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/config.h> 24 #include <linux/module.h> 25 26 #include <linux/types.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 <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 #ifndef CONFIG_BT_CMTP_DEBUG 47 #undef BT_DBG 48 #define BT_DBG(D...) 49 #endif 50 51 static int cmtp_sock_release(struct socket *sock) 52 { 53 struct sock *sk = sock->sk; 54 55 BT_DBG("sock %p sk %p", sock, sk); 56 57 if (!sk) 58 return 0; 59 60 sock_orphan(sk); 61 sock_put(sk); 62 63 return 0; 64 } 65 66 static int cmtp_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 67 { 68 struct cmtp_connadd_req ca; 69 struct cmtp_conndel_req cd; 70 struct cmtp_connlist_req cl; 71 struct cmtp_conninfo ci; 72 struct socket *nsock; 73 void __user *argp = (void __user *)arg; 74 int err; 75 76 BT_DBG("cmd %x arg %lx", cmd, arg); 77 78 switch (cmd) { 79 case CMTPCONNADD: 80 if (!capable(CAP_NET_ADMIN)) 81 return -EACCES; 82 83 if (copy_from_user(&ca, argp, sizeof(ca))) 84 return -EFAULT; 85 86 nsock = sockfd_lookup(ca.sock, &err); 87 if (!nsock) 88 return err; 89 90 if (nsock->sk->sk_state != BT_CONNECTED) { 91 fput(nsock->file); 92 return -EBADFD; 93 } 94 95 err = cmtp_add_connection(&ca, nsock); 96 if (!err) { 97 if (copy_to_user(argp, &ca, sizeof(ca))) 98 err = -EFAULT; 99 } else 100 fput(nsock->file); 101 102 return err; 103 104 case CMTPCONNDEL: 105 if (!capable(CAP_NET_ADMIN)) 106 return -EACCES; 107 108 if (copy_from_user(&cd, argp, sizeof(cd))) 109 return -EFAULT; 110 111 return cmtp_del_connection(&cd); 112 113 case CMTPGETCONNLIST: 114 if (copy_from_user(&cl, argp, sizeof(cl))) 115 return -EFAULT; 116 117 if (cl.cnum <= 0) 118 return -EINVAL; 119 120 err = cmtp_get_connlist(&cl); 121 if (!err && copy_to_user(argp, &cl, sizeof(cl))) 122 return -EFAULT; 123 124 return err; 125 126 case CMTPGETCONNINFO: 127 if (copy_from_user(&ci, argp, sizeof(ci))) 128 return -EFAULT; 129 130 err = cmtp_get_conninfo(&ci); 131 if (!err && copy_to_user(argp, &ci, sizeof(ci))) 132 return -EFAULT; 133 134 return err; 135 } 136 137 return -EINVAL; 138 } 139 140 static const struct proto_ops cmtp_sock_ops = { 141 .family = PF_BLUETOOTH, 142 .owner = THIS_MODULE, 143 .release = cmtp_sock_release, 144 .ioctl = cmtp_sock_ioctl, 145 .bind = sock_no_bind, 146 .getname = sock_no_getname, 147 .sendmsg = sock_no_sendmsg, 148 .recvmsg = sock_no_recvmsg, 149 .poll = sock_no_poll, 150 .listen = sock_no_listen, 151 .shutdown = sock_no_shutdown, 152 .setsockopt = sock_no_setsockopt, 153 .getsockopt = sock_no_getsockopt, 154 .connect = sock_no_connect, 155 .socketpair = sock_no_socketpair, 156 .accept = sock_no_accept, 157 .mmap = sock_no_mmap 158 }; 159 160 static struct proto cmtp_proto = { 161 .name = "CMTP", 162 .owner = THIS_MODULE, 163 .obj_size = sizeof(struct bt_sock) 164 }; 165 166 static int cmtp_sock_create(struct socket *sock, int protocol) 167 { 168 struct sock *sk; 169 170 BT_DBG("sock %p", sock); 171 172 if (sock->type != SOCK_RAW) 173 return -ESOCKTNOSUPPORT; 174 175 sk = sk_alloc(PF_BLUETOOTH, GFP_KERNEL, &cmtp_proto, 1); 176 if (!sk) 177 return -ENOMEM; 178 179 sock_init_data(sock, sk); 180 181 sock->ops = &cmtp_sock_ops; 182 183 sock->state = SS_UNCONNECTED; 184 185 sock_reset_flag(sk, SOCK_ZAPPED); 186 187 sk->sk_protocol = protocol; 188 sk->sk_state = BT_OPEN; 189 190 return 0; 191 } 192 193 static struct net_proto_family cmtp_sock_family_ops = { 194 .family = PF_BLUETOOTH, 195 .owner = THIS_MODULE, 196 .create = cmtp_sock_create 197 }; 198 199 int cmtp_init_sockets(void) 200 { 201 int err; 202 203 err = proto_register(&cmtp_proto, 0); 204 if (err < 0) 205 return err; 206 207 err = bt_sock_register(BTPROTO_CMTP, &cmtp_sock_family_ops); 208 if (err < 0) 209 goto error; 210 211 return 0; 212 213 error: 214 BT_ERR("Can't register CMTP socket"); 215 proto_unregister(&cmtp_proto); 216 return err; 217 } 218 219 void cmtp_cleanup_sockets(void) 220 { 221 if (bt_sock_unregister(BTPROTO_CMTP) < 0) 222 BT_ERR("Can't unregister CMTP socket"); 223 224 proto_unregister(&cmtp_proto); 225 } 226