Date: Fri, 26 Jun 2026 14:43:37 +0000 From: Dag-Erling=?utf-8?Q? Sm=C3=B8rg?=rav <des@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: f0a861efbafe - main - local-unbound-setup: Support IPv6-only systems Message-ID: <6a3e9019.1f234.5366f33f@gitrepo.freebsd.org>
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The branch main has been updated by des: URL: https://cgit.FreeBSD.org/src/commit/?id=f0a861efbafeb81428d5e8c23dac9da73fe14007 commit f0a861efbafeb81428d5e8c23dac9da73fe14007 Author: Dag-Erling Smørgrav <des@FreeBSD.org> AuthorDate: 2026-06-26 14:43:26 +0000 Commit: Dag-Erling Smørgrav <des@FreeBSD.org> CommitDate: 2026-06-26 14:43:26 +0000 local-unbound-setup: Support IPv6-only systems * In the server configuration, disable protocols not supported by the kernel. * In resolv.conf, instead of only using 127.0.0.1, use either 127.0.0.1, ::1, or both depending on which protocols the kernel supports. MFC after: 1 week Reviewed by: jlduran Differential Revision: https://reviews.freebsd.org/D57840 --- usr.sbin/unbound/setup/local-unbound-setup.sh | 50 +++++++++++++++++++++------ 1 file changed, 40 insertions(+), 10 deletions(-) diff --git a/usr.sbin/unbound/setup/local-unbound-setup.sh b/usr.sbin/unbound/setup/local-unbound-setup.sh index ec3aeb673ecc..6b217ec574cd 100755 --- a/usr.sbin/unbound/setup/local-unbound-setup.sh +++ b/usr.sbin/unbound/setup/local-unbound-setup.sh @@ -72,6 +72,19 @@ RE_forward_addr="((${RE_ipv4}|${RE_ipv6})(@${RE_port})?)" RE_forward_name="(${RE_dnsname}(@${RE_port})?)" RE_forward_tls="(${RE_forward_addr}(#${RE_dnsname})?)" +# +# Check if a kernel feature is available +# +has_feature() { + local name=$1 v + eval "v=\$kern_features_${name}" + if [ -z "$v" ] ; then + v="$(sysctl -qn "kern.features.${name}")" + eval "kern_features_${name}=$((v))" + fi + return $((!v)) +} + # # Set default values for unset configuration variables. # @@ -136,13 +149,12 @@ get_nameservers() { # # Scan through /etc/resolv.conf looking for uncommented nameserver -# lines. Comment out any that don't point to localhost. Finally, -# append a nameserver line that points to localhost, if there wasn't -# one already, and enable the edns0 option. +# lines and comment out any that don't point to localhost. Finally, +# append the correct nameserver lines and enable the edns0 option. # gen_resolv_conf() { - local localhost=no - local edns0=no + local localhost4=false localhost6=false + local edns0=false while read line ; do local bareline=${line%%\#*} local key=${bareline%%[[:space:]]*} @@ -150,8 +162,17 @@ gen_resolv_conf() { case ${key} in nameserver) case ${value} in - 127.0.0.1|::1|localhost|localhost.*) - localhost=yes + 127.0.0.1) + localhost4=true + if ! has_feature inet ; then + continue + fi + ;; + ::1) + localhost6=true + if ! has_feature inet6 ; then + continue + fi ;; *) echo -n "# " @@ -161,17 +182,20 @@ gen_resolv_conf() { options) case ${value} in *edns0*) - edns0=yes + edns0=true ;; esac ;; esac echo "${line}" done - if [ "${localhost}" = "no" ] ; then + if ! $localhost4 && has_feature inet ; then echo "nameserver 127.0.0.1" fi - if [ "${edns0}" = "no" ] ; then + if ! $localhost6 && has_feature inet6 ; then + echo "nameserver ::1" + fi + if ! $edns0 ; then echo "options edns0" fi } @@ -261,6 +285,12 @@ gen_unbound_conf() { if [ "${use_tls}" = "yes" ] ; then echo " tls-cert-bundle: /etc/ssl/cert.pem" fi + if ! has_feature inet ; then + echo " do-ip4: no" + fi + if ! has_feature inet6 ; then + echo " do-ip6: no" + fi echo " so-sndbuf: 0" echo "" if [ -f "${forward_conf}" ] ; thenhome | help
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