upstream: Prime caches for DNS names needed for tests.

When running the SSHFP tests, particularly on an ephemeral VM, the first
query or two can fail for some reason, presumably because something isn't
fully initialized or something.  To work around this, issue queries for the
names we'll need before we need them.

OpenBSD-Regress-ID: 900841133540e7dead253407db5a874a6ed09eca

diff --git a/regress/sshfp-connect.sh b/regress/sshfp-connect.sh
index f78646922efea07de58cfb95e5703263629e82cb..3c73a35d05dd4e217def8ed34acf33a9600b63ed 100644 (file)
--- a/regress/sshfp-connect.sh
+++ b/regress/sshfp-connect.sh
@@ -1,4 +1,4 @@
-#      $OpenBSD: sshfp-connect.sh,v 1.4 2021/09/01 00:50:27 dtucker Exp $
+#      $OpenBSD: sshfp-connect.sh,v 1.5 2025/03/11 11:46:44 dtucker Exp $
 #      Placed in the Public Domain.
 
 # This test requires external setup and thus is skipped unless
@@ -29,6 +29,12 @@ if ! $SSH -Q key-plain | grep ssh-rsa >/dev/null; then
 elif [ -z "${TEST_SSH_SSHFP_DOMAIN}" ]; then
        skip "TEST_SSH_SSHFP_DOMAIN not set."
 else
+       # Prime any DNS caches and resolvers.
+       for i in sshtest sshtest-sha1 sshtest-sha256; do
+               host -t sshfp ${i}.${TEST_SSH_SSHFP_DOMAIN} >/dev/null 2>&1
+               host -t sshfp ${i}-bad.${TEST_SSH_SSHFP_DOMAIN} >/dev/null 2>&1
+       done
+
        # Set RSA host key to match fingerprints above.
        mv $OBJ/sshd_proxy $OBJ/sshd_proxy.orig
        $SUDO cp $SRC/rsa_openssh.prv $OBJ/host.ssh-rsa