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 79 err = hidp_connection_add(&ca, csock, isock); 80 if (!err && copy_to_user(argp, &ca, sizeof(ca))) 81 err = -EFAULT; 82 83 sockfd_put(csock); 84 sockfd_put(isock); 85 86 return err; 87 88 case HIDPCONNDEL: 89 if (!capable(CAP_NET_ADMIN)) 90 return -EPERM; 91 92 if (copy_from_user(&cd, argp, sizeof(cd))) 93 return -EFAULT; 94 95 return hidp_connection_del(&cd); 96 97 case HIDPGETCONNLIST: 98 if (copy_from_user(&cl, argp, sizeof(cl))) 99 return -EFAULT; 100 101 if (cl.cnum <= 0) 102 return -EINVAL; 103 104 err = hidp_get_connlist(&cl); 105 if (!err && copy_to_user(argp, &cl, sizeof(cl))) 106 return -EFAULT; 107 108 return err; 109 110 case HIDPGETCONNINFO: 111 if (copy_from_user(&ci, argp, sizeof(ci))) 112 return -EFAULT; 113 114 err = hidp_get_conninfo(&ci); 115 if (!err && copy_to_user(argp, &ci, sizeof(ci))) 116 return -EFAULT; 117 118 return err; 119 } 120 121 return -EINVAL; 122 } 123 124 static int hidp_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 125 { 126 return do_hidp_sock_ioctl(sock, cmd, (void __user *)arg); 127 } 128 129 #ifdef CONFIG_COMPAT 130 struct compat_hidp_connadd_req { 131 int ctrl_sock; /* Connected control socket */ 132 int intr_sock; /* Connected interrupt socket */ 133 __u16 parser; 134 __u16 rd_size; 135 compat_uptr_t rd_data; 136 __u8 country; 137 __u8 subclass; 138 __u16 vendor; 139 __u16 product; 140 __u16 version; 141 __u32 flags; 142 __u32 idle_to; 143 char name[128]; 144 }; 145 146 static int hidp_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 147 { 148 void __user *argp = compat_ptr(arg); 149 int err; 150 151 if (cmd == HIDPGETCONNLIST) { 152 struct hidp_connlist_req cl; 153 u32 __user *p = argp; 154 u32 uci; 155 156 if (get_user(cl.cnum, p) || get_user(uci, p + 1)) 157 return -EFAULT; 158 159 cl.ci = compat_ptr(uci); 160 161 if (cl.cnum <= 0) 162 return -EINVAL; 163 164 err = hidp_get_connlist(&cl); 165 166 if (!err && put_user(cl.cnum, p)) 167 err = -EFAULT; 168 169 return err; 170 } else if (cmd == HIDPCONNADD) { 171 struct compat_hidp_connadd_req ca32; 172 struct hidp_connadd_req ca; 173 struct socket *csock; 174 struct socket *isock; 175 176 if (!capable(CAP_NET_ADMIN)) 177 return -EPERM; 178 179 if (copy_from_user(&ca32, (void __user *) arg, sizeof(ca32))) 180 return -EFAULT; 181 182 ca.ctrl_sock = ca32.ctrl_sock; 183 ca.intr_sock = ca32.intr_sock; 184 ca.parser = ca32.parser; 185 ca.rd_size = ca32.rd_size; 186 ca.rd_data = compat_ptr(ca32.rd_data); 187 ca.country = ca32.country; 188 ca.subclass = ca32.subclass; 189 ca.vendor = ca32.vendor; 190 ca.product = ca32.product; 191 ca.version = ca32.version; 192 ca.flags = ca32.flags; 193 ca.idle_to = ca32.idle_to; 194 memcpy(ca.name, ca32.name, 128); 195 196 csock = sockfd_lookup(ca.ctrl_sock, &err); 197 if (!csock) 198 return err; 199 200 isock = sockfd_lookup(ca.intr_sock, &err); 201 if (!isock) { 202 sockfd_put(csock); 203 return err; 204 } 205 206 err = hidp_connection_add(&ca, csock, isock); 207 if (!err && copy_to_user(argp, &ca32, sizeof(ca32))) 208 err = -EFAULT; 209 210 sockfd_put(csock); 211 sockfd_put(isock); 212 213 return err; 214 } 215 216 return hidp_sock_ioctl(sock, cmd, arg); 217 } 218 #endif 219 220 static const struct proto_ops hidp_sock_ops = { 221 .family = PF_BLUETOOTH, 222 .owner = THIS_MODULE, 223 .release = hidp_sock_release, 224 .ioctl = hidp_sock_ioctl, 225 #ifdef CONFIG_COMPAT 226 .compat_ioctl = hidp_sock_compat_ioctl, 227 #endif 228 .bind = sock_no_bind, 229 .getname = sock_no_getname, 230 .sendmsg = sock_no_sendmsg, 231 .recvmsg = sock_no_recvmsg, 232 .listen = sock_no_listen, 233 .shutdown = sock_no_shutdown, 234 .setsockopt = sock_no_setsockopt, 235 .getsockopt = sock_no_getsockopt, 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