Hoist some privileged code in preparation for future work.

Based on an approach in vmd with mc146818/ns8250.
diff by Rob Pierce <rob -AT- 2keys -DOT- ca>

ok deraadt@

1 files changed, 20 insertions, 19 deletions

diff --git a/usr.sbin/ifstated/ifstated.c b/usr.sbin/ifstated/ifstated.c
index 371c5eec9ba..f67e0d708ae 100644
--- a/usr.sbin/ifstated/ifstated.c
+++ b/usr.sbin/ifstated/ifstated.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: ifstated.c,v 1.42 2017/06/18 12:03:47 benno Exp $	*/
+/*	$OpenBSD: ifstated.c,v 1.43 2017/06/27 20:46:34 benno Exp $	*/
 
 /*
  * Copyright (c) 2004 Marco Pfatschbacher <mpf@openbsd.org>
@@ -36,6 +36,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <signal.h>
+#include <stdint.h>
 #include <syslog.h>
 #include <err.h>
 #include <event.h>
@@ -87,8 +88,9 @@ int
 main(int argc, char *argv[])
 {
 	struct timeval tv;
-	int ch;
+	int ch, rt_fd;
 	int debug = 0;
+	unsigned int rtfilter;
 
 	log_init(1, LOG_DAEMON);	/* log to stderr until daemonized */
 	log_setverbose(1);
@@ -144,12 +146,25 @@ main(int argc, char *argv[])
 	log_init(debug, LOG_DAEMON);
 	log_setverbose(opts & IFSD_OPT_VERBOSE);
 
+	if ((rt_fd = socket(PF_ROUTE, SOCK_RAW, 0)) < 0)
+		err(1, "no routing socket");
+
+	rtfilter = ROUTE_FILTER(RTM_IFINFO);
+	if (setsockopt(rt_fd, PF_ROUTE, ROUTE_MSGFILTER,
+	    &rtfilter, sizeof(rtfilter)) == -1)         /* not fatal */
+		log_warn("%s: setsockopt msgfilter", __func__);
+
+	rtfilter = RTABLE_ANY;
+	if (setsockopt(rt_fd, PF_ROUTE, ROUTE_TABLEFILTER,
+	    &rtfilter, sizeof(rtfilter)) == -1)         /* not fatal */
+		log_warn("%s: setsockopt tablefilter", __func__);
+
 	signal_set(&sigchld_ev, SIGCHLD, sigchld_handler, NULL);
 	signal_add(&sigchld_ev, NULL);
 
 	/* Loading the config needs to happen in the event loop */
 	timerclear(&tv);
-	evtimer_set(&startup_ev, startup_handler, NULL);
+	evtimer_set(&startup_ev, startup_handler, (void *)(long)rt_fd);
 	evtimer_add(&startup_ev, &tv);
 
 	event_loop(0);
@@ -159,28 +174,14 @@ main(int argc, char *argv[])
 void
 startup_handler(int fd, short event, void *arg)
 {
-	int rt_fd;
-	unsigned int rtfilter;
-
-	if ((rt_fd = socket(PF_ROUTE, SOCK_RAW, 0)) < 0)
-		err(1, "no routing socket");
+	int rfd = (int)(long)arg;
 
 	if (load_config() != 0) {
 		log_warnx("unable to load config");
 		exit(1);
 	}
-
-	rtfilter = ROUTE_FILTER(RTM_IFINFO);
-	if (setsockopt(rt_fd, PF_ROUTE, ROUTE_MSGFILTER,
-	    &rtfilter, sizeof(rtfilter)) == -1)         /* not fatal */
-		log_warn("%s: setsockopt msgfilter", __func__);
-
-	rtfilter = RTABLE_ANY;
-	if (setsockopt(rt_fd, PF_ROUTE, ROUTE_TABLEFILTER,
-	    &rtfilter, sizeof(rtfilter)) == -1)         /* not fatal */
-		log_warn("%s: setsockopt tablefilter", __func__);
 	
-	event_set(&rt_msg_ev, rt_fd, EV_READ|EV_PERSIST, rt_msg_handler, NULL);
+	event_set(&rt_msg_ev, rfd, EV_READ|EV_PERSIST, rt_msg_handler, NULL);
 	event_add(&rt_msg_ev, NULL);
 
 	signal_set(&sighup_ev, SIGHUP, sighup_handler, NULL);