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/poll.h> 34 #include <linux/fcntl.h> 35 #include <linux/skbuff.h> 36 #include <linux/socket.h> 37 #include <linux/ioctl.h> 38 #include <linux/file.h> 39 #include <linux/init.h> 40 #include <linux/compat.h> 41 #include <linux/gfp.h> 42 #include <linux/uaccess.h> 43 #include <net/sock.h> 44 45 #include <asm/system.h> 46 47 #include "bnep.h" 48 49 static int bnep_sock_release(struct socket *sock) 50 { 51 struct sock *sk = sock->sk; 52 53 BT_DBG("sock %p sk %p", sock, sk); 54 55 if (!sk) 56 return 0; 57 58 sock_orphan(sk); 59 sock_put(sk); 60 return 0; 61 } 62 63 static int bnep_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 64 { 65 struct bnep_connlist_req cl; 66 struct bnep_connadd_req ca; 67 struct bnep_conndel_req cd; 68 struct bnep_conninfo ci; 69 struct socket *nsock; 70 void __user *argp = (void __user *)arg; 71 int err; 72 73 BT_DBG("cmd %x arg %lx", cmd, arg); 74 75 switch (cmd) { 76 case BNEPCONNADD: 77 if (!capable(CAP_NET_ADMIN)) 78 return -EACCES; 79 80 if (copy_from_user(&ca, argp, sizeof(ca))) 81 return -EFAULT; 82 83 nsock = sockfd_lookup(ca.sock, &err); 84 if (!nsock) 85 return err; 86 87 if (nsock->sk->sk_state != BT_CONNECTED) { 88 sockfd_put(nsock); 89 return -EBADFD; 90 } 91 ca.device[sizeof(ca.device)-1] = 0; 92 93 err = bnep_add_connection(&ca, nsock); 94 if (!err) { 95 if (copy_to_user(argp, &ca, sizeof(ca))) 96 err = -EFAULT; 97 } else 98 sockfd_put(nsock); 99 100 return err; 101 102 case BNEPCONNDEL: 103 if (!capable(CAP_NET_ADMIN)) 104 return -EACCES; 105 106 if (copy_from_user(&cd, argp, sizeof(cd))) 107 return -EFAULT; 108 109 return bnep_del_connection(&cd); 110 111 case BNEPGETCONNLIST: 112 if (copy_from_user(&cl, argp, sizeof(cl))) 113 return -EFAULT; 114 115 if (cl.cnum <= 0) 116 return -EINVAL; 117 118 err = bnep_get_connlist(&cl); 119 if (!err && copy_to_user(argp, &cl, sizeof(cl))) 120 return -EFAULT; 121 122 return err; 123 124 case BNEPGETCONNINFO: 125 if (copy_from_user(&ci, argp, sizeof(ci))) 126 return -EFAULT; 127 128 err = bnep_get_conninfo(&ci); 129 if (!err && copy_to_user(argp, &ci, sizeof(ci))) 130 return -EFAULT; 131 132 return err; 133 134 default: 135 return -EINVAL; 136 } 137 138 return 0; 139 } 140 141 #ifdef CONFIG_COMPAT 142 static int bnep_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 143 { 144 if (cmd == BNEPGETCONNLIST) { 145 struct bnep_connlist_req cl; 146 uint32_t uci; 147 int err; 148 149 if (get_user(cl.cnum, (uint32_t __user *) arg) || 150 get_user(uci, (u32 __user *) (arg + 4))) 151 return -EFAULT; 152 153 cl.ci = compat_ptr(uci); 154 155 if (cl.cnum <= 0) 156 return -EINVAL; 157 158 err = bnep_get_connlist(&cl); 159 160 if (!err && put_user(cl.cnum, (uint32_t __user *) arg)) 161 err = -EFAULT; 162 163 return err; 164 } 165 166 return bnep_sock_ioctl(sock, cmd, arg); 167 } 168 #endif 169 170 static const struct proto_ops bnep_sock_ops = { 171 .family = PF_BLUETOOTH, 172 .owner = THIS_MODULE, 173 .release = bnep_sock_release, 174 .ioctl = bnep_sock_ioctl, 175 #ifdef CONFIG_COMPAT 176 .compat_ioctl = bnep_sock_compat_ioctl, 177 #endif 178 .bind = sock_no_bind, 179 .getname = sock_no_getname, 180 .sendmsg = sock_no_sendmsg, 181 .recvmsg = sock_no_recvmsg, 182 .poll = sock_no_poll, 183 .listen = sock_no_listen, 184 .shutdown = sock_no_shutdown, 185 .setsockopt = sock_no_setsockopt, 186 .getsockopt = sock_no_getsockopt, 187 .connect = sock_no_connect, 188 .socketpair = sock_no_socketpair, 189 .accept = sock_no_accept, 190 .mmap = sock_no_mmap 191 }; 192 193 static struct proto bnep_proto = { 194 .name = "BNEP", 195 .owner = THIS_MODULE, 196 .obj_size = sizeof(struct bt_sock) 197 }; 198 199 static int bnep_sock_create(struct net *net, struct socket *sock, int protocol, 200 int kern) 201 { 202 struct sock *sk; 203 204 BT_DBG("sock %p", sock); 205 206 if (sock->type != SOCK_RAW) 207 return -ESOCKTNOSUPPORT; 208 209 sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &bnep_proto); 210 if (!sk) 211 return -ENOMEM; 212 213 sock_init_data(sock, sk); 214 215 sock->ops = &bnep_sock_ops; 216 217 sock->state = SS_UNCONNECTED; 218 219 sock_reset_flag(sk, SOCK_ZAPPED); 220 221 sk->sk_protocol = protocol; 222 sk->sk_state = BT_OPEN; 223 224 return 0; 225 } 226 227 static const struct net_proto_family bnep_sock_family_ops = { 228 .family = PF_BLUETOOTH, 229 .owner = THIS_MODULE, 230 .create = bnep_sock_create 231 }; 232 233 int __init bnep_sock_init(void) 234 { 235 int err; 236 237 err = proto_register(&bnep_proto, 0); 238 if (err < 0) 239 return err; 240 241 err = bt_sock_register(BTPROTO_BNEP, &bnep_sock_family_ops); 242 if (err < 0) 243 goto error; 244 245 return 0; 246 247 error: 248 BT_ERR("Can't register BNEP socket"); 249 proto_unregister(&bnep_proto); 250 return err; 251 } 252 253 void __exit bnep_sock_cleanup(void) 254 { 255 if (bt_sock_unregister(BTPROTO_BNEP) < 0) 256 BT_ERR("Can't unregister BNEP socket"); 257 258 proto_unregister(&bnep_proto); 259 } 260