1 /*
2 * p_ip6.c packet editor: IPV6 header
3 *
4 * This program is free software; you can distribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 *
9 * Authors: Amir Vadai <amir@vadai.me>
10 *
11 */
12
13 #include <stdio.h>
14 #include <stdlib.h>
15 #include <unistd.h>
16 #include <syslog.h>
17 #include <fcntl.h>
18 #include <sys/socket.h>
19 #include <netinet/in.h>
20 #include <arpa/inet.h>
21 #include <string.h>
22 #include "utils.h"
23 #include "tc_util.h"
24 #include "m_pedit.h"
25
26 static int
parse_ip6(int * argc_p,char *** argv_p,struct m_pedit_sel * sel,struct m_pedit_key * tkey)27 parse_ip6(int *argc_p, char ***argv_p,
28 struct m_pedit_sel *sel, struct m_pedit_key *tkey)
29 {
30 int res = -1;
31 int argc = *argc_p;
32 char **argv = *argv_p;
33
34 if (argc < 2)
35 return -1;
36
37 if (!sel->extended)
38 return -1;
39
40 tkey->htype = TCA_PEDIT_KEY_EX_HDR_TYPE_IP6;
41
42 if (strcmp(*argv, "src") == 0) {
43 NEXT_ARG();
44 tkey->off = 8;
45 res = parse_cmd(&argc, &argv, 16, TIPV6, RU32, sel, tkey);
46 goto done;
47 }
48 if (strcmp(*argv, "dst") == 0) {
49 NEXT_ARG();
50 tkey->off = 24;
51 res = parse_cmd(&argc, &argv, 16, TIPV6, RU32, sel, tkey);
52 goto done;
53 }
54 if (strcmp(*argv, "flow_lbl") == 0) {
55 NEXT_ARG();
56 tkey->off = 0;
57 res = parse_cmd(&argc, &argv, 4, TU32, 0x0007ffff, sel, tkey);
58 goto done;
59 }
60 if (strcmp(*argv, "payload_len") == 0) {
61 NEXT_ARG();
62 tkey->off = 4;
63 res = parse_cmd(&argc, &argv, 2, TU32, RU16, sel, tkey);
64 goto done;
65 }
66 if (strcmp(*argv, "nexthdr") == 0) {
67 NEXT_ARG();
68 tkey->off = 6;
69 res = parse_cmd(&argc, &argv, 1, TU32, RU8, sel, tkey);
70 goto done;
71 }
72 if (strcmp(*argv, "hoplimit") == 0) {
73 NEXT_ARG();
74 tkey->off = 7;
75 res = parse_cmd(&argc, &argv, 1, TU32, RU8, sel, tkey);
76 goto done;
77 }
78
79 return -1;
80
81 done:
82 *argc_p = argc;
83 *argv_p = argv;
84 return res;
85 }
86
87 struct m_pedit_util p_pedit_ip6 = {
88 NULL,
89 "ipv6",
90 parse_ip6,
91 };
92