asterisk/res/res_pjsip_notify.c

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2023-05-25 18:45:57 +00:00
/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 2013, Digium, Inc.
*
* Kevin Harwell <kharwell@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>
<support_level>core</support_level>
***/
#include "asterisk.h"
#include <pjsip.h>
#include <pjsip_ua.h>
#include "asterisk/cli.h"
#include "asterisk/config.h"
#include "asterisk/manager.h"
#include "asterisk/module.h"
#include "asterisk/pbx.h"
#include "asterisk/res_pjsip.h"
#include "asterisk/res_pjsip_session.h"
#include "asterisk/sorcery.h"
/*** DOCUMENTATION
<manager name="PJSIPNotify" language="en_US">
<synopsis>
Send a NOTIFY to either an endpoint, an arbitrary URI, or inside a SIP dialog.
</synopsis>
<syntax>
<xi:include xpointer="xpointer(/docs/manager[@name='Login']/syntax/parameter[@name='ActionID'])" />
<parameter name="Endpoint" required="false">
<para>The endpoint to which to send the NOTIFY.</para>
</parameter>
<parameter name="URI" required="false">
<para>Abritrary URI to which to send the NOTIFY.</para>
</parameter>
<parameter name="channel" required="false">
<para>Channel name to send the NOTIFY. Must be a PJSIP channel.</para>
</parameter>
<parameter name="Variable" required="true">
<para>Appends variables as headers/content to the NOTIFY. If the variable is
named <literal>Content</literal>, then the value will compose the body
of the message if another variable sets <literal>Content-Type</literal>.
<replaceable>name</replaceable>=<replaceable>value</replaceable></para>
</parameter>
</syntax>
<description>
<para>Sends a NOTIFY to an endpoint, an arbitrary URI, or inside a SIP dialog.</para>
<para>All parameters for this event must be specified in the body of this
request via multiple <literal>Variable: name=value</literal> sequences.</para>
<note><para>One (and only one) of <literal>Endpoint</literal>,
<literal>URI</literal>, or <literal>Channel</literal> must be specified.
If <literal>URI</literal> is used, the default outbound endpoint will be used
to send the message. If the default outbound endpoint isn't configured, this command
can not send to an arbitrary URI.</para></note>
</description>
</manager>
<configInfo name="res_pjsip_notify" language="en_US">
<synopsis>Module that supports sending NOTIFY requests to endpoints from external sources</synopsis>
<configFile name="pjsip_notify.conf">
<configObject name="general">
<synopsis>Unused, but reserved.</synopsis>
</configObject>
<configObject name="notify">
<synopsis>Configuration of a NOTIFY request.</synopsis>
<description>
<para>Each key-value pair in a <literal>notify</literal>
configuration section defines either a SIP header to send
in the request or a line of content in the request message
body. A key of <literal>Content</literal> is treated
as part of the message body and is appended in sequential
order; any other header is treated as part of the SIP
request.</para>
</description>
<configOption name="">
<synopsis>A key/value pair to add to a NOTIFY request.</synopsis>
<description>
<para>If the key is <literal>Content</literal>,
it will be treated as part of the message body. Otherwise,
it will be added as a header in the NOTIFY request.</para>
<para>The following headers are reserved and cannot be
specified:</para>
<enumlist>
<enum name="Call-ID" />
<enum name="Contact" />
<enum name="CSeq" />
<enum name="To" />
<enum name="From" />
<enum name="Record-Route" />
<enum name="Route" />
<enum name="Via" />
</enumlist>
</description>
</configOption>
</configObject>
</configFile>
</configInfo>
***/
#define CONTENT_TYPE_SIZE 64
#define CONTENT_SIZE 512
/*!
* \internal
* \brief The configuration file containing NOTIFY payload types to send.
*/
static const char notify_config[] = "pjsip_notify.conf";
struct notify_option_item {
const char *name;
const char *value;
char buf[0];
};
struct notify_option {
/*! Contains header and/or content information */
struct ao2_container *items;
/*! The name of the notify option */
char name[0];
};
static int notify_option_hash(const void *obj, int flags)
{
const struct notify_option *option = obj;
return ast_str_case_hash(flags & OBJ_KEY ? obj : option->name);
}
static int notify_option_cmp(void *obj, void *arg, int flags)
{
struct notify_option *option1 = obj;
struct notify_option *option2 = arg;
const char *key = flags & OBJ_KEY ? arg : option2->name;
return strcasecmp(option1->name, key) ? 0 : CMP_MATCH;
}
static void notify_option_destroy(void *obj)
{
struct notify_option *option = obj;
ao2_cleanup(option->items);
}
static void *notify_option_alloc(const char *category)
{
int category_size = strlen(category) + 1;
struct notify_option *option = ao2_alloc(
sizeof(*option) + category_size, notify_option_destroy);
if (!option) {
return NULL;
}
ast_copy_string(option->name, category, category_size);
if (!(option->items = ao2_container_alloc_list(
AO2_ALLOC_OPT_LOCK_NOLOCK,
AO2_CONTAINER_ALLOC_OPT_DUPS_ALLOW, NULL, NULL))) {
ao2_cleanup(option);
return NULL;
}
return option;
}
static void *notify_option_find(struct ao2_container *container, const char *category)
{
return ao2_find(container, category, OBJ_KEY);
}
static int notify_option_handler(const struct aco_option *opt,
struct ast_variable *var, void *obj)
{
struct notify_option *option = obj;
int name_size = strlen(var->name) + 1;
int value_size = strlen(var->value) + 1;
RAII_VAR(struct notify_option_item *, item,
ao2_alloc(sizeof(*item) + name_size + value_size,
NULL), ao2_cleanup);
item->name = item->buf;
item->value = item->buf + name_size;
ast_copy_string(item->buf, var->name, name_size);
ast_copy_string(item->buf + name_size, var->value, value_size);
if (!ao2_link(option->items, item)) {
return -1;
}
return 0;
}
struct notify_cfg {
struct ao2_container *notify_options;
};
static void notify_cfg_destroy(void *obj)
{
struct notify_cfg *cfg = obj;
ao2_cleanup(cfg->notify_options);
}
static void *notify_cfg_alloc(void)
{
struct notify_cfg *cfg;
if (!(cfg = ao2_alloc(sizeof(*cfg), notify_cfg_destroy))) {
return NULL;
}
cfg->notify_options = ao2_container_alloc_hash(AO2_ALLOC_OPT_LOCK_NOLOCK, 0,
20, notify_option_hash, NULL, notify_option_cmp);
if (!cfg->notify_options) {
ao2_cleanup(cfg);
return NULL;
}
return cfg;
}
static struct aco_type notify_option = {
.type = ACO_ITEM,
.name = "notify",
.category_match = ACO_BLACKLIST_EXACT,
.category = "general",
.item_offset = offsetof(struct notify_cfg, notify_options),
.item_alloc = notify_option_alloc,
.item_find = notify_option_find
};
static struct aco_type *notify_options[] = ACO_TYPES(&notify_option);
static struct aco_file module_conf = {
.filename = notify_config,
.types = ACO_TYPES(&notify_option),
};
AO2_GLOBAL_OBJ_STATIC(globals);
CONFIG_INFO_STANDARD(notify_cfg, globals, notify_cfg_alloc,
.files = ACO_FILES(&module_conf)
);
/*!
* \internal
* \brief Structure to hold task data for notifications.
*/
struct notify_data {
/*! The endpoint being notified */
struct ast_sip_endpoint *endpoint;
/*! The info of headers, types and content */
void *info;
/*! Function to help build notify request */
void (*build_notify)(pjsip_tx_data *, void *);
};
/*!
* \internal
* \brief Destroy the notify CLI data releasing any resources.
*/
static void notify_cli_data_destroy(void *obj)
{
struct notify_data *data = obj;
ao2_cleanup(data->endpoint);
ao2_cleanup(data->info);
}
/*!
* \internal
* \brief Structure to hold task data for notifications (URI variant)
*/
struct notify_uri_data {
char *uri;
void *info;
void (*build_notify)(pjsip_tx_data *, void *);
};
/*!
* \internal
* \brief Structure to hold task data for notifications (channel variant)
*/
struct notify_channel_data {
struct ast_sip_session *session;
void *info;
void (*build_notify)(pjsip_tx_data *, void *);
};
static void notify_cli_uri_data_destroy(void *obj)
{
struct notify_uri_data *data = obj;
ast_free(data->uri);
ao2_cleanup(data->info);
}
/*!
* \internal
* \brief Destroy the notify CLI data releasing any resources (URI variant)
*/
static void build_cli_notify(pjsip_tx_data *tdata, void *info);
/*!
* \internal
* \brief Construct a notify data object for CLI.
*/
static struct notify_data* notify_cli_data_create(
struct ast_sip_endpoint *endpoint, void *info)
{
struct notify_data *data = ao2_alloc(sizeof(*data),
notify_cli_data_destroy);
if (!data) {
return NULL;
}
data->endpoint = endpoint;
ao2_ref(data->endpoint, +1);
data->info = info;
ao2_ref(data->info, +1);
data->build_notify = build_cli_notify;
return data;
}
/*!
* \internal
* \brief Construct a notify URI data object for CLI.
*/
static struct notify_uri_data* notify_cli_uri_data_create(
const char *uri, void *info)
{
struct notify_uri_data *data = ao2_alloc(sizeof(*data),
notify_cli_uri_data_destroy);
if (!data) {
return NULL;
}
data->uri = ast_strdup(uri);
if (!data->uri) {
ao2_ref(data, -1);
return NULL;
}
data->info = info;
ao2_ref(data->info, +1);
data->build_notify = build_cli_notify;
return data;
}
/*!
* \internal
* \brief Destroy the notify AMI data releasing any resources.
*/
static void notify_ami_data_destroy(void *obj)
{
struct notify_data *data = obj;
struct ast_variable *info = data->info;
ao2_cleanup(data->endpoint);
ast_variables_destroy(info);
}
/*!
* \internal
* \brief Destroy the notify AMI URI data releasing any resources.
*/
static void notify_ami_uri_data_destroy(void *obj)
{
struct notify_uri_data *data = obj;
struct ast_variable *info = data->info;
ast_free(data->uri);
ast_variables_destroy(info);
}
/*!
* \internal
* \brief Destroy the notify AMI channel data releasing any resources.
*/
static void notify_ami_channel_data_destroy(void *obj)
{
struct notify_channel_data *data = obj;
struct ast_variable *info = data->info;
ao2_cleanup(data->session);
ast_variables_destroy(info);
}
static void build_ami_notify(pjsip_tx_data *tdata, void *info);
/*!
* \internal
* \brief Construct a notify data object for AMI.
*/
static struct notify_data* notify_ami_data_create(
struct ast_sip_endpoint *endpoint, void *info)
{
struct notify_data *data = ao2_alloc(sizeof(*data),
notify_ami_data_destroy);
if (!data) {
return NULL;
}
data->endpoint = endpoint;
ao2_ref(data->endpoint, +1);
data->info = info;
data->build_notify = build_ami_notify;
return data;
}
/*!
* \internal
* \brief Construct a notify URI data object for AMI.
*/
static struct notify_uri_data* notify_ami_uri_data_create(
const char *uri, void *info)
{
struct notify_uri_data *data = ao2_alloc(sizeof(*data),
notify_ami_uri_data_destroy);
if (!data) {
return NULL;
}
data->uri = ast_strdup(uri);
if (!data->uri) {
ao2_ref(data, -1);
return NULL;
}
data->info = info;
data->build_notify = build_ami_notify;
return data;
}
/*!
* \internal
* \brief Construct a notify channel data object for AMI.
*/
static struct notify_channel_data *notify_ami_channel_data_create(
struct ast_sip_session *session, void *info)
{
struct notify_channel_data *data;
data = ao2_alloc_options(sizeof(*data), notify_ami_channel_data_destroy,
AO2_ALLOC_OPT_LOCK_NOLOCK);
if (!data) {
return NULL;
}
data->session = session;
data->info = info;
data->build_notify = build_ami_notify;
return data;
}
/*!
* \internal
* \brief Checks if the given header name is not allowed.
*
* \details Some headers are not allowed to be set by the user within the
* scope of a NOTIFY request. If the given var header name is
* found in the "not allowed" list then return true.
*/
static int not_allowed(const char *name)
{
int i;
static const char *names[] = {
"Call-ID",
"Contact",
"CSeq",
"To",
"From",
"Record-Route",
"Route",
"Request-URI",
"Via",
};
for (i = 0; i < ARRAY_LEN(names); ++i) {
if (!strcasecmp(name, names[i])) {
return 1;
}
}
return 0;
}
/*!
* \internal
* \brief Check if the given header can be added to a message more than once.
*/
static int multiple_headers_allowed(const char *name)
{
/* This can be extended to include additional headers */
return strcasecmp("Event", name);
}
/*!
* \internal
* \brief If a content type was specified add it and the content body to the
* NOTIFY request.
*/
static void build_notify_body(pjsip_tx_data *tdata, struct ast_str *content_type,
struct ast_str *content)
{
if (content_type) {
char *p;
struct ast_sip_body body;
if (content) {
body.body_text = ast_str_buffer(content);
}
body.type = ast_str_buffer(content_type);
if ((p = strchr(body.type, '/'))) {
*p++ = '\0';
body.subtype = p;
}
ast_sip_add_body(tdata, &body);
}
}
/*!
* \internal
* \brief Build the NOTIFY request adding content or header info.
*/
static void build_notify(pjsip_tx_data *tdata, const char *name, const char *value,
struct ast_str **content_type, struct ast_str **content)
{
if (not_allowed(name)) {
ast_log(LOG_WARNING, "Cannot specify %s header, "
"ignoring\n", name);
return;
}
if (!strcasecmp(name, "Content-type")) {
if (!(*content_type)) {
*content_type = ast_str_create(CONTENT_TYPE_SIZE);
}
ast_str_set(content_type, 0,"%s", value);
} else if (!strcasecmp(name, "Content")) {
if (!(*content)) {
*content = ast_str_create(CONTENT_SIZE);
}
if (ast_str_strlen(*content)) {
ast_str_append(content, 0, "\r\n");
}
ast_str_append(content, 0, "%s", value);
} else {
/* See if there is an existing one */
if (!multiple_headers_allowed(name)) {
pj_str_t hdr_name;
pj_cstr(&hdr_name, name);
if (pjsip_msg_find_hdr_by_name(tdata->msg, &hdr_name, NULL)) {
ast_log(LOG_ERROR, "Only one '%s' header can be added to a NOTIFY, "
"ignoring \"%s: %s\"\n", name, name, value);
return;
}
}
ast_sip_add_header(tdata, name, value);
}
}
/*!
* \internal
* \brief Build the NOTIFY request from CLI info adding header and content
* when specified.
*/
static void build_cli_notify(pjsip_tx_data *tdata, void *info)
{
struct notify_option *option = info;
RAII_VAR(struct ast_str *, content_type, NULL, ast_free);
RAII_VAR(struct ast_str *, content, NULL, ast_free);
struct notify_option_item *item;
struct ao2_iterator i = ao2_iterator_init(option->items, 0);
while ((item = ao2_iterator_next(&i))) {
build_notify(tdata, item->name, item->value,
&content_type, &content);
ao2_cleanup(item);
}
ao2_iterator_destroy(&i);
build_notify_body(tdata, content_type, content);
}
/*!
* \internal
* \brief Build the NOTIFY request from AMI info adding header and content
* when specified.
*/
static void build_ami_notify(pjsip_tx_data *tdata, void *info)
{
struct ast_variable *vars = info;
RAII_VAR(struct ast_str *, content_type, NULL, ast_free);
RAII_VAR(struct ast_str *, content, NULL, ast_free);
struct ast_variable *i;
for (i = vars; i; i = i->next) {
if (!strcasecmp(i->name, "Content-Length")) {
ast_log(LOG_NOTICE, "It is not necessary to specify Content-Length, ignoring.\n");
continue;
}
build_notify(tdata, i->name, i->value,
&content_type, &content);
}
build_notify_body(tdata, content_type, content);
}
/*!
* \internal
* \brief Build and send a NOTIFY request to a contact.
*/
static int notify_contact(void *obj, void *arg, int flags)
{
struct ast_sip_contact *contact = obj;
struct notify_data *data = arg;
pjsip_tx_data *tdata;
if (ast_sip_create_request("NOTIFY", NULL, data->endpoint,
NULL, contact, &tdata)) {
ast_log(LOG_WARNING, "SIP NOTIFY - Unable to create request for "
"contact %s\n", contact->uri);
return -1;
}
ast_sip_add_header(tdata, "Subscription-State", "terminated");
data->build_notify(tdata, data->info);
if (ast_sip_send_request(tdata, NULL, data->endpoint, NULL, NULL)) {
ast_log(LOG_ERROR, "SIP NOTIFY - Unable to send request for "
"contact %s\n", contact->uri);
return -1;
}
return 0;
}
/*!
* \internal
* \brief Send a NOTIFY request to the endpoint.
*
* \details Iterates over an endpoint's AORs sending a NOTIFY request
* with the appropriate payload information to each contact.
*/
static int notify_endpoint(void *obj)
{
RAII_VAR(struct notify_data *, data, obj, ao2_cleanup);
char *aor_name, *aors;
if (ast_strlen_zero(data->endpoint->aors)) {
ast_log(LOG_WARNING, "Unable to NOTIFY - "
"endpoint has no configured AORs\n");
return -1;
}
aors = ast_strdupa(data->endpoint->aors);
while ((aor_name = ast_strip(strsep(&aors, ",")))) {
RAII_VAR(struct ast_sip_aor *, aor,
ast_sip_location_retrieve_aor(aor_name), ao2_cleanup);
RAII_VAR(struct ao2_container *, contacts, NULL, ao2_cleanup);
if (!aor || !(contacts = ast_sip_location_retrieve_aor_contacts(aor))) {
continue;
}
ao2_callback(contacts, OBJ_NODATA, notify_contact, data);
}
return 0;
}
/*!
* \internal
* \brief Send a notify request to the URI.
*/
static int notify_uri(void *obj)
{
RAII_VAR(struct notify_uri_data *, data, obj, ao2_cleanup);
RAII_VAR(struct ast_sip_endpoint *, endpoint,
ast_sip_default_outbound_endpoint(), ao2_cleanup);
pjsip_tx_data *tdata;
if (!endpoint) {
ast_log(LOG_WARNING, "No default outbound endpoint set, can not send "
"NOTIFY requests to arbitrary URIs.\n");
return -1;
}
if (ast_strlen_zero(data->uri)) {
ast_log(LOG_WARNING, "Unable to NOTIFY - URI is blank.\n");
return -1;
}
if (ast_sip_create_request("NOTIFY", NULL, endpoint,
data->uri, NULL, &tdata)) {
ast_log(LOG_WARNING, "SIP NOTIFY - Unable to create request for "
"uri %s\n", data->uri);
return -1;
}
ast_sip_add_header(tdata, "Subscription-State", "terminated");
data->build_notify(tdata, data->info);
if (ast_sip_send_request(tdata, NULL, endpoint, NULL, NULL)) {
ast_log(LOG_ERROR, "SIP NOTIFY - Unable to send request for "
"uri %s\n", data->uri);
return -1;
}
return 0;
}
/*!
* \internal
* \brief Send a notify request to a channel.
*/
static int notify_channel(void *obj)
{
RAII_VAR(struct notify_channel_data *, data, obj, ao2_cleanup);
pjsip_tx_data *tdata;
struct pjsip_dialog *dlg;
if (!data->session->channel
|| !data->session->inv_session
|| data->session->inv_session->state < PJSIP_INV_STATE_EARLY
|| data->session->inv_session->state == PJSIP_INV_STATE_DISCONNECTED) {
return -1;
}
ast_debug(1, "Sending notify on channel %s\n", ast_channel_name(data->session->channel));
dlg = data->session->inv_session->dlg;
if (ast_sip_create_request("NOTIFY", dlg, NULL, NULL, NULL, &tdata)) {
return -1;
}
ast_sip_add_header(tdata, "Subscription-State", "terminated");
data->build_notify(tdata, data->info);
if (ast_sip_send_request(tdata, dlg, NULL, NULL, NULL)) {
return -1;
}
return 0;
}
enum notify_result {
SUCCESS,
INVALID_ENDPOINT,
INVALID_CHANNEL,
ALLOC_ERROR,
TASK_PUSH_ERROR
};
typedef struct notify_data *(*task_data_create)(
struct ast_sip_endpoint *, void *info);
typedef struct notify_uri_data *(*task_uri_data_create)(
const char *uri, void *info);
typedef struct notify_channel_data *(*task_channel_data_create)(
struct ast_sip_session *session, void *info);
/*!
* \internal
* \brief Send a NOTIFY request to the endpoint within a threaded task.
*/
static enum notify_result push_notify(const char *endpoint_name, void *info,
task_data_create data_create)
{
RAII_VAR(struct ast_sip_endpoint *, endpoint, NULL, ao2_cleanup);
struct notify_data *data;
if (!(endpoint = ast_sorcery_retrieve_by_id(
ast_sip_get_sorcery(), "endpoint", endpoint_name))) {
return INVALID_ENDPOINT;
}
if (!(data = data_create(endpoint, info))) {
return ALLOC_ERROR;
}
if (ast_sip_push_task(NULL, notify_endpoint, data)) {
ao2_cleanup(data);
return TASK_PUSH_ERROR;
}
return SUCCESS;
}
/*!
* \internal
* \brief Send a NOTIFY request to the URI within an threaded task.
*/
static enum notify_result push_notify_uri(const char *uri, void *info,
task_uri_data_create data_create)
{
struct notify_uri_data *data;
if (!(data = data_create(uri, info))) {
return ALLOC_ERROR;
}
if (ast_sip_push_task(NULL, notify_uri, data)) {
ao2_cleanup(data);
return TASK_PUSH_ERROR;
}
return SUCCESS;
}
/*!
* \internal
* \brief Send a NOTIFY request in a channel within an threaded task.
*/
static enum notify_result push_notify_channel(const char *channel_name, void *info,
task_channel_data_create data_create)
{
struct notify_channel_data *data;
struct ast_channel *ch;
struct ast_sip_session *session;
struct ast_sip_channel_pvt *ch_pvt;
/* note: this increases the refcount of the channel */
ch = ast_channel_get_by_name(channel_name);
if (!ch) {
ast_debug(1, "No channel found with name %s", channel_name);
return INVALID_CHANNEL;
}
if (strcmp(ast_channel_tech(ch)->type, "PJSIP")) {
ast_log(LOG_WARNING, "Channel was a non-PJSIP channel: %s\n", channel_name);
ast_channel_unref(ch);
return INVALID_CHANNEL;
}
ast_channel_lock(ch);
ch_pvt = ast_channel_tech_pvt(ch);
session = ch_pvt->session;
if (!session || !session->inv_session
|| session->inv_session->state < PJSIP_INV_STATE_EARLY
|| session->inv_session->state == PJSIP_INV_STATE_DISCONNECTED) {
ast_debug(1, "No active session for channel %s\n", channel_name);
ast_channel_unlock(ch);
ast_channel_unref(ch);
return INVALID_CHANNEL;
}
ao2_ref(session, +1);
ast_channel_unlock(ch);
/* don't keep a reference to the channel, we've got a reference to the session */
ast_channel_unref(ch);
/*
* data_create will take ownership of the session,
* and take care of releasing the ref.
*/
data = data_create(session, info);
if (!data) {
ao2_ref(session, -1);
return ALLOC_ERROR;
}
if (ast_sip_push_task(session->serializer, notify_channel, data)) {
ao2_ref(data, -1);
return TASK_PUSH_ERROR;
}
return SUCCESS;
}
/*!
* \internal
* \brief Do completion on the endpoint.
*/
static char *cli_complete_endpoint(const char *word)
{
int wordlen = strlen(word);
struct ao2_container * endpoints;
struct ast_sip_endpoint *endpoint;
struct ao2_iterator i;
endpoints = ast_sorcery_retrieve_by_prefix(ast_sip_get_sorcery(),
"endpoint", word, wordlen);
if (endpoints == NULL) {
return NULL;
}
i = ao2_iterator_init(endpoints, 0);
while ((endpoint = ao2_iterator_next(&i))) {
ast_cli_completion_add(
ast_strdup(ast_sorcery_object_get_id(endpoint)));
ao2_cleanup(endpoint);
}
ao2_iterator_destroy(&i);
ao2_ref(endpoints, -1);
return NULL;
}
/*!
* \internal
* \brief Do completion on the notify CLI command.
*/
static char *cli_complete_notify(const char *line, const char *word,
int pos, int state, int using_uri)
{
char *c = NULL;
if (pos == 3) {
int which = 0;
int wordlen = strlen(word);
RAII_VAR(struct notify_cfg *, cfg,
ao2_global_obj_ref(globals), ao2_cleanup);
struct notify_option *option;
/* do completion for notify type */
struct ao2_iterator i = ao2_iterator_init(cfg->notify_options, 0);
while ((option = ao2_iterator_next(&i))) {
if (!strncasecmp(word, option->name, wordlen) && ++which > state) {
c = ast_strdup(option->name);
}
ao2_cleanup(option);
if (c) {
break;
}
}
ao2_iterator_destroy(&i);
return c;
}
if (pos == 4) {
int wordlen = strlen(word);
if (ast_strlen_zero(word)) {
if (state == 0) {
c = ast_strdup("endpoint");
} else if (state == 1) {
c = ast_strdup("uri");
}
} else if (state == 0) {
if (!strncasecmp(word, "endpoint", wordlen)) {
c = ast_strdup("endpoint");
} else if (!strncasecmp(word, "uri", wordlen)) {
c = ast_strdup("uri");
}
}
return c;
}
return pos > 4 && !using_uri ? cli_complete_endpoint(word) : NULL;
}
/*!
* \internal
* \brief CLI command to send a SIP notify to an endpoint.
*
* \details Attempts to match the "type" given in the CLI command to a
* configured one. If found, sends a NOTIFY to the endpoint
* with the associated payload.
*/
static char *cli_notify(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
RAII_VAR(struct notify_cfg *, cfg, NULL, ao2_cleanup);
RAII_VAR(struct notify_option *, option, NULL, ao2_cleanup);
int i;
int using_uri = 0;
switch (cmd) {
case CLI_INIT:
e->command = "pjsip send notify";
e->usage =
"Usage: pjsip send notify <type> {endpoint|uri} <peer> [<peer>...]\n"
" Send a NOTIFY request to an endpoint\n"
" Message types are defined in pjsip_notify.conf\n";
return NULL;
case CLI_GENERATE:
if (a->argc > 4 && (!strcasecmp(a->argv[4], "uri"))) {
using_uri = 1;
}
return cli_complete_notify(a->line, a->word, a->pos, a->n, using_uri);
}
if (a->argc < 6) {
return CLI_SHOWUSAGE;
}
if (!strcasecmp(a->argv[4], "uri")) {
using_uri = 1;
} else if (strcasecmp(a->argv[4], "endpoint")) {
return CLI_SHOWUSAGE;
}
cfg = ao2_global_obj_ref(globals);
if (!(option = notify_option_find(cfg->notify_options, a->argv[3])))
{
ast_cli(a->fd, "Unable to find notify type '%s'\n",
a->argv[3]);
return CLI_FAILURE;
}
for (i = 5; i < a->argc; ++i) {
ast_cli(a->fd, "Sending NOTIFY of type '%s' to '%s'\n",
a->argv[3], a->argv[i]);
switch (using_uri ? push_notify_uri(a->argv[i], option, notify_cli_uri_data_create) :
push_notify(a->argv[i], option, notify_cli_data_create)) {
case INVALID_ENDPOINT:
ast_cli(a->fd, "Unable to retrieve endpoint %s\n",
a->argv[i]);
break;
case ALLOC_ERROR:
ast_cli(a->fd, "Unable to allocate NOTIFY task data\n");
return CLI_FAILURE;
case TASK_PUSH_ERROR:
ast_cli(a->fd, "Unable to push NOTIFY task\n");
return CLI_FAILURE;
default:
break;
}
}
return CLI_SUCCESS;
}
static struct ast_cli_entry cli_options[] = {
AST_CLI_DEFINE(cli_notify, "Send a NOTIFY request to a SIP endpoint")
};
/*!
* \internal
* \brief Completes SIPNotify AMI command in Endpoint mode.
*/
static void manager_notify_endpoint(struct mansession *s,
const struct message *m, const char *endpoint_name)
{
struct ast_variable *vars = astman_get_variables_order(m, ORDER_NATURAL);
if (!strncasecmp(endpoint_name, "sip/", 4)) {
endpoint_name += 4;
}
if (!strncasecmp(endpoint_name, "pjsip/", 6)) {
endpoint_name += 6;
}
switch (push_notify(endpoint_name, vars, notify_ami_data_create)) {
case INVALID_CHANNEL:
/* Shouldn't be possible. */
ast_assert(0);
break;
case INVALID_ENDPOINT:
ast_variables_destroy(vars);
astman_send_error_va(s, m, "Unable to retrieve endpoint %s",
endpoint_name);
break;
case ALLOC_ERROR:
ast_variables_destroy(vars);
astman_send_error(s, m, "Unable to allocate NOTIFY task data");
break;
case TASK_PUSH_ERROR:
/* Don't need to destroy vars since it is handled by cleanup in push_notify */
astman_send_error(s, m, "Unable to push NOTIFY task");
break;
case SUCCESS:
astman_send_ack(s, m, "NOTIFY sent");
break;
}
}
/*!
* \internal
* \brief Completes SIPNotify AMI command in URI mode.
*/
static void manager_notify_uri(struct mansession *s,
const struct message *m, const char *uri)
{
struct ast_variable *vars = astman_get_variables_order(m, ORDER_NATURAL);
switch (push_notify_uri(uri, vars, notify_ami_uri_data_create)) {
case INVALID_CHANNEL:
/* Shouldn't be possible. */
ast_assert(0);
break;
case INVALID_ENDPOINT:
/* Shouldn't be possible. */
ast_assert(0);
break;
case ALLOC_ERROR:
ast_variables_destroy(vars);
astman_send_error(s, m, "Unable to allocate NOTIFY task data");
break;
case TASK_PUSH_ERROR:
/* Don't need to destroy vars since it is handled by cleanup in push_notify_uri */
astman_send_error(s, m, "Unable to push Notify task");
break;
case SUCCESS:
astman_send_ack(s, m, "NOTIFY sent");
break;
}
}
/*!
* \internal
* \brief Completes SIPNotify AMI command in channel mode.
*/
static void manager_notify_channel(struct mansession *s,
const struct message *m, const char *channel)
{
struct ast_variable *vars = astman_get_variables_order(m, ORDER_NATURAL);
switch (push_notify_channel(channel, vars, notify_ami_channel_data_create)) {
case INVALID_CHANNEL:
ast_variables_destroy(vars);
astman_send_error(s, m, "Channel not found");
break;
case INVALID_ENDPOINT:
/* Shouldn't be possible. */
ast_assert(0);
break;
case ALLOC_ERROR:
ast_variables_destroy(vars);
astman_send_error(s, m, "Unable to allocate NOTIFY task data");
break;
case TASK_PUSH_ERROR:
/* Don't need to destroy vars since it is handled by cleanup in push_notify_channel */
astman_send_error(s, m, "Unable to push Notify task");
break;
case SUCCESS:
astman_send_ack(s, m, "NOTIFY sent");
break;
}
}
/*!
* \internal
* \brief AMI entry point to send a SIP notify to an endpoint.
*/
static int manager_notify(struct mansession *s, const struct message *m)
{
const char *endpoint_name = astman_get_header(m, "Endpoint");
const char *uri = astman_get_header(m, "URI");
const char *channel = astman_get_header(m, "Channel");
int count = 0;
if (!ast_strlen_zero(endpoint_name)) {
++count;
}
if (!ast_strlen_zero(uri)) {
++count;
}
if (!ast_strlen_zero(channel)) {
++count;
}
if (1 < count) {
astman_send_error(s, m,
"PJSIPNotify requires either an endpoint name, a SIP URI, or a channel. "
"You must use only one of them.");
} else if (!ast_strlen_zero(endpoint_name)) {
manager_notify_endpoint(s, m, endpoint_name);
} else if (!ast_strlen_zero(uri)) {
manager_notify_uri(s, m, uri);
} else if (!ast_strlen_zero(channel)) {
manager_notify_channel(s, m, channel);
} else {
astman_send_error(s, m,
"PJSIPNotify requires either an endpoint name, a SIP URI, or a channel.");
}
return 0;
}
static int load_module(void)
{
if (aco_info_init(&notify_cfg)) {
return AST_MODULE_LOAD_DECLINE;
}
aco_option_register_custom(&notify_cfg, "", ACO_PREFIX, notify_options,
"", notify_option_handler, 0);
if (aco_process_config(&notify_cfg, 0)) {
aco_info_destroy(&notify_cfg);
return AST_MODULE_LOAD_DECLINE;
}
ast_cli_register_multiple(cli_options, ARRAY_LEN(cli_options));
ast_manager_register_xml("PJSIPNotify", EVENT_FLAG_SYSTEM, manager_notify);
return AST_MODULE_LOAD_SUCCESS;
}
static int reload_module(void)
{
if (aco_process_config(&notify_cfg, 1) == ACO_PROCESS_ERROR) {
return AST_MODULE_LOAD_DECLINE;
}
return 0;
}
static int unload_module(void)
{
ast_manager_unregister("PJSIPNotify");
ast_cli_unregister_multiple(cli_options, ARRAY_LEN(cli_options));
aco_info_destroy(&notify_cfg);
ao2_global_obj_release(globals);
return 0;
}
AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "CLI/AMI PJSIP NOTIFY Support",
.support_level = AST_MODULE_SUPPORT_CORE,
.load = load_module,
.reload = reload_module,
.unload = unload_module,
.load_pri = AST_MODPRI_APP_DEPEND,
.requires = "res_pjsip",
);