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 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 92 err = bnep_add_connection(&ca, nsock); 93 if (!err) { 94 if (copy_to_user(argp, &ca, sizeof(ca))) 95 err = -EFAULT; 96 } else 97 sockfd_put(nsock); 98 99 return err; 100 101 case BNEPCONNDEL: 102 if (!capable(CAP_NET_ADMIN)) 103 return -EACCES; 104 105 if (copy_from_user(&cd, argp, sizeof(cd))) 106 return -EFAULT; 107 108 return bnep_del_connection(&cd); 109 110 case BNEPGETCONNLIST: 111 if (copy_from_user(&cl, argp, sizeof(cl))) 112 return -EFAULT; 113 114 if (cl.cnum <= 0) 115 return -EINVAL; 116 117 err = bnep_get_connlist(&cl); 118 if (!err && copy_to_user(argp, &cl, sizeof(cl))) 119 return -EFAULT; 120 121 return err; 122 123 case BNEPGETCONNINFO: 124 if (copy_from_user(&ci, argp, sizeof(ci))) 125 return -EFAULT; 126 127 err = bnep_get_conninfo(&ci); 128 if (!err && copy_to_user(argp, &ci, sizeof(ci))) 129 return -EFAULT; 130 131 return err; 132 133 default: 134 return -EINVAL; 135 } 136 137 return 0; 138 } 139 140 #ifdef CONFIG_COMPAT 141 static int bnep_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 142 { 143 if (cmd == BNEPGETCONNLIST) { 144 struct bnep_connlist_req cl; 145 uint32_t uci; 146 int err; 147 148 if (get_user(cl.cnum, (uint32_t __user *) arg) || 149 get_user(uci, (u32 __user *) (arg + 4))) 150 return -EFAULT; 151 152 cl.ci = compat_ptr(uci); 153 154 if (cl.cnum <= 0) 155 return -EINVAL; 156 157 err = bnep_get_connlist(&cl); 158 159 if (!err && put_user(cl.cnum, (uint32_t __user *) arg)) 160 err = -EFAULT; 161 162 return err; 163 } 164 165 return bnep_sock_ioctl(sock, cmd, arg); 166 } 167 #endif 168 169 static const struct proto_ops bnep_sock_ops = { 170 .family = PF_BLUETOOTH, 171 .owner = THIS_MODULE, 172 .release = bnep_sock_release, 173 .ioctl = bnep_sock_ioctl, 174 #ifdef CONFIG_COMPAT 175 .compat_ioctl = bnep_sock_compat_ioctl, 176 #endif 177 .bind = sock_no_bind, 178 .getname = sock_no_getname, 179 .sendmsg = sock_no_sendmsg, 180 .recvmsg = sock_no_recvmsg, 181 .poll = sock_no_poll, 182 .listen = sock_no_listen, 183 .shutdown = sock_no_shutdown, 184 .setsockopt = sock_no_setsockopt, 185 .getsockopt = sock_no_getsockopt, 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 { 200 struct sock *sk; 201 202 BT_DBG("sock %p", sock); 203 204 if (sock->type != SOCK_RAW) 205 return -ESOCKTNOSUPPORT; 206 207 sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &bnep_proto); 208 if (!sk) 209 return -ENOMEM; 210 211 sock_init_data(sock, sk); 212 213 sock->ops = &bnep_sock_ops; 214 215 sock->state = SS_UNCONNECTED; 216 217 sock_reset_flag(sk, SOCK_ZAPPED); 218 219 sk->sk_protocol = protocol; 220 sk->sk_state = BT_OPEN; 221 222 return 0; 223 } 224 225 static struct net_proto_family bnep_sock_family_ops = { 226 .family = PF_BLUETOOTH, 227 .owner = THIS_MODULE, 228 .create = bnep_sock_create 229 }; 230 231 int __init bnep_sock_init(void) 232 { 233 int err; 234 235 err = proto_register(&bnep_proto, 0); 236 if (err < 0) 237 return err; 238 239 err = bt_sock_register(BTPROTO_BNEP, &bnep_sock_family_ops); 240 if (err < 0) 241 goto error; 242 243 return 0; 244 245 error: 246 BT_ERR("Can't register BNEP socket"); 247 proto_unregister(&bnep_proto); 248 return err; 249 } 250 251 void __exit bnep_sock_cleanup(void) 252 { 253 if (bt_sock_unregister(BTPROTO_BNEP) < 0) 254 BT_ERR("Can't unregister BNEP socket"); 255 256 proto_unregister(&bnep_proto); 257 } 258