/**
* Get the first connect peer that matches the routing mechanisms.
* - First the Destination-Host AVP value is tried if connected (the peer does not have to
* be in the routing table at all).
* - Then we look for a connected peer in the specific realm for the Destination-Realm AVP
* - Then we look for the first connected peer in the default routes
* @param m - the Diameter message to find the destination peer for
* @returns - the connected peer or null if none connected found
*/
peer* get_routing_peer(cdp_session_t* cdp_session, AAAMessage *m) {
str destination_realm = {0, 0}, destination_host = {0, 0};
AAA_AVP *avp, *avp_vendor, *avp2;
AAA_AVP_LIST group;
peer *p;
routing_realm *rr;
int app_id = 0, vendor_id = 0;
LM_DBG("getting diameter routing peer for realm: [%.*s]\n", m->dest_realm->data.len, m->dest_realm->data.s);
app_id = m->applicationId;
avp = AAAFindMatchingAVP(m, 0, AVP_Vendor_Specific_Application_Id, 0, AAA_FORWARD_SEARCH);
if (avp) {
group = AAAUngroupAVPS(avp->data);
avp_vendor = AAAFindMatchingAVPList(group, group.head, AVP_Vendor_Id, 0, 0);
avp2 = AAAFindMatchingAVPList(group, group.head, AVP_Auth_Application_Id, 0, 0);
if (avp_vendor && avp2) {
vendor_id = get_4bytes(avp_vendor->data.s);
app_id = get_4bytes(avp2->data.s);
}
avp2 = AAAFindMatchingAVPList(group, group.head, AVP_Acct_Application_Id, 0, 0);
if (avp_vendor && avp2) {
vendor_id = get_4bytes(avp_vendor->data.s);
app_id = get_4bytes(avp2->data.s);
}
AAAFreeAVPList(&group);
}
avp_vendor = AAAFindMatchingAVP(m, 0, AVP_Vendor_Id, 0, AAA_FORWARD_SEARCH);
avp = AAAFindMatchingAVP(m, 0, AVP_Auth_Application_Id, 0, AAA_FORWARD_SEARCH);
if (avp) {
if (avp_vendor) vendor_id = get_4bytes(avp_vendor->data.s);
else vendor_id = 0;
app_id = get_4bytes(avp->data.s);
}
avp = AAAFindMatchingAVP(m, 0, AVP_Acct_Application_Id, 0, AAA_FORWARD_SEARCH);
if (avp) {
if (avp_vendor) vendor_id = get_4bytes(avp_vendor->data.s);
else vendor_id = 0;
app_id = get_4bytes(avp->data.s);
}
avp = AAAFindMatchingAVP(m, 0, AVP_Destination_Host, 0, AAA_FORWARD_SEARCH);
if (avp) destination_host = avp->data;
if (destination_host.len) {
/* There is a destination host present in the message try and route directly there */
p = get_peer_by_fqdn(&destination_host);
if (p && (p->state == I_Open || p->state == R_Open) && peer_handles_application(p, app_id, vendor_id)) {
p->last_selected = time(NULL);
return p;
}
/* the destination host peer is not connected at the moment, try a normal route then */
}
avp = AAAFindMatchingAVP(m, 0, AVP_Destination_Realm, 0, AAA_FORWARD_SEARCH);
if (avp) destination_realm = avp->data;
if (!config->r_table) {
LM_ERR("get_routing_peer(): Empty routing table.\n");
return 0;
}
if (destination_realm.len) {
/* first search for the destination realm */
for (rr = config->r_table->realms; rr; rr = rr->next)
if (rr->realm.len == destination_realm.len &&
strncasecmp(rr->realm.s, destination_realm.s, destination_realm.len) == 0)
break;
if (rr) {
p = get_first_connected_route(cdp_session, rr->routes, app_id, vendor_id);
if (p) return p;
else LM_ERR("get_routing_peer(): No connected Route peer found for Realm <%.*s>. Trying DefaultRoutes next...\n",
destination_realm.len, destination_realm.s);
}
}
/* if not found in the realms or no destination_realm,
* get the first connected host in default routes */
LM_DBG("no routing peer found, trying default route\n");
p = get_first_connected_route(cdp_session, config->r_table->routes, app_id, vendor_id);
if (!p) {
LM_ERR("get_routing_peer(): No connected DefaultRoute peer found for app_id %d and vendor id %d.\n",
app_id, vendor_id);
}
return p;
}
void save_peer_applications(peer *p,AAAMessage *msg)
{
int total_cnt=0;
int supported_vendor_id_avp_cnt = 0;
AAA_AVP *avp,*avp_vendor,*avp2;
AAA_AVP_LIST group;
int id,vendor;
if (p->applications) {
shm_free(p->applications);
p->applications = 0;
p->applications_cnt = 0;
}
supported_vendor_id_avp_cnt = count_Supported_Vendor_Id_AVPS(msg);
for(avp=msg->avpList.head;avp;avp = avp->next)
switch (avp->code){
case AVP_Auth_Application_Id:
total_cnt += supported_vendor_id_avp_cnt;
break;
case AVP_Acct_Application_Id:
total_cnt += supported_vendor_id_avp_cnt;
break;
case AVP_Vendor_Specific_Application_Id:
total_cnt+=2;/* wasteful, but let's skip decoding */
break;
}
p->applications_cnt = 0;
p->applications = shm_malloc(sizeof(app_config)*total_cnt);
if (!p->applications){
LM_ERR("save_peer_applications(): Error allocating %ld bytes! No applications saved...\n",
(long int)(sizeof(app_config)*total_cnt));
return;
}
for(avp=msg->avpList.head;avp;avp = avp->next)
{
switch (avp->code){
case AVP_Auth_Application_Id:
id = get_4bytes(avp->data.s);
add_peer_application(p,id,0,DP_AUTHORIZATION);
avp_vendor = AAAFindMatchingAVP(msg,0,AVP_Supported_Vendor_Id,0,0);
while (avp_vendor) {
vendor = get_4bytes(avp_vendor->data.s);
LM_DBG("Found Supported Vendor for Application %i: %i\n", DP_AUTHORIZATION, vendor);
add_peer_application(p,id,vendor,DP_AUTHORIZATION);
if (!avp_vendor->next)
break;
avp_vendor = AAAFindMatchingAVP(msg,avp_vendor->next,AVP_Supported_Vendor_Id,0,AAA_FORWARD_SEARCH);
}
break;
case AVP_Acct_Application_Id:
id = get_4bytes(avp->data.s);
add_peer_application(p,id,0,DP_ACCOUNTING);
avp_vendor = AAAFindMatchingAVP(msg,0,AVP_Supported_Vendor_Id,0,0);
while (avp_vendor) {
vendor = get_4bytes(avp_vendor->data.s);
LM_DBG("Found Supported Vendor for Application %i: %i\n", DP_ACCOUNTING, vendor);
add_peer_application(p,id,vendor,DP_ACCOUNTING);
if (!avp_vendor->next)
break;
avp_vendor = AAAFindMatchingAVP(msg,avp_vendor->next,AVP_Supported_Vendor_Id,0,AAA_FORWARD_SEARCH);
}
break;
case AVP_Vendor_Specific_Application_Id:
group = AAAUngroupAVPS(avp->data);
avp_vendor = AAAFindMatchingAVPList(group,group.head,AVP_Vendor_Id,0,0);
avp2 = AAAFindMatchingAVPList(group,group.head,AVP_Auth_Application_Id,0,AAA_FORWARD_SEARCH);
if (avp_vendor&&avp2){
vendor = get_4bytes(avp_vendor->data.s);
id = get_4bytes(avp2->data.s);
add_peer_application(p,id,vendor,DP_AUTHORIZATION);
}
avp2 = AAAFindMatchingAVPList(group,group.head,AVP_Acct_Application_Id,0,AAA_FORWARD_SEARCH);
if (avp_vendor&&avp2){
vendor = get_4bytes(avp_vendor->data.s);
id = get_4bytes(avp2->data.s);
add_peer_application(p,id,vendor,DP_ACCOUNTING);
}
AAAFreeAVPList(&group);
break;
}
}
}
