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 struct bt_sock_list bnep_sk_list = { 33 .lock = __RW_LOCK_UNLOCKED(bnep_sk_list.lock) 34 }; 35 36 static int bnep_sock_release(struct socket *sock) 37 { 38 struct sock *sk = sock->sk; 39 40 BT_DBG("sock %p sk %p", sock, sk); 41 42 if (!sk) 43 return 0; 44 45 bt_sock_unlink(&bnep_sk_list, sk); 46 47 sock_orphan(sk); 48 sock_put(sk); 49 return 0; 50 } 51 52 static int bnep_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 53 { 54 struct bnep_connlist_req cl; 55 struct bnep_connadd_req ca; 56 struct bnep_conndel_req cd; 57 struct bnep_conninfo ci; 58 struct socket *nsock; 59 void __user *argp = (void __user *)arg; 60 int err; 61 62 BT_DBG("cmd %x arg %lx", cmd, arg); 63 64 switch (cmd) { 65 case BNEPCONNADD: 66 if (!capable(CAP_NET_ADMIN)) 67 return -EPERM; 68 69 if (copy_from_user(&ca, argp, sizeof(ca))) 70 return -EFAULT; 71 72 nsock = sockfd_lookup(ca.sock, &err); 73 if (!nsock) 74 return err; 75 76 if (nsock->sk->sk_state != BT_CONNECTED) { 77 sockfd_put(nsock); 78 return -EBADFD; 79 } 80 ca.device[sizeof(ca.device)-1] = 0; 81 82 err = bnep_add_connection(&ca, nsock); 83 if (!err) { 84 if (copy_to_user(argp, &ca, sizeof(ca))) 85 err = -EFAULT; 86 } else 87 sockfd_put(nsock); 88 89 return err; 90 91 case BNEPCONNDEL: 92 if (!capable(CAP_NET_ADMIN)) 93 return -EPERM; 94 95 if (copy_from_user(&cd, argp, sizeof(cd))) 96 return -EFAULT; 97 98 return bnep_del_connection(&cd); 99 100 case BNEPGETCONNLIST: 101 if (copy_from_user(&cl, argp, sizeof(cl))) 102 return -EFAULT; 103 104 if (cl.cnum <= 0) 105 return -EINVAL; 106 107 err = bnep_get_connlist(&cl); 108 if (!err && copy_to_user(argp, &cl, sizeof(cl))) 109 return -EFAULT; 110 111 return err; 112 113 case BNEPGETCONNINFO: 114 if (copy_from_user(&ci, argp, sizeof(ci))) 115 return -EFAULT; 116 117 err = bnep_get_conninfo(&ci); 118 if (!err && copy_to_user(argp, &ci, sizeof(ci))) 119 return -EFAULT; 120 121 return err; 122 123 default: 124 return -EINVAL; 125 } 126 127 return 0; 128 } 129 130 #ifdef CONFIG_COMPAT 131 static int bnep_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 132 { 133 if (cmd == BNEPGETCONNLIST) { 134 struct bnep_connlist_req cl; 135 u32 uci; 136 int err; 137 138 if (get_user(cl.cnum, (u32 __user *) arg) || 139 get_user(uci, (u32 __user *) (arg + 4))) 140 return -EFAULT; 141 142 cl.ci = compat_ptr(uci); 143 144 if (cl.cnum <= 0) 145 return -EINVAL; 146 147 err = bnep_get_connlist(&cl); 148 149 if (!err && put_user(cl.cnum, (u32 __user *) arg)) 150 err = -EFAULT; 151 152 return err; 153 } 154 155 return bnep_sock_ioctl(sock, cmd, arg); 156 } 157 #endif 158 159 static const struct proto_ops bnep_sock_ops = { 160 .family = PF_BLUETOOTH, 161 .owner = THIS_MODULE, 162 .release = bnep_sock_release, 163 .ioctl = bnep_sock_ioctl, 164 #ifdef CONFIG_COMPAT 165 .compat_ioctl = bnep_sock_compat_ioctl, 166 #endif 167 .bind = sock_no_bind, 168 .getname = sock_no_getname, 169 .sendmsg = sock_no_sendmsg, 170 .recvmsg = sock_no_recvmsg, 171 .poll = sock_no_poll, 172 .listen = sock_no_listen, 173 .shutdown = sock_no_shutdown, 174 .setsockopt = sock_no_setsockopt, 175 .getsockopt = sock_no_getsockopt, 176 .connect = sock_no_connect, 177 .socketpair = sock_no_socketpair, 178 .accept = sock_no_accept, 179 .mmap = sock_no_mmap 180 }; 181 182 static struct proto bnep_proto = { 183 .name = "BNEP", 184 .owner = THIS_MODULE, 185 .obj_size = sizeof(struct bt_sock) 186 }; 187 188 static int bnep_sock_create(struct net *net, struct socket *sock, int protocol, 189 int kern) 190 { 191 struct sock *sk; 192 193 BT_DBG("sock %p", sock); 194 195 if (sock->type != SOCK_RAW) 196 return -ESOCKTNOSUPPORT; 197 198 sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &bnep_proto); 199 if (!sk) 200 return -ENOMEM; 201 202 sock_init_data(sock, sk); 203 204 sock->ops = &bnep_sock_ops; 205 206 sock->state = SS_UNCONNECTED; 207 208 sock_reset_flag(sk, SOCK_ZAPPED); 209 210 sk->sk_protocol = protocol; 211 sk->sk_state = BT_OPEN; 212 213 bt_sock_link(&bnep_sk_list, sk); 214 return 0; 215 } 216 217 static const struct net_proto_family bnep_sock_family_ops = { 218 .family = PF_BLUETOOTH, 219 .owner = THIS_MODULE, 220 .create = bnep_sock_create 221 }; 222 223 int __init bnep_sock_init(void) 224 { 225 int err; 226 227 err = proto_register(&bnep_proto, 0); 228 if (err < 0) 229 return err; 230 231 err = bt_sock_register(BTPROTO_BNEP, &bnep_sock_family_ops); 232 if (err < 0) { 233 BT_ERR("Can't register BNEP socket"); 234 goto error; 235 } 236 237 err = bt_procfs_init(&init_net, "bnep", &bnep_sk_list, NULL); 238 if (err < 0) { 239 BT_ERR("Failed to create BNEP proc file"); 240 bt_sock_unregister(BTPROTO_BNEP); 241 goto error; 242 } 243 244 BT_INFO("BNEP socket layer initialized"); 245 246 return 0; 247 248 error: 249 proto_unregister(&bnep_proto); 250 return err; 251 } 252 253 void __exit bnep_sock_cleanup(void) 254 { 255 bt_procfs_cleanup(&init_net, "bnep"); 256 bt_sock_unregister(BTPROTO_BNEP); 257 proto_unregister(&bnep_proto); 258 } 259