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1da177e4 LT |
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/config.h> | |
24 | #include <linux/module.h> | |
25 | ||
26 | #include <linux/types.h> | |
27 | #include <linux/errno.h> | |
28 | #include <linux/kernel.h> | |
1da177e4 LT |
29 | #include <linux/sched.h> |
30 | #include <linux/slab.h> | |
31 | #include <linux/poll.h> | |
32 | #include <linux/fcntl.h> | |
33 | #include <linux/skbuff.h> | |
34 | #include <linux/socket.h> | |
35 | #include <linux/ioctl.h> | |
36 | #include <linux/file.h> | |
37 | #include <linux/init.h> | |
38 | #include <net/sock.h> | |
39 | ||
40 | #include "hidp.h" | |
41 | ||
42 | #ifndef CONFIG_BT_HIDP_DEBUG | |
43 | #undef BT_DBG | |
44 | #define BT_DBG(D...) | |
45 | #endif | |
46 | ||
47 | static int hidp_sock_release(struct socket *sock) | |
48 | { | |
49 | struct sock *sk = sock->sk; | |
50 | ||
51 | BT_DBG("sock %p sk %p", sock, sk); | |
52 | ||
53 | if (!sk) | |
54 | return 0; | |
55 | ||
56 | sock_orphan(sk); | |
57 | sock_put(sk); | |
58 | ||
59 | return 0; | |
60 | } | |
61 | ||
62 | static int hidp_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
63 | { | |
64 | void __user *argp = (void __user *) arg; | |
65 | struct hidp_connadd_req ca; | |
66 | struct hidp_conndel_req cd; | |
67 | struct hidp_connlist_req cl; | |
68 | struct hidp_conninfo ci; | |
69 | struct socket *csock; | |
70 | struct socket *isock; | |
71 | int err; | |
72 | ||
73 | BT_DBG("cmd %x arg %lx", cmd, arg); | |
74 | ||
75 | switch (cmd) { | |
76 | case HIDPCONNADD: | |
77 | if (!capable(CAP_NET_ADMIN)) | |
78 | return -EACCES; | |
79 | ||
80 | if (copy_from_user(&ca, argp, sizeof(ca))) | |
81 | return -EFAULT; | |
82 | ||
83 | csock = sockfd_lookup(ca.ctrl_sock, &err); | |
84 | if (!csock) | |
85 | return err; | |
86 | ||
87 | isock = sockfd_lookup(ca.intr_sock, &err); | |
88 | if (!isock) { | |
89 | fput(csock->file); | |
90 | return err; | |
91 | } | |
92 | ||
93 | if (csock->sk->sk_state != BT_CONNECTED || isock->sk->sk_state != BT_CONNECTED) { | |
94 | fput(csock->file); | |
95 | fput(isock->file); | |
96 | return -EBADFD; | |
97 | } | |
98 | ||
99 | err = hidp_add_connection(&ca, csock, isock); | |
100 | if (!err) { | |
101 | if (copy_to_user(argp, &ca, sizeof(ca))) | |
102 | err = -EFAULT; | |
103 | } else { | |
104 | fput(csock->file); | |
105 | fput(isock->file); | |
106 | } | |
107 | ||
108 | return err; | |
109 | ||
110 | case HIDPCONNDEL: | |
111 | if (!capable(CAP_NET_ADMIN)) | |
112 | return -EACCES; | |
113 | ||
114 | if (copy_from_user(&cd, argp, sizeof(cd))) | |
115 | return -EFAULT; | |
116 | ||
117 | return hidp_del_connection(&cd); | |
118 | ||
119 | case HIDPGETCONNLIST: | |
120 | if (copy_from_user(&cl, argp, sizeof(cl))) | |
121 | return -EFAULT; | |
122 | ||
123 | if (cl.cnum <= 0) | |
124 | return -EINVAL; | |
125 | ||
126 | err = hidp_get_connlist(&cl); | |
127 | if (!err && copy_to_user(argp, &cl, sizeof(cl))) | |
128 | return -EFAULT; | |
129 | ||
130 | return err; | |
131 | ||
132 | case HIDPGETCONNINFO: | |
133 | if (copy_from_user(&ci, argp, sizeof(ci))) | |
134 | return -EFAULT; | |
135 | ||
136 | err = hidp_get_conninfo(&ci); | |
137 | if (!err && copy_to_user(argp, &ci, sizeof(ci))) | |
138 | return -EFAULT; | |
139 | ||
140 | return err; | |
141 | } | |
142 | ||
143 | return -EINVAL; | |
144 | } | |
145 | ||
90ddc4f0 | 146 | static const struct proto_ops hidp_sock_ops = { |
1da177e4 LT |
147 | .family = PF_BLUETOOTH, |
148 | .owner = THIS_MODULE, | |
149 | .release = hidp_sock_release, | |
150 | .ioctl = hidp_sock_ioctl, | |
151 | .bind = sock_no_bind, | |
152 | .getname = sock_no_getname, | |
153 | .sendmsg = sock_no_sendmsg, | |
154 | .recvmsg = sock_no_recvmsg, | |
155 | .poll = sock_no_poll, | |
156 | .listen = sock_no_listen, | |
157 | .shutdown = sock_no_shutdown, | |
158 | .setsockopt = sock_no_setsockopt, | |
159 | .getsockopt = sock_no_getsockopt, | |
160 | .connect = sock_no_connect, | |
161 | .socketpair = sock_no_socketpair, | |
162 | .accept = sock_no_accept, | |
163 | .mmap = sock_no_mmap | |
164 | }; | |
165 | ||
166 | static struct proto hidp_proto = { | |
167 | .name = "HIDP", | |
168 | .owner = THIS_MODULE, | |
169 | .obj_size = sizeof(struct bt_sock) | |
170 | }; | |
171 | ||
172 | static int hidp_sock_create(struct socket *sock, int protocol) | |
173 | { | |
174 | struct sock *sk; | |
175 | ||
176 | BT_DBG("sock %p", sock); | |
177 | ||
178 | if (sock->type != SOCK_RAW) | |
179 | return -ESOCKTNOSUPPORT; | |
180 | ||
181 | sk = sk_alloc(PF_BLUETOOTH, GFP_KERNEL, &hidp_proto, 1); | |
182 | if (!sk) | |
183 | return -ENOMEM; | |
184 | ||
185 | sock_init_data(sock, sk); | |
186 | ||
187 | sock->ops = &hidp_sock_ops; | |
188 | ||
189 | sock->state = SS_UNCONNECTED; | |
190 | ||
191 | sock_reset_flag(sk, SOCK_ZAPPED); | |
192 | ||
193 | sk->sk_protocol = protocol; | |
194 | sk->sk_state = BT_OPEN; | |
195 | ||
196 | return 0; | |
197 | } | |
198 | ||
199 | static struct net_proto_family hidp_sock_family_ops = { | |
200 | .family = PF_BLUETOOTH, | |
201 | .owner = THIS_MODULE, | |
202 | .create = hidp_sock_create | |
203 | }; | |
204 | ||
205 | int __init hidp_init_sockets(void) | |
206 | { | |
207 | int err; | |
208 | ||
209 | err = proto_register(&hidp_proto, 0); | |
210 | if (err < 0) | |
211 | return err; | |
212 | ||
213 | err = bt_sock_register(BTPROTO_HIDP, &hidp_sock_family_ops); | |
214 | if (err < 0) | |
215 | goto error; | |
216 | ||
217 | return 0; | |
218 | ||
219 | error: | |
220 | BT_ERR("Can't register HIDP socket"); | |
221 | proto_unregister(&hidp_proto); | |
222 | return err; | |
223 | } | |
224 | ||
225 | void __exit hidp_cleanup_sockets(void) | |
226 | { | |
227 | if (bt_sock_unregister(BTPROTO_HIDP) < 0) | |
228 | BT_ERR("Can't unregister HIDP socket"); | |
229 | ||
230 | proto_unregister(&hidp_proto); | |
231 | } |