asterisk/res/res_pjsip_caller_id.c

849 lines
26 KiB
C

/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 2013, Digium, Inc.
*
* Mark Michelson <mmichelson@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_session</depend>
<support_level>core</support_level>
***/
#include "asterisk.h"
#include <pjsip.h>
#include <pjsip_ua.h>
#include "asterisk/res_pjsip.h"
#include "asterisk/res_pjsip_session.h"
#include "asterisk/channel.h"
#include "asterisk/module.h"
#include "asterisk/callerid.h"
#include "asterisk/conversions.h"
/*!
* \internal
* \brief Set an ast_party_id name and number based on an identity header.
* \param hdr From, P-Asserted-Identity, or Remote-Party-ID header on incoming message
* \param[out] id The ID to set data on
*/
static void set_id_from_hdr(pjsip_fromto_hdr *hdr, struct ast_party_id *id)
{
char cid_name[AST_CHANNEL_NAME];
char cid_num[AST_CHANNEL_NAME];
pjsip_name_addr *id_name_addr = (pjsip_name_addr *) hdr->uri;
char *semi;
ast_copy_pj_str(cid_name, &id_name_addr->display, sizeof(cid_name));
ast_copy_pj_str(cid_num, ast_sip_pjsip_uri_get_username(hdr->uri), sizeof(cid_num));
/* Always truncate caller-id number at a semicolon. */
semi = strchr(cid_num, ';');
if (semi) {
/*
* We need to be able to handle URI's looking like
* "sip:1235557890;phone-context=national@x.x.x.x;user=phone"
*
* Where the uri->user field will result in:
* "1235557890;phone-context=national"
*
* People don't care about anything after the semicolon
* showing up on their displays even though the RFC
* allows the semicolon.
*/
*semi = '\0';
}
ast_free(id->name.str);
id->name.str = ast_strdup(cid_name);
if (!ast_strlen_zero(cid_name)) {
id->name.valid = 1;
}
ast_free(id->number.str);
id->number.str = ast_strdup(cid_num);
if (!ast_strlen_zero(cid_num)) {
id->number.valid = 1;
}
}
/*!
* \internal
* \brief Get a P-Asserted-Identity or Remote-Party-ID header from an incoming message
*
* This function will parse the header as if it were a From header. This allows for us
* to easily manipulate the URI, as well as add, modify, or remove parameters from the
* header
*
* \param rdata The incoming message
* \param header_name The name of the ID header to find
* \retval NULL No ID header present or unable to parse ID header
* \retval non-NULL The parsed ID header
*/
static pjsip_fromto_hdr *get_id_header(pjsip_rx_data *rdata, const pj_str_t *header_name)
{
static const pj_str_t from = { "From", 4 };
pj_str_t header_content;
pjsip_fromto_hdr *parsed_hdr;
pjsip_generic_string_hdr *ident = pjsip_msg_find_hdr_by_name(rdata->msg_info.msg,
header_name, NULL);
int parsed_len;
if (!ident) {
return NULL;
}
pj_strdup_with_null(rdata->tp_info.pool, &header_content, &ident->hvalue);
parsed_hdr = pjsip_parse_hdr(rdata->tp_info.pool, &from, header_content.ptr,
pj_strlen(&header_content), &parsed_len);
if (!parsed_hdr) {
return NULL;
}
return parsed_hdr;
}
/*!
* \internal
* \brief Set an ANI2 integer based on OLI data in a From header
*
* This uses the contents of a From header in order to set Originating Line information.
*
* \param rdata The incoming message
* \param ani2 The ANI2 field to set
* \retval 0 Successfully parsed OLI
* \retval non-zero Could not parse OLI
*/
static int set_id_from_oli(pjsip_rx_data *rdata, int *ani2)
{
char oli[AST_CHANNEL_NAME];
pjsip_param *oli1, *oli2, *oli3;
static const pj_str_t oli_str1 = { "isup-oli", 8 };
static const pj_str_t oli_str2 = { "ss7-oli", 7 };
static const pj_str_t oli_str3 = { "oli", 3 };
pjsip_fromto_hdr *from = pjsip_msg_find_hdr(rdata->msg_info.msg,
PJSIP_H_FROM, rdata->msg_info.msg->hdr.next);
if (!from) {
return -1; /* This had better not happen */
}
if ((oli1 = pjsip_param_find(&from->other_param, &oli_str1))) {
ast_copy_pj_str(oli, &oli1->value, sizeof(oli));
} else if ((oli2 = pjsip_param_find(&from->other_param, &oli_str2))) {
ast_copy_pj_str(oli, &oli2->value, sizeof(oli));
} else if ((oli3 = pjsip_param_find(&from->other_param, &oli_str3))) {
ast_copy_pj_str(oli, &oli3->value, sizeof(oli));
} else {
return -1;
}
return ast_str_to_int(oli, ani2);
}
/*!
* \internal
* \brief Set an ast_party_id structure based on data in a P-Asserted-Identity header
*
* This makes use of \ref set_id_from_hdr for setting name and number. It uses
* the contents of a Privacy header in order to set presentation information.
*
* \param rdata The incoming message
* \param[out] id The ID to set
* \retval 0 Successfully set the party ID
* \retval non-zero Could not set the party ID
*/
static int set_id_from_pai(pjsip_rx_data *rdata, struct ast_party_id *id)
{
static const pj_str_t pai_str = { "P-Asserted-Identity", 19 };
static const pj_str_t privacy_str = { "Privacy", 7 };
pjsip_fromto_hdr *pai_hdr = get_id_header(rdata, &pai_str);
pjsip_generic_string_hdr *privacy;
if (!pai_hdr) {
return -1;
}
set_id_from_hdr(pai_hdr, id);
if (!id->number.valid) {
return -1;
}
privacy = pjsip_msg_find_hdr_by_name(rdata->msg_info.msg, &privacy_str, NULL);
if (!privacy || !pj_stricmp2(&privacy->hvalue, "none")) {
id->number.presentation = AST_PRES_ALLOWED_USER_NUMBER_NOT_SCREENED;
id->name.presentation = AST_PRES_ALLOWED_USER_NUMBER_NOT_SCREENED;
} else {
id->number.presentation = AST_PRES_PROHIB_USER_NUMBER_NOT_SCREENED;
id->name.presentation = AST_PRES_PROHIB_USER_NUMBER_NOT_SCREENED;
}
return 0;
}
/*!
* \internal
* \brief Set an ast_party_id structure based on data in a Remote-Party-ID header
*
* This makes use of \ref set_id_from_hdr for setting name and number. It uses
* the privacy and screen parameters in order to set presentation information.
*
* \param rdata The incoming message
* \param[out] id The ID to set
* \retval 0 Succesfully set the party ID
* \retval non-zero Could not set the party ID
*/
static int set_id_from_rpid(pjsip_rx_data *rdata, struct ast_party_id *id)
{
static const pj_str_t rpid_str = { "Remote-Party-ID", 15 };
static const pj_str_t privacy_str = { "privacy", 7 };
static const pj_str_t screen_str = { "screen", 6 };
pjsip_fromto_hdr *rpid_hdr = get_id_header(rdata, &rpid_str);
pjsip_param *screen;
pjsip_param *privacy;
if (!rpid_hdr) {
return -1;
}
set_id_from_hdr(rpid_hdr, id);
if (!id->number.valid) {
return -1;
}
privacy = pjsip_param_find(&rpid_hdr->other_param, &privacy_str);
screen = pjsip_param_find(&rpid_hdr->other_param, &screen_str);
if (privacy && !pj_stricmp2(&privacy->value, "full")) {
id->number.presentation = AST_PRES_RESTRICTED;
id->name.presentation = AST_PRES_RESTRICTED;
} else {
id->number.presentation = AST_PRES_ALLOWED;
id->name.presentation = AST_PRES_ALLOWED;
}
if (screen && !pj_stricmp2(&screen->value, "yes")) {
id->number.presentation |= AST_PRES_USER_NUMBER_PASSED_SCREEN;
id->name.presentation |= AST_PRES_USER_NUMBER_PASSED_SCREEN;
} else {
id->number.presentation |= AST_PRES_USER_NUMBER_UNSCREENED;
id->name.presentation |= AST_PRES_USER_NUMBER_UNSCREENED;
}
return 0;
}
/*!
* \internal
* \brief Set an ast_party_id structure based on data in a From
*
* This makes use of \ref set_id_from_hdr for setting name and number. It uses
* no information from the message in order to set privacy. It relies on endpoint
* configuration for privacy information.
*
* \param rdata The incoming message
* \param[out] id The ID to set
* \retval 0 Succesfully set the party ID
* \retval non-zero Could not set the party ID
*/
static int set_id_from_from(struct pjsip_rx_data *rdata, struct ast_party_id *id)
{
pjsip_fromto_hdr *from = pjsip_msg_find_hdr(rdata->msg_info.msg,
PJSIP_H_FROM, rdata->msg_info.msg->hdr.next);
if (!from) {
/* This had better not happen */
return -1;
}
set_id_from_hdr(from, id);
if (!id->number.valid) {
return -1;
}
return 0;
}
/*!
* \internal
* \brief Determine if a connected line update should be queued
*
* This uses information about the session and the ID that would be queued
* in the connected line update in order to determine if we should queue
* a connected line update.
*
* \param session The session whose channel we wish to queue the connected line update on
* \param id The identification information that would be queued on the connected line update
* \retval 0 We should not queue a connected line update
* \retval non-zero We should queue a connected line update
*/
static int should_queue_connected_line_update(const struct ast_sip_session *session, const struct ast_party_id *id)
{
/* Invalid number means no update */
if (!id->number.valid) {
return 0;
}
/* If the session has never communicated an update or if the
* new ID has a different number than the session, then we
* should queue an update
*/
if (ast_strlen_zero(session->id.number.str) ||
strcmp(session->id.number.str, id->number.str)) {
return 1;
}
/* By making it to this point, it means the number is not enough
* to determine if an update should be sent. Now we look at
* the name
*/
/* If the number couldn't warrant an update and the name is
* invalid, then no update
*/
if (!id->name.valid) {
return 0;
}
/* If the name has changed or we don't have a name set for the
* session, then we should send an update
*/
if (ast_strlen_zero(session->id.name.str) ||
strcmp(session->id.name.str, id->name.str)) {
return 1;
}
/* Neither the name nor the number have changed. No update */
return 0;
}
/*!
* \internal
* \brief Queue a connected line update on a session's channel.
* \param session The session whose channel should have the connected line update queued upon.
* \param id The identification information to place in the connected line update
*/
static void queue_connected_line_update(struct ast_sip_session *session, const struct ast_party_id *id)
{
struct ast_party_connected_line connected;
struct ast_party_caller caller;
/* Fill connected line information */
ast_party_connected_line_init(&connected);
connected.id = *id;
connected.id.tag = session->endpoint->id.self.tag;
connected.source = AST_CONNECTED_LINE_UPDATE_SOURCE_ANSWER;
/* Save to channel driver copy */
ast_party_id_copy(&session->id, &connected.id);
/* Update our channel CALLERID() */
ast_party_caller_init(&caller);
caller.id = connected.id;
caller.ani = connected.id;
caller.ani2 = ast_channel_caller(session->channel)->ani2;
ast_channel_set_caller_event(session->channel, &caller, NULL);
/* Tell peer about the new connected line information. */
ast_channel_queue_connected_line_update(session->channel, &connected, NULL);
}
/*!
* \internal
* \brief Make updates to connected line information based on an incoming request.
*
* This will get identity information from an incoming request. Once the identification is
* retrieved, we will check if the new information warrants a connected line update and queue
* a connected line update if so.
*
* \param session The session on which we received an incoming request
* \param rdata The incoming request
*/
static void update_incoming_connected_line(struct ast_sip_session *session, pjsip_rx_data *rdata)
{
struct ast_party_id id;
if (!session->endpoint->id.trust_connected_line
|| !session->endpoint->id.trust_inbound) {
return;
}
ast_party_id_init(&id);
if (!set_id_from_pai(rdata, &id) || !set_id_from_rpid(rdata, &id)) {
if (should_queue_connected_line_update(session, &id)) {
queue_connected_line_update(session, &id);
}
}
ast_party_id_free(&id);
}
/*!
* \internal
* \brief Session supplement callback on an incoming INVITE request
*
* If we are receiving an initial INVITE, then we will set the session's identity
* based on the INVITE or configured endpoint values. If we are receiving a reinvite,
* then we will potentially queue a connected line update via the \ref update_incoming_connected_line
* function
*
* \param session The session that has received an INVITE
* \param rdata The incoming INVITE
*/
static int caller_id_incoming_request(struct ast_sip_session *session, pjsip_rx_data *rdata)
{
if (!session->channel) {
int ani2;
/*
* Since we have no channel this must be the initial inbound
* INVITE. Set the session ID directly because the channel
* has not been created yet.
*/
if (session->endpoint->id.trust_inbound
&& (!set_id_from_pai(rdata, &session->id)
|| !set_id_from_rpid(rdata, &session->id))) {
ast_free(session->id.tag);
session->id.tag = ast_strdup(session->endpoint->id.self.tag);
return 0;
}
ast_party_id_copy(&session->id, &session->endpoint->id.self);
if (!session->endpoint->id.self.number.valid) {
set_id_from_from(rdata, &session->id);
}
if (!set_id_from_oli(rdata, &ani2)) {
session->ani2 = ani2;
} else {
session->ani2 = 0;
}
} else {
/*
* ReINVITE or UPDATE. Check for changes to the ID and queue
* a connected line update if necessary.
*/
update_incoming_connected_line(session, rdata);
}
return 0;
}
/*!
* \internal
* \brief Session supplement callback on INVITE response
*
* INVITE responses could result in queuing connected line updates.
*
* \param session The session on which communication is happening
* \param rdata The incoming INVITE response
*/
static void caller_id_incoming_response(struct ast_sip_session *session, pjsip_rx_data *rdata)
{
if (!session->channel) {
return;
}
update_incoming_connected_line(session, rdata);
}
/*!
* \internal
* \brief Create an identity header for an outgoing message
* \param hdr_name The name of the header to create
* \param base
* \param tdata The message to place the header on
* \param id The identification information for the new header
* \return newly-created header
*/
static pjsip_fromto_hdr *create_new_id_hdr(const pj_str_t *hdr_name, pjsip_fromto_hdr *base, pjsip_tx_data *tdata, const struct ast_party_id *id)
{
pjsip_fromto_hdr *id_hdr;
pjsip_name_addr *id_name_addr;
pjsip_sip_uri *id_uri;
id_hdr = pjsip_from_hdr_create(tdata->pool);
id_hdr->type = PJSIP_H_OTHER;
id_hdr->sname = id_hdr->name = *hdr_name;
id_name_addr = pjsip_uri_clone(tdata->pool, base->uri);
id_uri = pjsip_uri_get_uri(id_name_addr->uri);
if (id->name.valid && !ast_strlen_zero(id->name.str)) {
int name_buf_len = strlen(id->name.str) * 2 + 1;
char *name_buf = ast_alloca(name_buf_len);
ast_escape_quoted(id->name.str, name_buf, name_buf_len);
pj_strdup2(tdata->pool, &id_name_addr->display, name_buf);
} else {
/*
* We need to clear the remnants of the clone or it'll be left set.
* pj_strdup2 is safe to call with a NULL src and it resets both slen and ptr.
*/
pj_strdup2(tdata->pool, &id_name_addr->display, NULL);
}
if (id->number.valid) {
pj_strdup2(tdata->pool, &id_uri->user, id->number.str);
} else {
/* Similar to name, make sure the number is also cleared when invalid */
pj_strdup2(tdata->pool, &id_uri->user, NULL);
}
id_hdr->uri = (pjsip_uri *) id_name_addr;
return id_hdr;
}
/*!
* \internal
* \brief Add a Privacy header to an outbound message
*
* When sending a P-Asserted-Identity header, if privacy is requested, then we
* will need to indicate such by adding a Privacy header. Similarly, if no
* privacy is requested, and a Privacy header already exists on the message,
* then the old Privacy header should be removed.
*
* \param tdata The outbound message to add the Privacy header to
* \param id The id information used to determine privacy
*/
static void add_privacy_header(pjsip_tx_data *tdata, const struct ast_party_id *id)
{
static const pj_str_t pj_privacy_name = { "Privacy", 7 };
static const pj_str_t pj_privacy_value = { "id", 2 };
pjsip_hdr *old_privacy;
old_privacy = pjsip_msg_find_hdr_by_name(tdata->msg, &pj_privacy_name, NULL);
if ((ast_party_id_presentation(id) & AST_PRES_RESTRICTION) == AST_PRES_ALLOWED) {
if (old_privacy) {
pj_list_erase(old_privacy);
}
} else if (!old_privacy) {
pjsip_generic_string_hdr *privacy_hdr = pjsip_generic_string_hdr_create(
tdata->pool, &pj_privacy_name, &pj_privacy_value);
pjsip_msg_add_hdr(tdata->msg, (pjsip_hdr *)privacy_hdr);
}
}
/*!
* \internal
* \brief Add a P-Asserted-Identity header to an outbound message
* \param session The session on which communication is happening
* \param tdata The message to add the header to
* \param id The identification information used to populate the header
*/
static void add_pai_header(const struct ast_sip_session *session, pjsip_tx_data *tdata, const struct ast_party_id *id)
{
static const pj_str_t pj_pai_name = { "P-Asserted-Identity", 19 };
pjsip_fromto_hdr *base;
pjsip_fromto_hdr *pai_hdr;
pjsip_fromto_hdr *old_pai;
/* Since inv_session reuses responses, we have to make sure there's not already
* a P-Asserted-Identity present. If there is, we just modify the old one.
*/
old_pai = pjsip_msg_find_hdr_by_name(tdata->msg, &pj_pai_name, NULL);
if (old_pai) {
/* If type is OTHER, then the existing header was most likely
* added by the PJSIP_HEADER dial plan function as a simple
* name/value pair. We can't pass this to modify_id_header because
* there are no virtual functions to get the uri. We could parse
* it into a pjsip_fromto_hdr but it isn't worth it since
* modify_id_header is just going to overwrite the name and number
* anyway. We'll just remove it from the header list instead
* and create a new one.
*/
if (old_pai->type == PJSIP_H_OTHER) {
pj_list_erase(old_pai);
} else {
ast_sip_modify_id_header(tdata->pool, old_pai, id);
add_privacy_header(tdata, id);
return;
}
}
if (tdata->msg->type == PJSIP_REQUEST_MSG) {
base = session->saved_from_hdr ? session->saved_from_hdr : PJSIP_MSG_FROM_HDR(tdata->msg);
} else {
base = PJSIP_MSG_TO_HDR(tdata->msg);
}
pai_hdr = create_new_id_hdr(&pj_pai_name, base, tdata, id);
if (!pai_hdr) {
return;
}
add_privacy_header(tdata, id);
pjsip_msg_add_hdr(tdata->msg, (pjsip_hdr *)pai_hdr);
}
/*!
* \internal
* \brief Add party parameter to a Remote-Party-ID header.
*
* \param tdata The message where the Remote-Party-ID header is
* \param hdr The header on which the parameters are being added
* \param session The session involved
*/
static void add_party_param(pjsip_tx_data *tdata, pjsip_fromto_hdr *hdr, const struct ast_sip_session *session)
{
static const pj_str_t party_str = { "party", 5 };
static const pj_str_t calling_str = { "calling", 7 };
static const pj_str_t called_str = { "called", 6 };
pjsip_param *party;
/* The party value can't change throughout the lifetime, so it is set only once */
party = pjsip_param_find(&hdr->other_param, &party_str);
if (party) {
return;
}
party = PJ_POOL_ALLOC_T(tdata->pool, pjsip_param);
party->name = party_str;
party->value = (session->inv_session->role == PJSIP_ROLE_UAC) ? calling_str : called_str;
pj_list_insert_before(&hdr->other_param, party);
}
/*!
* \internal
* \brief Add privacy and screen parameters to a Remote-Party-ID header.
*
* If privacy is requested, then the privacy and screen parameters need to
* reflect this. Similarly, if no privacy or screening is to be communicated,
* we need to make sure that any previously set values are updated.
*
* \param tdata The message where the Remote-Party-ID header is
* \param hdr The header on which the parameters are being added
* \param id The identification information used to determine privacy
*/
static void add_privacy_params(pjsip_tx_data *tdata, pjsip_fromto_hdr *hdr, const struct ast_party_id *id)
{
static const pj_str_t privacy_str = { "privacy", 7 };
static const pj_str_t screen_str = { "screen", 6 };
static const pj_str_t privacy_full_str = { "full", 4 };
static const pj_str_t privacy_off_str = { "off", 3 };
static const pj_str_t screen_yes_str = { "yes", 3 };
static const pj_str_t screen_no_str = { "no", 2 };
pjsip_param *old_privacy;
pjsip_param *old_screen;
pjsip_param *privacy;
pjsip_param *screen;
int presentation;
old_privacy = pjsip_param_find(&hdr->other_param, &privacy_str);
old_screen = pjsip_param_find(&hdr->other_param, &screen_str);
if (!old_privacy) {
privacy = PJ_POOL_ALLOC_T(tdata->pool, pjsip_param);
privacy->name = privacy_str;
pj_list_insert_before(&hdr->other_param, privacy);
} else {
privacy = old_privacy;
}
if (!old_screen) {
screen = PJ_POOL_ALLOC_T(tdata->pool, pjsip_param);
screen->name = screen_str;
pj_list_insert_before(&hdr->other_param, screen);
} else {
screen = old_screen;
}
presentation = ast_party_id_presentation(id);
if ((presentation & AST_PRES_RESTRICTION) == AST_PRES_ALLOWED) {
privacy->value = privacy_off_str;
} else {
privacy->value = privacy_full_str;
}
if ((presentation & AST_PRES_NUMBER_TYPE) == AST_PRES_USER_NUMBER_PASSED_SCREEN) {
screen->value = screen_yes_str;
} else {
screen->value = screen_no_str;
}
}
/*!
* \internal
* \brief Add a Remote-Party-ID header to an outbound message
* \param session The session on which communication is happening
* \param tdata The message to add the header to
* \param id The identification information used to populate the header
*/
static void add_rpid_header(const struct ast_sip_session *session, pjsip_tx_data *tdata, const struct ast_party_id *id)
{
static const pj_str_t pj_rpid_name = { "Remote-Party-ID", 15 };
pjsip_fromto_hdr *base;
pjsip_fromto_hdr *rpid_hdr;
pjsip_fromto_hdr *old_rpid;
/* Since inv_session reuses responses, we have to make sure there's not already
* a P-Asserted-Identity present. If there is, we just modify the old one.
*/
old_rpid = pjsip_msg_find_hdr_by_name(tdata->msg, &pj_rpid_name, NULL);
if (old_rpid) {
/* If type is OTHER, then the existing header was most likely
* added by the PJSIP_HEADER dial plan function as a simple
* name/value pair. We can't pass this to modify_id_header because
* there are no virtual functions to get the uri. We could parse
* it into a pjsip_fromto_hdr but it isn't worth it since
* modify_id_header is just going to overwrite the name and number
* anyway. We'll just remove it from the header list instead
* and create a new one.
*/
if (old_rpid->type == PJSIP_H_OTHER) {
pj_list_erase(old_rpid);
} else {
ast_sip_modify_id_header(tdata->pool, old_rpid, id);
add_party_param(tdata, old_rpid, session);
add_privacy_params(tdata, old_rpid, id);
return;
}
}
if (tdata->msg->type == PJSIP_REQUEST_MSG) {
base = session->saved_from_hdr ? session->saved_from_hdr : PJSIP_MSG_FROM_HDR(tdata->msg);
} else {
base = PJSIP_MSG_TO_HDR(tdata->msg);
}
rpid_hdr = create_new_id_hdr(&pj_rpid_name, base, tdata, id);
if (!rpid_hdr) {
return;
}
add_party_param(tdata, rpid_hdr, session);
add_privacy_params(tdata, rpid_hdr, id);
pjsip_msg_add_hdr(tdata->msg, (pjsip_hdr *)rpid_hdr);
}
/*!
* \internal
* \brief Add any appropriate identification headers to an outbound SIP message
*
* This will determine if an outbound message should have identification headers and
* will add the appropriately configured headers
*
* \param session The session on which we will be sending the message
* \param tdata The outbound message
* \param id The identity information to place on the message
*/
static void add_id_headers(const struct ast_sip_session *session, pjsip_tx_data *tdata, const struct ast_party_id *id)
{
if (!id->number.valid
|| (!session->endpoint->id.trust_outbound
&& (ast_party_id_presentation(id) & AST_PRES_RESTRICTION) != AST_PRES_ALLOWED)) {
return;
}
if (session->endpoint->id.send_pai) {
add_pai_header(session, tdata, id);
}
if (session->endpoint->id.send_rpid) {
add_rpid_header(session, tdata, id);
}
}
/*!
* \internal
* \brief Session supplement callback for outgoing INVITE requests
*
* On all INVITEs (initial and reinvite) we may add other identity headers
* such as P-Asserted-Identity and Remote-Party-ID based on configuration
* and privacy settings
*
* \param session The session on which the INVITE will be sent
* \param tdata The outbound INVITE request
*/
static void caller_id_outgoing_request(struct ast_sip_session *session, pjsip_tx_data *tdata)
{
struct ast_party_id effective_id;
struct ast_party_id connected_id;
if (!session->channel) {
return;
}
ast_party_id_init(&connected_id);
ast_channel_lock(session->channel);
effective_id = ast_channel_connected_effective_id(session->channel);
ast_party_id_copy(&connected_id, &effective_id);
ast_channel_unlock(session->channel);
add_id_headers(session, tdata, &connected_id);
ast_party_id_free(&connected_id);
}
/*!
* \internal
* \brief Session supplement for outgoing INVITE response
*
* This will add P-Asserted-Identity and Remote-Party-ID headers if necessary
*
* \param session The session on which the INVITE response is to be sent
* \param tdata The outbound INVITE response
*/
static void caller_id_outgoing_response(struct ast_sip_session *session, pjsip_tx_data *tdata)
{
struct ast_party_id effective_id;
struct ast_party_id connected_id;
if (!session->channel
|| (!session->endpoint->id.send_connected_line
&& session->inv_session
&& session->inv_session->state >= PJSIP_INV_STATE_EARLY)) {
return;
}
/* Must do a deep copy unless we hold the channel lock the entire time. */
ast_party_id_init(&connected_id);
ast_channel_lock(session->channel);
effective_id = ast_channel_connected_effective_id(session->channel);
ast_party_id_copy(&connected_id, &effective_id);
ast_channel_unlock(session->channel);
add_id_headers(session, tdata, &connected_id);
ast_party_id_free(&connected_id);
}
static struct ast_sip_session_supplement caller_id_supplement = {
.method = "INVITE,UPDATE",
.priority = AST_SIP_SUPPLEMENT_PRIORITY_CHANNEL - 1000,
.incoming_request = caller_id_incoming_request,
.incoming_response = caller_id_incoming_response,
.outgoing_request = caller_id_outgoing_request,
.outgoing_response = caller_id_outgoing_response,
};
static int load_module(void)
{
ast_module_shutdown_ref(AST_MODULE_SELF);
ast_sip_session_register_supplement(&caller_id_supplement);
return AST_MODULE_LOAD_SUCCESS;
}
static int unload_module(void)
{
ast_sip_session_unregister_supplement(&caller_id_supplement);
return 0;
}
AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "PJSIP Caller ID Support",
.support_level = AST_MODULE_SUPPORT_CORE,
.load = load_module,
.unload = unload_module,
.load_pri = AST_MODPRI_APP_DEPEND,
.requires = "res_pjsip,res_pjsip_session",
);