1/*
2 * 	cn_test.c
3 *
4 * 2004-2005 Copyright (c) Evgeniy Polyakov <johnpol@2ka.mipt.ru>
5 * All rights reserved.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
20 */
21
22#include <linux/kernel.h>
23#include <linux/module.h>
24#include <linux/moduleparam.h>
25#include <linux/skbuff.h>
26#include <linux/timer.h>
27
28#include <linux/connector.h>
29
30static struct cb_id cn_test_id = { 0x123, 0x456 };
31static char cn_test_name[] = "cn_test";
32static struct sock *nls;
33static struct timer_list cn_test_timer;
34
35void cn_test_callback(void *data)
36{
37	struct cn_msg *msg = (struct cn_msg *)data;
38
39	printk("%s: %lu: idx=%x, val=%x, seq=%u, ack=%u, len=%d: %s.\n",
40	       __func__, jiffies, msg->id.idx, msg->id.val,
41	       msg->seq, msg->ack, msg->len, (char *)msg->data);
42}
43
44static int cn_test_want_notify(void)
45{
46	struct cn_ctl_msg *ctl;
47	struct cn_notify_req *req;
48	struct cn_msg *msg = NULL;
49	int size, size0;
50	struct sk_buff *skb;
51	struct nlmsghdr *nlh;
52	u32 group = 1;
53
54	size0 = sizeof(*msg) + sizeof(*ctl) + 3 * sizeof(*req);
55
56	size = NLMSG_SPACE(size0);
57
58	skb = alloc_skb(size, GFP_ATOMIC);
59	if (!skb) {
60		printk(KERN_ERR "Failed to allocate new skb with size=%u.\n",
61		       size);
62
63		return -ENOMEM;
64	}
65
66	nlh = NLMSG_PUT(skb, 0, 0x123, NLMSG_DONE, size - sizeof(*nlh));
67
68	msg = (struct cn_msg *)NLMSG_DATA(nlh);
69
70	memset(msg, 0, size0);
71
72	msg->id.idx = -1;
73	msg->id.val = -1;
74	msg->seq = 0x123;
75	msg->ack = 0x345;
76	msg->len = size0 - sizeof(*msg);
77
78	ctl = (struct cn_ctl_msg *)(msg + 1);
79
80	ctl->idx_notify_num = 1;
81	ctl->val_notify_num = 2;
82	ctl->group = group;
83	ctl->len = msg->len - sizeof(*ctl);
84
85	req = (struct cn_notify_req *)(ctl + 1);
86
87	/*
88	 * Idx.
89	 */
90	req->first = cn_test_id.idx;
91	req->range = 10;
92
93	/*
94	 * Val 0.
95	 */
96	req++;
97	req->first = cn_test_id.val;
98	req->range = 10;
99
100	/*
101	 * Val 1.
102	 */
103	req++;
104	req->first = cn_test_id.val + 20;
105	req->range = 10;
106
107	NETLINK_CB(skb).dst_group = ctl->group;
108	//netlink_broadcast(nls, skb, 0, ctl->group, GFP_ATOMIC);
109	netlink_unicast(nls, skb, 0, 0);
110
111	printk(KERN_INFO "Request was sent. Group=0x%x.\n", ctl->group);
112
113	return 0;
114
115nlmsg_failure:
116	printk(KERN_ERR "Failed to send %u.%u\n", msg->seq, msg->ack);
117	kfree_skb(skb);
118	return -EINVAL;
119}
120
121static u32 cn_test_timer_counter;
122static void cn_test_timer_func(unsigned long __data)
123{
124	struct cn_msg *m;
125	char data[32];
126
127	m = kmalloc(sizeof(*m) + sizeof(data), GFP_ATOMIC);
128	if (m) {
129		memset(m, 0, sizeof(*m) + sizeof(data));
130
131		memcpy(&m->id, &cn_test_id, sizeof(m->id));
132		m->seq = cn_test_timer_counter;
133		m->len = sizeof(data);
134
135		m->len =
136		    scnprintf(data, sizeof(data), "counter = %u",
137			      cn_test_timer_counter) + 1;
138
139		memcpy(m + 1, data, m->len);
140
141		cn_netlink_send(m, 0, gfp_any());
142		kfree(m);
143	}
144
145	cn_test_timer_counter++;
146
147	mod_timer(&cn_test_timer, jiffies + HZ);
148}
149
150static int cn_test_init(void)
151{
152	int err;
153
154	err = cn_add_callback(&cn_test_id, cn_test_name, cn_test_callback);
155	if (err)
156		goto err_out;
157	cn_test_id.val++;
158	err = cn_add_callback(&cn_test_id, cn_test_name, cn_test_callback);
159	if (err) {
160		cn_del_callback(&cn_test_id);
161		goto err_out;
162	}
163
164	init_timer(&cn_test_timer);
165	cn_test_timer.function = cn_test_timer_func;
166	cn_test_timer.expires = jiffies + HZ;
167	cn_test_timer.data = 0;
168	add_timer(&cn_test_timer);
169
170	return 0;
171
172      err_out:
173	if (nls && nls->sk_socket)
174		sock_release(nls->sk_socket);
175
176	return err;
177}
178
179static void cn_test_fini(void)
180{
181	del_timer_sync(&cn_test_timer);
182	cn_del_callback(&cn_test_id);
183	cn_test_id.val--;
184	cn_del_callback(&cn_test_id);
185	if (nls && nls->sk_socket)
186		sock_release(nls->sk_socket);
187}
188
189module_init(cn_test_init);
190module_exit(cn_test_fini);
191
192MODULE_LICENSE("GPL");
193MODULE_AUTHOR("Evgeniy Polyakov <johnpol@2ka.mipt.ru>");
194MODULE_DESCRIPTION("Connector's test module");
195