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7672d0b5 EP |
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 | ||
18a0c236 | 28 | #include <linux/connector.h> |
7672d0b5 EP |
29 | |
30 | static struct cb_id cn_test_id = { 0x123, 0x456 }; | |
31 | static char cn_test_name[] = "cn_test"; | |
32 | static struct sock *nls; | |
33 | static struct timer_list cn_test_timer; | |
34 | ||
35 | void 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 | ||
28f06c6f JSR |
44 | /* |
45 | * Do not remove this function even if no one is using it as | |
46 | * this is an example of how to get notifications about new | |
47 | * connector user registration | |
48 | */ | |
49 | #if 0 | |
7672d0b5 EP |
50 | static int cn_test_want_notify(void) |
51 | { | |
52 | struct cn_ctl_msg *ctl; | |
53 | struct cn_notify_req *req; | |
54 | struct cn_msg *msg = NULL; | |
55 | int size, size0; | |
56 | struct sk_buff *skb; | |
57 | struct nlmsghdr *nlh; | |
58 | u32 group = 1; | |
59 | ||
60 | size0 = sizeof(*msg) + sizeof(*ctl) + 3 * sizeof(*req); | |
61 | ||
62 | size = NLMSG_SPACE(size0); | |
63 | ||
64 | skb = alloc_skb(size, GFP_ATOMIC); | |
65 | if (!skb) { | |
66 | printk(KERN_ERR "Failed to allocate new skb with size=%u.\n", | |
67 | size); | |
68 | ||
69 | return -ENOMEM; | |
70 | } | |
71 | ||
72 | nlh = NLMSG_PUT(skb, 0, 0x123, NLMSG_DONE, size - sizeof(*nlh)); | |
73 | ||
74 | msg = (struct cn_msg *)NLMSG_DATA(nlh); | |
75 | ||
76 | memset(msg, 0, size0); | |
77 | ||
78 | msg->id.idx = -1; | |
79 | msg->id.val = -1; | |
80 | msg->seq = 0x123; | |
81 | msg->ack = 0x345; | |
82 | msg->len = size0 - sizeof(*msg); | |
83 | ||
84 | ctl = (struct cn_ctl_msg *)(msg + 1); | |
85 | ||
86 | ctl->idx_notify_num = 1; | |
87 | ctl->val_notify_num = 2; | |
88 | ctl->group = group; | |
89 | ctl->len = msg->len - sizeof(*ctl); | |
90 | ||
91 | req = (struct cn_notify_req *)(ctl + 1); | |
92 | ||
93 | /* | |
94 | * Idx. | |
95 | */ | |
96 | req->first = cn_test_id.idx; | |
97 | req->range = 10; | |
98 | ||
99 | /* | |
100 | * Val 0. | |
101 | */ | |
102 | req++; | |
103 | req->first = cn_test_id.val; | |
104 | req->range = 10; | |
105 | ||
106 | /* | |
107 | * Val 1. | |
108 | */ | |
109 | req++; | |
110 | req->first = cn_test_id.val + 20; | |
111 | req->range = 10; | |
112 | ||
18a0c236 | 113 | NETLINK_CB(skb).dst_group = ctl->group; |
7672d0b5 EP |
114 | //netlink_broadcast(nls, skb, 0, ctl->group, GFP_ATOMIC); |
115 | netlink_unicast(nls, skb, 0, 0); | |
116 | ||
117 | printk(KERN_INFO "Request was sent. Group=0x%x.\n", ctl->group); | |
118 | ||
119 | return 0; | |
120 | ||
121 | nlmsg_failure: | |
122 | printk(KERN_ERR "Failed to send %u.%u\n", msg->seq, msg->ack); | |
123 | kfree_skb(skb); | |
124 | return -EINVAL; | |
125 | } | |
28f06c6f | 126 | #endif |
7672d0b5 EP |
127 | |
128 | static u32 cn_test_timer_counter; | |
129 | static void cn_test_timer_func(unsigned long __data) | |
130 | { | |
131 | struct cn_msg *m; | |
132 | char data[32]; | |
133 | ||
dd00cc48 | 134 | m = kzalloc(sizeof(*m) + sizeof(data), GFP_ATOMIC); |
7672d0b5 | 135 | if (m) { |
7672d0b5 EP |
136 | |
137 | memcpy(&m->id, &cn_test_id, sizeof(m->id)); | |
138 | m->seq = cn_test_timer_counter; | |
139 | m->len = sizeof(data); | |
140 | ||
141 | m->len = | |
142 | scnprintf(data, sizeof(data), "counter = %u", | |
143 | cn_test_timer_counter) + 1; | |
144 | ||
145 | memcpy(m + 1, data, m->len); | |
146 | ||
f82da723 | 147 | cn_netlink_send(m, 0, GFP_ATOMIC); |
7672d0b5 EP |
148 | kfree(m); |
149 | } | |
150 | ||
151 | cn_test_timer_counter++; | |
152 | ||
153 | mod_timer(&cn_test_timer, jiffies + HZ); | |
154 | } | |
155 | ||
156 | static int cn_test_init(void) | |
157 | { | |
158 | int err; | |
159 | ||
160 | err = cn_add_callback(&cn_test_id, cn_test_name, cn_test_callback); | |
161 | if (err) | |
162 | goto err_out; | |
163 | cn_test_id.val++; | |
164 | err = cn_add_callback(&cn_test_id, cn_test_name, cn_test_callback); | |
165 | if (err) { | |
166 | cn_del_callback(&cn_test_id); | |
167 | goto err_out; | |
168 | } | |
169 | ||
f82da723 | 170 | setup_timer(&cn_test_timer, cn_test_timer_func, 0); |
7672d0b5 | 171 | cn_test_timer.expires = jiffies + HZ; |
7672d0b5 EP |
172 | add_timer(&cn_test_timer); |
173 | ||
174 | return 0; | |
175 | ||
176 | err_out: | |
177 | if (nls && nls->sk_socket) | |
178 | sock_release(nls->sk_socket); | |
179 | ||
180 | return err; | |
181 | } | |
182 | ||
183 | static void cn_test_fini(void) | |
184 | { | |
185 | del_timer_sync(&cn_test_timer); | |
186 | cn_del_callback(&cn_test_id); | |
187 | cn_test_id.val--; | |
188 | cn_del_callback(&cn_test_id); | |
189 | if (nls && nls->sk_socket) | |
190 | sock_release(nls->sk_socket); | |
191 | } | |
192 | ||
193 | module_init(cn_test_init); | |
194 | module_exit(cn_test_fini); | |
195 | ||
196 | MODULE_LICENSE("GPL"); | |
197 | MODULE_AUTHOR("Evgeniy Polyakov <johnpol@2ka.mipt.ru>"); | |
198 | MODULE_DESCRIPTION("Connector's test module"); |