tc/p_udp.c

   1 /*
   2  * m_pedit_udp.c        packet editor: UDP 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:  J Hadi Salim (hadi@cyberus.ca)
  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_udp(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_UDP;
  41
  42         if (strcmp(*argv, "sport") == 0) {
  43                 NEXT_ARG();
  44                 tkey->off = 0;
  45                 res = parse_cmd(&argc, &argv, 2, TU32, RU16, sel, tkey);
  46                 goto done;
  47         }
  48
  49         if (strcmp(*argv, "dport") == 0) {
  50                 NEXT_ARG();
  51                 tkey->off = 2;
  52                 res = parse_cmd(&argc, &argv, 2, TU32, RU16, sel, tkey);
  53                 goto done;
  54         }
  55
  56         return -1;
  57
  58 done:
  59         *argc_p = argc;
  60         *argv_p = argv;
  61         return res;
  62 }
  63
  64 struct m_pedit_util p_pedit_udp = {
  65         NULL,
  66         "udp",
  67         parse_udp,
  68 };