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;
}
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 sender_timeout_callback(AvahiTimeEvent *e, void *userdata) {
AvahiWideAreaLookup *l = userdata;
struct timeval tv;
assert(l);
/* Try another DNS server after three retries */
if (l->n_send >= 3 && avahi_address_cmp(&l->engine->dns_servers[l->engine->current_dns_server], &l->dns_server_used) == 0) {
next_dns_server(l->engine);
if (avahi_address_cmp(&l->engine->dns_servers[l->engine->current_dns_server], &l->dns_server_used) == 0)
/* There is no other DNS server, fail */
l->n_send = 1000;
}
if (l->n_send >= 6) {
avahi_log_warn(__FILE__": Query timed out.");
avahi_server_set_errno(l->engine->server, AVAHI_ERR_TIMEOUT);
l->callback(l->engine, AVAHI_BROWSER_FAILURE, AVAHI_LOOKUP_RESULT_WIDE_AREA, NULL, l->userdata);
lookup_stop(l);
return;
}
assert(l->packet);
send_to_dns_server(l, l->packet);
l->n_send++;
avahi_time_event_update(e, avahi_elapse_time(&tv, 1000, 0));
}
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_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 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_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;
}
static void time_event_callback(AvahiTimeEvent *e, void *userdata) {
AvahiSServiceResolver *r = userdata;
assert(e);
assert(r);
avahi_server_set_errno(r->server, AVAHI_ERR_TIMEOUT);
finish(r, AVAHI_RESOLVER_FAILURE);
}
static void defer_callback(AVAHI_GCC_UNUSED AvahiTimeEvent *e, void *userdata) {
AvahiSRecordBrowser *b = userdata;
int n = 0;
assert(b);
assert(!b->dead);
/* Remove the defer timeout */
if (b->defer_time_event) {
avahi_time_event_free(b->defer_time_event);
b->defer_time_event = NULL;
}
/* Create initial query */
assert(!b->root_lookup);
b->root_lookup = lookup_add(b, b->interface, b->protocol, b->flags, b->key);
assert(b->root_lookup);
n = lookup_go(b->root_lookup);
if (b->dead)
return;
if (n < 0) {
/* sending of the initial query failed */
avahi_server_set_errno(b->server, AVAHI_ERR_FAILURE);
b->callback(
b, b->interface, b->protocol, AVAHI_BROWSER_FAILURE, NULL,
b->flags & AVAHI_LOOKUP_USE_WIDE_AREA ? AVAHI_LOOKUP_RESULT_WIDE_AREA :
(b->flags & AVAHI_LOOKUP_RESULT_MULTICAST ? AVAHI_LOOKUP_RESULT_MULTICAST : AVAHI_LOOKUP_RESULT_LLMNR),
b->userdata);
browser_cancel(b);
return;
}
/* Tell the client that we're done with the cache */
b->callback(
b, b->interface, b->protocol, AVAHI_BROWSER_CACHE_EXHAUSTED, NULL,
b->flags & AVAHI_LOOKUP_USE_WIDE_AREA ? AVAHI_LOOKUP_RESULT_WIDE_AREA :
(b->flags & AVAHI_LOOKUP_RESULT_MULTICAST ? AVAHI_LOOKUP_RESULT_MULTICAST : AVAHI_LOOKUP_RESULT_LLMNR),
b->userdata);
if (!b->dead && b->root_lookup &&
(b->root_lookup->flags & AVAHI_LOOKUP_USE_WIDE_AREA) &&
n > 0 ) {
/* If we do wide area lookups and the the cache contained
* entries, we assume that it is complete, and tell the user
* so by firing ALL_FOR_NOW. */
b->callback(b, b->interface, b->protocol, AVAHI_BROWSER_ALL_FOR_NOW, NULL, AVAHI_LOOKUP_RESULT_LLMNR, b->userdata);
}
}
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_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;
}
AvahiSRecordBrowser *avahi_s_record_browser_new(
AvahiServer *server,
AvahiIfIndex interface,
AvahiProtocol protocol,
AvahiKey *key,
AvahiLookupFlags flags,
AvahiSRecordBrowserCallback callback,
void* userdata) {
AvahiSRecordBrowser *b;
assert(server);
assert(key);
assert(callback);
AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL);
AVAHI_CHECK_VALIDITY_RETURN_NULL(server, !avahi_key_is_pattern(key), AVAHI_ERR_IS_PATTERN);
AVAHI_CHECK_VALIDITY_RETURN_NULL(server, avahi_key_is_valid(key), AVAHI_ERR_INVALID_KEY);
AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_FLAGS_VALID(flags, AVAHI_LOOKUP_USE_WIDE_AREA|AVAHI_LOOKUP_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS);
AVAHI_CHECK_VALIDITY_RETURN_NULL(server, !(flags & AVAHI_LOOKUP_USE_WIDE_AREA) || !(flags & AVAHI_LOOKUP_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS);
if (!(b = avahi_new(AvahiSRecordBrowser, 1))) {
avahi_server_set_errno(server, AVAHI_ERR_NO_MEMORY);
return NULL;
}
b->dead = 0;
b->server = server;
b->interface = interface;
b->protocol = protocol;
b->key = avahi_key_ref(key);
b->flags = flags;
b->callback = callback;
b->userdata = userdata;
b->n_lookups = 0;
AVAHI_LLIST_HEAD_INIT(AvahiSRBLookup, b->lookups);
b->root_lookup = NULL;
AVAHI_LLIST_PREPEND(AvahiSRecordBrowser, browser, server->record_browsers, b);
/* The currently cached entries are scanned a bit later, and than we will start querying, too */
b->defer_time_event = avahi_time_event_new(server->time_event_queue, NULL, defer_callback, b);
assert(b->defer_time_event);
return b;
}
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;
}
AvahiSServiceResolver *avahi_s_service_resolver_new(
AvahiServer *server,
AvahiIfIndex interface,
AvahiProtocol protocol,
const char *name,
const char *type,
const char *domain,
AvahiProtocol aprotocol,
AvahiLookupFlags flags,
AvahiSServiceResolverCallback callback,
void* userdata) {
AvahiSServiceResolver *r;
AvahiKey *k;
char n[AVAHI_DOMAIN_NAME_MAX];
int ret;
assert(server);
assert(type);
assert(callback);
AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL);
AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_PROTO_VALID(aprotocol), AVAHI_ERR_INVALID_PROTOCOL);
AVAHI_CHECK_VALIDITY_RETURN_NULL(server, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME);
AVAHI_CHECK_VALIDITY_RETURN_NULL(server, !name || avahi_is_valid_service_name(name), AVAHI_ERR_INVALID_SERVICE_NAME);
AVAHI_CHECK_VALIDITY_RETURN_NULL(server, avahi_is_valid_service_type_strict(type), AVAHI_ERR_INVALID_SERVICE_TYPE);
AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_FLAGS_VALID(flags, AVAHI_LOOKUP_USE_WIDE_AREA|AVAHI_LOOKUP_USE_MULTICAST|AVAHI_LOOKUP_NO_TXT|AVAHI_LOOKUP_NO_ADDRESS), AVAHI_ERR_INVALID_FLAGS);
if (!domain)
domain = server->domain_name;
if ((ret = avahi_service_name_join(n, sizeof(n), name, type, domain)) < 0) {
avahi_server_set_errno(server, ret);
return NULL;
}
if (!(r = avahi_new(AvahiSServiceResolver, 1))) {
avahi_server_set_errno(server, AVAHI_ERR_NO_MEMORY);
return NULL;
}
r->server = server;
r->service_name = avahi_strdup(name);
r->service_type = avahi_normalize_name_strdup(type);
r->domain_name = avahi_normalize_name_strdup(domain);
r->callback = callback;
r->userdata = userdata;
r->address_protocol = aprotocol;
r->srv_record = r->txt_record = r->address_record = NULL;
r->srv_flags = r->txt_flags = r->address_flags = 0;
r->interface = interface;
r->protocol = protocol;
r->user_flags = flags;
r->record_browser_a = r->record_browser_aaaa = r->record_browser_srv = r->record_browser_txt = NULL;
r->time_event = NULL;
AVAHI_LLIST_PREPEND(AvahiSServiceResolver, resolver, server->service_resolvers, r);
k = avahi_key_new(n, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_SRV);
r->record_browser_srv = avahi_s_record_browser_new(server, interface, protocol, k, flags & ~(AVAHI_LOOKUP_NO_TXT|AVAHI_LOOKUP_NO_ADDRESS), record_browser_callback, r);
avahi_key_unref(k);
if (!r->record_browser_srv) {
avahi_s_service_resolver_free(r);
return NULL;
}
if (!(flags & AVAHI_LOOKUP_NO_TXT)) {
k = avahi_key_new(n, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_TXT);
r->record_browser_txt = avahi_s_record_browser_new(server, interface, protocol, k, flags & ~(AVAHI_LOOKUP_NO_TXT|AVAHI_LOOKUP_NO_ADDRESS), record_browser_callback, r);
avahi_key_unref(k);
if (!r->record_browser_txt) {
avahi_s_service_resolver_free(r);
return NULL;
}
}
start_timeout(r);
return r;
}
AvahiSAddressResolver *avahi_s_address_resolver_new(
AvahiServer *server,
AvahiIfIndex interface,
AvahiProtocol protocol,
const AvahiAddress *address,
AvahiLookupFlags flags,
AvahiSAddressResolverCallback callback,
void* userdata) {
AvahiSAddressResolver *r;
AvahiKey *k;
char n[AVAHI_DOMAIN_NAME_MAX];
assert(server);
assert(address);
assert(callback);
AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL);
AVAHI_CHECK_VALIDITY_RETURN_NULL(server, address->proto == AVAHI_PROTO_INET || address->proto == AVAHI_PROTO_INET6, AVAHI_ERR_INVALID_PROTOCOL);
AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_FLAGS_VALID(flags, AVAHI_LOOKUP_USE_WIDE_AREA|AVAHI_LOOKUP_USE_MULTICAST|AVAHI_LOOKUP_USE_LLMNR), AVAHI_ERR_INVALID_FLAGS);
avahi_reverse_lookup_name(address, n, sizeof(n));
if (!(k = avahi_key_new(n, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_PTR))) {
avahi_server_set_errno(server, AVAHI_ERR_NO_MEMORY);
return NULL;
}
if (!(r = avahi_new(AvahiSAddressResolver, 1))) {
avahi_server_set_errno(server, AVAHI_ERR_NO_MEMORY);
avahi_key_unref(k);
return NULL;
}
r->server = server;
r->address = *address;
r->callback = callback;
r->userdata = userdata;
r->ptr_record = NULL;
r->interface = interface;
r->protocol = protocol;
r->flags = 0;
r->retry_with_multicast = 0;
r->retry_with_llmnr = 0;
r->llmnr_has_record = 0;
r->key = k;
r->record_browser = NULL;
AVAHI_LLIST_PREPEND(AvahiSAddressResolver, resolver, server->address_resolvers, r);
r->time_event = NULL;
if (!(flags & (AVAHI_LOOKUP_USE_MULTICAST|AVAHI_LOOKUP_USE_WIDE_AREA|AVAHI_LOOKUP_USE_LLMNR))) {
if (!server->wide_area.wide_area_lookup_engine || !avahi_wide_area_has_servers(server->wide_area.wide_area_lookup_engine))
flags |= AVAHI_LOOKUP_USE_LLMNR;
else {
flags |= AVAHI_LOOKUP_USE_WIDE_AREA;
r->retry_with_llmnr = 1;
}
r->retry_with_multicast = 1;
}
r->record_browser = avahi_s_record_browser_new(server, interface, protocol, k, flags, record_browser_callback, r);
if (!r->record_browser) {
avahi_s_address_resolver_free(r);
return NULL;
}
start_timeout(r);
return r;
}
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_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 void handle_packet(AvahiWideAreaLookupEngine *e, AvahiDnsPacket *p) {
AvahiWideAreaLookup *l = NULL;
int i, r;
AvahiBrowserEvent final_event = AVAHI_BROWSER_ALL_FOR_NOW;
assert(e);
assert(p);
/* Some superficial validity tests */
if (avahi_dns_packet_check_valid(p) < 0 || avahi_dns_packet_is_query(p)) {
avahi_log_warn(__FILE__": Ignoring invalid response for wide area datagram.");
goto finish;
}
/* Look for the lookup that issued this query */
if (!(l = find_lookup(e, avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_ID))) || l->dead)
goto finish;
/* Check whether this a packet indicating a failure */
if ((r = avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_FLAGS) & 15) != 0 ||
avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_ANCOUNT) == 0) {
avahi_server_set_errno(e->server, r == 0 ? AVAHI_ERR_NOT_FOUND : map_dns_error(r));
/* Tell the user about the failure */
final_event = AVAHI_BROWSER_FAILURE;
/* We go on here, since some of the records contained in the
reply might be interesting in some way */
}
/* Skip over the question */
for (i = (int) avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_QDCOUNT); i > 0; i--) {
AvahiKey *k;
if (!(k = avahi_dns_packet_consume_key(p, NULL))) {
avahi_log_warn(__FILE__": Wide area response packet too short or invalid while reading question key. (Maybe a UTF-8 problem?)");
avahi_server_set_errno(e->server, AVAHI_ERR_INVALID_PACKET);
final_event = AVAHI_BROWSER_FAILURE;
goto finish;
}
avahi_key_unref(k);
}
/* Process responses */
for (i = (int) avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_ANCOUNT) +
(int) avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_NSCOUNT) +
(int) avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_ARCOUNT); i > 0; i--) {
AvahiRecord *rr;
if (!(rr = avahi_dns_packet_consume_record(p, NULL))) {
avahi_log_warn(__FILE__": Wide area response packet too short or invalid while reading response record. (Maybe a UTF-8 problem?)");
avahi_server_set_errno(e->server, AVAHI_ERR_INVALID_PACKET);
final_event = AVAHI_BROWSER_FAILURE;
goto finish;
}
add_to_cache(e, rr);
avahi_record_unref(rr);
}
finish:
if (l && !l->dead) {
if (l->callback)
l->callback(e, final_event, AVAHI_LOOKUP_RESULT_WIDE_AREA, NULL, l->userdata);
lookup_stop(l);
}
}
AvahiSDomainBrowser *avahi_s_domain_browser_prepare(
AvahiServer *server,
AvahiIfIndex interface,
AvahiProtocol protocol,
const char *domain,
AvahiDomainBrowserType type,
AvahiLookupFlags flags,
AvahiSDomainBrowserCallback callback,
void* userdata) {
static const char * const type_table[AVAHI_DOMAIN_BROWSER_MAX] = {
"b",
"db",
"r",
"dr",
"lb"
};
AvahiSDomainBrowser *b;
AvahiKey *k = NULL;
char n[AVAHI_DOMAIN_NAME_MAX];
int r;
assert(server);
assert(callback);
AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL);
AVAHI_CHECK_VALIDITY_RETURN_NULL(server, type < AVAHI_DOMAIN_BROWSER_MAX, AVAHI_ERR_INVALID_FLAGS);
AVAHI_CHECK_VALIDITY_RETURN_NULL(server, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME);
AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_FLAGS_VALID(flags, AVAHI_LOOKUP_USE_WIDE_AREA|AVAHI_LOOKUP_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS);
if (!domain)
domain = server->domain_name;
if ((r = avahi_service_name_join(n, sizeof(n), type_table[type], "_dns-sd._udp", domain)) < 0) {
avahi_server_set_errno(server, r);
return NULL;
}
if (!(b = avahi_new(AvahiSDomainBrowser, 1))) {
avahi_server_set_errno(server, AVAHI_ERR_NO_MEMORY);
return NULL;
}
b->ref = 1;
b->server = server;
b->callback = callback;
b->userdata = userdata;
b->record_browser = NULL;
b->type = type;
b->all_for_now_scheduled = 0;
b->defer_event = NULL;
AVAHI_LLIST_PREPEND(AvahiSDomainBrowser, browser, server->domain_browsers, b);
if (!(k = avahi_key_new(n, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_PTR))) {
avahi_server_set_errno(server, AVAHI_ERR_NO_MEMORY);
goto fail;
}
if (!(b->record_browser = avahi_s_record_browser_prepare(server, interface, protocol, k, flags, record_browser_callback, b)))
goto fail;
avahi_key_unref(k);
if (type == AVAHI_DOMAIN_BROWSER_BROWSE && b->server->config.browse_domains)
b->defer_event = avahi_time_event_new(server->time_event_queue, NULL, defer_callback, b);
return b;
fail:
if (k)
avahi_key_unref(k);
avahi_s_domain_browser_free(b);
return NULL;
}
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;
}
