/// Create an AsChain.
//
// Ownership of `ifcs` passes to this object.
//
// See `AsChainLink::create_as_chain` for rules re releasing the
// created references.
AsChain::AsChain(AsChainTable* as_chain_table,
const SessionCase& session_case,
const std::string& served_user,
bool is_registered,
SAS::TrailId trail,
Ifcs& ifcs,
ACR* acr,
FIFCService* fifc_service,
IFCConfiguration ifc_configuration) :
_as_chain_table(as_chain_table),
_refs(1), // for the initial chain link being returned
_as_info(ifcs.size() + 1),
_odi_tokens(),
_responsive(ifcs.size() + 1),
_session_case(session_case),
_served_user(served_user),
_is_registered(is_registered),
_trail(trail),
_ifcs(ifcs),
_acr(acr),
_fallback_ifcs({}),
_ifc_configuration(ifc_configuration),
_using_standard_ifcs(true),
_root(NULL)
{
TRC_DEBUG("Creating AsChain %p with %d IFCs and adding to map", this, ifcs.size());
_as_chain_table->register_(this, _odi_tokens);
TRC_DEBUG("Attached ACR (%p) to chain", _acr);
// We need to initialize `_responsive` as bools are PODs which are not
// initialized.
for(std::vector<bool>::iterator it = _responsive.begin();
it != _responsive.end();
++it)
{
*it = false;
}
if ((fifc_service) && (_ifc_configuration._apply_fallback_ifcs))
{
_root = new rapidxml::xml_document<>;
_fallback_ifcs = fifc_service->get_fallback_ifcs(_root);
}
}
/// Create an AsChain.
//
// Ownership of `ifcs` passes to this object.
//
// See `AsChainLink::create_as_chain` for rules re releasing the
// created references.
AsChain::AsChain(AsChainTable* as_chain_table,
const SessionCase& session_case,
const std::string& served_user,
bool is_registered,
SAS::TrailId trail,
Ifcs& ifcs,
ACR* acr) :
_as_chain_table(as_chain_table),
_refs(1), // for the initial chain link being returned
_as_info(ifcs.size() + 1),
_odi_tokens(),
_session_case(session_case),
_served_user(served_user),
_is_registered(is_registered),
_trail(trail),
_ifcs(ifcs),
_acr(acr)
{
LOG_DEBUG("Creating AsChain %p with %d IFC and adding to map", this, ifcs.size());
_as_chain_table->register_(this, _odi_tokens);
LOG_DEBUG("Attached ACR (%p) to chain", _acr);
}
void RegistrationUtils::register_with_application_servers(Ifcs& ifcs,
RegStore* store,
pjsip_rx_data *received_register,
pjsip_tx_data *ok_response, // Can only be NULL if received_register is
int expires,
bool is_initial_registration,
const std::string& served_user,
SAS::TrailId trail)
{
// Function preconditions
if (received_register == NULL)
{
// We should have both messages or neither
assert(ok_response == NULL);
}
else
{
// We should have both messages or neither
assert(ok_response != NULL);
}
std::vector<AsInvocation> as_list;
// Choice of SessionCase::Originating is not arbitrary - we don't expect iFCs to specify SessionCase
// constraints for REGISTER messages, but we only get the served user from the From address in an
// Originating message, otherwise we use the Request-URI. We need to use the From for REGISTERs.
// See 3GPP TS 23.218 s5.2.1 note 2: "REGISTER is considered part of the UE-originating".
if (received_register == NULL)
{
pj_status_t status;
pjsip_method method;
pjsip_method_set(&method, PJSIP_REGISTER_METHOD);
pjsip_tx_data *tdata;
std::string served_user_uri_string = "<"+served_user+">";
const pj_str_t served_user_uri = pj_str(const_cast<char *>(served_user_uri_string.c_str()));
LOG_INFO("Generating a fake REGISTER to send to IfcHandler using AOR %s", served_user.c_str());
SAS::Event event(trail, SASEvent::REGISTER_AS_START, 0);
event.add_var_param(served_user);
SAS::report_event(event);
status = pjsip_endpt_create_request(stack_data.endpt,
&method, // Method
&stack_data.scscf_uri, // Target
&served_user_uri, // From
&served_user_uri, // To
&served_user_uri, // Contact
NULL, // Auto-generate Call-ID
1, // CSeq
NULL, // No body
&tdata); // OUT
assert(status == PJ_SUCCESS);
// As per TS 24.229, section 5.4.1.7, note 1, we don't fill in any P-Associated-URI details.
ifcs.interpret(SessionCase::Originating, true, is_initial_registration, tdata->msg, as_list, trail);
status = pjsip_tx_data_dec_ref(tdata);
assert(status == PJSIP_EBUFDESTROYED);
}
else
{
ifcs.interpret(SessionCase::Originating, true, is_initial_registration, received_register->msg_info.msg, as_list, trail);
}
LOG_INFO("Found %d Application Servers", as_list.size());
// Loop through the as_list
for (std::vector<AsInvocation>::iterator as_iter = as_list.begin();
as_iter != as_list.end();
as_iter++)
{
send_register_to_as(received_register, ok_response, *as_iter, expires, served_user, trail);
}
}