static void create_cnames(AvahiClient *c)
{
struct runtime_data r;
/* If this is the first time we're called, let's create a new entry group if necessary */
if ((!_group)&&(!(_group = avahi_entry_group_new(c, entry_group_callback, NULL))))
{
ap_log_error(APLOG_MARK, APLOG_ERR, 0, r.main_server, "avahi_entry_group_new() failed: %s", avahi_strerror(avahi_client_errno(c)));
goto fail;
}
/* If the group is empty (either because it was just created, or because it was reset previously, add our entries. */
if (avahi_entry_group_is_empty(_group))
{
char hostname[HOST_NAME_MAX+64] = "."; /* this dot will be overwritten with a count-byte, below */
if (gethostname(&hostname[1], sizeof(hostname)-1) < 0) perror("gethostname");
strncat(hostname, ".local", sizeof(hostname));
hostname[sizeof(hostname)-1] = '\0'; /* paranoia? */
/* Convert the hostname string into DNS's labelled-strings format */
int hostnameLen = strlen(hostname);
char count = 0;
int i;
for (i=hostnameLen-1; i>=0; i--)
{
if (hostname[i] == '.')
{
hostname[i] = count;
count = 0;
}
else count++;
}
for (i=0; (_cnames[i] != NULL); i++)
{
int ret = avahi_entry_group_add_record(_group, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, (AvahiPublishFlags)(AVAHI_PUBLISH_USE_MULTICAST|AVAHI_PUBLISH_ALLOW_MULTIPLE), _cnames[i], AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_CNAME, AVAHI_DEFAULT_TTL, hostname, hostnameLen+1);
if (ret >= 0) ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, r.main_server, "Published DNS-SD hostname alias [%s]", _cnames[i]);
else
{
ap_log_error(APLOG_MARK, APLOG_ERR, 0, r.main_server, "Failed to add CNAME record [%s]: %s", _cnames[i], avahi_strerror(ret));
goto fail;
}
}
int ret = avahi_entry_group_commit(_group);
if (ret < 0)
{
ap_log_error(APLOG_MARK, APLOG_ERR, 0, r.main_server, "Failed to commit entry group: %s", avahi_strerror(ret));
goto fail;
}
}
return;
fail:
avahi_simple_poll_quit(_poll);
}
gboolean _mdns_set_buddy_icon_data(BonjourDnsSd *data, gconstpointer avatar_data, gsize avatar_len) {
AvahiSessionImplData *idata = data->mdns_impl_data;
if (idata == NULL || idata->client == NULL)
return FALSE;
if (avatar_data != NULL) {
gboolean new_group = FALSE;
gchar *svc_name;
int ret;
AvahiPublishFlags flags = 0;
if (idata->buddy_icon_group == NULL) {
purple_debug_info("bonjour", "Setting new buddy icon.\n");
new_group = TRUE;
idata->buddy_icon_group = avahi_entry_group_new(idata->client,
_buddy_icon_group_cb, data);
} else {
purple_debug_info("bonjour", "Updating existing buddy icon.\n");
flags |= AVAHI_PUBLISH_UPDATE;
}
if (idata->buddy_icon_group == NULL) {
purple_debug_error("bonjour",
"Unable to initialize the buddy icon group (%s).\n",
avahi_strerror(avahi_client_errno(idata->client)));
return FALSE;
}
svc_name = g_strdup_printf("%s." ICHAT_SERVICE "local",
purple_account_get_username(data->account));
ret = avahi_entry_group_add_record(idata->buddy_icon_group, AVAHI_IF_UNSPEC,
AVAHI_PROTO_UNSPEC, flags, svc_name,
AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_NULL, 120, avatar_data, avatar_len);
g_free(svc_name);
if (ret < 0) {
purple_debug_error("bonjour",
"Failed to register buddy icon. Error: %s\n", avahi_strerror(ret));
if (new_group) {
avahi_entry_group_free(idata->buddy_icon_group);
idata->buddy_icon_group = NULL;
}
return FALSE;
}
if (new_group && (ret = avahi_entry_group_commit(idata->buddy_icon_group)) < 0) {
purple_debug_error("bonjour",
"Failed to commit buddy icon group. Error: %s\n", avahi_strerror(ret));
if (new_group) {
avahi_entry_group_free(idata->buddy_icon_group);
idata->buddy_icon_group = NULL;
}
return FALSE;
}
} else if (idata->buddy_icon_group != NULL) {
purple_debug_info("bonjour", "Removing existing buddy icon.\n");
avahi_entry_group_free(idata->buddy_icon_group);
idata->buddy_icon_group = NULL;
}
return TRUE;
}
static int
create_group_entry(struct mdns_group_entry *ge, int commit)
{
char hostname[HOST_NAME_MAX + 1];
char rdata[HOST_NAME_MAX + 6 + 1]; // Includes room for ".local" and 0-terminator
int count;
int i;
int ret;
if (!mdns_group)
{
mdns_group = avahi_entry_group_new(mdns_client, entry_group_callback, NULL);
if (!mdns_group)
{
DPRINTF(E_WARN, L_MDNS, "Could not create Avahi EntryGroup: %s\n", MDNSERR);
return -1;
}
}
if (ge->publish == MDNS_PUBLISH_SERVICE)
{
DPRINTF(E_DBG, L_MDNS, "Adding service %s/%s\n", ge->name, ge->type);
ret = avahi_entry_group_add_service_strlst(mdns_group, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, 0,
ge->name, ge->type,
NULL, NULL, ge->port, ge->txt);
if (ret < 0)
{
DPRINTF(E_LOG, L_MDNS, "Could not add mDNS service %s/%s: %s\n", ge->name, ge->type, avahi_strerror(ret));
return -1;
}
}
else if (ge->publish == MDNS_PUBLISH_CNAME)
{
DPRINTF(E_DBG, L_MDNS, "Adding CNAME record %s\n", ge->name);
ret = gethostname(hostname, HOST_NAME_MAX);
if (ret < 0)
{
DPRINTF(E_LOG, L_MDNS, "Could not add CNAME %s, gethostname failed\n", ge->name);
return -1;
}
// Note, gethostname does not guarantee 0-termination
hostname[HOST_NAME_MAX] = 0;
ret = snprintf(rdata, sizeof(rdata), ".%s.local", hostname);
if (!(ret > 0 && ret < sizeof(rdata)))
{
DPRINTF(E_LOG, L_MDNS, "Could not add CNAME %s, hostname is invalid\n", ge->name);
return -1;
}
// Convert to dns string: .forked-daapd.local -> \12forked-daapd\6local
count = 0;
for (i = ret - 1; i >= 0; i--)
{
if (rdata[i] == '.')
{
rdata[i] = count;
count = 0;
}
else
count++;
}
// ret + 1 should be the string length of rdata incl. 0-terminator
ret = avahi_entry_group_add_record(mdns_group, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC,
AVAHI_PUBLISH_USE_MULTICAST | AVAHI_PUBLISH_ALLOW_MULTIPLE,
ge->name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_CNAME,
AVAHI_DEFAULT_TTL, rdata, ret + 1);
if (ret < 0)
{
DPRINTF(E_LOG, L_MDNS, "Could not add CNAME record %s: %s\n", ge->name, avahi_strerror(ret));
return -1;
}
}
if (!commit)
return 0;
ret = avahi_entry_group_commit(mdns_group);
if (ret < 0)
{
DPRINTF(E_LOG, L_MDNS, "Could not commit mDNS services: %s\n", MDNSERR);
return -1;
}
return 0;
}
