const char *
call_get_attribute(sip_call_t *call, enum sip_attr_id id, char *value)
{
sip_msg_t *first, *last;
if (!call)
return NULL;
switch (id) {
case SIP_ATTR_CALLINDEX:
sprintf(value, "%d", call->index);
break;
case SIP_ATTR_CALLID:
sprintf(value, "%s", call->callid);
break;
case SIP_ATTR_XCALLID:
sprintf(value, "%s", call->xcallid);
break;
case SIP_ATTR_MSGCNT:
sprintf(value, "%d", vector_count(call->msgs));
break;
case SIP_ATTR_CALLSTATE:
sprintf(value, "%s", call_state_to_str(call->state));
break;
case SIP_ATTR_TRANSPORT:
first = vector_first(call->msgs);
sprintf(value, "%s", sip_transport_str(first->packet->type));
break;
case SIP_ATTR_CONVDUR:
timeval_to_duration(msg_get_time(call->cstart_msg), msg_get_time(call->cend_msg), value);
break;
case SIP_ATTR_TOTALDUR:
first = vector_first(call->msgs);
last = vector_last(call->msgs);
timeval_to_duration(msg_get_time(first), msg_get_time(last), value);
break;
default:
return msg_get_attribute(vector_first(call->msgs), id, value);
break;
}
return strlen(value) ? value : NULL;
}
void
call_update_state(sip_call_t *call, sip_msg_t *msg)
{
const char *callstate;
char dur[20];
int reqresp;
sip_msg_t *first;
if (!call_is_invite(call))
return;
// Get the first message in the call
first = vector_first(call->msgs);
// Get current message Method / Response Code
reqresp = msg->reqresp;
// If this message is actually a call, get its current state
if ((callstate = call_get_attribute(call, SIP_ATTR_CALLSTATE))) {
if (!strcmp(callstate, SIP_CALLSTATE_CALLSETUP)) {
if (reqresp == 200) {
// Alice and Bob are talking
call_set_attribute(call, SIP_ATTR_CALLSTATE, SIP_CALLSTATE_INCALL);
// Store the timestap where call has started
call->active = 1;
call->cstart_msg = msg;
} else if (reqresp == SIP_METHOD_CANCEL) {
// Alice is not in the mood
call_set_attribute(call, SIP_ATTR_CALLSTATE, SIP_CALLSTATE_CANCELLED);
// Store total call duration
call_set_attribute(call, SIP_ATTR_TOTALDUR, timeval_to_duration(msg_get_time(first), msg_get_time(msg), dur));
call->active = 0;
} else if (reqresp > 400) {
// Bob is not in the mood
call_set_attribute(call, SIP_ATTR_CALLSTATE, SIP_CALLSTATE_REJECTED);
// Store total call duration
call_set_attribute(call, SIP_ATTR_TOTALDUR, timeval_to_duration(msg_get_time(first), msg_get_time(msg), dur));
call->active = 0;
}
} else if (!strcmp(callstate, SIP_CALLSTATE_INCALL)) {
if (reqresp == SIP_METHOD_BYE) {
// Thanks for all the fish!
call_set_attribute(call, SIP_ATTR_CALLSTATE, SIP_CALLSTATE_COMPLETED);
// Store Conversation duration
call_set_attribute(call, SIP_ATTR_CONVDUR,
timeval_to_duration(msg_get_time(call->cstart_msg), msg_get_time(msg), dur));
call->active = 0;
}
} else if (reqresp == SIP_METHOD_INVITE && strcmp(callstate, SIP_CALLSTATE_INCALL)) {
// Call is being setup (after proper authentication)
call_set_attribute(call, SIP_ATTR_CALLSTATE, SIP_CALLSTATE_CALLSETUP);
call->active = 1;
} else {
// Store total call duration
call_set_attribute(call, SIP_ATTR_TOTALDUR, timeval_to_duration(msg_get_time(first), msg_get_time(msg), dur));
}
} else {
// This is actually a call
if (reqresp == SIP_METHOD_INVITE) {
call_set_attribute(call, SIP_ATTR_CALLSTATE, SIP_CALLSTATE_CALLSETUP);
call->active = 1;
}
}
}
