On Thu, Jul 15, 2010 at 05:22:10PM +0200, Patrick McHardy wrote: > Am 15.07.2010 13:52, schrieb Michael S. Tsirkin: > > This adds a `CHECKSUM' target, which can be used in the iptables mangle > > table. > > > > You can use this target to compute and fill in the checksum in > > a packet that lacks a checksum. This is particularly useful, > > if you need to work around old applications such as dhcp clients, > > that do not work well with checksum offloads, but don't want to > > disable checksum offload in your device. > > > > The problem happens in the field with virtualized applications. > > For reference, see Red Hat bz 605555, as well as > > http://www.spinics.net/lists/kvm/msg37660.html > > > > Typical expected use (helps old dhclient binary running in a VM): > > iptables -A POSTROUTING -t mangle -p udp --dport bootpc \ > > -j CHECKSUM --checksum-fill > > > > Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxx> > > Includes fixes by Jan Engelhardt <jengelh@xxxxxxxxxx> > > Applied, thanks Michael. I forgot to export the header. And once I added it, I got warning on header_check, so here's a fixup. Sorry about the noise. netfilter: correct CHECKSUM header and export it Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxx> -- diff --git a/include/linux/netfilter/Kbuild b/include/linux/netfilter/Kbuild index 48767cd..0c3098f 100644 --- a/include/linux/netfilter/Kbuild +++ b/include/linux/netfilter/Kbuild @@ -3,6 +3,7 @@ header-y += nf_conntrack_tuple_common.h header-y += nfnetlink_conntrack.h header-y += nfnetlink_log.h header-y += nfnetlink_queue.h +header-y += xt_CHECKSUM.h header-y += xt_CLASSIFY.h header-y += xt_CONNMARK.h header-y += xt_CONNSECMARK.h diff --git a/include/linux/netfilter/xt_CHECKSUM.h b/include/linux/netfilter/xt_CHECKSUM.h index 3b4fb77..9a2e466 100644 --- a/include/linux/netfilter/xt_CHECKSUM.h +++ b/include/linux/netfilter/xt_CHECKSUM.h @@ -6,8 +6,10 @@ * * This software is distributed under GNU GPL v2, 1991 */ -#ifndef _IPT_CHECKSUM_TARGET_H -#define _IPT_CHECKSUM_TARGET_H +#ifndef _XT_CHECKSUM_TARGET_H +#define _XT_CHECKSUM_TARGET_H + +#include <linux/types.h> #define XT_CHECKSUM_OP_FILL 0x01 /* fill in checksum in IP header */ @@ -15,4 +17,4 @@ struct xt_CHECKSUM_info { __u8 operation; /* bitset of operations */ }; -#endif /* _IPT_CHECKSUM_TARGET_H */ +#endif /* _XT_CHECKSUM_TARGET_H */ -- To unsubscribe from this list: send the line "unsubscribe netfilter" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
