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1da177e4 LT |
1 | /* |
2 | BNEP implementation for Linux Bluetooth stack (BlueZ). | |
3 | Copyright (C) 2001-2002 Inventel Systemes | |
4 | Written 2001-2002 by | |
5 | David Libault <david.libault@inventel.fr> | |
6 | ||
7 | Copyright (C) 2002 Maxim Krasnyansky <maxk@qualcomm.com> | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License version 2 as | |
11 | published by the Free Software Foundation; | |
12 | ||
13 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
14 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
15 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. | |
16 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY | |
17 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES | |
18 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
19 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
20 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
21 | ||
22 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, | |
23 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
24 | SOFTWARE IS DISCLAIMED. | |
25 | */ | |
26 | ||
27 | /* | |
28 | * $Id: sock.c,v 1.4 2002/08/04 21:23:58 maxk Exp $ | |
29 | */ | |
30 | ||
1da177e4 LT |
31 | #include <linux/module.h> |
32 | ||
33 | #include <linux/types.h> | |
4fc268d2 | 34 | #include <linux/capability.h> |
1da177e4 LT |
35 | #include <linux/errno.h> |
36 | #include <linux/kernel.h> | |
1da177e4 LT |
37 | #include <linux/sched.h> |
38 | #include <linux/slab.h> | |
39 | #include <linux/poll.h> | |
40 | #include <linux/fcntl.h> | |
41 | #include <linux/skbuff.h> | |
42 | #include <linux/socket.h> | |
43 | #include <linux/ioctl.h> | |
44 | #include <linux/file.h> | |
45 | #include <linux/init.h> | |
e9c5702e | 46 | #include <linux/compat.h> |
1da177e4 LT |
47 | #include <net/sock.h> |
48 | ||
49 | #include <asm/system.h> | |
50 | #include <asm/uaccess.h> | |
51 | ||
52 | #include "bnep.h" | |
53 | ||
54 | #ifndef CONFIG_BT_BNEP_DEBUG | |
55 | #undef BT_DBG | |
56 | #define BT_DBG( A... ) | |
57 | #endif | |
58 | ||
59 | static int bnep_sock_release(struct socket *sock) | |
60 | { | |
61 | struct sock *sk = sock->sk; | |
62 | ||
63 | BT_DBG("sock %p sk %p", sock, sk); | |
64 | ||
65 | if (!sk) | |
66 | return 0; | |
67 | ||
68 | sock_orphan(sk); | |
69 | sock_put(sk); | |
70 | return 0; | |
71 | } | |
72 | ||
73 | static int bnep_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
74 | { | |
75 | struct bnep_connlist_req cl; | |
76 | struct bnep_connadd_req ca; | |
77 | struct bnep_conndel_req cd; | |
78 | struct bnep_conninfo ci; | |
79 | struct socket *nsock; | |
80 | void __user *argp = (void __user *)arg; | |
81 | int err; | |
82 | ||
83 | BT_DBG("cmd %x arg %lx", cmd, arg); | |
84 | ||
85 | switch (cmd) { | |
86 | case BNEPCONNADD: | |
87 | if (!capable(CAP_NET_ADMIN)) | |
88 | return -EACCES; | |
89 | ||
90 | if (copy_from_user(&ca, argp, sizeof(ca))) | |
91 | return -EFAULT; | |
92 | ||
93 | nsock = sockfd_lookup(ca.sock, &err); | |
94 | if (!nsock) | |
95 | return err; | |
96 | ||
97 | if (nsock->sk->sk_state != BT_CONNECTED) { | |
98 | fput(nsock->file); | |
99 | return -EBADFD; | |
100 | } | |
101 | ||
102 | err = bnep_add_connection(&ca, nsock); | |
103 | if (!err) { | |
104 | if (copy_to_user(argp, &ca, sizeof(ca))) | |
105 | err = -EFAULT; | |
106 | } else | |
107 | fput(nsock->file); | |
108 | ||
109 | return err; | |
110 | ||
111 | case BNEPCONNDEL: | |
112 | if (!capable(CAP_NET_ADMIN)) | |
113 | return -EACCES; | |
114 | ||
115 | if (copy_from_user(&cd, argp, sizeof(cd))) | |
116 | return -EFAULT; | |
117 | ||
118 | return bnep_del_connection(&cd); | |
119 | ||
120 | case BNEPGETCONNLIST: | |
121 | if (copy_from_user(&cl, argp, sizeof(cl))) | |
122 | return -EFAULT; | |
123 | ||
124 | if (cl.cnum <= 0) | |
125 | return -EINVAL; | |
126 | ||
127 | err = bnep_get_connlist(&cl); | |
128 | if (!err && copy_to_user(argp, &cl, sizeof(cl))) | |
129 | return -EFAULT; | |
130 | ||
131 | return err; | |
132 | ||
133 | case BNEPGETCONNINFO: | |
134 | if (copy_from_user(&ci, argp, sizeof(ci))) | |
135 | return -EFAULT; | |
136 | ||
137 | err = bnep_get_conninfo(&ci); | |
138 | if (!err && copy_to_user(argp, &ci, sizeof(ci))) | |
139 | return -EFAULT; | |
140 | ||
141 | return err; | |
142 | ||
143 | default: | |
144 | return -EINVAL; | |
145 | } | |
146 | ||
147 | return 0; | |
148 | } | |
149 | ||
e9c5702e MH |
150 | #ifdef CONFIG_COMPAT |
151 | static int bnep_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
152 | { | |
153 | if (cmd == BNEPGETCONNLIST) { | |
154 | struct bnep_connlist_req cl; | |
155 | uint32_t uci; | |
156 | int err; | |
157 | ||
158 | if (get_user(cl.cnum, (uint32_t __user *) arg) || | |
159 | get_user(uci, (u32 __user *) (arg + 4))) | |
160 | return -EFAULT; | |
161 | ||
162 | cl.ci = compat_ptr(uci); | |
163 | ||
164 | if (cl.cnum <= 0) | |
165 | return -EINVAL; | |
166 | ||
167 | err = bnep_get_connlist(&cl); | |
168 | ||
169 | if (!err && put_user(cl.cnum, (uint32_t __user *) arg)) | |
170 | err = -EFAULT; | |
171 | ||
172 | return err; | |
173 | } | |
174 | ||
175 | return bnep_sock_ioctl(sock, cmd, arg); | |
176 | } | |
177 | #endif | |
178 | ||
90ddc4f0 | 179 | static const struct proto_ops bnep_sock_ops = { |
e9c5702e MH |
180 | .family = PF_BLUETOOTH, |
181 | .owner = THIS_MODULE, | |
182 | .release = bnep_sock_release, | |
183 | .ioctl = bnep_sock_ioctl, | |
184 | #ifdef CONFIG_COMPAT | |
185 | .compat_ioctl = bnep_sock_compat_ioctl, | |
186 | #endif | |
187 | .bind = sock_no_bind, | |
188 | .getname = sock_no_getname, | |
189 | .sendmsg = sock_no_sendmsg, | |
190 | .recvmsg = sock_no_recvmsg, | |
191 | .poll = sock_no_poll, | |
192 | .listen = sock_no_listen, | |
193 | .shutdown = sock_no_shutdown, | |
194 | .setsockopt = sock_no_setsockopt, | |
195 | .getsockopt = sock_no_getsockopt, | |
196 | .connect = sock_no_connect, | |
197 | .socketpair = sock_no_socketpair, | |
198 | .accept = sock_no_accept, | |
199 | .mmap = sock_no_mmap | |
1da177e4 LT |
200 | }; |
201 | ||
202 | static struct proto bnep_proto = { | |
203 | .name = "BNEP", | |
204 | .owner = THIS_MODULE, | |
205 | .obj_size = sizeof(struct bt_sock) | |
206 | }; | |
207 | ||
208 | static int bnep_sock_create(struct socket *sock, int protocol) | |
209 | { | |
210 | struct sock *sk; | |
211 | ||
212 | BT_DBG("sock %p", sock); | |
213 | ||
214 | if (sock->type != SOCK_RAW) | |
215 | return -ESOCKTNOSUPPORT; | |
216 | ||
217 | sk = sk_alloc(PF_BLUETOOTH, GFP_KERNEL, &bnep_proto, 1); | |
218 | if (!sk) | |
219 | return -ENOMEM; | |
220 | ||
221 | sock_init_data(sock, sk); | |
222 | ||
223 | sock->ops = &bnep_sock_ops; | |
224 | ||
225 | sock->state = SS_UNCONNECTED; | |
226 | ||
227 | sock_reset_flag(sk, SOCK_ZAPPED); | |
228 | ||
229 | sk->sk_protocol = protocol; | |
230 | sk->sk_state = BT_OPEN; | |
231 | ||
232 | return 0; | |
233 | } | |
234 | ||
235 | static struct net_proto_family bnep_sock_family_ops = { | |
236 | .family = PF_BLUETOOTH, | |
237 | .owner = THIS_MODULE, | |
238 | .create = bnep_sock_create | |
239 | }; | |
240 | ||
241 | int __init bnep_sock_init(void) | |
242 | { | |
243 | int err; | |
244 | ||
245 | err = proto_register(&bnep_proto, 0); | |
246 | if (err < 0) | |
247 | return err; | |
248 | ||
249 | err = bt_sock_register(BTPROTO_BNEP, &bnep_sock_family_ops); | |
250 | if (err < 0) | |
251 | goto error; | |
252 | ||
253 | return 0; | |
254 | ||
255 | error: | |
256 | BT_ERR("Can't register BNEP socket"); | |
257 | proto_unregister(&bnep_proto); | |
258 | return err; | |
259 | } | |
260 | ||
261 | int __exit bnep_sock_cleanup(void) | |
262 | { | |
263 | if (bt_sock_unregister(BTPROTO_BNEP) < 0) | |
264 | BT_ERR("Can't unregister BNEP socket"); | |
265 | ||
266 | proto_unregister(&bnep_proto); | |
267 | ||
268 | return 0; | |
269 | } |