[src/trunk]: src/usr.sbin/rtadvd rtadvd: Add C flag to control the zeroing of...

[roy <roy%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/165636dbd7c9
branches:  trunk
changeset: 846319:165636dbd7c9
user:      roy <roy%NetBSD.org@localhost>
date:      Mon Nov 11 13:42:49 2019 +0000

description:
rtadvd: Add C flag to control the zeroing of the leaving configuration

This is only intended to assist the testing of clients which consume
Router Advertisement messages, such as dhcpcd(8).

diffstat:

 usr.sbin/rtadvd/config.c |   7 ++++++-
 usr.sbin/rtadvd/rtadvd.8 |  14 ++++++++++----
 usr.sbin/rtadvd/rtadvd.c |   7 +++++--
 usr.sbin/rtadvd/rtadvd.h |   4 +++-
 4 files changed, 24 insertions(+), 8 deletions(-)

diffs (113 lines):

diff -r 2bc09ddb24c9 -r 165636dbd7c9 usr.sbin/rtadvd/config.c
--- a/usr.sbin/rtadvd/config.c  Mon Nov 11 11:06:27 2019 +0000
+++ b/usr.sbin/rtadvd/config.c  Mon Nov 11 13:42:49 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: config.c,v 1.42 2019/11/10 21:32:38 roy Exp $  */
+/*     $NetBSD: config.c,v 1.43 2019/11/11 13:42:49 roy Exp $  */
 /*     $KAME: config.c,v 1.93 2005/10/17 14:40:02 suz Exp $    */
 
 /*
@@ -719,6 +719,11 @@
        TAILQ_FOREACH(rai, &ralist, next) {
                if (rai->ifindex == tmp->ifindex) {
                        TAILQ_REMOVE(&ralist, rai, next);
+                       if (Cflag) {
+                               free_rainfo(rai);
+                               rai = NULL;
+                               break;
+                       }
                        /* If we already have a leaving RA use that
                         * as this config hasn't been advertised */
                        if (rai->leaving) {
diff -r 2bc09ddb24c9 -r 165636dbd7c9 usr.sbin/rtadvd/rtadvd.8
--- a/usr.sbin/rtadvd/rtadvd.8  Mon Nov 11 11:06:27 2019 +0000
+++ b/usr.sbin/rtadvd/rtadvd.8  Mon Nov 11 13:42:49 2019 +0000
@@ -1,4 +1,4 @@
-.\"    $NetBSD: rtadvd.8,v 1.26 2017/11/06 15:15:04 christos Exp $
+.\"    $NetBSD: rtadvd.8,v 1.27 2019/11/11 13:42:49 roy Exp $
 .\"    $KAME: rtadvd.8,v 1.24 2002/05/31 16:16:08 jinmei Exp $
 .\"
 .\" Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
@@ -28,7 +28,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd November 6, 2017
+.Dd November 11, 2019
 .Dt RTADVD 8
 .Os
 .Sh NAME
@@ -36,7 +36,7 @@
 .Nd router advertisement daemon
 .Sh SYNOPSIS
 .Nm
-.Op Fl DdfRs
+.Op Fl CDdfRs
 .Op Fl c Ar configfile
 .Op Fl M Ar ifname
 .Op Fl p Ar pidfile
@@ -112,6 +112,10 @@
 The command line options are:
 .Bl -tag -width indent
 .\"
+.It Fl C
+Don't expire the existing configuration on receipt of SIGHUP.
+This option is only intended to aid the testing of clients that consume
+Router Advertisement messages.
 .It Fl c Ar configfile
 Specify an alternate location,
 .Ar configfile ,
@@ -175,7 +179,9 @@
 .Pa /etc/rtadvd.conf .
 If an invalid parameter is found in the configuration file upon the reload, the
 entry will be ignored and the old configuration will be used.
-When parameters in an existing entry are updated,
+When parameters in an existing entry are updated and the
+.Fl C
+flag is not used,
 .Nm
 will send Router Advertisement messages with the old configuration but zero
 router lifetime to the interface first, and then start to send a new message.
diff -r 2bc09ddb24c9 -r 165636dbd7c9 usr.sbin/rtadvd/rtadvd.c
--- a/usr.sbin/rtadvd/rtadvd.c  Mon Nov 11 11:06:27 2019 +0000
+++ b/usr.sbin/rtadvd/rtadvd.c  Mon Nov 11 13:42:49 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: rtadvd.c,v 1.70 2019/11/10 21:07:39 roy Exp $  */
+/*     $NetBSD: rtadvd.c,v 1.71 2019/11/11 13:42:49 roy Exp $  */
 /*     $KAME: rtadvd.c,v 1.92 2005/10/17 14:40:02 suz Exp $    */
 
 /*
@@ -89,7 +89,7 @@
 int sock;
 int rtsock = -1;
 int accept_rr = 0;
-int dflag = 0, sflag = 0, Dflag;
+int Cflag = 0, dflag = 0, sflag = 0, Dflag;
 
 static char **if_argv;
 static int if_argc;
@@ -194,6 +194,9 @@
                case 'c':
                        conffile = optarg;
                        break;
+               case 'C':
+                       Cflag++;
+                       break;
                case 'd':
                        dflag++;
                        break;
diff -r 2bc09ddb24c9 -r 165636dbd7c9 usr.sbin/rtadvd/rtadvd.h
--- a/usr.sbin/rtadvd/rtadvd.h  Mon Nov 11 11:06:27 2019 +0000
+++ b/usr.sbin/rtadvd/rtadvd.h  Mon Nov 11 13:42:49 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: rtadvd.h,v 1.19 2018/04/20 16:37:17 roy Exp $  */
+/*     $NetBSD: rtadvd.h,v 1.20 2019/11/11 13:42:49 roy Exp $  */
 /*     $KAME: rtadvd.h,v 1.30 2005/10/17 14:40:02 suz Exp $    */
 
 /*
@@ -197,3 +197,5 @@
 int prefix_match(struct in6_addr *, int, struct in6_addr *, int);
 struct rainfo *if_indextorainfo(unsigned int);
 struct prefix *find_prefix(struct rainfo *, struct in6_addr *, int);
+
+extern int Cflag;