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/net/bluetooth/bnep/sock.c

http://github.com/mirrors/linux
C | 269 lines | 184 code | 60 blank | 25 comment | 32 complexity | 66520dc468a74fadd00e671fc2fec2d8 MD5 | raw file
  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#include <linux/export.h>
 28#include <linux/file.h>
 29
 30#include "bnep.h"
 31
 32static struct bt_sock_list bnep_sk_list = {
 33	.lock = __RW_LOCK_UNLOCKED(bnep_sk_list.lock)
 34};
 35
 36static int bnep_sock_release(struct socket *sock)
 37{
 38	struct sock *sk = sock->sk;
 39
 40	BT_DBG("sock %p sk %p", sock, sk);
 41
 42	if (!sk)
 43		return 0;
 44
 45	bt_sock_unlink(&bnep_sk_list, sk);
 46
 47	sock_orphan(sk);
 48	sock_put(sk);
 49	return 0;
 50}
 51
 52static int do_bnep_sock_ioctl(struct socket *sock, unsigned int cmd, void __user *argp)
 53{
 54	struct bnep_connlist_req cl;
 55	struct bnep_connadd_req  ca;
 56	struct bnep_conndel_req  cd;
 57	struct bnep_conninfo ci;
 58	struct socket *nsock;
 59	__u32 supp_feat = BIT(BNEP_SETUP_RESPONSE);
 60	int err;
 61
 62	BT_DBG("cmd %x arg %p", cmd, argp);
 63
 64	switch (cmd) {
 65	case BNEPCONNADD:
 66		if (!capable(CAP_NET_ADMIN))
 67			return -EPERM;
 68
 69		if (copy_from_user(&ca, argp, sizeof(ca)))
 70			return -EFAULT;
 71
 72		nsock = sockfd_lookup(ca.sock, &err);
 73		if (!nsock)
 74			return err;
 75
 76		if (nsock->sk->sk_state != BT_CONNECTED) {
 77			sockfd_put(nsock);
 78			return -EBADFD;
 79		}
 80		ca.device[sizeof(ca.device)-1] = 0;
 81
 82		err = bnep_add_connection(&ca, nsock);
 83		if (!err) {
 84			if (copy_to_user(argp, &ca, sizeof(ca)))
 85				err = -EFAULT;
 86		} else
 87			sockfd_put(nsock);
 88
 89		return err;
 90
 91	case BNEPCONNDEL:
 92		if (!capable(CAP_NET_ADMIN))
 93			return -EPERM;
 94
 95		if (copy_from_user(&cd, argp, sizeof(cd)))
 96			return -EFAULT;
 97
 98		return bnep_del_connection(&cd);
 99
100	case BNEPGETCONNLIST:
101		if (copy_from_user(&cl, argp, sizeof(cl)))
102			return -EFAULT;
103
104		if (cl.cnum <= 0)
105			return -EINVAL;
106
107		err = bnep_get_connlist(&cl);
108		if (!err && copy_to_user(argp, &cl, sizeof(cl)))
109			return -EFAULT;
110
111		return err;
112
113	case BNEPGETCONNINFO:
114		if (copy_from_user(&ci, argp, sizeof(ci)))
115			return -EFAULT;
116
117		err = bnep_get_conninfo(&ci);
118		if (!err && copy_to_user(argp, &ci, sizeof(ci)))
119			return -EFAULT;
120
121		return err;
122
123	case BNEPGETSUPPFEAT:
124		if (copy_to_user(argp, &supp_feat, sizeof(supp_feat)))
125			return -EFAULT;
126
127		return 0;
128
129	default:
130		return -EINVAL;
131	}
132
133	return 0;
134}
135
136static int bnep_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
137{
138	return do_bnep_sock_ioctl(sock, cmd, (void __user *)arg);
139}
140
141#ifdef CONFIG_COMPAT
142static int bnep_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
143{
144	void __user *argp = compat_ptr(arg);
145	if (cmd == BNEPGETCONNLIST) {
146		struct bnep_connlist_req cl;
147		unsigned __user *p = argp;
148		u32 uci;
149		int err;
150
151		if (get_user(cl.cnum, p) || get_user(uci, p + 1))
152			return -EFAULT;
153
154		cl.ci = compat_ptr(uci);
155
156		if (cl.cnum <= 0)
157			return -EINVAL;
158
159		err = bnep_get_connlist(&cl);
160
161		if (!err && put_user(cl.cnum, p))
162			err = -EFAULT;
163
164		return err;
165	}
166
167	return do_bnep_sock_ioctl(sock, cmd, argp);
168}
169#endif
170
171static const struct proto_ops bnep_sock_ops = {
172	.family		= PF_BLUETOOTH,
173	.owner		= THIS_MODULE,
174	.release	= bnep_sock_release,
175	.ioctl		= bnep_sock_ioctl,
176#ifdef CONFIG_COMPAT
177	.compat_ioctl	= bnep_sock_compat_ioctl,
178#endif
179	.bind		= sock_no_bind,
180	.getname	= sock_no_getname,
181	.sendmsg	= sock_no_sendmsg,
182	.recvmsg	= sock_no_recvmsg,
183	.listen		= sock_no_listen,
184	.shutdown	= sock_no_shutdown,
185	.setsockopt	= sock_no_setsockopt,
186	.getsockopt	= sock_no_getsockopt,
187	.connect	= sock_no_connect,
188	.socketpair	= sock_no_socketpair,
189	.accept		= sock_no_accept,
190	.mmap		= sock_no_mmap
191};
192
193static struct proto bnep_proto = {
194	.name		= "BNEP",
195	.owner		= THIS_MODULE,
196	.obj_size	= sizeof(struct bt_sock)
197};
198
199static int bnep_sock_create(struct net *net, struct socket *sock, int protocol,
200			    int kern)
201{
202	struct sock *sk;
203
204	BT_DBG("sock %p", sock);
205
206	if (sock->type != SOCK_RAW)
207		return -ESOCKTNOSUPPORT;
208
209	sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &bnep_proto, kern);
210	if (!sk)
211		return -ENOMEM;
212
213	sock_init_data(sock, sk);
214
215	sock->ops = &bnep_sock_ops;
216
217	sock->state = SS_UNCONNECTED;
218
219	sock_reset_flag(sk, SOCK_ZAPPED);
220
221	sk->sk_protocol = protocol;
222	sk->sk_state	= BT_OPEN;
223
224	bt_sock_link(&bnep_sk_list, sk);
225	return 0;
226}
227
228static const struct net_proto_family bnep_sock_family_ops = {
229	.family = PF_BLUETOOTH,
230	.owner	= THIS_MODULE,
231	.create = bnep_sock_create
232};
233
234int __init bnep_sock_init(void)
235{
236	int err;
237
238	err = proto_register(&bnep_proto, 0);
239	if (err < 0)
240		return err;
241
242	err = bt_sock_register(BTPROTO_BNEP, &bnep_sock_family_ops);
243	if (err < 0) {
244		BT_ERR("Can't register BNEP socket");
245		goto error;
246	}
247
248	err = bt_procfs_init(&init_net, "bnep", &bnep_sk_list, NULL);
249	if (err < 0) {
250		BT_ERR("Failed to create BNEP proc file");
251		bt_sock_unregister(BTPROTO_BNEP);
252		goto error;
253	}
254
255	BT_INFO("BNEP socket layer initialized");
256
257	return 0;
258
259error:
260	proto_unregister(&bnep_proto);
261	return err;
262}
263
264void __exit bnep_sock_cleanup(void)
265{
266	bt_procfs_cleanup(&init_net, "bnep");
267	bt_sock_unregister(BTPROTO_BNEP);
268	proto_unregister(&bnep_proto);
269}