+++ /dev/null
-/***
- 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 <fcntl.h>
-
-#include <sys/types.h>
-#include <sys/socket.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 <avahi-client/publish.h>
-#include <avahi-client/lookup.h>
-
-#include "warn.h"
-#include "dns_sd.h"
-
-enum {
- COMMAND_POLL = 'p',
- COMMAND_QUIT = 'q',
- COMMAND_POLL_DONE = 'P',
- COMMAND_POLL_FAILED = 'F'
-};
-
-struct type_info {
- char *type;
- AvahiStringList *subtypes;
- int n_subtypes;
-};
-
-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;
- DNSServiceQueryRecordReply query_resolver_callback;
-
- AvahiClient *client;
- AvahiServiceBrowser *service_browser;
- AvahiServiceResolver *service_resolver;
- AvahiDomainBrowser *domain_browser;
- AvahiRecordBrowser *record_browser;
-
- struct type_info type_info;
- char *service_name, *service_name_chosen, *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:
- case AVAHI_ERR_INVALID_SERVICE_SUBTYPE:
- return kDNSServiceErr_BadParam;
-
-
- case AVAHI_ERR_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_DISCONNECTED:
- case AVAHI_ERR_NO_DAEMON:
- break;
-
- }
-
- return kDNSServiceErr_Unknown;
-}
-
-static void type_info_init(struct type_info *i) {
- assert(i);
- i->type = NULL;
- i->subtypes = NULL;
- i->n_subtypes = 0;
-}
-
-static void type_info_free(struct type_info *i) {
- assert(i);
-
- avahi_free(i->type);
- avahi_string_list_free(i->subtypes);
-
- type_info_init(i);
-}
-
-static int type_info_parse(struct type_info *i, const char *t) {
- char *token = NULL;
-
- assert(i);
- assert(t);
-
- type_info_init(i);
-
- for (;;) {
- size_t l;
-
- if (*t == 0)
- break;
-
- l = strcspn(t, ",");
-
- if (l <= 0)
- goto fail;
-
- token = avahi_strndup(t, l);
-
- if (!token)
- goto fail;
-
- if (!i->type) {
- /* This is the first token, hence the main type */
-
- if (!avahi_is_valid_service_type_strict(token))
- goto fail;
-
- i->type = token;
- token = NULL;
- } else {
- char *fst;
-
- /* This is not the first token, hence a subtype */
-
- if (!(fst = avahi_strdup_printf("%s._sub.%s", token, i->type)))
- goto fail;
-
- if (!avahi_is_valid_service_subtype(fst)) {
- avahi_free(fst);
- goto fail;
- }
-
- i->subtypes = avahi_string_list_add(i->subtypes, fst);
- avahi_free(fst);
-
- avahi_free(token);
- token = NULL;
-
- i->n_subtypes++;
- }
-
- t += l;
-
- if (*t == ',')
- t++;
- }
-
- if (i->type)
- return 0;
-
-fail:
- type_info_free(i);
- avahi_free(token);
- return -1;
-}
-
-static const char *add_trailing_dot(const char *s, char *buf, size_t buf_len) {
- if (!s)
- return NULL;
-
- if (*s == 0)
- return s;
-
- if (s[strlen(s)-1] == '.')
- return s;
-
- snprintf(buf, buf_len, "%s.", s);
- return buf;
-}
-
-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: {
- int ret;
-
- ASSERT_SUCCESS(pthread_mutex_lock(&sdref->mutex));
-
- for (;;) {
- errno = 0;
-
- if ((ret = avahi_simple_poll_run(sdref->simple_poll)) < 0) {
-
- if (errno == EINTR)
- continue;
-
- fprintf(stderr, __FILE__": avahi_simple_poll_run() failed: %s\n", strerror(errno));
- }
-
- break;
- }
-
- ASSERT_SUCCESS(pthread_mutex_unlock(&sdref->mutex));
-
- if (write_command(sdref->thread_fd, ret < 0 ? COMMAND_POLL_FAILED : COMMAND_POLL_DONE) < 0)
- break;
-
- 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_domain = sdref->service_host = NULL;
- sdref->service_txt = NULL;
-
- type_info_init(&sdref->type_info);
-
- ASSERT_SUCCESS(pthread_mutexattr_init(&mutex_attr));
- pthread_mutexattr_settype(&mutex_attr, PTHREAD_MUTEX_RECURSIVE);
- ASSERT_SUCCESS(pthread_mutex_init(&sdref->mutex, &mutex_attr));
-
- 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 an initial 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) {
- ASSERT_SUCCESS(write_command(sdref->main_fd, COMMAND_QUIT));
- avahi_simple_poll_wakeup(sdref->simple_poll);
- ASSERT_SUCCESS(pthread_join(sdref->thread, NULL));
- }
-
- if (sdref->client)
- avahi_client_free(sdref->client);
-
- if (sdref->simple_poll)
- avahi_simple_poll_free(sdref->simple_poll);
-
- if (sdref->thread_fd >= 0)
- close(sdref->thread_fd);
-
- if (sdref->main_fd >= 0)
- close(sdref->main_fd);
-
- ASSERT_SUCCESS(pthread_mutex_destroy(&sdref->mutex));
-
- avahi_free(sdref->service_name);
- avahi_free(sdref->service_name_chosen);
- avahi_free(sdref->service_domain);
- avahi_free(sdref->service_host);
-
- type_info_free(&sdref->type_info);
-
- 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) {
-
- AVAHI_WARN_LINKAGE;
-
- if (!sdref || sdref->n_ref <= 0)
- return -1;
-
- return sdref->main_fd;
-}
-
-DNSServiceErrorType DNSSD_API DNSServiceProcessResult(DNSServiceRef sdref) {
- DNSServiceErrorType ret = kDNSServiceErr_Unknown;
-
- AVAHI_WARN_LINKAGE;
-
- if (!sdref || sdref->n_ref <= 0)
- return kDNSServiceErr_BadParam;
-
- sdref_ref(sdref);
-
- ASSERT_SUCCESS(pthread_mutex_lock(&sdref->mutex));
-
- /* Cleanup notification socket */
- if (read_command(sdref->main_fd) != COMMAND_POLL_DONE)
- 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) {
- AVAHI_WARN_LINKAGE;
-
- if (sdref)
- sdref_unref(sdref);
-}
-
-static void service_browser_callback(
- AvahiServiceBrowser *b,
- AvahiIfIndex interface,
- AVAHI_GCC_UNUSED AvahiProtocol protocol,
- AvahiBrowserEvent event,
- const char *name,
- const char *type,
- const char *domain,
- AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
- void *userdata) {
-
- DNSServiceRef sdref = userdata;
- char type_fixed[AVAHI_DOMAIN_NAME_MAX], domain_fixed[AVAHI_DOMAIN_NAME_MAX];
- assert(b);
- assert(sdref);
- assert(sdref->n_ref >= 1);
-
- type = add_trailing_dot(type, type_fixed, sizeof(type_fixed));
- domain = add_trailing_dot(domain, domain_fixed, sizeof(domain_fixed));
-
- 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, map_error(avahi_client_errno(sdref->client)), 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;
- int error = kDNSServiceErr_Unknown;
-
- assert(s);
- assert(sdref);
- assert(sdref->n_ref >= 1);
-
- switch (state) {
-
- case AVAHI_CLIENT_FAILURE:
-
- if (sdref->service_browser_callback)
- sdref->service_browser_callback(sdref, 0, 0, error, NULL, NULL, NULL, sdref->context);
- else if (sdref->service_resolver_callback)
- sdref->service_resolver_callback(sdref, 0, 0, error, NULL, NULL, 0, 0, NULL, sdref->context);
- else if (sdref->domain_browser_callback)
- sdref->domain_browser_callback(sdref, 0, 0, error, NULL, sdref->context);
- else if (sdref->query_resolver_callback)
- sdref->query_resolver_callback(sdref, 0, 0, error, NULL, 0, 0, 0, NULL, 0, sdref->context);
-
- break;
-
- case AVAHI_CLIENT_S_RUNNING:
- case AVAHI_CLIENT_S_COLLISION:
- case AVAHI_CLIENT_S_REGISTERING:
- case AVAHI_CLIENT_CONNECTING:
- 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;
- struct type_info type_info;
-
- AVAHI_WARN_LINKAGE;
-
- if (!ret_sdref || !regtype)
- return kDNSServiceErr_BadParam;
- *ret_sdref = NULL;
-
- if (interface == kDNSServiceInterfaceIndexLocalOnly || flags != 0) {
- AVAHI_WARN_UNSUPPORTED;
- return kDNSServiceErr_Unsupported;
- }
-
- type_info_init(&type_info);
-
- if (type_info_parse(&type_info, regtype) < 0 || type_info.n_subtypes > 1) {
- type_info_free(&type_info);
-
- if (!avahi_is_valid_service_type_generic(regtype))
- return kDNSServiceErr_Unsupported;
- } else
- regtype = type_info.subtypes ? (char*) type_info.subtypes->text : type_info.type;
-
- if (!(sdref = sdref_new())) {
- type_info_free(&type_info);
- 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), 0, 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);
-
- type_info_free(&type_info);
-
- return ret;
-}
-
-static void service_resolver_callback(
- AvahiServiceResolver *r,
- AvahiIfIndex interface,
- AVAHI_GCC_UNUSED AvahiProtocol protocol,
- AvahiResolverEvent event,
- const char *name,
- const char *type,
- const char *domain,
- const char *host_name,
- AVAHI_GCC_UNUSED const AvahiAddress *a,
- uint16_t port,
- AvahiStringList *txt,
- AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
- void *userdata) {
-
- DNSServiceRef sdref = userdata;
-
- assert(r);
- assert(sdref);
- assert(sdref->n_ref >= 1);
-
- switch (event) {
- case AVAHI_RESOLVER_FOUND: {
-
- char host_name_fixed[AVAHI_DOMAIN_NAME_MAX];
- char full_name[AVAHI_DOMAIN_NAME_MAX];
- int ret;
- char *p = NULL;
- size_t l = 0;
-
- host_name = add_trailing_dot(host_name, host_name_fixed, sizeof(host_name_fixed));
-
- 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_join(full_name, sizeof(full_name), name, type, domain);
- assert(ret == AVAHI_OK);
-
- strcat(full_name, ".");
-
- sdref->service_resolver_callback(sdref, 0, interface, kDNSServiceErr_NoError, full_name, host_name, htons(port), l, (unsigned char*) p, sdref->context);
-
- avahi_free(p);
- break;
- }
-
- case AVAHI_RESOLVER_FAILURE:
- sdref->service_resolver_callback(sdref, 0, interface, map_error(avahi_client_errno(sdref->client)), NULL, NULL, 0, 0, NULL, sdref->context);
- break;
- }
-}
-
-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;
-
- if (!ret_sdref || !name || !regtype || !domain || !callback)
- return kDNSServiceErr_BadParam;
- *ret_sdref = NULL;
-
- if (interface == kDNSServiceInterfaceIndexLocalOnly || flags != 0) {
- AVAHI_WARN_UNSUPPORTED;
- 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), 0, 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;
-
- if (!fullName || !regtype || !domain)
- return -1;
-
- if (avahi_service_name_join(fullName, kDNSServiceMaxDomainName, service, regtype, domain) < 0)
- return -1;
-
- return 0;
-}
-
-static void domain_browser_callback(
- AvahiDomainBrowser *b,
- AvahiIfIndex interface,
- AVAHI_GCC_UNUSED AvahiProtocol protocol,
- AvahiBrowserEvent event,
- const char *domain,
- AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
- void *userdata) {
-
- DNSServiceRef sdref = userdata;
- static char domain_fixed[AVAHI_DOMAIN_NAME_MAX];
-
- assert(b);
- assert(sdref);
- assert(sdref->n_ref >= 1);
-
- domain = add_trailing_dot(domain, domain_fixed, sizeof(domain_fixed));
-
- 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, map_error(avahi_client_errno(sdref->client)), 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;
-
- if (!ret_sdref || !callback)
- return kDNSServiceErr_BadParam;
- *ret_sdref = NULL;
-
- if (interface == kDNSServiceInterfaceIndexLocalOnly ||
- (flags != kDNSServiceFlagsBrowseDomains && flags != kDNSServiceFlagsRegistrationDomains)) {
- AVAHI_WARN_UNSUPPORTED;
- 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), 0, 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, "local",
- 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) {
- char regtype_fixed[AVAHI_DOMAIN_NAME_MAX], domain_fixed[AVAHI_DOMAIN_NAME_MAX];
- const char *regtype, *domain;
- assert(sdref);
- assert(sdref->n_ref >= 1);
-
- if (!sdref->service_register_callback)
- return;
-
- regtype = add_trailing_dot(sdref->type_info.type, regtype_fixed, sizeof(regtype_fixed));
- domain = add_trailing_dot(sdref->service_domain, domain_fixed, sizeof(domain_fixed));
-
- sdref->service_register_callback(
- sdref, 0, error,
- sdref->service_name_chosen ? sdref->service_name_chosen : sdref->service_name,
- regtype,
- domain,
- sdref->context);
-}
-
-static int reg_create_service(DNSServiceRef sdref) {
- int ret;
- AvahiStringList *l;
-
- 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->type_info.type,
- sdref->service_domain,
- sdref->service_host,
- sdref->service_port,
- sdref->service_txt)) < 0)
- return ret;
-
- for (l = sdref->type_info.subtypes; l; l = l->next) {
- /* Create a subtype entry */
-
- if (avahi_entry_group_add_service_subtype(
- sdref->entry_group,
- sdref->service_interface,
- AVAHI_PROTO_UNSPEC,
- 0,
- sdref->service_name_chosen,
- sdref->type_info.type,
- sdref->service_domain,
- (const char*) l->text) < 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_FAILURE:
- reg_report_error(sdref, kDNSServiceErr_Unknown);
- 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);
- sdref->service_name_chosen = NULL;
-
- 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;
- }
- }
-
- if (!sdref->service_name_chosen) {
-
- assert(sdref->service_name);
-
- if (!(sdref->service_name_chosen = avahi_strdup(sdref->service_name))) {
- 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:
- case AVAHI_CLIENT_S_REGISTERING:
-
- /* Remove our entry */
- avahi_entry_group_reset(sdref->entry_group);
-
- break;
-
- case AVAHI_CLIENT_CONNECTING:
- /* 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;
-
- case AVAHI_ENTRY_GROUP_FAILURE:
- /* Inform the user */
- reg_report_error(sdref, map_error(avahi_client_errno(sdref->client)));
- 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;
- AvahiStringList *txt = NULL;
- struct type_info type_info;
-
- AVAHI_WARN_LINKAGE;
-
- if (!ret_sdref || !regtype)
- return kDNSServiceErr_BadParam;
- *ret_sdref = NULL;
-
- if (!txtRecord) {
- txtLen = 1;
- txtRecord = "";
- }
-
- if (interface == kDNSServiceInterfaceIndexLocalOnly || flags) {
- AVAHI_WARN_UNSUPPORTED;
- return kDNSServiceErr_Unsupported;
- }
-
- if (txtLen > 0)
- if (avahi_string_list_parse(txtRecord, txtLen, &txt) < 0)
- return kDNSServiceErr_Invalid;
-
- if (type_info_parse(&type_info, regtype) < 0) {
- avahi_string_list_free(txt);
- return kDNSServiceErr_Invalid;
- }
-
- if (!(sdref = sdref_new())) {
- avahi_string_list_free(txt);
- type_info_free(&type_info);
- return kDNSServiceErr_Unknown;
- }
-
- sdref->context = context;
- sdref->service_register_callback = callback;
-
- sdref->type_info = type_info;
- sdref->service_name = avahi_strdup(name);
- sdref->service_domain = domain ? avahi_normalize_name_strdup(domain) : NULL;
- sdref->service_host = host ? avahi_normalize_name_strdup(host) : NULL;
- sdref->service_interface = interface == kDNSServiceInterfaceIndexAny ? AVAHI_IF_UNSPEC : (AvahiIfIndex) interface;
- sdref->service_port = ntohs(port);
- sdref->service_txt = txt;
-
- /* Some OOM checking would be cool here */
-
- ASSERT_SUCCESS(pthread_mutex_lock(&sdref->mutex));
-
- if (!(sdref->client = avahi_client_new(avahi_simple_poll_get(sdref->simple_poll), 0, 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;
-}
-
-DNSServiceErrorType DNSSD_API DNSServiceUpdateRecord(
- DNSServiceRef sdref,
- DNSRecordRef rref,
- DNSServiceFlags flags,
- uint16_t rdlen,
- const void *rdata,
- AVAHI_GCC_UNUSED uint32_t ttl) {
-
- int ret = kDNSServiceErr_Unknown;
- AvahiStringList *txt = NULL;
-
- AVAHI_WARN_LINKAGE;
-
- if (!sdref || sdref->n_ref <= 0)
- return kDNSServiceErr_BadParam;
-
- if (flags || rref) {
- AVAHI_WARN_UNSUPPORTED;
- return kDNSServiceErr_Unsupported;
- }
-
- if (rdlen > 0)
- if (avahi_string_list_parse(rdata, rdlen, &txt) < 0)
- return kDNSServiceErr_Invalid;
-
- ASSERT_SUCCESS(pthread_mutex_lock(&sdref->mutex));
-
- if (!avahi_string_list_equal(txt, sdref->service_txt)) {
-
- avahi_string_list_free(sdref->service_txt);
- sdref->service_txt = txt;
-
- if (avahi_client_get_state(sdref->client) == AVAHI_CLIENT_S_RUNNING &&
- sdref->entry_group &&
- (avahi_entry_group_get_state(sdref->entry_group) == AVAHI_ENTRY_GROUP_ESTABLISHED ||
- avahi_entry_group_get_state(sdref->entry_group) == AVAHI_ENTRY_GROUP_REGISTERING))
-
- if (avahi_entry_group_update_service_txt_strlst(
- sdref->entry_group,
- sdref->service_interface,
- AVAHI_PROTO_UNSPEC,
- 0,
- sdref->service_name_chosen,
- sdref->type_info.type,
- sdref->service_domain,
- sdref->service_txt) < 0) {
-
- ret = map_error(avahi_client_errno(sdref->client));
- goto finish;
- }
-
- } else
- avahi_string_list_free(txt);
-
- ret = kDNSServiceErr_NoError;
-
-finish:
- ASSERT_SUCCESS(pthread_mutex_unlock(&sdref->mutex));
-
- return ret;
-}
-
-static void query_resolver_callback(
- AvahiRecordBrowser *r,
- AvahiIfIndex interface,
- AVAHI_GCC_UNUSED AvahiProtocol protocol,
- AvahiBrowserEvent event,
- const char *name,
- uint16_t clazz,
- uint16_t type,
- const void* rdata,
- size_t size,
- AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
- void *userdata) {
-
- DNSServiceRef sdref = userdata;
-
- assert(r);
- assert(sdref);
- assert(sdref->n_ref >= 1);
-
- switch (event) {
-
- case AVAHI_BROWSER_NEW:
- case AVAHI_BROWSER_REMOVE: {
-
- DNSServiceFlags qflags = 0;
- if (event == AVAHI_BROWSER_NEW)
- qflags |= kDNSServiceFlagsAdd;
-
- sdref->query_resolver_callback(sdref, qflags, interface, kDNSServiceErr_NoError, name, type, clazz, size, rdata, 0, sdref->context);
- break;
- }
-
- case AVAHI_BROWSER_ALL_FOR_NOW:
- case AVAHI_BROWSER_CACHE_EXHAUSTED:
- /* not implemented */
- break;
-
- case AVAHI_BROWSER_FAILURE:
- sdref->query_resolver_callback(sdref, 0, interface, map_error(avahi_client_errno(sdref->client)), NULL, 0, 0, 0, NULL, 0, sdref->context);
- break;
- }
-}
-
-DNSServiceErrorType DNSSD_API DNSServiceQueryRecord (
- DNSServiceRef *ret_sdref,
- DNSServiceFlags flags,
- uint32_t interface,
- const char *fullname,
- uint16_t type,
- uint16_t clazz,
- DNSServiceQueryRecordReply callback,
- void *context) {
-
- DNSServiceErrorType ret = kDNSServiceErr_Unknown;
- int error;
- DNSServiceRef sdref = NULL;
- AvahiIfIndex ifindex;
-
- AVAHI_WARN_LINKAGE;
-
- if (!ret_sdref || !fullname)
- return kDNSServiceErr_BadParam;
- *ret_sdref = NULL;
-
- if (interface == kDNSServiceInterfaceIndexLocalOnly || flags != 0) {
- AVAHI_WARN_UNSUPPORTED;
- return kDNSServiceErr_Unsupported;
- }
-
- if (!(sdref = sdref_new()))
- return kDNSServiceErr_Unknown;
-
- sdref->context = context;
- sdref->query_resolver_callback = callback;
-
- ASSERT_SUCCESS(pthread_mutex_lock(&sdref->mutex));
-
- if (!(sdref->client = avahi_client_new(avahi_simple_poll_get(sdref->simple_poll), 0, generic_client_callback, sdref, &error))) {
- ret = map_error(error);
- goto finish;
- }
-
- ifindex = interface == kDNSServiceInterfaceIndexAny ? AVAHI_IF_UNSPEC : (AvahiIfIndex) interface;
-
- if (!(sdref->record_browser = avahi_record_browser_new(sdref->client, ifindex, AVAHI_PROTO_UNSPEC, fullname, clazz, type, 0, query_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;
-}
projects / catta / blobdiff