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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 | ||
28 | #include "connector.h" | |
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 | ||
44 | static 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_groups = 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 | ||
115 | nlmsg_failure: | |
116 | printk(KERN_ERR "Failed to send %u.%u\n", msg->seq, msg->ack); | |
117 | kfree_skb(skb); | |
118 | return -EINVAL; | |
119 | } | |
120 | ||
121 | static u32 cn_test_timer_counter; | |
122 | static 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 | ||
150 | static 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 | ||
179 | static 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 | ||
189 | module_init(cn_test_init); | |
190 | module_exit(cn_test_fini); | |
191 | ||
192 | MODULE_LICENSE("GPL"); | |
193 | MODULE_AUTHOR("Evgeniy Polyakov <johnpol@2ka.mipt.ru>"); | |
194 | MODULE_DESCRIPTION("Connector's test module"); |