static pj_status_t send_options_response(pjsip_rx_data *rdata, int code)
{
pjsip_endpoint *endpt = ast_sip_get_pjsip_endpoint();
pjsip_dialog *dlg = pjsip_rdata_get_dlg(rdata);
pjsip_transaction *trans = pjsip_rdata_get_tsx(rdata);
pjsip_tx_data *tdata;
const pjsip_hdr *hdr;
pj_status_t status;
/* Make the response object */
status = ast_sip_create_response(rdata, code, NULL, &tdata);
if (status != PJ_SUCCESS) {
ast_log(LOG_ERROR, "Unable to create response (%d)\n", status);
return status;
}
/* Add appropriate headers */
if ((hdr = pjsip_endpt_get_capability(endpt, PJSIP_H_ACCEPT, NULL))) {
pjsip_msg_add_hdr(tdata->msg, (pjsip_hdr*)pjsip_hdr_clone(tdata->pool, hdr));
}
if ((hdr = pjsip_endpt_get_capability(endpt, PJSIP_H_ALLOW, NULL))) {
pjsip_msg_add_hdr(tdata->msg, (pjsip_hdr*)pjsip_hdr_clone(tdata->pool, hdr));
}
if ((hdr = pjsip_endpt_get_capability(endpt, PJSIP_H_SUPPORTED, NULL))) {
pjsip_msg_add_hdr(tdata->msg, (pjsip_hdr*)pjsip_hdr_clone(tdata->pool, hdr));
}
/*
* XXX TODO: pjsip doesn't care a lot about either of these headers -
* while it provides specific methods to create them, they are defined
* to be the standard string header creation. We never did add them
* in chan_sip, although RFC 3261 says they SHOULD. Hard coded here.
*/
ast_sip_add_header(tdata, "Accept-Encoding", DEFAULT_ENCODING);
ast_sip_add_header(tdata, "Accept-Language", DEFAULT_LANGUAGE);
if (dlg && trans) {
status = pjsip_dlg_send_response(dlg, trans, tdata);
} else {
struct ast_sip_endpoint *endpoint;
endpoint = ast_pjsip_rdata_get_endpoint(rdata);
status = ast_sip_send_stateful_response(rdata, tdata, endpoint);
ao2_cleanup(endpoint);
}
if (status != PJ_SUCCESS) {
ast_log(LOG_ERROR, "Unable to send response (%d)\n", status);
}
return status;
}
static int msg_send(void *data)
{
RAII_VAR(struct msg_data *, mdata, data, ao2_cleanup);
const struct ast_sip_body body = {
.type = "text",
.subtype = "plain",
.body_text = ast_msg_get_body(mdata->msg)
};
pjsip_tx_data *tdata;
RAII_VAR(char *, uri, NULL, ast_free);
RAII_VAR(struct ast_sip_endpoint *, endpoint, get_outbound_endpoint(
mdata->to, &uri), ao2_cleanup);
if (!endpoint) {
ast_log(LOG_ERROR, "PJSIP MESSAGE - Could not find endpoint '%s' and "
"no default outbound endpoint configured\n", mdata->to);
return -1;
}
if (ast_sip_create_request("MESSAGE", NULL, endpoint, uri, NULL, &tdata)) {
ast_log(LOG_ERROR, "PJSIP MESSAGE - Could not create request\n");
return -1;
}
update_to(tdata, mdata->to);
update_from(tdata, mdata->from);
if (ast_sip_add_body(tdata, &body)) {
pjsip_tx_data_dec_ref(tdata);
ast_log(LOG_ERROR, "PJSIP MESSAGE - Could not add body to request\n");
return -1;
}
vars_to_headers(mdata->msg, tdata);
ast_debug(1, "Sending message to '%s' (via endpoint %s) from '%s'\n",
mdata->to, ast_sorcery_object_get_id(endpoint), mdata->from);
if (ast_sip_send_request(tdata, NULL, endpoint, NULL, NULL)) {
ast_log(LOG_ERROR, "PJSIP MESSAGE - Could not send request\n");
return -1;
}
return PJ_SUCCESS;
}
static int sip_msg_send(const struct ast_msg *msg, const char *to, const char *from)
{
struct msg_data *mdata;
if (ast_strlen_zero(to)) {
ast_log(LOG_ERROR, "SIP MESSAGE - a 'To' URI must be specified\n");
return -1;
}
if (!(mdata = msg_data_create(msg, to, from)) ||
ast_sip_push_task(message_serializer, msg_send, mdata)) {
ao2_ref(mdata, -1);
return -1;
}
return 0;
}
static const struct ast_msg_tech msg_tech = {
.name = "pjsip",
.msg_send = sip_msg_send,
};
static pj_status_t send_response(pjsip_rx_data *rdata, enum pjsip_status_code code,
pjsip_dialog *dlg, pjsip_transaction *tsx)
{
pjsip_tx_data *tdata;
pj_status_t status;
status = ast_sip_create_response(rdata, code, NULL, &tdata);
if (status != PJ_SUCCESS) {
ast_log(LOG_ERROR, "Unable to create response (%d)\n", status);
return status;
}
if (dlg && tsx) {
status = pjsip_dlg_send_response(dlg, tsx, tdata);
} else {
struct ast_sip_endpoint *endpoint;
endpoint = ast_pjsip_rdata_get_endpoint(rdata);
status = ast_sip_send_stateful_response(rdata, tdata, endpoint);
ao2_cleanup(endpoint);
}
if (status != PJ_SUCCESS) {
ast_log(LOG_ERROR, "Unable to send response (%d)\n", status);
}
return status;
}
static pj_bool_t module_on_rx_request(pjsip_rx_data *rdata)
{
enum pjsip_status_code code;
struct ast_msg *msg;
/* if not a MESSAGE, don't handle */
if (pjsip_method_cmp(&rdata->msg_info.msg->line.req.method, &pjsip_message_method)) {
return PJ_FALSE;
}
code = check_content_type(rdata);
if (code != PJSIP_SC_OK) {
send_response(rdata, code, NULL, NULL);
return PJ_TRUE;
}
msg = ast_msg_alloc();
if (!msg) {
send_response(rdata, PJSIP_SC_INTERNAL_SERVER_ERROR, NULL, NULL);
return PJ_TRUE;
}
code = rx_data_to_ast_msg(rdata, msg);
if (code != PJSIP_SC_OK) {
send_response(rdata, code, NULL, NULL);
ast_msg_destroy(msg);
return PJ_TRUE;
}
if (!ast_msg_has_destination(msg)) {
ast_debug(1, "MESSAGE request received, but no handler wanted it\n");
send_response(rdata, PJSIP_SC_NOT_FOUND, NULL, NULL);
ast_msg_destroy(msg);
return PJ_TRUE;
}
/* Send it to the messaging core.
*
* If we are unable to send a response, the most likely reason is that we
* are handling a retransmission of an incoming MESSAGE and were unable to
* create a transaction due to a duplicate key. If we are unable to send
* a response, we should not queue the message to the dialplan
*/
if (!send_response(rdata, PJSIP_SC_ACCEPTED, NULL, NULL)) {
ast_msg_queue(msg);
}
return PJ_TRUE;
}
static int incoming_in_dialog_request(struct ast_sip_session *session, struct pjsip_rx_data *rdata)
{
char buf[MAX_BODY_SIZE];
enum pjsip_status_code code;
struct ast_frame f;
pjsip_dialog *dlg = session->inv_session->dlg;
pjsip_transaction *tsx = pjsip_rdata_get_tsx(rdata);
if (!session->channel) {
send_response(rdata, PJSIP_SC_NOT_FOUND, dlg, tsx);
return 0;
}
if ((code = check_content_type(rdata)) != PJSIP_SC_OK) {
send_response(rdata, code, dlg, tsx);
return 0;
}
if (print_body(rdata, buf, sizeof(buf)-1) < 1) {
/* invalid body size */
send_response(rdata, PJSIP_SC_REQUEST_ENTITY_TOO_LARGE, dlg, tsx);
return 0;
}
ast_debug(3, "Received in dialog SIP message\n");
memset(&f, 0, sizeof(f));
f.frametype = AST_FRAME_TEXT;
f.subclass.integer = 0;
f.offset = 0;
f.data.ptr = buf;
f.datalen = strlen(buf) + 1;
ast_queue_frame(session->channel, &f);
send_response(rdata, PJSIP_SC_ACCEPTED, dlg, tsx);
return 0;
}
static int register_aor_core(pjsip_rx_data *rdata,
struct ast_sip_endpoint *endpoint,
struct ast_sip_aor *aor,
const char *aor_name,
struct ao2_container *contacts)
{
static const pj_str_t USER_AGENT = { "User-Agent", 10 };
int added = 0, updated = 0, deleted = 0;
pjsip_contact_hdr *contact_hdr = NULL;
struct registrar_contact_details details = { 0, };
pjsip_tx_data *tdata;
RAII_VAR(struct ast_str *, path_str, NULL, ast_free);
struct ast_sip_contact *response_contact;
char *user_agent = NULL;
pjsip_user_agent_hdr *user_agent_hdr;
pjsip_expires_hdr *expires_hdr;
pjsip_via_hdr *via_hdr;
pjsip_via_hdr *via_hdr_last;
char *via_addr = NULL;
int via_port = 0;
pjsip_cid_hdr *call_id_hdr;
char *call_id = NULL;
size_t alloc_size;
/* So we don't count static contacts against max_contacts we prune them out from the container */
ao2_callback(contacts, OBJ_NODATA | OBJ_UNLINK | OBJ_MULTIPLE, registrar_prune_static, NULL);
if (registrar_validate_contacts(rdata, contacts, aor, &added, &updated, &deleted)) {
/* The provided Contact headers do not conform to the specification */
pjsip_endpt_respond_stateless(ast_sip_get_pjsip_endpoint(), rdata, 400, NULL, NULL, NULL);
ast_sip_report_failed_acl(endpoint, rdata, "registrar_invalid_contacts_provided");
ast_log(LOG_WARNING, "Failed to validate contacts in REGISTER request from '%s'\n",
ast_sorcery_object_get_id(endpoint));
return PJ_TRUE;
}
if (registrar_validate_path(rdata, aor, &path_str)) {
/* Ensure that intervening proxies did not make invalid modifications to the request */
pjsip_endpt_respond_stateless(ast_sip_get_pjsip_endpoint(), rdata, 420, NULL, NULL, NULL);
ast_log(LOG_WARNING, "Invalid modifications made to REGISTER request from '%s' by intervening proxy\n",
ast_sorcery_object_get_id(endpoint));
return PJ_TRUE;
}
if ((MAX(added - deleted, 0) + (!aor->remove_existing ? ao2_container_count(contacts) : 0)) > aor->max_contacts) {
/* Enforce the maximum number of contacts */
pjsip_endpt_respond_stateless(ast_sip_get_pjsip_endpoint(), rdata, 403, NULL, NULL, NULL);
ast_sip_report_failed_acl(endpoint, rdata, "registrar_attempt_exceeds_maximum_configured_contacts");
ast_log(LOG_WARNING, "Registration attempt from endpoint '%s' to AOR '%s' will exceed max contacts of %u\n",
ast_sorcery_object_get_id(endpoint), aor_name, aor->max_contacts);
return PJ_TRUE;
}
if (!(details.pool = pjsip_endpt_create_pool(ast_sip_get_pjsip_endpoint(), "Contact Comparison", 256, 256))) {
pjsip_endpt_respond_stateless(ast_sip_get_pjsip_endpoint(), rdata, 500, NULL, NULL, NULL);
return PJ_TRUE;
}
user_agent_hdr = pjsip_msg_find_hdr_by_name(rdata->msg_info.msg, &USER_AGENT, NULL);
if (user_agent_hdr) {
alloc_size = pj_strlen(&user_agent_hdr->hvalue) + 1;
user_agent = ast_alloca(alloc_size);
ast_copy_pj_str(user_agent, &user_agent_hdr->hvalue, alloc_size);
}
/* Find the first Via header */
via_hdr = via_hdr_last = (pjsip_via_hdr*) pjsip_msg_find_hdr(rdata->msg_info.msg, PJSIP_H_VIA, NULL);
if (via_hdr) {
/* Find the last Via header */
while ( (via_hdr = (pjsip_via_hdr*) pjsip_msg_find_hdr(rdata->msg_info.msg,
PJSIP_H_VIA, via_hdr->next)) != NULL) {
via_hdr_last = via_hdr;
}
alloc_size = pj_strlen(&via_hdr_last->sent_by.host) + 1;
via_addr = ast_alloca(alloc_size);
ast_copy_pj_str(via_addr, &via_hdr_last->sent_by.host, alloc_size);
via_port=via_hdr_last->sent_by.port;
}
call_id_hdr = (pjsip_cid_hdr*) pjsip_msg_find_hdr(rdata->msg_info.msg, PJSIP_H_CALL_ID, NULL);
if (call_id_hdr) {
alloc_size = pj_strlen(&call_id_hdr->id) + 1;
call_id = ast_alloca(alloc_size);
ast_copy_pj_str(call_id, &call_id_hdr->id, alloc_size);
}
/* Iterate each provided Contact header and add, update, or delete */
while ((contact_hdr = pjsip_msg_find_hdr(rdata->msg_info.msg, PJSIP_H_CONTACT, contact_hdr ? contact_hdr->next : NULL))) {
int expiration;
char contact_uri[pjsip_max_url_size];
RAII_VAR(struct ast_sip_contact *, contact, NULL, ao2_cleanup);
if (contact_hdr->star) {
/* A star means to unregister everything, so do so for the possible contacts */
ao2_callback(contacts, OBJ_NODATA | OBJ_MULTIPLE, registrar_delete_contact, (void *)aor_name);
break;
}
if (!PJSIP_URI_SCHEME_IS_SIP(contact_hdr->uri) && !PJSIP_URI_SCHEME_IS_SIPS(contact_hdr->uri)) {
/* This registrar only currently supports sip: and sips: URI schemes */
continue;
}
expiration = registrar_get_expiration(aor, contact_hdr, rdata);
details.uri = pjsip_uri_get_uri(contact_hdr->uri);
pjsip_uri_print(PJSIP_URI_IN_CONTACT_HDR, details.uri, contact_uri, sizeof(contact_uri));
if (!(contact = ao2_callback(contacts, OBJ_UNLINK, registrar_find_contact, &details))) {
/* If they are actually trying to delete a contact that does not exist... be forgiving */
if (!expiration) {
ast_verb(3, "Attempted to remove non-existent contact '%s' from AOR '%s' by request\n",
contact_uri, aor_name);
continue;
}
if (ast_sip_location_add_contact_nolock(aor, contact_uri, ast_tvadd(ast_tvnow(),
ast_samp2tv(expiration, 1)), path_str ? ast_str_buffer(path_str) : NULL,
user_agent, via_addr, via_port, call_id, endpoint)) {
ast_log(LOG_ERROR, "Unable to bind contact '%s' to AOR '%s'\n",
contact_uri, aor_name);
continue;
}
ast_verb(3, "Added contact '%s' to AOR '%s' with expiration of %d seconds\n",
contact_uri, aor_name, expiration);
ast_test_suite_event_notify("AOR_CONTACT_ADDED",
"Contact: %s\r\n"
"AOR: %s\r\n"
"Expiration: %d\r\n"
"UserAgent: %s",
contact_uri,
aor_name,
expiration,
user_agent);
} else if (expiration) {
struct ast_sip_contact *contact_update;
contact_update = ast_sorcery_copy(ast_sip_get_sorcery(), contact);
if (!contact_update) {
ast_log(LOG_ERROR, "Failed to update contact '%s' expiration time to %d seconds.\n",
contact->uri, expiration);
continue;
}
contact_update->expiration_time = ast_tvadd(ast_tvnow(), ast_samp2tv(expiration, 1));
contact_update->qualify_frequency = aor->qualify_frequency;
contact_update->authenticate_qualify = aor->authenticate_qualify;
if (path_str) {
ast_string_field_set(contact_update, path, ast_str_buffer(path_str));
}
if (user_agent) {
ast_string_field_set(contact_update, user_agent, user_agent);
}
if (!ast_strlen_zero(ast_config_AST_SYSTEM_NAME)) {
ast_string_field_set(contact_update, reg_server, ast_config_AST_SYSTEM_NAME);
}
if (ast_sip_location_update_contact(contact_update)) {
ast_log(LOG_ERROR, "Failed to update contact '%s' expiration time to %d seconds.\n",
contact->uri, expiration);
ast_sip_location_delete_contact(contact);
continue;
}
ast_debug(3, "Refreshed contact '%s' on AOR '%s' with new expiration of %d seconds\n",
contact_uri, aor_name, expiration);
ast_test_suite_event_notify("AOR_CONTACT_REFRESHED",
"Contact: %s\r\n"
"AOR: %s\r\n"
"Expiration: %d\r\n"
"UserAgent: %s",
contact_uri,
aor_name,
expiration,
contact_update->user_agent);
ao2_cleanup(contact_update);
} else {
/* We want to report the user agent that was actually in the removed contact */
ast_sip_location_delete_contact(contact);
ast_verb(3, "Removed contact '%s' from AOR '%s' due to request\n", contact_uri, aor_name);
ast_test_suite_event_notify("AOR_CONTACT_REMOVED",
"Contact: %s\r\n"
"AOR: %s\r\n"
"UserAgent: %s",
contact_uri,
aor_name,
contact->user_agent);
}
}
pjsip_endpt_release_pool(ast_sip_get_pjsip_endpoint(), details.pool);
/* If the AOR is configured to remove any existing contacts that have not been updated/added as a result of this REGISTER
* do so
*/
if (aor->remove_existing) {
ao2_callback(contacts, OBJ_NODATA | OBJ_MULTIPLE, registrar_delete_contact, NULL);
}
/* Re-retrieve contacts. Caller will clean up the original container. */
contacts = ast_sip_location_retrieve_aor_contacts_nolock(aor);
response_contact = ao2_callback(contacts, 0, NULL, NULL);
/* Send a response containing all of the contacts (including static) that are present on this AOR */
if (ast_sip_create_response(rdata, 200, response_contact, &tdata) != PJ_SUCCESS) {
ao2_cleanup(response_contact);
ao2_cleanup(contacts);
return PJ_TRUE;
}
ao2_cleanup(response_contact);
/* Add the date header to the response, some UAs use this to set their date and time */
registrar_add_date_header(tdata);
ao2_callback(contacts, 0, registrar_add_contact, tdata);
ao2_cleanup(contacts);
if ((expires_hdr = pjsip_msg_find_hdr(rdata->msg_info.msg, PJSIP_H_EXPIRES, NULL))) {
expires_hdr = pjsip_expires_hdr_create(tdata->pool, registrar_get_expiration(aor, NULL, rdata));
pjsip_msg_add_hdr(tdata->msg, (pjsip_hdr*)expires_hdr);
}
ast_sip_send_stateful_response(rdata, tdata, endpoint);
return PJ_TRUE;
}
static int msg_send(void *data)
{
RAII_VAR(struct msg_data *, mdata, data, ao2_cleanup);
const struct ast_sip_body body = {
.type = "text",
.subtype = "plain",
.body_text = ast_msg_get_body(mdata->msg)
};
pjsip_tx_data *tdata;
RAII_VAR(char *, uri, NULL, ast_free);
RAII_VAR(struct ast_sip_endpoint *, endpoint, get_outbound_endpoint(
mdata->to, &uri), ao2_cleanup);
if (!endpoint) {
ast_log(LOG_ERROR, "PJSIP MESSAGE - Could not find endpoint and "
"no default outbound endpoint configured\n");
return -1;
}
if (ast_sip_create_request("MESSAGE", NULL, endpoint, uri, NULL, &tdata)) {
ast_log(LOG_ERROR, "PJSIP MESSAGE - Could not create request\n");
return -1;
}
update_to(tdata, mdata->to);
update_from(tdata, mdata->from);
if (ast_sip_add_body(tdata, &body)) {
pjsip_tx_data_dec_ref(tdata);
ast_log(LOG_ERROR, "PJSIP MESSAGE - Could not add body to request\n");
return -1;
}
vars_to_headers(mdata->msg, tdata);
if (ast_sip_send_request(tdata, NULL, endpoint, NULL, NULL)) {
ast_log(LOG_ERROR, "PJSIP MESSAGE - Could not send request\n");
return -1;
}
return PJ_SUCCESS;
}
static int sip_msg_send(const struct ast_msg *msg, const char *to, const char *from)
{
struct msg_data *mdata;
if (ast_strlen_zero(to)) {
ast_log(LOG_ERROR, "SIP MESSAGE - a 'To' URI must be specified\n");
return -1;
}
if (!(mdata = msg_data_create(msg, to, from)) ||
ast_sip_push_task(NULL, msg_send, mdata)) {
ao2_ref(mdata, -1);
return -1;
}
return 0;
}
static const struct ast_msg_tech msg_tech = {
.name = "pjsip",
.msg_send = sip_msg_send,
};
static pj_status_t send_response(pjsip_rx_data *rdata, enum pjsip_status_code code,
pjsip_dialog *dlg, pjsip_transaction *tsx)
{
pjsip_tx_data *tdata;
pj_status_t status;
pjsip_response_addr res_addr;
status = ast_sip_create_response(rdata, code, NULL, &tdata);
if (status != PJ_SUCCESS) {
ast_log(LOG_ERROR, "Unable to create response (%d)\n", status);
return status;
}
if (dlg && tsx) {
status = pjsip_dlg_send_response(dlg, tsx, tdata);
} else {
/* Get where to send request. */
status = pjsip_get_response_addr(tdata->pool, rdata, &res_addr);
if (status != PJ_SUCCESS) {
ast_log(LOG_ERROR, "Unable to get response address (%d)\n", status);
return status;
}
status = ast_sip_send_response(&res_addr, tdata, ast_pjsip_rdata_get_endpoint(rdata));
}
if (status != PJ_SUCCESS) {
ast_log(LOG_ERROR, "Unable to send response (%d)\n", status);
}
return status;
}
static pj_bool_t module_on_rx_request(pjsip_rx_data *rdata)
{
enum pjsip_status_code code;
struct ast_msg *msg;
/* if not a MESSAGE, don't handle */
if (pjsip_method_cmp(&rdata->msg_info.msg->line.req.method, &pjsip_message_method)) {
return PJ_FALSE;
}
msg = ast_msg_alloc();
if (!msg) {
send_response(rdata, PJSIP_SC_INTERNAL_SERVER_ERROR, NULL, NULL);
return PJ_TRUE;
}
if ((code = check_content_type(rdata)) != PJSIP_SC_OK) {
send_response(rdata, code, NULL, NULL);
return PJ_TRUE;
}
if ((code = rx_data_to_ast_msg(rdata, msg)) == PJSIP_SC_OK) {
/* send it to the dialplan */
ast_msg_queue(msg);
code = PJSIP_SC_ACCEPTED;
}
send_response(rdata, code, NULL, NULL);
return PJ_TRUE;
}
static int incoming_in_dialog_request(struct ast_sip_session *session, struct pjsip_rx_data *rdata)
{
char buf[MAX_BODY_SIZE];
enum pjsip_status_code code;
struct ast_frame f;
pjsip_dialog *dlg = session->inv_session->dlg;
pjsip_transaction *tsx = pjsip_rdata_get_tsx(rdata);
if ((code = check_content_type(rdata)) != PJSIP_SC_OK) {
send_response(rdata, code, dlg, tsx);
return 0;
}
if (print_body(rdata, buf, sizeof(buf)-1) < 1) {
/* invalid body size */
return 0;
}
ast_debug(3, "Received in dialog SIP message\n");
memset(&f, 0, sizeof(f));
f.frametype = AST_FRAME_TEXT;
f.subclass.integer = 0;
f.offset = 0;
f.data.ptr = buf;
f.datalen = strlen(buf) + 1;
ast_queue_frame(session->channel, &f);
send_response(rdata, PJSIP_SC_ACCEPTED, dlg, tsx);
return 0;
}
static void register_aor_core(pjsip_rx_data *rdata,
struct ast_sip_endpoint *endpoint,
struct ast_sip_aor *aor,
const char *aor_name,
struct ao2_container *contacts,
struct aor_core_response *response)
{
static const pj_str_t USER_AGENT = { "User-Agent", 10 };
int added = 0;
int updated = 0;
int deleted = 0;
int permanent = 0;
int contact_count;
struct ao2_container *existing_contacts = NULL;
pjsip_contact_hdr *contact_hdr = (pjsip_contact_hdr *)&rdata->msg_info.msg->hdr;
struct registrar_contact_details details = { 0, };
pjsip_tx_data *tdata;
RAII_VAR(struct ast_str *, path_str, NULL, ast_free);
struct ast_sip_contact *response_contact;
char *user_agent = NULL;
pjsip_user_agent_hdr *user_agent_hdr;
pjsip_expires_hdr *expires_hdr;
pjsip_via_hdr *via_hdr;
pjsip_via_hdr *via_hdr_last;
char *via_addr = NULL;
int via_port = 0;
pjsip_cid_hdr *call_id_hdr;
char *call_id = NULL;
size_t alloc_size;
/* We create a single pool and use it throughout this function where we need one */
details.pool = pjsip_endpt_create_pool(ast_sip_get_pjsip_endpoint(),
"Contact Comparison", 1024, 256);
if (!details.pool) {
response->code = 500;
return;
}
/* If there are any permanent contacts configured on the AOR we need to take them
* into account when counting contacts.
*/
if (aor->permanent_contacts) {
permanent = ao2_container_count(aor->permanent_contacts);
}
if (registrar_validate_contacts(rdata, details.pool, contacts, aor, permanent, &added, &updated, &deleted)) {
/* The provided Contact headers do not conform to the specification */
ast_sip_report_failed_acl(endpoint, rdata, "registrar_invalid_contacts_provided");
ast_log(LOG_WARNING, "Failed to validate contacts in REGISTER request from '%s'\n",
ast_sorcery_object_get_id(endpoint));
response->code = 400;
pjsip_endpt_release_pool(ast_sip_get_pjsip_endpoint(), details.pool);
return;
}
if (registrar_validate_path(rdata, aor, &path_str)) {
/* Ensure that intervening proxies did not make invalid modifications to the request */
ast_log(LOG_WARNING, "Invalid modifications made to REGISTER request from '%s' by intervening proxy\n",
ast_sorcery_object_get_id(endpoint));
response->code = 420;
pjsip_endpt_release_pool(ast_sip_get_pjsip_endpoint(), details.pool);
return;
}
if (aor->remove_existing) {
/* Cumulative number of contacts affected by this registration */
contact_count = MAX(updated + added - deleted, 0);
/* We need to keep track of only existing contacts so we can later
* remove them if need be.
*/
existing_contacts = ao2_container_alloc_list(AO2_ALLOC_OPT_LOCK_NOLOCK, 0,
NULL, ast_sorcery_object_id_compare);
if (!existing_contacts) {
response->code = 500;
pjsip_endpt_release_pool(ast_sip_get_pjsip_endpoint(), details.pool);
return;
}
ao2_callback(contacts, OBJ_NODATA, registrar_add_non_permanent, existing_contacts);
} else {
/* Total contacts after this registration */
contact_count = ao2_container_count(contacts) - permanent + added - deleted;
}
if (contact_count > aor->max_contacts) {
/* Enforce the maximum number of contacts */
ast_sip_report_failed_acl(endpoint, rdata, "registrar_attempt_exceeds_maximum_configured_contacts");
ast_log(LOG_WARNING, "Registration attempt from endpoint '%s' to AOR '%s' will exceed max contacts of %u\n",
ast_sorcery_object_get_id(endpoint), aor_name, aor->max_contacts);
response->code = 403;
pjsip_endpt_release_pool(ast_sip_get_pjsip_endpoint(), details.pool);
ao2_cleanup(existing_contacts);
return;
}
user_agent_hdr = pjsip_msg_find_hdr_by_name(rdata->msg_info.msg, &USER_AGENT, NULL);
if (user_agent_hdr) {
alloc_size = pj_strlen(&user_agent_hdr->hvalue) + 1;
user_agent = ast_alloca(alloc_size);
ast_copy_pj_str(user_agent, &user_agent_hdr->hvalue, alloc_size);
}
/* Find the first Via header */
via_hdr = via_hdr_last = (pjsip_via_hdr*) pjsip_msg_find_hdr(rdata->msg_info.msg, PJSIP_H_VIA, NULL);
if (via_hdr) {
/* Find the last Via header */
while ( (via_hdr = (pjsip_via_hdr*) pjsip_msg_find_hdr(rdata->msg_info.msg,
PJSIP_H_VIA, via_hdr->next)) != NULL) {
via_hdr_last = via_hdr;
}
alloc_size = pj_strlen(&via_hdr_last->sent_by.host) + 1;
via_addr = ast_alloca(alloc_size);
ast_copy_pj_str(via_addr, &via_hdr_last->sent_by.host, alloc_size);
via_port=via_hdr_last->sent_by.port;
}
call_id_hdr = (pjsip_cid_hdr*) pjsip_msg_find_hdr(rdata->msg_info.msg, PJSIP_H_CALL_ID, NULL);
if (call_id_hdr) {
alloc_size = pj_strlen(&call_id_hdr->id) + 1;
call_id = ast_alloca(alloc_size);
ast_copy_pj_str(call_id, &call_id_hdr->id, alloc_size);
}
/* Iterate each provided Contact header and add, update, or delete */
for (; (contact_hdr = (pjsip_contact_hdr *) pjsip_msg_find_hdr(rdata->msg_info.msg, PJSIP_H_CONTACT, contact_hdr->next)); pj_pool_reset(details.pool)) {
int expiration;
char contact_uri[pjsip_max_url_size];
RAII_VAR(struct ast_sip_contact *, contact, NULL, ao2_cleanup);
if (contact_hdr->star) {
/* A star means to unregister everything, so do so for the possible contacts */
ao2_callback(contacts, OBJ_NODATA | OBJ_UNLINK | OBJ_MULTIPLE,
registrar_delete_contact, (void *)aor_name);
/* If we are keeping track of existing contacts for removal then, well, there is
* absolutely nothing left so no need to try to remove any.
*/
if (existing_contacts) {
ao2_ref(existing_contacts, -1);
existing_contacts = NULL;
}
break;
}
if (!PJSIP_URI_SCHEME_IS_SIP(contact_hdr->uri) && !PJSIP_URI_SCHEME_IS_SIPS(contact_hdr->uri)) {
/* This registrar only currently supports sip: and sips: URI schemes */
continue;
}
expiration = registrar_get_expiration(aor, contact_hdr, rdata);
details.uri = pjsip_uri_get_uri(contact_hdr->uri);
pjsip_uri_print(PJSIP_URI_IN_CONTACT_HDR, details.uri, contact_uri, sizeof(contact_uri));
contact = ao2_callback(contacts, OBJ_UNLINK, registrar_find_contact, &details);
/* If a contact was returned and we need to keep track of existing contacts then it
* should be removed.
*/
if (contact && existing_contacts) {
ao2_unlink(existing_contacts, contact);
}
if (!contact) {
int prune_on_boot;
/* If they are actually trying to delete a contact that does not exist... be forgiving */
if (!expiration) {
ast_verb(3, "Attempted to remove non-existent contact '%s' from AOR '%s' by request\n",
contact_uri, aor_name);
continue;
}
prune_on_boot = !ast_sip_will_uri_survive_restart(details.uri, endpoint, rdata);
contact = ast_sip_location_create_contact(aor, contact_uri,
ast_tvadd(ast_tvnow(), ast_samp2tv(expiration, 1)),
path_str ? ast_str_buffer(path_str) : NULL,
user_agent, via_addr, via_port, call_id, prune_on_boot, endpoint);
if (!contact) {
ast_log(LOG_ERROR, "Unable to bind contact '%s' to AOR '%s'\n",
contact_uri, aor_name);
continue;
}
if (prune_on_boot) {
const char *contact_name;
struct contact_transport_monitor *monitor;
/*
* Monitor the transport in case it gets disconnected because
* the contact won't be valid anymore if that happens.
*/
contact_name = ast_sorcery_object_get_id(contact);
monitor = ao2_alloc_options(sizeof(*monitor) + 2 + strlen(aor_name)
+ strlen(contact_name), NULL, AO2_ALLOC_OPT_LOCK_NOLOCK);
if (monitor) {
strcpy(monitor->aor_name, aor_name);/* Safe */
monitor->contact_name = monitor->aor_name + strlen(aor_name) + 1;
strcpy(monitor->contact_name, contact_name);/* Safe */
ast_sip_transport_monitor_register(rdata->tp_info.transport,
register_contact_transport_shutdown_cb, monitor);
ao2_ref(monitor, -1);
}
}
ast_verb(3, "Added contact '%s' to AOR '%s' with expiration of %d seconds\n",
contact_uri, aor_name, expiration);
ast_test_suite_event_notify("AOR_CONTACT_ADDED",
"Contact: %s\r\n"
"AOR: %s\r\n"
"Expiration: %d\r\n"
"UserAgent: %s",
contact_uri,
aor_name,
expiration,
user_agent);
ao2_link(contacts, contact);
} else if (expiration) {
struct ast_sip_contact *contact_update;
contact_update = ast_sorcery_copy(ast_sip_get_sorcery(), contact);
if (!contact_update) {
ast_log(LOG_ERROR, "Failed to update contact '%s' expiration time to %d seconds.\n",
contact->uri, expiration);
continue;
}
contact_update->expiration_time = ast_tvadd(ast_tvnow(), ast_samp2tv(expiration, 1));
contact_update->qualify_frequency = aor->qualify_frequency;
contact_update->authenticate_qualify = aor->authenticate_qualify;
if (path_str) {
ast_string_field_set(contact_update, path, ast_str_buffer(path_str));
}
if (user_agent) {
ast_string_field_set(contact_update, user_agent, user_agent);
}
if (!ast_strlen_zero(ast_config_AST_SYSTEM_NAME)) {
ast_string_field_set(contact_update, reg_server, ast_config_AST_SYSTEM_NAME);
}
if (ast_sip_location_update_contact(contact_update)) {
ast_log(LOG_ERROR, "Failed to update contact '%s' expiration time to %d seconds.\n",
contact->uri, expiration);
ast_sip_location_delete_contact(contact);
continue;
}
ast_debug(3, "Refreshed contact '%s' on AOR '%s' with new expiration of %d seconds\n",
contact_uri, aor_name, expiration);
ast_test_suite_event_notify("AOR_CONTACT_REFRESHED",
"Contact: %s\r\n"
"AOR: %s\r\n"
"Expiration: %d\r\n"
"UserAgent: %s",
contact_uri,
aor_name,
expiration,
contact_update->user_agent);
ao2_link(contacts, contact_update);
ao2_cleanup(contact_update);
} else {
if (contact->prune_on_boot) {
struct contact_transport_monitor *monitor;
const char *contact_name =
ast_sorcery_object_get_id(contact);
monitor = ast_alloca(sizeof(*monitor) + 2 + strlen(aor_name)
+ strlen(contact_name));
strcpy(monitor->aor_name, aor_name);/* Safe */
monitor->contact_name = monitor->aor_name + strlen(aor_name) + 1;
strcpy(monitor->contact_name, contact_name);/* Safe */
ast_sip_transport_monitor_unregister(rdata->tp_info.transport,
register_contact_transport_shutdown_cb, monitor, contact_transport_monitor_matcher);
}
/* We want to report the user agent that was actually in the removed contact */
ast_sip_location_delete_contact(contact);
ast_verb(3, "Removed contact '%s' from AOR '%s' due to request\n", contact_uri, aor_name);
ast_test_suite_event_notify("AOR_CONTACT_REMOVED",
"Contact: %s\r\n"
"AOR: %s\r\n"
"UserAgent: %s",
contact_uri,
aor_name,
contact->user_agent);
}
}
pjsip_endpt_release_pool(ast_sip_get_pjsip_endpoint(), details.pool);
/*
* If the AOR is configured to remove any contacts over max_contacts
* that have not been updated/added/deleted as a result of this
* REGISTER do so.
*
* The existing contacts container holds all contacts that were not
* involved in this REGISTER.
* The contacts container holds the current contacts of the AOR.
*/
if (aor->remove_existing && existing_contacts) {
/* Total contacts after this registration */
contact_count = ao2_container_count(existing_contacts) + updated + added;
if (contact_count > aor->max_contacts) {
/* Remove excess existing contacts that expire the soonest */
remove_excess_contacts(existing_contacts, contacts, contact_count - aor->max_contacts);
}
ao2_ref(existing_contacts, -1);
}
response_contact = ao2_callback(contacts, 0, NULL, NULL);
/* Send a response containing all of the contacts (including static) that are present on this AOR */
if (ast_sip_create_response(rdata, 200, response_contact, &tdata) != PJ_SUCCESS) {
ao2_cleanup(response_contact);
ao2_cleanup(contacts);
response->code = 500;
return;
}
ao2_cleanup(response_contact);
/* Add the date header to the response, some UAs use this to set their date and time */
registrar_add_date_header(tdata);
ao2_callback(contacts, 0, registrar_add_contact, tdata);
if ((expires_hdr = pjsip_msg_find_hdr(rdata->msg_info.msg, PJSIP_H_EXPIRES, NULL))) {
expires_hdr = pjsip_expires_hdr_create(tdata->pool, registrar_get_expiration(aor, NULL, rdata));
pjsip_msg_add_hdr(tdata->msg, (pjsip_hdr*)expires_hdr);
}
response->tdata = tdata;
}
