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Commit | Line | Data |
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8e87d142 | 1 | /* |
1da177e4 LT |
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 | |
8e87d142 YH |
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 | |
1da177e4 LT |
16 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
17 | ||
8e87d142 YH |
18 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
19 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
1da177e4 LT |
20 | SOFTWARE IS DISCLAIMED. |
21 | */ | |
22 | ||
2ad8f54b | 23 | #include <linux/export.h> |
1da177e4 LT |
24 | |
25 | #include <linux/types.h> | |
4fc268d2 | 26 | #include <linux/capability.h> |
1da177e4 LT |
27 | #include <linux/errno.h> |
28 | #include <linux/kernel.h> | |
1da177e4 LT |
29 | #include <linux/poll.h> |
30 | #include <linux/fcntl.h> | |
31 | #include <linux/skbuff.h> | |
32 | #include <linux/socket.h> | |
33 | #include <linux/ioctl.h> | |
34 | #include <linux/file.h> | |
e9c5702e | 35 | #include <linux/compat.h> |
5a0e3ad6 | 36 | #include <linux/gfp.h> |
ffd13320 | 37 | #include <linux/uaccess.h> |
1da177e4 LT |
38 | #include <net/sock.h> |
39 | ||
40 | #include <linux/isdn/capilli.h> | |
41 | ||
1da177e4 LT |
42 | |
43 | #include "cmtp.h" | |
44 | ||
8c8de589 MY |
45 | static struct bt_sock_list cmtp_sk_list = { |
46 | .lock = __RW_LOCK_UNLOCKED(cmtp_sk_list.lock) | |
47 | }; | |
48 | ||
1da177e4 LT |
49 | static int cmtp_sock_release(struct socket *sock) |
50 | { | |
51 | struct sock *sk = sock->sk; | |
52 | ||
53 | BT_DBG("sock %p sk %p", sock, sk); | |
54 | ||
55 | if (!sk) | |
56 | return 0; | |
57 | ||
8c8de589 MY |
58 | bt_sock_unlink(&cmtp_sk_list, sk); |
59 | ||
1da177e4 LT |
60 | sock_orphan(sk); |
61 | sock_put(sk); | |
62 | ||
63 | return 0; | |
64 | } | |
65 | ||
89c0c24b | 66 | static int do_cmtp_sock_ioctl(struct socket *sock, unsigned int cmd, void __user *argp) |
1da177e4 LT |
67 | { |
68 | struct cmtp_connadd_req ca; | |
69 | struct cmtp_conndel_req cd; | |
70 | struct cmtp_connlist_req cl; | |
71 | struct cmtp_conninfo ci; | |
72 | struct socket *nsock; | |
1da177e4 LT |
73 | int err; |
74 | ||
89c0c24b | 75 | BT_DBG("cmd %x arg %p", cmd, argp); |
1da177e4 LT |
76 | |
77 | switch (cmd) { | |
78 | case CMTPCONNADD: | |
79 | if (!capable(CAP_NET_ADMIN)) | |
bf5b30b8 | 80 | return -EPERM; |
1da177e4 LT |
81 | |
82 | if (copy_from_user(&ca, argp, sizeof(ca))) | |
83 | return -EFAULT; | |
84 | ||
85 | nsock = sockfd_lookup(ca.sock, &err); | |
86 | if (!nsock) | |
87 | return err; | |
88 | ||
89 | if (nsock->sk->sk_state != BT_CONNECTED) { | |
67b23219 | 90 | sockfd_put(nsock); |
1da177e4 LT |
91 | return -EBADFD; |
92 | } | |
93 | ||
94 | err = cmtp_add_connection(&ca, nsock); | |
95 | if (!err) { | |
96 | if (copy_to_user(argp, &ca, sizeof(ca))) | |
97 | err = -EFAULT; | |
98 | } else | |
67b23219 | 99 | sockfd_put(nsock); |
1da177e4 LT |
100 | |
101 | return err; | |
102 | ||
103 | case CMTPCONNDEL: | |
104 | if (!capable(CAP_NET_ADMIN)) | |
bf5b30b8 | 105 | return -EPERM; |
1da177e4 LT |
106 | |
107 | if (copy_from_user(&cd, argp, sizeof(cd))) | |
108 | return -EFAULT; | |
109 | ||
110 | return cmtp_del_connection(&cd); | |
111 | ||
112 | case CMTPGETCONNLIST: | |
113 | if (copy_from_user(&cl, argp, sizeof(cl))) | |
114 | return -EFAULT; | |
115 | ||
116 | if (cl.cnum <= 0) | |
117 | return -EINVAL; | |
118 | ||
119 | err = cmtp_get_connlist(&cl); | |
120 | if (!err && copy_to_user(argp, &cl, sizeof(cl))) | |
121 | return -EFAULT; | |
122 | ||
123 | return err; | |
124 | ||
125 | case CMTPGETCONNINFO: | |
126 | if (copy_from_user(&ci, argp, sizeof(ci))) | |
127 | return -EFAULT; | |
128 | ||
129 | err = cmtp_get_conninfo(&ci); | |
130 | if (!err && copy_to_user(argp, &ci, sizeof(ci))) | |
131 | return -EFAULT; | |
132 | ||
133 | return err; | |
134 | } | |
135 | ||
136 | return -EINVAL; | |
137 | } | |
138 | ||
89c0c24b AV |
139 | static int cmtp_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
140 | { | |
141 | return do_cmtp_sock_ioctl(sock, cmd, (void __user *)arg); | |
142 | } | |
143 | ||
e9c5702e MH |
144 | #ifdef CONFIG_COMPAT |
145 | static int cmtp_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
146 | { | |
89c0c24b | 147 | void __user *argp = compat_ptr(arg); |
e9c5702e MH |
148 | if (cmd == CMTPGETCONNLIST) { |
149 | struct cmtp_connlist_req cl; | |
89c0c24b | 150 | u32 __user *p = argp; |
816a11d5 | 151 | u32 uci; |
e9c5702e MH |
152 | int err; |
153 | ||
89c0c24b | 154 | if (get_user(cl.cnum, p) || get_user(uci, p + 1)) |
e9c5702e MH |
155 | return -EFAULT; |
156 | ||
157 | cl.ci = compat_ptr(uci); | |
158 | ||
159 | if (cl.cnum <= 0) | |
160 | return -EINVAL; | |
8e87d142 | 161 | |
e9c5702e MH |
162 | err = cmtp_get_connlist(&cl); |
163 | ||
89c0c24b | 164 | if (!err && put_user(cl.cnum, p)) |
e9c5702e MH |
165 | err = -EFAULT; |
166 | ||
167 | return err; | |
168 | } | |
169 | ||
89c0c24b | 170 | return do_cmtp_sock_ioctl(sock, cmd, argp); |
e9c5702e MH |
171 | } |
172 | #endif | |
173 | ||
90ddc4f0 | 174 | static const struct proto_ops cmtp_sock_ops = { |
1da177e4 LT |
175 | .family = PF_BLUETOOTH, |
176 | .owner = THIS_MODULE, | |
177 | .release = cmtp_sock_release, | |
178 | .ioctl = cmtp_sock_ioctl, | |
e9c5702e MH |
179 | #ifdef CONFIG_COMPAT |
180 | .compat_ioctl = cmtp_sock_compat_ioctl, | |
181 | #endif | |
1da177e4 LT |
182 | .bind = sock_no_bind, |
183 | .getname = sock_no_getname, | |
184 | .sendmsg = sock_no_sendmsg, | |
185 | .recvmsg = sock_no_recvmsg, | |
1da177e4 LT |
186 | .listen = sock_no_listen, |
187 | .shutdown = sock_no_shutdown, | |
1da177e4 LT |
188 | .connect = sock_no_connect, |
189 | .socketpair = sock_no_socketpair, | |
190 | .accept = sock_no_accept, | |
191 | .mmap = sock_no_mmap | |
192 | }; | |
193 | ||
194 | static struct proto cmtp_proto = { | |
195 | .name = "CMTP", | |
196 | .owner = THIS_MODULE, | |
197 | .obj_size = sizeof(struct bt_sock) | |
198 | }; | |
199 | ||
3f378b68 EP |
200 | static int cmtp_sock_create(struct net *net, struct socket *sock, int protocol, |
201 | int kern) | |
1da177e4 LT |
202 | { |
203 | struct sock *sk; | |
204 | ||
205 | BT_DBG("sock %p", sock); | |
206 | ||
207 | if (sock->type != SOCK_RAW) | |
208 | return -ESOCKTNOSUPPORT; | |
209 | ||
11aa9c28 | 210 | sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &cmtp_proto, kern); |
1da177e4 LT |
211 | if (!sk) |
212 | return -ENOMEM; | |
213 | ||
214 | sock_init_data(sock, sk); | |
215 | ||
216 | sock->ops = &cmtp_sock_ops; | |
217 | ||
218 | sock->state = SS_UNCONNECTED; | |
219 | ||
220 | sock_reset_flag(sk, SOCK_ZAPPED); | |
221 | ||
222 | sk->sk_protocol = protocol; | |
223 | sk->sk_state = BT_OPEN; | |
224 | ||
8c8de589 MY |
225 | bt_sock_link(&cmtp_sk_list, sk); |
226 | ||
1da177e4 LT |
227 | return 0; |
228 | } | |
229 | ||
ec1b4cf7 | 230 | static const struct net_proto_family cmtp_sock_family_ops = { |
1da177e4 LT |
231 | .family = PF_BLUETOOTH, |
232 | .owner = THIS_MODULE, | |
233 | .create = cmtp_sock_create | |
234 | }; | |
235 | ||
236 | int cmtp_init_sockets(void) | |
237 | { | |
238 | int err; | |
239 | ||
240 | err = proto_register(&cmtp_proto, 0); | |
241 | if (err < 0) | |
242 | return err; | |
243 | ||
244 | err = bt_sock_register(BTPROTO_CMTP, &cmtp_sock_family_ops); | |
8c8de589 MY |
245 | if (err < 0) { |
246 | BT_ERR("Can't register CMTP socket"); | |
1da177e4 | 247 | goto error; |
8c8de589 MY |
248 | } |
249 | ||
b0316615 | 250 | err = bt_procfs_init(&init_net, "cmtp", &cmtp_sk_list, NULL); |
8c8de589 MY |
251 | if (err < 0) { |
252 | BT_ERR("Failed to create CMTP proc file"); | |
253 | bt_sock_unregister(BTPROTO_HIDP); | |
254 | goto error; | |
255 | } | |
256 | ||
257 | BT_INFO("CMTP socket layer initialized"); | |
1da177e4 LT |
258 | |
259 | return 0; | |
260 | ||
261 | error: | |
1da177e4 LT |
262 | proto_unregister(&cmtp_proto); |
263 | return err; | |
264 | } | |
265 | ||
266 | void cmtp_cleanup_sockets(void) | |
267 | { | |
8c8de589 | 268 | bt_procfs_cleanup(&init_net, "cmtp"); |
5e9d7f86 | 269 | bt_sock_unregister(BTPROTO_CMTP); |
1da177e4 LT |
270 | proto_unregister(&cmtp_proto); |
271 | } |