[mgcp] Introduce a policy CB for the MGCP protocol
The are three policies. Accept, Reject and Defer. This will
allow to handle network connections and such from the policy
callback instead of directly acting on it.
diff --git a/openbsc/src/mgcp/mgcp_protocol.c b/openbsc/src/mgcp/mgcp_protocol.c
index 0fe33dd..bd47f8c 100644
--- a/openbsc/src/mgcp/mgcp_protocol.c
+++ b/openbsc/src/mgcp/mgcp_protocol.c
@@ -455,6 +455,25 @@
if (endp->ci == CI_UNUSED)
goto error2;
+ /* policy CB */
+ if (cfg->policy_cb) {
+ switch (cfg->policy_cb(cfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_CRCX, trans_id)) {
+ case MGCP_POLICY_REJECT:
+ LOGP(DMGCP, LOGL_NOTICE, "CRCX rejected by policy on 0x%x\n",
+ ENDPOINT_NUMBER(endp));
+ mgcp_free_endp(endp);
+ return create_response(500, "CRCX", trans_id);
+ break;
+ case MGCP_POLICY_DEFER:
+ /* stop processing */
+ return NULL;
+ break;
+ case MGCP_POLICY_CONT:
+ /* just continue */
+ break;
+ }
+ }
+
LOGP(DMGCP, LOGL_NOTICE, "Creating endpoint on: 0x%x CI: %u port: %u\n",
ENDPOINT_NUMBER(endp), endp->ci, endp->rtp_port);
if (cfg->change_cb)
@@ -548,6 +567,24 @@
}
MSG_TOKENIZE_END
+ /* policy CB */
+ if (cfg->policy_cb) {
+ switch (cfg->policy_cb(cfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_MDCX, trans_id)) {
+ case MGCP_POLICY_REJECT:
+ LOGP(DMGCP, LOGL_NOTICE, "MDCX rejected by policy on 0x%x\n",
+ ENDPOINT_NUMBER(endp));
+ return create_response(500, "MDCX", trans_id);
+ break;
+ case MGCP_POLICY_DEFER:
+ /* stop processing */
+ return NULL;
+ break;
+ case MGCP_POLICY_CONT:
+ /* just continue */
+ break;
+ }
+ }
+
/* modify */
LOGP(DMGCP, LOGL_NOTICE, "Modified endpoint on: 0x%x Server: %s:%u\n",
ENDPOINT_NUMBER(endp), inet_ntoa(endp->remote), ntohs(endp->net_rtp));
@@ -602,6 +639,24 @@
}
MSG_TOKENIZE_END
+ /* policy CB */
+ if (cfg->policy_cb) {
+ switch (cfg->policy_cb(cfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_DLCX, trans_id)) {
+ case MGCP_POLICY_REJECT:
+ LOGP(DMGCP, LOGL_NOTICE, "DLCX rejected by policy on 0x%x\n",
+ ENDPOINT_NUMBER(endp));
+ return create_response(500, "DLCX", trans_id);
+ break;
+ case MGCP_POLICY_DEFER:
+ /* stop processing */
+ return NULL;
+ break;
+ case MGCP_POLICY_CONT:
+ /* just continue */
+ break;
+ }
+ }
+
/* free the connection */
mgcp_free_endp(endp);
if (cfg->change_cb)