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/poll.h> 30 #include <linux/fcntl.h> 31 #include <linux/skbuff.h> 32 #include <linux/socket.h> 33 #include <linux/ioctl.h> 34 #include <linux/file.h> 35 #include <linux/compat.h> 36 #include <linux/gfp.h> 37 #include <linux/uaccess.h> 38 #include <net/sock.h> 39 40 #include <linux/isdn/capilli.h> 41 42 43 #include "cmtp.h" 44 45 static int cmtp_sock_release(struct socket *sock) 46 { 47 struct sock *sk = sock->sk; 48 49 BT_DBG("sock %p sk %p", sock, sk); 50 51 if (!sk) 52 return 0; 53 54 sock_orphan(sk); 55 sock_put(sk); 56 57 return 0; 58 } 59 60 static int cmtp_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 61 { 62 struct cmtp_connadd_req ca; 63 struct cmtp_conndel_req cd; 64 struct cmtp_connlist_req cl; 65 struct cmtp_conninfo ci; 66 struct socket *nsock; 67 void __user *argp = (void __user *)arg; 68 int err; 69 70 BT_DBG("cmd %x arg %lx", cmd, arg); 71 72 switch (cmd) { 73 case CMTPCONNADD: 74 if (!capable(CAP_NET_ADMIN)) 75 return -EACCES; 76 77 if (copy_from_user(&ca, argp, sizeof(ca))) 78 return -EFAULT; 79 80 nsock = sockfd_lookup(ca.sock, &err); 81 if (!nsock) 82 return err; 83 84 if (nsock->sk->sk_state != BT_CONNECTED) { 85 sockfd_put(nsock); 86 return -EBADFD; 87 } 88 89 err = cmtp_add_connection(&ca, nsock); 90 if (!err) { 91 if (copy_to_user(argp, &ca, sizeof(ca))) 92 err = -EFAULT; 93 } else 94 sockfd_put(nsock); 95 96 return err; 97 98 case CMTPCONNDEL: 99 if (!capable(CAP_NET_ADMIN)) 100 return -EACCES; 101 102 if (copy_from_user(&cd, argp, sizeof(cd))) 103 return -EFAULT; 104 105 return cmtp_del_connection(&cd); 106 107 case CMTPGETCONNLIST: 108 if (copy_from_user(&cl, argp, sizeof(cl))) 109 return -EFAULT; 110 111 if (cl.cnum <= 0) 112 return -EINVAL; 113 114 err = cmtp_get_connlist(&cl); 115 if (!err && copy_to_user(argp, &cl, sizeof(cl))) 116 return -EFAULT; 117 118 return err; 119 120 case CMTPGETCONNINFO: 121 if (copy_from_user(&ci, argp, sizeof(ci))) 122 return -EFAULT; 123 124 err = cmtp_get_conninfo(&ci); 125 if (!err && copy_to_user(argp, &ci, sizeof(ci))) 126 return -EFAULT; 127 128 return err; 129 } 130 131 return -EINVAL; 132 } 133 134 #ifdef CONFIG_COMPAT 135 static int cmtp_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 136 { 137 if (cmd == CMTPGETCONNLIST) { 138 struct cmtp_connlist_req cl; 139 u32 uci; 140 int err; 141 142 if (get_user(cl.cnum, (u32 __user *) arg) || 143 get_user(uci, (u32 __user *) (arg + 4))) 144 return -EFAULT; 145 146 cl.ci = compat_ptr(uci); 147 148 if (cl.cnum <= 0) 149 return -EINVAL; 150 151 err = cmtp_get_connlist(&cl); 152 153 if (!err && put_user(cl.cnum, (u32 __user *) arg)) 154 err = -EFAULT; 155 156 return err; 157 } 158 159 return cmtp_sock_ioctl(sock, cmd, arg); 160 } 161 #endif 162 163 static const struct proto_ops cmtp_sock_ops = { 164 .family = PF_BLUETOOTH, 165 .owner = THIS_MODULE, 166 .release = cmtp_sock_release, 167 .ioctl = cmtp_sock_ioctl, 168 #ifdef CONFIG_COMPAT 169 .compat_ioctl = cmtp_sock_compat_ioctl, 170 #endif 171 .bind = sock_no_bind, 172 .getname = sock_no_getname, 173 .sendmsg = sock_no_sendmsg, 174 .recvmsg = sock_no_recvmsg, 175 .poll = sock_no_poll, 176 .listen = sock_no_listen, 177 .shutdown = sock_no_shutdown, 178 .setsockopt = sock_no_setsockopt, 179 .getsockopt = sock_no_getsockopt, 180 .connect = sock_no_connect, 181 .socketpair = sock_no_socketpair, 182 .accept = sock_no_accept, 183 .mmap = sock_no_mmap 184 }; 185 186 static struct proto cmtp_proto = { 187 .name = "CMTP", 188 .owner = THIS_MODULE, 189 .obj_size = sizeof(struct bt_sock) 190 }; 191 192 static int cmtp_sock_create(struct net *net, struct socket *sock, int protocol, 193 int kern) 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 const 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