add new "log (updates|all)" configuration option to log state

notifications after completed host checks.  either only log the
"updates" to new states or log "all" state notifications, even if the
state didn't change. the log messages will be reported to syslog or to
stderr if the daemon is running in foreground mode.

ok claudio@ pyr@

5 files changed, 132 insertions, 27 deletions

diff --git a/usr.sbin/relayd/hce.c b/usr.sbin/relayd/hce.c
index 831be46bffb..4ee1a0135b4 100644
--- a/usr.sbin/relayd/hce.c
+++ b/usr.sbin/relayd/hce.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: hce.c,v 1.14 2007/02/07 14:39:45 reyk Exp $	*/
+/*	$OpenBSD: hce.c,v 1.15 2007/02/07 15:17:46 reyk Exp $	*/
 
 /*
  * Copyright (c) 2006 Pierre-Yves Ritschard <pyr@spootnik.org>
@@ -207,17 +207,43 @@ hce_launch_checks(int fd, short event, void *arg)
 void
 hce_notify_done(struct host *host, const char *msg)
 {
+	struct table		*table;
 	struct ctl_status	 st;
+	struct timeval		 tv_now, tv_dur;
+	u_long			 duration;
+	u_int			 logopt;
 
 	st.id = host->id;
 	st.up = host->up;
 	host->flags |= (F_CHECK_SENT|F_CHECK_DONE);
 	if (msg)
 		log_debug("hce_notify_done: %s (%s)", host->name, msg);
+
 	if (host->up != host->last_up) {
+		logopt = HOSTSTATED_OPT_LOGUPDATE;
 		imsg_compose(ibuf_pfe, IMSG_HOST_STATUS, 0, 0, &st, sizeof(st));
-		host->last_up = host->up;
+	} else
+		logopt = HOSTSTATED_OPT_LOGNOTIFY;
+
+	if ((table = table_find(env, host->tableid)) == NULL)
+		fatalx("hce_notify_done: invalid table id");
+
+	if (gettimeofday(&tv_now, NULL))
+		fatal("hce_notify_done: gettimeofday");
+	timersub(&tv_now, &host->cte.tv_start, &tv_dur);
+	if (timercmp(&host->cte.tv_start, &tv_dur, >))
+		duration = (tv_dur.tv_sec * 1000) + (tv_dur.tv_usec / 1000.0);
+	else
+		duration = 0;
+
+	if (env->opts & logopt) {
+		log_info("host %s, check %s%s (%lums), state %s -> %s",
+		    host->name, table_check(table->check),
+		    (table->flags & F_SSL) ? " use ssl" : "", duration,
+		    host_status(host->last_up), host_status(host->up));
 	}
+
+	host->last_up = host->up;
 }
 
 void
diff --git a/usr.sbin/relayd/log.c b/usr.sbin/relayd/log.c
index 990f0fcde62..4fc3f35fb8c 100644
--- a/usr.sbin/relayd/log.c
+++ b/usr.sbin/relayd/log.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: log.c,v 1.2 2006/12/16 17:48:27 deraadt Exp $	*/
+/*	$OpenBSD: log.c,v 1.3 2007/02/07 15:17:46 reyk Exp $	*/
 
 /*
  * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
@@ -16,25 +16,31 @@
  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/queue.h>
+#include <sys/socket.h>
+
+#include <netinet/in_systm.h>
+#include <netinet/in.h>
+#include <netinet/ip.h>
+#include <net/if.h>
+
 #include <errno.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <syslog.h>
+#include <event.h>
+
+#include <openssl/ssl.h>
 
-/* prototypes */
-void		 log_init(int);
-void		 vlog(int, const char *, va_list);
-void		 log_warn(const char *, ...);
-void		 log_warnx(const char *, ...);
-void		 log_info(const char *, ...);
-void		 log_debug(const char *, ...);
-void		 fatal(const char *);
-void		 fatalx(const char *);
+#include "hoststated.h"
 
 int	 debug;
 
+void	 vlog(int, const char *, va_list);
 void	 logit(int, const char *, ...);
 
 void
@@ -157,3 +163,39 @@ fatalx(const char *emsg)
 	errno = 0;
 	fatal(emsg);
 }
+
+const char *
+host_status(enum host_status status)
+{
+	switch (status) {
+	case HOST_DOWN:
+		return ("down");
+	case HOST_UNKNOWN:
+		return ("unknown");
+	case HOST_UP:
+		return ("up");
+	};
+	/* NOTREACHED */
+	return ("invalid");
+}
+
+const char *
+table_check(enum table_check check)
+{
+	switch (check) {
+	case CHECK_NOCHECK:
+		return ("none");
+	case CHECK_ICMP:
+		return ("icmp");
+	case CHECK_TCP:
+		return ("tcp");
+	case CHECK_HTTP_CODE:
+		return ("http code");
+	case CHECK_HTTP_DIGEST:
+		return ("http digest");
+	case CHECK_SEND_EXPECT:
+		return ("send expect");
+	};
+	/* NOTREACHED */
+	return ("invalid");
+}
diff --git a/usr.sbin/relayd/parse.y b/usr.sbin/relayd/parse.y
index af8c69d7d35..fe81c4569aa 100644
--- a/usr.sbin/relayd/parse.y
+++ b/usr.sbin/relayd/parse.y
@@ -1,4 +1,4 @@
-/*	$OpenBSD: parse.y,v 1.22 2007/02/07 13:39:58 reyk Exp $	*/
+/*	$OpenBSD: parse.y,v 1.23 2007/02/07 15:17:46 reyk Exp $	*/
 
 /*
  * Copyright (c) 2006 Pierre-Yves Ritschard <pyr@spootnik.org>
@@ -102,10 +102,11 @@ typedef struct {
 %token  TIMEOUT CODE DIGEST PORT TAG INTERFACE
 %token	VIRTUAL IP INTERVAL DISABLE STICKYADDR
 %token	SEND EXPECT NOTHING USE SSL
+%token	LOG UPDATES ALL
 %token	ERROR
 %token	<v.string>	STRING
 %type	<v.string>	interface
-%type	<v.number>	number port http_type
+%type	<v.number>	number port http_type loglevel
 %type	<v.host>	host
 %type	<v.tv>		timeout
 
@@ -201,11 +202,16 @@ sendbuf		: NOTHING		{
 		;
 
 main		: INTERVAL number	{ conf->interval.tv_sec = $2; }
+		| LOG loglevel		{ conf->opts |= $2; }
 		| TIMEOUT timeout	{
 			bcopy(&$2, &conf->timeout, sizeof(struct timeval));
 		}
 		;
 
+loglevel	: UPDATES		{ $$ = HOSTSTATED_OPT_LOGUPDATE; }
+		| ALL			{ $$ = HOSTSTATED_OPT_LOGALL; }
+		;
+
 service		: SERVICE STRING	{
 			struct service *srv;
 
@@ -537,6 +543,7 @@ lookup(char *s)
 {
 	/* this has to be sorted always */
 	static const struct keywords keywords[] = {
+		{ "all",		ALL },
 		{ "backup",		BACKUP },
 		{ "check",		CHECK },
 		{ "code",		CODE },
@@ -551,6 +558,7 @@ lookup(char *s)
 		{ "interface",		INTERFACE },
 		{ "interval",		INTERVAL },
 		{ "ip",			IP },
+		{ "log",		LOG },
 		{ "nothing",		NOTHING },
 		{ "port",		PORT },
 		{ "real",		REAL },
@@ -562,6 +570,7 @@ lookup(char *s)
 		{ "tag",		TAG },
 		{ "tcp",		TCP },
 		{ "timeout",		TIMEOUT },
+		{ "updates",		UPDATES },
 		{ "use",		USE },
 		{ "virtual",		VIRTUAL }
 	};
diff --git a/usr.sbin/relayd/relayd.conf.5 b/usr.sbin/relayd/relayd.conf.5
index 0ff5c0c7aef..cbf5efe1ad3 100644
--- a/usr.sbin/relayd/relayd.conf.5
+++ b/usr.sbin/relayd/relayd.conf.5
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: relayd.conf.5,v 1.16 2007/01/29 18:38:15 pyr Exp $
+.\"	$OpenBSD: relayd.conf.5,v 1.17 2007/02/07 15:17:46 reyk Exp $
 .\"
 .\" Copyright (c) 2006 Pierre-Yves Ritschard <pyr@spootnik.org>
 .\"
@@ -91,6 +91,25 @@ Set the interval in seconds at which the hosts will be checked.
 The default interval is 10 seconds.
 .Pp
 .It Xo
+.Ic log
+.Pq Ic updates Ns \&| Ns Ic all
+.Xc
+Log state notifications after completed host checks.
+Either only log the
+.Ic updates
+to new states or log
+.Ic all
+state notifications, even if the state didn't change.
+The host state can be
+.Ar up
+(the health check completed successfully),
+.Ar down
+(the host is down or didn't match the check criteria),
+or
+.Ar unknown
+(the host is disabled or has not been checked yet).
+.Pp
+.It Xo
 .Ic timeout Ar number
 .Xc
 Set the global timeout in milliseconds for checks.
diff --git a/usr.sbin/relayd/relayd.h b/usr.sbin/relayd/relayd.h
index 1db8659f377..7ed5ef317f3 100644
--- a/usr.sbin/relayd/relayd.h
+++ b/usr.sbin/relayd/relayd.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: relayd.h,v 1.23 2007/02/07 13:39:58 reyk Exp $	*/
+/*	$OpenBSD: relayd.h,v 1.24 2007/02/07 15:17:46 reyk Exp $	*/
 
 /*
  * Copyright (c) 2006 Pierre-Yves Ritschard <pyr@spootnik.org>
@@ -185,9 +185,11 @@ struct host {
 };
 TAILQ_HEAD(hostlist, host);
 
-#define HOST_DOWN		-1
-#define HOST_UNKNOWN		0
-#define HOST_UP			1
+enum host_status {
+	HOST_DOWN	= -1,
+	HOST_UNKNOWN	= 0,
+	HOST_UP		= 1
+};
 
 struct table {
 	objid_t			 id;
@@ -209,12 +211,14 @@ struct table {
 };
 TAILQ_HEAD(tablelist, table);
 
-#define CHECK_NOCHECK		0
-#define CHECK_ICMP		1
-#define CHECK_TCP		2
-#define CHECK_HTTP_CODE		3
-#define CHECK_HTTP_DIGEST	4
-#define CHECK_SEND_EXPECT	5
+enum table_check {
+	CHECK_NOCHECK		= 0,
+	CHECK_ICMP		= 1,
+	CHECK_TCP		= 2,
+	CHECK_HTTP_CODE		= 3,
+	CHECK_HTTP_DIGEST	= 4,
+	CHECK_SEND_EXPECT	= 5
+};
 
 struct service {
 	objid_t			 id;
@@ -257,8 +261,11 @@ struct hoststated {
 	struct ctl_icmp_event	 icmp6_recv;
 };
 
-#define HOSTSTATED_OPT_VERBOSE	 0x01
-#define HOSTSTATED_OPT_NOACTION	 0x04
+#define HOSTSTATED_OPT_VERBOSE		0x01
+#define HOSTSTATED_OPT_NOACTION		0x04
+#define HOSTSTATED_OPT_LOGUPDATE	0x08
+#define HOSTSTATED_OPT_LOGNOTIFY	0x10
+#define HOSTSTATED_OPT_LOGALL		0x18
 
 /* initially control.h */
 struct {
@@ -304,6 +311,8 @@ void	log_info(const char *, ...);
 void	log_debug(const char *, ...);
 void	fatal(const char *);
 void	fatalx(const char *);
+const char *host_status(enum host_status);
+const char *table_check(enum table_check);
 
 /* buffer.c */
 struct buf	*buf_open(size_t);