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[lwip-users] Data packets splitting on odd boundaries -> causes exceptio
From: |
Michael Anburaj |
Subject: |
[lwip-users] Data packets splitting on odd boundaries -> causes exception |
Date: |
Wed, 19 Feb 2003 01:18:11 -0800 (PST) |
Hi,
I guess within the LwIP stack when large data packets
(HTTP packets) are sent in, they get split into tiny
packets & then get sent out. The console debug output
what I got indicates that the splitting could happen
on odd byte boundaries. Whereas the lwip_chksum()
routine in inet.c file assumes the pbuf payload
pointer address to be aligned on a half-word (16bit
address) boundary.
Console output clipping:
-----------------------
inet_chksum_pseudo(): checksumming pbuf 8014fa1c (has
next 0)
PBuf Flags: 0001
PBuf Ref Cnt: 0001
PBuf Payload ptr: 80118513
>[3e] <[3c] /[2f] B[42] O[4f] D[44] Y[59] >[3e] <[3c]
/[2f] h[68] t[74] m[6d] l[6c] >[3e] [00]
lwip_chksum(80118513, 16)
!!! Exception context !!!
BADVADDR: 0x80118513
CAUSE: 0x00808410
EPC: 0x8010ab5c
ERROREPC: 0x80102eec
DEL exception !!!
Please reply to me ASAP.
Thanks to Jani Monoses & Kieran Mansley for their
quick responses.
Thanks a lot,
-Mike.
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- [lwip-users] Data packets splitting on odd boundaries -> causes exception,
Michael Anburaj <=
- Re: [lwip-users] Data packets splitting on odd boundaries -> causes exception, Jani Monoses, 2003/02/19
- Re: [lwip-users] Data packets splitting on odd boundaries -> causes exception, Michael Anburaj, 2003/02/19
- Re: [lwip-users] Data packets splitting on odd boundaries -> causes exception, Jani Monoses, 2003/02/19
- Re: [lwip-users] Data packets splitting on odd boundaries -> causes exception, Michael Anburaj, 2003/02/20
- Re: [lwip-users] Data packets splitting on odd boundaries -> causes exception, Jani Monoses, 2003/02/20
- Re: [lwip-users] Data packets splitting on odd boundaries -> causes exception, Michael Anburaj, 2003/02/20
- Re: [lwip-users] Data packets splitting on odd boundaries -> causes exception, Robert, 2003/02/20
- Re: [lwip-users] Data packets splitting on odd boundaries -> causes exception, Michael Anburaj, 2003/02/24
- [lwip-users] Important issue!!! Data packet split on odd boundaries -> causes exception, Michael Anburaj, 2003/02/28
- Re: [lwip-users] Important issue!!! Data packet split on odd boundaries -> causes exception, Jani Monoses, 2003/02/28