eb4d406545
net/sched: add ACT_CSUM action to update packets checksums ACT_CSUM can be called just after ACT_PEDIT in order to re-compute some altered checksums in IPv4 and IPv6 packets. The following checksums are supported by this patch: - IPv4: IPv4 header, ICMP, IGMP, TCP, UDP & UDPLite - IPv6: ICMPv6, TCP, UDP & UDPLite It's possible to request in the same action to update different kind of checksums, if the packets flow mix TCP, UDP and UDPLite, ... An example of usage is done in the associated iproute2 patch. Version 3 changes: - remove useless goto instructions - improve IPv6 hop options decoding Version 2 changes: - coding style correction - remove useless arguments of some functions - use stack in tcf_csum_dump() - add tcf_csum_skb_nextlayer() to factor code Signed-off-by: Gregoire Baron <baronchon@n7mm.org> Acked-by: jamal <hadi@cyberus.ca> Signed-off-by: David S. Miller <davem@davemloft.net>
33 lines
554 B
C
33 lines
554 B
C
#ifndef __LINUX_TC_CSUM_H
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#define __LINUX_TC_CSUM_H
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#include <linux/types.h>
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#include <linux/pkt_cls.h>
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#define TCA_ACT_CSUM 16
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enum {
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TCA_CSUM_UNSPEC,
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TCA_CSUM_PARMS,
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TCA_CSUM_TM,
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__TCA_CSUM_MAX
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};
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#define TCA_CSUM_MAX (__TCA_CSUM_MAX - 1)
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enum {
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TCA_CSUM_UPDATE_FLAG_IPV4HDR = 1,
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TCA_CSUM_UPDATE_FLAG_ICMP = 2,
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TCA_CSUM_UPDATE_FLAG_IGMP = 4,
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TCA_CSUM_UPDATE_FLAG_TCP = 8,
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TCA_CSUM_UPDATE_FLAG_UDP = 16,
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TCA_CSUM_UPDATE_FLAG_UDPLITE = 32
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};
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struct tc_csum {
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tc_gen;
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__u32 update_flags;
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};
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#endif /* __LINUX_TC_CSUM_H */
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