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 memcpy(ca.name, ca32.name, 128); 196 197 csock = sockfd_lookup(ca.ctrl_sock, &err); 198 if (!csock) 199 return err; 200 201 isock = sockfd_lookup(ca.intr_sock, &err); 202 if (!isock) { 203 sockfd_put(csock); 204 return err; 205 } 206 207 err = hidp_connection_add(&ca, csock, isock); 208 if (!err && copy_to_user(argp, &ca32, sizeof(ca32))) 209 err = -EFAULT; 210 211 sockfd_put(csock); 212 sockfd_put(isock); 213 214 return err; 215 } 216 217 return hidp_sock_ioctl(sock, cmd, arg); 218 } 219 #endif 220 221 static const struct proto_ops hidp_sock_ops = { 222 .family = PF_BLUETOOTH, 223 .owner = THIS_MODULE, 224 .release = hidp_sock_release, 225 .ioctl = hidp_sock_ioctl, 226 #ifdef CONFIG_COMPAT 227 .compat_ioctl = hidp_sock_compat_ioctl, 228 #endif 229 .bind = sock_no_bind, 230 .getname = sock_no_getname, 231 .sendmsg = sock_no_sendmsg, 232 .recvmsg = sock_no_recvmsg, 233 .listen = sock_no_listen, 234 .shutdown = sock_no_shutdown, 235 .setsockopt = sock_no_setsockopt, 236 .getsockopt = sock_no_getsockopt, 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