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 /* 28 * $Id: sock.c,v 1.4 2002/08/04 21:23:58 maxk Exp $ 29 */ 30 31 #include <linux/module.h> 32 33 #include <linux/types.h> 34 #include <linux/capability.h> 35 #include <linux/errno.h> 36 #include <linux/kernel.h> 37 #include <linux/slab.h> 38 #include <linux/poll.h> 39 #include <linux/fcntl.h> 40 #include <linux/skbuff.h> 41 #include <linux/socket.h> 42 #include <linux/ioctl.h> 43 #include <linux/file.h> 44 #include <linux/init.h> 45 #include <linux/compat.h> 46 #include <net/sock.h> 47 48 #include <asm/system.h> 49 #include <asm/uaccess.h> 50 51 #include "bnep.h" 52 53 #ifndef CONFIG_BT_BNEP_DEBUG 54 #undef BT_DBG 55 #define BT_DBG( A... ) 56 #endif 57 58 static int bnep_sock_release(struct socket *sock) 59 { 60 struct sock *sk = sock->sk; 61 62 BT_DBG("sock %p sk %p", sock, sk); 63 64 if (!sk) 65 return 0; 66 67 sock_orphan(sk); 68 sock_put(sk); 69 return 0; 70 } 71 72 static int bnep_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 73 { 74 struct bnep_connlist_req cl; 75 struct bnep_connadd_req ca; 76 struct bnep_conndel_req cd; 77 struct bnep_conninfo ci; 78 struct socket *nsock; 79 void __user *argp = (void __user *)arg; 80 int err; 81 82 BT_DBG("cmd %x arg %lx", cmd, arg); 83 84 switch (cmd) { 85 case BNEPCONNADD: 86 if (!capable(CAP_NET_ADMIN)) 87 return -EACCES; 88 89 if (copy_from_user(&ca, argp, sizeof(ca))) 90 return -EFAULT; 91 92 nsock = sockfd_lookup(ca.sock, &err); 93 if (!nsock) 94 return err; 95 96 if (nsock->sk->sk_state != BT_CONNECTED) { 97 sockfd_put(nsock); 98 return -EBADFD; 99 } 100 101 err = bnep_add_connection(&ca, nsock); 102 if (!err) { 103 if (copy_to_user(argp, &ca, sizeof(ca))) 104 err = -EFAULT; 105 } else 106 sockfd_put(nsock); 107 108 return err; 109 110 case BNEPCONNDEL: 111 if (!capable(CAP_NET_ADMIN)) 112 return -EACCES; 113 114 if (copy_from_user(&cd, argp, sizeof(cd))) 115 return -EFAULT; 116 117 return bnep_del_connection(&cd); 118 119 case BNEPGETCONNLIST: 120 if (copy_from_user(&cl, argp, sizeof(cl))) 121 return -EFAULT; 122 123 if (cl.cnum <= 0) 124 return -EINVAL; 125 126 err = bnep_get_connlist(&cl); 127 if (!err && copy_to_user(argp, &cl, sizeof(cl))) 128 return -EFAULT; 129 130 return err; 131 132 case BNEPGETCONNINFO: 133 if (copy_from_user(&ci, argp, sizeof(ci))) 134 return -EFAULT; 135 136 err = bnep_get_conninfo(&ci); 137 if (!err && copy_to_user(argp, &ci, sizeof(ci))) 138 return -EFAULT; 139 140 return err; 141 142 default: 143 return -EINVAL; 144 } 145 146 return 0; 147 } 148 149 #ifdef CONFIG_COMPAT 150 static int bnep_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 151 { 152 if (cmd == BNEPGETCONNLIST) { 153 struct bnep_connlist_req cl; 154 uint32_t uci; 155 int err; 156 157 if (get_user(cl.cnum, (uint32_t __user *) arg) || 158 get_user(uci, (u32 __user *) (arg + 4))) 159 return -EFAULT; 160 161 cl.ci = compat_ptr(uci); 162 163 if (cl.cnum <= 0) 164 return -EINVAL; 165 166 err = bnep_get_connlist(&cl); 167 168 if (!err && put_user(cl.cnum, (uint32_t __user *) arg)) 169 err = -EFAULT; 170 171 return err; 172 } 173 174 return bnep_sock_ioctl(sock, cmd, arg); 175 } 176 #endif 177 178 static const struct proto_ops bnep_sock_ops = { 179 .family = PF_BLUETOOTH, 180 .owner = THIS_MODULE, 181 .release = bnep_sock_release, 182 .ioctl = bnep_sock_ioctl, 183 #ifdef CONFIG_COMPAT 184 .compat_ioctl = bnep_sock_compat_ioctl, 185 #endif 186 .bind = sock_no_bind, 187 .getname = sock_no_getname, 188 .sendmsg = sock_no_sendmsg, 189 .recvmsg = sock_no_recvmsg, 190 .poll = sock_no_poll, 191 .listen = sock_no_listen, 192 .shutdown = sock_no_shutdown, 193 .setsockopt = sock_no_setsockopt, 194 .getsockopt = sock_no_getsockopt, 195 .connect = sock_no_connect, 196 .socketpair = sock_no_socketpair, 197 .accept = sock_no_accept, 198 .mmap = sock_no_mmap 199 }; 200 201 static struct proto bnep_proto = { 202 .name = "BNEP", 203 .owner = THIS_MODULE, 204 .obj_size = sizeof(struct bt_sock) 205 }; 206 207 static int bnep_sock_create(struct net *net, struct socket *sock, int protocol) 208 { 209 struct sock *sk; 210 211 BT_DBG("sock %p", sock); 212 213 if (sock->type != SOCK_RAW) 214 return -ESOCKTNOSUPPORT; 215 216 sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &bnep_proto); 217 if (!sk) 218 return -ENOMEM; 219 220 sock_init_data(sock, sk); 221 222 sock->ops = &bnep_sock_ops; 223 224 sock->state = SS_UNCONNECTED; 225 226 sock_reset_flag(sk, SOCK_ZAPPED); 227 228 sk->sk_protocol = protocol; 229 sk->sk_state = BT_OPEN; 230 231 return 0; 232 } 233 234 static struct net_proto_family bnep_sock_family_ops = { 235 .family = PF_BLUETOOTH, 236 .owner = THIS_MODULE, 237 .create = bnep_sock_create 238 }; 239 240 int __init bnep_sock_init(void) 241 { 242 int err; 243 244 err = proto_register(&bnep_proto, 0); 245 if (err < 0) 246 return err; 247 248 err = bt_sock_register(BTPROTO_BNEP, &bnep_sock_family_ops); 249 if (err < 0) 250 goto error; 251 252 return 0; 253 254 error: 255 BT_ERR("Can't register BNEP socket"); 256 proto_unregister(&bnep_proto); 257 return err; 258 } 259 260 void __exit bnep_sock_cleanup(void) 261 { 262 if (bt_sock_unregister(BTPROTO_BNEP) < 0) 263 BT_ERR("Can't unregister BNEP socket"); 264 265 proto_unregister(&bnep_proto); 266 } 267