1 /* 2 CMTP implementation for Linux Bluetooth stack (BlueZ). 3 Copyright (C) 2002-2003 Marcel Holtmann <marcel@holtmann.org> 4 5 This program is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License version 2 as 7 published by the Free Software Foundation; 8 9 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 10 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 11 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. 12 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY 13 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES 14 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 18 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, 19 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS 20 SOFTWARE IS DISCLAIMED. 21 */ 22 23 #include <linux/module.h> 24 25 #include <linux/types.h> 26 #include <linux/capability.h> 27 #include <linux/errno.h> 28 #include <linux/kernel.h> 29 #include <linux/slab.h> 30 #include <linux/poll.h> 31 #include <linux/fcntl.h> 32 #include <linux/skbuff.h> 33 #include <linux/socket.h> 34 #include <linux/ioctl.h> 35 #include <linux/file.h> 36 #include <linux/compat.h> 37 #include <net/sock.h> 38 39 #include <linux/isdn/capilli.h> 40 41 #include <asm/system.h> 42 #include <asm/uaccess.h> 43 44 #include "cmtp.h" 45 46 static int cmtp_sock_release(struct socket *sock) 47 { 48 struct sock *sk = sock->sk; 49 50 BT_DBG("sock %p sk %p", sock, sk); 51 52 if (!sk) 53 return 0; 54 55 sock_orphan(sk); 56 sock_put(sk); 57 58 return 0; 59 } 60 61 static int cmtp_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 62 { 63 struct cmtp_connadd_req ca; 64 struct cmtp_conndel_req cd; 65 struct cmtp_connlist_req cl; 66 struct cmtp_conninfo ci; 67 struct socket *nsock; 68 void __user *argp = (void __user *)arg; 69 int err; 70 71 BT_DBG("cmd %x arg %lx", cmd, arg); 72 73 switch (cmd) { 74 case CMTPCONNADD: 75 if (!capable(CAP_NET_ADMIN)) 76 return -EACCES; 77 78 if (copy_from_user(&ca, argp, sizeof(ca))) 79 return -EFAULT; 80 81 nsock = sockfd_lookup(ca.sock, &err); 82 if (!nsock) 83 return err; 84 85 if (nsock->sk->sk_state != BT_CONNECTED) { 86 sockfd_put(nsock); 87 return -EBADFD; 88 } 89 90 err = cmtp_add_connection(&ca, nsock); 91 if (!err) { 92 if (copy_to_user(argp, &ca, sizeof(ca))) 93 err = -EFAULT; 94 } else 95 sockfd_put(nsock); 96 97 return err; 98 99 case CMTPCONNDEL: 100 if (!capable(CAP_NET_ADMIN)) 101 return -EACCES; 102 103 if (copy_from_user(&cd, argp, sizeof(cd))) 104 return -EFAULT; 105 106 return cmtp_del_connection(&cd); 107 108 case CMTPGETCONNLIST: 109 if (copy_from_user(&cl, argp, sizeof(cl))) 110 return -EFAULT; 111 112 if (cl.cnum <= 0) 113 return -EINVAL; 114 115 err = cmtp_get_connlist(&cl); 116 if (!err && copy_to_user(argp, &cl, sizeof(cl))) 117 return -EFAULT; 118 119 return err; 120 121 case CMTPGETCONNINFO: 122 if (copy_from_user(&ci, argp, sizeof(ci))) 123 return -EFAULT; 124 125 err = cmtp_get_conninfo(&ci); 126 if (!err && copy_to_user(argp, &ci, sizeof(ci))) 127 return -EFAULT; 128 129 return err; 130 } 131 132 return -EINVAL; 133 } 134 135 #ifdef CONFIG_COMPAT 136 static int cmtp_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 137 { 138 if (cmd == CMTPGETCONNLIST) { 139 struct cmtp_connlist_req cl; 140 uint32_t uci; 141 int err; 142 143 if (get_user(cl.cnum, (uint32_t __user *) arg) || 144 get_user(uci, (u32 __user *) (arg + 4))) 145 return -EFAULT; 146 147 cl.ci = compat_ptr(uci); 148 149 if (cl.cnum <= 0) 150 return -EINVAL; 151 152 err = cmtp_get_connlist(&cl); 153 154 if (!err && put_user(cl.cnum, (uint32_t __user *) arg)) 155 err = -EFAULT; 156 157 return err; 158 } 159 160 return cmtp_sock_ioctl(sock, cmd, arg); 161 } 162 #endif 163 164 static const struct proto_ops cmtp_sock_ops = { 165 .family = PF_BLUETOOTH, 166 .owner = THIS_MODULE, 167 .release = cmtp_sock_release, 168 .ioctl = cmtp_sock_ioctl, 169 #ifdef CONFIG_COMPAT 170 .compat_ioctl = cmtp_sock_compat_ioctl, 171 #endif 172 .bind = sock_no_bind, 173 .getname = sock_no_getname, 174 .sendmsg = sock_no_sendmsg, 175 .recvmsg = sock_no_recvmsg, 176 .poll = sock_no_poll, 177 .listen = sock_no_listen, 178 .shutdown = sock_no_shutdown, 179 .setsockopt = sock_no_setsockopt, 180 .getsockopt = sock_no_getsockopt, 181 .connect = sock_no_connect, 182 .socketpair = sock_no_socketpair, 183 .accept = sock_no_accept, 184 .mmap = sock_no_mmap 185 }; 186 187 static struct proto cmtp_proto = { 188 .name = "CMTP", 189 .owner = THIS_MODULE, 190 .obj_size = sizeof(struct bt_sock) 191 }; 192 193 static int cmtp_sock_create(struct net *net, struct socket *sock, int protocol) 194 { 195 struct sock *sk; 196 197 BT_DBG("sock %p", sock); 198 199 if (sock->type != SOCK_RAW) 200 return -ESOCKTNOSUPPORT; 201 202 sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &cmtp_proto); 203 if (!sk) 204 return -ENOMEM; 205 206 sock_init_data(sock, sk); 207 208 sock->ops = &cmtp_sock_ops; 209 210 sock->state = SS_UNCONNECTED; 211 212 sock_reset_flag(sk, SOCK_ZAPPED); 213 214 sk->sk_protocol = protocol; 215 sk->sk_state = BT_OPEN; 216 217 return 0; 218 } 219 220 static struct net_proto_family cmtp_sock_family_ops = { 221 .family = PF_BLUETOOTH, 222 .owner = THIS_MODULE, 223 .create = cmtp_sock_create 224 }; 225 226 int cmtp_init_sockets(void) 227 { 228 int err; 229 230 err = proto_register(&cmtp_proto, 0); 231 if (err < 0) 232 return err; 233 234 err = bt_sock_register(BTPROTO_CMTP, &cmtp_sock_family_ops); 235 if (err < 0) 236 goto error; 237 238 return 0; 239 240 error: 241 BT_ERR("Can't register CMTP socket"); 242 proto_unregister(&cmtp_proto); 243 return err; 244 } 245 246 void cmtp_cleanup_sockets(void) 247 { 248 if (bt_sock_unregister(BTPROTO_CMTP) < 0) 249 BT_ERR("Can't unregister CMTP socket"); 250 251 proto_unregister(&cmtp_proto); 252 } 253