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 int bnep_sock_release(struct socket *sock) 33 { 34 struct sock *sk = sock->sk; 35 36 BT_DBG("sock %p sk %p", sock, sk); 37 38 if (!sk) 39 return 0; 40 41 sock_orphan(sk); 42 sock_put(sk); 43 return 0; 44 } 45 46 static int bnep_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 47 { 48 struct bnep_connlist_req cl; 49 struct bnep_connadd_req ca; 50 struct bnep_conndel_req cd; 51 struct bnep_conninfo ci; 52 struct socket *nsock; 53 void __user *argp = (void __user *)arg; 54 int err; 55 56 BT_DBG("cmd %x arg %lx", cmd, arg); 57 58 switch (cmd) { 59 case BNEPCONNADD: 60 if (!capable(CAP_NET_ADMIN)) 61 return -EACCES; 62 63 if (copy_from_user(&ca, argp, sizeof(ca))) 64 return -EFAULT; 65 66 nsock = sockfd_lookup(ca.sock, &err); 67 if (!nsock) 68 return err; 69 70 if (nsock->sk->sk_state != BT_CONNECTED) { 71 sockfd_put(nsock); 72 return -EBADFD; 73 } 74 ca.device[sizeof(ca.device)-1] = 0; 75 76 err = bnep_add_connection(&ca, nsock); 77 if (!err) { 78 if (copy_to_user(argp, &ca, sizeof(ca))) 79 err = -EFAULT; 80 } else 81 sockfd_put(nsock); 82 83 return err; 84 85 case BNEPCONNDEL: 86 if (!capable(CAP_NET_ADMIN)) 87 return -EACCES; 88 89 if (copy_from_user(&cd, argp, sizeof(cd))) 90 return -EFAULT; 91 92 return bnep_del_connection(&cd); 93 94 case BNEPGETCONNLIST: 95 if (copy_from_user(&cl, argp, sizeof(cl))) 96 return -EFAULT; 97 98 if (cl.cnum <= 0) 99 return -EINVAL; 100 101 err = bnep_get_connlist(&cl); 102 if (!err && copy_to_user(argp, &cl, sizeof(cl))) 103 return -EFAULT; 104 105 return err; 106 107 case BNEPGETCONNINFO: 108 if (copy_from_user(&ci, argp, sizeof(ci))) 109 return -EFAULT; 110 111 err = bnep_get_conninfo(&ci); 112 if (!err && copy_to_user(argp, &ci, sizeof(ci))) 113 return -EFAULT; 114 115 return err; 116 117 default: 118 return -EINVAL; 119 } 120 121 return 0; 122 } 123 124 #ifdef CONFIG_COMPAT 125 static int bnep_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 126 { 127 if (cmd == BNEPGETCONNLIST) { 128 struct bnep_connlist_req cl; 129 u32 uci; 130 int err; 131 132 if (get_user(cl.cnum, (u32 __user *) arg) || 133 get_user(uci, (u32 __user *) (arg + 4))) 134 return -EFAULT; 135 136 cl.ci = compat_ptr(uci); 137 138 if (cl.cnum <= 0) 139 return -EINVAL; 140 141 err = bnep_get_connlist(&cl); 142 143 if (!err && put_user(cl.cnum, (u32 __user *) arg)) 144 err = -EFAULT; 145 146 return err; 147 } 148 149 return bnep_sock_ioctl(sock, cmd, arg); 150 } 151 #endif 152 153 static const struct proto_ops bnep_sock_ops = { 154 .family = PF_BLUETOOTH, 155 .owner = THIS_MODULE, 156 .release = bnep_sock_release, 157 .ioctl = bnep_sock_ioctl, 158 #ifdef CONFIG_COMPAT 159 .compat_ioctl = bnep_sock_compat_ioctl, 160 #endif 161 .bind = sock_no_bind, 162 .getname = sock_no_getname, 163 .sendmsg = sock_no_sendmsg, 164 .recvmsg = sock_no_recvmsg, 165 .poll = sock_no_poll, 166 .listen = sock_no_listen, 167 .shutdown = sock_no_shutdown, 168 .setsockopt = sock_no_setsockopt, 169 .getsockopt = sock_no_getsockopt, 170 .connect = sock_no_connect, 171 .socketpair = sock_no_socketpair, 172 .accept = sock_no_accept, 173 .mmap = sock_no_mmap 174 }; 175 176 static struct proto bnep_proto = { 177 .name = "BNEP", 178 .owner = THIS_MODULE, 179 .obj_size = sizeof(struct bt_sock) 180 }; 181 182 static int bnep_sock_create(struct net *net, struct socket *sock, int protocol, 183 int kern) 184 { 185 struct sock *sk; 186 187 BT_DBG("sock %p", sock); 188 189 if (sock->type != SOCK_RAW) 190 return -ESOCKTNOSUPPORT; 191 192 sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &bnep_proto); 193 if (!sk) 194 return -ENOMEM; 195 196 sock_init_data(sock, sk); 197 198 sock->ops = &bnep_sock_ops; 199 200 sock->state = SS_UNCONNECTED; 201 202 sock_reset_flag(sk, SOCK_ZAPPED); 203 204 sk->sk_protocol = protocol; 205 sk->sk_state = BT_OPEN; 206 207 return 0; 208 } 209 210 static const struct net_proto_family bnep_sock_family_ops = { 211 .family = PF_BLUETOOTH, 212 .owner = THIS_MODULE, 213 .create = bnep_sock_create 214 }; 215 216 int __init bnep_sock_init(void) 217 { 218 int err; 219 220 err = proto_register(&bnep_proto, 0); 221 if (err < 0) 222 return err; 223 224 err = bt_sock_register(BTPROTO_BNEP, &bnep_sock_family_ops); 225 if (err < 0) 226 goto error; 227 228 return 0; 229 230 error: 231 BT_ERR("Can't register BNEP socket"); 232 proto_unregister(&bnep_proto); 233 return err; 234 } 235 236 void __exit bnep_sock_cleanup(void) 237 { 238 if (bt_sock_unregister(BTPROTO_BNEP) < 0) 239 BT_ERR("Can't unregister BNEP socket"); 240 241 proto_unregister(&bnep_proto); 242 } 243