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 #include <linux/export.h>
  28 #include <linux/file.h>
  29
  30 #include "bnep.h"
  31
  32 static int bnep_sock_release(struct socket *sock)
  33 {
  34         struct sock *sk = sock->sk;
  35
  36         BT_DBG("sock %p sk %p", sock, sk);
  37
  38         if (!sk)
  39                 return 0;
  40
  41         sock_orphan(sk);
  42         sock_put(sk);
  43         return 0;
  44 }
  45
  46 static int bnep_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
  47 {
  48         struct bnep_connlist_req cl;
  49         struct bnep_connadd_req  ca;
  50         struct bnep_conndel_req  cd;
  51         struct bnep_conninfo ci;
  52         struct socket *nsock;
  53         void __user *argp = (void __user *)arg;
  54         int err;
  55
  56         BT_DBG("cmd %x arg %lx", cmd, arg);
  57
  58         switch (cmd) {
  59         case BNEPCONNADD:
  60                 if (!capable(CAP_NET_ADMIN))
  61                         return -EACCES;
  62
  63                 if (copy_from_user(&ca, argp, sizeof(ca)))
  64                         return -EFAULT;
  65
  66                 nsock = sockfd_lookup(ca.sock, &err);
  67                 if (!nsock)
  68                         return err;
  69
  70                 if (nsock->sk->sk_state != BT_CONNECTED) {
  71                         sockfd_put(nsock);
  72                         return -EBADFD;
  73                 }
  74                 ca.device[sizeof(ca.device)-1] = 0;
  75
  76                 err = bnep_add_connection(&ca, nsock);
  77                 if (!err) {
  78                         if (copy_to_user(argp, &ca, sizeof(ca)))
  79                                 err = -EFAULT;
  80                 } else
  81                         sockfd_put(nsock);
  82
  83                 return err;
  84
  85         case BNEPCONNDEL:
  86                 if (!capable(CAP_NET_ADMIN))
  87                         return -EACCES;
  88
  89                 if (copy_from_user(&cd, argp, sizeof(cd)))
  90                         return -EFAULT;
  91
  92                 return bnep_del_connection(&cd);
  93
  94         case BNEPGETCONNLIST:
  95                 if (copy_from_user(&cl, argp, sizeof(cl)))
  96                         return -EFAULT;
  97
  98                 if (cl.cnum <= 0)
  99                         return -EINVAL;
 100
 101                 err = bnep_get_connlist(&cl);
 102                 if (!err && copy_to_user(argp, &cl, sizeof(cl)))
 103                         return -EFAULT;
 104
 105                 return err;
 106
 107         case BNEPGETCONNINFO:
 108                 if (copy_from_user(&ci, argp, sizeof(ci)))
 109                         return -EFAULT;
 110
 111                 err = bnep_get_conninfo(&ci);
 112                 if (!err && copy_to_user(argp, &ci, sizeof(ci)))
 113                         return -EFAULT;
 114
 115                 return err;
 116
 117         default:
 118                 return -EINVAL;
 119         }
 120
 121         return 0;
 122 }
 123
 124 #ifdef CONFIG_COMPAT
 125 static int bnep_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
 126 {
 127         if (cmd == BNEPGETCONNLIST) {
 128                 struct bnep_connlist_req cl;
 129                 u32 uci;
 130                 int err;
 131
 132                 if (get_user(cl.cnum, (u32 __user *) arg) ||
 133                                 get_user(uci, (u32 __user *) (arg + 4)))
 134                         return -EFAULT;
 135
 136                 cl.ci = compat_ptr(uci);
 137
 138                 if (cl.cnum <= 0)
 139                         return -EINVAL;
 140
 141                 err = bnep_get_connlist(&cl);
 142
 143                 if (!err && put_user(cl.cnum, (u32 __user *) arg))
 144                         err = -EFAULT;
 145
 146                 return err;
 147         }
 148
 149         return bnep_sock_ioctl(sock, cmd, arg);
 150 }
 151 #endif
 152
 153 static const struct proto_ops bnep_sock_ops = {
 154         .family         = PF_BLUETOOTH,
 155         .owner          = THIS_MODULE,
 156         .release        = bnep_sock_release,
 157         .ioctl          = bnep_sock_ioctl,
 158 #ifdef CONFIG_COMPAT
 159         .compat_ioctl   = bnep_sock_compat_ioctl,
 160 #endif
 161         .bind           = sock_no_bind,
 162         .getname        = sock_no_getname,
 163         .sendmsg        = sock_no_sendmsg,
 164         .recvmsg        = sock_no_recvmsg,
 165         .poll           = sock_no_poll,
 166         .listen         = sock_no_listen,
 167         .shutdown       = sock_no_shutdown,
 168         .setsockopt     = sock_no_setsockopt,
 169         .getsockopt     = sock_no_getsockopt,
 170         .connect        = sock_no_connect,
 171         .socketpair     = sock_no_socketpair,
 172         .accept         = sock_no_accept,
 173         .mmap           = sock_no_mmap
 174 };
 175
 176 static struct proto bnep_proto = {
 177         .name           = "BNEP",
 178         .owner          = THIS_MODULE,
 179         .obj_size       = sizeof(struct bt_sock)
 180 };
 181
 182 static int bnep_sock_create(struct net *net, struct socket *sock, int protocol,
 183                             int kern)
 184 {
 185         struct sock *sk;
 186
 187         BT_DBG("sock %p", sock);
 188
 189         if (sock->type != SOCK_RAW)
 190                 return -ESOCKTNOSUPPORT;
 191
 192         sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &bnep_proto);
 193         if (!sk)
 194                 return -ENOMEM;
 195
 196         sock_init_data(sock, sk);
 197
 198         sock->ops = &bnep_sock_ops;
 199
 200         sock->state = SS_UNCONNECTED;
 201
 202         sock_reset_flag(sk, SOCK_ZAPPED);
 203
 204         sk->sk_protocol = protocol;
 205         sk->sk_state    = BT_OPEN;
 206
 207         return 0;
 208 }
 209
 210 static const struct net_proto_family bnep_sock_family_ops = {
 211         .family = PF_BLUETOOTH,
 212         .owner  = THIS_MODULE,
 213         .create = bnep_sock_create
 214 };
 215
 216 int __init bnep_sock_init(void)
 217 {
 218         int err;
 219
 220         err = proto_register(&bnep_proto, 0);
 221         if (err < 0)
 222                 return err;
 223
 224         err = bt_sock_register(BTPROTO_BNEP, &bnep_sock_family_ops);
 225         if (err < 0)
 226                 goto error;
 227
 228         return 0;
 229
 230 error:
 231         BT_ERR("Can't register BNEP socket");
 232         proto_unregister(&bnep_proto);
 233         return err;
 234 }
 235
 236 void __exit bnep_sock_cleanup(void)
 237 {
 238         if (bt_sock_unregister(BTPROTO_BNEP) < 0)
 239                 BT_ERR("Can't unregister BNEP socket");
 240
 241         proto_unregister(&bnep_proto);
 242 }