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[mgcp] Protocol extension to not generate answers. 

For the NAT we want to send requests in a send and forget
way and we are not interested in seeing the answers, so tell
the gateway to not answer them.
This commit is contained in:
Holger Hans Peter Freyther 2010-04-22 11:58:13 +08:00
parent 74076934fb
commit e3d16bb775
1 changed files with 24 additions and 0 deletions
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24
openbsc/src/mgcp/mgcp_protocol.c
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@ -485,6 +485,7 @@ static struct msgb *handle_modify_con(struct mgcp_config *cfg, struct msgb *msg)
const char *trans_id;
struct mgcp_endpoint *endp;
int error_code = 500;
int silent = 0;
found = mgcp_analyze_header(cfg, msg, data_ptrs, ARRAY_SIZE(data_ptrs), &trans_id, &endp);
if (found != 0)
@ -517,6 +518,9 @@ static struct msgb *handle_modify_con(struct mgcp_config *cfg, struct msgb *msg)
goto error3;
}
break;
case 'Z':
silent = strcmp("noanswer", (const char *)&msg->l3h[line_start + 3]) == 0;
break;
case '\0':
/* SDP file begins */
break;
@ -562,6 +566,8 @@ static struct msgb *handle_modify_con(struct mgcp_config *cfg, struct msgb *msg)
case MGCP_POLICY_REJECT:
LOGP(DMGCP, LOGL_NOTICE, "MDCX rejected by policy on 0x%x\n",
ENDPOINT_NUMBER(endp));
if (silent)
goto out_silent;
return create_response(500, "MDCX", trans_id);
break;
case MGCP_POLICY_DEFER:
@ -579,6 +585,9 @@ static struct msgb *handle_modify_con(struct mgcp_config *cfg, struct msgb *msg)
ENDPOINT_NUMBER(endp), inet_ntoa(endp->remote), ntohs(endp->net_rtp));
if (cfg->change_cb)
cfg->change_cb(cfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_MDCX, endp->rtp_port);
if (silent)
goto out_silent;
return create_response_with_sdp(endp, "MDCX", trans_id);
error:
@ -589,6 +598,10 @@ error:
error3:
return create_response(error_code, "MDCX", trans_id);
out_silent:
return NULL;
}
static struct msgb *handle_delete_con(struct mgcp_config *cfg, struct msgb *msg)
@ -598,6 +611,7 @@ static struct msgb *handle_delete_con(struct mgcp_config *cfg, struct msgb *msg)
const char *trans_id;
struct mgcp_endpoint *endp;
int error_code = 500;
int silent = 0;
found = mgcp_analyze_header(cfg, msg, data_ptrs, ARRAY_SIZE(data_ptrs), &trans_id, &endp);
if (found != 0)
@ -619,6 +633,9 @@ static struct msgb *handle_delete_con(struct mgcp_config *cfg, struct msgb *msg)
if (verify_ci(endp, (const char *)&msg->l3h[line_start + 3]) != 0)
goto error3;
break;
case 'Z':
silent = strcmp("noanswer", (const char *)&msg->l3h[line_start + 3]) == 0;
break;
}
default:
LOGP(DMGCP, LOGL_NOTICE, "Unhandled option: '%c'/%d on 0x%x\n",
@ -634,6 +651,8 @@ static struct msgb *handle_delete_con(struct mgcp_config *cfg, struct msgb *msg)
case MGCP_POLICY_REJECT:
LOGP(DMGCP, LOGL_NOTICE, "DLCX rejected by policy on 0x%x\n",
ENDPOINT_NUMBER(endp));
if (silent)
goto out_silent;
return create_response(500, "DLCX", trans_id);
break;
case MGCP_POLICY_DEFER:
@ -653,6 +672,8 @@ static struct msgb *handle_delete_con(struct mgcp_config *cfg, struct msgb *msg)
if (cfg->change_cb)
cfg->change_cb(cfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_DLCX, endp->rtp_port);
if (silent)
goto out_silent;
return create_response(250, "DLCX", trans_id);
error:
@ -663,6 +684,9 @@ error:
error3:
return create_response(error_code, "DLCX", trans_id);
out_silent:
return NULL;
}
static struct msgb *handle_rsip(struct mgcp_config *cfg, struct msgb *msg)