1 /* 2 HIDP implementation for Linux Bluetooth stack (BlueZ). 3 Copyright (C) 2003-2004 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/export.h> 24 #include <linux/file.h> 25 26 #include "hidp.h" 27 28 static struct bt_sock_list hidp_sk_list = { 29 .lock = __RW_LOCK_UNLOCKED(hidp_sk_list.lock) 30 }; 31 32 static int hidp_sock_release(struct socket *sock) 33 { 34 struct sock *sk = sock->sk; 35 36 BT_DBG("sock %p sk %p", sock, sk); 37 38 if (!sk) 39 return 0; 40 41 bt_sock_unlink(&hidp_sk_list, sk); 42 43 sock_orphan(sk); 44 sock_put(sk); 45 46 return 0; 47 } 48 49 static int hidp_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 50 { 51 void __user *argp = (void __user *) arg; 52 struct hidp_connadd_req ca; 53 struct hidp_conndel_req cd; 54 struct hidp_connlist_req cl; 55 struct hidp_conninfo ci; 56 struct socket *csock; 57 struct socket *isock; 58 int err; 59 60 BT_DBG("cmd %x arg %lx", cmd, arg); 61 62 switch (cmd) { 63 case HIDPCONNADD: 64 if (!capable(CAP_NET_ADMIN)) 65 return -EPERM; 66 67 if (copy_from_user(&ca, argp, sizeof(ca))) 68 return -EFAULT; 69 70 csock = sockfd_lookup(ca.ctrl_sock, &err); 71 if (!csock) 72 return err; 73 74 isock = sockfd_lookup(ca.intr_sock, &err); 75 if (!isock) { 76 sockfd_put(csock); 77 return err; 78 } 79 80 err = hidp_connection_add(&ca, csock, isock); 81 if (!err && copy_to_user(argp, &ca, sizeof(ca))) 82 err = -EFAULT; 83 84 sockfd_put(csock); 85 sockfd_put(isock); 86 87 return err; 88 89 case HIDPCONNDEL: 90 if (!capable(CAP_NET_ADMIN)) 91 return -EPERM; 92 93 if (copy_from_user(&cd, argp, sizeof(cd))) 94 return -EFAULT; 95 96 return hidp_connection_del(&cd); 97 98 case HIDPGETCONNLIST: 99 if (copy_from_user(&cl, argp, sizeof(cl))) 100 return -EFAULT; 101 102 if (cl.cnum <= 0) 103 return -EINVAL; 104 105 err = hidp_get_connlist(&cl); 106 if (!err && copy_to_user(argp, &cl, sizeof(cl))) 107 return -EFAULT; 108 109 return err; 110 111 case HIDPGETCONNINFO: 112 if (copy_from_user(&ci, argp, sizeof(ci))) 113 return -EFAULT; 114 115 err = hidp_get_conninfo(&ci); 116 if (!err && copy_to_user(argp, &ci, sizeof(ci))) 117 return -EFAULT; 118 119 return err; 120 } 121 122 return -EINVAL; 123 } 124 125 #ifdef CONFIG_COMPAT 126 struct compat_hidp_connadd_req { 127 int ctrl_sock; /* Connected control socket */ 128 int intr_sock; /* Connected interrupt socket */ 129 __u16 parser; 130 __u16 rd_size; 131 compat_uptr_t rd_data; 132 __u8 country; 133 __u8 subclass; 134 __u16 vendor; 135 __u16 product; 136 __u16 version; 137 __u32 flags; 138 __u32 idle_to; 139 char name[128]; 140 }; 141 142 static int hidp_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 143 { 144 if (cmd == HIDPGETCONNLIST) { 145 struct hidp_connlist_req cl; 146 u32 uci; 147 int err; 148 149 if (get_user(cl.cnum, (u32 __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 = hidp_get_connlist(&cl); 159 160 if (!err && put_user(cl.cnum, (u32 __user *) arg)) 161 err = -EFAULT; 162 163 return err; 164 } else if (cmd == HIDPCONNADD) { 165 struct compat_hidp_connadd_req ca; 166 struct hidp_connadd_req __user *uca; 167 168 uca = compat_alloc_user_space(sizeof(*uca)); 169 170 if (copy_from_user(&ca, (void __user *) arg, sizeof(ca))) 171 return -EFAULT; 172 173 if (put_user(ca.ctrl_sock, &uca->ctrl_sock) || 174 put_user(ca.intr_sock, &uca->intr_sock) || 175 put_user(ca.parser, &uca->parser) || 176 put_user(ca.rd_size, &uca->rd_size) || 177 put_user(compat_ptr(ca.rd_data), &uca->rd_data) || 178 put_user(ca.country, &uca->country) || 179 put_user(ca.subclass, &uca->subclass) || 180 put_user(ca.vendor, &uca->vendor) || 181 put_user(ca.product, &uca->product) || 182 put_user(ca.version, &uca->version) || 183 put_user(ca.flags, &uca->flags) || 184 put_user(ca.idle_to, &uca->idle_to) || 185 copy_to_user(&uca->name[0], &ca.name[0], 128)) 186 return -EFAULT; 187 188 arg = (unsigned long) uca; 189 190 /* Fall through. We don't actually write back any _changes_ 191 to the structure anyway, so there's no need to copy back 192 into the original compat version */ 193 } 194 195 return hidp_sock_ioctl(sock, cmd, arg); 196 } 197 #endif 198 199 static const struct proto_ops hidp_sock_ops = { 200 .family = PF_BLUETOOTH, 201 .owner = THIS_MODULE, 202 .release = hidp_sock_release, 203 .ioctl = hidp_sock_ioctl, 204 #ifdef CONFIG_COMPAT 205 .compat_ioctl = hidp_sock_compat_ioctl, 206 #endif 207 .bind = sock_no_bind, 208 .getname = sock_no_getname, 209 .sendmsg = sock_no_sendmsg, 210 .recvmsg = sock_no_recvmsg, 211 .poll = sock_no_poll, 212 .listen = sock_no_listen, 213 .shutdown = sock_no_shutdown, 214 .setsockopt = sock_no_setsockopt, 215 .getsockopt = sock_no_getsockopt, 216 .connect = sock_no_connect, 217 .socketpair = sock_no_socketpair, 218 .accept = sock_no_accept, 219 .mmap = sock_no_mmap 220 }; 221 222 static struct proto hidp_proto = { 223 .name = "HIDP", 224 .owner = THIS_MODULE, 225 .obj_size = sizeof(struct bt_sock) 226 }; 227 228 static int hidp_sock_create(struct net *net, struct socket *sock, int protocol, 229 int kern) 230 { 231 struct sock *sk; 232 233 BT_DBG("sock %p", sock); 234 235 if (sock->type != SOCK_RAW) 236 return -ESOCKTNOSUPPORT; 237 238 sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &hidp_proto); 239 if (!sk) 240 return -ENOMEM; 241 242 sock_init_data(sock, sk); 243 244 sock->ops = &hidp_sock_ops; 245 246 sock->state = SS_UNCONNECTED; 247 248 sock_reset_flag(sk, SOCK_ZAPPED); 249 250 sk->sk_protocol = protocol; 251 sk->sk_state = BT_OPEN; 252 253 bt_sock_link(&hidp_sk_list, sk); 254 255 return 0; 256 } 257 258 static const struct net_proto_family hidp_sock_family_ops = { 259 .family = PF_BLUETOOTH, 260 .owner = THIS_MODULE, 261 .create = hidp_sock_create 262 }; 263 264 int __init hidp_init_sockets(void) 265 { 266 int err; 267 268 err = proto_register(&hidp_proto, 0); 269 if (err < 0) 270 return err; 271 272 err = bt_sock_register(BTPROTO_HIDP, &hidp_sock_family_ops); 273 if (err < 0) { 274 BT_ERR("Can't register HIDP socket"); 275 goto error; 276 } 277 278 err = bt_procfs_init(&init_net, "hidp", &hidp_sk_list, NULL); 279 if (err < 0) { 280 BT_ERR("Failed to create HIDP proc file"); 281 bt_sock_unregister(BTPROTO_HIDP); 282 goto error; 283 } 284 285 BT_INFO("HIDP socket layer initialized"); 286 287 return 0; 288 289 error: 290 proto_unregister(&hidp_proto); 291 return err; 292 } 293 294 void __exit hidp_cleanup_sockets(void) 295 { 296 bt_procfs_cleanup(&init_net, "hidp"); 297 bt_sock_unregister(BTPROTO_HIDP); 298 proto_unregister(&hidp_proto); 299 } 300