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https://git.proxmox.com/git/mirror_iproute2
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2c6eb12ab8
For example, forward tcp traffic destined to port 80 to veth0 and set
tcp port to 8080:
$ tc filter add dev enp0s9 protocol ip parent ffff: \
flower \
ip_proto tcp \
dst_port 80 \
action pedit ex munge \
tcp dport set 8080 \
action mirred egress \
redirect dev veth0
Signed-off-by: Amir Vadai <amir@vadai.me>
75 lines
1.4 KiB
C
75 lines
1.4 KiB
C
/*
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* m_pedit_tcp.c packet editor: TCP 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_tcp(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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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 (!sel->extended)
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return -1;
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tkey->htype = TCA_PEDIT_KEY_EX_HDR_TYPE_TCP;
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if (strcmp(*argv, "sport") == 0) {
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NEXT_ARG();
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tkey->off = 0;
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res = parse_cmd(&argc, &argv, 2, TU32, RU16, sel, tkey);
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goto done;
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}
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if (strcmp(*argv, "dport") == 0) {
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NEXT_ARG();
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tkey->off = 2;
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res = parse_cmd(&argc, &argv, 2, TU32, RU16, sel, tkey);
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goto done;
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}
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if (strcmp(*argv, "flags") == 0) {
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NEXT_ARG();
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tkey->off = 13;
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res = parse_cmd(&argc, &argv, 1, TU32, RU8, sel, tkey);
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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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return res;
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}
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struct m_pedit_util p_pedit_tcp = {
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NULL,
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"tcp",
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parse_tcp,
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};
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