src/ipaddress.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2012  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 struct connman_ipaddress *connman_ipaddress_alloc(int family)
  37 {
  38         struct connman_ipaddress *ipaddress;
  39
  40         ipaddress = g_try_new0(struct connman_ipaddress, 1);
  41         if (ipaddress == NULL)
  42                 return NULL;
  43
  44         ipaddress->family = family;
  45         ipaddress->prefixlen = 0;
  46         ipaddress->local = NULL;
  47         ipaddress->peer = NULL;
  48         ipaddress->broadcast = NULL;
  49         ipaddress->gateway = NULL;
  50
  51         return ipaddress;
  52 }
  53
  54 void connman_ipaddress_free(struct connman_ipaddress *ipaddress)
  55 {
  56         if (ipaddress == NULL)
  57                 return;
  58
  59         g_free(ipaddress->broadcast);
  60         g_free(ipaddress->peer);
  61         g_free(ipaddress->local);
  62         g_free(ipaddress->gateway);
  63         g_free(ipaddress);
  64 }
  65
  66 unsigned char __connman_ipaddress_netmask_prefix_len(const char *netmask)
  67 {
  68         unsigned char bits;
  69         in_addr_t mask;
  70         in_addr_t host;
  71
  72         if (netmask == NULL)
  73                 return 32;
  74
  75         mask = inet_network(netmask);
  76         host = ~mask;
  77
  78         /* a valid netmask must be 2^n - 1 */
  79         if ((host & (host + 1)) != 0)
  80                 return -1;
  81
  82         bits = 0;
  83         for (; mask; mask <<= 1)
  84                 ++bits;
  85
  86         return bits;
  87 }
  88
  89 static gboolean check_ipv6_address(const char *address)
  90 {
  91         unsigned char buf[sizeof(struct in6_addr)];
  92         int err;
  93
  94         if (address == NULL)
  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 == NULL)
 110                 return -EINVAL;
 111
 112         if (check_ipv6_address(address) == FALSE)
 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_set_ipv4(struct connman_ipaddress *ipaddress,
 132                 const char *address, const char *netmask, const char *gateway)
 133 {
 134         if (ipaddress == NULL)
 135                 return -EINVAL;
 136
 137         ipaddress->family = AF_INET;
 138
 139         ipaddress->prefixlen = __connman_ipaddress_netmask_prefix_len(netmask);
 140
 141         g_free(ipaddress->local);
 142         ipaddress->local = g_strdup(address);
 143
 144         g_free(ipaddress->gateway);
 145         ipaddress->gateway = g_strdup(gateway);
 146
 147         return 0;
 148 }
 149
 150 void connman_ipaddress_set_peer(struct connman_ipaddress *ipaddress,
 151                                 const char *peer)
 152 {
 153         if (ipaddress == NULL)
 154                 return;
 155
 156         g_free(ipaddress->peer);
 157         ipaddress->peer = g_strdup(peer);
 158 }
 159
 160 void connman_ipaddress_clear(struct connman_ipaddress *ipaddress)
 161 {
 162         if (ipaddress == NULL)
 163                 return;
 164
 165         ipaddress->prefixlen = 0;
 166
 167         g_free(ipaddress->local);
 168         ipaddress->local = NULL;
 169
 170         g_free(ipaddress->peer);
 171         ipaddress->peer = NULL;
 172
 173         g_free(ipaddress->broadcast);
 174         ipaddress->broadcast = NULL;
 175
 176         g_free(ipaddress->gateway);
 177         ipaddress->gateway = NULL;
 178 }
 179
 180 /*
 181  * Note that this copy function only copies the actual address and
 182  * prefixlen. If you need full copy of ipaddress struct, then you need
 183  * to create a new function that does that.
 184  */
 185 void connman_ipaddress_copy_address(struct connman_ipaddress *ipaddress,
 186                                         struct connman_ipaddress *source)
 187 {
 188         if (ipaddress == NULL || source == NULL)
 189                 return;
 190
 191         ipaddress->family = source->family;
 192         ipaddress->prefixlen = source->prefixlen;
 193
 194         g_free(ipaddress->local);
 195         ipaddress->local = g_strdup(source->local);
 196 }