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23#include <linux/export.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/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>
35#include <linux/compat.h>
36#include <linux/gfp.h>
37#include <linux/uaccess.h>
38#include <net/sock.h>
39
40#include <linux/isdn/capilli.h>
41
42
43#include "cmtp.h"
44
45static struct bt_sock_list cmtp_sk_list = {
46 .lock = __RW_LOCK_UNLOCKED(cmtp_sk_list.lock)
47};
48
49static 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
58 bt_sock_unlink(&cmtp_sk_list, sk);
59
60 sock_orphan(sk);
61 sock_put(sk);
62
63 return 0;
64}
65
66static int do_cmtp_sock_ioctl(struct socket *sock, unsigned int cmd, void __user *argp)
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;
73 int err;
74
75 BT_DBG("cmd %x arg %p", cmd, argp);
76
77 switch (cmd) {
78 case CMTPCONNADD:
79 if (!capable(CAP_NET_ADMIN))
80 return -EPERM;
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) {
90 sockfd_put(nsock);
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
99 sockfd_put(nsock);
100
101 return err;
102
103 case CMTPCONNDEL:
104 if (!capable(CAP_NET_ADMIN))
105 return -EPERM;
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
139static 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
144#ifdef CONFIG_COMPAT
145static int cmtp_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
146{
147 void __user *argp = compat_ptr(arg);
148 if (cmd == CMTPGETCONNLIST) {
149 struct cmtp_connlist_req cl;
150 u32 __user *p = argp;
151 u32 uci;
152 int err;
153
154 if (get_user(cl.cnum, p) || get_user(uci, p + 1))
155 return -EFAULT;
156
157 cl.ci = compat_ptr(uci);
158
159 if (cl.cnum <= 0)
160 return -EINVAL;
161
162 err = cmtp_get_connlist(&cl);
163
164 if (!err && put_user(cl.cnum, p))
165 err = -EFAULT;
166
167 return err;
168 }
169
170 return do_cmtp_sock_ioctl(sock, cmd, argp);
171}
172#endif
173
174static const struct proto_ops cmtp_sock_ops = {
175 .family = PF_BLUETOOTH,
176 .owner = THIS_MODULE,
177 .release = cmtp_sock_release,
178 .ioctl = cmtp_sock_ioctl,
179#ifdef CONFIG_COMPAT
180 .compat_ioctl = cmtp_sock_compat_ioctl,
181#endif
182 .bind = sock_no_bind,
183 .getname = sock_no_getname,
184 .sendmsg = sock_no_sendmsg,
185 .recvmsg = sock_no_recvmsg,
186 .listen = sock_no_listen,
187 .shutdown = sock_no_shutdown,
188 .connect = sock_no_connect,
189 .socketpair = sock_no_socketpair,
190 .accept = sock_no_accept,
191 .mmap = sock_no_mmap
192};
193
194static struct proto cmtp_proto = {
195 .name = "CMTP",
196 .owner = THIS_MODULE,
197 .obj_size = sizeof(struct bt_sock)
198};
199
200static int cmtp_sock_create(struct net *net, struct socket *sock, int protocol,
201 int kern)
202{
203 struct sock *sk;
204
205 BT_DBG("sock %p", sock);
206
207 if (sock->type != SOCK_RAW)
208 return -ESOCKTNOSUPPORT;
209
210 sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &cmtp_proto, kern);
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
225 bt_sock_link(&cmtp_sk_list, sk);
226
227 return 0;
228}
229
230static const struct net_proto_family cmtp_sock_family_ops = {
231 .family = PF_BLUETOOTH,
232 .owner = THIS_MODULE,
233 .create = cmtp_sock_create
234};
235
236int 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);
245 if (err < 0) {
246 BT_ERR("Can't register CMTP socket");
247 goto error;
248 }
249
250 err = bt_procfs_init(&init_net, "cmtp", &cmtp_sk_list, NULL);
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");
258
259 return 0;
260
261error:
262 proto_unregister(&cmtp_proto);
263 return err;
264}
265
266void cmtp_cleanup_sockets(void)
267{
268 bt_procfs_cleanup(&init_net, "cmtp");
269 bt_sock_unregister(BTPROTO_CMTP);
270 proto_unregister(&cmtp_proto);
271}
272
