1 /*
2 CMTP implementation for Linux Bluetooth stack (BlueZ).
3 Copyright (C) 2002-2003 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/module.h>
24
25 #include <linux/types.h>
26 #include <linux/capability.h>
27 #include <linux/errno.h>
28 #include <linux/kernel.h>
29 #include <linux/slab.h>
30 #include <linux/poll.h>
31 #include <linux/fcntl.h>
32 #include <linux/skbuff.h>
33 #include <linux/socket.h>
34 #include <linux/ioctl.h>
35 #include <linux/file.h>
36 #include <linux/compat.h>
37 #include <net/sock.h>
38
39 #include <linux/isdn/capilli.h>
40
41 #include <asm/system.h>
42 #include <asm/uaccess.h>
43
44 #include "cmtp.h"
45
cmtp_sock_release(struct socket * sock)46 static int cmtp_sock_release(struct socket *sock)
47 {
48 struct sock *sk = sock->sk;
49
50 BT_DBG("sock %p sk %p", sock, sk);
51
52 if (!sk)
53 return 0;
54
55 sock_orphan(sk);
56 sock_put(sk);
57
58 return 0;
59 }
60
cmtp_sock_ioctl(struct socket * sock,unsigned int cmd,unsigned long arg)61 static int cmtp_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
62 {
63 struct cmtp_connadd_req ca;
64 struct cmtp_conndel_req cd;
65 struct cmtp_connlist_req cl;
66 struct cmtp_conninfo ci;
67 struct socket *nsock;
68 void __user *argp = (void __user *)arg;
69 int err;
70
71 BT_DBG("cmd %x arg %lx", cmd, arg);
72
73 switch (cmd) {
74 case CMTPCONNADD:
75 if (!capable(CAP_NET_ADMIN))
76 return -EACCES;
77
78 if (copy_from_user(&ca, argp, sizeof(ca)))
79 return -EFAULT;
80
81 nsock = sockfd_lookup(ca.sock, &err);
82 if (!nsock)
83 return err;
84
85 if (nsock->sk->sk_state != BT_CONNECTED) {
86 sockfd_put(nsock);
87 return -EBADFD;
88 }
89
90 err = cmtp_add_connection(&ca, nsock);
91 if (!err) {
92 if (copy_to_user(argp, &ca, sizeof(ca)))
93 err = -EFAULT;
94 } else
95 sockfd_put(nsock);
96
97 return err;
98
99 case CMTPCONNDEL:
100 if (!capable(CAP_NET_ADMIN))
101 return -EACCES;
102
103 if (copy_from_user(&cd, argp, sizeof(cd)))
104 return -EFAULT;
105
106 return cmtp_del_connection(&cd);
107
108 case CMTPGETCONNLIST:
109 if (copy_from_user(&cl, argp, sizeof(cl)))
110 return -EFAULT;
111
112 if (cl.cnum <= 0)
113 return -EINVAL;
114
115 err = cmtp_get_connlist(&cl);
116 if (!err && copy_to_user(argp, &cl, sizeof(cl)))
117 return -EFAULT;
118
119 return err;
120
121 case CMTPGETCONNINFO:
122 if (copy_from_user(&ci, argp, sizeof(ci)))
123 return -EFAULT;
124
125 err = cmtp_get_conninfo(&ci);
126 if (!err && copy_to_user(argp, &ci, sizeof(ci)))
127 return -EFAULT;
128
129 return err;
130 }
131
132 return -EINVAL;
133 }
134
135 #ifdef CONFIG_COMPAT
cmtp_sock_compat_ioctl(struct socket * sock,unsigned int cmd,unsigned long arg)136 static int cmtp_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
137 {
138 if (cmd == CMTPGETCONNLIST) {
139 struct cmtp_connlist_req cl;
140 uint32_t uci;
141 int err;
142
143 if (get_user(cl.cnum, (uint32_t __user *) arg) ||
144 get_user(uci, (u32 __user *) (arg + 4)))
145 return -EFAULT;
146
147 cl.ci = compat_ptr(uci);
148
149 if (cl.cnum <= 0)
150 return -EINVAL;
151
152 err = cmtp_get_connlist(&cl);
153
154 if (!err && put_user(cl.cnum, (uint32_t __user *) arg))
155 err = -EFAULT;
156
157 return err;
158 }
159
160 return cmtp_sock_ioctl(sock, cmd, arg);
161 }
162 #endif
163
164 static const struct proto_ops cmtp_sock_ops = {
165 .family = PF_BLUETOOTH,
166 .owner = THIS_MODULE,
167 .release = cmtp_sock_release,
168 .ioctl = cmtp_sock_ioctl,
169 #ifdef CONFIG_COMPAT
170 .compat_ioctl = cmtp_sock_compat_ioctl,
171 #endif
172 .bind = sock_no_bind,
173 .getname = sock_no_getname,
174 .sendmsg = sock_no_sendmsg,
175 .recvmsg = sock_no_recvmsg,
176 .poll = sock_no_poll,
177 .listen = sock_no_listen,
178 .shutdown = sock_no_shutdown,
179 .setsockopt = sock_no_setsockopt,
180 .getsockopt = sock_no_getsockopt,
181 .connect = sock_no_connect,
182 .socketpair = sock_no_socketpair,
183 .accept = sock_no_accept,
184 .mmap = sock_no_mmap
185 };
186
187 static struct proto cmtp_proto = {
188 .name = "CMTP",
189 .owner = THIS_MODULE,
190 .obj_size = sizeof(struct bt_sock)
191 };
192
cmtp_sock_create(struct net * net,struct socket * sock,int protocol)193 static int cmtp_sock_create(struct net *net, struct socket *sock, int protocol)
194 {
195 struct sock *sk;
196
197 BT_DBG("sock %p", sock);
198
199 if (sock->type != SOCK_RAW)
200 return -ESOCKTNOSUPPORT;
201
202 sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &cmtp_proto);
203 if (!sk)
204 return -ENOMEM;
205
206 sock_init_data(sock, sk);
207
208 sock->ops = &cmtp_sock_ops;
209
210 sock->state = SS_UNCONNECTED;
211
212 sock_reset_flag(sk, SOCK_ZAPPED);
213
214 sk->sk_protocol = protocol;
215 sk->sk_state = BT_OPEN;
216
217 return 0;
218 }
219
220 static struct net_proto_family cmtp_sock_family_ops = {
221 .family = PF_BLUETOOTH,
222 .owner = THIS_MODULE,
223 .create = cmtp_sock_create
224 };
225
cmtp_init_sockets(void)226 int cmtp_init_sockets(void)
227 {
228 int err;
229
230 err = proto_register(&cmtp_proto, 0);
231 if (err < 0)
232 return err;
233
234 err = bt_sock_register(BTPROTO_CMTP, &cmtp_sock_family_ops);
235 if (err < 0)
236 goto error;
237
238 return 0;
239
240 error:
241 BT_ERR("Can't register CMTP socket");
242 proto_unregister(&cmtp_proto);
243 return err;
244 }
245
cmtp_cleanup_sockets(void)246 void cmtp_cleanup_sockets(void)
247 {
248 if (bt_sock_unregister(BTPROTO_CMTP) < 0)
249 BT_ERR("Can't unregister CMTP socket");
250
251 proto_unregister(&cmtp_proto);
252 }
253