LXR busybox/networking/libiproute/rtm

   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
  18const char *rtnl_rtntype_n2a(int id, char *buf, int len)
  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                snprintf(buf, len, "%d", id);
  47                return buf;
  48        }
  49}
  50
  51
  52int rtnl_rtntype_a2n(int *id, char *arg)
  53{
  54        static const char keywords[] ALIGN1 =
  55                "local\0""nat\0""broadcast\0""brd\0""anycast\0"
  56                "multicast\0""prohibit\0""unreachable\0""blackhole\0"
  57                "xresolve\0""unicast\0""throw\0";
  58        enum {
  59                ARG_local = 1, ARG_nat, ARG_broadcast, ARG_brd, ARG_anycast,
  60                ARG_multicast, ARG_prohibit, ARG_unreachable, ARG_blackhole,
  61                ARG_xresolve, ARG_unicast, ARG_throw
  62        };
  63        const smalluint key = index_in_substrings(keywords, arg) + 1;
  64        char *end;
  65        unsigned long res;
  66
  67        if (key == ARG_local)
  68                res = RTN_LOCAL;
  69        else if (key == ARG_nat)
  70                res = RTN_NAT;
  71        else if (key == ARG_broadcast || key == ARG_brd)
  72                res = RTN_BROADCAST;
  73        else if (key == ARG_anycast)
  74                res = RTN_ANYCAST;
  75        else if (key == ARG_multicast)
  76                res = RTN_MULTICAST;
  77        else if (key == ARG_prohibit)
  78                res = RTN_PROHIBIT;
  79        else if (key == ARG_unreachable)
  80                res = RTN_UNREACHABLE;
  81        else if (key == ARG_blackhole)
  82                res = RTN_BLACKHOLE;
  83        else if (key == ARG_xresolve)
  84                res = RTN_XRESOLVE;
  85        else if (key == ARG_unicast)
  86                res = RTN_UNICAST;
  87        else if (key == ARG_throw)
  88                res = RTN_THROW;
  89        else {
  90                res = strtoul(arg, &end, 0);
  91                if (!end || end == arg || *end || res > 255)
  92                        return -1;
  93        }
  94        *id = res;
  95        return 0;
  96}
  97
  98int get_rt_realms(uint32_t *realms, char *arg)
  99{
 100        uint32_t realm = 0;
 101        char *p = strchr(arg, '/');
 102
 103        *realms = 0;
 104        if (p) {
 105                *p = 0;
 106                if (rtnl_rtrealm_a2n(realms, arg)) {
 107                        *p = '/';
 108                        return -1;
 109                }
 110                *realms <<= 16;
 111                *p = '/';
 112                arg = p+1;
 113        }
 114        if (*arg && rtnl_rtrealm_a2n(&realm, arg))
 115                return -1;
 116        *realms |= realm;
 117        return 0;
 118}
 119