PJ_DEF(void) pjmedia_rtp_session_update( pjmedia_rtp_session *ses,
const pjmedia_rtp_hdr *hdr,
pjmedia_rtp_status *p_seq_st)
{
pjmedia_rtp_session_update2(ses, hdr, p_seq_st, PJ_TRUE);
}
static void read_rtp(pj_uint8_t *buf, pj_size_t bufsize,
pjmedia_rtp_hdr **rtp,
pj_uint8_t **payload,
unsigned *payload_size,
pj_bool_t check_pt)
{
pj_status_t status;
/* Init RTP session */
if (!app.rtp_sess_init) {
T(pjmedia_rtp_session_init(&app.rtp_sess, 0, 0));
app.rtp_sess_init = PJ_TRUE;
}
/* Loop reading until we have a good RTP packet */
for (;;) {
pj_size_t sz = bufsize;
const pjmedia_rtp_hdr *r;
const void *p;
pjmedia_rtp_status seq_st;
status = pj_pcap_read_udp(app.pcap, NULL, buf, &sz);
if (status != PJ_SUCCESS)
err_exit("Error reading PCAP file", status);
/* Decode RTP packet to make sure that this is an RTP packet.
* We will decode it again to get the payload after we do
* SRTP decoding
*/
status = pjmedia_rtp_decode_rtp(&app.rtp_sess, buf, (int)sz, &r,
&p, payload_size);
if (status != PJ_SUCCESS) {
char errmsg[PJ_ERR_MSG_SIZE];
pj_strerror(status, errmsg, sizeof(errmsg));
printf("Not RTP packet, skipping packet: %s\n", errmsg);
continue;
}
/* Decrypt SRTP */
#if PJMEDIA_HAS_SRTP
if (app.srtp) {
int len = (int)sz;
status = pjmedia_transport_srtp_decrypt_pkt(app.srtp, PJ_TRUE,
buf, &len);
if (status != PJ_SUCCESS) {
char errmsg[PJ_ERR_MSG_SIZE];
pj_strerror(status, errmsg, sizeof(errmsg));
printf("SRTP packet decryption failed, skipping packet: %s\n",
errmsg);
continue;
}
sz = len;
/* Decode RTP packet again */
status = pjmedia_rtp_decode_rtp(&app.rtp_sess, buf, (int)sz, &r,
&p, payload_size);
if (status != PJ_SUCCESS) {
char errmsg[PJ_ERR_MSG_SIZE];
pj_strerror(status, errmsg, sizeof(errmsg));
printf("Not RTP packet, skipping packet: %s\n", errmsg);
continue;
}
}
#endif
/* Update RTP session */
pjmedia_rtp_session_update2(&app.rtp_sess, r, &seq_st, PJ_FALSE);
/* Skip out-of-order packet */
if (seq_st.diff == 0) {
printf("Skipping out of order packet\n");
continue;
}
/* Skip if payload type is different */
if (check_pt && r->pt != app.pt) {
printf("Skipping RTP packet with bad payload type\n");
continue;
}
/* Skip bad packet */
if (seq_st.status.flag.bad) {
printf("Skipping bad RTP\n");
continue;
}
*rtp = (pjmedia_rtp_hdr*)r;
*payload = (pj_uint8_t*)p;
/* We have good packet */
break;
}
}
