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7c71a40cbd
Utilize the extended pedit netlink to set an offset relative to a
specific header type. Old netlink only enabled the user to set
approximated offset relative to the IPv4 header.
To use this extended functionality need to use the 'ex' keyword after
'pedit' and before any 'munge'.
e.g:
$ tc filter add dev ens9 protocol ip parent ffff: \
flower \
ip_proto udp \
dst_port 80 \
action pedit ex munge \
ip dst set 1.1.1.1 \
pipe \
action mirred egress redirect dev veth0
Signed-off-by: Amir Vadai <amir@vadai.me>
63 lines
1.1 KiB
C
63 lines
1.1 KiB
C
/*
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* m_pedit_icmp.c packet editor: ICMP header
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*
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* This program is free software; you can distribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* Authors: J Hadi Salim (hadi@cyberus.ca)
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <syslog.h>
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#include <fcntl.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <string.h>
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#include "utils.h"
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#include "tc_util.h"
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#include "m_pedit.h"
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static int
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parse_icmp(int *argc_p, char ***argv_p,
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struct m_pedit_sel *sel, struct m_pedit_key *tkey)
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{
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int res = -1;
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#if 0
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int argc = *argc_p;
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char **argv = *argv_p;
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if (argc < 2)
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return -1;
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if (strcmp(*argv, "type") == 0) {
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NEXT_ARG();
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res = parse_u8(&argc, &argv, 0);
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goto done;
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}
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if (strcmp(*argv, "code") == 0) {
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NEXT_ARG();
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res = parse_u8(&argc, &argv, 1);
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goto done;
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}
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return -1;
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done:
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*argc_p = argc;
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*argv_p = argv;
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#endif
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return res;
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}
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struct m_pedit_util p_pedit_icmp = {
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NULL,
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"icmp",
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parse_icmp,
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};
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