release/src/router/busybox/networking/libiproute/rtm_map.c

   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
  11 #include "libbb.h"
  12 #include "rt_names.h"
  13 #include "utils.h"
  14
  15 const char* FAST_FUNC rtnl_rtntype_n2a(int id)
  16 {
  17         switch (id) {
  18         case RTN_UNSPEC:
  19                 return "none";
  20         case RTN_UNICAST:
  21                 return "unicast";
  22         case RTN_LOCAL:
  23                 return "local";
  24         case RTN_BROADCAST:
  25                 return "broadcast";
  26         case RTN_ANYCAST:
  27                 return "anycast";
  28         case RTN_MULTICAST:
  29                 return "multicast";
  30         case RTN_BLACKHOLE:
  31                 return "blackhole";
  32         case RTN_UNREACHABLE:
  33                 return "unreachable";
  34         case RTN_PROHIBIT:
  35                 return "prohibit";
  36         case RTN_THROW:
  37                 return "throw";
  38         case RTN_NAT:
  39                 return "nat";
  40         case RTN_XRESOLVE:
  41                 return "xresolve";
  42         default:
  43                 return itoa(id);
  44         }
  45 }
  46
  47
  48 int FAST_FUNC rtnl_rtntype_a2n(int *id, char *arg)
  49 {
  50         static const char keywords[] ALIGN1 =
  51                 "local\0""nat\0""broadcast\0""brd\0""anycast\0"
  52                 "multicast\0""prohibit\0""unreachable\0""blackhole\0"
  53                 "xresolve\0""unicast\0""throw\0";
  54         enum {
  55                 ARG_local = 1, ARG_nat, ARG_broadcast, ARG_brd, ARG_anycast,
  56                 ARG_multicast, ARG_prohibit, ARG_unreachable, ARG_blackhole,
  57                 ARG_xresolve, ARG_unicast, ARG_throw
  58         };
  59         const smalluint key = index_in_substrings(keywords, arg) + 1;
  60         char *end;
  61         unsigned long res;
  62
  63         if (key == ARG_local)
  64                 res = RTN_LOCAL;
  65         else if (key == ARG_nat)
  66                 res = RTN_NAT;
  67         else if (key == ARG_broadcast || key == ARG_brd)
  68                 res = RTN_BROADCAST;
  69         else if (key == ARG_anycast)
  70                 res = RTN_ANYCAST;
  71         else if (key == ARG_multicast)
  72                 res = RTN_MULTICAST;
  73         else if (key == ARG_prohibit)
  74                 res = RTN_PROHIBIT;
  75         else if (key == ARG_unreachable)
  76                 res = RTN_UNREACHABLE;
  77         else if (key == ARG_blackhole)
  78                 res = RTN_BLACKHOLE;
  79         else if (key == ARG_xresolve)
  80                 res = RTN_XRESOLVE;
  81         else if (key == ARG_unicast)
  82                 res = RTN_UNICAST;
  83         else if (key == ARG_throw)
  84                 res = RTN_THROW;
  85         else {
  86                 res = strtoul(arg, &end, 0);
  87                 if (end == arg || *end || res > 255)
  88                         return -1;
  89         }
  90         *id = res;
  91         return 0;
  92 }
  93
  94 int FAST_FUNC get_rt_realms(uint32_t *realms, char *arg)
  95 {
  96         uint32_t realm = 0;
  97         char *p = strchr(arg, '/');
  98
  99         *realms = 0;
 100         if (p) {
 101                 *p = 0;
 102                 if (rtnl_rtrealm_a2n(realms, arg)) {
 103                         *p = '/';
 104                         return -1;
 105                 }
 106                 *realms <<= 16;
 107                 *p = '/';
 108                 arg = p+1;
 109         }
 110         if (*arg && rtnl_rtrealm_a2n(&realm, arg))
 111                 return -1;
 112         *realms |= realm;
 113         return 0;
 114 }