Man page - tc-csum(8)
Packages contains this manual
- rdma-monitor(8)
- devlink-rate(8)
- dcb-app(8)
- tc-prio(8)
- ip-netconf(8)
- tc-tunnel_key(8)
- tc-ets(8)
- arpd(8)
- tc-mqprio(8)
- ip-mptcp(8)
- ss(8)
- tc(8)
- vdpa(8)
- ip-tcp_metrics(8)
- rdma(8)
- devlink-region(8)
- ip(8)
- bridge(8)
- ip-link(8)
- tc-drr(8)
- genl(8)
- ip-addrlabel(8)
- ip-rule(8)
- dcb-pfc(8)
- ip-stats(8)
- tc-choke(8)
- tc-skbprio(8)
- tc-simple(8)
- tc-stab(8)
- routel(8)
- rtmon(8)
- tc-actions(8)
- ip-l2tp(8)
- tc-cgroup(8)
- tc-basic(8)
- ip-address(8)
- devlink-resource(8)
- tc-flower(8)
- rdma-link(8)
- dcb-apptrust(8)
- devlink-port(8)
- tc-route(8)
- rtstat(8)
- ip-sr(8)
- tc-red(8)
- dcb-ets(8)
- devlink-health(8)
- lnstat(8)
- tc-flow(8)
- tc-tbf(8)
- vdpa-mgmtdev(8)
- tipc-link(8)
- tc-skbedit(8)
- tipc-media(8)
- dcb-maxrate(8)
- tc-mpls(8)
- devlink(8)
- tc-sfb(8)
- ip-maddress(8)
- tc-fq(8)
- tc-pfifo(8)
- rtacct(8)
- tipc(8)
- tc-hfsc(7)
- tc-taprio(8)
- tc-nat(8)
- tc-connmark(8)
- ip-token(8)
- ip-tunnel(8)
- tipc-node(8)
- ip-nexthop(8)
- rdma-resource(8)
- ip-gue(8)
- tc-sfq(8)
- tc-htb(8)
- tc-skbmod(8)
- dcb-buffer(8)
- tipc-bearer(8)
- dcb-rewr(8)
- tc-ematch(8)
- tc-pedit(8)
- tc-police(8)
- ip-mroute(8)
- devlink-sb(8)
- dcb-dcbx(8)
- tipc-nametable(8)
- tc-fq_codel(8)
- devlink-dpipe(8)
- devlink-trap(8)
- rdma-system(8)
- ctstat(8)
- tc-sample(8)
- tc-csum(8)
- libnetlink(3)
- ip-ioam(8)
- ip-neighbour(8)
- tc-netem(8)
- tc-pfifo_fast(8)
- tc-bfifo(8)
- tc-etf(8)
- tc-cake(8)
- devlink-monitor(8)
- tipc-socket(8)
- tc-fq_pie(8)
- tc-pie(8)
- tc-u32(8)
- tc-mirred(8)
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- vdpa-dev(8)
- tc-cbs(8)
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- tc-bpf(8)
- ip-route(8)
- ip-netns(8)
- tc-ctinfo(8)
- ip-fou(8)
- ip-xfrm(8)
- tc-gate(8)
- tc-ct(8)
- tipc-peer(8)
- ip-macsec(8)
- tc-matchall(8)
- nstat(8)
- ip-monitor(8)
- rdma-dev(8)
- tc-gact(8)
- ip-vrf(8)
- ip-ntable(8)
- tc-ife(8)
- tc-vlan(8)
- rdma-statistic(8)
- dcb(8)
- devlink-lc(8)
- devlink-dev(8)
apt-get install iproute2
Manual
Checksum action in tc
NAMESYNOPSIS
DESCRIPTION
OPTIONS
EXAMPLES
SEE ALSO
NAME
csum - checksum update action
SYNOPSIS
tc ... action csum UPDATE
UPDATE := TARGET [ UPDATE ]
TARGET := { ip4h | icmp | igmp | tcp | udp | udplite | sctp | SWEETS }
SWEETS := { and | or | + }
DESCRIPTION
The csum action triggers checksum recalculation of specified packet headers. It is commonly used to fix incorrect checksums after the pedit action has modified the packet content.
OPTIONS
|
TARGET |
Specify which headers to update: IPv4 header ( ip4h ), ICMP header ( icmp ), IGMP header ( igmp ), TCP header ( tcp ), UDP header ( udp ), UDPLite header ( udplite ) or SCTP header ( sctp ). |
||
|
SWEETS |
These are merely syntactic sugar and ignored internally. |
EXAMPLES
The following performs stateless NAT for incoming packets from 192.0.2.100 to new destination 198.51.100.1. Assuming these are UDP packets, both IP and UDP checksums have to be recalculated:
# tc qdisc add
dev eth0 ingress handle ffff:
# tc filter add dev eth0 prio 1 protocol ip parent ffff:
\
|
u32 match ip src 192.0.2.100/32 flowid :1 \ |
|
|
action pedit munge ip dst set 198.51.100.1 pipe \ |
|
|
csum ip and udp |
SEE ALSO
tc (8), tc-pedit (8)