Re: [lwip-users] no PCB match found at simultaneously TCP connections

[goldsimon]

twagner wrote:
>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).

Ok, so that's expected.

>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:

That's strange, but I don't see what's wrong here.

Simon

>
>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       
>
>
>
>--
>Sent from: http://lwip.100.n7.nabble.com/lwip-users-f3.html
>
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