+++ /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 <string.h>
-#include <unistd.h>
-#include <errno.h>
-#include <stdio.h>
-#include <assert.h>
-#include <stdlib.h>
-
-#include <arpa/inet.h>
-
-#include <sys/utsname.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-
-#include <avahi-common/domain.h>
-#include <avahi-common/timeval.h>
-#include <avahi-common/malloc.h>
-#include <avahi-common/error.h>
-#include <avahi-common/domain.h>
-
-#include "internal.h"
-#include "iface.h"
-#include "socket.h"
-#include "browse.h"
-#include "log.h"
-#include "util.h"
-#include "dns-srv-rr.h"
-#include "rr-util.h"
-#include "domain-util.h"
-
-static void transport_flags_from_domain(AvahiServer *s, AvahiPublishFlags *flags, const char *domain) {
- assert(flags);
- assert(domain);
-
- assert(!((*flags & AVAHI_PUBLISH_USE_MULTICAST) && (*flags & AVAHI_PUBLISH_USE_WIDE_AREA)));
-
- if (*flags & (AVAHI_PUBLISH_USE_MULTICAST|AVAHI_PUBLISH_USE_WIDE_AREA))
- return;
-
- if (!s->wide_area_lookup_engine ||
- !avahi_wide_area_has_servers(s->wide_area_lookup_engine) ||
- avahi_domain_ends_with(domain, AVAHI_MDNS_SUFFIX_LOCAL) ||
- avahi_domain_ends_with(domain, AVAHI_MDNS_SUFFIX_ADDR_IPV4) ||
- avahi_domain_ends_with(domain, AVAHI_MDNS_SUFFIX_ADDR_IPV6))
- *flags |= AVAHI_PUBLISH_USE_MULTICAST;
- else
- *flags |= AVAHI_PUBLISH_USE_WIDE_AREA;
-}
-
-void avahi_entry_free(AvahiServer*s, AvahiEntry *e) {
- AvahiEntry *t;
-
- assert(s);
- assert(e);
-
- avahi_goodbye_entry(s, e, 1, 1);
-
- /* Remove from linked list */
- AVAHI_LLIST_REMOVE(AvahiEntry, entries, s->entries, e);
-
- /* Remove from hash table indexed by name */
- t = avahi_hashmap_lookup(s->entries_by_key, e->record->key);
- AVAHI_LLIST_REMOVE(AvahiEntry, by_key, t, e);
- if (t)
- avahi_hashmap_replace(s->entries_by_key, t->record->key, t);
- else
- avahi_hashmap_remove(s->entries_by_key, e->record->key);
-
- /* Remove from associated group */
- if (e->group)
- AVAHI_LLIST_REMOVE(AvahiEntry, by_group, e->group->entries, e);
-
- avahi_record_unref(e->record);
- avahi_free(e);
-}
-
-void avahi_entry_group_free(AvahiServer *s, AvahiSEntryGroup *g) {
- assert(s);
- assert(g);
-
- while (g->entries)
- avahi_entry_free(s, g->entries);
-
- if (g->register_time_event)
- avahi_time_event_free(g->register_time_event);
-
- AVAHI_LLIST_REMOVE(AvahiSEntryGroup, groups, s->groups, g);
- avahi_free(g);
-}
-
-void avahi_cleanup_dead_entries(AvahiServer *s) {
- assert(s);
-
- if (s->need_group_cleanup) {
- AvahiSEntryGroup *g, *next;
-
- for (g = s->groups; g; g = next) {
- next = g->groups_next;
-
- if (g->dead)
- avahi_entry_group_free(s, g);
- }
-
- s->need_group_cleanup = 0;
- }
-
- if (s->need_entry_cleanup) {
- AvahiEntry *e, *next;
-
- for (e = s->entries; e; e = next) {
- next = e->entries_next;
-
- if (e->dead)
- avahi_entry_free(s, e);
- }
-
- s->need_entry_cleanup = 0;
- }
-
- if (s->need_browser_cleanup)
- avahi_browser_cleanup(s);
-
- if (s->cleanup_time_event) {
- avahi_time_event_free(s->cleanup_time_event);
- s->cleanup_time_event = NULL;
- }
-}
-
-static int check_record_conflict(AvahiServer *s, AvahiIfIndex interface, AvahiProtocol protocol, AvahiRecord *r, AvahiPublishFlags flags) {
- AvahiEntry *e;
-
- assert(s);
- assert(r);
-
- for (e = avahi_hashmap_lookup(s->entries_by_key, r->key); e; e = e->by_key_next) {
- if (e->dead)
- continue;
-
- if (!(flags & AVAHI_PUBLISH_UNIQUE) && !(e->flags & AVAHI_PUBLISH_UNIQUE))
- continue;
-
- if ((flags & AVAHI_PUBLISH_ALLOW_MULTIPLE) && (e->flags & AVAHI_PUBLISH_ALLOW_MULTIPLE) )
- continue;
-
- if (avahi_record_equal_no_ttl(r, e->record)) {
- /* The records are the same, not a conflict in any case */
- continue;
- }
-
- if ((interface <= 0 ||
- e->interface <= 0 ||
- e->interface == interface) &&
- (protocol == AVAHI_PROTO_UNSPEC ||
- e->protocol == AVAHI_PROTO_UNSPEC ||
- e->protocol == protocol))
-
- return -1;
- }
-
- return 0;
-}
-
-static AvahiEntry * server_add_internal(
- AvahiServer *s,
- AvahiSEntryGroup *g,
- AvahiIfIndex interface,
- AvahiProtocol protocol,
- AvahiPublishFlags flags,
- AvahiRecord *r) {
-
- AvahiEntry *e;
-
- assert(s);
- assert(r);
-
- AVAHI_CHECK_VALIDITY_RETURN_NULL(s, s->state != AVAHI_SERVER_FAILURE && s->state != AVAHI_SERVER_INVALID, AVAHI_ERR_BAD_STATE);
- AVAHI_CHECK_VALIDITY_RETURN_NULL(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
- AVAHI_CHECK_VALIDITY_RETURN_NULL(s, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL);
- AVAHI_CHECK_VALIDITY_RETURN_NULL(s, AVAHI_FLAGS_VALID(
- flags,
- AVAHI_PUBLISH_NO_ANNOUNCE|
- AVAHI_PUBLISH_NO_PROBE|
- AVAHI_PUBLISH_UNIQUE|
- AVAHI_PUBLISH_ALLOW_MULTIPLE|
- AVAHI_PUBLISH_UPDATE|
- AVAHI_PUBLISH_USE_WIDE_AREA|
- AVAHI_PUBLISH_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS);
- AVAHI_CHECK_VALIDITY_RETURN_NULL(s, avahi_is_valid_domain_name(r->key->name), AVAHI_ERR_INVALID_HOST_NAME);
- AVAHI_CHECK_VALIDITY_RETURN_NULL(s, r->ttl != 0, AVAHI_ERR_INVALID_TTL);
- AVAHI_CHECK_VALIDITY_RETURN_NULL(s, !avahi_key_is_pattern(r->key), AVAHI_ERR_IS_PATTERN);
- AVAHI_CHECK_VALIDITY_RETURN_NULL(s, avahi_record_is_valid(r), AVAHI_ERR_INVALID_RECORD);
- AVAHI_CHECK_VALIDITY_RETURN_NULL(s, r->key->clazz == AVAHI_DNS_CLASS_IN, AVAHI_ERR_INVALID_DNS_CLASS);
- AVAHI_CHECK_VALIDITY_RETURN_NULL(s,
- (r->key->type != 0) &&
- (r->key->type != AVAHI_DNS_TYPE_ANY) &&
- (r->key->type != AVAHI_DNS_TYPE_OPT) &&
- (r->key->type != AVAHI_DNS_TYPE_TKEY) &&
- (r->key->type != AVAHI_DNS_TYPE_TSIG) &&
- (r->key->type != AVAHI_DNS_TYPE_IXFR) &&
- (r->key->type != AVAHI_DNS_TYPE_AXFR), AVAHI_ERR_INVALID_DNS_TYPE);
-
- transport_flags_from_domain(s, &flags, r->key->name);
- AVAHI_CHECK_VALIDITY_RETURN_NULL(s, flags & AVAHI_PUBLISH_USE_MULTICAST, AVAHI_ERR_NOT_SUPPORTED);
- AVAHI_CHECK_VALIDITY_RETURN_NULL(s, !s->config.disable_publishing, AVAHI_ERR_NOT_PERMITTED);
- AVAHI_CHECK_VALIDITY_RETURN_NULL(s,
- !g ||
- (g->state != AVAHI_ENTRY_GROUP_ESTABLISHED && g->state != AVAHI_ENTRY_GROUP_REGISTERING) ||
- (flags & AVAHI_PUBLISH_UPDATE), AVAHI_ERR_BAD_STATE);
-
- if (flags & AVAHI_PUBLISH_UPDATE) {
- AvahiRecord *old_record;
- int is_first = 1;
-
- /* Update and existing record */
-
- /* Find the first matching entry */
- for (e = avahi_hashmap_lookup(s->entries_by_key, r->key); e; e = e->by_key_next) {
- if (!e->dead && e->group == g && e->interface == interface && e->protocol == protocol)
- break;
-
- is_first = 0;
- }
-
- /* Hmm, nothing found? */
- if (!e) {
- avahi_server_set_errno(s, AVAHI_ERR_NOT_FOUND);
- return NULL;
- }
-
- /* Update the entry */
- old_record = e->record;
- e->record = avahi_record_ref(r);
- e->flags = flags;
-
- /* Announce our changes when needed */
- if (!avahi_record_equal_no_ttl(old_record, r) && (!g || g->state != AVAHI_ENTRY_GROUP_UNCOMMITED)) {
-
- /* Remove the old entry from all caches, if needed */
- if (!(e->flags & AVAHI_PUBLISH_UNIQUE))
- avahi_goodbye_entry(s, e, 1, 0);
-
- /* Reannounce our updated entry */
- avahi_reannounce_entry(s, e);
- }
-
- /* If we were the first entry in the list, we need to update the key */
- if (is_first)
- avahi_hashmap_replace(s->entries_by_key, e->record->key, e);
-
- avahi_record_unref(old_record);
-
- } else {
- AvahiEntry *t;
-
- /* Add a new record */
-
- if (check_record_conflict(s, interface, protocol, r, flags) < 0) {
- avahi_server_set_errno(s, AVAHI_ERR_COLLISION);
- return NULL;
- }
-
- if (!(e = avahi_new(AvahiEntry, 1))) {
- avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
- return NULL;
- }
-
- e->server = s;
- e->record = avahi_record_ref(r);
- e->group = g;
- e->interface = interface;
- e->protocol = protocol;
- e->flags = flags;
- e->dead = 0;
-
- AVAHI_LLIST_HEAD_INIT(AvahiAnnouncer, e->announcers);
-
- AVAHI_LLIST_PREPEND(AvahiEntry, entries, s->entries, e);
-
- /* Insert into hash table indexed by name */
- t = avahi_hashmap_lookup(s->entries_by_key, e->record->key);
- AVAHI_LLIST_PREPEND(AvahiEntry, by_key, t, e);
- avahi_hashmap_replace(s->entries_by_key, e->record->key, t);
-
- /* Insert into group list */
- if (g)
- AVAHI_LLIST_PREPEND(AvahiEntry, by_group, g->entries, e);
-
- avahi_announce_entry(s, e);
- }
-
- return e;
-}
-
-int avahi_server_add(
- AvahiServer *s,
- AvahiSEntryGroup *g,
- AvahiIfIndex interface,
- AvahiProtocol protocol,
- AvahiPublishFlags flags,
- AvahiRecord *r) {
-
- if (!server_add_internal(s, g, interface, protocol, flags, r))
- return avahi_server_errno(s);
-
- return AVAHI_OK;
-}
-
-const AvahiRecord *avahi_server_iterate(AvahiServer *s, AvahiSEntryGroup *g, void **state) {
- AvahiEntry **e = (AvahiEntry**) state;
- assert(s);
- assert(e);
-
- if (!*e)
- *e = g ? g->entries : s->entries;
-
- while (*e && (*e)->dead)
- *e = g ? (*e)->by_group_next : (*e)->entries_next;
-
- if (!*e)
- return NULL;
-
- return avahi_record_ref((*e)->record);
-}
-
-int avahi_server_dump(AvahiServer *s, AvahiDumpCallback callback, void* userdata) {
- AvahiEntry *e;
-
- assert(s);
- assert(callback);
-
- callback(";;; ZONE DUMP FOLLOWS ;;;", userdata);
-
- for (e = s->entries; e; e = e->entries_next) {
- char *t;
- char ln[256];
-
- if (e->dead)
- continue;
-
- if (!(t = avahi_record_to_string(e->record)))
- return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
-
- snprintf(ln, sizeof(ln), "%s ; iface=%i proto=%i", t, e->interface, e->protocol);
- avahi_free(t);
-
- callback(ln, userdata);
- }
-
- avahi_dump_caches(s->monitor, callback, userdata);
-
- if (s->wide_area_lookup_engine)
- avahi_wide_area_cache_dump(s->wide_area_lookup_engine, callback, userdata);
- return AVAHI_OK;
-}
-
-static AvahiEntry *server_add_ptr_internal(
- AvahiServer *s,
- AvahiSEntryGroup *g,
- AvahiIfIndex interface,
- AvahiProtocol protocol,
- AvahiPublishFlags flags,
- uint32_t ttl,
- const char *name,
- const char *dest) {
-
- AvahiRecord *r;
- AvahiEntry *e;
-
- assert(s);
- assert(dest);
-
- AVAHI_CHECK_VALIDITY_RETURN_NULL(s, !name || avahi_is_valid_domain_name(name), AVAHI_ERR_INVALID_HOST_NAME);
- AVAHI_CHECK_VALIDITY_RETURN_NULL(s, avahi_is_valid_domain_name(dest), AVAHI_ERR_INVALID_HOST_NAME);
-
- if (!name)
- name = s->host_name_fqdn;
-
- if (!(r = avahi_record_new_full(name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_PTR, ttl))) {
- avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
- return NULL;
- }
-
- r->data.ptr.name = avahi_normalize_name_strdup(dest);
- e = server_add_internal(s, g, interface, protocol, flags, r);
- avahi_record_unref(r);
- return e;
-}
-
-int avahi_server_add_ptr(
- AvahiServer *s,
- AvahiSEntryGroup *g,
- AvahiIfIndex interface,
- AvahiProtocol protocol,
- AvahiPublishFlags flags,
- uint32_t ttl,
- const char *name,
- const char *dest) {
-
- AvahiEntry *e;
-
- assert(s);
-
- if (!(e = server_add_ptr_internal(s, g, interface, protocol, flags, ttl, name, dest)))
- return avahi_server_errno(s);
-
- return AVAHI_OK;
-}
-
-int avahi_server_add_address(
- AvahiServer *s,
- AvahiSEntryGroup *g,
- AvahiIfIndex interface,
- AvahiProtocol protocol,
- AvahiPublishFlags flags,
- const char *name,
- AvahiAddress *a) {
-
- char n[AVAHI_DOMAIN_NAME_MAX];
- int ret = AVAHI_OK;
- AvahiEntry *entry = NULL, *reverse = NULL;
- AvahiRecord *r;
-
- assert(s);
- assert(a);
-
- AVAHI_CHECK_VALIDITY(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
- AVAHI_CHECK_VALIDITY(s, AVAHI_PROTO_VALID(protocol) && AVAHI_PROTO_VALID(a->proto), AVAHI_ERR_INVALID_PROTOCOL);
- AVAHI_CHECK_VALIDITY(s, AVAHI_FLAGS_VALID(flags,
- AVAHI_PUBLISH_NO_REVERSE|
- AVAHI_PUBLISH_NO_ANNOUNCE|
- AVAHI_PUBLISH_NO_PROBE|
- AVAHI_PUBLISH_UPDATE|
- AVAHI_PUBLISH_USE_WIDE_AREA|
- AVAHI_PUBLISH_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS);
- AVAHI_CHECK_VALIDITY(s, !name || avahi_is_valid_fqdn(name), AVAHI_ERR_INVALID_HOST_NAME);
-
- /* Prepare the host naem */
-
- if (!name)
- name = s->host_name_fqdn;
- else {
- AVAHI_ASSERT_TRUE(avahi_normalize_name(name, n, sizeof(n)));
- name = n;
- }
-
- transport_flags_from_domain(s, &flags, name);
- AVAHI_CHECK_VALIDITY(s, flags & AVAHI_PUBLISH_USE_MULTICAST, AVAHI_ERR_NOT_SUPPORTED);
-
- /* Create the A/AAAA record */
-
- if (a->proto == AVAHI_PROTO_INET) {
-
- if (!(r = avahi_record_new_full(name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_A, AVAHI_DEFAULT_TTL_HOST_NAME))) {
- ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
- goto finish;
- }
-
- r->data.a.address = a->data.ipv4;
-
- } else {
- assert(a->proto == AVAHI_PROTO_INET6);
-
- if (!(r = avahi_record_new_full(name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_AAAA, AVAHI_DEFAULT_TTL_HOST_NAME))) {
- ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
- goto finish;
- }
-
- r->data.aaaa.address = a->data.ipv6;
- }
-
- entry = server_add_internal(s, g, interface, protocol, (flags & ~ AVAHI_PUBLISH_NO_REVERSE) | AVAHI_PUBLISH_UNIQUE | AVAHI_PUBLISH_ALLOW_MULTIPLE, r);
- avahi_record_unref(r);
-
- if (!entry) {
- ret = avahi_server_errno(s);
- goto finish;
- }
-
- /* Create the reverse lookup entry */
-
- if (!(flags & AVAHI_PUBLISH_NO_REVERSE)) {
- char reverse_n[AVAHI_DOMAIN_NAME_MAX];
- avahi_reverse_lookup_name(a, reverse_n, sizeof(reverse_n));
-
- if (!(reverse = server_add_ptr_internal(s, g, interface, protocol, flags | AVAHI_PUBLISH_UNIQUE, AVAHI_DEFAULT_TTL_HOST_NAME, reverse_n, name))) {
- ret = avahi_server_errno(s);
- goto finish;
- }
- }
-
-finish:
-
- if (ret != AVAHI_OK && !(flags & AVAHI_PUBLISH_UPDATE)) {
- if (entry)
- avahi_entry_free(s, entry);
- if (reverse)
- avahi_entry_free(s, reverse);
- }
-
- return ret;
-}
-
-static AvahiEntry *server_add_txt_strlst_nocopy(
- AvahiServer *s,
- AvahiSEntryGroup *g,
- AvahiIfIndex interface,
- AvahiProtocol protocol,
- AvahiPublishFlags flags,
- uint32_t ttl,
- const char *name,
- AvahiStringList *strlst) {
-
- AvahiRecord *r;
- AvahiEntry *e;
-
- assert(s);
-
- if (!(r = avahi_record_new_full(name ? name : s->host_name_fqdn, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_TXT, ttl))) {
- avahi_string_list_free(strlst);
- avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
- return NULL;
- }
-
- r->data.txt.string_list = strlst;
- e = server_add_internal(s, g, interface, protocol, flags, r);
- avahi_record_unref(r);
-
- return e;
-}
-
-static AvahiStringList *add_magic_cookie(
- AvahiServer *s,
- AvahiStringList *strlst) {
-
- assert(s);
-
- if (!s->config.add_service_cookie)
- return strlst;
-
- if (avahi_string_list_find(strlst, AVAHI_SERVICE_COOKIE))
- /* This string list already contains a magic cookie */
- return strlst;
-
- return avahi_string_list_add_printf(strlst, AVAHI_SERVICE_COOKIE"=%u", s->local_service_cookie);
-}
-
-static int server_add_service_strlst_nocopy(
- AvahiServer *s,
- AvahiSEntryGroup *g,
- AvahiIfIndex interface,
- AvahiProtocol protocol,
- AvahiPublishFlags flags,
- const char *name,
- const char *type,
- const char *domain,
- const char *host,
- uint16_t port,
- AvahiStringList *strlst) {
-
- char ptr_name[AVAHI_DOMAIN_NAME_MAX], svc_name[AVAHI_DOMAIN_NAME_MAX], enum_ptr[AVAHI_DOMAIN_NAME_MAX], *h = NULL;
- AvahiRecord *r = NULL;
- int ret = AVAHI_OK;
- AvahiEntry *srv_entry = NULL, *txt_entry = NULL, *ptr_entry = NULL, *enum_entry = NULL;
-
- assert(s);
- assert(type);
- assert(name);
-
- AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
- AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL);
- AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_FLAGS_VALID(flags,
- AVAHI_PUBLISH_NO_COOKIE|
- AVAHI_PUBLISH_UPDATE|
- AVAHI_PUBLISH_USE_WIDE_AREA|
- AVAHI_PUBLISH_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS);
- AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_name(name), AVAHI_ERR_INVALID_SERVICE_NAME);
- AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_type_strict(type), AVAHI_ERR_INVALID_SERVICE_TYPE);
- AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME);
- AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !host || avahi_is_valid_fqdn(host), AVAHI_ERR_INVALID_HOST_NAME);
-
- if (!domain)
- domain = s->domain_name;
-
- if (!host)
- host = s->host_name_fqdn;
-
- transport_flags_from_domain(s, &flags, domain);
- AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, flags & AVAHI_PUBLISH_USE_MULTICAST, AVAHI_ERR_NOT_SUPPORTED);
-
- if (!(h = avahi_normalize_name_strdup(host))) {
- ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
- goto fail;
- }
-
- if ((ret = avahi_service_name_join(svc_name, sizeof(svc_name), name, type, domain)) < 0 ||
- (ret = avahi_service_name_join(ptr_name, sizeof(ptr_name), NULL, type, domain)) < 0 ||
- (ret = avahi_service_name_join(enum_ptr, sizeof(enum_ptr), NULL, "_services._dns-sd._udp", domain)) < 0) {
- avahi_server_set_errno(s, ret);
- goto fail;
- }
-
- /* Add service enumeration PTR record */
-
- if (!(ptr_entry = server_add_ptr_internal(s, g, interface, protocol, 0, AVAHI_DEFAULT_TTL, ptr_name, svc_name))) {
- ret = avahi_server_errno(s);
- goto fail;
- }
-
- /* Add SRV record */
-
- if (!(r = avahi_record_new_full(svc_name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_SRV, AVAHI_DEFAULT_TTL_HOST_NAME))) {
- ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
- goto fail;
- }
-
- r->data.srv.priority = 0;
- r->data.srv.weight = 0;
- r->data.srv.port = port;
- r->data.srv.name = h;
- h = NULL;
- srv_entry = server_add_internal(s, g, interface, protocol, AVAHI_PUBLISH_UNIQUE, r);
- avahi_record_unref(r);
-
- if (!srv_entry) {
- ret = avahi_server_errno(s);
- goto fail;
- }
-
- /* Add TXT record */
-
- if (!(flags & AVAHI_PUBLISH_NO_COOKIE))
- strlst = add_magic_cookie(s, strlst);
-
- txt_entry = server_add_txt_strlst_nocopy(s, g, interface, protocol, AVAHI_PUBLISH_UNIQUE, AVAHI_DEFAULT_TTL, svc_name, strlst);
- strlst = NULL;
-
- if (!txt_entry) {
- ret = avahi_server_errno(s);
- goto fail;
- }
-
- /* Add service type enumeration record */
-
- if (!(enum_entry = server_add_ptr_internal(s, g, interface, protocol, 0, AVAHI_DEFAULT_TTL, enum_ptr, ptr_name))) {
- ret = avahi_server_errno(s);
- goto fail;
- }
-
-fail:
- if (ret != AVAHI_OK && !(flags & AVAHI_PUBLISH_UPDATE)) {
- if (srv_entry)
- avahi_entry_free(s, srv_entry);
- if (txt_entry)
- avahi_entry_free(s, txt_entry);
- if (ptr_entry)
- avahi_entry_free(s, ptr_entry);
- if (enum_entry)
- avahi_entry_free(s, enum_entry);
- }
-
- avahi_string_list_free(strlst);
- avahi_free(h);
-
- return ret;
-}
-
-int avahi_server_add_service_strlst(
- AvahiServer *s,
- AvahiSEntryGroup *g,
- AvahiIfIndex interface,
- AvahiProtocol protocol,
- AvahiPublishFlags flags,
- const char *name,
- const char *type,
- const char *domain,
- const char *host,
- uint16_t port,
- AvahiStringList *strlst) {
-
- assert(s);
- assert(type);
- assert(name);
-
- return server_add_service_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, host, port, avahi_string_list_copy(strlst));
-}
-
-int avahi_server_add_service(
- AvahiServer *s,
- AvahiSEntryGroup *g,
- AvahiIfIndex interface,
- AvahiProtocol protocol,
- AvahiPublishFlags flags,
- const char *name,
- const char *type,
- const char *domain,
- const char *host,
- uint16_t port,
- ... ){
-
- va_list va;
- int ret;
-
- va_start(va, port);
- ret = server_add_service_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, host, port, avahi_string_list_new_va(va));
- va_end(va);
-
- return ret;
-}
-
-static int server_update_service_txt_strlst_nocopy(
- AvahiServer *s,
- AvahiSEntryGroup *g,
- AvahiIfIndex interface,
- AvahiProtocol protocol,
- AvahiPublishFlags flags,
- const char *name,
- const char *type,
- const char *domain,
- AvahiStringList *strlst) {
-
- char svc_name[AVAHI_DOMAIN_NAME_MAX];
- int ret = AVAHI_OK;
- AvahiEntry *e;
-
- assert(s);
- assert(type);
- assert(name);
-
- AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
- AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL);
- AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_FLAGS_VALID(flags,
- AVAHI_PUBLISH_NO_COOKIE|
- AVAHI_PUBLISH_USE_WIDE_AREA|
- AVAHI_PUBLISH_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS);
- AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_name(name), AVAHI_ERR_INVALID_SERVICE_NAME);
- AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_type_strict(type), AVAHI_ERR_INVALID_SERVICE_TYPE);
- AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME);
-
- if (!domain)
- domain = s->domain_name;
-
- transport_flags_from_domain(s, &flags, domain);
- AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, flags & AVAHI_PUBLISH_USE_MULTICAST, AVAHI_ERR_NOT_SUPPORTED);
-
- if ((ret = avahi_service_name_join(svc_name, sizeof(svc_name), name, type, domain)) < 0) {
- avahi_server_set_errno(s, ret);
- goto fail;
- }
-
- /* Add TXT record */
- if (!(flags & AVAHI_PUBLISH_NO_COOKIE))
- strlst = add_magic_cookie(s, strlst);
-
- e = server_add_txt_strlst_nocopy(s, g, interface, protocol, AVAHI_PUBLISH_UNIQUE | AVAHI_PUBLISH_UPDATE, AVAHI_DEFAULT_TTL, svc_name, strlst);
- strlst = NULL;
-
- if (!e)
- ret = avahi_server_errno(s);
-
-fail:
-
- avahi_string_list_free(strlst);
-
- return ret;
-}
-
-int avahi_server_update_service_txt_strlst(
- AvahiServer *s,
- AvahiSEntryGroup *g,
- AvahiIfIndex interface,
- AvahiProtocol protocol,
- AvahiPublishFlags flags,
- const char *name,
- const char *type,
- const char *domain,
- AvahiStringList *strlst) {
-
- return server_update_service_txt_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, avahi_string_list_copy(strlst));
-}
-
-/** Update the TXT record for a service with the NULL termonate list of strings */
-int avahi_server_update_service_txt(
- AvahiServer *s,
- AvahiSEntryGroup *g,
- AvahiIfIndex interface,
- AvahiProtocol protocol,
- AvahiPublishFlags flags,
- const char *name,
- const char *type,
- const char *domain,
- ...) {
-
- va_list va;
- int ret;
-
- va_start(va, domain);
- ret = server_update_service_txt_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, avahi_string_list_new_va(va));
- va_end(va);
-
- return ret;
-}
-
-int avahi_server_add_service_subtype(
- AvahiServer *s,
- AvahiSEntryGroup *g,
- AvahiIfIndex interface,
- AvahiProtocol protocol,
- AvahiPublishFlags flags,
- const char *name,
- const char *type,
- const char *domain,
- const char *subtype) {
-
- int ret = AVAHI_OK;
- char svc_name[AVAHI_DOMAIN_NAME_MAX], ptr_name[AVAHI_DOMAIN_NAME_MAX];
-
- assert(name);
- assert(type);
- assert(subtype);
-
- AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
- AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL);
- AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_FLAGS_VALID(flags, AVAHI_PUBLISH_USE_MULTICAST|AVAHI_PUBLISH_USE_WIDE_AREA), AVAHI_ERR_INVALID_FLAGS);
- AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_name(name), AVAHI_ERR_INVALID_SERVICE_NAME);
- AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_type_strict(type), AVAHI_ERR_INVALID_SERVICE_TYPE);
- AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME);
- AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_subtype(subtype), AVAHI_ERR_INVALID_SERVICE_SUBTYPE);
-
- if (!domain)
- domain = s->domain_name;
-
- transport_flags_from_domain(s, &flags, domain);
- AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, flags & AVAHI_PUBLISH_USE_MULTICAST, AVAHI_ERR_NOT_SUPPORTED);
-
- if ((ret = avahi_service_name_join(svc_name, sizeof(svc_name), name, type, domain)) < 0 ||
- (ret = avahi_service_name_join(ptr_name, sizeof(ptr_name), NULL, subtype, domain)) < 0) {
- avahi_server_set_errno(s, ret);
- goto fail;
- }
-
- if ((ret = avahi_server_add_ptr(s, g, interface, protocol, 0, AVAHI_DEFAULT_TTL, ptr_name, svc_name)) < 0)
- goto fail;
-
-fail:
-
- return ret;
-}
-
-static void hexstring(char *s, size_t sl, const void *p, size_t pl) {
- static const char hex[] = "0123456789abcdef";
- int b = 0;
- const uint8_t *k = p;
-
- while (sl > 1 && pl > 0) {
- *(s++) = hex[(b ? *k : *k >> 4) & 0xF];
-
- if (b) {
- k++;
- pl--;
- }
-
- b = !b;
-
- sl--;
- }
-
- if (sl > 0)
- *s = 0;
-}
-
-static AvahiEntry *server_add_dns_server_name(
- AvahiServer *s,
- AvahiSEntryGroup *g,
- AvahiIfIndex interface,
- AvahiProtocol protocol,
- AvahiPublishFlags flags,
- const char *domain,
- AvahiDNSServerType type,
- const char *name,
- uint16_t port /** should be 53 */) {
-
- AvahiEntry *e;
- char t[AVAHI_DOMAIN_NAME_MAX], normalized_d[AVAHI_DOMAIN_NAME_MAX], *n;
-
- AvahiRecord *r;
-
- assert(s);
- assert(name);
-
- AVAHI_CHECK_VALIDITY_RETURN_NULL(s, AVAHI_FLAGS_VALID(flags, AVAHI_PUBLISH_USE_WIDE_AREA|AVAHI_PUBLISH_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS);
- AVAHI_CHECK_VALIDITY_RETURN_NULL(s, type == AVAHI_DNS_SERVER_UPDATE || type == AVAHI_DNS_SERVER_RESOLVE, AVAHI_ERR_INVALID_FLAGS);
- AVAHI_CHECK_VALIDITY_RETURN_NULL(s, port != 0, AVAHI_ERR_INVALID_PORT);
- AVAHI_CHECK_VALIDITY_RETURN_NULL(s, avahi_is_valid_fqdn(name), AVAHI_ERR_INVALID_HOST_NAME);
- AVAHI_CHECK_VALIDITY_RETURN_NULL(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME);
-
- if (!domain)
- domain = s->domain_name;
-
- transport_flags_from_domain(s, &flags, domain);
- AVAHI_CHECK_VALIDITY_RETURN_NULL(s, flags & AVAHI_PUBLISH_USE_MULTICAST, AVAHI_ERR_NOT_SUPPORTED);
-
- if (!(n = avahi_normalize_name_strdup(name))) {
- avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
- return NULL;
- }
-
- AVAHI_ASSERT_TRUE(avahi_normalize_name(domain, normalized_d, sizeof(normalized_d)));
-
- snprintf(t, sizeof(t), "%s.%s", type == AVAHI_DNS_SERVER_RESOLVE ? "_domain._udp" : "_dns-update._udp", normalized_d);
-
- if (!(r = avahi_record_new_full(t, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_SRV, AVAHI_DEFAULT_TTL_HOST_NAME))) {
- avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
- avahi_free(n);
- return NULL;
- }
-
- r->data.srv.priority = 0;
- r->data.srv.weight = 0;
- r->data.srv.port = port;
- r->data.srv.name = n;
- e = server_add_internal(s, g, interface, protocol, 0, r);
- avahi_record_unref(r);
-
- return e;
-}
-
-int avahi_server_add_dns_server_address(
- AvahiServer *s,
- AvahiSEntryGroup *g,
- AvahiIfIndex interface,
- AvahiProtocol protocol,
- AvahiPublishFlags flags,
- const char *domain,
- AvahiDNSServerType type,
- const AvahiAddress *address,
- uint16_t port /** should be 53 */) {
-
- AvahiRecord *r;
- char n[64], h[64];
- AvahiEntry *a_entry, *s_entry;
-
- assert(s);
- assert(address);
-
- AVAHI_CHECK_VALIDITY(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
- AVAHI_CHECK_VALIDITY(s, AVAHI_PROTO_VALID(protocol) && AVAHI_PROTO_VALID(address->proto), AVAHI_ERR_INVALID_PROTOCOL);
- AVAHI_CHECK_VALIDITY(s, AVAHI_FLAGS_VALID(flags, AVAHI_PUBLISH_USE_MULTICAST|AVAHI_PUBLISH_USE_WIDE_AREA), AVAHI_ERR_INVALID_FLAGS);
- AVAHI_CHECK_VALIDITY(s, type == AVAHI_DNS_SERVER_UPDATE || type == AVAHI_DNS_SERVER_RESOLVE, AVAHI_ERR_INVALID_FLAGS);
- AVAHI_CHECK_VALIDITY(s, port != 0, AVAHI_ERR_INVALID_PORT);
- AVAHI_CHECK_VALIDITY(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME);
-
- if (!domain)
- domain = s->domain_name;
-
- transport_flags_from_domain(s, &flags, domain);
- AVAHI_CHECK_VALIDITY(s, flags & AVAHI_PUBLISH_USE_MULTICAST, AVAHI_ERR_NOT_SUPPORTED);
-
- if (address->proto == AVAHI_PROTO_INET) {
- hexstring(h, sizeof(h), &address->data, sizeof(AvahiIPv4Address));
- snprintf(n, sizeof(n), "ip-%s.%s", h, domain);
- r = avahi_record_new_full(n, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_A, AVAHI_DEFAULT_TTL_HOST_NAME);
- r->data.a.address = address->data.ipv4;
- } else {
- hexstring(h, sizeof(h), &address->data, sizeof(AvahiIPv6Address));
- snprintf(n, sizeof(n), "ip6-%s.%s", h, domain);
- r = avahi_record_new_full(n, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_AAAA, AVAHI_DEFAULT_TTL_HOST_NAME);
- r->data.aaaa.address = address->data.ipv6;
- }
-
- if (!r)
- return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
-
- a_entry = server_add_internal(s, g, interface, protocol, AVAHI_PUBLISH_UNIQUE | AVAHI_PUBLISH_ALLOW_MULTIPLE, r);
- avahi_record_unref(r);
-
- if (!a_entry)
- return avahi_server_errno(s);
-
- if (!(s_entry = server_add_dns_server_name(s, g, interface, protocol, flags, domain, type, n, port))) {
- if (!(flags & AVAHI_PUBLISH_UPDATE))
- avahi_entry_free(s, a_entry);
- return avahi_server_errno(s);
- }
-
- return AVAHI_OK;
-}
-
-void avahi_s_entry_group_change_state(AvahiSEntryGroup *g, AvahiEntryGroupState state) {
- assert(g);
-
- if (g->state == state)
- return;
-
- assert(state <= AVAHI_ENTRY_GROUP_COLLISION);
-
- if (g->state == AVAHI_ENTRY_GROUP_ESTABLISHED) {
-
- /* If the entry group was established for a time longer then
- * 5s, reset the establishment trial counter */
-
- if (avahi_age(&g->established_at) > 5000000)
- g->n_register_try = 0;
- } else if (g->state == AVAHI_ENTRY_GROUP_REGISTERING) {
- if (g->register_time_event) {
- avahi_time_event_free(g->register_time_event);
- g->register_time_event = NULL;
- }
- }
-
- if (state == AVAHI_ENTRY_GROUP_ESTABLISHED)
-
- /* If the entry group is now established, remember the time
- * this happened */
-
- gettimeofday(&g->established_at, NULL);
-
- g->state = state;
-
- if (g->callback)
- g->callback(g->server, g, state, g->userdata);
-}
-
-AvahiSEntryGroup *avahi_s_entry_group_new(AvahiServer *s, AvahiSEntryGroupCallback callback, void* userdata) {
- AvahiSEntryGroup *g;
-
- assert(s);
-
- if (!(g = avahi_new(AvahiSEntryGroup, 1))) {
- avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
- return NULL;
- }
-
- g->server = s;
- g->callback = callback;
- g->userdata = userdata;
- g->dead = 0;
- g->state = AVAHI_ENTRY_GROUP_UNCOMMITED;
- g->n_probing = 0;
- g->n_register_try = 0;
- g->register_time_event = NULL;
- g->register_time.tv_sec = 0;
- g->register_time.tv_usec = 0;
- AVAHI_LLIST_HEAD_INIT(AvahiEntry, g->entries);
-
- AVAHI_LLIST_PREPEND(AvahiSEntryGroup, groups, s->groups, g);
- return g;
-}
-
-static void cleanup_time_event_callback(AVAHI_GCC_UNUSED AvahiTimeEvent *e, void* userdata) {
- AvahiServer *s = userdata;
-
- assert(s);
-
- avahi_cleanup_dead_entries(s);
-}
-
-static void schedule_cleanup(AvahiServer *s) {
- struct timeval tv;
-
- assert(s);
-
- if (!s->cleanup_time_event)
- s->cleanup_time_event = avahi_time_event_new(s->time_event_queue, avahi_elapse_time(&tv, 1000, 0), &cleanup_time_event_callback, s);
-}
-
-void avahi_s_entry_group_free(AvahiSEntryGroup *g) {
- AvahiEntry *e;
-
- assert(g);
- assert(g->server);
-
- for (e = g->entries; e; e = e->by_group_next) {
- if (!e->dead) {
- avahi_goodbye_entry(g->server, e, 1, 1);
- e->dead = 1;
- }
- }
-
- if (g->register_time_event) {
- avahi_time_event_free(g->register_time_event);
- g->register_time_event = NULL;
- }
-
- g->dead = 1;
-
- g->server->need_group_cleanup = 1;
- g->server->need_entry_cleanup = 1;
-
- schedule_cleanup(g->server);
-}
-
-static void entry_group_commit_real(AvahiSEntryGroup *g) {
- assert(g);
-
- gettimeofday(&g->register_time, NULL);
-
- avahi_s_entry_group_change_state(g, AVAHI_ENTRY_GROUP_REGISTERING);
-
- if (g->dead)
- return;
-
- avahi_announce_group(g->server, g);
- avahi_s_entry_group_check_probed(g, 0);
-}
-
-static void entry_group_register_time_event_callback(AVAHI_GCC_UNUSED AvahiTimeEvent *e, void* userdata) {
- AvahiSEntryGroup *g = userdata;
- assert(g);
-
- avahi_time_event_free(g->register_time_event);
- g->register_time_event = NULL;
-
- /* Holdoff time passed, so let's start probing */
- entry_group_commit_real(g);
-}
-
-int avahi_s_entry_group_commit(AvahiSEntryGroup *g) {
- struct timeval now;
-
- assert(g);
- assert(!g->dead);
-
- if (g->state != AVAHI_ENTRY_GROUP_UNCOMMITED && g->state != AVAHI_ENTRY_GROUP_COLLISION)
- return avahi_server_set_errno(g->server, AVAHI_ERR_BAD_STATE);
-
- if (avahi_s_entry_group_is_empty(g))
- return avahi_server_set_errno(g->server, AVAHI_ERR_IS_EMPTY);
-
- g->n_register_try++;
-
- avahi_timeval_add(&g->register_time,
- 1000*(g->n_register_try >= AVAHI_RR_RATE_LIMIT_COUNT ?
- AVAHI_RR_HOLDOFF_MSEC_RATE_LIMIT :
- AVAHI_RR_HOLDOFF_MSEC));
-
- gettimeofday(&now, NULL);
-
- if (avahi_timeval_compare(&g->register_time, &now) <= 0) {
-
- /* Holdoff time passed, so let's start probing */
- entry_group_commit_real(g);
- } else {
-
- /* Holdoff time has not yet passed, so let's wait */
- assert(!g->register_time_event);
- g->register_time_event = avahi_time_event_new(g->server->time_event_queue, &g->register_time, entry_group_register_time_event_callback, g);
-
- avahi_s_entry_group_change_state(g, AVAHI_ENTRY_GROUP_REGISTERING);
- }
-
- return AVAHI_OK;
-}
-
-void avahi_s_entry_group_reset(AvahiSEntryGroup *g) {
- AvahiEntry *e;
- assert(g);
-
- for (e = g->entries; e; e = e->by_group_next) {
- if (!e->dead) {
- avahi_goodbye_entry(g->server, e, 1, 1);
- e->dead = 1;
- }
- }
- g->server->need_entry_cleanup = 1;
-
- g->n_probing = 0;
-
- avahi_s_entry_group_change_state(g, AVAHI_ENTRY_GROUP_UNCOMMITED);
-
- schedule_cleanup(g->server);
-}
-
-int avahi_entry_is_commited(AvahiEntry *e) {
- assert(e);
- assert(!e->dead);
-
- return !e->group ||
- e->group->state == AVAHI_ENTRY_GROUP_REGISTERING ||
- e->group->state == AVAHI_ENTRY_GROUP_ESTABLISHED;
-}
-
-AvahiEntryGroupState avahi_s_entry_group_get_state(AvahiSEntryGroup *g) {
- assert(g);
- assert(!g->dead);
-
- return g->state;
-}
-
-void avahi_s_entry_group_set_data(AvahiSEntryGroup *g, void* userdata) {
- assert(g);
-
- g->userdata = userdata;
-}
-
-void* avahi_s_entry_group_get_data(AvahiSEntryGroup *g) {
- assert(g);
-
- return g->userdata;
-}
-
-int avahi_s_entry_group_is_empty(AvahiSEntryGroup *g) {
- AvahiEntry *e;
- assert(g);
-
- /* Look for an entry that is not dead */
- for (e = g->entries; e; e = e->by_group_next)
- if (!e->dead)
- return 0;
-
- return 1;
-}
projects / catta / blobdiff