// Reject request unless it's a SUBSCRIBE targeted at the home domain / this node.
pj_bool_t subscription_on_rx_request(pjsip_rx_data *rdata)
{
SAS::TrailId trail = get_trail(rdata);
if (rdata->tp_info.transport->local_name.port != stack_data.scscf_port)
{
// Not an S-CSCF, so don't handle SUBSCRIBEs.
return PJ_FALSE; // LCOV_EXCL_LINE
}
if (pjsip_method_cmp(&rdata->msg_info.msg->line.req.method, pjsip_get_subscribe_method()))
{
// This isn't a SUBSCRIBE, so this module can't process it.
return PJ_FALSE;
}
if (!((PJUtils::is_home_domain(rdata->msg_info.msg->line.req.uri) ||
(PJUtils::is_uri_local(rdata->msg_info.msg->line.req.uri))) &&
PJUtils::check_route_headers(rdata)))
{
LOG_DEBUG("Rejecting subscription request not targeted at this domain or node");
SAS::Event event(trail, SASEvent::SUBSCRIBE_FAILED_EARLY_DOMAIN, 0);
SAS::report_event(event);
return PJ_FALSE;
}
// SUBSCRIBE request targeted at the home domain or specifically at this node. Check
// whether it should be processed by this module or passed up to an AS.
pjsip_msg *msg = rdata->msg_info.msg;
// A valid subscription must have the Event header set to "reg". This is case-sensitive
pj_str_t event_name = pj_str("Event");
pjsip_event_hdr* event = (pjsip_event_hdr*)pjsip_msg_find_hdr_by_name(msg, &event_name, NULL);
if (!event || (PJUtils::pj_str_to_string(&event->event_type) != "reg"))
{
// The Event header is missing or doesn't match "reg"
LOG_DEBUG("Rejecting subscription request with invalid event header");
SAS::Event sas_event(trail, SASEvent::SUBSCRIBE_FAILED_EARLY_EVENT, 0);
if (event)
{
char event_hdr_str[256];
memset(event_hdr_str, 0, 256);
pjsip_hdr_print_on(event, event_hdr_str, 255);
sas_event.add_var_param(event_hdr_str);
}
SAS::report_event(sas_event);
return PJ_FALSE;
}
// Accept header may be present - if so must include the application/reginfo+xml
pjsip_accept_hdr* accept = (pjsip_accept_hdr*)pjsip_msg_find_hdr(msg, PJSIP_H_ACCEPT, NULL);
if (accept)
{
bool found = false;
pj_str_t reginfo = pj_str("application/reginfo+xml");
for (uint32_t i = 0; i < accept->count; i++)
{
if (!pj_strcmp(accept->values + i, ®info))
{
found = true;
}
}
if (!found)
{
// The Accept header (if it exists) doesn't contain "application/reginfo+xml"
LOG_DEBUG("Rejecting subscription request with invalid accept header");
char accept_hdr_str[256];
memset(accept_hdr_str, 0, 256);
pjsip_hdr_print_on(accept, accept_hdr_str, 255);
SAS::Event event(trail, SASEvent::SUBSCRIBE_FAILED_EARLY_ACCEPT, 0);
event.add_var_param(accept_hdr_str);
SAS::report_event(event);
return PJ_FALSE;
}
}
process_subscription_request(rdata);
return PJ_TRUE;
}
// Check whether this request should be absorbed by the subscription module
bool SubscriptionSproutlet::handle_request(pjsip_msg* req,
SAS::TrailId trail)
{
if (pjsip_method_cmp(&req->line.req.method, pjsip_get_subscribe_method()))
{
// This isn't a SUBSCRIBE, so this module can't process it.
return false;
}
URIClass uri_class = URIClassifier::classify_uri(req->line.req.uri);
if (((uri_class != NODE_LOCAL_SIP_URI) &&
(uri_class != HOME_DOMAIN_SIP_URI) &&
(uri_class != GLOBAL_PHONE_NUMBER) &&
(uri_class != LOCAL_PHONE_NUMBER)) ||
!PJUtils::check_route_headers(req))
{
TRC_DEBUG("Not processing subscription request not targeted at this domain "
"or node");
SAS::Event event(trail, SASEvent::SUBSCRIBE_FAILED_EARLY_DOMAIN, 0);
SAS::report_event(event);
return false;
}
// We now know we have a SUBSCRIBE request targeted at the home domain
// or specifically at this node. Check whether it should be processed
// by this module or passed up to an AS.
// A valid subscription must have the Event header set to "reg". This is
// case-sensitive.
pj_str_t event_name = pj_str((char*)"Event");
pjsip_event_hdr* event =
(pjsip_event_hdr*)pjsip_msg_find_hdr_by_name(req, &event_name, NULL);
if (!event || (PJUtils::pj_str_to_string(&event->event_type) != "reg"))
{
// The Event header is missing or doesn't match "reg"
TRC_DEBUG("Not processing subscribe that's not for the 'reg' package");
SAS::Event sas_event(trail, SASEvent::SUBSCRIBE_FAILED_EARLY_EVENT, 0);
if (event)
{
char event_hdr_str[256];
memset(event_hdr_str, 0, 256);
pjsip_hdr_print_on(event, event_hdr_str, 255);
sas_event.add_var_param(event_hdr_str);
}
SAS::report_event(sas_event);
return false;
}
// Accept header may be present - if so must include application/reginfo+xml
pjsip_accept_hdr* accept =
(pjsip_accept_hdr*)pjsip_msg_find_hdr(req, PJSIP_H_ACCEPT, NULL);
if (accept)
{
bool found = false;
pj_str_t reginfo = pj_str((char*)"application/reginfo+xml");
for (uint32_t i = 0; i < accept->count; i++)
{
if (!pj_strcmp(accept->values + i, ®info))
{
found = true;
break;
}
}
if (!found)
{
// The Accept header (if it exists) doesn't contain
// "application/reginfo+xml"
TRC_DEBUG("Not processing subscription request that doesn't "
"accept reginfo notifications");
char accept_hdr_str[256];
memset(accept_hdr_str, 0, 256);
pjsip_hdr_print_on(accept, accept_hdr_str, 255);
SAS::Event event(trail, SASEvent::SUBSCRIBE_FAILED_EARLY_ACCEPT, 0);
event.add_var_param(accept_hdr_str);
SAS::report_event(event);
return false;
}
}
return true;
}
