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 <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
  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 };