src/bridge.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2012  Intel Corporation. All rights reserved.
   6  *  Copyright (C) 2012  BMW Car IT GmbH. All rights reserved.
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License version 2 as
  10  *  published by the Free Software Foundation.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, write to the Free Software
  19  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  20  *
  21  */
  22
  23 #ifdef HAVE_CONFIG_H
  24 #include <config.h>
  25 #endif
  26
  27 #include <errno.h>
  28 #include <sys/types.h>
  29 #include <sys/stat.h>
  30 #include <unistd.h>
  31 #include <stdio.h>
  32 #include <sys/ioctl.h>
  33 #include <net/if.h>
  34 #include <linux/sockios.h>
  35 #include <string.h>
  36 #include <fcntl.h>
  37 #include <linux/if_tun.h>
  38
  39 #include "connman.h"
  40
  41 static int set_forward_delay(const char *name, unsigned int delay)
  42 {
  43         FILE *f;
  44         char *forward_delay_path;
  45
  46         forward_delay_path =
  47                 g_strdup_printf("/sys/class/net/%s/bridge/forward_delay", name);
  48
  49         if (forward_delay_path == NULL)
  50                 return -ENOMEM;
  51
  52         f = fopen(forward_delay_path, "r+");
  53
  54         g_free(forward_delay_path);
  55
  56         if (f == NULL)
  57                 return -errno;
  58
  59         fprintf(f, "%d", delay);
  60
  61         fclose(f);
  62
  63         return 0;
  64 }
  65
  66 int __connman_bridge_create(const char *name)
  67 {
  68         int sk, err;
  69
  70         DBG("name %s", name);
  71
  72         sk = socket(AF_INET, SOCK_STREAM | SOCK_CLOEXEC, 0);
  73         if (sk < 0)
  74                 return -EOPNOTSUPP;
  75
  76         if (ioctl(sk, SIOCBRADDBR, name) == -1) {
  77                 err = -errno;
  78                 if (err != -EEXIST)
  79                         return -EOPNOTSUPP;
  80         }
  81
  82         err = set_forward_delay(name, 0);
  83
  84         if (err < 0)
  85                 ioctl(sk, SIOCBRDELBR, name);
  86
  87         close(sk);
  88
  89         return err;
  90 }
  91
  92 int __connman_bridge_remove(const char *name)
  93 {
  94         int sk, err;
  95
  96         DBG("name %s", name);
  97
  98         sk = socket(AF_INET, SOCK_STREAM | SOCK_CLOEXEC, 0);
  99         if (sk < 0)
 100                 return -EOPNOTSUPP;
 101
 102         err = ioctl(sk, SIOCBRDELBR, name);
 103
 104         close(sk);
 105
 106         if (err < 0)
 107                 return -EOPNOTSUPP;
 108
 109         return 0;
 110 }
 111
 112 int __connman_bridge_enable(const char *name, const char *gateway,
 113                                 const char *broadcast)
 114 {
 115         int err, index;
 116
 117         index = connman_inet_ifindex(name);
 118         if (index < 0)
 119                 return index;
 120
 121         err = __connman_inet_modify_address(RTM_NEWADDR,
 122                         NLM_F_REPLACE | NLM_F_ACK, index, AF_INET,
 123                                         gateway, NULL, 24, broadcast);
 124         if (err < 0)
 125                 return err;
 126
 127         return connman_inet_ifup(index);
 128 }
 129
 130 int __connman_bridge_disable(const char *name)
 131 {
 132         int index;
 133
 134         index = connman_inet_ifindex(name);
 135         if (index < 0)
 136                 return index;
 137
 138         return connman_inet_ifdown(index);
 139 }