No subject
Sun Jul 12 01:37:59 PDT 2009
Packets starts after the getting the Play Response from the Server.
But I observed in Ethereal trace some RTP packets are captured after getting
the SETUP (RTSP)response packet. From client to server.
The Testing scenario I have taken is
At 10.0.1.253(local Server IP) I have the rtsp stream(contains both Audio
and video), I played this rtsp Stream from 10.0.2.195(desktop sys) in Real
Player and captured the packets using ethereal trace.
After setup response from 10.0.1.253 to 10.0.2.195, I got the RTP packets
from 10.0.2.195(Desktop) to 10.0.1.253 without any payload (malformed RTP
Packet).
After Play Response from 10.0.1.253 I got RTP packets all are from
10.0.1.253 to 10.0.2.195.
My doubt is what the RTP packets from client to server represents. Because
in combo RTCP packet the SSRC of receiver report(RR Packet type) is the SSRC
of these Packets.
Thanks in Advance.
Thanks and Regds,
Prasanna Kumar.N,
Software Engineer,
R&D Networks,
Mob:9000016358
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<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Dear All,<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>I am developing the Streaming packet sniffing =
application;
right now I implemented RTSP protocol packet =
sniffing.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>From some documents and tutorials I came to know that =
the
RTP and RTCP Packets starts after the getting the Play Response from the
Server.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>But I observed in Ethereal trace some RTP packets are
captured after getting the SETUP (RTSP)response packet. From client to =
server.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>The Testing scenario I have taken =
is<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>At 10.0.1.253(local Server IP) I have the rtsp =
stream(contains
both Audio and video), I played this rtsp Stream from 10.0.2.195(desktop =
sys)
in Real Player and captured the packets using ethereal =
trace.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>After setup response from 10.0.1.253 to 10.0.2.195, I =
got
the RTP packets from 10.0.2.195(Desktop) to 10.0.1.253 without any =
payload (malformed
RTP Packet). <o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>After Play Response from 10.0.1.253 I got RTP packets =
all
are from 10.0.1.253 to 10.0.2.195.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>My doubt is what the RTP packets from client to =
server
represents. Because in combo RTCP packet the SSRC of receiver report(RR =
Packet
type) is the SSRC of these Packets.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Thanks in Advance.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Thanks and Regds,<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Prasanna Kumar.N,<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'>Software Engineer,<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'>R&D Networks,<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'>Mob:9000016358<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'> <o:p></o:p></span></font></p>
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<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
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to
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email
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the
company. Finally, the recipient should check this email and any =
attachments for
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caused
by any attachment with this email. <br>
<br>
IMImobile, Plot No:770, Road No : 44, Jubilee Hills, <st1:place =
w:st=3D"on"><st1:City
w:st=3D"on">Hyderabad</st1:City>, <st1:country-region =
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