tc/p_ip6.c

   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 <fcntl.h>
  17 #include <sys/socket.h>
  18 #include <netinet/in.h>
  19 #include <arpa/inet.h>
  20 #include <string.h>
  21 #include "utils.h"
  22 #include "tc_util.h"
  23 #include "m_pedit.h"
  24
  25 static int
  26 parse_ip6(int *argc_p, char ***argv_p,
  27           struct m_pedit_sel *sel, struct m_pedit_key *tkey)
  28 {
  29         int res = -1;
  30         int argc = *argc_p;
  31         char **argv = *argv_p;
  32
  33         if (argc < 2)
  34                 return -1;
  35
  36         if (!sel->extended)
  37                 return -1;
  38
  39         tkey->htype = TCA_PEDIT_KEY_EX_HDR_TYPE_IP6;
  40
  41         if (strcmp(*argv, "src") == 0) {
  42                 NEXT_ARG();
  43                 tkey->off = 8;
  44                 res = parse_cmd(&argc, &argv, 16, TIPV6, RU32, sel, tkey);
  45                 goto done;
  46         }
  47         if (strcmp(*argv, "dst") == 0) {
  48                 NEXT_ARG();
  49                 tkey->off = 24;
  50                 res = parse_cmd(&argc, &argv, 16, TIPV6, RU32, sel, tkey);
  51                 goto done;
  52         }
  53         if (strcmp(*argv, "flow_lbl") == 0) {
  54                 NEXT_ARG();
  55                 tkey->off = 0;
  56                 res = parse_cmd(&argc, &argv, 4, TU32, 0x0007ffff, sel, tkey);
  57                 goto done;
  58         }
  59         if (strcmp(*argv, "payload_len") == 0) {
  60                 NEXT_ARG();
  61                 tkey->off = 4;
  62                 res = parse_cmd(&argc, &argv, 2, TU32, RU16, sel, tkey);
  63                 goto done;
  64         }
  65         if (strcmp(*argv, "nexthdr") == 0) {
  66                 NEXT_ARG();
  67                 tkey->off = 6;
  68                 res = parse_cmd(&argc, &argv, 1, TU32, RU8, sel, tkey);
  69                 goto done;
  70         }
  71         if (strcmp(*argv, "hoplimit") == 0) {
  72                 NEXT_ARG();
  73                 tkey->off = 7;
  74                 res = parse_cmd(&argc, &argv, 1, TU32, RU8, sel, tkey);
  75                 goto done;
  76         }
  77
  78         return -1;
  79
  80 done:
  81         *argc_p = argc;
  82         *argv_p = argv;
  83         return res;
  84 }
  85
  86 struct m_pedit_util p_pedit_ip6 = {
  87         .id = "ipv6",
  88         .parse_peopt = parse_ip6,
  89 };