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 __u32 supp_feat = BIT(BNEP_SETUP_RESPONSE); 61 int err; 62 63 BT_DBG("cmd %x arg %lx", cmd, arg); 64 65 switch (cmd) { 66 case BNEPCONNADD: 67 if (!capable(CAP_NET_ADMIN)) 68 return -EPERM; 69 70 if (copy_from_user(&ca, argp, sizeof(ca))) 71 return -EFAULT; 72 73 nsock = sockfd_lookup(ca.sock, &err); 74 if (!nsock) 75 return err; 76 77 if (nsock->sk->sk_state != BT_CONNECTED) { 78 sockfd_put(nsock); 79 return -EBADFD; 80 } 81 ca.device[sizeof(ca.device)-1] = 0; 82 83 err = bnep_add_connection(&ca, nsock); 84 if (!err) { 85 if (copy_to_user(argp, &ca, sizeof(ca))) 86 err = -EFAULT; 87 } else 88 sockfd_put(nsock); 89 90 return err; 91 92 case BNEPCONNDEL: 93 if (!capable(CAP_NET_ADMIN)) 94 return -EPERM; 95 96 if (copy_from_user(&cd, argp, sizeof(cd))) 97 return -EFAULT; 98 99 return bnep_del_connection(&cd); 100 101 case BNEPGETCONNLIST: 102 if (copy_from_user(&cl, argp, sizeof(cl))) 103 return -EFAULT; 104 105 if (cl.cnum <= 0) 106 return -EINVAL; 107 108 err = bnep_get_connlist(&cl); 109 if (!err && copy_to_user(argp, &cl, sizeof(cl))) 110 return -EFAULT; 111 112 return err; 113 114 case BNEPGETCONNINFO: 115 if (copy_from_user(&ci, argp, sizeof(ci))) 116 return -EFAULT; 117 118 err = bnep_get_conninfo(&ci); 119 if (!err && copy_to_user(argp, &ci, sizeof(ci))) 120 return -EFAULT; 121 122 return err; 123 124 case BNEPGETSUPPFEAT: 125 if (copy_to_user(argp, &supp_feat, sizeof(supp_feat))) 126 return -EFAULT; 127 128 return 0; 129 130 default: 131 return -EINVAL; 132 } 133 134 return 0; 135 } 136 137 #ifdef CONFIG_COMPAT 138 static int bnep_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 139 { 140 if (cmd == BNEPGETCONNLIST) { 141 struct bnep_connlist_req cl; 142 u32 uci; 143 int err; 144 145 if (get_user(cl.cnum, (u32 __user *) arg) || 146 get_user(uci, (u32 __user *) (arg + 4))) 147 return -EFAULT; 148 149 cl.ci = compat_ptr(uci); 150 151 if (cl.cnum <= 0) 152 return -EINVAL; 153 154 err = bnep_get_connlist(&cl); 155 156 if (!err && put_user(cl.cnum, (u32 __user *) arg)) 157 err = -EFAULT; 158 159 return err; 160 } 161 162 return bnep_sock_ioctl(sock, cmd, arg); 163 } 164 #endif 165 166 static const struct proto_ops bnep_sock_ops = { 167 .family = PF_BLUETOOTH, 168 .owner = THIS_MODULE, 169 .release = bnep_sock_release, 170 .ioctl = bnep_sock_ioctl, 171 #ifdef CONFIG_COMPAT 172 .compat_ioctl = bnep_sock_compat_ioctl, 173 #endif 174 .bind = sock_no_bind, 175 .getname = sock_no_getname, 176 .sendmsg = sock_no_sendmsg, 177 .recvmsg = sock_no_recvmsg, 178 .listen = sock_no_listen, 179 .shutdown = sock_no_shutdown, 180 .setsockopt = sock_no_setsockopt, 181 .getsockopt = sock_no_getsockopt, 182 .connect = sock_no_connect, 183 .socketpair = sock_no_socketpair, 184 .accept = sock_no_accept, 185 .mmap = sock_no_mmap 186 }; 187 188 static struct proto bnep_proto = { 189 .name = "BNEP", 190 .owner = THIS_MODULE, 191 .obj_size = sizeof(struct bt_sock) 192 }; 193 194 static int bnep_sock_create(struct net *net, struct socket *sock, int protocol, 195 int kern) 196 { 197 struct sock *sk; 198 199 BT_DBG("sock %p", sock); 200 201 if (sock->type != SOCK_RAW) 202 return -ESOCKTNOSUPPORT; 203 204 sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &bnep_proto, kern); 205 if (!sk) 206 return -ENOMEM; 207 208 sock_init_data(sock, sk); 209 210 sock->ops = &bnep_sock_ops; 211 212 sock->state = SS_UNCONNECTED; 213 214 sock_reset_flag(sk, SOCK_ZAPPED); 215 216 sk->sk_protocol = protocol; 217 sk->sk_state = BT_OPEN; 218 219 bt_sock_link(&bnep_sk_list, sk); 220 return 0; 221 } 222 223 static const struct net_proto_family bnep_sock_family_ops = { 224 .family = PF_BLUETOOTH, 225 .owner = THIS_MODULE, 226 .create = bnep_sock_create 227 }; 228 229 int __init bnep_sock_init(void) 230 { 231 int err; 232 233 err = proto_register(&bnep_proto, 0); 234 if (err < 0) 235 return err; 236 237 err = bt_sock_register(BTPROTO_BNEP, &bnep_sock_family_ops); 238 if (err < 0) { 239 BT_ERR("Can't register BNEP socket"); 240 goto error; 241 } 242 243 err = bt_procfs_init(&init_net, "bnep", &bnep_sk_list, NULL); 244 if (err < 0) { 245 BT_ERR("Failed to create BNEP proc file"); 246 bt_sock_unregister(BTPROTO_BNEP); 247 goto error; 248 } 249 250 BT_INFO("BNEP socket layer initialized"); 251 252 return 0; 253 254 error: 255 proto_unregister(&bnep_proto); 256 return err; 257 } 258 259 void __exit bnep_sock_cleanup(void) 260 { 261 bt_procfs_cleanup(&init_net, "bnep"); 262 bt_sock_unregister(BTPROTO_BNEP); 263 proto_unregister(&bnep_proto); 264 } 265