Hi,
I am encountering a strange scenario with my RTP Send thread. After setting
up a connection with another client from my SIP Client I start sending and
receiving RTP packets. I have no problem in receiving the packets, but the
problem is with the RTP Send thread such that after a sleep of 20ms which I
am making the RTP Send thread to sleep, after this 20ms sleep the send
thread starts again, but again the sequence number and time stamp are reset
and start again from the beginning.
I can see on netmon that my RTP Send thread is sending some packets starting
with sequence number = 1 and time stamp = 160 and after the thread starts
from sleep, it again starts sending the RTP packets starting with sequence
number = 1 and time stamp = 160.
Here is the netmon capture:
396 7.4784891 192.168.1.80 192.168.1.1 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 329899372, Seq = 1,
TimeStamp = 160 {UDP:1, IPv4:18}
397 7.4825127 192.168.1.80 192.168.1.1 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 329899372, Seq = 2,
TimeStamp = 320 {UDP:1, IPv4:18}
398 7.4859608 192.168.1.1 192.168.1.80 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 1419577456, Seq =
55420, TimeStamp = 1294160 {UDP:1, IPv4:18}
399 7.4865240 192.168.1.80 192.168.1.1 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 329899372, Seq = 3,
TimeStamp = 480 {UDP:1, IPv4:18}
400 7.5061632 192.168.1.1 192.168.1.80 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 1419577456, Seq =
55421, TimeStamp = 1294320 {UDP:1, IPv4:18}
401 7.5184904 192.168.1.80 192.168.1.1 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 329899372, Seq = 4,
TimeStamp = 640 {UDP:1, IPv4:18}
402 7.5259976 192.168.1.1 192.168.1.80 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 1419577456, Seq =
55422, TimeStamp = 1294480 {UDP:1, IPv4:18}
403 7.5270654 192.168.1.80 192.168.1.1 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 329899372, Seq = 1,
TimeStamp = 160 {UDP:1, IPv4:18}
404 7.5321877 192.168.1.80 192.168.1.1 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 329899372, Seq = 2,
TimeStamp = 320 {UDP:1, IPv4:18}
405 7.5362360 192.168.1.80 192.168.1.1 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 329899372, Seq = 3,
TimeStamp = 480 {UDP:1, IPv4:18}
406 7.5459893 192.168.1.1 192.168.1.80 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 1419577456, Seq =
55423, TimeStamp = 1294640 {UDP:1, IPv4:18}
407 7.5660443 192.168.1.1 192.168.1.80 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 1419577456, Seq =
55424, TimeStamp = 1294800 {UDP:1, IPv4:18}
408 7.5727087 192.168.1.80 192.168.1.1 UDP
UDP:SrcPort = 22334, DstPort = 12964, Length = 180 {UDP:1, IPv4:18}
409 7.5789801 192.168.1.80 192.168.1.1 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 329899372, Seq = 1,
TimeStamp = 160 {UDP:1, IPv4:18}
410 7.5830083 192.168.1.80 192.168.1.1 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 329899372, Seq = 2,
TimeStamp = 320 {UDP:1, IPv4:18}
411 7.5860037 192.168.1.1 192.168.1.80 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 1419577456, Seq =
55425, TimeStamp = 1294960 {UDP:1, IPv4:18}
412 7.6060190 192.168.1.1 192.168.1.80 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 1419577456, Seq =
55426, TimeStamp = 1295120 {UDP:1, IPv4:18}
413 7.6162093 192.168.1.80 192.168.1.1 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 329899372, Seq = 3,
TimeStamp = 480 {UDP:1, IPv4:18}
414 7.6254210 192.168.1.80 192.168.1.1 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 329899372, Seq = 1,
TimeStamp = 160 {UDP:1, IPv4:18}
415 7.6258741 192.168.1.1 192.168.1.80 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 1419577456, Seq =
55427, TimeStamp = 1295280 {UDP:1, IPv4:18}
416 7.6304875 192.168.1.80 192.168.1.1 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 329899372, Seq = 2,
TimeStamp = 320 {UDP:1, IPv4:18}
417 7.6345130 192.168.1.80 192.168.1.1 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 329899372, Seq = 3,
TimeStamp = 480 {UDP:1, IPv4:18}
418 7.6460465 192.168.1.1 192.168.1.80 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 1419577456, Seq =
55428, TimeStamp = 1295440 {UDP:1, IPv4:18}
419 7.6660144 192.168.1.1 192.168.1.80 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 1419577456, Seq =
55429, TimeStamp = 1295600 {UDP:1, IPv4:18}
420 7.6664040 192.168.1.80 192.168.1.1 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 329899372, Seq = 4,
TimeStamp = 640 {UDP:1, IPv4:18}
421 7.6760927 192.168.1.80 192.168.1.1 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 329899372, Seq = 1,
TimeStamp = 160 {UDP:1, IPv4:18}
422 7.6801471 192.168.1.80 192.168.1.1 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 329899372, Seq = 2,
TimeStamp = 320 {UDP:1, IPv4:18}
423 7.6841980 192.168.1.80 192.168.1.1 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 329899372, Seq = 3,
TimeStamp = 480 {UDP:1, IPv4:18}
424 7.6858368 192.168.1.1 192.168.1.80 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 1419577456, Seq =
55430, TimeStamp = 1295760 {UDP:1, IPv4:18}
425 7.7060118 192.168.1.1 192.168.1.80 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 1419577456, Seq =
55431, TimeStamp = 1295920 {UDP:1, IPv4:18}
426 7.7209980 192.168.1.80 192.168.1.1 UDP
UDP:SrcPort = 22334, DstPort = 12964, Length = 180 {UDP:1, IPv4:18}
427 7.7259359 192.168.1.1 192.168.1.80 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 1419577456, Seq =
55432, TimeStamp = 1296080 {UDP:1, IPv4:18}
428 7.7288774 192.168.1.80 192.168.1.1 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 329899372, Seq = 1,
TimeStamp = 160 {UDP:1, IPv4:18}
429 7.7335620 192.168.1.80 192.168.1.1 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 329899372, Seq = 2,
TimeStamp = 320 {UDP:1, IPv4:18}
430 7.7460382 192.168.1.1 192.168.1.80 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 1419577456, Seq =
55433, TimeStamp = 1296240 {UDP:1, IPv4:18}
431 7.7660654 192.168.1.1 192.168.1.80 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 1419577456, Seq =
55434, TimeStamp = 1296400 {UDP:1, IPv4:18}
432 7.7688175 192.168.1.80 192.168.1.1 UDP
UDP:SrcPort = 22334, DstPort = 12964, Length = 180 {UDP:1, IPv4:18}
433 7.7755308 192.168.1.80 192.168.1.1 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 329899372, Seq = 1,
TimeStamp = 160 {UDP:1, IPv4:18}
434 7.7795409 192.168.1.80 192.168.1.1 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 329899372, Seq = 2,
TimeStamp = 320 {UDP:1, IPv4:18}
435 7.7859224 192.168.1.1 192.168.1.80 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 1419577456, Seq =
55435, TimeStamp = 1296560 {UDP:1, IPv4:18}
436 7.8060232 192.168.1.1 192.168.1.80 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 1419577456, Seq =
55436, TimeStamp = 1296720 {UDP:1, IPv4:18}
437 7.8128543 192.168.1.80 192.168.1.1 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 329899372, Seq = 3,
TimeStamp = 480 {UDP:1, IPv4:18}
438 7.8225130 192.168.1.80 192.168.1.1 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 329899372, Seq = 1,
TimeStamp = 160 {UDP:1, IPv4:18}
439 7.8258402 192.168.1.1 192.168.1.80 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 1419577456, Seq =
55437, TimeStamp = 1296880 {UDP:1, IPv4:18}
440 7.8265628 192.168.1.80 192.168.1.1 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 329899372, Seq = 2,
TimeStamp = 320 {UDP:1, IPv4:18}
441 7.8316670 192.168.1.80 192.168.1.1 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 329899372, Seq = 3,
TimeStamp = 480 {UDP:1, IPv4:18}
442 7.8462520 192.168.1.1 192.168.1.80 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 1419577456, Seq =
55438, TimeStamp = 1297040 {UDP:1, IPv4:18}
443 7.8661544 192.168.1.1 192.168.1.80 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 1419577456, Seq =
55439, TimeStamp = 1297200 {UDP:1, IPv4:18}
444 7.8670660 192.168.1.80 192.168.1.1 UDP
UDP:SrcPort = 22334, DstPort = 12964, Length = 180 {UDP:1, IPv4:18}
445 7.8738410 192.168.1.80 192.168.1.1 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 329899372, Seq = 1,
TimeStamp = 160 {UDP:1, IPv4:18}
446 7.8786926 192.168.1.80 192.168.1.1 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 329899372, Seq = 2,
TimeStamp = 320 {UDP:1, IPv4:18}
447 7.8859087 192.168.1.1 192.168.1.80 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 1419577456, Seq =
55440, TimeStamp = 1297360 {UDP:1, IPv4:18}
448 7.9059979 192.168.1.1 192.168.1.80 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 1419577456, Seq =
55441, TimeStamp = 1297520 {UDP:1, IPv4:18}
449 7.9111579 192.168.1.80 192.168.1.1 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 329899372, Seq = 3,
TimeStamp = 480 {UDP:1, IPv4:18}
450 7.9207415 192.168.1.80 192.168.1.1 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 329899372, Seq = 1,
TimeStamp = 160 {UDP:1, IPv4:18}
451 7.9256898 192.168.1.80 192.168.1.1 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 329899372, Seq = 2,
TimeStamp = 320 {UDP:1, IPv4:18}
452 7.9263754 192.168.1.1 192.168.1.80 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 1419577456, Seq =
55442, TimeStamp = 1297680 {UDP:1, IPv4:18}
453 7.9307948 192.168.1.80 192.168.1.1 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 329899372, Seq = 3,
TimeStamp = 480 {UDP:1, IPv4:18}
454 7.9461513 192.168.1.1 192.168.1.80 RTP
RTP:PayloadType = PCMA Audio, 8000Hz [1 Channel], SSRC = 1419577456, Seq =
55443, TimeStamp = 1297840 {UDP:1, IPv4:18}
455 7.9654232 192.168.1.80 192.168.1.1 UDP
UDP:SrcPort = 22334, DstPort = 12964, Length = 180 {UDP:1, IPv4:18}
Skeleton of my pseudo code looks something like this:
*static void rtp_send_packets(send_socket, &remote_addr )
{
* /*here I assign the values for the RTP packet like version number,
payload type etc*/
/*finally send the rtp packets to the server using sento */
*
}
static void rtp_send_thread(void *arg)
{
* /*here I do all the initializations and binding stuff for sending RTP
Thread**/
while(1){
rtp_send_packets(send_socket, &remote_addr );
sleep_ms(20);
}
}
void rtp_init(void)
{
pthread_t rtp_send_th;
pthread_t rtp_recv_th;
pthread_create(&rtp_send_th, NULL, rtp_send_thread, NULL);
pthread_create(&rtp_recv_th, NULL, rtp_recv_thread, NULL);
}*
Does anybody have an idea why this is happening?
Regards
_______________________________________________
Sip-implementors mailing list
[email protected]
https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
