ip/rtm_map.c

   1 /*
   2  * rtm_map.c
   3  *
   4  *              This program is free software; you can redistribute it and/or
   5  *              modify it under the terms of the GNU General Public License
   6  *              as published by the Free Software Foundation; either version
   7  *              2 of the License, or (at your option) any later version.
   8  *
   9  * Authors:     Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
  10  *
  11  */
  12
  13 #include <stdio.h>
  14 #include <stdlib.h>
  15 #include <unistd.h>
  16 #include <syslog.h>
  17 #include <fcntl.h>
  18 #include <string.h>
  19 #include <sys/socket.h>
  20 #include <netinet/in.h>
  21
  22 #include "rt_names.h"
  23 #include "utils.h"
  24
  25 char *rtnl_rtntype_n2a(int id, char *buf, int len)
  26 {
  27         switch (id) {
  28         case RTN_UNSPEC:
  29                 return "none";
  30         case RTN_UNICAST:
  31                 return "unicast";
  32         case RTN_LOCAL:
  33                 return "local";
  34         case RTN_BROADCAST:
  35                 return "broadcast";
  36         case RTN_ANYCAST:
  37                 return "anycast";
  38         case RTN_MULTICAST:
  39                 return "multicast";
  40         case RTN_BLACKHOLE:
  41                 return "blackhole";
  42         case RTN_UNREACHABLE:
  43                 return "unreachable";
  44         case RTN_PROHIBIT:
  45                 return "prohibit";
  46         case RTN_THROW:
  47                 return "throw";
  48         case RTN_NAT:
  49                 return "nat";
  50         case RTN_XRESOLVE:
  51                 return "xresolve";
  52         default:
  53                 snprintf(buf, len, "%d", id);
  54                 return buf;
  55         }
  56 }
  57
  58
  59 int rtnl_rtntype_a2n(int *id, char *arg)
  60 {
  61         char *end;
  62         unsigned long res;
  63
  64         if (strcmp(arg, "local") == 0)
  65                 res = RTN_LOCAL;
  66         else if (strcmp(arg, "nat") == 0)
  67                 res = RTN_NAT;
  68         else if (matches(arg, "broadcast") == 0 ||
  69                  strcmp(arg, "brd") == 0)
  70                 res = RTN_BROADCAST;
  71         else if (matches(arg, "anycast") == 0)
  72                 res = RTN_ANYCAST;
  73         else if (matches(arg, "multicast") == 0)
  74                 res = RTN_MULTICAST;
  75         else if (matches(arg, "prohibit") == 0)
  76                 res = RTN_PROHIBIT;
  77         else if (matches(arg, "unreachable") == 0)
  78                 res = RTN_UNREACHABLE;
  79         else if (matches(arg, "blackhole") == 0)
  80                 res = RTN_BLACKHOLE;
  81         else if (matches(arg, "xresolve") == 0)
  82                 res = RTN_XRESOLVE;
  83         else if (matches(arg, "unicast") == 0)
  84                 res = RTN_UNICAST;
  85         else if (strcmp(arg, "throw") == 0)
  86                 res = RTN_THROW;
  87         else {
  88                 res = strtoul(arg, &end, 0);
  89                 if (!end || end == arg || *end || res > 255)
  90                         return -1;
  91         }
  92         *id = res;
  93         return 0;
  94 }
  95
  96 int get_rt_realms(__u32 *realms, char *arg)
  97 {
  98         __u32 realm = 0;
  99         char *p = strchr(arg, '/');
 100
 101         *realms = 0;
 102         if (p) {
 103                 *p = 0;
 104                 if (rtnl_rtrealm_a2n(realms, arg)) {
 105                         *p = '/';
 106                         return -1;
 107                 }
 108                 *realms <<= 16;
 109                 *p = '/';
 110                 arg = p+1;
 111         }
 112         if (*arg && rtnl_rtrealm_a2n(&realm, arg))
 113                 return -1;
 114         *realms |= realm;
 115         return 0;
 116 }