LXR iproute2/tc/p

   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 <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
  25static int
  26parse_udp(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_UDP;
  40
  41        if (strcmp(*argv, "sport") == 0) {
  42                NEXT_ARG();
  43                tkey->off = 0;
  44                res = parse_cmd(&argc, &argv, 2, TU32, RU16, sel, tkey, 0);
  45                goto done;
  46        }
  47
  48        if (strcmp(*argv, "dport") == 0) {
  49                NEXT_ARG();
  50                tkey->off = 2;
  51                res = parse_cmd(&argc, &argv, 2, TU32, RU16, sel, tkey, 0);
  52                goto done;
  53        }
  54
  55        return -1;
  56
  57done:
  58        *argc_p = argc;
  59        *argv_p = argv;
  60        return res;
  61}
  62
  63struct m_pedit_util p_pedit_udp = {
  64        .id = "udp",
  65        .parse_peopt = parse_udp,
  66};
  67