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 do_hidp_sock_ioctl(struct socket *sock, unsigned int cmd, void __user *argp) 50 { 51 struct hidp_connadd_req ca; 52 struct hidp_conndel_req cd; 53 struct hidp_connlist_req cl; 54 struct hidp_conninfo ci; 55 struct socket *csock; 56 struct socket *isock; 57 int err; 58 59 BT_DBG("cmd %x arg %p", cmd, argp); 60 61 switch (cmd) { 62 case HIDPCONNADD: 63 if (!capable(CAP_NET_ADMIN)) 64 return -EPERM; 65 66 if (copy_from_user(&ca, argp, sizeof(ca))) 67 return -EFAULT; 68 69 csock = sockfd_lookup(ca.ctrl_sock, &err); 70 if (!csock) 71 return err; 72 73 isock = sockfd_lookup(ca.intr_sock, &err); 74 if (!isock) { 75 sockfd_put(csock); 76 return err; 77 } 78 ca.name[sizeof(ca.name)-1] = 0; 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 static int hidp_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 126 { 127 return do_hidp_sock_ioctl(sock, cmd, (void __user *)arg); 128 } 129 130 #ifdef CONFIG_COMPAT 131 struct compat_hidp_connadd_req { 132 int ctrl_sock; /* Connected control socket */ 133 int intr_sock; /* Connected interrupt socket */ 134 __u16 parser; 135 __u16 rd_size; 136 compat_uptr_t rd_data; 137 __u8 country; 138 __u8 subclass; 139 __u16 vendor; 140 __u16 product; 141 __u16 version; 142 __u32 flags; 143 __u32 idle_to; 144 char name[128]; 145 }; 146 147 static int hidp_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 148 { 149 void __user *argp = compat_ptr(arg); 150 int err; 151 152 if (cmd == HIDPGETCONNLIST) { 153 struct hidp_connlist_req cl; 154 u32 __user *p = argp; 155 u32 uci; 156 157 if (get_user(cl.cnum, p) || get_user(uci, p + 1)) 158 return -EFAULT; 159 160 cl.ci = compat_ptr(uci); 161 162 if (cl.cnum <= 0) 163 return -EINVAL; 164 165 err = hidp_get_connlist(&cl); 166 167 if (!err && put_user(cl.cnum, p)) 168 err = -EFAULT; 169 170 return err; 171 } else if (cmd == HIDPCONNADD) { 172 struct compat_hidp_connadd_req ca32; 173 struct hidp_connadd_req ca; 174 struct socket *csock; 175 struct socket *isock; 176 177 if (!capable(CAP_NET_ADMIN)) 178 return -EPERM; 179 180 if (copy_from_user(&ca32, (void __user *) arg, sizeof(ca32))) 181 return -EFAULT; 182 183 ca.ctrl_sock = ca32.ctrl_sock; 184 ca.intr_sock = ca32.intr_sock; 185 ca.parser = ca32.parser; 186 ca.rd_size = ca32.rd_size; 187 ca.rd_data = compat_ptr(ca32.rd_data); 188 ca.country = ca32.country; 189 ca.subclass = ca32.subclass; 190 ca.vendor = ca32.vendor; 191 ca.product = ca32.product; 192 ca.version = ca32.version; 193 ca.flags = ca32.flags; 194 ca.idle_to = ca32.idle_to; 195 ca32.name[sizeof(ca32.name) - 1] = '\0'; 196 memcpy(ca.name, ca32.name, 128); 197 198 csock = sockfd_lookup(ca.ctrl_sock, &err); 199 if (!csock) 200 return err; 201 202 isock = sockfd_lookup(ca.intr_sock, &err); 203 if (!isock) { 204 sockfd_put(csock); 205 return err; 206 } 207 208 err = hidp_connection_add(&ca, csock, isock); 209 if (!err && copy_to_user(argp, &ca32, sizeof(ca32))) 210 err = -EFAULT; 211 212 sockfd_put(csock); 213 sockfd_put(isock); 214 215 return err; 216 } 217 218 return hidp_sock_ioctl(sock, cmd, arg); 219 } 220 #endif 221 222 static const struct proto_ops hidp_sock_ops = { 223 .family = PF_BLUETOOTH, 224 .owner = THIS_MODULE, 225 .release = hidp_sock_release, 226 .ioctl = hidp_sock_ioctl, 227 #ifdef CONFIG_COMPAT 228 .compat_ioctl = hidp_sock_compat_ioctl, 229 #endif 230 .bind = sock_no_bind, 231 .getname = sock_no_getname, 232 .sendmsg = sock_no_sendmsg, 233 .recvmsg = sock_no_recvmsg, 234 .listen = sock_no_listen, 235 .shutdown = sock_no_shutdown, 236 .connect = sock_no_connect, 237 .socketpair = sock_no_socketpair, 238 .accept = sock_no_accept, 239 .mmap = sock_no_mmap 240 }; 241 242 static struct proto hidp_proto = { 243 .name = "HIDP", 244 .owner = THIS_MODULE, 245 .obj_size = sizeof(struct bt_sock) 246 }; 247 248 static int hidp_sock_create(struct net *net, struct socket *sock, int protocol, 249 int kern) 250 { 251 struct sock *sk; 252 253 BT_DBG("sock %p", sock); 254 255 if (sock->type != SOCK_RAW) 256 return -ESOCKTNOSUPPORT; 257 258 sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &hidp_proto, kern); 259 if (!sk) 260 return -ENOMEM; 261 262 sock_init_data(sock, sk); 263 264 sock->ops = &hidp_sock_ops; 265 266 sock->state = SS_UNCONNECTED; 267 268 sock_reset_flag(sk, SOCK_ZAPPED); 269 270 sk->sk_protocol = protocol; 271 sk->sk_state = BT_OPEN; 272 273 bt_sock_link(&hidp_sk_list, sk); 274 275 return 0; 276 } 277 278 static const struct net_proto_family hidp_sock_family_ops = { 279 .family = PF_BLUETOOTH, 280 .owner = THIS_MODULE, 281 .create = hidp_sock_create 282 }; 283 284 int __init hidp_init_sockets(void) 285 { 286 int err; 287 288 err = proto_register(&hidp_proto, 0); 289 if (err < 0) 290 return err; 291 292 err = bt_sock_register(BTPROTO_HIDP, &hidp_sock_family_ops); 293 if (err < 0) { 294 BT_ERR("Can't register HIDP socket"); 295 goto error; 296 } 297 298 err = bt_procfs_init(&init_net, "hidp", &hidp_sk_list, NULL); 299 if (err < 0) { 300 BT_ERR("Failed to create HIDP proc file"); 301 bt_sock_unregister(BTPROTO_HIDP); 302 goto error; 303 } 304 305 BT_INFO("HIDP socket layer initialized"); 306 307 return 0; 308 309 error: 310 proto_unregister(&hidp_proto); 311 return err; 312 } 313 314 void __exit hidp_cleanup_sockets(void) 315 { 316 bt_procfs_cleanup(&init_net, "hidp"); 317 bt_sock_unregister(BTPROTO_HIDP); 318 proto_unregister(&hidp_proto); 319 } 320