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853a14ba46
This command could be useful to inc/dec fields.
For example, to forward any TCP packet and decrease its TTL:
$ tc filter add dev enp0s9 protocol ip parent ffff: \
flower ip_proto tcp \
action pedit munge ip ttl add 0xff pipe \
action mirred egress redirect dev veth0
In the example above, adding 0xff to this u8 field is actually
decreasing it by one, since the operation is masked.
Signed-off-by: Amir Vadai <amir@vadai.me>
Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
66 lines
1.6 KiB
C
66 lines
1.6 KiB
C
#ifndef __LINUX_TC_PED_H
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#define __LINUX_TC_PED_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_PEDIT 7
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enum {
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TCA_PEDIT_UNSPEC,
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TCA_PEDIT_TM,
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TCA_PEDIT_PARMS,
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TCA_PEDIT_PAD,
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TCA_PEDIT_PARMS_EX,
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TCA_PEDIT_KEYS_EX,
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TCA_PEDIT_KEY_EX,
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__TCA_PEDIT_MAX
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};
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#define TCA_PEDIT_MAX (__TCA_PEDIT_MAX - 1)
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enum {
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TCA_PEDIT_KEY_EX_HTYPE = 1,
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TCA_PEDIT_KEY_EX_CMD = 2,
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__TCA_PEDIT_KEY_EX_MAX
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};
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#define TCA_PEDIT_KEY_EX_MAX (__TCA_PEDIT_KEY_EX_MAX - 1)
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/* TCA_PEDIT_KEY_EX_HDR_TYPE_NETWROK is a special case for legacy users. It
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* means no specific header type - offset is relative to the network layer
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*/
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enum pedit_header_type {
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TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK = 0,
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TCA_PEDIT_KEY_EX_HDR_TYPE_ETH = 1,
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TCA_PEDIT_KEY_EX_HDR_TYPE_IP4 = 2,
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TCA_PEDIT_KEY_EX_HDR_TYPE_IP6 = 3,
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TCA_PEDIT_KEY_EX_HDR_TYPE_TCP = 4,
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TCA_PEDIT_KEY_EX_HDR_TYPE_UDP = 5,
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__PEDIT_HDR_TYPE_MAX,
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};
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#define TCA_PEDIT_HDR_TYPE_MAX (__PEDIT_HDR_TYPE_MAX - 1)
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enum pedit_cmd {
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TCA_PEDIT_KEY_EX_CMD_SET = 0,
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TCA_PEDIT_KEY_EX_CMD_ADD = 1,
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__PEDIT_CMD_MAX,
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};
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#define TCA_PEDIT_CMD_MAX (__PEDIT_CMD_MAX - 1)
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struct tc_pedit_key {
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__u32 mask; /* AND */
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__u32 val; /*XOR */
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__u32 off; /*offset */
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__u32 at;
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__u32 offmask;
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__u32 shift;
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};
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struct tc_pedit_sel {
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tc_gen;
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unsigned char nkeys;
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unsigned char flags;
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struct tc_pedit_key keys[0];
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};
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#define tc_pedit tc_pedit_sel
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#endif
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