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/compat.h> 28 #include <linux/export.h> 29 #include <linux/file.h> 30 31 #include "bnep.h" 32 33 static struct bt_sock_list bnep_sk_list = { 34 .lock = __RW_LOCK_UNLOCKED(bnep_sk_list.lock) 35 }; 36 37 static int bnep_sock_release(struct socket *sock) 38 { 39 struct sock *sk = sock->sk; 40 41 BT_DBG("sock %p sk %p", sock, sk); 42 43 if (!sk) 44 return 0; 45 46 bt_sock_unlink(&bnep_sk_list, sk); 47 48 sock_orphan(sk); 49 sock_put(sk); 50 return 0; 51 } 52 53 static int do_bnep_sock_ioctl(struct socket *sock, unsigned int cmd, void __user *argp) 54 { 55 struct bnep_connlist_req cl; 56 struct bnep_connadd_req ca; 57 struct bnep_conndel_req cd; 58 struct bnep_conninfo ci; 59 struct socket *nsock; 60 __u32 supp_feat = BIT(BNEP_SETUP_RESPONSE); 61 int err; 62 63 BT_DBG("cmd %x arg %p", cmd, argp); 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 static int bnep_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 138 { 139 return do_bnep_sock_ioctl(sock, cmd, (void __user *)arg); 140 } 141 142 #ifdef CONFIG_COMPAT 143 static int bnep_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 144 { 145 void __user *argp = compat_ptr(arg); 146 if (cmd == BNEPGETCONNLIST) { 147 struct bnep_connlist_req cl; 148 unsigned __user *p = argp; 149 u32 uci; 150 int err; 151 152 if (get_user(cl.cnum, p) || get_user(uci, p + 1)) 153 return -EFAULT; 154 155 cl.ci = compat_ptr(uci); 156 157 if (cl.cnum <= 0) 158 return -EINVAL; 159 160 err = bnep_get_connlist(&cl); 161 162 if (!err && put_user(cl.cnum, p)) 163 err = -EFAULT; 164 165 return err; 166 } 167 168 return do_bnep_sock_ioctl(sock, cmd, argp); 169 } 170 #endif 171 172 static const struct proto_ops bnep_sock_ops = { 173 .family = PF_BLUETOOTH, 174 .owner = THIS_MODULE, 175 .release = bnep_sock_release, 176 .ioctl = bnep_sock_ioctl, 177 #ifdef CONFIG_COMPAT 178 .compat_ioctl = bnep_sock_compat_ioctl, 179 #endif 180 .bind = sock_no_bind, 181 .getname = sock_no_getname, 182 .sendmsg = sock_no_sendmsg, 183 .recvmsg = sock_no_recvmsg, 184 .listen = sock_no_listen, 185 .shutdown = sock_no_shutdown, 186 .connect = sock_no_connect, 187 .socketpair = sock_no_socketpair, 188 .accept = sock_no_accept, 189 .mmap = sock_no_mmap 190 }; 191 192 static struct proto bnep_proto = { 193 .name = "BNEP", 194 .owner = THIS_MODULE, 195 .obj_size = sizeof(struct bt_sock) 196 }; 197 198 static int bnep_sock_create(struct net *net, struct socket *sock, int protocol, 199 int kern) 200 { 201 struct sock *sk; 202 203 BT_DBG("sock %p", sock); 204 205 if (sock->type != SOCK_RAW) 206 return -ESOCKTNOSUPPORT; 207 208 sk = bt_sock_alloc(net, sock, &bnep_proto, protocol, GFP_ATOMIC, kern); 209 if (!sk) 210 return -ENOMEM; 211 212 sock->ops = &bnep_sock_ops; 213 sock->state = SS_UNCONNECTED; 214 215 bt_sock_link(&bnep_sk_list, sk); 216 return 0; 217 } 218 219 static const struct net_proto_family bnep_sock_family_ops = { 220 .family = PF_BLUETOOTH, 221 .owner = THIS_MODULE, 222 .create = bnep_sock_create 223 }; 224 225 int __init bnep_sock_init(void) 226 { 227 int err; 228 229 err = proto_register(&bnep_proto, 0); 230 if (err < 0) 231 return err; 232 233 err = bt_sock_register(BTPROTO_BNEP, &bnep_sock_family_ops); 234 if (err < 0) { 235 BT_ERR("Can't register BNEP socket"); 236 goto error; 237 } 238 239 err = bt_procfs_init(&init_net, "bnep", &bnep_sk_list, NULL); 240 if (err < 0) { 241 BT_ERR("Failed to create BNEP proc file"); 242 bt_sock_unregister(BTPROTO_BNEP); 243 goto error; 244 } 245 246 BT_INFO("BNEP socket layer initialized"); 247 248 return 0; 249 250 error: 251 proto_unregister(&bnep_proto); 252 return err; 253 } 254 255 void __exit bnep_sock_cleanup(void) 256 { 257 bt_procfs_cleanup(&init_net, "bnep"); 258 bt_sock_unregister(BTPROTO_BNEP); 259 proto_unregister(&bnep_proto); 260 } 261