tc/p_eth.c

   1 /*
   2  * m_pedit_eth.c        packet editor: ETH 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_eth(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_ETH;
  41
  42         if (strcmp(*argv, "type") == 0) {
  43                 NEXT_ARG();
  44                 tkey->off = 12;
  45                 res = parse_cmd(&argc, &argv, 2, TU32, RU16, sel, tkey);
  46                 goto done;
  47         }
  48
  49         if (strcmp(*argv, "dst") == 0) {
  50                 NEXT_ARG();
  51                 tkey->off = 0;
  52                 res = parse_cmd(&argc, &argv, 6, TMAC, RU32, sel, tkey);
  53                 goto done;
  54         }
  55
  56         if (strcmp(*argv, "src") == 0) {
  57                 NEXT_ARG();
  58                 tkey->off = 6;
  59                 res = parse_cmd(&argc, &argv, 6, TMAC, RU32, sel, tkey);
  60                 goto done;
  61         }
  62
  63         return -1;
  64
  65 done:
  66         *argc_p = argc;
  67         *argv_p = argv;
  68         return res;
  69 }
  70
  71 struct m_pedit_util p_pedit_eth = {
  72         NULL,
  73         "eth",
  74         parse_eth,
  75 };