git: 99ec65e7fe61 - main - traceroute6(8): Stop probing on networks rejected.

The branch main has been updated by otis:

URL: https://cgit.FreeBSD.org/src/commit/?id=99ec65e7fe61e3148dde543ed7d6566fe589a565

commit 99ec65e7fe61e3148dde543ed7d6566fe589a565
Author:     Juraj Lutter <otis@FreeBSD.org>
AuthorDate: 2024-11-11 22:39:00 +0000
Commit:     Juraj Lutter <otis@FreeBSD.org>
CommitDate: 2025-06-08 15:21:24 +0000

    traceroute6(8): Stop probing on networks rejected.
    
    Stop probing after receiving ICMP6_DST_UNREACH and print
    ICMP6 error code.
    
    The behavior can be observed by tracing the route to,
    for example, 2a02:ee80:4028:1126::
    
    Discussed with:         Job Snijders, Nick Hilliard
    Obtained from:          OpenBSD
    Reviewed by:            markj, jlduran
    Differential Revision:  https://reviews.freebsd.org/D47520
---
 usr.sbin/traceroute6/traceroute6.8 | 6 ++++--
 usr.sbin/traceroute6/traceroute6.c | 4 ++++
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/usr.sbin/traceroute6/traceroute6.8 b/usr.sbin/traceroute6/traceroute6.8
index f185b8087411..406a96a04424 100644
--- a/usr.sbin/traceroute6/traceroute6.8
+++ b/usr.sbin/traceroute6/traceroute6.8
@@ -27,7 +27,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd February 2, 2024
+.Dd November 12, 2024
 .Dt TRACEROUTE6 8
 .Os
 .\"
@@ -75,7 +75,7 @@
 .Sh DESCRIPTION
 The
 .Nm
-utility uses the IPv6 protocol hop limit field to elicit an ICMPv6
+utility uses the IPv6 protocol hop limit field to elicit an ICMP6
 TIME_EXCEEDED response from each gateway along the path to some host.
 .Pp
 The only mandatory parameter is the destination host name or IPv6 address.
@@ -191,6 +191,8 @@ Destination Unreachable - Not a Neighbour.
 Destination Unreachable - Address Unreachable.
 .It !H
 Parameter Problem - Unrecognized Next Header Type.
+.It !<num>
+ICMP6 unreachable code <num>.
 .It !\&
 This is printed if the hop limit is <= 1 on a port unreachable message.
 This means that the packet got to the destination, but that the reply had a hop
diff --git a/usr.sbin/traceroute6/traceroute6.c b/usr.sbin/traceroute6/traceroute6.c
index bfa840b3b1c2..173e97c13bb3 100644
--- a/usr.sbin/traceroute6/traceroute6.c
+++ b/usr.sbin/traceroute6/traceroute6.c
@@ -1009,6 +1009,10 @@ main(int argc, char *argv[])
 								printf(" !");
 							++got_there;
 							break;
+						default:
+							++unreachable;
+							printf(" !<%d>", code & 0xff);
+							break;
 						}
 					} else if (type == ICMP6_PARAM_PROB &&
 					    code == ICMP6_PARAMPROB_NEXTHEADER) {