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 <fcntl.h>
  17 #include <string.h>
  18 #include <sys/socket.h>
  19 #include <netinet/in.h>
  20
  21 #include "rt_names.h"
  22 #include "utils.h"
  23
  24 char *rtnl_rtntype_n2a(int id, char *buf, int len)
  25 {
  26         switch (id) {
  27         case RTN_UNSPEC:
  28                 return "none";
  29         case RTN_UNICAST:
  30                 return "unicast";
  31         case RTN_LOCAL:
  32                 return "local";
  33         case RTN_BROADCAST:
  34                 return "broadcast";
  35         case RTN_ANYCAST:
  36                 return "anycast";
  37         case RTN_MULTICAST:
  38                 return "multicast";
  39         case RTN_BLACKHOLE:
  40                 return "blackhole";
  41         case RTN_UNREACHABLE:
  42                 return "unreachable";
  43         case RTN_PROHIBIT:
  44                 return "prohibit";
  45         case RTN_THROW:
  46                 return "throw";
  47         case RTN_NAT:
  48                 return "nat";
  49         case RTN_XRESOLVE:
  50                 return "xresolve";
  51         default:
  52                 snprintf(buf, len, "%d", id);
  53                 return buf;
  54         }
  55 }
  56
  57
  58 int rtnl_rtntype_a2n(int *id, char *arg)
  59 {
  60         char *end;
  61         unsigned long res;
  62
  63         if (strcmp(arg, "local") == 0)
  64                 res = RTN_LOCAL;
  65         else if (strcmp(arg, "nat") == 0)
  66                 res = RTN_NAT;
  67         else if (matches(arg, "broadcast") == 0 ||
  68                  strcmp(arg, "brd") == 0)
  69                 res = RTN_BROADCAST;
  70         else if (matches(arg, "anycast") == 0)
  71                 res = RTN_ANYCAST;
  72         else if (matches(arg, "multicast") == 0)
  73                 res = RTN_MULTICAST;
  74         else if (matches(arg, "prohibit") == 0)
  75                 res = RTN_PROHIBIT;
  76         else if (matches(arg, "unreachable") == 0)
  77                 res = RTN_UNREACHABLE;
  78         else if (matches(arg, "blackhole") == 0)
  79                 res = RTN_BLACKHOLE;
  80         else if (matches(arg, "xresolve") == 0)
  81                 res = RTN_XRESOLVE;
  82         else if (matches(arg, "unicast") == 0)
  83                 res = RTN_UNICAST;
  84         else if (strcmp(arg, "throw") == 0)
  85                 res = RTN_THROW;
  86         else {
  87                 res = strtoul(arg, &end, 0);
  88                 if (!end || end == arg || *end || res > 255)
  89                         return -1;
  90         }
  91         *id = res;
  92         return 0;
  93 }
  94
  95 static int get_rt_realms(__u32 *realms, char *arg)
  96 {
  97         __u32 realm = 0;
  98         char *p = strchr(arg, '/');
  99
 100         *realms = 0;
 101         if (p) {
 102                 *p = 0;
 103                 if (rtnl_rtrealm_a2n(realms, arg)) {
 104                         *p = '/';
 105                         return -1;
 106                 }
 107                 *realms <<= 16;
 108                 *p = '/';
 109                 arg = p+1;
 110         }
 111         if (*arg && rtnl_rtrealm_a2n(&realm, arg))
 112                 return -1;
 113         *realms |= realm;
 114         return 0;
 115 }
 116
 117 int get_rt_realms_or_raw(__u32 *realms, char *arg)
 118 {
 119         if (!get_rt_realms(realms, arg))
 120                 return 0;
 121
 122         return get_unsigned(realms, arg, 0);
 123 }