Date: Sun, 27 Jan 2002 13:16:47 -0500 From: "Dan Langille" <dan@langille.org> To: freebsd-hackers@freebsd.org Subject: (Fwd) ip_output() does not checksum outer header Message-ID: <200201271816.g0RIGnD93743@lists.unixathome.org>
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I am forwarding this on behalf of Bruce (his DNS is borked and thus he cannot send to the lists). Please don't CC me in the replies, only Bruce. Thanks. ------- Forwarded message follows ------- Date sent: Fri, 25 Jan 2002 23:35:38 +0000 From: Bruce M Simpson <bms@spc.org> To: dan@langille.org Subject: ip_output() does not checksum outer header Dan, if you could forward this on to freebsd-net I would be most grateful. I have completed most of the code to implement GRE as a regular interface driver under 4.4-STABLE using the cloner interface. This has all worked fine in local tests. Tonight, whilst testing with a remote site, we noticed that the encapsulating IP datagram header around the GRE header does not have any header checksum. I have checked, checked and re-checked the m->m_len, m->m_pkthdr.len, m_pullup() results et al and can find nothing out of the ordinary. This is driving me mad right now, can anybody shed any light on the problem? Regards, Bruce. ------- End of forwarded message ------- -- Dan Langille The FreeBSD Diary - http://freebsddiary.org/ - practical examples To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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