src/ipaddress.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2013  Intel Corporation. All rights reserved.
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License version 2 as
   9  *  published by the Free Software Foundation.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  19  *
  20  */
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <errno.h>
  27 #include <stdio.h>
  28 #include <string.h>
  29 #include <stdlib.h>
  30 #include <glib.h>
  31
  32 #include <connman/ipaddress.h>
  33
  34 #include "connman.h"
  35
  36 unsigned char connman_ipaddress_calc_netmask_len(const char *netmask)
  37 {
  38         unsigned char bits;
  39         in_addr_t mask;
  40         in_addr_t host;
  41
  42         if (!netmask)
  43                 return 32;
  44
  45         mask = inet_network(netmask);
  46         host = ~mask;
  47
  48         /* a valid netmask must be 2^n - 1 */
  49         if ((host & (host + 1)) != 0)
  50                 return -1;
  51
  52         bits = 0;
  53         for (; mask; mask <<= 1)
  54                 ++bits;
  55
  56         return bits;
  57 }
  58
  59 struct connman_ipaddress *connman_ipaddress_alloc(int family)
  60 {
  61         struct connman_ipaddress *ipaddress;
  62
  63         ipaddress = g_try_new0(struct connman_ipaddress, 1);
  64         if (!ipaddress)
  65                 return NULL;
  66
  67         ipaddress->family = family;
  68         ipaddress->prefixlen = 0;
  69         ipaddress->local = NULL;
  70         ipaddress->peer = NULL;
  71         ipaddress->broadcast = NULL;
  72         ipaddress->gateway = NULL;
  73         ipaddress->is_p2p = false;
  74
  75         return ipaddress;
  76 }
  77
  78 void connman_ipaddress_set_p2p(struct connman_ipaddress *ipaddress, bool value)
  79 {
  80         if (!ipaddress)
  81                 return;
  82
  83         ipaddress->is_p2p = value;
  84 }
  85
  86 void connman_ipaddress_free(struct connman_ipaddress *ipaddress)
  87 {
  88         if (!ipaddress)
  89                 return;
  90
  91         g_free(ipaddress->broadcast);
  92         g_free(ipaddress->peer);
  93         g_free(ipaddress->local);
  94         g_free(ipaddress->gateway);
  95         g_free(ipaddress);
  96 }
  97
  98 static bool check_ipv6_address(const char *address)
  99 {
 100         unsigned char buf[sizeof(struct in6_addr)];
 101         int err;
 102
 103         if (!address)
 104                 return false;
 105
 106         err = inet_pton(AF_INET6, address, buf);
 107         if (err == 1)
 108                 return true;
 109
 110         return false;
 111 }
 112
 113 int connman_ipaddress_set_ipv6(struct connman_ipaddress *ipaddress,
 114                                 const char *address,
 115                                 unsigned char prefix_length,
 116                                 const char *gateway)
 117 {
 118         if (!ipaddress)
 119                 return -EINVAL;
 120
 121         if (!check_ipv6_address(address))
 122                 return -EINVAL;
 123
 124         DBG("prefix_len %d address %s gateway %s",
 125                         prefix_length, address, gateway);
 126
 127         ipaddress->family = AF_INET6;
 128
 129         ipaddress->prefixlen = prefix_length;
 130
 131         g_free(ipaddress->local);
 132         ipaddress->local = g_strdup(address);
 133
 134         g_free(ipaddress->gateway);
 135         ipaddress->gateway = g_strdup(gateway);
 136
 137         return 0;
 138 }
 139
 140 int connman_ipaddress_get_ip(struct connman_ipaddress *ipaddress,
 141                         const char **address,
 142                         unsigned char *netmask_prefix_length)
 143 {
 144         if (!ipaddress)
 145                 return -EINVAL;
 146
 147         *netmask_prefix_length = ipaddress->prefixlen;
 148         *address = ipaddress->local;
 149
 150         return 0;
 151 }
 152
 153 int connman_ipaddress_set_ipv4(struct connman_ipaddress *ipaddress,
 154                 const char *address, const char *netmask, const char *gateway)
 155 {
 156         if (!ipaddress)
 157                 return -EINVAL;
 158
 159         ipaddress->family = AF_INET;
 160
 161         ipaddress->prefixlen = connman_ipaddress_calc_netmask_len(netmask);
 162
 163         g_free(ipaddress->local);
 164         ipaddress->local = g_strdup(address);
 165
 166         g_free(ipaddress->gateway);
 167         ipaddress->gateway = g_strdup(gateway);
 168
 169         return 0;
 170 }
 171
 172 void connman_ipaddress_set_peer(struct connman_ipaddress *ipaddress,
 173                                 const char *peer)
 174 {
 175         if (!ipaddress)
 176                 return;
 177
 178         g_free(ipaddress->peer);
 179         ipaddress->peer = g_strdup(peer);
 180 }
 181
 182 void connman_ipaddress_clear(struct connman_ipaddress *ipaddress)
 183 {
 184         if (!ipaddress)
 185                 return;
 186
 187         ipaddress->prefixlen = 0;
 188
 189         g_free(ipaddress->local);
 190         ipaddress->local = NULL;
 191
 192         g_free(ipaddress->peer);
 193         ipaddress->peer = NULL;
 194
 195         g_free(ipaddress->broadcast);
 196         ipaddress->broadcast = NULL;
 197
 198         g_free(ipaddress->gateway);
 199         ipaddress->gateway = NULL;
 200 }
 201
 202 /*
 203  * Note that this copy function only copies the actual address and
 204  * prefixlen. Use the other copy function to copy the whole struct.
 205  */
 206 void connman_ipaddress_copy_address(struct connman_ipaddress *ipaddress,
 207                                         struct connman_ipaddress *source)
 208 {
 209         if (!ipaddress || !source)
 210                 return;
 211
 212         ipaddress->family = source->family;
 213         ipaddress->prefixlen = source->prefixlen;
 214
 215         g_free(ipaddress->local);
 216         ipaddress->local = g_strdup(source->local);
 217 }
 218
 219 struct connman_ipaddress *
 220 connman_ipaddress_copy(struct connman_ipaddress *ipaddress)
 221 {
 222         struct connman_ipaddress *copy;
 223
 224         if (!ipaddress)
 225                 return NULL;
 226
 227         copy = g_new0(struct connman_ipaddress, 1);
 228
 229         copy->family = ipaddress->family;
 230         copy->prefixlen = ipaddress->prefixlen;
 231         copy->local = g_strdup(ipaddress->local);
 232         copy->peer = g_strdup(ipaddress->peer);
 233         copy->broadcast = g_strdup(ipaddress->broadcast);
 234         copy->gateway = g_strdup(ipaddress->gateway);
 235         copy->is_p2p = ipaddress->is_p2p;
 236
 237         return copy;
 238 }