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[lwip-devel] [bug #37969] SYN packet dropped as short packet in tcp_inpu

From: Simon Goldschmidt
Subject: [lwip-devel] [bug #37969] SYN packet dropped as short packet in tcp_input function
Date: Fri, 11 Jan 2013 21:19:40 +0000
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_6_8) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.101 Safari/537.11

Update of bug #37969 (project lwip):

                  Status:               Need Info => Confirmed              
             Assigned to:                    None => goldsimon              
         Planned Release:                         => 1.5.0                  
            lwIP version:                   1.4.0 => git head               


Follow-up Comment #3:

Thanks for the info. I've tested it with "PBUF_POOL_BUFSIZE 64" and also got
no connection.

lwIP makes the assumption that all IP/TCP/UDP headers must fit into the first
pbuf. With modern TCP implementations and a pbuf size of 64 bytes, this is
obviously not the case (since many TCP options can make the TCP header quite
big). I guess we'll have to fix that...

As a workaround, you could use "PBUF_POOL_BUFSIZE 128"...


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