static struct mwi_subscription *mwi_subscribe_single(
struct ast_sip_endpoint *endpoint, struct ast_sip_subscription *sip_sub, const char *name)
{
RAII_VAR(struct ast_sip_aor *, aor,
ast_sip_location_retrieve_aor(name), ao2_cleanup);
struct mwi_subscription *sub;
if (!aor) {
/*! I suppose it's possible for the AOR to disappear on us
* between accepting the subscription and sending the first
* NOTIFY...
*/
ast_log(LOG_WARNING, "Unable to locate aor %s. MWI "
"subscription failed.\n", name);
return NULL;
}
if (!(sub = mwi_create_subscription(endpoint, sip_sub))) {
return NULL;
}
mwi_on_aor(aor, sub, 0);
return sub;
}
static void send_mwi_notify(struct mwi_subscription *sub)
{
struct ast_sip_message_accumulator counter = {
.old_msgs = 0,
.new_msgs = 0,
};
struct ast_sip_body_data data = {
.body_type = AST_SIP_MESSAGE_ACCUMULATOR,
.body_data = &counter,
};
ao2_callback(sub->stasis_subs, OBJ_NODATA, get_message_count, &counter);
if (sub->is_solicited) {
ast_sip_subscription_notify(sub->sip_sub, &data, 0);
return;
}
send_unsolicited_mwi_notify(sub, &counter);
}
static int unsubscribe_stasis(void *obj, void *arg, int flags)
{
struct mwi_stasis_subscription *mwi_stasis = obj;
if (mwi_stasis->stasis_sub) {
ast_debug(3, "Removing stasis subscription to mailbox %s\n", mwi_stasis->mailbox);
mwi_stasis->stasis_sub = stasis_unsubscribe_and_join(mwi_stasis->stasis_sub);
}
return CMP_MATCH;
}
static void mwi_subscription_shutdown(struct ast_sip_subscription *sub)
{
struct mwi_subscription *mwi_sub;
struct ast_datastore *mwi_datastore;
mwi_datastore = ast_sip_subscription_get_datastore(sub, MWI_DATASTORE);
if (!mwi_datastore) {
return;
}
mwi_sub = mwi_datastore->data;
ao2_callback(mwi_sub->stasis_subs, OBJ_UNLINK | OBJ_NODATA | OBJ_MULTIPLE, unsubscribe_stasis, NULL);
ast_sip_subscription_remove_datastore(sub, MWI_DATASTORE);
ao2_ref(mwi_datastore, -1);
}
static void mwi_ds_destroy(void *data)
{
struct mwi_subscription *sub = data;
ao2_ref(sub, -1);
}
static struct ast_datastore_info mwi_ds_info = {
.destroy = mwi_ds_destroy,
};
static int add_mwi_datastore(struct mwi_subscription *sub)
{
struct ast_datastore *mwi_datastore;
int res;
mwi_datastore = ast_sip_subscription_alloc_datastore(&mwi_ds_info, MWI_DATASTORE);
if (!mwi_datastore) {
return -1;
}
ao2_ref(sub, +1);
mwi_datastore->data = sub;
/*
* NOTE: Adding the datastore to the subscription creates a ref loop
* that must be manually broken.
*/
res = ast_sip_subscription_add_datastore(sub->sip_sub, mwi_datastore);
ao2_ref(mwi_datastore, -1);
return res;
}
/*!
* \brief Determines if an endpoint is receiving unsolicited MWI for a particular mailbox.
*
* \param endpoint The endpoint to check
* \param mailbox The candidate mailbox
* \retval 0 The endpoint does not receive unsolicited MWI for this mailbox
* \retval 1 The endpoint receives unsolicited MWI for this mailbox
*/
static int endpoint_receives_unsolicited_mwi_for_mailbox(struct ast_sip_endpoint *endpoint,
const char *mailbox)
{
struct ao2_iterator *mwi_subs;
struct mwi_subscription *mwi_sub;
const char *endpoint_id = ast_sorcery_object_get_id(endpoint);
int ret = 0;
mwi_subs = ao2_find(unsolicited_mwi, endpoint_id, OBJ_SEARCH_KEY | OBJ_MULTIPLE);
if (!mwi_subs) {
return 0;
}
for (; (mwi_sub = ao2_iterator_next(mwi_subs)) && !ret; ao2_cleanup(mwi_sub)) {
struct mwi_stasis_subscription *mwi_stasis;
mwi_stasis = ao2_find(mwi_sub->stasis_subs, mailbox, OBJ_SEARCH_KEY);
if (mwi_stasis) {
ret = 1;
ao2_cleanup(mwi_stasis);
}
}
ao2_iterator_destroy(mwi_subs);
return ret;
}
/*!
* \brief Determine if an endpoint is a candidate to be able to subscribe for MWI
*
* Currently, this just makes sure that the endpoint is not already receiving unsolicted
* MWI for any of an AOR's configured mailboxes.
*
* \param obj The AOR to which the endpoint is subscribing.
* \param arg The endpoint that is attempting to subscribe.
* \param flags Unused.
* \retval 0 Endpoint is a candidate to subscribe to MWI on the AOR.
* \retval -1 The endpoint cannot subscribe to MWI on the AOR.
*/
static int mwi_validate_for_aor(void *obj, void *arg, int flags)
{
struct ast_sip_aor *aor = obj;
struct ast_sip_endpoint *endpoint = arg;
char *mailboxes;
char *mailbox;
if (ast_strlen_zero(aor->mailboxes)) {
return 0;
}
mailboxes = ast_strdupa(aor->mailboxes);
while ((mailbox = strsep(&mailboxes, ","))) {
if (endpoint_receives_unsolicited_mwi_for_mailbox(endpoint, mailbox)) {
ast_log(LOG_NOTICE, "Endpoint '%s' already configured for unsolicited MWI for mailbox '%s'. "
"Denying MWI subscription to %s\n", ast_sorcery_object_get_id(endpoint), mailbox,
ast_sorcery_object_get_id(aor));
return -1;
}
}
return 0;
}
static int mwi_on_aor(void *obj, void *arg, int flags)
{
struct ast_sip_aor *aor = obj;
struct mwi_subscription *sub = arg;
char *mailboxes;
char *mailbox;
if (ast_strlen_zero(aor->mailboxes)) {
return 0;
}
mailboxes = ast_strdupa(aor->mailboxes);
while ((mailbox = strsep(&mailboxes, ","))) {
struct mwi_stasis_subscription *mwi_stasis_sub;
mwi_stasis_sub = mwi_stasis_subscription_alloc(mailbox, sub);
if (!mwi_stasis_sub) {
continue;
}
ao2_link(sub->stasis_subs, mwi_stasis_sub);
ao2_ref(mwi_stasis_sub, -1);
}
return 0;
}
static struct mwi_subscription *mwi_create_subscription(
struct ast_sip_endpoint *endpoint, struct ast_sip_subscription *sip_sub)
{
struct mwi_subscription *sub = mwi_subscription_alloc(endpoint, 1, sip_sub);
if (!sub) {
return NULL;
}
if (add_mwi_datastore(sub)) {
ast_log(LOG_WARNING, "Unable to add datastore for MWI subscription to %s\n",
sub->id);
ao2_ref(sub, -1);
return NULL;
}
return sub;
}
static struct mwi_subscription *mwi_subscribe_single(
struct ast_sip_endpoint *endpoint, struct ast_sip_subscription *sip_sub, const char *name)
{
struct ast_sip_aor *aor;
struct mwi_subscription *sub;
aor = ast_sip_location_retrieve_aor(name);
if (!aor) {
/*! I suppose it's possible for the AOR to disappear on us
* between accepting the subscription and sending the first
* NOTIFY...
*/
ast_log(LOG_WARNING, "Unable to locate aor %s. MWI subscription failed.\n",
name);
return NULL;
}
sub = mwi_create_subscription(endpoint, sip_sub);
if (sub) {
mwi_on_aor(aor, sub, 0);
}
ao2_ref(aor, -1);
return sub;
}
static struct mwi_subscription *mwi_subscribe_all(
struct ast_sip_endpoint *endpoint, struct ast_sip_subscription *sip_sub)
{
struct mwi_subscription *sub;
sub = mwi_create_subscription(endpoint, sip_sub);
if (!sub) {
return NULL;
}
ast_sip_for_each_aor(endpoint->aors, mwi_on_aor, sub);
return sub;
}
static int mwi_new_subscribe(struct ast_sip_endpoint *endpoint,
const char *resource)
{
RAII_VAR(struct ast_sip_aor *, aor, NULL, ao2_cleanup);
if (ast_strlen_zero(resource)) {
if (ast_sip_for_each_aor(endpoint->aors, mwi_validate_for_aor, endpoint)) {
return 500;
}
return 200;
}
aor = ast_sip_location_retrieve_aor(resource);
if (!aor) {
ast_log(LOG_WARNING, "Unable to locate aor %s. MWI subscription failed.\n",
resource);
return 404;
}
if (ast_strlen_zero(aor->mailboxes)) {
ast_log(LOG_NOTICE, "AOR %s has no configured mailboxes. MWI subscription failed.\n",
resource);
return 404;
}
if (mwi_validate_for_aor(aor, endpoint, 0)) {
return 500;
}
return 200;
}
