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/poll.h> 34#include <linux/fcntl.h> 35#include <linux/skbuff.h> 36#include <linux/socket.h> 37#include <linux/ioctl.h> 38#include <linux/file.h> 39#include <linux/init.h> 40#include <linux/compat.h> 41#include <linux/gfp.h> 42#include <net/sock.h> 43 44#include <asm/system.h> 45#include <asm/uaccess.h> 46 47#include "bnep.h" 48 49static 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 63static 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 141static 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 169static 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 192static struct proto bnep_proto = { 193 .name = "BNEP", 194 .owner = THIS_MODULE, 195 .obj_size = sizeof(struct bt_sock) 196}; 197 198static 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 = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &bnep_proto); 209 if (!sk) 210 return -ENOMEM; 211 212 sock_init_data(sock, sk); 213 214 sock->ops = &bnep_sock_ops; 215 216 sock->state = SS_UNCONNECTED; 217 218 sock_reset_flag(sk, SOCK_ZAPPED); 219 220 sk->sk_protocol = protocol; 221 sk->sk_state = BT_OPEN; 222 223 return 0; 224} 225 226static const struct net_proto_family bnep_sock_family_ops = { 227 .family = PF_BLUETOOTH, 228 .owner = THIS_MODULE, 229 .create = bnep_sock_create 230}; 231 232int __init bnep_sock_init(void) 233{ 234 int err; 235 236 err = proto_register(&bnep_proto, 0); 237 if (err < 0) 238 return err; 239 240 err = bt_sock_register(BTPROTO_BNEP, &bnep_sock_family_ops); 241 if (err < 0) 242 goto error; 243 244 return 0; 245 246error: 247 BT_ERR("Can't register BNEP socket"); 248 proto_unregister(&bnep_proto); 249 return err; 250} 251 252void __exit bnep_sock_cleanup(void) 253{ 254 if (bt_sock_unregister(BTPROTO_BNEP) < 0) 255 BT_ERR("Can't unregister BNEP socket"); 256 257 proto_unregister(&bnep_proto); 258} 259