Date: Thu, 14 Mar 2013 22:11:00 +0800 From: Marcelo Araujo <araujobsdport@gmail.com> To: "Alexander V. Chernikov" <melifaro@yandex-team.ru> Cc: ipfw@freebsd.org, Luigi Rizzo <rizzo@iet.unipi.it> Subject: Re: [patch] setting/matching DSCP with ipfw Message-ID: <CAOfEmZiMx90rxCb3v_R5SwEfxo%2BSc9Y7oGMRN693g6UkaGWxMg@mail.gmail.com> In-Reply-To: <5141D50A.4070702@yandex-team.ru> References: <5141D50A.4070702@yandex-team.ru>
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2013/3/14 Alexander V. Chernikov <melifaro@yandex-team.ru> > Hello list! > > This is the obvious thing which should be done at least 5 years ago. > There are several PRs like kern/102471 and kern/121122 with similar > functionality. > > Given patch adds setting DSCP support (O_SETDSCP) which works for both > IPv4 and IPv6 packets. Fast checksum recalculation (RFC 1624) is done in > former case. Dscp can be specified by name (AFXY, CSX, BE, EF), by value > (0..63) or via tablearg. > > Matching DSCP is done via another opcode (O_DSCP) which accepts several > classes at once (af11,af22,be). Classes are stored in bitmask (2 u32 > words). > > (Btw, current O_TOS can be modified to transparently match single DSCP > point, probably later on..) > > Example: > 00050 675 37800 setdscp ef ip from any to 2a02:978:11::/64 dscp be > ipfw add 100 count ip from any to any dscp af11,cs3 > 00100 count ip from any to any dscp af11,cs3 > > I'm planning to commit updated patch (docs, some style(9)) on Mon 18 if > there are no objections. > > Hello, Great that you will take care of those PR, a lot of people want it a long time ago. By the way, a long time ago, I tried to create a new entry called as "modip" and there would concentrated everything related with QoS. Something such like the examples below: *ipfw add 10 modip tos:lowdelay ip from any to any ipfw add 11 modip dscp:af14 ip from any to any * *ipfw add 12 modip ippre:flash ip from any to any* Also, there are some discussion around "modip" you can google it. Here is some patches, also the modip implementation: http://people.freebsd.org/~araujo/ipfw_patchs/ Best Regards, -- Marcelo Araujo araujo@FreeBSD.org
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