr_BadInterfaceIndex;
-
- case AVAHI_ERR_INVALID_FLAGS:
- return kDNSServiceErr_BadFlags;
-
- case AVAHI_ERR_NOT_FOUND:
- return kDNSServiceErr_NoSuchName;
-
- case AVAHI_ERR_VERSION_MISMATCH:
- return kDNSServiceErr_Incompatible;
-
- case AVAHI_ERR_NO_NETWORK:
- case AVAHI_ERR_OS:
- case AVAHI_ERR_INVALID_CONFIG:
- case AVAHI_ERR_TIMEOUT:
- case AVAHI_ERR_DBUS_ERROR:
- case AVAHI_ERR_NOT_CONNECTED:
- case AVAHI_ERR_NO_DAEMON:
- break;
-
- }
-
- return kDNSServiceErr_Unknown;
-}
-
-static int read_command(int fd) {
- ssize_t r;
- char command;
-
- assert(fd >= 0);
-
- if ((r = read(fd, &command, 1)) != 1) {
- fprintf(stderr, __FILE__": read() failed: %s\n", r < 0 ? strerror(errno) : "EOF");
- return -1;
- }
-
- return command;
-}
-
-static int write_command(int fd, char reply) {
- assert(fd >= 0);
-
- if (write(fd, &reply, 1) != 1) {
- fprintf(stderr, __FILE__": write() failed: %s\n", strerror(errno));
- return -1;
- }
-
- return 0;
-}
-
-static int poll_func(struct pollfd *ufds, unsigned int nfds, int timeout, void *userdata) {
- DNSServiceRef sdref = userdata;
- int ret;
-
- assert(sdref);
-
- ASSERT_SUCCESS(pthread_mutex_unlock(&sdref->mutex));
-
-/* fprintf(stderr, "pre-syscall\n"); */
- ret = poll(ufds, nfds, timeout);
-/* fprintf(stderr, "post-syscall\n"); */
-
- ASSERT_SUCCESS(pthread_mutex_lock(&sdref->mutex));
-
- return ret;
-}
-
-static void * thread_func(void *data) {
- DNSServiceRef sdref = data;
- sigset_t mask;
-
- sigfillset(&mask);
- pthread_sigmask(SIG_BLOCK, &mask, NULL);
-
- sdref->thread = pthread_self();
- sdref->thread_running = 1;
-
- for (;;) {
- char command;
-
- if ((command = read_command(sdref->thread_fd)) < 0)
- break;
-
-/* fprintf(stderr, "Command: %c\n", command); */
-
- switch (command) {
-
- case COMMAND_POLL:
-
- ASSERT_SUCCESS(pthread_mutex_lock(&sdref->mutex));
-
-
- if (avahi_simple_poll_run(sdref->simple_poll) < 0) {
- fprintf(stderr, __FILE__": avahi_simple_poll_run() failed.\n");
- ASSERT_SUCCESS(pthread_mutex_unlock(&sdref->mutex));
- break;
- }
-
- if (write_command(sdref->thread_fd, COMMAND_POLLED) < 0) {
- ASSERT_SUCCESS(pthread_mutex_unlock(&sdref->mutex));
- break;
- }
-
- ASSERT_SUCCESS(pthread_mutex_unlock(&sdref->mutex));
-
- break;
-
- case COMMAND_QUIT:
- return NULL;
- }
-
- }
-
- return NULL;
-}
-
-static DNSServiceRef sdref_new(void) {
- int fd[2] = { -1, -1 };
- DNSServiceRef sdref = NULL;
- pthread_mutexattr_t mutex_attr;
-
- if (socketpair(AF_UNIX, SOCK_STREAM, 0, fd) < 0)
- goto fail;
-
- if (!(sdref = avahi_new(struct _DNSServiceRef_t, 1)))
- goto fail;
-
- sdref->n_ref = 1;
- sdref->thread_fd = fd[0];
- sdref->main_fd = fd[1];
-
- sdref->client = NULL;
- sdref->service_browser = NULL;
- sdref->service_resolver = NULL;
- sdref->domain_browser = NULL;
- sdref->entry_group = NULL;
-
- sdref->service_name = sdref->service_name_chosen = sdref->service_regtype = sdref->service_domain = sdref->service_host = NULL;
- sdref->service_txt = NULL;
-
- ASSERT_SUCCESS(pthread_mutexattr_init(&mutex_attr));
- pthread_mutexattr_settype(&mutex_attr, PTHREAD_MUTEX_RECURSIVE);
- ASSERT_SUCCESS(pthread_mutex_init(&sdref->mutex, NULL));
-
- sdref->thread_running = 0;
-
- if (!(sdref->simple_poll = avahi_simple_poll_new()))
- goto fail;
-
- avahi_simple_poll_set_func(sdref->simple_poll, poll_func, sdref);
-
- /* Start simple poll */
- if (avahi_simple_poll_prepare(sdref->simple_poll, -1) < 0)
- goto fail;
-
- /* Queue a initiall POLL command for the thread */
- if (write_command(sdref->main_fd, COMMAND_POLL) < 0)
- goto fail;
-
- if (pthread_create(&sdref->thread, NULL, thread_func, sdref) != 0)
- goto fail;
-
- sdref->thread_running = 1;
-
- return sdref;
-
-fail:
-
- if (sdref)
- DNSServiceRefDeallocate(sdref);
-
- return NULL;
-}
-
-static void sdref_free(DNSServiceRef sdref) {
- assert(sdref);
-
- if (sdref->thread_running) {
- write_command(sdref->main_fd, COMMAND_QUIT);
- avahi_simple_poll_wakeup(sdref->simple_poll);
- pthread_join(sdref->thread, NULL);
- }
-
- if (sdref->client)
- avahi_client_free(sdref->client);
-
- if (sdref->thread_fd >= 0)
- close(sdref->thread_fd);
-
- if (sdref->main_fd >= 0)
- close(sdref->main_fd);
-
- if (sdref->simple_poll)
- avahi_simple_poll_free(sdref->simple_poll);
-
- pthread_mutex_destroy(&sdref->mutex);
-
- avahi_free(sdref->service_name);
- avahi_free(sdref->service_name_chosen);
- avahi_free(sdref->service_regtype);
- avahi_free(sdref->service_domain);
- avahi_free(sdref->service_host);
-
- avahi_string_list_free(sdref->service_txt);
-
- avahi_free(sdref);
-}
-
-static void sdref_ref(DNSServiceRef sdref) {
- assert(sdref);
- assert(sdref->n_ref >= 1);
-
- sdref->n_ref++;
-}
-
-static void sdref_unref(DNSServiceRef sdref) {
- assert(sdref);
- assert(sdref->n_ref >= 1);
-
- if (--(sdref->n_ref) <= 0)
- sdref_free(sdref);
-}
-
-int DNSSD_API DNSServiceRefSockFD(DNSServiceRef sdref) {
- assert(sdref);
- assert(sdref->n_ref >= 1);
-
- AVAHI_WARN_LINKAGE;
-
- return sdref->main_fd;
-}
-
-DNSServiceErrorType DNSSD_API DNSServiceProcessResult(DNSServiceRef sdref) {
- DNSServiceErrorType ret = kDNSServiceErr_Unknown;
-
- assert(sdref);
- assert(sdref->n_ref >= 1);
-
- AVAHI_WARN_LINKAGE;
-
- sdref_ref(sdref);
-
- ASSERT_SUCCESS(pthread_mutex_lock(&sdref->mutex));
-
- /* Cleanup notification socket */
- if (read_command(sdref->main_fd) != COMMAND_POLLED)
- goto finish;
-
- if (avahi_simple_poll_dispatch(sdref->simple_poll) < 0)
- goto finish;
-
- if (sdref->n_ref > 1) /* Perhaps we should die */
-
- /* Dispatch events */
- if (avahi_simple_poll_prepare(sdref->simple_poll, -1) < 0)
- goto finish;
-
- if (sdref->n_ref > 1)
-
- /* Request the poll */
- if (write_command(sdref->main_fd, COMMAND_POLL) < 0)
- goto finish;
-
- ret = kDNSServiceErr_NoError;
-
-finish:
-
- ASSERT_SUCCESS(pthread_mutex_unlock(&sdref->mutex));
-
- sdref_unref(sdref);
-
- return ret;
-}
-
-void DNSSD_API DNSServiceRefDeallocate(DNSServiceRef sdref) {
- assert(sdref);
- assert(sdref->n_ref >= 1);
-
- AVAHI_WARN_LINKAGE;
-
- sdref_unref(sdref);
-}
-
-static void service_browser_callback(
- AvahiServiceBrowser *b,
- AvahiIfIndex interface,
- AvahiProtocol protocol,
- AvahiBrowserEvent event,
- const char *name,
- const char *type,
- const char *domain,
- AvahiLookupResultFlags flags,
- void *userdata) {
-
- DNSServiceRef sdref = userdata;
-
- assert(b);
- assert(sdref);
- assert(sdref->n_ref >= 1);
-
- switch (event) {
- case AVAHI_BROWSER_NEW:
- sdref->service_browser_callback(sdref, kDNSServiceFlagsAdd, interface, kDNSServiceErr_NoError, name, type, domain, sdref->context);
- break;
-
- case AVAHI_BROWSER_REMOVE:
- sdref->service_browser_callback(sdref, 0, interface, kDNSServiceErr_NoError, name, type, domain, sdref->context);
- break;
-
- case AVAHI_BROWSER_FAILURE:
- sdref->service_browser_callback(sdref, 0, interface, kDNSServiceErr_Unknown, NULL, NULL, NULL, sdref->context);
- break;
-
- case AVAHI_BROWSER_NOT_FOUND:
- sdref->service_browser_callback(sdref, 0, interface, kDNSServiceErr_NoSuchName, NULL, NULL, NULL, sdref->context);
- break;
-
- case AVAHI_BROWSER_CACHE_EXHAUSTED:
- case AVAHI_BROWSER_ALL_FOR_NOW:
- break;
- }
-}
-
-static void generic_client_callback(AvahiClient *s, AvahiClientState state, void* userdata) {
- DNSServiceRef sdref = userdata;
-
- assert(s);
- assert(sdref);
- assert(sdref->n_ref >= 1);
-
- switch (state) {
- case AVAHI_CLIENT_DISCONNECTED: {
-
- if (sdref->service_browser_callback)
- sdref->service_browser_callback(sdref, 0, 0, kDNSServiceErr_Unknown, NULL, NULL, NULL, sdref->context);
- else if (sdref->service_resolver_callback)
- sdref->service_resolver_callback(sdref, 0, 0, kDNSServiceErr_Unknown, NULL, NULL, 0, 0, NULL, sdref->context);
- else if (sdref->domain_browser_callback)
- sdref->domain_browser_callback(sdref, 0, 0, kDNSServiceErr_Unknown, NULL, sdref->context);
-
- break;
- }
-
- case AVAHI_CLIENT_S_RUNNING:
- case AVAHI_CLIENT_S_COLLISION:
- case AVAHI_CLIENT_S_INVALID:
- case AVAHI_CLIENT_S_REGISTERING:
- break;
- }
-}
-
-DNSServiceErrorType DNSSD_API DNSServiceBrowse(
- DNSServiceRef *ret_sdref,
- DNSServiceFlags flags,
- uint32_t interface,
- const char *regtype,
- const char *domain,
- DNSServiceBrowseReply callback,
- void *context) {
-
- DNSServiceErrorType ret = kDNSServiceErr_Unknown;
- int error;
- DNSServiceRef sdref = NULL;
- AvahiIfIndex ifindex;
-
- AVAHI_WARN_LINKAGE;
-
- assert(ret_sdref);
- assert(regtype);
- assert(domain);
- assert(callback);
-
- if (interface == kDNSServiceInterfaceIndexLocalOnly || flags != 0)
- return kDNSServiceErr_Unsupported;
-
- if (!(sdref = sdref_new()))
- return kDNSServiceErr_Unknown;
-
- sdref->context = context;
- sdref->service_browser_callback = callback;
-
- ASSERT_SUCCESS(pthread_mutex_lock(&sdref->mutex));
-
- if (!(sdref->client = avahi_client_new(avahi_simple_poll_get(sdref->simple_poll), generic_client_callback, sdref, &error))) {
- ret = map_error(error);
- goto finish;
- }
-
- ifindex = interface == kDNSServiceInterfaceIndexAny ? AVAHI_IF_UNSPEC : (AvahiIfIndex) interface;
-
- if (!(sdref->service_browser = avahi_service_browser_new(sdref->client, ifindex, AVAHI_PROTO_UNSPEC, regtype, domain, 0, service_browser_callback, sdref))) {
- ret = map_error(avahi_client_errno(sdref->client));
- goto finish;
- }
-
- ret = kDNSServiceErr_NoError;
- *ret_sdref = sdref;
-
-finish:
-
- ASSERT_SUCCESS(pthread_mutex_unlock(&sdref->mutex));
-
- if (ret != kDNSServiceErr_NoError)
- DNSServiceRefDeallocate(sdref);
-
- return ret;
-}
-
-static void service_resolver_callback(
- AvahiServiceResolver *r,
- AvahiIfIndex interface,
- AvahiProtocol protocol,
- AvahiResolverEvent event,
- const char *name,
- const char *type,
- const char *domain,
- const char *host_name,
- const AvahiAddress *a,
- uint16_t port,
- AvahiStringList *txt,
- AvahiLookupResultFlags flags,
- void *userdata) {
-
- DNSServiceRef sdref = userdata;
-
- assert(r);
- assert(sdref);
- assert(sdref->n_ref >= 1);
-
- switch (event) {
- case AVAHI_RESOLVER_FOUND: {
-
- char full_name[kDNSServiceMaxDomainName];
- int ret;
- char *p = NULL;
- size_t l = 0;
-
- if ((p = avahi_new0(char, (l = avahi_string_list_serialize(txt, NULL, 0))+1)))
- avahi_string_list_serialize(txt, p, l);
-
- ret = avahi_service_name_snprint(full_name, sizeof(full_name), name, type, domain);
- assert(ret == AVAHI_OK);
-
- sdref->service_resolver_callback(sdref, 0, interface, kDNSServiceErr_NoError, full_name, host_name, htons(port), l, p, sdref->context);
-
- avahi_free(p);
- break;
- }
-
- case AVAHI_RESOLVER_TIMEOUT:
- case AVAHI_RESOLVER_NOT_FOUND:
- sdref->service_resolver_callback(sdref, 0, interface, kDNSServiceErr_NoSuchName, NULL, NULL, 0, 0, NULL, sdref->context);
- break;
-
- case AVAHI_RESOLVER_FAILURE:
- sdref->service_resolver_callback(sdref, 0, interface, kDNSServiceErr_Unknown, NULL, NULL, 0, 0, NULL, sdref->context);
-
- }
-}
-
-DNSServiceErrorType DNSSD_API DNSServiceResolve(
- DNSServiceRef *ret_sdref,
- DNSServiceFlags flags,
- uint32_t interface,
- const char *name,
- const char *regtype,
- const char *domain,
- DNSServiceResolveReply callback,
- void *context) {
-
- DNSServiceErrorType ret = kDNSServiceErr_Unknown;
- int error;
- DNSServiceRef sdref = NULL;
- AvahiIfIndex ifindex;
-
- AVAHI_WARN_LINKAGE;
-
- assert(ret_sdref);
- assert(name);
- assert(regtype);
- assert(domain);
- assert(callback);
-
- if (interface == kDNSServiceInterfaceIndexLocalOnly || flags != 0)
- return kDNSServiceErr_Unsupported;
-
- if (!(sdref = sdref_new()))
- return kDNSServiceErr_Unknown;
-
- sdref->context = context;
- sdref->service_resolver_callback = callback;
-
- ASSERT_SUCCESS(pthread_mutex_lock(&sdref->mutex));
-
- if (!(sdref->client = avahi_client_new(avahi_simple_poll_get(sdref->simple_poll), generic_client_callback, sdref, &error))) {
- ret = map_error(error);
- goto finish;
- }
-
- ifindex = interface == kDNSServiceInterfaceIndexAny ? AVAHI_IF_UNSPEC : (AvahiIfIndex) interface;
-
- 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))) {
- ret = map_error(avahi_client_errno(sdref->client));
- goto finish;
- }
-
-
- ret = kDNSServiceErr_NoError;
- *ret_sdref = sdref;
-
-finish:
-
- ASSERT_SUCCESS(pthread_mutex_unlock(&sdref->mutex));
-
- if (ret != kDNSServiceErr_NoError)
- DNSServiceRefDeallocate(sdref);
-
- return ret;
-}
-
-int DNSSD_API DNSServiceConstructFullName (
- char *fullName,
- const char *service,
- const char *regtype,
- const char *domain) {
-
- AVAHI_WARN_LINKAGE;
-
- assert(fullName);
- assert(regtype);
- assert(domain);
-
- if (avahi_service_name_snprint(fullName, kDNSServiceMaxDomainName, service, regtype, domain) < 0)
- return -1;
-
- return 0;
-}
-
-static void domain_browser_callback(
- AvahiDomainBrowser *b,
- AvahiIfIndex interface,
- AvahiProtocol protocol,
- AvahiBrowserEvent event,
- const char *domain,
- AvahiLookupResultFlags flags,
- void *userdata) {
-
- DNSServiceRef sdref = userdata;
-
- assert(b);
- assert(sdref);
- assert(sdref->n_ref >= 1);
-
- switch (event) {
- case AVAHI_BROWSER_NEW:
- sdref->domain_browser_callback(sdref, kDNSServiceFlagsAdd, interface, kDNSServiceErr_NoError, domain, sdref->context);
- break;
-
- case AVAHI_BROWSER_REMOVE:
- sdref->domain_browser_callback(sdref, 0, interface, kDNSServiceErr_NoError, domain, sdref->context);
- break;
-
- case AVAHI_BROWSER_FAILURE:
- sdref->domain_browser_callback(sdref, 0, interface, kDNSServiceErr_Unknown, domain, sdref->context);
- break;
-
- case AVAHI_BROWSER_NOT_FOUND:
- sdref->domain_browser_callback(sdref, 0, interface, kDNSServiceErr_NoSuchName, domain, sdref->context);
- break;
-
- case AVAHI_BROWSER_CACHE_EXHAUSTED:
- case AVAHI_BROWSER_ALL_FOR_NOW:
- break;
- }
-}
-
-DNSServiceErrorType DNSSD_API DNSServiceEnumerateDomains(
- DNSServiceRef *ret_sdref,
- DNSServiceFlags flags,
- uint32_t interface,
- DNSServiceDomainEnumReply callback,
- void *context) {
-
- DNSServiceErrorType ret = kDNSServiceErr_Unknown;
- int error;
- DNSServiceRef sdref = NULL;
- AvahiIfIndex ifindex;
-
- AVAHI_WARN_LINKAGE;
-
- assert(ret_sdref);
- assert(callback);
-
- if (interface == kDNSServiceInterfaceIndexLocalOnly ||
- (flags != kDNSServiceFlagsBrowseDomains && flags != kDNSServiceFlagsRegistrationDomains))
- return kDNSServiceErr_Unsupported;
-
- if (!(sdref = sdref_new()))
- return kDNSServiceErr_Unknown;
-
- sdref->context = context;
- sdref->domain_browser_callback = callback;
-
- ASSERT_SUCCESS(pthread_mutex_lock(&sdref->mutex));
-
- if (!(sdref->client = avahi_client_new(avahi_simple_poll_get(sdref->simple_poll), generic_client_callback, sdref, &error))) {
- ret = map_error(error);
- goto finish;
- }
-
- ifindex = interface == kDNSServiceInterfaceIndexAny ? AVAHI_IF_UNSPEC : (AvahiIfIndex) interface;
-
- if (!(sdref->domain_browser = avahi_domain_browser_new(sdref->client, ifindex, AVAHI_PROTO_UNSPEC, NULL,
- flags == kDNSServiceFlagsRegistrationDomains ? AVAHI_DOMAIN_BROWSER_REGISTER : AVAHI_DOMAIN_BROWSER_BROWSE,
- 0, domain_browser_callback, sdref))) {
- ret = map_error(avahi_client_errno(sdref->client));
- goto finish;
- }
-
- ret = kDNSServiceErr_NoError;
- *ret_sdref = sdref;
-
-finish:
-
- ASSERT_SUCCESS(pthread_mutex_unlock(&sdref->mutex));
-
- if (ret != kDNSServiceErr_NoError)
- DNSServiceRefDeallocate(sdref);
-
- return ret;
-}
-
-static void reg_report_error(DNSServiceRef sdref, DNSServiceErrorType error) {
- assert(sdref);
- assert(sdref->n_ref >= 1);
-
- assert(sdref->service_register_callback);
-
- sdref->service_register_callback(
- sdref, 0, error,
- sdref->service_name_chosen ? sdref->service_name_chosen : sdref->service_name,
- sdref->service_regtype,
- sdref->service_domain,
- sdref->context);
-}
-
-static int reg_create_service(DNSServiceRef sdref) {
- int ret;
- assert(sdref);
- assert(sdref->n_ref >= 1);
-
- if ((ret = avahi_entry_group_add_service_strlst(
- sdref->entry_group,
- sdref->service_interface,
- AVAHI_PROTO_UNSPEC,
- 0,
- sdref->service_name_chosen,
- sdref->service_regtype,
- sdref->service_domain,
- sdref->service_host,
- sdref->service_port,
- sdref->service_txt)) < 0)
- return ret;
-
- if ((ret = avahi_entry_group_commit(sdref->entry_group)) < 0)
- return ret;
-
- return 0;
-}
-
-static void reg_client_callback(AvahiClient *s, AvahiClientState state, void* userdata) {
- DNSServiceRef sdref = userdata;
-
- assert(s);
- assert(sdref);
- assert(sdref->n_ref >= 1);
-
- /* We've not been setup completely */
- if (!sdref->entry_group)
- return;
-
- switch (state) {
- case AVAHI_CLIENT_DISCONNECTED: {
-
- reg_report_error(sdref, kDNSServiceErr_NoError);
- break;
- }
-
- case AVAHI_CLIENT_S_RUNNING: {
- int ret;
-
- if (!sdref->service_name) {
- const char *n;
- /* If the service name is taken from the host name, copy that */
-
- avahi_free(sdref->service_name_chosen);
-
- if (!(n = avahi_client_get_host_name(sdref->client))) {
- reg_report_error(sdref, map_error(avahi_client_errno(sdref->client)));
- return;
- }
-
- if (!(sdref->service_name_chosen = avahi_strdup(n))) {
- reg_report_error(sdref, kDNSServiceErr_NoMemory);
- return;
- }
- }
-
- /* Register the service */
-
- if ((ret = reg_create_service(sdref)) < 0) {
- reg_report_error(sdref, map_error(ret));
- return;
- }
-
- break;
- }
-
- case AVAHI_CLIENT_S_COLLISION:
-
- /* Remove our entry */
- avahi_entry_group_reset(sdref->entry_group);
-
- break;
-
- case AVAHI_CLIENT_S_INVALID:
- case AVAHI_CLIENT_S_REGISTERING:
- /* Ignore */
- break;
- }
-
-}
-
-static void reg_entry_group_callback(AvahiEntryGroup *g, AvahiEntryGroupState state, void *userdata) {
- DNSServiceRef sdref = userdata;
-
- assert(g);
-
- switch (state) {
- case AVAHI_ENTRY_GROUP_ESTABLISHED:
- /* Inform the user */
- reg_report_error(sdref, kDNSServiceErr_NoError);
-
- break;
-
- case AVAHI_ENTRY_GROUP_COLLISION: {
- char *n;
- int ret;
-
- /* Remove our entry */
- avahi_entry_group_reset(sdref->entry_group);
-
- assert(sdref->service_name_chosen);
-
- /* Pick a new name */
- if (!(n = avahi_alternative_service_name(sdref->service_name_chosen))) {
- reg_report_error(sdref, kDNSServiceErr_NoMemory);
- return;
- }
- avahi_free(sdref->service_name_chosen);
- sdref->service_name_chosen = n;
-
- /* Register the service with that new name */
- if ((ret = reg_create_service(sdref)) < 0) {
- reg_report_error(sdref, map_error(ret));
- return;
- }
-
- break;
- }
-
- case AVAHI_ENTRY_GROUP_REGISTERING:
- case AVAHI_ENTRY_GROUP_UNCOMMITED:
- /* Ignore */
- break;
- }
-}
-
-DNSServiceErrorType DNSSD_API DNSServiceRegister (
- DNSServiceRef *ret_sdref,
- DNSServiceFlags flags,
- uint32_t interface,
- const char *name,
- const char *regtype,
- const char *domain,
- const char *host,
- uint16_t port,
- uint16_t txtLen,
- const void *txtRecord,
- DNSServiceRegisterReply callback,
- void *context) {
-
- DNSServiceErrorType ret = kDNSServiceErr_Unknown;
- int error;
- DNSServiceRef sdref = NULL;
-
- AVAHI_WARN_LINKAGE;
-
- assert(ret_sdref);
- assert(callback);
- assert(regtype);
-
- if (interface == kDNSServiceInterfaceIndexLocalOnly || flags)
- return kDNSServiceErr_Unsupported;
-
- if (!(sdref = sdref_new()))
- return kDNSServiceErr_Unknown;
-
- sdref->context = context;
- sdref->service_register_callback = callback;
-
- sdref->service_name = avahi_strdup(name);
- sdref->service_regtype = avahi_strdup(regtype);
- sdref->service_domain = avahi_strdup(domain);
- sdref->service_host = avahi_strdup(host);
- sdref->service_interface = interface == kDNSServiceInterfaceIndexAny ? AVAHI_IF_UNSPEC : (AvahiIfIndex) interface;
- sdref->service_port = ntohs(port);
- sdref->service_txt = txtRecord ? avahi_string_list_parse(txtRecord, txtLen) : NULL;
-
- ASSERT_SUCCESS(pthread_mutex_lock(&sdref->mutex));
-
- if (!(sdref->client = avahi_client_new(avahi_simple_poll_get(sdref->simple_poll), reg_client_callback, sdref, &error))) {
- ret = map_error(error);
- goto finish;
- }
-
- if (!sdref->service_domain) {
- const char *d;
-
- if (!(d = avahi_client_get_domain_name(sdref->client))) {
- ret = map_error(avahi_client_errno(sdref->client));
- goto finish;
- }
-
- if (!(sdref->service_domain = avahi_strdup(d))) {
- ret = kDNSServiceErr_NoMemory;
- goto finish;
- }
- }
-
- if (!(sdref->entry_group = avahi_entry_group_new(sdref->client, reg_entry_group_callback, sdref))) {
- ret = map_error(avahi_client_errno(sdref->client));
- goto finish;
- }
-
- if (avahi_client_get_state(sdref->client) == AVAHI_CLIENT_S_RUNNING) {
- const char *n;
-
- if (sdref->service_name)
- n = sdref->service_name;
- else {
- if (!(n = avahi_client_get_host_name(sdref->client))) {
- ret = map_error(avahi_client_errno(sdref->client));
- goto finish;
- }
- }
-
- if (!(sdref->service_name_chosen = avahi_strdup(n))) {
- ret = kDNSServiceErr_NoMemory;
- goto finish;
- }
-
-
- if ((error = reg_create_service(sdref)) < 0) {
- ret = map_error(error);
- goto finish;
- }
- }
-
- ret = kDNSServiceErr_NoError;
- *ret_sdref = sdref;
-
-finish:
-
- ASSERT_SUCCESS(pthread_mutex_unlock(&sdref->mutex));
-
- if (ret != kDNSServiceErr_NoError)
- DNSServiceRefDeallocate(sdref);
-
- return ret;
-}
-
+++ /dev/null
-/*
- * Copyright (c) 2003-2004, Apple Computer, Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of its
- * contributors may be used to endorse or promote products derived from this
- * software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef _DNS_SD_H
-#define _DNS_SD_H
-
-#ifdef __cplusplus
- extern "C" {
-#endif
-
-/* standard calling convention under Win32 is __stdcall */
-#if defined(_WIN32)
-#define DNSSD_API __stdcall
-#else
-#define DNSSD_API
-#endif
-
-#if defined(__FreeBSD_version) && (__FreeBSD_version < 500000)
-/* stdint.h does not exist on FreeBSD 4.x; its types are defined in sys/types.h instead */
-#include <sys/types.h>
-#elif defined(__sun__)
-#include <sys/types.h>
-#elif defined(_WIN32)
-#include <windows.h>
-#define _UNUSED
-#define bzero(a, b) memset(a, 0, b)
-#ifndef _MSL_STDINT_H
-typedef UINT8 uint8_t;
-typedef INT8 int8_t;
-typedef UINT16 uint16_t;
-typedef INT16 int16_t;
-typedef UINT32 uint32_t;
-typedef INT32 int32_t;
-#endif
-#else
-#include <stdint.h>
-#endif
-
-/* DNSServiceRef, DNSRecordRef
- *
- * Opaque internal data types.
- * Note: client is responsible for serializing access to these structures if
- * they are shared between concurrent threads.
- */
-
-typedef struct _DNSServiceRef_t *DNSServiceRef;
-typedef struct _DNSRecordRef_t *DNSRecordRef;
-
-/* General flags used in functions defined below */
-enum
- {
- kDNSServiceFlagsMoreComing = 0x1,
- /* MoreComing indicates to a callback that at least one more result is
- * queued and will be delivered following immediately after this one.
- * Applications should not update their UI to display browse
- * results when the MoreComing flag is set, because this would
- * result in a great deal of ugly flickering on the screen.
- * Applications should instead wait until until MoreComing is not set,
- * and then update their UI.
- * When MoreComing is not set, that doesn't mean there will be no more
- * answers EVER, just that there are no more answers immediately
- * available right now at this instant. If more answers become available
- * in the future they will be delivered as usual.
- */
-
- kDNSServiceFlagsAdd = 0x2,
- kDNSServiceFlagsDefault = 0x4,
- /* Flags for domain enumeration and browse/query reply callbacks.
- * "Default" applies only to enumeration and is only valid in
- * conjuction with "Add". An enumeration callback with the "Add"
- * flag NOT set indicates a "Remove", i.e. the domain is no longer
- * valid.
- */
-
- kDNSServiceFlagsNoAutoRename = 0x8,
- /* Flag for specifying renaming behavior on name conflict when registering
- * non-shared records. By default, name conflicts are automatically handled
- * by renaming the service. NoAutoRename overrides this behavior - with this
- * flag set, name conflicts will result in a callback. The NoAutorename flag
- * is only valid if a name is explicitly specified when registering a service
- * (i.e. the default name is not used.)
- */
-
- kDNSServiceFlagsShared = 0x10,
- kDNSServiceFlagsUnique = 0x20,
- /* Flag for registering individual records on a connected
- * DNSServiceRef. Shared indicates that there may be multiple records
- * with this name on the network (e.g. PTR records). Unique indicates that the
- * record's name is to be unique on the network (e.g. SRV records).
- */
-
- kDNSServiceFlagsBrowseDomains = 0x40,
- kDNSServiceFlagsRegistrationDomains = 0x80,
- /* Flags for specifying domain enumeration type in DNSServiceEnumerateDomains.
- * BrowseDomains enumerates domains recommended for browsing, RegistrationDomains
- * enumerates domains recommended for registration.
- */
-
- kDNSServiceFlagsLongLivedQuery = 0x100,
- /* Flag for creating a long-lived unicast query for the DNSServiceQueryRecord call. */
-
- kDNSServiceFlagsAllowRemoteQuery = 0x200,
- /* Flag for creating a record for which we will answer remote queries
- * (queries from hosts more than one hop away; hosts not directly connected to the local link).
- */
-
- kDNSServiceFlagsForceMulticast = 0x400
- /* Flag for signifying that a query or registration should be performed exclusively via multicast DNS,
- * even for a name in a domain (e.g. foo.apple.com.) that would normally imply unicast DNS.
- */
- };
-
-/*
- * The values for DNS Classes and Types are listed in RFC 1035, and are available
- * on every OS in its DNS header file. Unfortunately every OS does not have the
- * same header file containing DNS Class and Type constants, and the names of
- * the constants are not consistent. For example, BIND 8 uses "T_A",
- * BIND 9 uses "ns_t_a", Windows uses "DNS_TYPE_A", etc.
- * For this reason, these constants are also listed here, so that code using
- * the DNS-SD programming APIs can use these constants, so that the same code
- * can compile on all our supported platforms.
- */
-
-enum
- {
- kDNSServiceClass_IN = 1 /* Internet */
- };
-
-enum
- {
- kDNSServiceType_A = 1, /* Host address. */
- kDNSServiceType_NS = 2, /* Authoritative server. */
- kDNSServiceType_MD = 3, /* Mail destination. */
- kDNSServiceType_MF = 4, /* Mail forwarder. */
- kDNSServiceType_CNAME = 5, /* Canonical name. */
- kDNSServiceType_SOA = 6, /* Start of authority zone. */
- kDNSServiceType_MB = 7, /* Mailbox domain name. */
- kDNSServiceType_MG = 8, /* Mail group member. */
- kDNSServiceType_MR = 9, /* Mail rename name. */
- kDNSServiceType_NULL = 10, /* Null resource record. */
- kDNSServiceType_WKS = 11, /* Well known service. */
- kDNSServiceType_PTR = 12, /* Domain name pointer. */
- kDNSServiceType_HINFO = 13, /* Host information. */
- kDNSServiceType_MINFO = 14, /* Mailbox information. */
- kDNSServiceType_MX = 15, /* Mail routing information. */
- kDNSServiceType_TXT = 16, /* One or more text strings. */
- kDNSServiceType_RP = 17, /* Responsible person. */
- kDNSServiceType_AFSDB = 18, /* AFS cell database. */
- kDNSServiceType_X25 = 19, /* X_25 calling address. */
- kDNSServiceType_ISDN = 20, /* ISDN calling address. */
- kDNSServiceType_RT = 21, /* Router. */
- kDNSServiceType_NSAP = 22, /* NSAP address. */
- kDNSServiceType_NSAP_PTR = 23, /* Reverse NSAP lookup (deprecated). */
- kDNSServiceType_SIG = 24, /* Security signature. */
- kDNSServiceType_KEY = 25, /* Security key. */
- kDNSServiceType_PX = 26, /* X.400 mail mapping. */
- kDNSServiceType_GPOS = 27, /* Geographical position (withdrawn). */
- kDNSServiceType_AAAA = 28, /* Ip6 Address. */
- kDNSServiceType_LOC = 29, /* Location Information. */
- kDNSServiceType_NXT = 30, /* Next domain (security). */
- kDNSServiceType_EID = 31, /* Endpoint identifier. */
- kDNSServiceType_NIMLOC = 32, /* Nimrod Locator. */
- kDNSServiceType_SRV = 33, /* Server Selection. */
- kDNSServiceType_ATMA = 34, /* ATM Address */
- kDNSServiceType_NAPTR = 35, /* Naming Authority PoinTeR */
- kDNSServiceType_KX = 36, /* Key Exchange */
- kDNSServiceType_CERT = 37, /* Certification record */
- kDNSServiceType_A6 = 38, /* IPv6 address (deprecates AAAA) */
- kDNSServiceType_DNAME = 39, /* Non-terminal DNAME (for IPv6) */
- kDNSServiceType_SINK = 40, /* Kitchen sink (experimentatl) */
- kDNSServiceType_OPT = 41, /* EDNS0 option (meta-RR) */
- kDNSServiceType_TKEY = 249, /* Transaction key */
- kDNSServiceType_TSIG = 250, /* Transaction signature. */
- kDNSServiceType_IXFR = 251, /* Incremental zone transfer. */
- kDNSServiceType_AXFR = 252, /* Transfer zone of authority. */
- kDNSServiceType_MAILB = 253, /* Transfer mailbox records. */
- kDNSServiceType_MAILA = 254, /* Transfer mail agent records. */
- kDNSServiceType_ANY = 255 /* Wildcard match. */
- };
-
-
-/* possible error code values */
-enum
- {
- kDNSServiceErr_NoError = 0,
- kDNSServiceErr_Unknown = -65537, /* 0xFFFE FFFF */
- kDNSServiceErr_NoSuchName = -65538,
- kDNSServiceErr_NoMemory = -65539,
- kDNSServiceErr_BadParam = -65540,
- kDNSServiceErr_BadReference = -65541,
- kDNSServiceErr_BadState = -65542,
- kDNSServiceErr_BadFlags = -65543,
- kDNSServiceErr_Unsupported = -65544,
- kDNSServiceErr_NotInitialized = -65545,
- kDNSServiceErr_AlreadyRegistered = -65547,
- kDNSServiceErr_NameConflict = -65548,
- kDNSServiceErr_Invalid = -65549,
- kDNSServiceErr_Firewall = -65550,
- kDNSServiceErr_Incompatible = -65551, /* client library incompatible with daemon */
- kDNSServiceErr_BadInterfaceIndex = -65552,
- kDNSServiceErr_Refused = -65553,
- kDNSServiceErr_NoSuchRecord = -65554,
- kDNSServiceErr_NoAuth = -65555,
- kDNSServiceErr_NoSuchKey = -65556,
- kDNSServiceErr_NATTraversal = -65557,
- kDNSServiceErr_DoubleNAT = -65558,
- kDNSServiceErr_BadTime = -65559
- /* mDNS Error codes are in the range
- * FFFE FF00 (-65792) to FFFE FFFF (-65537) */
- };
-
-
-/* Maximum length, in bytes, of a service name represented as a */
-/* literal C-String, including the terminating NULL at the end. */
-
-#define kDNSServiceMaxServiceName 64
-
-/* Maximum length, in bytes, of a domain name represented as an *escaped* C-String */
-/* including the final trailing dot, and the C-String terminating NULL at the end. */
-
-#define kDNSServiceMaxDomainName 1005
-
-/*
- * Notes on DNS Name Escaping
- * -- or --
- * "Why is kDNSServiceMaxDomainName 1005, when the maximum legal domain name is 255 bytes?"
- *
- * All strings used in DNS-SD are UTF-8 strings.
- * With few exceptions, most are also escaped using standard DNS escaping rules:
- *
- * '\\' represents a single literal '\' in the name
- * '\.' represents a single literal '.' in the name
- * '\ddd', where ddd is a three-digit decimal value from 000 to 255,
- * represents a single literal byte with that value.
- * A bare unescaped '.' is a label separator, marking a boundary between domain and subdomain.
- *
- * The exceptions, that do not use escaping, are the routines where the full
- * DNS name of a resource is broken, for convenience, into servicename/regtype/domain.
- * In these routines, the "servicename" is NOT escaped. It does not need to be, since
- * it is, by definition, just a single literal string. Any characters in that string
- * represent exactly what they are. The "regtype" portion is, technically speaking,
- * escaped, but since legal regtypes are only allowed to contain letters, digits,
- * and hyphens, there is nothing to escape, so the issue is moot. The "domain"
- * portion is also escaped, though most domains in use on the public Internet
- * today, like regtypes, don't contain any characters that need to be escaped.
- * As DNS-SD becomes more popular, rich-text domains for service discovery will
- * become common, so software should be written to cope with domains with escaping.
- *
- * The servicename may be up to 63 bytes of UTF-8 text (not counting the C-String
- * terminating NULL at the end). The regtype is of the form _service._tcp or
- * _service._udp, where the "service" part is 1-14 characters, which may be
- * letters, digits, or hyphens. The domain part of the three-part name may be
- * any legal domain, providing that the resulting servicename+regtype+domain
- * name does not exceed 255 bytes.
- *
- * For most software, these issues are transparent. When browsing, the discovered
- * servicenames should simply be displayed as-is. When resolving, the discovered
- * servicename/regtype/domain are simply passed unchanged to DNSServiceResolve().
- * When a DNSServiceResolve() succeeds, the returned fullname is already in
- * the correct format to pass to standard system DNS APIs such as res_query().
- * For converting from servicename/regtype/domain to a single properly-escaped
- * full DNS name, the helper function DNSServiceConstructFullName() is provided.
- *
- * The following (highly contrived) example illustrates the escaping process.
- * Suppose you have an service called "Dr. Smith\Dr. Johnson", of type "_ftp._tcp"
- * in subdomain "4th. Floor" of subdomain "Building 2" of domain "apple.com."
- * The full (escaped) DNS name of this service's SRV record would be:
- * Dr\.\032Smith\\Dr\.\032Johnson._ftp._tcp.4th\.\032Floor.Building\0322.apple.com.
- */
-
-
-/*
- * Constants for specifying an interface index
- *
- * Specific interface indexes are identified via a 32-bit unsigned integer returned
- * by the if_nametoindex() family of calls.
- *
- * If the client passes 0 for interface index, that means "do the right thing",
- * which (at present) means, "if the name is in an mDNS local multicast domain
- * (e.g. 'local.', '254.169.in-addr.arpa.', '0.8.E.F.ip6.arpa.') then multicast
- * on all applicable interfaces, otherwise send via unicast to the appropriate
- * DNS server." Normally, most clients will use 0 for interface index to
- * automatically get the default sensible behaviour.
- *
- * If the client passes a positive interface index, then for multicast names that
- * indicates to do the operation only on that one interface. For unicast names the
- * interface index is ignored unless kDNSServiceFlagsForceMulticast is also set.
- *
- * If the client passes kDNSServiceInterfaceIndexLocalOnly when registering
- * a service, then that service will be found *only* by other local clients
- * on the same machine that are browsing using kDNSServiceInterfaceIndexLocalOnly
- * or kDNSServiceInterfaceIndexAny.
- * If a client has a 'private' service, accessible only to other processes
- * running on the same machine, this allows the client to advertise that service
- * in a way such that it does not inadvertently appear in service lists on
- * all the other machines on the network.
- *
- * If the client passes kDNSServiceInterfaceIndexLocalOnly when browsing
- * then it will find *all* records registered on that same local machine.
- * Clients explicitly wishing to discover *only* LocalOnly services can
- * accomplish this by inspecting the interfaceIndex of each service reported
- * to their DNSServiceBrowseReply() callback function, and discarding those
- * where the interface index is not kDNSServiceInterfaceIndexLocalOnly.
- */
-
-#define kDNSServiceInterfaceIndexAny 0
-#define kDNSServiceInterfaceIndexLocalOnly ( (uint32_t) -1 )
-
-
-typedef uint32_t DNSServiceFlags;
-typedef int32_t DNSServiceErrorType;
-
-
-/*********************************************************************************************
- *
- * Unix Domain Socket access, DNSServiceRef deallocation, and data processing functions
- *
- *********************************************************************************************/
-
-
-/* DNSServiceRefSockFD()
- *
- * Access underlying Unix domain socket for an initialized DNSServiceRef.
- * The DNS Service Discovery implmementation uses this socket to communicate between
- * the client and the mDNSResponder daemon. The application MUST NOT directly read from
- * or write to this socket. Access to the socket is provided so that it can be used as a
- * run loop source, or in a select() loop: when data is available for reading on the socket,
- * DNSServiceProcessResult() should be called, which will extract the daemon's reply from
- * the socket, and pass it to the appropriate application callback. By using a run loop or
- * select(), results from the daemon can be processed asynchronously. Without using these
- * constructs, DNSServiceProcessResult() will block until the response from the daemon arrives.
- * The client is responsible for ensuring that the data on the socket is processed in a timely
- * fashion - the daemon may terminate its connection with a client that does not clear its
- * socket buffer.
- *
- * sdRef: A DNSServiceRef initialized by any of the DNSService calls.
- *
- * return value: The DNSServiceRef's underlying socket descriptor, or -1 on
- * error.
- */
-
-int DNSSD_API DNSServiceRefSockFD(DNSServiceRef sdRef);
-
-
-/* DNSServiceProcessResult()
- *
- * Read a reply from the daemon, calling the appropriate application callback. This call will
- * block until the daemon's response is received. Use DNSServiceRefSockFD() in
- * conjunction with a run loop or select() to determine the presence of a response from the
- * server before calling this function to process the reply without blocking. Call this function
- * at any point if it is acceptable to block until the daemon's response arrives. Note that the
- * client is responsible for ensuring that DNSServiceProcessResult() is called whenever there is
- * a reply from the daemon - the daemon may terminate its connection with a client that does not
- * process the daemon's responses.
- *
- * sdRef: A DNSServiceRef initialized by any of the DNSService calls
- * that take a callback parameter.
- *
- * return value: Returns kDNSServiceErr_NoError on success, otherwise returns
- * an error code indicating the specific failure that occurred.
- */
-
-DNSServiceErrorType DNSSD_API DNSServiceProcessResult(DNSServiceRef sdRef);
-
-
-/* DNSServiceRefDeallocate()
- *
- * Terminate a connection with the daemon and free memory associated with the DNSServiceRef.
- * Any services or records registered with this DNSServiceRef will be deregistered. Any
- * Browse, Resolve, or Query operations called with this reference will be terminated.
- *
- * Note: If the reference's underlying socket is used in a run loop or select() call, it should
- * be removed BEFORE DNSServiceRefDeallocate() is called, as this function closes the reference's
- * socket.
- *
- * Note: If the reference was initialized with DNSServiceCreateConnection(), any DNSRecordRefs
- * created via this reference will be invalidated by this call - the resource records are
- * deregistered, and their DNSRecordRefs may not be used in subsequent functions. Similarly,
- * if the reference was initialized with DNSServiceRegister, and an extra resource record was
- * added to the service via DNSServiceAddRecord(), the DNSRecordRef created by the Add() call
- * is invalidated when this function is called - the DNSRecordRef may not be used in subsequent
- * functions.
- *
- * Note: This call is to be used only with the DNSServiceRef defined by this API. It is
- * not compatible with dns_service_discovery_ref objects defined in the legacy Mach-based
- * DNSServiceDiscovery.h API.
- *
- * sdRef: A DNSServiceRef initialized by any of the DNSService calls.
- *
- */
-
-void DNSSD_API DNSServiceRefDeallocate(DNSServiceRef sdRef);
-
-
-/*********************************************************************************************
- *
- * Domain Enumeration
- *
- *********************************************************************************************/
-
-/* DNSServiceEnumerateDomains()
- *
- * Asynchronously enumerate domains available for browsing and registration.
- *
- * The enumeration MUST be cancelled via DNSServiceRefDeallocate() when no more domains
- * are to be found.
- *
- * Note that the names returned are (like all of DNS-SD) UTF-8 strings,
- * and are escaped using standard DNS escaping rules.
- * (See "Notes on DNS Name Escaping" earlier in this file for more details.)
- * A graphical browser displaying a hierarchical tree-structured view should cut
- * the names at the bare dots to yield individual labels, then de-escape each
- * label according to the escaping rules, and then display the resulting UTF-8 text.
- *
- * DNSServiceDomainEnumReply Callback Parameters:
- *
- * sdRef: The DNSServiceRef initialized by DNSServiceEnumerateDomains().
- *
- * flags: Possible values are:
- * kDNSServiceFlagsMoreComing
- * kDNSServiceFlagsAdd
- * kDNSServiceFlagsDefault
- *
- * interfaceIndex: Specifies the interface on which the domain exists. (The index for a given
- * interface is determined via the if_nametoindex() family of calls.)
- *
- * errorCode: Will be kDNSServiceErr_NoError (0) on success, otherwise indicates
- * the failure that occurred (other parameters are undefined if errorCode is nonzero).
- *
- * replyDomain: The name of the domain.
- *
- * context: The context pointer passed to DNSServiceEnumerateDomains.
- *
- */
-
-typedef void (DNSSD_API *DNSServiceDomainEnumReply)
- (
- DNSServiceRef sdRef,
- DNSServiceFlags flags,
- uint32_t interfaceIndex,
- DNSServiceErrorType errorCode,
- const char *replyDomain,
- void *context
- );
-
-
-/* DNSServiceEnumerateDomains() Parameters:
- *
- *
- * sdRef: A pointer to an uninitialized DNSServiceRef. If the call succeeds
- * then it initializes the DNSServiceRef, returns kDNSServiceErr_NoError,
- * and the enumeration operation will run indefinitely until the client
- * terminates it by passing this DNSServiceRef to DNSServiceRefDeallocate().
- *
- * flags: Possible values are:
- * kDNSServiceFlagsBrowseDomains to enumerate domains recommended for browsing.
- * kDNSServiceFlagsRegistrationDomains to enumerate domains recommended
- * for registration.
- *
- * interfaceIndex: If non-zero, specifies the interface on which to look for domains.
- * (the index for a given interface is determined via the if_nametoindex()
- * family of calls.) Most applications will pass 0 to enumerate domains on
- * all interfaces. See "Constants for specifying an interface index" for more details.
- *
- * callBack: The function to be called when a domain is found or the call asynchronously
- * fails.
- *
- * context: An application context pointer which is passed to the callback function
- * (may be NULL).
- *
- * return value: Returns kDNSServiceErr_NoError on succeses (any subsequent, asynchronous
- * errors are delivered to the callback), otherwise returns an error code indicating
- * the error that occurred (the callback is not invoked and the DNSServiceRef
- * is not initialized.)
- */
-
-DNSServiceErrorType DNSSD_API DNSServiceEnumerateDomains
- (
- DNSServiceRef *sdRef,
- DNSServiceFlags flags,
- uint32_t interfaceIndex,
- DNSServiceDomainEnumReply callBack,
- void *context /* may be NULL */
- );
-
-
-/*********************************************************************************************
- *
- * Service Registration
- *
- *********************************************************************************************/
-
-/* Register a service that is discovered via Browse() and Resolve() calls.
- *
- *
- * DNSServiceRegisterReply() Callback Parameters:
- *
- * sdRef: The DNSServiceRef initialized by DNSServiceRegister().
- *
- * flags: Currently unused, reserved for future use.
- *
- * errorCode: Will be kDNSServiceErr_NoError on success, otherwise will
- * indicate the failure that occurred (including name conflicts,
- * if the kDNSServiceFlagsNoAutoRename flag was used when registering.)
- * Other parameters are undefined if errorCode is nonzero.
- *
- * name: The service name registered (if the application did not specify a name in
- * DNSServiceRegister(), this indicates what name was automatically chosen).
- *
- * regtype: The type of service registered, as it was passed to the callout.
- *
- * domain: The domain on which the service was registered (if the application did not
- * specify a domain in DNSServiceRegister(), this indicates the default domain
- * on which the service was registered).
- *
- * context: The context pointer that was passed to the callout.
- *
- */
-
-typedef void (DNSSD_API *DNSServiceRegisterReply)
- (
- DNSServiceRef sdRef,
- DNSServiceFlags flags,
- DNSServiceErrorType errorCode,
- const char *name,
- const char *regtype,
- const char *domain,
- void *context
- );
-
-
-/* DNSServiceRegister() Parameters:
- *
- * sdRef: A pointer to an uninitialized DNSServiceRef. If the call succeeds
- * then it initializes the DNSServiceRef, returns kDNSServiceErr_NoError,
- * and the registration will remain active indefinitely until the client
- * terminates it by passing this DNSServiceRef to DNSServiceRefDeallocate().
- *
- * interfaceIndex: If non-zero, specifies the interface on which to register the service
- * (the index for a given interface is determined via the if_nametoindex()
- * family of calls.) Most applications will pass 0 to register on all
- * available interfaces. See "Constants for specifying an interface index" for more details.
- *
- * flags: Indicates the renaming behavior on name conflict (most applications
- * will pass 0). See flag definitions above for details.
- *
- * name: If non-NULL, specifies the service name to be registered.
- * Most applications will not specify a name, in which case the computer
- * name is used (this name is communicated to the client via the callback).
- * If a name is specified, it must be 1-63 bytes of UTF-8 text.
- * If the name is longer than 63 bytes it will be automatically truncated
- * to a legal length, unless the NoAutoRename flag is set,
- * in which case kDNSServiceErr_BadParam will be returned.
- *
- * regtype: The service type followed by the protocol, separated by a dot
- * (e.g. "_ftp._tcp"). The service type must be an underscore, followed
- * by 1-14 characters, which may be letters, digits, or hyphens.
- * The transport protocol must be "_tcp" or "_udp". New service types
- * should be registered at <http://www.dns-sd.org/ServiceTypes.html>.
- *
- * domain: If non-NULL, specifies the domain on which to advertise the service.
- * Most applications will not specify a domain, instead automatically
- * registering in the default domain(s).
- *
- * host: If non-NULL, specifies the SRV target host name. Most applications
- * will not specify a host, instead automatically using the machine's
- * default host name(s). Note that specifying a non-NULL host does NOT
- * create an address record for that host - the application is responsible
- * for ensuring that the appropriate address record exists, or creating it
- * via DNSServiceRegisterRecord().
- *
- * port: The port, in network byte order, on which the service accepts connections.
- * Pass 0 for a "placeholder" service (i.e. a service that will not be discovered
- * by browsing, but will cause a name conflict if another client tries to
- * register that same name). Most clients will not use placeholder services.
- *
- * txtLen: The length of the txtRecord, in bytes. Must be zero if the txtRecord is NULL.
- *
- * txtRecord: The TXT record rdata. A non-NULL txtRecord MUST be a properly formatted DNS
- * TXT record, i.e. <length byte> <data> <length byte> <data> ...
- * Passing NULL for the txtRecord is allowed as a synonym for txtLen=1, txtRecord="",
- * i.e. it creates a TXT record of length one containing a single empty string.
- * RFC 1035 doesn't allow a TXT record to contain *zero* strings, so a single empty
- * string is the smallest legal DNS TXT record.
- *
- * callBack: The function to be called when the registration completes or asynchronously
- * fails. The client MAY pass NULL for the callback - The client will NOT be notified
- * of the default values picked on its behalf, and the client will NOT be notified of any
- * asynchronous errors (e.g. out of memory errors, etc.) that may prevent the registration
- * of the service. The client may NOT pass the NoAutoRename flag if the callback is NULL.
- * The client may still deregister the service at any time via DNSServiceRefDeallocate().
- *
- * context: An application context pointer which is passed to the callback function
- * (may be NULL).
- *
- * return value: Returns kDNSServiceErr_NoError on succeses (any subsequent, asynchronous
- * errors are delivered to the callback), otherwise returns an error code indicating
- * the error that occurred (the callback is never invoked and the DNSServiceRef
- * is not initialized.)
- *
- */
-
-DNSServiceErrorType DNSSD_API DNSServiceRegister
- (
- DNSServiceRef *sdRef,
- DNSServiceFlags flags,
- uint32_t interfaceIndex,
- const char *name, /* may be NULL */
- const char *regtype,
- const char *domain, /* may be NULL */
- const char *host, /* may be NULL */
- uint16_t port,
- uint16_t txtLen,
- const void *txtRecord, /* may be NULL */
- DNSServiceRegisterReply callBack, /* may be NULL */
- void *context /* may be NULL */
- );
-
-
-/* DNSServiceAddRecord()
- *
- * Add a record to a registered service. The name of the record will be the same as the
- * registered service's name.
- * The record can later be updated or deregistered by passing the RecordRef initialized
- * by this function to DNSServiceUpdateRecord() or DNSServiceRemoveRecord().
- *
- *
- * Parameters;
- *
- * sdRef: A DNSServiceRef initialized by DNSServiceRegister().
- *
- * RecordRef: A pointer to an uninitialized DNSRecordRef. Upon succesfull completion of this
- * call, this ref may be passed to DNSServiceUpdateRecord() or DNSServiceRemoveRecord().
- * If the above DNSServiceRef is passed to DNSServiceRefDeallocate(), RecordRef is also
- * invalidated and may not be used further.
- *
- * flags: Currently ignored, reserved for future use.
- *
- * rrtype: The type of the record (e.g. kDNSServiceType_TXT, kDNSServiceType_SRV, etc)
- *
- * rdlen: The length, in bytes, of the rdata.
- *
- * rdata: The raw rdata to be contained in the added resource record.
- *
- * ttl: The time to live of the resource record, in seconds. Pass 0 to use a default value.
- *
- * return value: Returns kDNSServiceErr_NoError on success, otherwise returns an
- * error code indicating the error that occurred (the RecordRef is not initialized).
- */
-
-DNSServiceErrorType DNSSD_API DNSServiceAddRecord
- (
- DNSServiceRef sdRef,
- DNSRecordRef *RecordRef,
- DNSServiceFlags flags,
- uint16_t rrtype,
- uint16_t rdlen,
- const void *rdata,
- uint32_t ttl
- );
-
-
-/* DNSServiceUpdateRecord
- *
- * Update a registered resource record. The record must either be:
- * - The primary txt record of a service registered via DNSServiceRegister()
- * - A record added to a registered service via DNSServiceAddRecord()
- * - An individual record registered by DNSServiceRegisterRecord()
- *
- *
- * Parameters:
- *
- * sdRef: A DNSServiceRef that was initialized by DNSServiceRegister()
- * or DNSServiceCreateConnection().
- *
- * RecordRef: A DNSRecordRef initialized by DNSServiceAddRecord, or NULL to update the
- * service's primary txt record.
- *
- * flags: Currently ignored, reserved for future use.
- *
- * rdlen: The length, in bytes, of the new rdata.
- *
- * rdata: The new rdata to be contained in the updated resource record.
- *
- * ttl: The time to live of the updated resource record, in seconds.
- *
- * return value: Returns kDNSServiceErr_NoError on success, otherwise returns an
- * error code indicating the error that occurred.
- */
-
-DNSServiceErrorType DNSSD_API DNSServiceUpdateRecord
- (
- DNSServiceRef sdRef,
- DNSRecordRef RecordRef, /* may be NULL */
- DNSServiceFlags flags,
- uint16_t rdlen,
- const void *rdata,
- uint32_t ttl
- );
-
-
-/* DNSServiceRemoveRecord
- *
- * Remove a record previously added to a service record set via DNSServiceAddRecord(), or deregister
- * an record registered individually via DNSServiceRegisterRecord().
- *
- * Parameters:
- *
- * sdRef: A DNSServiceRef initialized by DNSServiceRegister() (if the
- * record being removed was registered via DNSServiceAddRecord()) or by
- * DNSServiceCreateConnection() (if the record being removed was registered via
- * DNSServiceRegisterRecord()).
- *
- * recordRef: A DNSRecordRef initialized by a successful call to DNSServiceAddRecord()
- * or DNSServiceRegisterRecord().
- *
- * flags: Currently ignored, reserved for future use.
- *
- * return value: Returns kDNSServiceErr_NoError on success, otherwise returns an
- * error code indicating the error that occurred.
- */
-
-DNSServiceErrorType DNSSD_API DNSServiceRemoveRecord
- (
- DNSServiceRef sdRef,
- DNSRecordRef RecordRef,
- DNSServiceFlags flags
- );
-
-
-/*********************************************************************************************
- *
- * Service Discovery
- *
- *********************************************************************************************/
-
-/* Browse for instances of a service.
- *
- *
- * DNSServiceBrowseReply() Parameters:
- *
- * sdRef: The DNSServiceRef initialized by DNSServiceBrowse().
- *
- * flags: Possible values are kDNSServiceFlagsMoreComing and kDNSServiceFlagsAdd.
- * See flag definitions for details.
- *
- * interfaceIndex: The interface on which the service is advertised. This index should
- * be passed to DNSServiceResolve() when resolving the service.
- *
- * errorCode: Will be kDNSServiceErr_NoError (0) on success, otherwise will
- * indicate the failure that occurred. Other parameters are undefined if
- * the errorCode is nonzero.
- *
- * serviceName: The discovered service name. This name should be displayed to the user,
- * and stored for subsequent use in the DNSServiceResolve() call.
- *
- * regtype: The service type, which is usually (but not always) the same as was passed
- * to DNSServiceBrowse(). One case where the discovered service type may
- * not be the same as the requested service type is when using subtypes:
- * The client may want to browse for only those ftp servers that allow
- * anonymous connections. The client will pass the string "_ftp._tcp,_anon"
- * to DNSServiceBrowse(), but the type of the service that's discovered
- * is simply "_ftp._tcp". The regtype for each discovered service instance
- * should be stored along with the name, so that it can be passed to
- * DNSServiceResolve() when the service is later resolved.
- *
- * domain: The domain of the discovered service instance. This may or may not be the
- * same as the domain that was passed to DNSServiceBrowse(). The domain for each
- * discovered service instance should be stored along with the name, so that
- * it can be passed to DNSServiceResolve() when the service is later resolved.
- *
- * context: The context pointer that was passed to the callout.
- *
- */
-
-typedef void (DNSSD_API *DNSServiceBrowseReply)
- (
- DNSServiceRef sdRef,
- DNSServiceFlags flags,
- uint32_t interfaceIndex,
- DNSServiceErrorType errorCode,
- const char *serviceName,
- const char *regtype,
- const char *replyDomain,
- void *context
- );
-
-
-/* DNSServiceBrowse() Parameters:
- *
- * sdRef: A pointer to an uninitialized DNSServiceRef. If the call succeeds
- * then it initializes the DNSServiceRef, returns kDNSServiceErr_NoError,
- * and the browse operation will run indefinitely until the client
- * terminates it by passing this DNSServiceRef to DNSServiceRefDeallocate().
- *
- * flags: Currently ignored, reserved for future use.
- *
- * interfaceIndex: If non-zero, specifies the interface on which to browse for services
- * (the index for a given interface is determined via the if_nametoindex()
- * family of calls.) Most applications will pass 0 to browse on all available
- * interfaces. See "Constants for specifying an interface index" for more details.
- *
- * regtype: The service type being browsed for followed by the protocol, separated by a
- * dot (e.g. "_ftp._tcp"). The transport protocol must be "_tcp" or "_udp".
- *
- * domain: If non-NULL, specifies the domain on which to browse for services.
- * Most applications will not specify a domain, instead browsing on the
- * default domain(s).
- *
- * callBack: The function to be called when an instance of the service being browsed for
- * is found, or if the call asynchronously fails.
- *
- * context: An application context pointer which is passed to the callback function
- * (may be NULL).
- *
- * return value: Returns kDNSServiceErr_NoError on succeses (any subsequent, asynchronous
- * errors are delivered to the callback), otherwise returns an error code indicating
- * the error that occurred (the callback is not invoked and the DNSServiceRef
- * is not initialized.)
- */
-
-DNSServiceErrorType DNSSD_API DNSServiceBrowse
- (
- DNSServiceRef *sdRef,
- DNSServiceFlags flags,
- uint32_t interfaceIndex,
- const char *regtype,
- const char *domain, /* may be NULL */
- DNSServiceBrowseReply callBack,
- void *context /* may be NULL */
- );
-
-
-/* DNSServiceResolve()
- *
- * Resolve a service name discovered via DNSServiceBrowse() to a target host name, port number, and
- * txt record.
- *
- * Note: Applications should NOT use DNSServiceResolve() solely for txt record monitoring - use
- * DNSServiceQueryRecord() instead, as it is more efficient for this task.
- *
- * Note: When the desired results have been returned, the client MUST terminate the resolve by calling
- * DNSServiceRefDeallocate().
- *
- * Note: DNSServiceResolve() behaves correctly for typical services that have a single SRV record
- * and a single TXT record. To resolve non-standard services with multiple SRV or TXT records,
- * DNSServiceQueryRecord() should be used.
- *
- * DNSServiceResolveReply Callback Parameters:
- *
- * sdRef: The DNSServiceRef initialized by DNSServiceResolve().
- *
- * flags: Currently unused, reserved for future use.
- *
- * interfaceIndex: The interface on which the service was resolved.
- *
- * errorCode: Will be kDNSServiceErr_NoError (0) on success, otherwise will
- * indicate the failure that occurred. Other parameters are undefined if
- * the errorCode is nonzero.
- *
- * fullname: The full service domain name, in the form <servicename>.<protocol>.<domain>.
- * (This name is escaped following standard DNS rules, making it suitable for
- * passing to standard system DNS APIs such as res_query(), or to the
- * special-purpose functions included in this API that take fullname parameters.
- * See "Notes on DNS Name Escaping" earlier in this file for more details.)
- *
- * hosttarget: The target hostname of the machine providing the service. This name can
- * be passed to functions like gethostbyname() to identify the host's IP address.
- *
- * port: The port, in network byte order, on which connections are accepted for this service.
- *
- * txtLen: The length of the txt record, in bytes.
- *
- * txtRecord: The service's primary txt record, in standard txt record format.
- *
-
- * context: The context pointer that was passed to the callout.
- *
- */
-
-typedef void (DNSSD_API *DNSServiceResolveReply)
- (
- DNSServiceRef sdRef,
- DNSServiceFlags flags,
- uint32_t interfaceIndex,
- DNSServiceErrorType errorCode,
- const char *fullname,
- const char *hosttarget,
- uint16_t port,
- uint16_t txtLen,
- const char *txtRecord,
- void *context
- );
-
-
-/* DNSServiceResolve() Parameters
- *
- * sdRef: A pointer to an uninitialized DNSServiceRef. If the call succeeds
- * then it initializes the DNSServiceRef, returns kDNSServiceErr_NoError,
- * and the resolve operation will run indefinitely until the client
- * terminates it by passing this DNSServiceRef to DNSServiceRefDeallocate().
- *
- * flags: Currently ignored, reserved for future use.
- *
- * interfaceIndex: The interface on which to resolve the service. If this resolve call is
- * as a result of a currently active DNSServiceBrowse() operation, then the
- * interfaceIndex should be the index reported in the DNSServiceBrowseReply
- * callback. If this resolve call is using information previously saved
- * (e.g. in a preference file) for later use, then use interfaceIndex 0, because
- * the desired service may now be reachable via a different physical interface.
- * See "Constants for specifying an interface index" for more details.
- *
- * name: The name of the service instance to be resolved, as reported to the
- * DNSServiceBrowseReply() callback.
- *
- * regtype: The type of the service instance to be resolved, as reported to the
- * DNSServiceBrowseReply() callback.
- *
- * domain: The domain of the service instance to be resolved, as reported to the
- * DNSServiceBrowseReply() callback.
- *
- * callBack: The function to be called when a result is found, or if the call
- * asynchronously fails.
- *
- * context: An application context pointer which is passed to the callback function
- * (may be NULL).
- *
- * return value: Returns kDNSServiceErr_NoError on succeses (any subsequent, asynchronous
- * errors are delivered to the callback), otherwise returns an error code indicating
- * the error that occurred (the callback is never invoked and the DNSServiceRef
- * is not initialized.)
- */
-
-DNSServiceErrorType DNSSD_API DNSServiceResolve
- (
- DNSServiceRef *sdRef,
- DNSServiceFlags flags,
- uint32_t interfaceIndex,
- const char *name,
- const char *regtype,
- const char *domain,
- DNSServiceResolveReply callBack,
- void *context /* may be NULL */
- );
-
-
-/*********************************************************************************************
- *
- * Special Purpose Calls (most applications will not use these)
- *
- *********************************************************************************************/
-
-/* DNSServiceCreateConnection()
- *
- * Create a connection to the daemon allowing efficient registration of
- * multiple individual records.
- *
- *
- * Parameters:
- *
- * sdRef: A pointer to an uninitialized DNSServiceRef. Deallocating
- * the reference (via DNSServiceRefDeallocate()) severs the
- * connection and deregisters all records registered on this connection.
- *
- * return value: Returns kDNSServiceErr_NoError on success, otherwise returns
- * an error code indicating the specific failure that occurred (in which
- * case the DNSServiceRef is not initialized).
- */
-
-DNSServiceErrorType DNSSD_API DNSServiceCreateConnection(DNSServiceRef *sdRef);
-
-
-/* DNSServiceRegisterRecord
- *
- * Register an individual resource record on a connected DNSServiceRef.
- *
- * Note that name conflicts occurring for records registered via this call must be handled
- * by the client in the callback.
- *
- *
- * DNSServiceRegisterRecordReply() parameters:
- *
- * sdRef: The connected DNSServiceRef initialized by
- * DNSServiceDiscoveryConnect().
- *
- * RecordRef: The DNSRecordRef initialized by DNSServiceRegisterRecord(). If the above
- * DNSServiceRef is passed to DNSServiceRefDeallocate(), this DNSRecordRef is
- * invalidated, and may not be used further.
- *
- * flags: Currently unused, reserved for future use.
- *
- * errorCode: Will be kDNSServiceErr_NoError on success, otherwise will
- * indicate the failure that occurred (including name conflicts.)
- * Other parameters are undefined if errorCode is nonzero.
- *
- * context: The context pointer that was passed to the callout.
- *
- */
-
- typedef void (DNSSD_API *DNSServiceRegisterRecordReply)
- (
- DNSServiceRef sdRef,
- DNSRecordRef RecordRef,
- DNSServiceFlags flags,
- DNSServiceErrorType errorCode,
- void *context
- );
-
-
-/* DNSServiceRegisterRecord() Parameters:
- *
- * sdRef: A DNSServiceRef initialized by DNSServiceCreateConnection().
- *
- * RecordRef: A pointer to an uninitialized DNSRecordRef. Upon succesfull completion of this
- * call, this ref may be passed to DNSServiceUpdateRecord() or DNSServiceRemoveRecord().
- * (To deregister ALL records registered on a single connected DNSServiceRef
- * and deallocate each of their corresponding DNSServiceRecordRefs, call
- * DNSServiceRefDealloocate()).
- *
- * flags: Possible values are kDNSServiceFlagsShared or kDNSServiceFlagsUnique
- * (see flag type definitions for details).
- *
- * interfaceIndex: If non-zero, specifies the interface on which to register the record
- * (the index for a given interface is determined via the if_nametoindex()
- * family of calls.) Passing 0 causes the record to be registered on all interfaces.
- * See "Constants for specifying an interface index" for more details.
- *
- * fullname: The full domain name of the resource record.
- *
- * rrtype: The numerical type of the resource record (e.g. kDNSServiceType_PTR, kDNSServiceType_SRV, etc)
- *
- * rrclass: The class of the resource record (usually kDNSServiceClass_IN)
- *
- * rdlen: Length, in bytes, of the rdata.
- *
- * rdata: A pointer to the raw rdata, as it is to appear in the DNS record.
- *
- * ttl: The time to live of the resource record, in seconds. Pass 0 to use a default value.
- *
- * callBack: The function to be called when a result is found, or if the call
- * asynchronously fails (e.g. because of a name conflict.)
- *
- * context: An application context pointer which is passed to the callback function
- * (may be NULL).
- *
- * return value: Returns kDNSServiceErr_NoError on succeses (any subsequent, asynchronous
- * errors are delivered to the callback), otherwise returns an error code indicating
- * the error that occurred (the callback is never invoked and the DNSRecordRef is
- * not initialized.)
- */
-
-DNSServiceErrorType DNSSD_API DNSServiceRegisterRecord
- (
- DNSServiceRef sdRef,
- DNSRecordRef *RecordRef,
- DNSServiceFlags flags,
- uint32_t interfaceIndex,
- const char *fullname,
- uint16_t rrtype,
- uint16_t rrclass,
- uint16_t rdlen,
- const void *rdata,
- uint32_t ttl,
- DNSServiceRegisterRecordReply callBack,
- void *context /* may be NULL */
- );
-
-
-/* DNSServiceQueryRecord
- *
- * Query for an arbitrary DNS record.
- *
- *
- * DNSServiceQueryRecordReply() Callback Parameters:
- *
- * sdRef: The DNSServiceRef initialized by DNSServiceQueryRecord().
- *
- * flags: Possible values are kDNSServiceFlagsMoreComing and
- * kDNSServiceFlagsAdd. The Add flag is NOT set for PTR records
- * with a ttl of 0, i.e. "Remove" events.
- *
- * interfaceIndex: The interface on which the query was resolved (the index for a given
- * interface is determined via the if_nametoindex() family of calls).
- * See "Constants for specifying an interface index" for more details.
- *
- * errorCode: Will be kDNSServiceErr_NoError on success, otherwise will
- * indicate the failure that occurred. Other parameters are undefined if
- * errorCode is nonzero.
- *
- * fullname: The resource record's full domain name.
- *
- * rrtype: The resource record's type (e.g. kDNSServiceType_PTR, kDNSServiceType_SRV, etc)
- *
- * rrclass: The class of the resource record (usually kDNSServiceClass_IN).
- *
- * rdlen: The length, in bytes, of the resource record rdata.
- *
- * rdata: The raw rdata of the resource record.
- *
- * ttl: The resource record's time to live, in seconds.
- *
- * context: The context pointer that was passed to the callout.
- *
- */
-
-typedef void (DNSSD_API *DNSServiceQueryRecordReply)
- (
- DNSServiceRef DNSServiceRef,
- DNSServiceFlags flags,
- uint32_t interfaceIndex,
- DNSServiceErrorType errorCode,
- const char *fullname,
- uint16_t rrtype,
- uint16_t rrclass,
- uint16_t rdlen,
- const void *rdata,
- uint32_t ttl,
- void *context
- );
-
-
-/* DNSServiceQueryRecord() Parameters:
- *
- * sdRef: A pointer to an uninitialized DNSServiceRef. If the call succeeds
- * then it initializes the DNSServiceRef, returns kDNSServiceErr_NoError,
- * and the query operation will run indefinitely until the client
- * terminates it by passing this DNSServiceRef to DNSServiceRefDeallocate().
- *
- * flags: Pass kDNSServiceFlagsLongLivedQuery to create a "long-lived" unicast
- * query in a non-local domain. Without setting this flag, unicast queries
- * will be one-shot - that is, only answers available at the time of the call
- * will be returned. By setting this flag, answers (including Add and Remove
- * events) that become available after the initial call is made will generate
- * callbacks. This flag has no effect on link-local multicast queries.
- *
- * interfaceIndex: If non-zero, specifies the interface on which to issue the query
- * (the index for a given interface is determined via the if_nametoindex()
- * family of calls.) Passing 0 causes the name to be queried for on all
- * interfaces. See "Constants for specifying an interface index" for more details.
- *
- * fullname: The full domain name of the resource record to be queried for.
- *
- * rrtype: The numerical type of the resource record to be queried for
- * (e.g. kDNSServiceType_PTR, kDNSServiceType_SRV, etc)
- *
- * rrclass: The class of the resource record (usually kDNSServiceClass_IN).
- *
- * callBack: The function to be called when a result is found, or if the call
- * asynchronously fails.
- *
- * context: An application context pointer which is passed to the callback function
- * (may be NULL).
- *
- * return value: Returns kDNSServiceErr_NoError on succeses (any subsequent, asynchronous
- * errors are delivered to the callback), otherwise returns an error code indicating
- * the error that occurred (the callback is never invoked and the DNSServiceRef
- * is not initialized.)
- */
-
-DNSServiceErrorType DNSSD_API DNSServiceQueryRecord
- (
- DNSServiceRef *sdRef,
- DNSServiceFlags flags,
- uint32_t interfaceIndex,
- const char *fullname,
- uint16_t rrtype,
- uint16_t rrclass,
- DNSServiceQueryRecordReply callBack,
- void *context /* may be NULL */
- );
-
-
-/* DNSServiceReconfirmRecord
- *
- * Instruct the daemon to verify the validity of a resource record that appears to
- * be out of date (e.g. because tcp connection to a service's target failed.)
- * Causes the record to be flushed from the daemon's cache (as well as all other
- * daemons' caches on the network) if the record is determined to be invalid.
- *
- * Parameters:
- *
- * flags: Currently unused, reserved for future use.
- *
- * interfaceIndex: If non-zero, specifies the interface of the record in question.
- * Passing 0 causes all instances of this record to be reconfirmed.
- *
- * fullname: The resource record's full domain name.
- *
- * rrtype: The resource record's type (e.g. kDNSServiceType_PTR, kDNSServiceType_SRV, etc)
- *
- * rrclass: The class of the resource record (usually kDNSServiceClass_IN).
- *
- * rdlen: The length, in bytes, of the resource record rdata.
- *
- * rdata: The raw rdata of the resource record.
- *
- */
-
-void DNSSD_API DNSServiceReconfirmRecord
- (
- DNSServiceFlags flags,
- uint32_t interfaceIndex,
- const char *fullname,
- uint16_t rrtype,
- uint16_t rrclass,
- uint16_t rdlen,
- const void *rdata
- );
-
-
-/*********************************************************************************************
- *
- * General Utility Functions
- *
- *********************************************************************************************/
-
-/* DNSServiceConstructFullName()
- *
- * Concatenate a three-part domain name (as returned by the above callbacks) into a
- * properly-escaped full domain name. Note that callbacks in the above functions ALREADY ESCAPE
- * strings where necessary.
- *
- * Parameters:
- *
- * fullName: A pointer to a buffer that where the resulting full domain name is to be written.
- * The buffer must be kDNSServiceMaxDomainName (1005) bytes in length to
- * accommodate the longest legal domain name without buffer overrun.
- *
- * service: The service name - any dots or backslashes must NOT be escaped.
- * May be NULL (to construct a PTR record name, e.g.
- * "_ftp._tcp.apple.com.").
- *
- * regtype: The service type followed by the protocol, separated by a dot
- * (e.g. "_ftp._tcp").
- *
- * domain: The domain name, e.g. "apple.com.". Literal dots or backslashes,
- * if any, must be escaped, e.g. "1st\. Floor.apple.com."
- *
- * return value: Returns 0 on success, -1 on error.
- *
- */
-
-int DNSSD_API DNSServiceConstructFullName
- (
- char *fullName,
- const char *service, /* may be NULL */
- const char *regtype,
- const char *domain
- );
-
-
-/*********************************************************************************************
- *
- * TXT Record Construction Functions
- *
- *********************************************************************************************/
-
-/*
- * A typical calling sequence for TXT record construction is something like:
- *
- * Client allocates storage for TXTRecord data (e.g. declare buffer on the stack)
- * TXTRecordCreate();
- * TXTRecordSetValue();
- * TXTRecordSetValue();
- * TXTRecordSetValue();
- * ...
- * DNSServiceRegister( ... TXTRecordGetLength(), TXTRecordGetBytesPtr() ... );
- * TXTRecordDeallocate();
- * Explicitly deallocate storage for TXTRecord data (if not allocated on the stack)
- */
-
-
-/* TXTRecordRef
- *
- * Opaque internal data type.
- * Note: Represents a DNS-SD TXT record.
- */
-
-typedef struct _TXTRecordRef_t { char privatedata[16]; } TXTRecordRef;
-
-
-/* TXTRecordCreate()
- *
- * Creates a new empty TXTRecordRef referencing the specified storage.
- *
- * If the buffer parameter is NULL, or the specified storage size is not
- * large enough to hold a key subsequently added using TXTRecordSetValue(),
- * then additional memory will be added as needed using malloc().
- *
- * On some platforms, when memory is low, malloc() may fail. In this
- * case, TXTRecordSetValue() will return kDNSServiceErr_NoMemory, and this
- * error condition will need to be handled as appropriate by the caller.
- *
- * You can avoid the need to handle this error condition if you ensure
- * that the storage you initially provide is large enough to hold all
- * the key/value pairs that are to be added to the record.
- * The caller can precompute the exact length required for all of the
- * key/value pairs to be added, or simply provide a fixed-sized buffer
- * known in advance to be large enough.
- * A no-value (key-only) key requires (1 + key length) bytes.
- * A key with empty value requires (1 + key length + 1) bytes.
- * A key with non-empty value requires (1 + key length + 1 + value length).
- * For most applications, DNS-SD TXT records are generally
- * less than 100 bytes, so in most cases a simple fixed-sized
- * 256-byte buffer will be more than sufficient.
- * Recommended size limits for DNS-SD TXT Records are discussed in
- * <http://files.dns-sd.org/draft-cheshire-dnsext-dns-sd.txt>
- *
- * Note: When passing parameters to and from these TXT record APIs,
- * the key name does not include the '=' character. The '=' character
- * is the separator between the key and value in the on-the-wire
- * packet format; it is not part of either the key or the value.
- *
- * txtRecord: A pointer to an uninitialized TXTRecordRef.
- *
- * bufferLen: The size of the storage provided in the "buffer" parameter.
- *
- * buffer: Optional caller-supplied storage used to hold the TXTRecord data.
- * This storage must remain valid for as long as
- * the TXTRecordRef.
- */
-
-void DNSSD_API TXTRecordCreate
- (
- TXTRecordRef *txtRecord,
- uint16_t bufferLen,
- void *buffer
- );
-
-
-/* TXTRecordDeallocate()
- *
- * Releases any resources allocated in the course of preparing a TXT Record
- * using TXTRecordCreate()/TXTRecordSetValue()/TXTRecordRemoveValue().
- * Ownership of the buffer provided in TXTRecordCreate() returns to the client.
- *
- * txtRecord: A TXTRecordRef initialized by calling TXTRecordCreate().
- *
- */
-
-void DNSSD_API TXTRecordDeallocate
- (
- TXTRecordRef *txtRecord
- );
-
-
-/* TXTRecordSetValue()
- *
- * Adds a key (optionally with value) to a TXTRecordRef. If the "key" already
- * exists in the TXTRecordRef, then the current value will be replaced with
- * the new value.
- * Keys may exist in four states with respect to a given TXT record:
- * - Absent (key does not appear at all)
- * - Present with no value ("key" appears alone)
- * - Present with empty value ("key=" appears in TXT record)
- * - Present with non-empty value ("key=value" appears in TXT record)
- * For more details refer to "Data Syntax for DNS-SD TXT Records" in
- * <http://files.dns-sd.org/draft-cheshire-dnsext-dns-sd.txt>
- *
- * txtRecord: A TXTRecordRef initialized by calling TXTRecordCreate().
- *
- * key: A null-terminated string which only contains printable ASCII
- * values (0x20-0x7E), excluding '=' (0x3D). Keys should be
- * 8 characters or less (not counting the terminating null).
- *
- * valueSize: The size of the value.
- *
- * value: Any binary value. For values that represent
- * textual data, UTF-8 is STRONGLY recommended.
- * For values that represent textual data, valueSize
- * should NOT include the terminating null (if any)
- * at the end of the string.
- * If NULL, then "key" will be added with no value.
- * If non-NULL but valueSize is zero, then "key=" will be
- * added with empty value.
- *
- * return value: Returns kDNSServiceErr_NoError on success.
- * Returns kDNSServiceErr_Invalid if the "key" string contains
- * illegal characters.
- * Returns kDNSServiceErr_NoMemory if adding this key would
- * exceed the available storage.
- */
-
-DNSServiceErrorType DNSSD_API TXTRecordSetValue
- (
- TXTRecordRef *txtRecord,
- const char *key,
- uint8_t valueSize, /* may be zero */
- const void *value /* may be NULL */
- );
-
-
-/* TXTRecordRemoveValue()
- *
- * Removes a key from a TXTRecordRef. The "key" must be an
- * ASCII string which exists in the TXTRecordRef.
- *
- * txtRecord: A TXTRecordRef initialized by calling TXTRecordCreate().
- *
- * key: A key name which exists in the TXTRecordRef.
- *
- * return value: Returns kDNSServiceErr_NoError on success.
- * Returns kDNSServiceErr_NoSuchKey if the "key" does not
- * exist in the TXTRecordRef.
- *
- */
-
-DNSServiceErrorType DNSSD_API TXTRecordRemoveValue
- (
- TXTRecordRef *txtRecord,
- const char *key
- );
-
-
-/* TXTRecordGetLength()
- *
- * Allows you to determine the length of the raw bytes within a TXTRecordRef.
- *
- * txtRecord: A TXTRecordRef initialized by calling TXTRecordCreate().
- *
- * return value: Returns the size of the raw bytes inside a TXTRecordRef
- * which you can pass directly to DNSServiceRegister() or
- * to DNSServiceUpdateRecord().
- * Returns 0 if the TXTRecordRef is empty.
- *
- */
-
-uint16_t DNSSD_API TXTRecordGetLength
- (
- const TXTRecordRef *txtRecord
- );
-
-
-/* TXTRecordGetBytesPtr()
- *
- * Allows you to retrieve a pointer to the raw bytes within a TXTRecordRef.
- *
- * txtRecord: A TXTRecordRef initialized by calling TXTRecordCreate().
- *
- * return value: Returns a pointer to the raw bytes inside the TXTRecordRef
- * which you can pass directly to DNSServiceRegister() or
- * to DNSServiceUpdateRecord().
- *
- */
-
-const void * DNSSD_API TXTRecordGetBytesPtr
- (
- const TXTRecordRef *txtRecord
- );
-
-
-/*********************************************************************************************
- *
- * TXT Record Parsing Functions
- *
- *********************************************************************************************/
-
-/*
- * A typical calling sequence for TXT record parsing is something like:
- *
- * Receive TXT record data in DNSServiceResolve() callback
- * if (TXTRecordContainsKey(txtLen, txtRecord, "key")) then do something
- * val1ptr = TXTRecordGetValuePtr(txtLen, txtRecord, "key1", &len1);
- * val2ptr = TXTRecordGetValuePtr(txtLen, txtRecord, "key2", &len2);
- * ...
- * bcopy(val1ptr, myval1, len1);
- * bcopy(val2ptr, myval2, len2);
- * ...
- * return;
- *
- * If you wish to retain the values after return from the DNSServiceResolve()
- * callback, then you need to copy the data to your own storage using bcopy()
- * or similar, as shown in the example above.
- *
- * If for some reason you need to parse a TXT record you built yourself
- * using the TXT record construction functions above, then you can do
- * that using TXTRecordGetLength and TXTRecordGetBytesPtr calls:
- * TXTRecordGetValue(TXTRecordGetLength(x), TXTRecordGetBytesPtr(x), key, &len);
- *
- * Most applications only fetch keys they know about from a TXT record and
- * ignore the rest.
- * However, some debugging tools wish to fetch and display all keys.
- * To do that, use the TXTRecordGetCount() and TXTRecordGetItemAtIndex() calls.
- */
-
-/* TXTRecordContainsKey()
- *
- * Allows you to determine if a given TXT Record contains a specified key.
- *
- * txtLen: The size of the received TXT Record.
- *
- * txtRecord: Pointer to the received TXT Record bytes.
- *
- * key: A null-terminated ASCII string containing the key name.
- *
- * return value: Returns 1 if the TXT Record contains the specified key.
- * Otherwise, it returns 0.
- *
- */
-
-int DNSSD_API TXTRecordContainsKey
- (
- uint16_t txtLen,
- const void *txtRecord,
- const char *key
- );
-
-
-/* TXTRecordGetValuePtr()
- *
- * Allows you to retrieve the value for a given key from a TXT Record.
- *
- * txtLen: The size of the received TXT Record
- *
- * txtRecord: Pointer to the received TXT Record bytes.
- *
- * key: A null-terminated ASCII string containing the key name.
- *
- * valueLen: On output, will be set to the size of the "value" data.
- *
- * return value: Returns NULL if the key does not exist in this TXT record,
- * or exists with no value (to differentiate between
- * these two cases use TXTRecordContainsKey()).
- * Returns pointer to location within TXT Record bytes
- * if the key exists with empty or non-empty value.
- * For empty value, valueLen will be zero.
- * For non-empty value, valueLen will be length of value data.
- */
-
-const void * DNSSD_API TXTRecordGetValuePtr
- (
- uint16_t txtLen,
- const void *txtRecord,
- const char *key,
- uint8_t *valueLen
- );
-
-
-/* TXTRecordGetCount()
- *
- * Returns the number of keys stored in the TXT Record. The count
- * can be used with TXTRecordGetItemAtIndex() to iterate through the keys.
- *
- * txtLen: The size of the received TXT Record.
- *
- * txtRecord: Pointer to the received TXT Record bytes.
- *
- * return value: Returns the total number of keys in the TXT Record.
- *
- */
-
-uint16_t DNSSD_API TXTRecordGetCount
- (
- uint16_t txtLen,
- const void *txtRecord
- );
-
-
-/* TXTRecordGetItemAtIndex()
- *
- * Allows you to retrieve a key name and value pointer, given an index into
- * a TXT Record. Legal index values range from zero to TXTRecordGetCount()-1.
- * It's also possible to iterate through keys in a TXT record by simply
- * calling TXTRecordGetItemAtIndex() repeatedly, beginning with index zero
- * and increasing until TXTRecordGetItemAtIndex() returns kDNSServiceErr_Invalid.
- *
- * On return:
- * For keys with no value, *value is set to NULL and *valueLen is zero.
- * For keys with empty value, *value is non-NULL and *valueLen is zero.
- * For keys with non-empty value, *value is non-NULL and *valueLen is non-zero.
- *
- * txtLen: The size of the received TXT Record.
- *
- * txtRecord: Pointer to the received TXT Record bytes.
- *
- * index: An index into the TXT Record.
- *
- * keyBufLen: The size of the string buffer being supplied.
- *
- * key: A string buffer used to store the key name.
- * On return, the buffer contains a null-terminated C string
- * giving the key name. DNS-SD TXT keys are usually
- * 8 characters or less. To hold the maximum possible
- * key name, the buffer should be 256 bytes long.
- *
- * valueLen: On output, will be set to the size of the "value" data.
- *
- * value: On output, *value is set to point to location within TXT
- * Record bytes that holds the value data.
- *
- * return value: Returns kDNSServiceErr_NoError on success.
- * Returns kDNSServiceErr_NoMemory if keyBufLen is too short.
- * Returns kDNSServiceErr_Invalid if index is greater than
- * TXTRecordGetCount()-1.
- */
-
-DNSServiceErrorType DNSSD_API TXTRecordGetItemAtIndex
- (
- uint16_t txtLen,
- const void *txtRecord,
- uint16_t index,
- uint16_t keyBufLen,
- char *key,
- uint8_t *valueLen,
- const void **value
- );
-
-#ifdef __APPLE_API_PRIVATE
-
-/*
- * Mac OS X specific functionality
- * 3rd party clients of this API should not depend on future support or availability of this routine
- */
-
-/* DNSServiceSetDefaultDomainForUser()
- *
- * Set the default domain for the caller's UID. Future browse and registration
- * calls by this user that do not specify an explicit domain will browse and
- * register in this wide-area domain in addition to .local. In addition, this
- * domain will be returned as a Browse domain via domain enumeration calls.
- *
- *
- * Parameters:
- *
- * flags: Pass kDNSServiceFlagsAdd to add a domain for a user. Call without
- * this flag set to clear a previously added domain.
- *
- * domain: The domain to be used for the caller's UID.
- *
- * return value: Returns kDNSServiceErr_NoError on succeses, otherwise returns
- * an error code indicating the error that occurred
- */
-
-DNSServiceErrorType DNSSD_API DNSServiceSetDefaultDomainForUser
- (
- DNSServiceFlags flags,
- const char *domain
- );
-
-#endif //__APPLE_API_PRIVATE
-
-#ifdef __cplusplus
- }
-#endif
-
-#endif /* _DNS_SD_H */
projects / catta / commitdiff