s3/ldap: use monotonic clock for timeouts in smbldap

tevent would need monotonic clock features to make also smbldap's idle handling
aware of backward clock jumps. Other areas in smbldap are clock jump save now.

2 files changed, 26 insertions, 20 deletions

diff --git a/source3/include/smbldap.h b/source3/include/smbldap.h
index 69b4153f28..060fcc21eb 100644
--- a/source3/include/smbldap.h
+++ b/source3/include/smbldap.h
@@ -153,7 +153,7 @@ int smbldap_modify(struct smbldap_state *ldap_state,
 struct smbldap_state {
 	LDAP *ldap_struct;
 	pid_t pid;
-	time_t last_ping;
+	time_t last_ping; /* monotonic */
 	/* retrive-once info */
 	const char *uri;
 
@@ -166,11 +166,11 @@ struct smbldap_state {
 
 	unsigned int num_failures;
 
-	time_t last_use;
+	time_t last_use; /* monotonic */
 	struct event_context *event_context;
 	struct timed_event *idle_event;
 
-	struct timeval last_rebind;
+	struct timeval last_rebind; /* monotonic */
 };
 
 /* struct used by both pdb_ldap.c and pdb_nds.c */
diff --git a/source3/lib/smbldap.c b/source3/lib/smbldap.c
index 996c1c4c85..67e3d4dc1b 100644
--- a/source3/lib/smbldap.c
+++ b/source3/lib/smbldap.c
@@ -958,6 +958,7 @@ static int rebindproc_with_state  (LDAP * ld, char **whop, char **credp,
 				   int *methodp, int freeit, void *arg)
 {
 	struct smbldap_state *ldap_state = arg;
+	struct timespec ts;
 
 	/** @TODO Should we be doing something to check what servers we rebind to?
 	    Could we get a referral to a machine that we don't want to give our
@@ -990,7 +991,8 @@ static int rebindproc_with_state  (LDAP * ld, char **whop, char **credp,
 		*methodp = LDAP_AUTH_SIMPLE;
 	}
 
-	GetTimeOfDay(&ldap_state->last_rebind);
+	clock_gettime_mono(&ts);
+	ldap_state->last_rebind = convert_timespec_to_timeval(ts);
 
 	return 0;
 }
@@ -1010,6 +1012,7 @@ static int rebindproc_connect_with_state (LDAP *ldap_struct,
 	struct smbldap_state *ldap_state =
 		(struct smbldap_state *)arg;
 	int rc;
+	struct timespec ts;
 	int version;
 
 	DEBUG(5,("rebindproc_connect_with_state: Rebinding to %s as \"%s\"\n", 
@@ -1042,7 +1045,8 @@ static int rebindproc_connect_with_state (LDAP *ldap_struct,
 			DEBUG(10,("rebindproc_connect_with_state: "
 				"setting last_rebind timestamp "
 				"(req: 0x%02x)\n", (unsigned int)request));
-			GetTimeOfDay(&ldap_state->last_rebind);
+			clock_gettime_mono(&ts);
+			ldap_state->last_rebind = convert_timespec_to_timeval(ts);
 			break;
 		default:
 			ZERO_STRUCT(ldap_state->last_rebind);
@@ -1168,7 +1172,7 @@ static int smbldap_connect_system(struct smbldap_state *ldap_state, LDAP * ldap_
 
 static void smbldap_idle_fn(struct event_context *event_ctx,
 			    struct timed_event *te,
-			    struct timeval now,
+			    struct timeval now_abs,
 			    void *private_data);
 
 /**********************************************************************
@@ -1180,7 +1184,7 @@ static int smbldap_open(struct smbldap_state *ldap_state)
 	bool reopen = False;
 	SMB_ASSERT(ldap_state);
 
-	if ((ldap_state->ldap_struct != NULL) && ((ldap_state->last_ping + SMBLDAP_DONT_PING_TIME) < time(NULL))) {
+	if ((ldap_state->ldap_struct != NULL) && ((ldap_state->last_ping + SMBLDAP_DONT_PING_TIME) < time_mono(NULL))) {
 
 #ifdef HAVE_UNIXSOCKET
 		struct sockaddr_un addr;
@@ -1204,7 +1208,7 @@ static int smbldap_open(struct smbldap_state *ldap_state)
 		    	ldap_state->ldap_struct = NULL;
 		    	ldap_state->last_ping = (time_t)0;
 		} else {
-			ldap_state->last_ping = time(NULL);
+			ldap_state->last_ping = time_mono(NULL);
 		} 
     	}
 
@@ -1224,7 +1228,7 @@ static int smbldap_open(struct smbldap_state *ldap_state)
 	}
 
 
-	ldap_state->last_ping = time(NULL);
+	ldap_state->last_ping = time_mono(NULL);
 	ldap_state->pid = sys_getpid();
 
 	TALLOC_FREE(ldap_state->idle_event);
@@ -1274,7 +1278,7 @@ static void gotalarm_sig(int dummy)
 static int another_ldap_try(struct smbldap_state *ldap_state, int *rc,
 			    int *attempts, time_t endtime)
 {
-	time_t now = time(NULL);
+	time_t now = time_mono(NULL);
 	int open_rc = LDAP_SERVER_DOWN;
 
 	if (*rc != LDAP_SERVER_DOWN)
@@ -1347,7 +1351,7 @@ static int smbldap_search_ext(struct smbldap_state *ldap_state,
 	int 		rc = LDAP_SERVER_DOWN;
 	int 		attempts = 0;
 	char           *utf8_filter;
-	time_t		endtime = time(NULL)+lp_ldap_timeout();
+	time_t		endtime = time_mono(NULL)+lp_ldap_timeout();
 	struct		timeval timeout;
 	size_t		converted_size;
 
@@ -1358,11 +1362,12 @@ static int smbldap_search_ext(struct smbldap_state *ldap_state,
 
 	if (ldap_state->last_rebind.tv_sec > 0) {
 		struct timeval	tval;
+		struct timespec ts;
 		int64_t	tdiff = 0;
 		int		sleep_time = 0;
 
-		ZERO_STRUCT(tval);
-		GetTimeOfDay(&tval);
+		clock_gettime_mono(&ts);
+		tval = convert_timespec_to_timeval(ts);
 
 		tdiff = usec_time_diff(&tval, &ldap_state->last_rebind);
 		tdiff /= 1000; /* Convert to milliseconds. */
@@ -1545,7 +1550,7 @@ int smbldap_modify(struct smbldap_state *ldap_state, const char *dn, LDAPMod *at
 	int 		rc = LDAP_SERVER_DOWN;
 	int 		attempts = 0;
 	char           *utf8_dn;
-	time_t		endtime = time(NULL)+lp_ldap_timeout();
+	time_t		endtime = time_mono(NULL)+lp_ldap_timeout();;
 	size_t		converted_size;
 
 	SMB_ASSERT(ldap_state);
@@ -1589,7 +1594,7 @@ int smbldap_add(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs
 	int 		rc = LDAP_SERVER_DOWN;
 	int 		attempts = 0;
 	char           *utf8_dn;
-	time_t		endtime = time(NULL)+lp_ldap_timeout();
+	time_t		endtime = time_mono(NULL)+lp_ldap_timeout();;
 	size_t		converted_size;
 
 	SMB_ASSERT(ldap_state);
@@ -1633,7 +1638,7 @@ int smbldap_delete(struct smbldap_state *ldap_state, const char *dn)
 	int 		rc = LDAP_SERVER_DOWN;
 	int 		attempts = 0;
 	char           *utf8_dn;
-	time_t		endtime = time(NULL)+lp_ldap_timeout();
+	time_t		endtime = time_mono(NULL)+lp_ldap_timeout();;
 	size_t		converted_size;
 
 	SMB_ASSERT(ldap_state);
@@ -1679,7 +1684,7 @@ int smbldap_extended_operation(struct smbldap_state *ldap_state,
 {
 	int 		rc = LDAP_SERVER_DOWN;
 	int 		attempts = 0;
-	time_t		endtime = time(NULL)+lp_ldap_timeout();
+	time_t		endtime = time_mono(NULL)+lp_ldap_timeout();
 
 	if (!ldap_state)
 		return (-1);
@@ -1726,7 +1731,7 @@ int smbldap_search_suffix (struct smbldap_state *ldap_state,
 
 static void smbldap_idle_fn(struct event_context *event_ctx,
 			    struct timed_event *te,
-			    struct timeval now,
+			    struct timeval now_abs,
 			    void *private_data)
 {
 	struct smbldap_state *state = (struct smbldap_state *)private_data;
@@ -1738,12 +1743,13 @@ static void smbldap_idle_fn(struct event_context *event_ctx,
 		return;
 	}
 
-	if ((state->last_use+SMBLDAP_IDLE_TIME) > now.tv_sec) {
+	if ((state->last_use+SMBLDAP_IDLE_TIME) > time_mono(NULL)) {
 		DEBUG(10,("ldap connection not idle...\n"));
 
+		/* this needs to be made monotonic clock aware inside tevent: */
 		state->idle_event = event_add_timed(
 			event_ctx, NULL,
-			timeval_add(&now, SMBLDAP_IDLE_TIME, 0),
+			timeval_add(&now_abs, SMBLDAP_IDLE_TIME, 0),
 			smbldap_idle_fn,
 			private_data);
 		return;