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[lwip-devel] [bug #52403] netconn: FIN may be sent instead of RST when T


From: Gao Qingshui
Subject: [lwip-devel] [bug #52403] netconn: FIN may be sent instead of RST when TCP netconn is closed with pending data in recv_mbox
Date: Mon, 20 Nov 2017 02:03:28 -0500 (EST)
User-agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.100 Safari/537.36

Follow-up Comment #7, bug #52403 (project lwip):

Simon´╝îthere are two cases for TCP socket which would make 'lastdata' was not
NULL. 1st, the MSG_PEEK recv/recvfrom operation mentioned previously; 2nd,
normal recv/recvfrom, but the user buffer was shorter than the data length of
first segment in recvmbox. I tested on version 1.4.1 and 2.0.3 and found both
have this issue. So what is the 'new code' in your comments? 

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