diff options
Diffstat (limited to 'trunk/avahi-core/entry.c')
| -rw-r--r-- | trunk/avahi-core/entry.c | 1206 |
1 files changed, 0 insertions, 1206 deletions
diff --git a/trunk/avahi-core/entry.c b/trunk/avahi-core/entry.c deleted file mode 100644 index 9e9c0dd..0000000 --- a/trunk/avahi-core/entry.c +++ /dev/null @@ -1,1206 +0,0 @@ -/* $Id$ */ - -/*** - 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 <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); -} - -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 ((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; - } - - 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; -} - -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; -} - -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; - - if (g->register_time_event) { - avahi_time_event_free(g->register_time_event); - g->register_time_event = NULL; - } - - g->n_probing = 0; - - gettimeofday(&g->register_time, NULL); - - avahi_s_entry_group_change_state(g, AVAHI_ENTRY_GROUP_UNCOMMITED); -} - -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; -} |