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/module.h>
  32
  33 #include <linux/types.h>
  34 #include <linux/capability.h>
  35 #include <linux/errno.h>
  36 #include <linux/kernel.h>
  37 #include <linux/sched.h>
  38 #include <linux/slab.h>
  39 #include <linux/poll.h>
  40 #include <linux/fcntl.h>
  41 #include <linux/skbuff.h>
  42 #include <linux/socket.h>
  43 #include <linux/ioctl.h>
  44 #include <linux/file.h>
  45 #include <linux/init.h>
  46 #include <linux/compat.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 #ifdef CONFIG_COMPAT
 151 static int bnep_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
 152 {
 153         if (cmd == BNEPGETCONNLIST) {
 154                 struct bnep_connlist_req cl;
 155                 uint32_t uci;
 156                 int err;
 157
 158                 if (get_user(cl.cnum, (uint32_t __user *) arg) ||
 159                                 get_user(uci, (u32 __user *) (arg + 4)))
 160                         return -EFAULT;
 161
 162                 cl.ci = compat_ptr(uci);
 163
 164                 if (cl.cnum <= 0)
 165                         return -EINVAL;
 166
 167                 err = bnep_get_connlist(&cl);
 168
 169                 if (!err && put_user(cl.cnum, (uint32_t __user *) arg))
 170                         err = -EFAULT;
 171
 172                 return err;
 173         }
 174
 175         return bnep_sock_ioctl(sock, cmd, arg);
 176 }
 177 #endif
 178
 179 static const struct proto_ops bnep_sock_ops = {
 180         .family         = PF_BLUETOOTH,
 181         .owner          = THIS_MODULE,
 182         .release        = bnep_sock_release,
 183         .ioctl          = bnep_sock_ioctl,
 184 #ifdef CONFIG_COMPAT
 185         .compat_ioctl   = bnep_sock_compat_ioctl,
 186 #endif
 187         .bind           = sock_no_bind,
 188         .getname        = sock_no_getname,
 189         .sendmsg        = sock_no_sendmsg,
 190         .recvmsg        = sock_no_recvmsg,
 191         .poll           = sock_no_poll,
 192         .listen         = sock_no_listen,
 193         .shutdown       = sock_no_shutdown,
 194         .setsockopt     = sock_no_setsockopt,
 195         .getsockopt     = sock_no_getsockopt,
 196         .connect        = sock_no_connect,
 197         .socketpair     = sock_no_socketpair,
 198         .accept         = sock_no_accept,
 199         .mmap           = sock_no_mmap
 200 };
 201
 202 static struct proto bnep_proto = {
 203         .name           = "BNEP",
 204         .owner          = THIS_MODULE,
 205         .obj_size       = sizeof(struct bt_sock)
 206 };
 207
 208 static int bnep_sock_create(struct socket *sock, int protocol)
 209 {
 210         struct sock *sk;
 211
 212         BT_DBG("sock %p", sock);
 213
 214         if (sock->type != SOCK_RAW)
 215                 return -ESOCKTNOSUPPORT;
 216
 217         sk = sk_alloc(PF_BLUETOOTH, GFP_ATOMIC, &bnep_proto, 1);
 218         if (!sk)
 219                 return -ENOMEM;
 220
 221         sock_init_data(sock, sk);
 222
 223         sock->ops = &bnep_sock_ops;
 224
 225         sock->state = SS_UNCONNECTED;
 226
 227         sock_reset_flag(sk, SOCK_ZAPPED);
 228
 229         sk->sk_protocol = protocol;
 230         sk->sk_state    = BT_OPEN;
 231
 232         return 0;
 233 }
 234
 235 static struct net_proto_family bnep_sock_family_ops = {
 236         .family = PF_BLUETOOTH,
 237         .owner  = THIS_MODULE,
 238         .create = bnep_sock_create
 239 };
 240
 241 int __init bnep_sock_init(void)
 242 {
 243         int err;
 244
 245         err = proto_register(&bnep_proto, 0);
 246         if (err < 0)
 247                 return err;
 248
 249         err = bt_sock_register(BTPROTO_BNEP, &bnep_sock_family_ops);
 250         if (err < 0)
 251                 goto error;
 252
 253         return 0;
 254
 255 error:
 256         BT_ERR("Can't register BNEP socket");
 257         proto_unregister(&bnep_proto);
 258         return err;
 259 }
 260
 261 int __exit bnep_sock_cleanup(void)
 262 {
 263         if (bt_sock_unregister(BTPROTO_BNEP) < 0)
 264                 BT_ERR("Can't unregister BNEP socket");
 265
 266         proto_unregister(&bnep_proto);
 267
 268         return 0;
 269 }