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/module.h> 28 29 #include <linux/types.h> 30 #include <linux/capability.h> 31 #include <linux/errno.h> 32 #include <linux/kernel.h> 33 #include <linux/slab.h> 34 #include <linux/poll.h> 35 #include <linux/fcntl.h> 36 #include <linux/skbuff.h> 37 #include <linux/socket.h> 38 #include <linux/ioctl.h> 39 #include <linux/file.h> 40 #include <linux/init.h> 41 #include <linux/compat.h> 42 #include <net/sock.h> 43 44 #include <asm/system.h> 45 #include <asm/uaccess.h> 46 47 #include "bnep.h" 48 49 #ifndef CONFIG_BT_BNEP_DEBUG 50 #undef BT_DBG 51 #define BT_DBG( A... ) 52 #endif 53 54 static int bnep_sock_release(struct socket *sock) 55 { 56 struct sock *sk = sock->sk; 57 58 BT_DBG("sock %p sk %p", sock, sk); 59 60 if (!sk) 61 return 0; 62 63 sock_orphan(sk); 64 sock_put(sk); 65 return 0; 66 } 67 68 static int bnep_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 69 { 70 struct bnep_connlist_req cl; 71 struct bnep_connadd_req ca; 72 struct bnep_conndel_req cd; 73 struct bnep_conninfo ci; 74 struct socket *nsock; 75 void __user *argp = (void __user *)arg; 76 int err; 77 78 BT_DBG("cmd %x arg %lx", cmd, arg); 79 80 switch (cmd) { 81 case BNEPCONNADD: 82 if (!capable(CAP_NET_ADMIN)) 83 return -EACCES; 84 85 if (copy_from_user(&ca, argp, sizeof(ca))) 86 return -EFAULT; 87 88 nsock = sockfd_lookup(ca.sock, &err); 89 if (!nsock) 90 return err; 91 92 if (nsock->sk->sk_state != BT_CONNECTED) { 93 sockfd_put(nsock); 94 return -EBADFD; 95 } 96 97 err = bnep_add_connection(&ca, nsock); 98 if (!err) { 99 if (copy_to_user(argp, &ca, sizeof(ca))) 100 err = -EFAULT; 101 } else 102 sockfd_put(nsock); 103 104 return err; 105 106 case BNEPCONNDEL: 107 if (!capable(CAP_NET_ADMIN)) 108 return -EACCES; 109 110 if (copy_from_user(&cd, argp, sizeof(cd))) 111 return -EFAULT; 112 113 return bnep_del_connection(&cd); 114 115 case BNEPGETCONNLIST: 116 if (copy_from_user(&cl, argp, sizeof(cl))) 117 return -EFAULT; 118 119 if (cl.cnum <= 0) 120 return -EINVAL; 121 122 err = bnep_get_connlist(&cl); 123 if (!err && copy_to_user(argp, &cl, sizeof(cl))) 124 return -EFAULT; 125 126 return err; 127 128 case BNEPGETCONNINFO: 129 if (copy_from_user(&ci, argp, sizeof(ci))) 130 return -EFAULT; 131 132 err = bnep_get_conninfo(&ci); 133 if (!err && copy_to_user(argp, &ci, sizeof(ci))) 134 return -EFAULT; 135 136 return err; 137 138 default: 139 return -EINVAL; 140 } 141 142 return 0; 143 } 144 145 #ifdef CONFIG_COMPAT 146 static int bnep_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 147 { 148 if (cmd == BNEPGETCONNLIST) { 149 struct bnep_connlist_req cl; 150 uint32_t uci; 151 int err; 152 153 if (get_user(cl.cnum, (uint32_t __user *) arg) || 154 get_user(uci, (u32 __user *) (arg + 4))) 155 return -EFAULT; 156 157 cl.ci = compat_ptr(uci); 158 159 if (cl.cnum <= 0) 160 return -EINVAL; 161 162 err = bnep_get_connlist(&cl); 163 164 if (!err && put_user(cl.cnum, (uint32_t __user *) arg)) 165 err = -EFAULT; 166 167 return err; 168 } 169 170 return bnep_sock_ioctl(sock, cmd, arg); 171 } 172 #endif 173 174 static const struct proto_ops bnep_sock_ops = { 175 .family = PF_BLUETOOTH, 176 .owner = THIS_MODULE, 177 .release = bnep_sock_release, 178 .ioctl = bnep_sock_ioctl, 179 #ifdef CONFIG_COMPAT 180 .compat_ioctl = bnep_sock_compat_ioctl, 181 #endif 182 .bind = sock_no_bind, 183 .getname = sock_no_getname, 184 .sendmsg = sock_no_sendmsg, 185 .recvmsg = sock_no_recvmsg, 186 .poll = sock_no_poll, 187 .listen = sock_no_listen, 188 .shutdown = sock_no_shutdown, 189 .setsockopt = sock_no_setsockopt, 190 .getsockopt = sock_no_getsockopt, 191 .connect = sock_no_connect, 192 .socketpair = sock_no_socketpair, 193 .accept = sock_no_accept, 194 .mmap = sock_no_mmap 195 }; 196 197 static struct proto bnep_proto = { 198 .name = "BNEP", 199 .owner = THIS_MODULE, 200 .obj_size = sizeof(struct bt_sock) 201 }; 202 203 static int bnep_sock_create(struct net *net, struct socket *sock, int protocol) 204 { 205 struct sock *sk; 206 207 BT_DBG("sock %p", sock); 208 209 if (sock->type != SOCK_RAW) 210 return -ESOCKTNOSUPPORT; 211 212 sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &bnep_proto); 213 if (!sk) 214 return -ENOMEM; 215 216 sock_init_data(sock, sk); 217 218 sock->ops = &bnep_sock_ops; 219 220 sock->state = SS_UNCONNECTED; 221 222 sock_reset_flag(sk, SOCK_ZAPPED); 223 224 sk->sk_protocol = protocol; 225 sk->sk_state = BT_OPEN; 226 227 return 0; 228 } 229 230 static struct net_proto_family bnep_sock_family_ops = { 231 .family = PF_BLUETOOTH, 232 .owner = THIS_MODULE, 233 .create = bnep_sock_create 234 }; 235 236 int __init bnep_sock_init(void) 237 { 238 int err; 239 240 err = proto_register(&bnep_proto, 0); 241 if (err < 0) 242 return err; 243 244 err = bt_sock_register(BTPROTO_BNEP, &bnep_sock_family_ops); 245 if (err < 0) 246 goto error; 247 248 return 0; 249 250 error: 251 BT_ERR("Can't register BNEP socket"); 252 proto_unregister(&bnep_proto); 253 return err; 254 } 255 256 void __exit bnep_sock_cleanup(void) 257 { 258 if (bt_sock_unregister(BTPROTO_BNEP) < 0) 259 BT_ERR("Can't unregister BNEP socket"); 260 261 proto_unregister(&bnep_proto); 262 } 263