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Re: [lwip-users] no PCB match found at simultaneously TCP connections
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From: |
twagner |
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Subject: |
Re: [lwip-users] no PCB match found at simultaneously TCP connections |
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Date: |
Mon, 19 Feb 2018 05:57:27 -0700 (MST) |
I have also a webserver running.
I can see that the used pcb mem goes back if the Client (not the MCU) closes
the connection (modbus),
but if the server (the MCU) closes the connection the used pcbs doesn't go
back (webserver).
If i have only the mobus connection in use the maximum of the pcbs is only 2
(similar to the real connections).
Strange is also that the destination port of the received message seems to
be wrong.
I debugged the tcp_input function a bit and i get a wrong destination Port
in the tcphdr struct:
tcphdr error (mb):
src u16_t 7378
dest u16_t 62977
seqno u32_t 752975085
ackno u32_t 2805334016
_hdrlen_rsvd_flags u16_t 6224
wnd u16_t 28151
chksum u16_t 48586
urgp u16_t 0
tcphdr error (mb):
src u16_t 8658
dest u16_t 62977
seqno u32_t 575249432
ackno u32_t 1732313088
_hdrlen_rsvd_flags u16_t 6224
wnd u16_t 1017
chksum u16_t 23595
urgp u16_t 0
tcphdr error (mb):
src u16_t 10450
dest u16_t 62977
seqno u32_t 601707332
ackno u32_t 929038336
_hdrlen_rsvd_flags u16_t 6224
wnd u16_t 62709
chksum u16_t 10063
urgp u16_t 0
tcphdr error (web):
src u16_t 4307
dest u16_t 20480
seqno u32_t 1664538112
ackno u32_t 2808348672
_hdrlen_rsvd_flags u16_t 4176
wnd u16_t 61690
chksum u16_t 42544
urgp u16_t 0
tcphdr error (web):
src u16_t 31443
dest u16_t 20480
seqno u32_t 518157564
ackno u32_t 2617311488
_hdrlen_rsvd_flags u16_t 4176
wnd u16_t 61690
chksum u16_t 60395
urgp u16_t 0
tcphdr correct (mb):
src u16_t 53789
dest u16_t 502
seqno u32_t 3167854155
ackno u32_t 62947
_hdrlen_rsvd_flags u16_t 6224
wnd u16_t 63921
chksum u16_t 18806
urgp u16_t 0
--
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