Messages in this thread | | | Subject | Re: strange RST packets sent by Linux | From | Andi Kleen <> | Date | 12 Dec 1997 05:17:57 +0100 |
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Hans-Joachim Zimmer <hazi@stud.uni-sb.de> writes:
> Hello, > > about a week ago I posted a question about a TCP Problem that arises > when I try to print some documents using a Linux (2.0.28 or 2.0.30) > spool server and a HP Laserjet 5SiMX equiped with a JetDirect ether- > net adapter (Newsgroups: comp.os.linux.networking, comp.os.linux. > development.system, de.comp.os.linux.networking). Linux sends RST- > packets that cancel the connection. I could not find any reason for > this behaviour. > Now I have been able to locate the line in the kernel source that > generates the reset. It is line nr.2082 in the file net/ipv4/tcp_input.c. > It is possible to eliminate this function call by defining the pre- > processor macro TCP_DONT_RST_SHUTDOWN (c.f. line nr.2045). With this > small change in the kernel source printing seems to work fine now. > Unfortunately I dont know all the implications that arise if I eliminate > this piece of code (lines 2045-2096 in tcp_input.c). > > Does anybody know the meaning of these lines and is there a bug in > this code?
This code is OK, there is just a bug in the Linux tcp_send_fin() function (it doesn't work correctly when the remote window is zero). A solution is worked on (2.1 suffers from the same problem)
-A.
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