/* error logging functions
 * Copyright (C) 1997 Angelos D. Keromytis.
 * Copyright (C) 1998-2001 D. Hugh Redelmeier.
 * Copyright (C) 2009 Andreas Steffen - Hochschule fuer Technik Rapperswil
 *
 * 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.  See <http://www.fsf.org/copyleft/gpl.txt>.
 *
 * 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.
 */

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <stdarg.h>
#include <syslog.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <signal.h>     /* used only if MSG_NOSIGNAL not defined */
#include <sys/queue.h>
#include <libgen.h>
#include <sys/stat.h>
#include <sys/types.h>

#include <freeswan.h>
#include <library.h>
#include <debug.h>

#include "constants.h"
#include "defs.h"
#include "log.h"
#include "server.h"
#include "state.h"
#include "connections.h"
#include "myid.h"
#include "kernel.h"
#include "whack.h"      /* needs connections.h */
#include "timer.h"

/* close one per-peer log */
static void perpeer_logclose(connection_t *c);     /* forward */


bool
	log_to_stderr = TRUE,       /* should log go to stderr? */
	log_to_syslog = TRUE,       /* should log go to syslog? */
	log_to_perpeer= FALSE;      /* should log go to per-IP file? */

bool
	logged_txt_warning = FALSE;  /* should we complain about finding KEY? */

/* should we complain when we find no local id */
bool
	logged_myid_fqdn_txt_warning = FALSE,
	logged_myid_ip_txt_warning   = FALSE,
	logged_myid_fqdn_key_warning = FALSE,
	logged_myid_ip_key_warning   = FALSE;

/* may include trailing / */
const char *base_perpeer_logdir = PERPEERLOGDIR;
static int perpeer_count = 0;

/* from sys/queue.h */
static TAILQ_HEAD(perpeer, connection) perpeer_list;


/* Context for logging.
 *
 * Global variables: must be carefully adjusted at transaction boundaries!
 * If the context provides a whack file descriptor, messages
 * should be copied to it -- see whack_log()
 */
int whack_log_fd = NULL_FD;     /* only set during whack_handle() */
struct state *cur_state = NULL; /* current state, for diagnostics */
connection_t *cur_connection = NULL;       /* current connection, for diagnostics */
const ip_address *cur_from = NULL;      /* source of current current message */
u_int16_t cur_from_port;        /* host order */

/**
 * pluto dbg function for libstrongswan
 */
static void pluto_dbg(int level, char *fmt, ...)
{
	int priority = LOG_INFO;
	int debug_level;
	char buffer[8192];
	char *current = buffer, *next;
	va_list args;

	if (cur_debugging & DBG_PRIVATE)
	{
		debug_level = 4;
	}
	else if (cur_debugging & DBG_RAW)
	{
		debug_level = 3;
	}
	else if (cur_debugging & DBG_PARSING)
	{
		debug_level = 2;
	}
	else
	{
		debug_level = 1;
	}

	if (level <= debug_level)
	{
		va_start(args, fmt);

		if (log_to_stderr)
		{
			if (level > 1)
			{
				fprintf(stderr, "| ");
			}
			vfprintf(stderr, fmt, args);
			fprintf(stderr, "\n");
		}
		if (log_to_syslog)
		{
			/* write in memory buffer first */
			vsnprintf(buffer, sizeof(buffer), fmt, args);

			/* do a syslog with every line */
			while (current)
			{
				next = strchr(current, '\n');
				if (next)
				{
					*(next++) = '\0';
				}
				syslog(priority, "%s%s\n", (level > 1)? "| ":"", current);
				current = next;
			}
		}
		va_end(args);
	}
}

void
init_log(const char *program)
{
	/* enable pluto debugging hook for libstrongswan */
	dbg = pluto_dbg;

	if (log_to_stderr)
	{
		setbuf(stderr, NULL);
	}
	if (log_to_syslog)
	{
		openlog(program, LOG_CONS | LOG_NDELAY | LOG_PID, LOG_AUTHPRIV);
	}
	TAILQ_INIT(&perpeer_list);
}

void
close_peerlog(void)
{
	/* exit if the queue has not been initialized */
	if (perpeer_list.tqh_first == NULL)
	  return;

	/* end of queue is given by pointer to "HEAD" */
	while (TAILQ_LAST(&perpeer_list, perpeer) != (void *)&perpeer_list)
	   perpeer_logclose(TAILQ_LAST(&perpeer_list, perpeer));
}

void
close_log(void)
{
	if (log_to_syslog)
		closelog();

	close_peerlog();
}

/* Sanitize character string in situ: turns dangerous characters into \OOO.
 * With a bit of work, we could use simpler reps for \\, \r, etc.,
 * but this is only to protect against something that shouldn't be used.
 * Truncate resulting string to what fits in buffer.
 */
static size_t
sanitize(char *buf, size_t size)
{
#   define UGLY_WIDTH   4       /* width for ugly character: \OOO */
	size_t len;
	size_t added = 0;
	char *p;

	passert(size >= UGLY_WIDTH);        /* need room to swing cat */

	/* find right side of string to be sanitized and count
	 * number of columns to be added.  Stop on end of string
	 * or lack of room for more result.
	 */
	for (p = buf; *p != '\0' && &p[added] < &buf[size - UGLY_WIDTH]; )
	{
		unsigned char c = *p++;

		if (c == '\\' || !isprint(c))
			added += UGLY_WIDTH - 1;
	}

	/* at this point, p points after last original character to be
	 * included.  added is how many characters are added to sanitize.
	 * so p[added] will point after last sanitized character.
	 */

	p[added] = '\0';
	len = &p[added] - buf;

	/* scan backwards, copying characters to their new home
	 * and inserting the expansions for ugly characters.
	 * It is finished when no more shifting is required.
	 * This is a predecrement loop.
	 */
	while (added != 0)
	{
		char fmtd[UGLY_WIDTH + 1];
		unsigned char c;

		while ((c = *--p) != '\\' && isprint(c))
			p[added] = c;
		added -= UGLY_WIDTH - 1;
		snprintf(fmtd, sizeof(fmtd), "\\%03o", c);
		memcpy(p + added, fmtd, UGLY_WIDTH);
	}
	return len;
#   undef UGLY_WIDTH
}

/* format a string for the log, with suitable prefixes.
 * A format starting with ~ indicates that this is a reprocessing
 * of the message, so prefixing and quoting is suppressed.
 */
static void
fmt_log(char *buf, size_t buf_len, const char *fmt, va_list ap)
{
	bool reproc = *fmt == '~';
	size_t ps;
	connection_t *c = cur_state != NULL ? cur_state->st_connection
		: cur_connection;

	buf[0] = '\0';
	if (reproc)
		fmt++;  /* ~ at start of format suppresses this prefix */
	else if (c != NULL)
	{
		/* start with name of connection */
		char *const be = buf + buf_len;
		char *bp = buf;

		snprintf(bp, be - bp, "\"%s\"", c->name);
		bp += strlen(bp);

		/* if it fits, put in any connection instance information */
		if (be - bp > CONN_INST_BUF)
		{
			fmt_conn_instance(c, bp);
			bp += strlen(bp);
		}

		if (cur_state != NULL)
		{
			/* state number */
			snprintf(bp, be - bp, " #%lu", cur_state->st_serialno);
			bp += strlen(bp);
		}
		snprintf(bp, be - bp, ": ");
	}
	else if (cur_from != NULL)
	{
		/* peer's IP address */
		/* Note: must not use ip_str() because our caller might! */
		char ab[ADDRTOT_BUF];

		(void) addrtot(cur_from, 0, ab, sizeof(ab));
		snprintf(buf, buf_len, "packet from %s:%u: "
			, ab, (unsigned)cur_from_port);
	}

	ps = strlen(buf);
	vsnprintf(buf + ps, buf_len - ps, fmt, ap);
	if (!reproc)
		(void)sanitize(buf, buf_len);
}

static void
perpeer_logclose(connection_t *c)
{
	/* only free/close things if we had used them! */
	if (c->log_file != NULL)
	{
		passert(perpeer_count > 0);

		TAILQ_REMOVE(&perpeer_list, c, log_link);
		perpeer_count--;
		fclose(c->log_file);
		c->log_file=NULL;
	}
}

void
perpeer_logfree(connection_t *c)
{
	perpeer_logclose(c);
	if (c->log_file_name != NULL)
	{
		free(c->log_file_name);
		c->log_file_name = NULL;
		c->log_file_err = FALSE;
	}
}

/* open the per-peer log */
static void
open_peerlog(connection_t *c)
{
	syslog(LOG_INFO, "opening log file for conn %s", c->name);

	if (c->log_file_name == NULL)
	{
		char peername[ADDRTOT_BUF], dname[ADDRTOT_BUF];
		int  peernamelen, lf_len;

		addrtot(&c->spd.that.host_addr, 'Q', peername, sizeof(peername));
		peernamelen = strlen(peername);

		/* copy IP address, turning : and . into / */
		{
			char c, *p, *q;

			p = peername;
			q = dname;
			do {
				c = *p++;
				if (c == '.' || c == ':')
					c = '/';
				*q++ = c;
			} while (c != '\0');
		}

		lf_len = peernamelen * 2
			+ strlen(base_perpeer_logdir)
			+ sizeof("//.log")
			+ 1;
		c->log_file_name = malloc(lf_len);

		fprintf(stderr, "base dir |%s| dname |%s| peername |%s|"
				, base_perpeer_logdir, dname, peername);
		snprintf(c->log_file_name, lf_len, "%s/%s/%s.log"
				 , base_perpeer_logdir, dname, peername);

		syslog(LOG_DEBUG, "conn %s logfile is %s", c->name, c->log_file_name);
	}

	/* now open the file, creating directories if necessary */

	{  /* create the directory */
		char *dname;
		int   bpl_len = strlen(base_perpeer_logdir);
		char *slashloc;

		dname = clone_str(c->log_file_name);
		dname = dirname(dname);

		if (access(dname, W_OK) != 0)
		{
			if (errno != ENOENT)
			{
				if (c->log_file_err)
				{
					syslog(LOG_CRIT, "can not write to %s: %s"
						   , dname, strerror(errno));
					c->log_file_err = TRUE;
					free(dname);
					return;
				}
			}

			/* directory does not exist, walk path creating dirs */
			/* start at base_perpeer_logdir */
			slashloc = dname + bpl_len;
			slashloc++;    /* since, by construction there is a slash
							  right there */

			while (*slashloc != '\0')
			{
				char saveslash;

				/* look for next slash */
				while (*slashloc != '\0' && *slashloc != '/') slashloc++;

				saveslash = *slashloc;

				*slashloc = '\0';

				if (mkdir(dname, 0750) != 0 && errno != EEXIST)
				{
					syslog(LOG_CRIT, "can not create dir %s: %s"
						   , dname, strerror(errno));
					c->log_file_err = TRUE;
					free(dname);
					return;
				}
				syslog(LOG_DEBUG, "created new directory %s", dname);
				*slashloc = saveslash;
				slashloc++;
			}
		}
		free(dname);
	}

	c->log_file = fopen(c->log_file_name, "a");
	if (c->log_file == NULL)
	{
		if (c->log_file_err)
		{
			syslog(LOG_CRIT, "logging system can not open %s: %s"
				   , c->log_file_name, strerror(errno));
			c->log_file_err = TRUE;
		}
		return;
	}

	/* look for a connection to close! */
	while (perpeer_count >= MAX_PEERLOG_COUNT)
	{
		/* can not be NULL because perpeer_count > 0 */
		passert(TAILQ_LAST(&perpeer_list, perpeer) != (void *)&perpeer_list);

		perpeer_logclose(TAILQ_LAST(&perpeer_list, perpeer));
	}

	/* insert this into the list */
	TAILQ_INSERT_HEAD(&perpeer_list, c, log_link);
	passert(c->log_file != NULL);
	perpeer_count++;
}

/* log a line to cur_connection's log */
static void
peerlog(const char *prefix, const char *m)
{
	if (cur_connection == NULL)
	{
		/* we can not log it in this case. Oh well. */
		return;
	}

	if (cur_connection->log_file == NULL)
	{
		open_peerlog(cur_connection);
	}

	/* despite our attempts above, we may not be able to open the file. */
	if (cur_connection->log_file != NULL)
	{
		char datebuf[32];
		time_t n;
		struct tm *t;

		time(&n);
		t = localtime(&n);

		strftime(datebuf, sizeof(datebuf), "%Y-%m-%d %T", t);
		fprintf(cur_connection->log_file, "%s %s%s\n", datebuf, prefix, m);

		/* now move it to the front of the list */
		TAILQ_REMOVE(&perpeer_list, cur_connection, log_link);
		TAILQ_INSERT_HEAD(&perpeer_list, cur_connection, log_link);
	}
}

void
plog(const char *message, ...)
{
	va_list args;
	char m[LOG_WIDTH];  /* longer messages will be truncated */

	va_start(args, message);
	fmt_log(m, sizeof(m), message, args);
	va_end(args);

	if (log_to_stderr)
		fprintf(stderr, "%s\n", m);
	if (log_to_syslog)
		syslog(LOG_WARNING, "%s", m);
	if (log_to_perpeer)
		peerlog("", m);

	whack_log(RC_LOG, "~%s", m);
}

void
loglog(int mess_no, const char *message, ...)
{
	va_list args;
	char m[LOG_WIDTH];  /* longer messages will be truncated */

	va_start(args, message);
	fmt_log(m, sizeof(m), message, args);
	va_end(args);

	if (log_to_stderr)
		fprintf(stderr, "%s\n", m);
	if (log_to_syslog)
		syslog(LOG_WARNING, "%s", m);
	if (log_to_perpeer)
		peerlog("", m);

	whack_log(mess_no, "~%s", m);
}

void
log_errno_routine(int e, const char *message, ...)
{
	va_list args;
	char m[LOG_WIDTH];  /* longer messages will be truncated */

	va_start(args, message);
	fmt_log(m, sizeof(m), message, args);
	va_end(args);

	if (log_to_stderr)
		fprintf(stderr, "ERROR: %s. Errno %d: %s\n", m, e, strerror(e));
	if (log_to_syslog)
		syslog(LOG_ERR, "ERROR: %s. Errno %d: %s", m, e, strerror(e));
	if (log_to_perpeer)
	{
		peerlog(strerror(e), m);
	}

	whack_log(RC_LOG_SERIOUS
		, "~ERROR: %s. Errno %d: %s", m, e, strerror(e));
}

void
exit_log(const char *message, ...)
{
	va_list args;
	char m[LOG_WIDTH];  /* longer messages will be truncated */

	va_start(args, message);
	fmt_log(m, sizeof(m), message, args);
	va_end(args);

	if (log_to_stderr)
		fprintf(stderr, "FATAL ERROR: %s\n", m);
	if (log_to_syslog)
		syslog(LOG_ERR, "FATAL ERROR: %s", m);
	if (log_to_perpeer)
		peerlog("FATAL ERROR: ", m);

	whack_log(RC_LOG_SERIOUS, "~FATAL ERROR: %s", m);

	exit_pluto(1);
}

void
exit_log_errno_routine(int e, const char *message, ...)
{
	va_list args;
	char m[LOG_WIDTH];  /* longer messages will be truncated */

	va_start(args, message);
	fmt_log(m, sizeof(m), message, args);
	va_end(args);

	if (log_to_stderr)
		fprintf(stderr, "FATAL ERROR: %s. Errno %d: %s\n", m, e, strerror(e));
	if (log_to_syslog)
		syslog(LOG_ERR, "FATAL ERROR: %s. Errno %d: %s", m, e, strerror(e));
	if (log_to_perpeer)
		peerlog(strerror(e), m);

	whack_log(RC_LOG_SERIOUS
		, "~FATAL ERROR: %s. Errno %d: %s", m, e, strerror(e));

	exit_pluto(1);
}

/* emit message to whack.
 * form is "ddd statename text" where
 * - ddd is a decimal status code (RC_*) as described in whack.h
 * - text is a human-readable annotation
 */
#ifdef DEBUG
static volatile sig_atomic_t dying_breath = FALSE;
#endif

void
whack_log(int mess_no, const char *message, ...)
{
	int wfd = whack_log_fd != NULL_FD ? whack_log_fd
		: cur_state != NULL ? cur_state->st_whack_sock
		: NULL_FD;

	if (wfd != NULL_FD
#ifdef DEBUG
	|| dying_breath
#endif
	)
	{
		va_list args;
		char m[LOG_WIDTH];      /* longer messages will be truncated */
		int prelen = snprintf(m, sizeof(m), "%03d ", mess_no);

		passert(prelen >= 0);

		va_start(args, message);
		fmt_log(m+prelen, sizeof(m)-prelen, message, args);
		va_end(args);

#if DEBUG
		if (dying_breath)
		{
			/* status output copied to log */
			if (log_to_stderr)
				fprintf(stderr, "%s\n", m + prelen);
			if (log_to_syslog)
				syslog(LOG_WARNING, "%s", m + prelen);
			if (log_to_perpeer)
				peerlog("", m);
		}
#endif

		if (wfd != NULL_FD)
		{
			/* write to whack socket, but suppress possible SIGPIPE */
			size_t len = strlen(m);
#ifdef MSG_NOSIGNAL     /* depends on version of glibc??? */
			m[len] = '\n';      /* don't need NUL, do need NL */
			(void) send(wfd, m, len + 1, MSG_NOSIGNAL);
#else /* !MSG_NOSIGNAL */
			int r;
			struct sigaction act
				, oldact;

			m[len] = '\n';      /* don't need NUL, do need NL */
			act.sa_handler = SIG_IGN;
			sigemptyset(&act.sa_mask);
			act.sa_flags = 0;   /* no nothing */
			r = sigaction(SIGPIPE, &act, &oldact);
			passert(r == 0);

			(void) write(wfd, m, len + 1);

			r = sigaction(SIGPIPE, &oldact, NULL);
			passert(r == 0);
#endif /* !MSG_NOSIGNAL */
		}
	}
}

/* Build up a diagnostic in a static buffer.
 * Although this would be a generally useful function, it is very
 * hard to come up with a discipline that prevents different uses
 * from interfering.  It is intended that by limiting it to building
 * diagnostics, we will avoid this problem.
 * Juggling is performed to allow an argument to be a previous
 * result: the new string may safely depend on the old one.  This
 * restriction is not checked in any way: violators will produce
 * confusing results (without crashing!).
 */
char diag_space[sizeof(diag_space)];

err_t
builddiag(const char *fmt, ...)
{
	static char diag_space[LOG_WIDTH];  /* longer messages will be truncated */
	char t[sizeof(diag_space)]; /* build result here first */
	va_list args;

	va_start(args, fmt);
	t[0] = '\0';        /* in case nothing terminates string */
	vsnprintf(t, sizeof(t), fmt, args);
	va_end(args);
	strcpy(diag_space, t);
	return diag_space;
}

/* Debugging message support */

#ifdef DEBUG

void
switch_fail(int n, const char *file_str, unsigned long line_no)
{
	char buf[30];

	snprintf(buf, sizeof(buf), "case %d unexpected", n);
	passert_fail(buf, file_str, line_no);
}

void
passert_fail(const char *pred_str, const char *file_str, unsigned long line_no)
{
	/* we will get a possibly unplanned prefix.  Hope it works */
	loglog(RC_LOG_SERIOUS, "ASSERTION FAILED at %s:%lu: %s", file_str, line_no, pred_str);
	if (!dying_breath)
	{
		dying_breath = TRUE;
		show_status(TRUE, NULL);
	}
	abort();    /* exiting correctly doesn't always work */
}

void
pexpect_log(const char *pred_str, const char *file_str, unsigned long line_no)
{
	/* we will get a possibly unplanned prefix.  Hope it works */
	loglog(RC_LOG_SERIOUS, "EXPECTATION FAILED at %s:%lu: %s", file_str, line_no, pred_str);
}

lset_t
	base_debugging = DBG_NONE,  /* default to reporting nothing */
	cur_debugging =  DBG_NONE;

void
extra_debugging(const connection_t *c)
{
	if(c == NULL)
	{
		reset_debugging();
		return;
	}

	if (c!= NULL && c->extra_debugging != 0)
	{
		plog("enabling for connection: %s"
			, bitnamesof(debug_bit_names, c->extra_debugging & ~cur_debugging));
		cur_debugging |= c->extra_debugging;
	}
}

/* log a debugging message (prefixed by "| ") */

void
DBG_log(const char *message, ...)
{
	va_list args;
	char m[LOG_WIDTH];  /* longer messages will be truncated */

	va_start(args, message);
	vsnprintf(m, sizeof(m), message, args);
	va_end(args);

	(void)sanitize(m, sizeof(m));

	if (log_to_stderr)
		fprintf(stderr, "| %s\n", m);
	if (log_to_syslog)
		syslog(LOG_DEBUG, "| %s", m);
	if (log_to_perpeer)
		peerlog("| ", m);
}

/* dump raw bytes in hex to stderr (for lack of any better destination) */

void
DBG_dump(const char *label, const void *p, size_t len)
{
#   define DUMP_LABEL_WIDTH 20  /* arbitrary modest boundary */
#   define DUMP_WIDTH   (4 * (1 + 4 * 3) + 1)
	char buf[DUMP_LABEL_WIDTH + DUMP_WIDTH];
	char *bp;
	const unsigned char *cp = p;

	bp = buf;

	if (label != NULL && label[0] != '\0')
	{
		/* Handle the label.  Care must be taken to avoid buffer overrun. */
		size_t llen = strlen(label);

		if (llen + 1 > sizeof(buf))
		{
			DBG_log("%s", label);
		}
		else
		{
			strcpy(buf, label);
			if (buf[llen-1] == '\n')
			{
				buf[llen-1] = '\0';     /* get rid of newline */
				DBG_log("%s", buf);
			}
			else if (llen < DUMP_LABEL_WIDTH)
			{
				bp = buf + llen;
			}
			else
			{
				DBG_log("%s", buf);
			}
		}
	}

	do {
		int i, j;

		for (i = 0; len!=0 && i!=4; i++)
		{
			*bp++ = ' ';
			for (j = 0; len!=0 && j!=4; len--, j++)
			{
				static const char hexdig[] = "0123456789abcdef";

				*bp++ = ' ';
				*bp++ = hexdig[(*cp >> 4) & 0xF];
				*bp++ = hexdig[*cp & 0xF];
				cp++;
			}
		}
		*bp = '\0';
		DBG_log("%s", buf);
		bp = buf;
	} while (len != 0);
#   undef DUMP_LABEL_WIDTH
#   undef DUMP_WIDTH
}

#endif /* DEBUG */

static void show_loaded_plugins()
{
	char buf[BUF_LEN], *plugin;
	int len = 0;
	enumerator_t *enumerator;

	buf[0] = '\0';
	enumerator = lib->plugins->create_plugin_enumerator(lib->plugins);
	while (len < BUF_LEN && enumerator->enumerate(enumerator, &plugin))
	{
		len += snprintf(&buf[len], BUF_LEN-len, "%s ", plugin);
	}
	enumerator->destroy(enumerator);
	whack_log(RC_COMMENT, "loaded plugins: %s", buf);
}

void show_status(bool all, const char *name)
{
	if (all)
	{
		whack_log(RC_COMMENT, "Status of IKEv1 pluto daemon (strongSwan "VERSION"):");
		show_ifaces_status();
		show_myid_status();
		show_loaded_plugins();
		show_debug_status();
		whack_log(RC_COMMENT, BLANK_FORMAT);    /* spacer */
	}
	show_connections_status(all, name);
	show_states_status(all, name);
#ifdef KLIPS
	show_shunt_status();
#endif
}

/* ip_str: a simple to use variant of addrtot.
 * It stores its result in a static buffer.
 * This means that newer calls overwrite the storage of older calls.
 * Note: this is not used in any of the logging functions, so their
 * callers may use it.
 */
const char *
ip_str(const ip_address *src)
{
	static char buf[ADDRTOT_BUF];

	addrtot(src, 0, buf, sizeof(buf));
	return buf;
}

/*
 * a routine that attempts to schedule itself daily.
 *
 */

void
daily_log_reset(void)
{
	/* now perform actions */
	logged_txt_warning = FALSE;

	logged_myid_fqdn_txt_warning = FALSE;
	logged_myid_ip_txt_warning   = FALSE;
	logged_myid_fqdn_key_warning = FALSE;
	logged_myid_ip_key_warning   = FALSE;
}

void
daily_log_event(void)
{
	struct tm lt;
	time_t t, interval;

	/* attempt to schedule oneself to midnight, local time
	 * do this by getting seconds in the day, and delaying
	 * by 86400 - 3600*hours - 60*minutes - seconds.
	 */
	time(&t);
	localtime_r(&t, &lt);
	interval = 3600 * (24 - lt.tm_hour) - 60 * lt.tm_min - lt.tm_sec;

	event_schedule(EVENT_LOG_DAILY, interval, NULL);
	daily_log_reset();
}

/*
 * Local Variables:
 * c-basic-offset:4
 * c-style: pluto
 * End:
 */