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/compat.h> 24 #include <linux/export.h> 25 #include <linux/file.h> 26 27 #include "hidp.h" 28 29 static struct bt_sock_list hidp_sk_list = { 30 .lock = __RW_LOCK_UNLOCKED(hidp_sk_list.lock) 31 }; 32 33 static int hidp_sock_release(struct socket *sock) 34 { 35 struct sock *sk = sock->sk; 36 37 BT_DBG("sock %p sk %p", sock, sk); 38 39 if (!sk) 40 return 0; 41 42 bt_sock_unlink(&hidp_sk_list, sk); 43 44 sock_orphan(sk); 45 sock_put(sk); 46 47 return 0; 48 } 49 50 static int do_hidp_sock_ioctl(struct socket *sock, unsigned int cmd, void __user *argp) 51 { 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 %p", cmd, argp); 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 ca.name[sizeof(ca.name)-1] = 0; 80 81 err = hidp_connection_add(&ca, csock, isock); 82 if (!err && copy_to_user(argp, &ca, sizeof(ca))) 83 err = -EFAULT; 84 85 sockfd_put(csock); 86 sockfd_put(isock); 87 88 return err; 89 90 case HIDPCONNDEL: 91 if (!capable(CAP_NET_ADMIN)) 92 return -EPERM; 93 94 if (copy_from_user(&cd, argp, sizeof(cd))) 95 return -EFAULT; 96 97 return hidp_connection_del(&cd); 98 99 case HIDPGETCONNLIST: 100 if (copy_from_user(&cl, argp, sizeof(cl))) 101 return -EFAULT; 102 103 if (cl.cnum <= 0) 104 return -EINVAL; 105 106 err = hidp_get_connlist(&cl); 107 if (!err && copy_to_user(argp, &cl, sizeof(cl))) 108 return -EFAULT; 109 110 return err; 111 112 case HIDPGETCONNINFO: 113 if (copy_from_user(&ci, argp, sizeof(ci))) 114 return -EFAULT; 115 116 err = hidp_get_conninfo(&ci); 117 if (!err && copy_to_user(argp, &ci, sizeof(ci))) 118 return -EFAULT; 119 120 return err; 121 } 122 123 return -EINVAL; 124 } 125 126 static int hidp_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 127 { 128 return do_hidp_sock_ioctl(sock, cmd, (void __user *)arg); 129 } 130 131 #ifdef CONFIG_COMPAT 132 struct compat_hidp_connadd_req { 133 int ctrl_sock; /* Connected control socket */ 134 int intr_sock; /* Connected interrupt socket */ 135 __u16 parser; 136 __u16 rd_size; 137 compat_uptr_t rd_data; 138 __u8 country; 139 __u8 subclass; 140 __u16 vendor; 141 __u16 product; 142 __u16 version; 143 __u32 flags; 144 __u32 idle_to; 145 char name[128]; 146 }; 147 148 static int hidp_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 149 { 150 void __user *argp = compat_ptr(arg); 151 int err; 152 153 if (cmd == HIDPGETCONNLIST) { 154 struct hidp_connlist_req cl; 155 u32 __user *p = argp; 156 u32 uci; 157 158 if (get_user(cl.cnum, p) || get_user(uci, p + 1)) 159 return -EFAULT; 160 161 cl.ci = compat_ptr(uci); 162 163 if (cl.cnum <= 0) 164 return -EINVAL; 165 166 err = hidp_get_connlist(&cl); 167 168 if (!err && put_user(cl.cnum, p)) 169 err = -EFAULT; 170 171 return err; 172 } else if (cmd == HIDPCONNADD) { 173 struct compat_hidp_connadd_req ca32; 174 struct hidp_connadd_req ca; 175 struct socket *csock; 176 struct socket *isock; 177 178 if (!capable(CAP_NET_ADMIN)) 179 return -EPERM; 180 181 if (copy_from_user(&ca32, (void __user *) arg, sizeof(ca32))) 182 return -EFAULT; 183 184 ca.ctrl_sock = ca32.ctrl_sock; 185 ca.intr_sock = ca32.intr_sock; 186 ca.parser = ca32.parser; 187 ca.rd_size = ca32.rd_size; 188 ca.rd_data = compat_ptr(ca32.rd_data); 189 ca.country = ca32.country; 190 ca.subclass = ca32.subclass; 191 ca.vendor = ca32.vendor; 192 ca.product = ca32.product; 193 ca.version = ca32.version; 194 ca.flags = ca32.flags; 195 ca.idle_to = ca32.idle_to; 196 ca32.name[sizeof(ca32.name) - 1] = '\0'; 197 memcpy(ca.name, ca32.name, 128); 198 199 csock = sockfd_lookup(ca.ctrl_sock, &err); 200 if (!csock) 201 return err; 202 203 isock = sockfd_lookup(ca.intr_sock, &err); 204 if (!isock) { 205 sockfd_put(csock); 206 return err; 207 } 208 209 err = hidp_connection_add(&ca, csock, isock); 210 if (!err && copy_to_user(argp, &ca32, sizeof(ca32))) 211 err = -EFAULT; 212 213 sockfd_put(csock); 214 sockfd_put(isock); 215 216 return err; 217 } 218 219 return hidp_sock_ioctl(sock, cmd, arg); 220 } 221 #endif 222 223 static const struct proto_ops hidp_sock_ops = { 224 .family = PF_BLUETOOTH, 225 .owner = THIS_MODULE, 226 .release = hidp_sock_release, 227 .ioctl = hidp_sock_ioctl, 228 #ifdef CONFIG_COMPAT 229 .compat_ioctl = hidp_sock_compat_ioctl, 230 #endif 231 .bind = sock_no_bind, 232 .getname = sock_no_getname, 233 .sendmsg = sock_no_sendmsg, 234 .recvmsg = sock_no_recvmsg, 235 .listen = sock_no_listen, 236 .shutdown = sock_no_shutdown, 237 .connect = sock_no_connect, 238 .socketpair = sock_no_socketpair, 239 .accept = sock_no_accept, 240 .mmap = sock_no_mmap 241 }; 242 243 static struct proto hidp_proto = { 244 .name = "HIDP", 245 .owner = THIS_MODULE, 246 .obj_size = sizeof(struct bt_sock) 247 }; 248 249 static int hidp_sock_create(struct net *net, struct socket *sock, int protocol, 250 int kern) 251 { 252 struct sock *sk; 253 254 BT_DBG("sock %p", sock); 255 256 if (sock->type != SOCK_RAW) 257 return -ESOCKTNOSUPPORT; 258 259 sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &hidp_proto, kern); 260 if (!sk) 261 return -ENOMEM; 262 263 sock_init_data(sock, sk); 264 265 sock->ops = &hidp_sock_ops; 266 267 sock->state = SS_UNCONNECTED; 268 269 sock_reset_flag(sk, SOCK_ZAPPED); 270 271 sk->sk_protocol = protocol; 272 sk->sk_state = BT_OPEN; 273 274 bt_sock_link(&hidp_sk_list, sk); 275 276 return 0; 277 } 278 279 static const struct net_proto_family hidp_sock_family_ops = { 280 .family = PF_BLUETOOTH, 281 .owner = THIS_MODULE, 282 .create = hidp_sock_create 283 }; 284 285 int __init hidp_init_sockets(void) 286 { 287 int err; 288 289 err = proto_register(&hidp_proto, 0); 290 if (err < 0) 291 return err; 292 293 err = bt_sock_register(BTPROTO_HIDP, &hidp_sock_family_ops); 294 if (err < 0) { 295 BT_ERR("Can't register HIDP socket"); 296 goto error; 297 } 298 299 err = bt_procfs_init(&init_net, "hidp", &hidp_sk_list, NULL); 300 if (err < 0) { 301 BT_ERR("Failed to create HIDP proc file"); 302 bt_sock_unregister(BTPROTO_HIDP); 303 goto error; 304 } 305 306 BT_INFO("HIDP socket layer initialized"); 307 308 return 0; 309 310 error: 311 proto_unregister(&hidp_proto); 312 return err; 313 } 314 315 void __exit hidp_cleanup_sockets(void) 316 { 317 bt_procfs_cleanup(&init_net, "hidp"); 318 bt_sock_unregister(BTPROTO_HIDP); 319 proto_unregister(&hidp_proto); 320 } 321