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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> | |
29 | #include <linux/major.h> | |
30 | #include <linux/sched.h> | |
31 | #include <linux/slab.h> | |
32 | #include <linux/poll.h> | |
33 | #include <linux/fcntl.h> | |
34 | #include <linux/skbuff.h> | |
35 | #include <linux/socket.h> | |
36 | #include <linux/ioctl.h> | |
37 | #include <linux/file.h> | |
38 | #include <linux/init.h> | |
39 | #include <net/sock.h> | |
40 | ||
41 | #include "hidp.h" | |
42 | ||
43 | #ifndef CONFIG_BT_HIDP_DEBUG | |
44 | #undef BT_DBG | |
45 | #define BT_DBG(D...) | |
46 | #endif | |
47 | ||
48 | static int hidp_sock_release(struct socket *sock) | |
49 | { | |
50 | struct sock *sk = sock->sk; | |
51 | ||
52 | BT_DBG("sock %p sk %p", sock, sk); | |
53 | ||
54 | if (!sk) | |
55 | return 0; | |
56 | ||
57 | sock_orphan(sk); | |
58 | sock_put(sk); | |
59 | ||
60 | return 0; | |
61 | } | |
62 | ||
63 | static int hidp_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
64 | { | |
65 | void __user *argp = (void __user *) arg; | |
66 | struct hidp_connadd_req ca; | |
67 | struct hidp_conndel_req cd; | |
68 | struct hidp_connlist_req cl; | |
69 | struct hidp_conninfo ci; | |
70 | struct socket *csock; | |
71 | struct socket *isock; | |
72 | int err; | |
73 | ||
74 | BT_DBG("cmd %x arg %lx", cmd, arg); | |
75 | ||
76 | switch (cmd) { | |
77 | case HIDPCONNADD: | |
78 | if (!capable(CAP_NET_ADMIN)) | |
79 | return -EACCES; | |
80 | ||
81 | if (copy_from_user(&ca, argp, sizeof(ca))) | |
82 | return -EFAULT; | |
83 | ||
84 | csock = sockfd_lookup(ca.ctrl_sock, &err); | |
85 | if (!csock) | |
86 | return err; | |
87 | ||
88 | isock = sockfd_lookup(ca.intr_sock, &err); | |
89 | if (!isock) { | |
90 | fput(csock->file); | |
91 | return err; | |
92 | } | |
93 | ||
94 | if (csock->sk->sk_state != BT_CONNECTED || isock->sk->sk_state != BT_CONNECTED) { | |
95 | fput(csock->file); | |
96 | fput(isock->file); | |
97 | return -EBADFD; | |
98 | } | |
99 | ||
100 | err = hidp_add_connection(&ca, csock, isock); | |
101 | if (!err) { | |
102 | if (copy_to_user(argp, &ca, sizeof(ca))) | |
103 | err = -EFAULT; | |
104 | } else { | |
105 | fput(csock->file); | |
106 | fput(isock->file); | |
107 | } | |
108 | ||
109 | return err; | |
110 | ||
111 | case HIDPCONNDEL: | |
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 hidp_del_connection(&cd); | |
119 | ||
120 | case HIDPGETCONNLIST: | |
121 | if (copy_from_user(&cl, argp, sizeof(cl))) | |
122 | return -EFAULT; | |
123 | ||
124 | if (cl.cnum <= 0) | |
125 | return -EINVAL; | |
126 | ||
127 | err = hidp_get_connlist(&cl); | |
128 | if (!err && copy_to_user(argp, &cl, sizeof(cl))) | |
129 | return -EFAULT; | |
130 | ||
131 | return err; | |
132 | ||
133 | case HIDPGETCONNINFO: | |
134 | if (copy_from_user(&ci, argp, sizeof(ci))) | |
135 | return -EFAULT; | |
136 | ||
137 | err = hidp_get_conninfo(&ci); | |
138 | if (!err && copy_to_user(argp, &ci, sizeof(ci))) | |
139 | return -EFAULT; | |
140 | ||
141 | return err; | |
142 | } | |
143 | ||
144 | return -EINVAL; | |
145 | } | |
146 | ||
147 | static struct proto_ops hidp_sock_ops = { | |
148 | .family = PF_BLUETOOTH, | |
149 | .owner = THIS_MODULE, | |
150 | .release = hidp_sock_release, | |
151 | .ioctl = hidp_sock_ioctl, | |
152 | .bind = sock_no_bind, | |
153 | .getname = sock_no_getname, | |
154 | .sendmsg = sock_no_sendmsg, | |
155 | .recvmsg = sock_no_recvmsg, | |
156 | .poll = sock_no_poll, | |
157 | .listen = sock_no_listen, | |
158 | .shutdown = sock_no_shutdown, | |
159 | .setsockopt = sock_no_setsockopt, | |
160 | .getsockopt = sock_no_getsockopt, | |
161 | .connect = sock_no_connect, | |
162 | .socketpair = sock_no_socketpair, | |
163 | .accept = sock_no_accept, | |
164 | .mmap = sock_no_mmap | |
165 | }; | |
166 | ||
167 | static struct proto hidp_proto = { | |
168 | .name = "HIDP", | |
169 | .owner = THIS_MODULE, | |
170 | .obj_size = sizeof(struct bt_sock) | |
171 | }; | |
172 | ||
173 | static int hidp_sock_create(struct socket *sock, int protocol) | |
174 | { | |
175 | struct sock *sk; | |
176 | ||
177 | BT_DBG("sock %p", sock); | |
178 | ||
179 | if (sock->type != SOCK_RAW) | |
180 | return -ESOCKTNOSUPPORT; | |
181 | ||
182 | sk = sk_alloc(PF_BLUETOOTH, GFP_KERNEL, &hidp_proto, 1); | |
183 | if (!sk) | |
184 | return -ENOMEM; | |
185 | ||
186 | sock_init_data(sock, sk); | |
187 | ||
188 | sock->ops = &hidp_sock_ops; | |
189 | ||
190 | sock->state = SS_UNCONNECTED; | |
191 | ||
192 | sock_reset_flag(sk, SOCK_ZAPPED); | |
193 | ||
194 | sk->sk_protocol = protocol; | |
195 | sk->sk_state = BT_OPEN; | |
196 | ||
197 | return 0; | |
198 | } | |
199 | ||
200 | static struct net_proto_family hidp_sock_family_ops = { | |
201 | .family = PF_BLUETOOTH, | |
202 | .owner = THIS_MODULE, | |
203 | .create = hidp_sock_create | |
204 | }; | |
205 | ||
206 | int __init hidp_init_sockets(void) | |
207 | { | |
208 | int err; | |
209 | ||
210 | err = proto_register(&hidp_proto, 0); | |
211 | if (err < 0) | |
212 | return err; | |
213 | ||
214 | err = bt_sock_register(BTPROTO_HIDP, &hidp_sock_family_ops); | |
215 | if (err < 0) | |
216 | goto error; | |
217 | ||
218 | return 0; | |
219 | ||
220 | error: | |
221 | BT_ERR("Can't register HIDP socket"); | |
222 | proto_unregister(&hidp_proto); | |
223 | return err; | |
224 | } | |
225 | ||
226 | void __exit hidp_cleanup_sockets(void) | |
227 | { | |
228 | if (bt_sock_unregister(BTPROTO_HIDP) < 0) | |
229 | BT_ERR("Can't unregister HIDP socket"); | |
230 | ||
231 | proto_unregister(&hidp_proto); | |
232 | } |