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
  74         return ipaddress;
  75 }
  76
  77 void connman_ipaddress_free(struct connman_ipaddress *ipaddress)
  78 {
  79         if (!ipaddress)
  80                 return;
  81
  82         g_free(ipaddress->broadcast);
  83         g_free(ipaddress->peer);
  84         g_free(ipaddress->local);
  85         g_free(ipaddress->gateway);
  86         g_free(ipaddress);
  87 }
  88
  89 static bool check_ipv6_address(const char *address)
  90 {
  91         unsigned char buf[sizeof(struct in6_addr)];
  92         int err;
  93
  94         if (!address)
  95                 return false;
  96
  97         err = inet_pton(AF_INET6, address, buf);
  98         if (err > 0)
  99                 return true;
 100
 101         return false;
 102 }
 103
 104 int connman_ipaddress_set_ipv6(struct connman_ipaddress *ipaddress,
 105                                 const char *address,
 106                                 unsigned char prefix_length,
 107                                 const char *gateway)
 108 {
 109         if (!ipaddress)
 110                 return -EINVAL;
 111
 112         if (!check_ipv6_address(address))
 113                 return -EINVAL;
 114
 115         DBG("prefix_len %d address %s gateway %s",
 116                         prefix_length, address, gateway);
 117
 118         ipaddress->family = AF_INET6;
 119
 120         ipaddress->prefixlen = prefix_length;
 121
 122         g_free(ipaddress->local);
 123         ipaddress->local = g_strdup(address);
 124
 125         g_free(ipaddress->gateway);
 126         ipaddress->gateway = g_strdup(gateway);
 127
 128         return 0;
 129 }
 130
 131 int connman_ipaddress_get_ip(struct connman_ipaddress *ipaddress,
 132                         const char **address,
 133                         unsigned char *netmask_prefix_length)
 134 {
 135         if (!ipaddress)
 136                 return -EINVAL;
 137
 138         *netmask_prefix_length = ipaddress->prefixlen;
 139         *address = ipaddress->local;
 140
 141         return 0;
 142 }
 143
 144 int connman_ipaddress_set_ipv4(struct connman_ipaddress *ipaddress,
 145                 const char *address, const char *netmask, const char *gateway)
 146 {
 147         if (!ipaddress)
 148                 return -EINVAL;
 149
 150         ipaddress->family = AF_INET;
 151
 152         ipaddress->prefixlen = connman_ipaddress_calc_netmask_len(netmask);
 153
 154         g_free(ipaddress->local);
 155         ipaddress->local = g_strdup(address);
 156
 157         g_free(ipaddress->gateway);
 158         ipaddress->gateway = g_strdup(gateway);
 159
 160         return 0;
 161 }
 162
 163 void connman_ipaddress_set_peer(struct connman_ipaddress *ipaddress,
 164                                 const char *peer)
 165 {
 166         if (!ipaddress)
 167                 return;
 168
 169         g_free(ipaddress->peer);
 170         ipaddress->peer = g_strdup(peer);
 171 }
 172
 173 void connman_ipaddress_clear(struct connman_ipaddress *ipaddress)
 174 {
 175         if (!ipaddress)
 176                 return;
 177
 178         ipaddress->prefixlen = 0;
 179
 180         g_free(ipaddress->local);
 181         ipaddress->local = NULL;
 182
 183         g_free(ipaddress->peer);
 184         ipaddress->peer = NULL;
 185
 186         g_free(ipaddress->broadcast);
 187         ipaddress->broadcast = NULL;
 188
 189         g_free(ipaddress->gateway);
 190         ipaddress->gateway = NULL;
 191 }
 192
 193 /*
 194  * Note that this copy function only copies the actual address and
 195  * prefixlen. Use the other copy function to copy the whole struct.
 196  */
 197 void connman_ipaddress_copy_address(struct connman_ipaddress *ipaddress,
 198                                         struct connman_ipaddress *source)
 199 {
 200         if (!ipaddress || !source)
 201                 return;
 202
 203         ipaddress->family = source->family;
 204         ipaddress->prefixlen = source->prefixlen;
 205
 206         g_free(ipaddress->local);
 207         ipaddress->local = g_strdup(source->local);
 208 }
 209
 210 struct connman_ipaddress *
 211 connman_ipaddress_copy(struct connman_ipaddress *ipaddress)
 212 {
 213         struct connman_ipaddress *copy;
 214
 215         if (!ipaddress)
 216                 return NULL;
 217
 218         copy = g_new0(struct connman_ipaddress, 1);
 219
 220         copy->family = ipaddress->family;
 221         copy->prefixlen = ipaddress->prefixlen;
 222         copy->local = g_strdup(ipaddress->local);
 223         copy->peer = g_strdup(ipaddress->peer);
 224         copy->broadcast = g_strdup(ipaddress->broadcast);
 225         copy->gateway = g_strdup(ipaddress->gateway);
 226
 227         return copy;
 228 }