Date: Tue, 24 Aug 2004 20:19:59 +0000 From: "Christian S.J. Peron" <csjp@freebsd.org> To: Andre Oppermann <andre@freebsd.org> Cc: ipfw@freebsd.org Subject: Re: Could you have a look at kern/63961 Message-ID: <20040824201958.GA61912@freefall.freebsd.org> In-Reply-To: <412B8799.4020808@freebsd.org> References: <412B8799.4020808@freebsd.org>
next in thread | previous in thread | raw e-mail | index | archive | help
Hey Andre, I took a quick look at the PR and I dont think this is a bug. If you want to match setup packets for TCP connections it does work, but only if the connection has a PCB associated with it. For instance, outgoing setup would have a PCB associated with it, so ipfw could match on that: dev0# ipfw show 00400 1 64 count tcp from any to any dst-port 4296 setup uid csjp It should be noted that all the "setup" keyword does is set the O_TCPFLAGS opcode and set the operand to TH_SYN for SYN packets. I dont think Incoming TCP connection requests would not have a PCB associated with it, so there is no-way that ipfw can look up the credential associated with it. However the UID negation problem looks like it could be a bug either in how ipfw(8) reports the rule or how the kernel is processing it. In either case I will look into it. -- Christian S.J. Peron csjp@FreeBSD.ORG FreeBSD Committer
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20040824201958.GA61912>