Date: Tue, 16 Nov 1999 09:22:28 -0500 (EST) From: Garrett Wollman <wollman@khavrinen.lcs.mit.edu> To: Bruce Evans <bde@zeta.org.au> Cc: Pierre Beyssac <beyssac@enst.fr>, Garrett Wollman <wollman@khavrinen.lcs.mit.edu>, Sheldon Hearn <sheldonh@uunet.co.za>, freebsd-current@FreeBSD.ORG Subject: Re: egcs -O breaks ping.c:in_cksum() Message-ID: <199911161422.JAA10973@khavrinen.lcs.mit.edu> In-Reply-To: <Pine.BSF.4.10.9911161448210.780-100000@alphplex.bde.org> References: <19991115194357.T28348@enst.fr> <Pine.BSF.4.10.9911161448210.780-100000@alphplex.bde.org>
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<<On Tue, 16 Nov 1999 15:17:43 +1100 (EST), Bruce Evans <bde@zeta.org.au> said: > Perhaps the above should be written as: > sum += ntohs(*(u_char *)w << 8); > to avoid the undefined union access (answer.us). No. The IP checksum is defined in a manner which is endian-independent. Adding calls to ntohs() would only confuse matters further. -GAWollman -- Garrett A. Wollman | O Siem / We are all family / O Siem / We're all the same wollman@lcs.mit.edu | O Siem / The fires of freedom Opinions not those of| Dance in the burning flame MIT, LCS, CRS, or NSA| - Susan Aglukark and Chad Irschick To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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