static void syslog_sigsafe(int priority, const char *msg, size_t msglen)
{
static int syslog_fd = -1;
char buf[sizeof("<1234567890>ripngd[1234567890]: ") + msglen + 50];
char *s;
if ((syslog_fd < 0) && ((syslog_fd = syslog_connect()) < 0))
return;
#define LOC s,buf+sizeof(buf)-s
s = buf;
s = str_append(LOC, "<");
s = num_append(LOC, priority);
s = str_append(LOC, ">");
/* forget about the timestamp, too difficult in a signal handler */
s = str_append(LOC, zlog_default->ident);
if (zlog_default->syslog_options & LOG_PID) {
s = str_append(LOC, "[");
s = num_append(LOC, getpid());
s = str_append(LOC, "]");
}
s = str_append(LOC, ": ");
s = str_append(LOC, msg);
write(syslog_fd, buf, s - buf);
#undef LOC
}
static int __init ipt_log_init(void)
{
int ret;
struct proc_dir_entry *proc;
ret = xt_register_target(&ipt_log_reg);
if (ret < 0)
return ret;
proc = create_proc_entry(STAT_PROC_FS_NAME, 0, init_net.proc_net);
if (proc) {
proc->owner = THIS_MODULE;
proc->proc_fops = &ip_syslogstat_proc_fops;
} else {
printk(KERN_ERR "ip_SYSLOG: failed to create proc entry\n");
goto cleanup_target;
}
ret = syslog_connect(&sl_socket);
if (ret < 0)
{
if (ret == -ECONNREFUSED)
{
timer.expires = jiffies + msecs_to_jiffies(reconnect_freq);
add_timer(&timer);
}
else
goto cleanup_proc;
}
nf_log_register(PF_INET, &ipt_log_logger);
return 0;
cleanup_proc:
proc_net_remove(&init_net, STAT_PROC_FS_NAME);
cleanup_target:
xt_unregister_target(&ipt_log_reg);
return ret;
}
static void syslog_work_fn(struct work_struct *work)
{
struct msghdr msg;
struct kvec iov;
int ret;
size_t n = 0;
struct logs * log_entry;
if (sl_socket != NULL)
goto cont;
ret = syslog_connect(&sl_socket);
if (ret >= 0)
goto cont;
if (!timer_pending(&timer))
{
timer.expires = jiffies + msecs_to_jiffies(reconnect_freq);
add_timer(&timer);
}
return ;
cont:
if (list_empty(&logs_list))
return;
spin_lock_irq(&log_lock);
while (!list_empty(&logs_list))
{
log_entry = list_first_entry(&logs_list, struct logs, logs_list);
printk(KERN_DEBUG "ip_syslog: work data (%d): %d\n", counter, log_entry->counter);
n = strlen(log_entry->data);
iov.iov_base = (void *)log_entry->data;
iov.iov_len = n;
msg.msg_name = NULL;
msg.msg_namelen = 0;
msg.msg_iov = (struct iovec *)&iov;
msg.msg_iovlen = 1;
msg.msg_control = NULL;
msg.msg_controllen = 0;
msg.msg_namelen = 0;
msg.msg_flags = MSG_DONTWAIT|MSG_NOSIGNAL;
ret = kernel_sendmsg(sl_socket, &msg, &iov, 1, n);
if (ret < 0)
{
printk("ip_syslog: kernel_sendmsg error:%d\n", ret);
if (ret == -EPIPE)
{
syslog_close(&sl_socket);
schedule_work(&syslog_work);
}
break;
}
loglist_total--;
list_del(&log_entry->logs_list);
kfree(log_entry->data);
kfree(log_entry);
}
spin_unlock_irq(&log_lock);
return ;
}