LXR busybox/networking/libiproute/ip_parse_common

   1/* vi: set sw=4 ts=4: */
   2/*
   3 * This program is free software; you can redistribute it and/or
   4 * modify it under the terms of the GNU General Public License
   5 * as published by the Free Software Foundation; either version
   6 * 2 of the License, or (at your option) any later version.
   7 *
   8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
   9 *
  10 * Changes:
  11 *
  12 * Rani Assaf <rani@magic.metawire.com> 980929: resolve addresses
  13 */
  14#include "ip_common.h"  /* #include "libbb.h" is inside */
  15#include "utils.h"
  16
  17family_t preferred_family = AF_UNSPEC;
  18smallint oneline;
  19char _SL_;
  20
  21char** FAST_FUNC ip_parse_common_args(char **argv)
  22{
  23        static const char ip_common_commands[] ALIGN1 =
  24                "oneline" "\0"
  25                "family" "\0"
  26                "4" "\0"
  27                "6" "\0"
  28                "0" "\0"
  29                ;
  30        enum {
  31                ARG_oneline,
  32                ARG_family,
  33                ARG_IPv4,
  34                ARG_IPv6,
  35                ARG_packet,
  36        };
  37        static const family_t af_numbers[] = { AF_INET, AF_INET6, AF_PACKET };
  38        int arg;
  39
  40        while (*argv) {
  41                char *opt = *argv;
  42
  43                if (opt[0] != '-')
  44                        break;
  45                opt++;
  46                if (opt[0] == '-') {
  47                        opt++;
  48                        if (!opt[0]) { /* "--" */
  49                                argv++;
  50                                break;
  51                        }
  52                }
  53                arg = index_in_substrings(ip_common_commands, opt);
  54                if (arg < 0)
  55                        bb_show_usage();
  56                if (arg == ARG_oneline) {
  57                        oneline = 1;
  58                        argv++;
  59                        continue;
  60                }
  61                if (arg == ARG_family) {
  62                        static const char families[] ALIGN1 =
  63                                "inet" "\0" "inet6" "\0" "link" "\0";
  64                        argv++;
  65                        if (!*argv)
  66                                bb_show_usage();
  67                        arg = index_in_strings(families, *argv);
  68                        if (arg < 0)
  69                                invarg_1_to_2(*argv, "family");
  70                        /* now arg == 0, 1 or 2 */
  71                } else {
  72                        arg -= ARG_IPv4;
  73                        /* now arg == 0, 1 or 2 */
  74                }
  75                preferred_family = af_numbers[arg];
  76                argv++;
  77        }
  78        _SL_ = oneline ? '\\' : '\n';
  79        return argv;
  80}
  81