/* * cn_test.c * * 2004-2005 Copyright (c) Evgeniy Polyakov <johnpol@2ka.mipt.ru> * All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/skbuff.h> #include <linux/timer.h> #include <linux/connector.h> static struct cb_id cn_test_id = { 0x123, 0x456 }; static char cn_test_name[] = "cn_test"; static struct sock *nls; static struct timer_list cn_test_timer; void cn_test_callback(void *data) { struct cn_msg *msg = (struct cn_msg *)data; printk("%s: %lu: idx=%x, val=%x, seq=%u, ack=%u, len=%d: %s.\n", __func__, jiffies, msg->id.idx, msg->id.val, msg->seq, msg->ack, msg->len, (char *)msg->data); } static int cn_test_want_notify(void) { struct cn_ctl_msg *ctl; struct cn_notify_req *req; struct cn_msg *msg = NULL; int size, size0; struct sk_buff *skb; struct nlmsghdr *nlh; u32 group = 1; size0 = sizeof(*msg) + sizeof(*ctl) + 3 * sizeof(*req); size = NLMSG_SPACE(size0); skb = alloc_skb(size, GFP_ATOMIC); if (!skb) { printk(KERN_ERR "Failed to allocate new skb with size=%u.\n", size); return -ENOMEM; } nlh = NLMSG_PUT(skb, 0, 0x123, NLMSG_DONE, size - sizeof(*nlh)); msg = (struct cn_msg *)NLMSG_DATA(nlh); memset(msg, 0, size0); msg->id.idx = -1; msg->id.val = -1; msg->seq = 0x123; msg->ack = 0x345; msg->len = size0 - sizeof(*msg); ctl = (struct cn_ctl_msg *)(msg + 1); ctl->idx_notify_num = 1; ctl->val_notify_num = 2; ctl->group = group; ctl->len = msg->len - sizeof(*ctl); req = (struct cn_notify_req *)(ctl + 1); /* * Idx. */ req->first = cn_test_id.idx; req->range = 10; /* * Val 0. */ req++; req->first = cn_test_id.val; req->range = 10; /* * Val 1. */ req++; req->first = cn_test_id.val + 20; req->range = 10; NETLINK_CB(skb).dst_group = ctl->group; //netlink_broadcast(nls, skb, 0, ctl->group, GFP_ATOMIC); netlink_unicast(nls, skb, 0, 0); printk(KERN_INFO "Request was sent. Group=0x%x.\n", ctl->group); return 0; nlmsg_failure: printk(KERN_ERR "Failed to send %u.%u\n", msg->seq, msg->ack); kfree_skb(skb); return -EINVAL; } static u32 cn_test_timer_counter; static void cn_test_timer_func(unsigned long __data) { struct cn_msg *m; char data[32]; m = kmalloc(sizeof(*m) + sizeof(data), GFP_ATOMIC); if (m) { memset(m, 0, sizeof(*m) + sizeof(data)); memcpy(&m->id, &cn_test_id, sizeof(m->id)); m->seq = cn_test_timer_counter; m->len = sizeof(data); m->len = scnprintf(data, sizeof(data), "counter = %u", cn_test_timer_counter) + 1; memcpy(m + 1, data, m->len); cn_netlink_send(m, 0, gfp_any()); kfree(m); } cn_test_timer_counter++; mod_timer(&cn_test_timer, jiffies + HZ); } static int cn_test_init(void) { int err; err = cn_add_callback(&cn_test_id, cn_test_name, cn_test_callback); if (err) goto err_out; cn_test_id.val++; err = cn_add_callback(&cn_test_id, cn_test_name, cn_test_callback); if (err) { cn_del_callback(&cn_test_id); goto err_out; } init_timer(&cn_test_timer); cn_test_timer.function = cn_test_timer_func; cn_test_timer.expires = jiffies + HZ; cn_test_timer.data = 0; add_timer(&cn_test_timer); return 0; err_out: if (nls && nls->sk_socket) sock_release(nls->sk_socket); return err; } static void cn_test_fini(void) { del_timer_sync(&cn_test_timer); cn_del_callback(&cn_test_id); cn_test_id.val--; cn_del_callback(&cn_test_id); if (nls && nls->sk_socket) sock_release(nls->sk_socket); } module_init(cn_test_init); module_exit(cn_test_fini); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Evgeniy Polyakov <johnpol@2ka.mipt.ru>"); MODULE_DESCRIPTION("Connector's test module");