I am not sure if this is the correct mailing list for my question or
not. If it isn't could someone please direct me to the correct one.
Here's what I am doing and the problem emanating from it:
I wanted to keep a track of tcp packets received from the network, so I
started keeping a count of that by incrementing pkts_recv variable in
the function tcp_recv_established in usr/src/linux/net/ipv4/tcp_input.c
, everytime I receive a packet. The structure(tcp_opt) that contains
pkts_recv variable is defined in usr/src/linux/include/net/sock.h.
The problem that I am facing is that this count(pkts_recv) increments by
one each time I receive a tcp packet, but then something goes wrong and
the next time it receives a packet it(pkts_recv) increments by some
random quantity (like 36,3, 55 ...). But after this incrementation by
the random value, the next time it receives a packet it increments by 1
again (instead of the random value)! And there are several instances
where the incrementation takes place by the random quantity (3-7 times
when 1000 packets are received). I have checked in the source and the
only place I am incrementing the count is in tcp_recv_established function.
Does anyone have views on this quirky behavior?
Any help would be greatly appreciated.
Thanks,
Abhinav.
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