static pj_bool_t on_rx_request( pjsip_rx_data *rdata )
{
pj_sockaddr hostaddr;
char temp[80], hostip[PJ_INET6_ADDRSTRLEN];
pj_str_t local_uri;
pjsip_dialog *dlg;
pjsip_rdata_sdp_info *sdp_info;
pjmedia_sdp_session *answer = NULL;
pjsip_tx_data *tdata = NULL;
call_t *call = NULL;
unsigned i;
pj_status_t status;
PJ_LOG(3,(THIS_FILE, "RX %.*s from %s",
(int)rdata->msg_info.msg->line.req.method.name.slen,
rdata->msg_info.msg->line.req.method.name.ptr,
rdata->pkt_info.src_name));
if (rdata->msg_info.msg->line.req.method.id == PJSIP_REGISTER_METHOD) {
/* Let me be a registrar! */
pjsip_hdr hdr_list, *h;
pjsip_msg *msg;
int expires = -1;
pj_list_init(&hdr_list);
msg = rdata->msg_info.msg;
h = (pjsip_hdr*)pjsip_msg_find_hdr(msg, PJSIP_H_EXPIRES, NULL);
if (h) {
expires = ((pjsip_expires_hdr*)h)->ivalue;
pj_list_push_back(&hdr_list, pjsip_hdr_clone(rdata->tp_info.pool, h));
PJ_LOG(3,(THIS_FILE, " Expires=%d", expires));
}
if (expires != 0) {
h = (pjsip_hdr*)pjsip_msg_find_hdr(msg, PJSIP_H_CONTACT, NULL);
if (h)
pj_list_push_back(&hdr_list, pjsip_hdr_clone(rdata->tp_info.pool, h));
}
pjsip_endpt_respond(app.sip_endpt, &mod_sipecho, rdata, 200, NULL,
&hdr_list, NULL, NULL);
return PJ_TRUE;
}
if (rdata->msg_info.msg->line.req.method.id != PJSIP_INVITE_METHOD) {
if (rdata->msg_info.msg->line.req.method.id != PJSIP_ACK_METHOD) {
pj_str_t reason = pj_str("Go away");
pjsip_endpt_respond_stateless( app.sip_endpt, rdata,
400, &reason,
NULL, NULL);
}
return PJ_TRUE;
}
sdp_info = pjsip_rdata_get_sdp_info(rdata);
if (!sdp_info || !sdp_info->sdp) {
pj_str_t reason = pj_str("Require valid offer");
pjsip_endpt_respond_stateless( app.sip_endpt, rdata,
400, &reason,
NULL, NULL);
}
for (i=0; i<MAX_CALLS; ++i) {
if (app.call[i].inv == NULL) {
call = &app.call[i];
break;
}
}
if (i==MAX_CALLS) {
pj_str_t reason = pj_str("We're full");
pjsip_endpt_respond_stateless( app.sip_endpt, rdata,
PJSIP_SC_BUSY_HERE, &reason,
NULL, NULL);
return PJ_TRUE;
}
/* Generate Contact URI */
status = pj_gethostip(AF, &hostaddr);
if (status != PJ_SUCCESS) {
app_perror(THIS_FILE, "Unable to retrieve local host IP", status);
return PJ_TRUE;
}
pj_sockaddr_print(&hostaddr, hostip, sizeof(hostip), 2);
pj_ansi_sprintf(temp, "<sip:sipecho@%s:%d>", hostip, SIP_PORT);
local_uri = pj_str(temp);
status = pjsip_dlg_create_uas( pjsip_ua_instance(), rdata,
&local_uri, &dlg);
if (status == PJ_SUCCESS)
answer = create_answer(call-app.call, dlg->pool, sdp_info->sdp);
if (status == PJ_SUCCESS)
status = pjsip_inv_create_uas( dlg, rdata, answer, 0, &call->inv);
if (status == PJ_SUCCESS)
status = pjsip_inv_initial_answer(call->inv, rdata, 100,
NULL, NULL, &tdata);
if (status == PJ_SUCCESS)
status = pjsip_inv_send_msg(call->inv, tdata);
if (status == PJ_SUCCESS)
status = pjsip_inv_answer(call->inv, 180, NULL,
NULL, &tdata);
if (status == PJ_SUCCESS)
status = pjsip_inv_send_msg(call->inv, tdata);
if (status == PJ_SUCCESS)
status = pjsip_inv_answer(call->inv, 200, NULL,
NULL, &tdata);
if (status == PJ_SUCCESS)
status = pjsip_inv_send_msg(call->inv, tdata);
if (status != PJ_SUCCESS) {
pjsip_endpt_respond_stateless( app.sip_endpt, rdata,
500, NULL, NULL, NULL);
destroy_call(call);
} else {
call->inv->mod_data[mod_sipecho.id] = call;
}
return PJ_TRUE;
}
/*
* Callback when incoming requests outside any transactions and any
* dialogs are received. We're only interested to hande incoming INVITE
* request, and we'll reject any other requests with 500 response.
*/
static pj_bool_t on_rx_request( pjsip_rx_data *rdata )
{
pj_sockaddr hostaddr;
char temp[80], hostip[PJ_INET6_ADDRSTRLEN];
pj_str_t local_uri;
pjsip_dialog *dlg;
pjmedia_sdp_session *local_sdp;
pjsip_tx_data *tdata;
unsigned options = 0;
pj_status_t status;
/*
* Respond (statelessly) any non-INVITE requests with 500
*/
if (rdata->msg_info.msg->line.req.method.id != PJSIP_INVITE_METHOD) {
if (rdata->msg_info.msg->line.req.method.id != PJSIP_ACK_METHOD) {
pj_str_t reason = pj_str("Simple UA unable to handle "
"this request");
pjsip_endpt_respond_stateless( g_endpt, rdata,
500, &reason,
NULL, NULL);
}
return PJ_TRUE;
}
/*
* Reject INVITE if we already have an INVITE session in progress.
*/
if (g_inv) {
pj_str_t reason = pj_str("Another call is in progress");
pjsip_endpt_respond_stateless( g_endpt, rdata,
500, &reason,
NULL, NULL);
return PJ_TRUE;
}
/* Verify that we can handle the request. */
status = pjsip_inv_verify_request(rdata, &options, NULL, NULL,
g_endpt, NULL);
if (status != PJ_SUCCESS) {
pj_str_t reason = pj_str("Sorry Simple UA can not handle this INVITE");
pjsip_endpt_respond_stateless( g_endpt, rdata,
500, &reason,
NULL, NULL);
return PJ_TRUE;
}
/*
* Generate Contact URI
*/
if (pj_gethostip(AF, &hostaddr) != PJ_SUCCESS) {
app_perror(THIS_FILE, "Unable to retrieve local host IP", status);
return PJ_TRUE;
}
pj_sockaddr_print(&hostaddr, hostip, sizeof(hostip), 2);
pj_ansi_sprintf(temp, "<sip:simpleuas@%s:%d>",
hostip, SIP_PORT);
local_uri = pj_str(temp);
/*
* Create UAS dialog.
*/
status = pjsip_dlg_create_uas( pjsip_ua_instance(),
rdata,
&local_uri, /* contact */
&dlg);
if (status != PJ_SUCCESS) {
pjsip_endpt_respond_stateless(g_endpt, rdata, 500, NULL,
NULL, NULL);
return PJ_TRUE;
}
/*
* Get media capability from media endpoint:
*/
status = pjmedia_endpt_create_sdp( g_med_endpt, rdata->tp_info.pool,
MAX_MEDIA_CNT, g_sock_info, &local_sdp);
PJ_ASSERT_RETURN(status == PJ_SUCCESS, PJ_TRUE);
/*
* Create invite session, and pass both the UAS dialog and the SDP
* capability to the session.
*/
status = pjsip_inv_create_uas( dlg, rdata, local_sdp, 0, &g_inv);
PJ_ASSERT_RETURN(status == PJ_SUCCESS, PJ_TRUE);
/*
* Initially send 180 response.
*
* The very first response to an INVITE must be created with
* pjsip_inv_initial_answer(). Subsequent responses to the same
* transaction MUST use pjsip_inv_answer().
*/
status = pjsip_inv_initial_answer(g_inv, rdata,
180,
NULL, NULL, &tdata);
PJ_ASSERT_RETURN(status == PJ_SUCCESS, PJ_TRUE);
/* Send the 180 response. */
status = pjsip_inv_send_msg(g_inv, tdata);
PJ_ASSERT_RETURN(status == PJ_SUCCESS, PJ_TRUE);
/*
* Now create 200 response.
*/
status = pjsip_inv_answer( g_inv,
200, NULL, /* st_code and st_text */
NULL, /* SDP already specified */
&tdata);
PJ_ASSERT_RETURN(status == PJ_SUCCESS, PJ_TRUE);
/*
* Send the 200 response.
*/
status = pjsip_inv_send_msg(g_inv, tdata);
PJ_ASSERT_RETURN(status == PJ_SUCCESS, PJ_TRUE);
/* Done.
* When the call is disconnected, it will be reported via the callback.
*/
return PJ_TRUE;
}
