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 #include <asm/system.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 int kern) 195 { 196 struct sock *sk; 197 198 BT_DBG("sock %p", sock); 199 200 if (sock->type != SOCK_RAW) 201 return -ESOCKTNOSUPPORT; 202 203 sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &cmtp_proto); 204 if (!sk) 205 return -ENOMEM; 206 207 sock_init_data(sock, sk); 208 209 sock->ops = &cmtp_sock_ops; 210 211 sock->state = SS_UNCONNECTED; 212 213 sock_reset_flag(sk, SOCK_ZAPPED); 214 215 sk->sk_protocol = protocol; 216 sk->sk_state = BT_OPEN; 217 218 return 0; 219 } 220 221 static const struct net_proto_family cmtp_sock_family_ops = { 222 .family = PF_BLUETOOTH, 223 .owner = THIS_MODULE, 224 .create = cmtp_sock_create 225 }; 226 227 int cmtp_init_sockets(void) 228 { 229 int err; 230 231 err = proto_register(&cmtp_proto, 0); 232 if (err < 0) 233 return err; 234 235 err = bt_sock_register(BTPROTO_CMTP, &cmtp_sock_family_ops); 236 if (err < 0) 237 goto error; 238 239 return 0; 240 241 error: 242 BT_ERR("Can't register CMTP socket"); 243 proto_unregister(&cmtp_proto); 244 return err; 245 } 246 247 void cmtp_cleanup_sockets(void) 248 { 249 if (bt_sock_unregister(BTPROTO_CMTP) < 0) 250 BT_ERR("Can't unregister CMTP socket"); 251 252 proto_unregister(&cmtp_proto); 253 } 254