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/sched.h> 38 #include <linux/slab.h> 39 #include <linux/poll.h> 40 #include <linux/fcntl.h> 41 #include <linux/skbuff.h> 42 #include <linux/socket.h> 43 #include <linux/ioctl.h> 44 #include <linux/file.h> 45 #include <linux/init.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 fput(nsock->file); 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 fput(nsock->file); 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 static const struct proto_ops bnep_sock_ops = { 150 .family = PF_BLUETOOTH, 151 .owner = THIS_MODULE, 152 .release = bnep_sock_release, 153 .ioctl = bnep_sock_ioctl, 154 .bind = sock_no_bind, 155 .getname = sock_no_getname, 156 .sendmsg = sock_no_sendmsg, 157 .recvmsg = sock_no_recvmsg, 158 .poll = sock_no_poll, 159 .listen = sock_no_listen, 160 .shutdown = sock_no_shutdown, 161 .setsockopt = sock_no_setsockopt, 162 .getsockopt = sock_no_getsockopt, 163 .connect = sock_no_connect, 164 .socketpair = sock_no_socketpair, 165 .accept = sock_no_accept, 166 .mmap = sock_no_mmap 167 }; 168 169 static struct proto bnep_proto = { 170 .name = "BNEP", 171 .owner = THIS_MODULE, 172 .obj_size = sizeof(struct bt_sock) 173 }; 174 175 static int bnep_sock_create(struct socket *sock, int protocol) 176 { 177 struct sock *sk; 178 179 BT_DBG("sock %p", sock); 180 181 if (sock->type != SOCK_RAW) 182 return -ESOCKTNOSUPPORT; 183 184 sk = sk_alloc(PF_BLUETOOTH, GFP_KERNEL, &bnep_proto, 1); 185 if (!sk) 186 return -ENOMEM; 187 188 sock_init_data(sock, sk); 189 190 sock->ops = &bnep_sock_ops; 191 192 sock->state = SS_UNCONNECTED; 193 194 sock_reset_flag(sk, SOCK_ZAPPED); 195 196 sk->sk_protocol = protocol; 197 sk->sk_state = BT_OPEN; 198 199 return 0; 200 } 201 202 static struct net_proto_family bnep_sock_family_ops = { 203 .family = PF_BLUETOOTH, 204 .owner = THIS_MODULE, 205 .create = bnep_sock_create 206 }; 207 208 int __init bnep_sock_init(void) 209 { 210 int err; 211 212 err = proto_register(&bnep_proto, 0); 213 if (err < 0) 214 return err; 215 216 err = bt_sock_register(BTPROTO_BNEP, &bnep_sock_family_ops); 217 if (err < 0) 218 goto error; 219 220 return 0; 221 222 error: 223 BT_ERR("Can't register BNEP socket"); 224 proto_unregister(&bnep_proto); 225 return err; 226 } 227 228 int __exit bnep_sock_cleanup(void) 229 { 230 if (bt_sock_unregister(BTPROTO_BNEP) < 0) 231 BT_ERR("Can't unregister BNEP socket"); 232 233 proto_unregister(&bnep_proto); 234 235 return 0; 236 } 237