networking/libiproute/rtm_map.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * rtm_map.c
   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
  14 #include "libbb.h"
  15 #include "rt_names.h"
  16 #include "utils.h"
  17
  18 const char* FAST_FUNC rtnl_rtntype_n2a(int id, char *buf)
  19 {
  20         switch (id) {
  21         case RTN_UNSPEC:
  22                 return "none";
  23         case RTN_UNICAST:
  24                 return "unicast";
  25         case RTN_LOCAL:
  26                 return "local";
  27         case RTN_BROADCAST:
  28                 return "broadcast";
  29         case RTN_ANYCAST:
  30                 return "anycast";
  31         case RTN_MULTICAST:
  32                 return "multicast";
  33         case RTN_BLACKHOLE:
  34                 return "blackhole";
  35         case RTN_UNREACHABLE:
  36                 return "unreachable";
  37         case RTN_PROHIBIT:
  38                 return "prohibit";
  39         case RTN_THROW:
  40                 return "throw";
  41         case RTN_NAT:
  42                 return "nat";
  43         case RTN_XRESOLVE:
  44                 return "xresolve";
  45         default:
  46                 /* buf is SPRINT_BSIZE big */
  47                 sprintf(buf, "%d", id);
  48                 return buf;
  49         }
  50 }
  51
  52
  53 int FAST_FUNC rtnl_rtntype_a2n(int *id, char *arg)
  54 {
  55         static const char keywords[] ALIGN1 =
  56                 "local\0""nat\0""broadcast\0""brd\0""anycast\0"
  57                 "multicast\0""prohibit\0""unreachable\0""blackhole\0"
  58                 "xresolve\0""unicast\0""throw\0";
  59         enum {
  60                 ARG_local = 1, ARG_nat, ARG_broadcast, ARG_brd, ARG_anycast,
  61                 ARG_multicast, ARG_prohibit, ARG_unreachable, ARG_blackhole,
  62                 ARG_xresolve, ARG_unicast, ARG_throw
  63         };
  64         const smalluint key = index_in_substrings(keywords, arg) + 1;
  65         char *end;
  66         unsigned long res;
  67
  68         if (key == ARG_local)
  69                 res = RTN_LOCAL;
  70         else if (key == ARG_nat)
  71                 res = RTN_NAT;
  72         else if (key == ARG_broadcast || key == ARG_brd)
  73                 res = RTN_BROADCAST;
  74         else if (key == ARG_anycast)
  75                 res = RTN_ANYCAST;
  76         else if (key == ARG_multicast)
  77                 res = RTN_MULTICAST;
  78         else if (key == ARG_prohibit)
  79                 res = RTN_PROHIBIT;
  80         else if (key == ARG_unreachable)
  81                 res = RTN_UNREACHABLE;
  82         else if (key == ARG_blackhole)
  83                 res = RTN_BLACKHOLE;
  84         else if (key == ARG_xresolve)
  85                 res = RTN_XRESOLVE;
  86         else if (key == ARG_unicast)
  87                 res = RTN_UNICAST;
  88         else if (key == ARG_throw)
  89                 res = RTN_THROW;
  90         else {
  91                 res = strtoul(arg, &end, 0);
  92                 if (end == arg || *end || res > 255)
  93                         return -1;
  94         }
  95         *id = res;
  96         return 0;
  97 }
  98
  99 int FAST_FUNC get_rt_realms(uint32_t *realms, char *arg)
 100 {
 101         uint32_t realm = 0;
 102         char *p = strchr(arg, '/');
 103
 104         *realms = 0;
 105         if (p) {
 106                 *p = 0;
 107                 if (rtnl_rtrealm_a2n(realms, arg)) {
 108                         *p = '/';
 109                         return -1;
 110                 }
 111                 *realms <<= 16;
 112                 *p = '/';
 113                 arg = p+1;
 114         }
 115         if (*arg && rtnl_rtrealm_a2n(&realm, arg))
 116                 return -1;
 117         *realms |= realm;
 118         return 0;
 119 }