net/bluetooth/bnep/sock.c

   1 /*
   2    BNEP implementation for Linux Bluetooth stack (BlueZ).
   3    Copyright (C) 2001-2002 Inventel Systemes
   4    Written 2001-2002 by
   5         David Libault  <david.libault@inventel.fr>
   6
   7    Copyright (C) 2002 Maxim Krasnyansky <maxk@qualcomm.com>
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License version 2 as
  11    published by the Free Software Foundation;
  12
  13    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  14    OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  15    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
  16    IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
  17    CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
  18    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  19    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  20    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  21
  22    ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
  23    COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
  24    SOFTWARE IS DISCLAIMED.
  25 */
  26
  27 /*
  28  * $Id: sock.c,v 1.4 2002/08/04 21:23:58 maxk Exp $
  29  */
  30
  31 #include <linux/config.h>
  32 #include <linux/module.h>
  33
  34 #include <linux/types.h>
  35 #include <linux/capability.h>
  36 #include <linux/errno.h>
  37 #include <linux/kernel.h>
  38 #include <linux/sched.h>
  39 #include <linux/slab.h>
  40 #include <linux/poll.h>
  41 #include <linux/fcntl.h>
  42 #include <linux/skbuff.h>
  43 #include <linux/socket.h>
  44 #include <linux/ioctl.h>
  45 #include <linux/file.h>
  46 #include <linux/init.h>
  47 #include <net/sock.h>
  48
  49 #include <asm/system.h>
  50 #include <asm/uaccess.h>
  51
  52 #include "bnep.h"
  53
  54 #ifndef CONFIG_BT_BNEP_DEBUG
  55 #undef  BT_DBG
  56 #define BT_DBG( A... )
  57 #endif
  58
  59 static int bnep_sock_release(struct socket *sock)
  60 {
  61         struct sock *sk = sock->sk;
  62
  63         BT_DBG("sock %p sk %p", sock, sk);
  64
  65         if (!sk)
  66                 return 0;
  67
  68         sock_orphan(sk);
  69         sock_put(sk);
  70         return 0;
  71 }
  72
  73 static int bnep_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
  74 {
  75         struct bnep_connlist_req cl;
  76         struct bnep_connadd_req  ca;
  77         struct bnep_conndel_req  cd;
  78         struct bnep_conninfo ci;
  79         struct socket *nsock;
  80         void __user *argp = (void __user *)arg;
  81         int err;
  82
  83         BT_DBG("cmd %x arg %lx", cmd, arg);
  84
  85         switch (cmd) {
  86         case BNEPCONNADD:
  87                 if (!capable(CAP_NET_ADMIN))
  88                         return -EACCES;
  89
  90                 if (copy_from_user(&ca, argp, sizeof(ca)))
  91                         return -EFAULT;
  92
  93                 nsock = sockfd_lookup(ca.sock, &err);
  94                 if (!nsock)
  95                         return err;
  96
  97                 if (nsock->sk->sk_state != BT_CONNECTED) {
  98                         fput(nsock->file);
  99                         return -EBADFD;
 100                 }
 101
 102                 err = bnep_add_connection(&ca, nsock);
 103                 if (!err) {
 104                         if (copy_to_user(argp, &ca, sizeof(ca)))
 105                                 err = -EFAULT;
 106                 } else
 107                         fput(nsock->file);
 108
 109                 return err;
 110
 111         case BNEPCONNDEL:
 112                 if (!capable(CAP_NET_ADMIN))
 113                         return -EACCES;
 114
 115                 if (copy_from_user(&cd, argp, sizeof(cd)))
 116                         return -EFAULT;
 117
 118                 return bnep_del_connection(&cd);
 119
 120         case BNEPGETCONNLIST:
 121                 if (copy_from_user(&cl, argp, sizeof(cl)))
 122                         return -EFAULT;
 123
 124                 if (cl.cnum <= 0)
 125                         return -EINVAL;
 126
 127                 err = bnep_get_connlist(&cl);
 128                 if (!err && copy_to_user(argp, &cl, sizeof(cl)))
 129                         return -EFAULT;
 130
 131                 return err;
 132
 133         case BNEPGETCONNINFO:
 134                 if (copy_from_user(&ci, argp, sizeof(ci)))
 135                         return -EFAULT;
 136
 137                 err = bnep_get_conninfo(&ci);
 138                 if (!err && copy_to_user(argp, &ci, sizeof(ci)))
 139                         return -EFAULT;
 140
 141                 return err;
 142
 143         default:
 144                 return -EINVAL;
 145         }
 146
 147         return 0;
 148 }
 149
 150 static const struct proto_ops bnep_sock_ops = {
 151         .family     = PF_BLUETOOTH,
 152         .owner      = THIS_MODULE,
 153         .release    = bnep_sock_release,
 154         .ioctl      = bnep_sock_ioctl,
 155         .bind       = sock_no_bind,
 156         .getname    = sock_no_getname,
 157         .sendmsg    = sock_no_sendmsg,
 158         .recvmsg    = sock_no_recvmsg,
 159         .poll       = sock_no_poll,
 160         .listen     = sock_no_listen,
 161         .shutdown   = sock_no_shutdown,
 162         .setsockopt = sock_no_setsockopt,
 163         .getsockopt = sock_no_getsockopt,
 164         .connect    = sock_no_connect,
 165         .socketpair = sock_no_socketpair,
 166         .accept     = sock_no_accept,
 167         .mmap       = sock_no_mmap
 168 };
 169
 170 static struct proto bnep_proto = {
 171         .name           = "BNEP",
 172         .owner          = THIS_MODULE,
 173         .obj_size       = sizeof(struct bt_sock)
 174 };
 175
 176 static int bnep_sock_create(struct socket *sock, int protocol)
 177 {
 178         struct sock *sk;
 179
 180         BT_DBG("sock %p", sock);
 181
 182         if (sock->type != SOCK_RAW)
 183                 return -ESOCKTNOSUPPORT;
 184
 185         sk = sk_alloc(PF_BLUETOOTH, GFP_KERNEL, &bnep_proto, 1);
 186         if (!sk)
 187                 return -ENOMEM;
 188
 189         sock_init_data(sock, sk);
 190
 191         sock->ops = &bnep_sock_ops;
 192
 193         sock->state = SS_UNCONNECTED;
 194
 195         sock_reset_flag(sk, SOCK_ZAPPED);
 196
 197         sk->sk_protocol = protocol;
 198         sk->sk_state    = BT_OPEN;
 199
 200         return 0;
 201 }
 202
 203 static struct net_proto_family bnep_sock_family_ops = {
 204         .family = PF_BLUETOOTH,
 205         .owner  = THIS_MODULE,
 206         .create = bnep_sock_create
 207 };
 208
 209 int __init bnep_sock_init(void)
 210 {
 211         int err;
 212
 213         err = proto_register(&bnep_proto, 0);
 214         if (err < 0)
 215                 return err;
 216
 217         err = bt_sock_register(BTPROTO_BNEP, &bnep_sock_family_ops);
 218         if (err < 0)
 219                 goto error;
 220
 221         return 0;
 222
 223 error:
 224         BT_ERR("Can't register BNEP socket");
 225         proto_unregister(&bnep_proto);
 226         return err;
 227 }
 228
 229 int __exit bnep_sock_cleanup(void)
 230 {
 231         if (bt_sock_unregister(BTPROTO_BNEP) < 0)
 232                 BT_ERR("Can't unregister BNEP socket");
 233
 234         proto_unregister(&bnep_proto);
 235
 236         return 0;
 237 }