From bbade9b3df20012c2859965bd5030f98edde4565 Mon Sep 17 00:00:00 2001
From: Jun-ichiro itojun Hagino <itojun@cvs.openbsd.org>
Date: Mon, 5 Jan 2004 20:32:51 +0000
Subject: add -F option, which sets sysctl(8) variables rather than warn(3)
 about the current setting.  basically for boot floppy.  req'ed by fries@.
 deraadt@ ok.

---
 usr.sbin/rtsold/if.c     | 18 +++++++++++++++++-
 usr.sbin/rtsold/rtsold.8 | 20 ++++++++++++++++----
 usr.sbin/rtsold/rtsold.c | 27 ++++++++++++++++++---------
 usr.sbin/rtsold/rtsold.h |  3 ++-
 4 files changed, 53 insertions(+), 15 deletions(-)

diff --git a/usr.sbin/rtsold/if.c b/usr.sbin/rtsold/if.c
index 7456c330ed7..b421b488282 100644
--- a/usr.sbin/rtsold/if.c
+++ b/usr.sbin/rtsold/if.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: if.c,v 1.17 2003/10/05 15:29:28 deraadt Exp $	*/
+/*	$OpenBSD: if.c,v 1.18 2004/01/05 20:32:50 itojun Exp $	*/
 /*	$KAME: if.c,v 1.18 2002/05/31 10:10:03 itojun Exp $	*/
 
 /*
@@ -299,6 +299,22 @@ getinet6sysctl(int code)
 		return value;
 }
 
+int
+setinet6sysctl(int code, int newval)
+{
+	int mib[] = { CTL_NET, PF_INET6, IPPROTO_IPV6, 0 };
+	int value;
+	size_t size;
+
+	mib[3] = code;
+	size = sizeof(value);
+	if (sysctl(mib, sizeof(mib)/sizeof(mib[0]), &value, &size,
+	    &newval, sizeof(newval)) < 0)
+		return -1;
+	else
+		return value;
+}
+
 /*------------------------------------------------------------*/
 
 /* get ia6_flags for link-local addr on if.  returns -1 on error. */
diff --git a/usr.sbin/rtsold/rtsold.8 b/usr.sbin/rtsold/rtsold.8
index 97f890b5d35..9395d1772e4 100644
--- a/usr.sbin/rtsold/rtsold.8
+++ b/usr.sbin/rtsold/rtsold.8
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: rtsold.8,v 1.17 2004/01/03 06:20:17 itojun Exp $
+.\"	$OpenBSD: rtsold.8,v 1.18 2004/01/05 20:32:50 itojun Exp $
 .\"	$KAME: rtsold.8,v 1.17 2001/07/09 22:30:37 itojun Exp $
 .\"
 .\" Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
@@ -38,13 +38,13 @@
 .\"
 .Sh SYNOPSIS
 .Nm rtsold
-.Op Fl dDfm1
+.Op Fl dDfFm1
 .Ar interface ...
 .Nm rtsold
-.Op Fl dDfm1
+.Op Fl dDfFm1
 .Fl a
 .Nm rtsol
-.Op Fl dD
+.Op Fl dDF
 .Ar interface ...
 .Nm rtsol
 .Op Fl dD
@@ -156,6 +156,18 @@ from becoming a daemon (foreground mode).
 Warning messages are generated to standard error
 instead of
 .Xr syslog 3 .
+.It Fl F
+Configure
+.Xr sysctl 8
+variable related to
+.Nm
+by itself.
+Without
+.Fl F ,
+.Nm
+will not alter and obey the current
+.Xr sysctl 8
+settings.
 .It Fl m
 Enable mobility support.
 If this option is specified,
diff --git a/usr.sbin/rtsold/rtsold.c b/usr.sbin/rtsold/rtsold.c
index cdb3ab695d2..a6701f9ef44 100644
--- a/usr.sbin/rtsold/rtsold.c
+++ b/usr.sbin/rtsold/rtsold.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: rtsold.c,v 1.34 2004/01/03 06:20:17 itojun Exp $	*/
+/*	$OpenBSD: rtsold.c,v 1.35 2004/01/05 20:32:50 itojun Exp $	*/
 /*	$KAME: rtsold.c,v 1.75 2004/01/03 00:00:07 itojun Exp $	*/
 
 /*
@@ -60,6 +60,7 @@ struct ifinfo *iflist;
 struct timeval tm_max =	{0x7fffffff, 0x7fffffff};
 static int log_upto = 999;
 static int fflag = 0;
+static int Fflag = 0;	/* force setting sysctl parameters */
 
 int aflag = 0;
 int dflag = 0;
@@ -119,9 +120,9 @@ main(int argc, char *argv[])
 	if (argv0 && argv0[strlen(argv0) - 1] != 'd') {
 		fflag = 1;
 		once = 1;
-		opts = "adD";
+		opts = "adDF";
 	} else
-		opts = "adDfm1";
+		opts = "adDfFm1";
 
 	while ((ch = getopt(argc, argv, opts)) != -1) {
 		switch (ch) {
@@ -137,6 +138,9 @@ main(int argc, char *argv[])
 		case 'f':
 			fflag = 1;
 			break;
+		case 'F':
+			Fflag = 1;
+			break;
 		case 'm':
 			mobile_node = 1;
 			break;
@@ -172,12 +176,17 @@ main(int argc, char *argv[])
 			setlogmask(LOG_UPTO(log_upto));
 	}
 
-	/* warn if accept_rtadv is down */
-	if (!getinet6sysctl(IPV6CTL_ACCEPT_RTADV))
-		warnx("kernel is configured not to accept RAs");
-	/* warn if forwarding is up */
-	if (getinet6sysctl(IPV6CTL_FORWARDING))
-		warnx("kernel is configured as a router, not a host");
+	if (Fflag) {
+		setinet6sysctl(IPV6CTL_ACCEPT_RTADV, 1);
+		setinet6sysctl(IPV6CTL_FORWARDING, 0);
+	} else {
+		/* warn if accept_rtadv is down */
+		if (!getinet6sysctl(IPV6CTL_ACCEPT_RTADV))
+			warnx("kernel is configured not to accept RAs");
+		/* warn if forwarding is up */
+		if (getinet6sysctl(IPV6CTL_FORWARDING))
+			warnx("kernel is configured as a router, not a host");
+	}
 
 #ifndef SMALL
 	/* initialization to dump internal status to a file */
diff --git a/usr.sbin/rtsold/rtsold.h b/usr.sbin/rtsold/rtsold.h
index af03c4236a0..95c883b9f8b 100644
--- a/usr.sbin/rtsold/rtsold.h
+++ b/usr.sbin/rtsold/rtsold.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: rtsold.h,v 1.10 2002/05/31 21:24:28 itojun Exp $	*/
+/*	$OpenBSD: rtsold.h,v 1.11 2004/01/05 20:32:50 itojun Exp $	*/
 /*	$KAME: rtsold.h,v 1.14 2002/05/31 10:10:03 itojun Exp $	*/
 
 /*
@@ -77,6 +77,7 @@ extern int lladdropt_length(struct sockaddr_dl *);
 extern void lladdropt_fill(struct sockaddr_dl *, struct nd_opt_hdr *);
 extern struct sockaddr_dl *if_nametosdl(char *);
 extern int getinet6sysctl(int);
+extern int setinet6sysctl(int, int);
 
 /* rtsol.c */
 extern int sockopen(void);
-- 
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