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/sched.h> 30 #include <linux/slab.h> 31 #include <linux/poll.h> 32 #include <linux/fcntl.h> 33 #include <linux/skbuff.h> 34 #include <linux/socket.h> 35 #include <linux/ioctl.h> 36 #include <linux/file.h> 37 #include <linux/compat.h> 38 #include <net/sock.h> 39 40 #include <linux/isdn/capilli.h> 41 42 #include <asm/system.h> 43 #include <asm/uaccess.h> 44 45 #include "cmtp.h" 46 47 #ifndef CONFIG_BT_CMTP_DEBUG 48 #undef BT_DBG 49 #define BT_DBG(D...) 50 #endif 51 52 static int cmtp_sock_release(struct socket *sock) 53 { 54 struct sock *sk = sock->sk; 55 56 BT_DBG("sock %p sk %p", sock, sk); 57 58 if (!sk) 59 return 0; 60 61 sock_orphan(sk); 62 sock_put(sk); 63 64 return 0; 65 } 66 67 static int cmtp_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 68 { 69 struct cmtp_connadd_req ca; 70 struct cmtp_conndel_req cd; 71 struct cmtp_connlist_req cl; 72 struct cmtp_conninfo ci; 73 struct socket *nsock; 74 void __user *argp = (void __user *)arg; 75 int err; 76 77 BT_DBG("cmd %x arg %lx", cmd, arg); 78 79 switch (cmd) { 80 case CMTPCONNADD: 81 if (!capable(CAP_NET_ADMIN)) 82 return -EACCES; 83 84 if (copy_from_user(&ca, argp, sizeof(ca))) 85 return -EFAULT; 86 87 nsock = sockfd_lookup(ca.sock, &err); 88 if (!nsock) 89 return err; 90 91 if (nsock->sk->sk_state != BT_CONNECTED) { 92 fput(nsock->file); 93 return -EBADFD; 94 } 95 96 err = cmtp_add_connection(&ca, nsock); 97 if (!err) { 98 if (copy_to_user(argp, &ca, sizeof(ca))) 99 err = -EFAULT; 100 } else 101 fput(nsock->file); 102 103 return err; 104 105 case CMTPCONNDEL: 106 if (!capable(CAP_NET_ADMIN)) 107 return -EACCES; 108 109 if (copy_from_user(&cd, argp, sizeof(cd))) 110 return -EFAULT; 111 112 return cmtp_del_connection(&cd); 113 114 case CMTPGETCONNLIST: 115 if (copy_from_user(&cl, argp, sizeof(cl))) 116 return -EFAULT; 117 118 if (cl.cnum <= 0) 119 return -EINVAL; 120 121 err = cmtp_get_connlist(&cl); 122 if (!err && copy_to_user(argp, &cl, sizeof(cl))) 123 return -EFAULT; 124 125 return err; 126 127 case CMTPGETCONNINFO: 128 if (copy_from_user(&ci, argp, sizeof(ci))) 129 return -EFAULT; 130 131 err = cmtp_get_conninfo(&ci); 132 if (!err && copy_to_user(argp, &ci, sizeof(ci))) 133 return -EFAULT; 134 135 return err; 136 } 137 138 return -EINVAL; 139 } 140 141 #ifdef CONFIG_COMPAT 142 static int cmtp_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 143 { 144 if (cmd == CMTPGETCONNLIST) { 145 struct cmtp_connlist_req cl; 146 uint32_t uci; 147 int err; 148 149 if (get_user(cl.cnum, (uint32_t __user *) arg) || 150 get_user(uci, (u32 __user *) (arg + 4))) 151 return -EFAULT; 152 153 cl.ci = compat_ptr(uci); 154 155 if (cl.cnum <= 0) 156 return -EINVAL; 157 158 err = cmtp_get_connlist(&cl); 159 160 if (!err && put_user(cl.cnum, (uint32_t __user *) arg)) 161 err = -EFAULT; 162 163 return err; 164 } 165 166 return cmtp_sock_ioctl(sock, cmd, arg); 167 } 168 #endif 169 170 static const struct proto_ops cmtp_sock_ops = { 171 .family = PF_BLUETOOTH, 172 .owner = THIS_MODULE, 173 .release = cmtp_sock_release, 174 .ioctl = cmtp_sock_ioctl, 175 #ifdef CONFIG_COMPAT 176 .compat_ioctl = cmtp_sock_compat_ioctl, 177 #endif 178 .bind = sock_no_bind, 179 .getname = sock_no_getname, 180 .sendmsg = sock_no_sendmsg, 181 .recvmsg = sock_no_recvmsg, 182 .poll = sock_no_poll, 183 .listen = sock_no_listen, 184 .shutdown = sock_no_shutdown, 185 .setsockopt = sock_no_setsockopt, 186 .getsockopt = sock_no_getsockopt, 187 .connect = sock_no_connect, 188 .socketpair = sock_no_socketpair, 189 .accept = sock_no_accept, 190 .mmap = sock_no_mmap 191 }; 192 193 static struct proto cmtp_proto = { 194 .name = "CMTP", 195 .owner = THIS_MODULE, 196 .obj_size = sizeof(struct bt_sock) 197 }; 198 199 static int cmtp_sock_create(struct socket *sock, int protocol) 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(PF_BLUETOOTH, GFP_ATOMIC, &cmtp_proto, 1); 209 if (!sk) 210 return -ENOMEM; 211 212 sock_init_data(sock, sk); 213 214 sock->ops = &cmtp_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 } 225 226 static struct net_proto_family cmtp_sock_family_ops = { 227 .family = PF_BLUETOOTH, 228 .owner = THIS_MODULE, 229 .create = cmtp_sock_create 230 }; 231 232 int cmtp_init_sockets(void) 233 { 234 int err; 235 236 err = proto_register(&cmtp_proto, 0); 237 if (err < 0) 238 return err; 239 240 err = bt_sock_register(BTPROTO_CMTP, &cmtp_sock_family_ops); 241 if (err < 0) 242 goto error; 243 244 return 0; 245 246 error: 247 BT_ERR("Can't register CMTP socket"); 248 proto_unregister(&cmtp_proto); 249 return err; 250 } 251 252 void cmtp_cleanup_sockets(void) 253 { 254 if (bt_sock_unregister(BTPROTO_CMTP) < 0) 255 BT_ERR("Can't unregister CMTP socket"); 256 257 proto_unregister(&cmtp_proto); 258 } 259