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Implemented Zoom/Teams stream type detection

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This commit is contained in:
Luca Deri 2023-06-14 23:44:57 +02:00
parent 66bee475ae
commit d0609ea601
9 changed files with 121 additions and 46 deletions
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10
src/lib/protocols/rtp.c
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@ -105,7 +105,8 @@ PACK_ON struct zoom_media_encapsulation {
#define ZOOM_PORT 8801
static u_int8_t isZoom(u_int16_t sport, u_int16_t dport,
static u_int8_t isZoom(struct ndpi_flow_struct *flow,
u_int16_t sport, u_int16_t dport,
const u_int8_t *payload, const u_int16_t payloadLen,
u_int8_t *is_rtp, u_int8_t *zoom_stream_type,
u_int16_t *payload_offset) {
@ -118,7 +119,7 @@ static u_int8_t isZoom(u_int16_t sport, u_int16_t dport,
if((sport == ZOOM_PORT) || (dport == ZOOM_PORT)) {
struct zoom_sfu_encapsulation *enc = (struct zoom_sfu_encapsulation*)payload;
/* traceEvent(TRACE_NORMAL, "==> %u <-> %u [type: %u]", sport, dport, enc->sfu_type); */
/* printf("==> %u <-> %u [type: %u]\n", sport, dport, enc->sfu_type); */
if((enc->sfu_type >= 3) && (enc->sfu_type <= 5)) {
struct zoom_media_encapsulation *enc = (struct zoom_media_encapsulation*)(&payload[sizeof(struct zoom_sfu_encapsulation)]);
@ -130,16 +131,19 @@ static u_int8_t isZoom(u_int16_t sport, u_int16_t dport,
case 30: /* Screen Share */
*is_rtp = 0;
*payload_offset = 27;
flow->zoom.flow_type = ndpi_multimedia_screen_sharing_flow;
break;
case 15: /* Audio */
*is_rtp = 1;
*payload_offset = 27;
flow->zoom.flow_type = ndpi_multimedia_audio_flow;
break;
case 16: /* Video */
*is_rtp = 1;
*payload_offset = 32;
flow->zoom.flow_type = ndpi_multimedia_video_flow;
break;
case 33: /* RTCP */
@ -181,7 +185,7 @@ static void ndpi_rtp_search(struct ndpi_detection_module_struct *ndpi_struct,
return;
}
if(isZoom(s_port, d_port, payload, payload_len,
if(isZoom(flow, s_port, d_port, payload, payload_len,
&is_rtp, &zoom_stream_type, &payload_offset)) {
if(payload_offset < payload_len) {
/*