networking/libiproute/ip_parse_common_args.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * ip.c         "ip" utility frontend.
   4  *
   5  *              This program is free software; you can redistribute it and/or
   6  *              modify it under the terms of the GNU General Public License
   7  *              as published by the Free Software Foundation; either version
   8  *              2 of the License, or (at your option) any later version.
   9  *
  10  * Authors:     Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
  11  *
  12  *
  13  * Changes:
  14  *
  15  * Rani Assaf <rani@magic.metawire.com> 980929: resolve addresses
  16  */
  17
  18 #include "ip_common.h"  /* #include "libbb.h" is inside */
  19 #include "utils.h"
  20
  21 int preferred_family = AF_UNSPEC;
  22 smallint oneline;
  23 char _SL_;
  24
  25 void ip_parse_common_args(int *argcp, char ***argvp)
  26 {
  27         int argc = *argcp;
  28         char **argv = *argvp;
  29         static const char * const ip_common_commands[] =
  30                 {"-family", "inet", "inet6", "link",
  31                  "-4", "-6", "-0", "-oneline", 0};
  32         enum {
  33                 ARG_family = 1,
  34                 ARG_inet,
  35                 ARG_inet6,
  36                 ARG_link,
  37                 ARG_IPv4,
  38                 ARG_IPv6,
  39                 ARG_packet,
  40                 ARG_oneline
  41         };
  42         smalluint arg;
  43
  44         while (argc > 1) {
  45                 char *opt = argv[1];
  46
  47                 if (strcmp(opt,"--") == 0) {
  48                         argc--;
  49                         argv++;
  50                         break;
  51                 }
  52                 if (opt[0] != '-')
  53                         break;
  54                 if (opt[1] == '-')
  55                         opt++;
  56                 arg = index_in_str_array(ip_common_commands, opt) + 1;
  57                 if (arg == ARG_family) {
  58                         argc--;
  59                         argv++;
  60                         if (!argv[1])
  61                                 bb_show_usage();
  62                         arg = index_in_str_array(ip_common_commands, argv[1]) + 1;
  63                         if (arg == ARG_inet)
  64                                 preferred_family = AF_INET;
  65                         else if (arg == ARG_inet6)
  66                                 preferred_family = AF_INET6;
  67                         else if (arg == ARG_link)
  68                                 preferred_family = AF_PACKET;
  69                         else
  70                                 invarg(argv[1], "protocol family");
  71                 } else if (arg == ARG_IPv4) {
  72                         preferred_family = AF_INET;
  73                 } else if (arg == ARG_IPv6) {
  74                         preferred_family = AF_INET6;
  75                 } else if (arg == ARG_packet) {
  76                         preferred_family = AF_PACKET;
  77                 } else if (arg == ARG_oneline) {
  78                         ++oneline;
  79                 } else {
  80                         bb_show_usage();
  81                 }
  82                 argc--;
  83                 argv++;
  84         }
  85         _SL_ = oneline ? '\\' : '\n';
  86         *argcp = argc;
  87         *argvp = argv;
  88 }