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Diffstat (limited to 'res/res_pjsip_publish_asterisk.c')
| -rw-r--r-- | res/res_pjsip_publish_asterisk.c | 927 |
1 files changed, 927 insertions, 0 deletions
diff --git a/res/res_pjsip_publish_asterisk.c b/res/res_pjsip_publish_asterisk.c new file mode 100644 index 000000000..8d4d8510d --- /dev/null +++ b/res/res_pjsip_publish_asterisk.c @@ -0,0 +1,927 @@ +/* + * Asterisk -- An open source telephony toolkit. + * + * Copyright (C) 2014, Digium, Inc. + * + * Joshua Colp <jcolp@digium.com> + * + * See http://www.asterisk.org for more information about + * the Asterisk project. Please do not directly contact + * any of the maintainers of this project for assistance; + * the project provides a web site, mailing lists and IRC + * channels for your use. + * + * This program is free software, distributed under the terms of + * the GNU General Public License Version 2. See the LICENSE file + * at the top of the source tree. + */ + +/*** MODULEINFO + <depend>pjproject</depend> + <depend>res_pjsip</depend> + <depend>res_pjsip_outbound_publish</depend> + <support_level>core</support_level> + ***/ + +#include "asterisk.h" + +#include <regex.h> + +#include <pjsip.h> +#include <pjsip_simple.h> + +#include "asterisk/res_pjsip.h" +#include "asterisk/res_pjsip_outbound_publish.h" +#include "asterisk/res_pjsip_pubsub.h" +#include "asterisk/module.h" +#include "asterisk/logger.h" +#include "asterisk/app.h" + +/*** DOCUMENTATION + <configInfo name="res_pjsip_publish_asterisk" language="en_US"> + <synopsis>SIP resource for inbound and outbound Asterisk event publications</synopsis> + <description><para> + <emphasis>Inbound and outbound Asterisk event publication</emphasis> + </para> + <para>This module allows <literal>res_pjsip</literal> to send and receive Asterisk event publications.</para> + </description> + <configFile name="pjsip.conf"> + <configObject name="asterisk-publication"> + <synopsis>The configuration for inbound Asterisk event publication</synopsis> + <description><para> + Publish is <emphasis>COMPLETELY</emphasis> separate from the rest of + <literal>pjsip.conf</literal>. + </para></description> + <configOption name="devicestate_publish"> + <synopsis>Optional name of a publish item that can be used to publish a request for full device state information.</synopsis> + </configOption> + <configOption name="mailboxstate_publish"> + <synopsis>Optional name of a publish item that can be used to publish a request for full mailbox state information.</synopsis> + </configOption> + <configOption name="device_state" default="no"> + <synopsis>Whether we should permit incoming device state events.</synopsis> + </configOption> + <configOption name="device_state_filter"> + <synopsis>Optional regular expression used to filter what devices we accept events for.</synopsis> + </configOption> + <configOption name="mailbox_state" default="no"> + <synopsis>Whether we should permit incoming mailbox state events.</synopsis> + </configOption> + <configOption name="mailbox_state_filter"> + <synopsis>Optional regular expression used to filter what mailboxes we accept events for.</synopsis> + </configOption> + <configOption name="type"> + <synopsis>Must be of type 'asterisk-publication'.</synopsis> + </configOption> + </configObject> + </configFile> + </configInfo> + ***/ + +/*! \brief Structure which contains Asterisk device state publisher state information */ +struct asterisk_devicestate_publisher_state { + /*! \brief The publish client to send PUBLISH messages on */ + struct ast_sip_outbound_publish_client *client; + /*! \brief Device state subscription */ + struct stasis_subscription *device_state_subscription; + /*! \brief Regex used for filtering outbound device state */ + regex_t device_state_regex; + /*! \brief Device state should be filtered */ + unsigned int device_state_filter; +}; + +/*! \brief Structure which contains Asterisk mailbox publisher state information */ +struct asterisk_mwi_publisher_state { + /*! \brief The publish client to send PUBLISH messages on */ + struct ast_sip_outbound_publish_client *client; + /*! \brief Mailbox state subscription */ + struct stasis_subscription *mailbox_state_subscription; + /*! \brief Regex used for filtering outbound mailbox state */ + regex_t mailbox_state_regex; + /*! \brief Mailbox state should be filtered */ + unsigned int mailbox_state_filter; +}; + +/*! \brief Structure which contains Asterisk publication information */ +struct asterisk_publication_config { + /*! \brief Sorcery object details */ + SORCERY_OBJECT(details); + /*! \brief Stringfields */ + AST_DECLARE_STRING_FIELDS( + /*! \brief Optional name of a device state publish item, used to request the remote side update us */ + AST_STRING_FIELD(devicestate_publish); + /*! \brief Optional name of a mailbox state publish item, used to request the remote side update us */ + AST_STRING_FIELD(mailboxstate_publish); + ); + /*! \brief Accept inbound device state events */ + unsigned int device_state; + /*! \brief Regex used for filtering inbound device state */ + regex_t device_state_regex; + /*! \brief Device state should be filtered */ + unsigned int device_state_filter; + /*! \brief Accept inbound mailbox state events */ + unsigned int mailbox_state; + /*! \brief Regex used for filtering inbound mailbox state */ + regex_t mailbox_state_regex; + /*! \brief Mailbox state should be filtered */ + unsigned int mailbox_state_filter; +}; + +/*! \brief Destroy callback for Asterisk devicestate publisher state information from datastore */ +static void asterisk_devicestate_publisher_state_destroy(void *obj) +{ + struct asterisk_devicestate_publisher_state *publisher_state = obj; + + ao2_cleanup(publisher_state->client); + + if (publisher_state->device_state_filter) { + regfree(&publisher_state->device_state_regex); + } +} + +/*! \brief Datastore for attaching devicestate publisher state information */ +static const struct ast_datastore_info asterisk_devicestate_publisher_state_datastore = { + .type = "asterisk-devicestate-publisher", + .destroy = asterisk_devicestate_publisher_state_destroy, +}; + +/*! \brief Destroy callback for Asterisk mwi publisher state information from datastore */ +static void asterisk_mwi_publisher_state_destroy(void *obj) +{ + struct asterisk_mwi_publisher_state *publisher_state = obj; + + ao2_cleanup(publisher_state->client); + + if (publisher_state->mailbox_state_filter) { + regfree(&publisher_state->mailbox_state_regex); + } +} + +/*! \brief Datastore for attaching devicestate publisher state information */ +static const struct ast_datastore_info asterisk_mwi_publisher_state_datastore = { + .type = "asterisk-mwi-publisher", + .destroy = asterisk_mwi_publisher_state_destroy, +}; + +/*! + * \brief Callback function for device state events + * \param ast_event + * \param data void pointer to ast_client structure + * \return void + */ +static void asterisk_publisher_devstate_cb(void *data, struct stasis_subscription *sub, struct stasis_message *msg) +{ + struct ast_datastore *datastore = data; + struct asterisk_devicestate_publisher_state *publisher_state = datastore->data; + struct ast_device_state_message *dev_state; + char eid_str[20]; + struct ast_json *json; + char *text; + struct ast_sip_body body = { + .type = "application", + .subtype = "json", + }; + + if (!stasis_subscription_is_subscribed(sub) || ast_device_state_message_type() != stasis_message_type(msg)) { + return; + } + + dev_state = stasis_message_data(msg); + if (!dev_state->eid || ast_eid_cmp(&ast_eid_default, dev_state->eid)) { + /* If the event is aggregate or didn't originate from this server, don't send it out. */ + return; + } + + if (publisher_state->device_state_filter && regexec(&publisher_state->device_state_regex, dev_state->device, 0, NULL, 0)) { + /* Outgoing device state has been filtered and the device name does not match */ + return; + } + + ast_eid_to_str(eid_str, sizeof(eid_str), &ast_eid_default); + json = ast_json_pack( + "{ s: s, s: s, s: s, s: i, s:s }", + "type", "devicestate", + "device", dev_state->device, + "state", ast_devstate_str(dev_state->state), + "cachable", dev_state->cachable, + "eid", eid_str); + if (!json) { + return; + } + + text = ast_json_dump_string(json); + if (!text) { + ast_json_unref(json); + return; + } + body.body_text = text; + + ast_sip_publish_client_send(publisher_state->client, &body); + + ast_json_free(text); + ast_json_unref(json); +} + +/*! + * \brief Callback function for mailbox state events + * \param ast_event + * \param data void pointer to ast_client structure + * \return void + */ +static void asterisk_publisher_mwistate_cb(void *data, struct stasis_subscription *sub, struct stasis_message *msg) +{ + struct ast_datastore *datastore = data; + struct asterisk_mwi_publisher_state *publisher_state = datastore->data; + struct ast_mwi_state *mwi_state; + char eid_str[20]; + struct ast_json *json; + char *text; + struct ast_sip_body body = { + .type = "application", + .subtype = "json", + }; + + if (!stasis_subscription_is_subscribed(sub) || ast_mwi_state_type() != stasis_message_type(msg)) { + return; + } + + mwi_state = stasis_message_data(msg); + if (ast_eid_cmp(&ast_eid_default, &mwi_state->eid)) { + /* If the event is aggregate or didn't originate from this server, don't send it out. */ + return; + } + + if (publisher_state->mailbox_state_filter && regexec(&publisher_state->mailbox_state_regex, mwi_state->uniqueid, 0, NULL, 0)) { + /* Outgoing mailbox state has been filtered and the uniqueid does not match */ + return; + } + + ast_eid_to_str(eid_str, sizeof(eid_str), &ast_eid_default); + json = ast_json_pack( + "{ s: s, s: s, s: i, s: i, s:s }", + "type", "mailboxstate", + "uniqueid", mwi_state->uniqueid, + "old", mwi_state->old_msgs, + "new", mwi_state->new_msgs, + "eid", eid_str); + if (!json) { + return; + } + + text = ast_json_dump_string(json); + if (!text) { + ast_json_unref(json); + return; + } + body.body_text = text; + + ast_sip_publish_client_send(publisher_state->client, &body); + + ast_json_free(text); + ast_json_unref(json); +} + +static int cached_devstate_cb(void *obj, void *arg, int flags) +{ + struct stasis_message *msg = obj; + struct ast_datastore *datastore = arg; + struct asterisk_devicestate_publisher_state *publisher_state = datastore->data; + + asterisk_publisher_devstate_cb(arg, publisher_state->device_state_subscription, msg); + + return 0; +} + +static int cached_mwistate_cb(void *obj, void *arg, int flags) +{ + struct stasis_message *msg = obj; + struct ast_datastore *datastore = arg; + struct asterisk_mwi_publisher_state *publisher_state = datastore->data; + + asterisk_publisher_mwistate_cb(arg, publisher_state->mailbox_state_subscription, msg); + + return 0; +} + +static int build_regex(regex_t *regex, const char *text) +{ + int res; + + if ((res = regcomp(regex, text, REG_EXTENDED | REG_ICASE | REG_NOSUB))) { + size_t len = regerror(res, regex, NULL, 0); + char buf[len]; + regerror(res, regex, buf, len); + ast_log(LOG_ERROR, "Could not compile regex '%s': %s\n", text, buf); + return -1; + } + + return 0; +} + +static int asterisk_start_devicestate_publishing(struct ast_sip_outbound_publish *configuration, + struct ast_sip_outbound_publish_client *client) +{ + RAII_VAR(struct ast_datastore *, datastore, NULL, ao2_cleanup); + struct asterisk_devicestate_publisher_state *publisher_state; + const char *value; + struct ao2_container *cached; + + datastore = ast_sip_publish_client_alloc_datastore(&asterisk_devicestate_publisher_state_datastore, + "asterisk-devicestate-publisher"); + if (!datastore) { + return -1; + } + + publisher_state = ast_calloc(1, sizeof(struct asterisk_devicestate_publisher_state)); + if (!publisher_state) { + return -1; + } + datastore->data = publisher_state; + + value = ast_sorcery_object_get_extended(configuration, "device_state_filter"); + if (!ast_strlen_zero(value)) { + if (build_regex(&publisher_state->device_state_regex, value)) { + return -1; + } + publisher_state->device_state_filter = 1; + } + + publisher_state->client = ao2_bump(client); + + if (ast_sip_publish_client_add_datastore(client, datastore)) { + return -1; + } + + publisher_state->device_state_subscription = stasis_subscribe(ast_device_state_topic_all(), + asterisk_publisher_devstate_cb, ao2_bump(datastore)); + if (!publisher_state->device_state_subscription) { + ast_sip_publish_client_remove_datastore(client, "asterisk-devicestate-publisher"); + ao2_ref(datastore, -1); + return -1; + } + + cached = stasis_cache_dump(ast_device_state_cache(), NULL); + ao2_callback(cached, OBJ_NODATA, cached_devstate_cb, datastore); + ao2_ref(cached, -1); + + return 0; +} + +static int asterisk_stop_devicestate_publishing(struct ast_sip_outbound_publish_client *client) +{ + RAII_VAR(struct ast_datastore *, datastore, ast_sip_publish_client_get_datastore(client, "asterisk-devicestate-publisher"), + ao2_cleanup); + struct asterisk_devicestate_publisher_state *publisher_state; + + if (!datastore) { + return 0; + } + + publisher_state = datastore->data; + if (publisher_state->device_state_subscription) { + stasis_unsubscribe_and_join(publisher_state->device_state_subscription); + ao2_ref(datastore, -1); + } + + ast_sip_publish_client_remove_datastore(client, "asterisk-devicestate-publisher"); + + return 0; +} + +struct ast_sip_event_publisher_handler asterisk_devicestate_publisher_handler = { + .event_name = "asterisk-devicestate", + .start_publishing = asterisk_start_devicestate_publishing, + .stop_publishing = asterisk_stop_devicestate_publishing, +}; + +static int asterisk_start_mwi_publishing(struct ast_sip_outbound_publish *configuration, + struct ast_sip_outbound_publish_client *client) +{ + RAII_VAR(struct ast_datastore *, datastore, NULL, ao2_cleanup); + struct asterisk_mwi_publisher_state *publisher_state; + const char *value; + struct ao2_container *cached; + + datastore = ast_sip_publish_client_alloc_datastore(&asterisk_mwi_publisher_state_datastore, "asterisk-mwi-publisher"); + if (!datastore) { + return -1; + } + + publisher_state = ast_calloc(1, sizeof(struct asterisk_mwi_publisher_state)); + if (!publisher_state) { + return -1; + } + datastore->data = publisher_state; + + value = ast_sorcery_object_get_extended(configuration, "mailbox_state_filter"); + if (!ast_strlen_zero(value)) { + if (build_regex(&publisher_state->mailbox_state_regex, value)) { + return -1; + } + publisher_state->mailbox_state_filter = 1; + } + + publisher_state->client = ao2_bump(client); + + if (ast_sip_publish_client_add_datastore(client, datastore)) { + return -1; + } + + publisher_state->mailbox_state_subscription = stasis_subscribe(ast_mwi_topic_all(), + asterisk_publisher_mwistate_cb, ao2_bump(datastore)); + if (!publisher_state->mailbox_state_subscription) { + ast_sip_publish_client_remove_datastore(client, "asterisk-mwi-publisher"); + ao2_ref(datastore, -1); + return -1; + } + + cached = stasis_cache_dump(ast_mwi_state_cache(), NULL); + ao2_callback(cached, OBJ_NODATA, cached_mwistate_cb, datastore); + ao2_ref(cached, -1); + + return 0; +} + +static int asterisk_stop_mwi_publishing(struct ast_sip_outbound_publish_client *client) +{ + RAII_VAR(struct ast_datastore *, datastore, ast_sip_publish_client_get_datastore(client, "asterisk-mwi-publisher"), + ao2_cleanup); + struct asterisk_mwi_publisher_state *publisher_state; + + if (!datastore) { + return 0; + } + + publisher_state = datastore->data; + if (publisher_state->mailbox_state_subscription) { + stasis_unsubscribe_and_join(publisher_state->mailbox_state_subscription); + ao2_ref(datastore, -1); + } + + ast_sip_publish_client_remove_datastore(client, "asterisk-mwi-publisher"); + + return 0; +} + +struct ast_sip_event_publisher_handler asterisk_mwi_publisher_handler = { + .event_name = "asterisk-mwi", + .start_publishing = asterisk_start_mwi_publishing, + .stop_publishing = asterisk_stop_mwi_publishing, +}; + +static int asterisk_publication_new(struct ast_sip_endpoint *endpoint, const char *resource, const char *event_configuration) +{ + RAII_VAR(struct asterisk_publication_config *, config, ast_sorcery_retrieve_by_id(ast_sip_get_sorcery(), "asterisk-publication", + event_configuration), ao2_cleanup); + + /* If no inbound Asterisk publication configuration exists reject the PUBLISH */ + if (!config) { + return 404; + } + + return 200; +} + +static int asterisk_publication_devicestate(struct ast_sip_publication *pub, struct asterisk_publication_config *config, + struct ast_eid *pubsub_eid, struct ast_json *json) +{ + const char *device = ast_json_string_get(ast_json_object_get(json, "device")); + const char *state = ast_json_string_get(ast_json_object_get(json, "state")); + int cachable = ast_json_integer_get(ast_json_object_get(json, "cachable")); + + if (!config->device_state) { + ast_debug(2, "Received device state event for resource '%s' but it is not configured to accept them\n", + ast_sorcery_object_get_id(config)); + return 0; + } + + if (ast_strlen_zero(device) || ast_strlen_zero(state)) { + ast_debug(1, "Received incomplete device state event for resource '%s'\n", + ast_sorcery_object_get_id(config)); + return -1; + } + + if (config->device_state_filter && regexec(&config->device_state_regex, device, 0, NULL, 0)) { + ast_debug(2, "Received device state on resource '%s' for device '%s' but it has been filtered out\n", + ast_sorcery_object_get_id(config), device); + return 0; + } + + ast_publish_device_state_full(device, ast_devstate_val(state), + cachable == AST_DEVSTATE_CACHABLE ? AST_DEVSTATE_CACHABLE : AST_DEVSTATE_NOT_CACHABLE, + pubsub_eid); + + return 0; +} + +static int asterisk_publication_mailboxstate(struct ast_sip_publication *pub, struct asterisk_publication_config *config, + struct ast_eid *pubsub_eid, struct ast_json *json) +{ + const char *uniqueid = ast_json_string_get(ast_json_object_get(json, "uniqueid")); + int old_msgs = ast_json_integer_get(ast_json_object_get(json, "old")); + int new_msgs = ast_json_integer_get(ast_json_object_get(json, "new")); + char *item_id; + const char *mailbox; + + if (!config->mailbox_state) { + ast_debug(2, "Received mailbox state event for resource '%s' but it is not configured to accept them\n", + ast_sorcery_object_get_id(config)); + return 0; + } + + if (ast_strlen_zero(uniqueid)) { + ast_debug(1, "Received incomplete mailbox state event for resource '%s'\n", + ast_sorcery_object_get_id(config)); + return -1; + } + + if (config->mailbox_state_filter && regexec(&config->mailbox_state_regex, uniqueid, 0, NULL, 0)) { + ast_debug(2, "Received mailbox state on resource '%s' for uniqueid '%s' but it has been filtered out\n", + ast_sorcery_object_get_id(config), uniqueid); + return 0; + } + + item_id = ast_strdupa(uniqueid); + mailbox = strsep(&item_id, "@"); + + ast_publish_mwi_state_full(mailbox, item_id, new_msgs, old_msgs, NULL, pubsub_eid); + + return 0; +} + +static int asterisk_publication_devicestate_refresh(struct ast_sip_publication *pub, + struct asterisk_publication_config *config, struct ast_eid *pubsub_eid, struct ast_json *json) +{ + struct ast_sip_outbound_publish_client *client; + struct ast_datastore *datastore; + struct ao2_container *cached; + + if (ast_strlen_zero(config->devicestate_publish)) { + return 0; + } + + client = ast_sip_publish_client_get(config->devicestate_publish); + if (!client) { + ast_log(LOG_ERROR, "Received refresh request for devicestate on publication '%s' but publish '%s' is not available\n", + ast_sorcery_object_get_id(config), config->devicestate_publish); + return 0; + } + + datastore = ast_sip_publish_client_get_datastore(client, "asterisk-devicestate-publisher"); + if (!datastore) { + ao2_ref(client, -1); + return 0; + } + + cached = stasis_cache_dump(ast_device_state_cache(), NULL); + if (cached) { + ao2_callback(cached, OBJ_NODATA, cached_devstate_cb, datastore); + ao2_ref(cached, -1); + } + ao2_ref(client, -1); + ao2_ref(datastore, -1); + + return 0; +} + +static int asterisk_publication_devicestate_state_change(struct ast_sip_publication *pub, pjsip_msg_body *body, + enum ast_sip_publish_state state) +{ + RAII_VAR(struct asterisk_publication_config *, config, ast_sorcery_retrieve_by_id(ast_sip_get_sorcery(), "asterisk-publication", + ast_sip_publication_get_event_configuration(pub)), ao2_cleanup); + RAII_VAR(struct ast_json *, json, NULL, ast_json_unref); + const char *eid, *type; + struct ast_eid pubsub_eid; + int res = -1; + + /* If no configuration exists for this publication it has most likely been removed, so drop this immediately */ + if (!config) { + return -1; + } + + /* If no body exists this is a refresh and can be ignored */ + if (!body) { + return 0; + } + + /* We only accept JSON for content */ + if (pj_strcmp2(&body->content_type.type, "application") || + pj_strcmp2(&body->content_type.subtype, "json")) { + ast_debug(2, "Received unsupported content type for Asterisk event on resource '%s'\n", + ast_sorcery_object_get_id(config)); + return -1; + } + + json = ast_json_load_buf(body->data, body->len, NULL); + if (!json) { + ast_debug(1, "Received unparseable JSON event for resource '%s'\n", + ast_sorcery_object_get_id(config)); + return -1; + } + + eid = ast_json_string_get(ast_json_object_get(json, "eid")); + if (!eid) { + ast_debug(1, "Received event without eid for resource '%s'\n", + ast_sorcery_object_get_id(config)); + return -1; + } + ast_str_to_eid(&pubsub_eid, eid); + + type = ast_json_string_get(ast_json_object_get(json, "type")); + if (!type) { + ast_debug(1, "Received event without type for resource '%s'\n", + ast_sorcery_object_get_id(config)); + return -1; + } else if (!strcmp(type, "devicestate")) { + res = asterisk_publication_devicestate(pub, config, &pubsub_eid, json); + } else if (!strcmp(type, "refresh")) { + res = asterisk_publication_devicestate_refresh(pub, config, &pubsub_eid, json); + } + + return res; +} + +static int asterisk_publication_mwi_refresh(struct ast_sip_publication *pub, + struct asterisk_publication_config *config, struct ast_eid *pubsub_eid, struct ast_json *json) +{ + struct ast_sip_outbound_publish_client *client; + struct ast_datastore *datastore; + struct ao2_container *cached; + + if (ast_strlen_zero(config->mailboxstate_publish)) { + return 0; + } + + client = ast_sip_publish_client_get(config->mailboxstate_publish); + if (!client) { + ast_log(LOG_ERROR, "Received refresh request for mwi state on publication '%s' but publish '%s' is not available\n", + ast_sorcery_object_get_id(config), config->mailboxstate_publish); + return 0; + } + + datastore = ast_sip_publish_client_get_datastore(client, "asterisk-mwi-publisher"); + if (!datastore) { + ao2_ref(client, -1); + return 0; + } + + cached = stasis_cache_dump(ast_mwi_state_cache(), NULL); + if (cached) { + ao2_callback(cached, OBJ_NODATA, cached_mwistate_cb, datastore); + ao2_ref(cached, -1); + } + ao2_ref(client, -1); + ao2_ref(datastore, -1); + + return 0; +} + +static int asterisk_publication_mwi_state_change(struct ast_sip_publication *pub, pjsip_msg_body *body, + enum ast_sip_publish_state state) +{ + RAII_VAR(struct asterisk_publication_config *, config, ast_sorcery_retrieve_by_id(ast_sip_get_sorcery(), "asterisk-publication", + ast_sip_publication_get_event_configuration(pub)), ao2_cleanup); + RAII_VAR(struct ast_json *, json, NULL, ast_json_unref); + const char *eid, *type; + struct ast_eid pubsub_eid; + int res = -1; + + /* If no configuration exists for this publication it has most likely been removed, so drop this immediately */ + if (!config) { + return -1; + } + + /* If no body exists this is a refresh and can be ignored */ + if (!body) { + return 0; + } + + /* We only accept JSON for content */ + if (pj_strcmp2(&body->content_type.type, "application") || + pj_strcmp2(&body->content_type.subtype, "json")) { + ast_debug(2, "Received unsupported content type for Asterisk event on resource '%s'\n", + ast_sorcery_object_get_id(config)); + return -1; + } + + json = ast_json_load_buf(body->data, body->len, NULL); + if (!json) { + ast_debug(1, "Received unparseable JSON event for resource '%s'\n", + ast_sorcery_object_get_id(config)); + return -1; + } + + eid = ast_json_string_get(ast_json_object_get(json, "eid")); + if (!eid) { + ast_debug(1, "Received event without eid for resource '%s'\n", + ast_sorcery_object_get_id(config)); + return -1; + } + ast_str_to_eid(&pubsub_eid, eid); + + type = ast_json_string_get(ast_json_object_get(json, "type")); + if (!type) { + ast_debug(1, "Received event without type for resource '%s'\n", + ast_sorcery_object_get_id(config)); + return -1; + } else if (!strcmp(type, "mailboxstate")) { + res = asterisk_publication_mailboxstate(pub, config, &pubsub_eid, json); + } else if (!strcmp(type, "refresh")) { + res = asterisk_publication_mwi_refresh(pub, config, &pubsub_eid, json); + } + + return res; +} + +static int send_refresh_cb(void *obj, void *arg, int flags) +{ + struct asterisk_publication_config *config = obj; + struct ast_sip_outbound_publish_client *client; + + if (!ast_strlen_zero(config->devicestate_publish)) { + client = ast_sip_publish_client_get(config->devicestate_publish); + if (client) { + ast_sip_publish_client_send(client, arg); + ao2_ref(client, -1); + } + } + + if (!ast_strlen_zero(config->mailboxstate_publish)) { + client = ast_sip_publish_client_get(config->mailboxstate_publish); + if (client) { + ast_sip_publish_client_send(client, arg); + ao2_ref(client, -1); + } + } + + return 0; +} + +/*! \brief Internal function to send refresh requests to all publications */ +static void asterisk_publication_send_refresh(void) +{ + struct ao2_container *publications = ast_sorcery_retrieve_by_fields(ast_sip_get_sorcery(), "asterisk-publication", AST_RETRIEVE_FLAG_MULTIPLE | AST_RETRIEVE_FLAG_ALL, NULL); + char eid_str[20]; + struct ast_json *json; + char *text; + struct ast_sip_body body = { + .type = "application", + .subtype = "json", + }; + + if (!publications) { + return; + } + + ast_eid_to_str(eid_str, sizeof(eid_str), &ast_eid_default); + json = ast_json_pack( + "{ s: s, s: s }", + "type", "refresh", + "eid", eid_str); + if (!json) { + ao2_ref(publications, -1); + return; + } + + text = ast_json_dump_string(json); + if (!text) { + ast_json_unref(json); + ao2_ref(publications, -1); + return; + } + body.body_text = text; + + ao2_callback(publications, OBJ_NODATA, send_refresh_cb, &body); + + ast_json_free(text); + ast_json_unref(json); + ao2_ref(publications, -1); +} + +struct ast_sip_publish_handler asterisk_devicestate_publication_handler = { + .event_name = "asterisk-devicestate", + .new_publication = asterisk_publication_new, + .publication_state_change = asterisk_publication_devicestate_state_change, +}; + +struct ast_sip_publish_handler asterisk_mwi_publication_handler = { + .event_name = "asterisk-mwi", + .new_publication = asterisk_publication_new, + .publication_state_change = asterisk_publication_mwi_state_change, +}; + +/*! \brief Destructor function for Asterisk publication configuration */ +static void asterisk_publication_config_destroy(void *obj) +{ + struct asterisk_publication_config *config = obj; + + ast_string_field_free_memory(config); +} + +/*! \brief Allocator function for Asterisk publication configuration */ +static void *asterisk_publication_config_alloc(const char *name) +{ + struct asterisk_publication_config *config = ast_sorcery_generic_alloc(sizeof(*config), + asterisk_publication_config_destroy); + + if (!config || ast_string_field_init(config, 256)) { + ao2_cleanup(config); + return NULL; + } + + return config; +} + +static int regex_filter_handler(const struct aco_option *opt, struct ast_variable *var, void *obj) +{ + struct asterisk_publication_config *config = obj; + int res = -1; + + if (ast_strlen_zero(var->value)) { + return 0; + } + + if (!strcmp(var->name, "device_state_filter")) { + if (!(res = build_regex(&config->device_state_regex, var->value))) { + config->device_state_filter = 1; + } + } else if (!strcmp(var->name, "mailbox_state_filter")) { + if (!(res = build_regex(&config->mailbox_state_regex, var->value))) { + config->mailbox_state_filter = 1; + } + } + + return res; +} + +static int load_module(void) +{ + ast_sorcery_apply_default(ast_sip_get_sorcery(), "asterisk-publication", "config", "pjsip.conf,criteria=type=asterisk-publication"); + + if (ast_sorcery_object_register(ast_sip_get_sorcery(), "asterisk-publication", asterisk_publication_config_alloc, NULL, NULL)) { + return AST_MODULE_LOAD_DECLINE; + } + + ast_sorcery_object_field_register(ast_sip_get_sorcery(), "asterisk-publication", "type", "", OPT_NOOP_T, 0, 0); + ast_sorcery_object_field_register(ast_sip_get_sorcery(), "asterisk-publication", "devicestate_publish", "", OPT_STRINGFIELD_T, 0, STRFLDSET(struct asterisk_publication_config, devicestate_publish)); + ast_sorcery_object_field_register(ast_sip_get_sorcery(), "asterisk-publication", "mailboxstate_publish", "", OPT_STRINGFIELD_T, 0, STRFLDSET(struct asterisk_publication_config, mailboxstate_publish)); + ast_sorcery_object_field_register(ast_sip_get_sorcery(), "asterisk-publication", "device_state", "no", OPT_BOOL_T, 1, FLDSET(struct asterisk_publication_config, device_state)); + ast_sorcery_object_field_register_custom(ast_sip_get_sorcery(), "asterisk-publication", "device_state_filter", "", regex_filter_handler, NULL, NULL, 0, 0); + ast_sorcery_object_field_register(ast_sip_get_sorcery(), "asterisk-publication", "mailbox_state", "no", OPT_BOOL_T, 1, FLDSET(struct asterisk_publication_config, mailbox_state)); + ast_sorcery_object_field_register_custom(ast_sip_get_sorcery(), "asterisk-publication", "mailbox_state_filter", "", regex_filter_handler, NULL, NULL, 0, 0); + ast_sorcery_reload_object(ast_sip_get_sorcery(), "asterisk-publication"); + + if (ast_sip_register_publish_handler(&asterisk_devicestate_publication_handler)) { + ast_log(LOG_WARNING, "Unable to register event publication handler %s\n", + asterisk_devicestate_publication_handler.event_name); + return AST_MODULE_LOAD_DECLINE; + } + if (ast_sip_register_publish_handler(&asterisk_mwi_publication_handler)) { + ast_log(LOG_WARNING, "Unable to register event publication handler %s\n", + asterisk_mwi_publication_handler.event_name); + ast_sip_unregister_publish_handler(&asterisk_devicestate_publication_handler); + return AST_MODULE_LOAD_DECLINE; + } + if (ast_sip_register_event_publisher_handler(&asterisk_devicestate_publisher_handler)) { + ast_log(LOG_WARNING, "Unable to register event publisher handler %s\n", + asterisk_devicestate_publisher_handler.event_name); + ast_sip_unregister_publish_handler(&asterisk_devicestate_publication_handler); + ast_sip_unregister_publish_handler(&asterisk_mwi_publication_handler); + return AST_MODULE_LOAD_DECLINE; + } + if (ast_sip_register_event_publisher_handler(&asterisk_mwi_publisher_handler)) { + ast_log(LOG_WARNING, "Unable to register event publisher handler %s\n", + asterisk_mwi_publisher_handler.event_name); + ast_sip_unregister_event_publisher_handler(&asterisk_mwi_publisher_handler); + ast_sip_unregister_publish_handler(&asterisk_devicestate_publication_handler); + ast_sip_unregister_publish_handler(&asterisk_mwi_publication_handler); + return AST_MODULE_LOAD_DECLINE; + } + + asterisk_publication_send_refresh(); + + return AST_MODULE_LOAD_SUCCESS; +} + +static int reload_module(void) +{ + ast_sorcery_reload_object(ast_sip_get_sorcery(), "asterisk-publication"); + asterisk_publication_send_refresh(); + return 0; +} + +static int unload_module(void) +{ + ast_sip_unregister_publish_handler(&asterisk_devicestate_publication_handler); + ast_sip_unregister_publish_handler(&asterisk_mwi_publication_handler); + ast_sip_unregister_event_publisher_handler(&asterisk_devicestate_publisher_handler); + ast_sip_unregister_event_publisher_handler(&asterisk_mwi_publisher_handler); + return 0; +} + +AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "PJSIP Asterisk Event PUBLISH Support", + .load = load_module, + .reload = reload_module, + .unload = unload_module, + .load_pri = AST_MODPRI_CHANNEL_DEPEND, +); |