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/*
* p_ip.c packet editor: IPV4 header
*
* This program is free software; you can distribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* Authors: J Hadi Salim (hadi@cyberus.ca)
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#include "utils.h"
#include "tc_util.h"
#include "m_pedit.h"
static int
parse_ip(int *argc_p, char ***argv_p,
struct m_pedit_sel *sel, struct m_pedit_key *tkey)
{
int res = -1;
int argc = *argc_p;
char **argv = *argv_p;
if (argc < 2)
return -1;
tkey->htype = sel->extended ?
TCA_PEDIT_KEY_EX_HDR_TYPE_IP4 :
TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK;
if (strcmp(*argv, "src") == 0) {
NEXT_ARG();
tkey->off = 12;
res = parse_cmd(&argc, &argv, 4, TIPV4, RU32, sel, tkey, 0);
goto done;
}
if (strcmp(*argv, "dst") == 0) {
NEXT_ARG();
tkey->off = 16;
res = parse_cmd(&argc, &argv, 4, TIPV4, RU32, sel, tkey, 0);
goto done;
}
/* jamal - look at these and make them either old or new
** scheme given diffserv
** don't forget the CE bit
*/
if (strcmp(*argv, "tos") == 0 || matches(*argv, "dsfield") == 0) {
NEXT_ARG();
tkey->off = 1;
res = parse_cmd(&argc, &argv, 1, TU32, RU8, sel, tkey, 0);
goto done;
}
if (strcmp(*argv, "ihl") == 0) {
NEXT_ARG();
tkey->off = 0;
res = parse_cmd(&argc, &argv, 1, TU32, 0x0f, sel, tkey, 0);
goto done;
}
if (strcmp(*argv, "ttl") == 0) {
NEXT_ARG();
tkey->off = 8;
res = parse_cmd(&argc, &argv, 1, TU32, RU8, sel, tkey, PEDIT_ALLOW_DEC);
goto done;
}
if (strcmp(*argv, "protocol") == 0) {
NEXT_ARG();
tkey->off = 9;
res = parse_cmd(&argc, &argv, 1, TU32, RU8, sel, tkey, 0);
goto done;
}
/* jamal - fix this */
if (matches(*argv, "precedence") == 0) {
NEXT_ARG();
tkey->off = 1;
res = parse_cmd(&argc, &argv, 1, TU32, RU8, sel, tkey, 0);
goto done;
}
/* jamal - validate this at some point */
if (strcmp(*argv, "nofrag") == 0) {
NEXT_ARG();
tkey->off = 6;
res = parse_cmd(&argc, &argv, 1, TU32, 0x3F, sel, tkey, 0);
goto done;
}
/* jamal - validate this at some point */
if (strcmp(*argv, "firstfrag") == 0) {
NEXT_ARG();
tkey->off = 6;
res = parse_cmd(&argc, &argv, 1, TU32, 0x1F, sel, tkey, 0);
goto done;
}
if (strcmp(*argv, "ce") == 0) {
NEXT_ARG();
tkey->off = 6;
res = parse_cmd(&argc, &argv, 1, TU32, 0x80, sel, tkey, 0);
goto done;
}
if (strcmp(*argv, "df") == 0) {
NEXT_ARG();
tkey->off = 6;
res = parse_cmd(&argc, &argv, 1, TU32, 0x40, sel, tkey, 0);
goto done;
}
if (strcmp(*argv, "mf") == 0) {
NEXT_ARG();
tkey->off = 6;
res = parse_cmd(&argc, &argv, 1, TU32, 0x20, sel, tkey, 0);
goto done;
}
if (sel->extended)
return -1; /* fields located outside IP header should be
* addressed using the relevant header type in
* extended pedit kABI
*/
if (strcmp(*argv, "dport") == 0) {
NEXT_ARG();
tkey->off = 22;
res = parse_cmd(&argc, &argv, 2, TU32, RU16, sel, tkey, 0);
goto done;
}
if (strcmp(*argv, "sport") == 0) {
NEXT_ARG();
tkey->off = 20;
res = parse_cmd(&argc, &argv, 2, TU32, RU16, sel, tkey, 0);
goto done;
}
if (strcmp(*argv, "icmp_type") == 0) {
NEXT_ARG();
tkey->off = 20;
res = parse_cmd(&argc, &argv, 1, TU32, RU8, sel, tkey, 0);
goto done;
}
if (strcmp(*argv, "icmp_code") == 0) {
NEXT_ARG();
tkey->off = 20;
res = parse_cmd(&argc, &argv, 1, TU32, RU8, sel, tkey, 0);
goto done;
}
return -1;
done:
*argc_p = argc;
*argv_p = argv;
return res;
}
struct m_pedit_util p_pedit_ip = {
.id = "ip",
.parse_peopt = parse_ip,
};
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