INSECURE_ZONES=
USE_FORWARDERS=1
ENABLE_SAFE_SEARCH=off
+FORCE_TCP=off
# Cache any local zones for 60 seconds
LOCAL_TTL=60
# Load optional configuration
[ -e "/etc/sysconfig/unbound" ] && . /etc/sysconfig/unbound
+DIG_ARGS=()
+
+if [ "${FORCE_TCP}" = "on" ]; then
+ DIG_ARGS+=( "+tcp" )
+fi
+
ip_address_revptr() {
local addr=${1}
(
config_header
+ # Force using TCP for upstream servers only
+ if [ "${FORCE_TCP}" = "on" ]; then
+ echo "# Force using TCP for upstream servers only"
+ echo "server:"
+ echo " tcp-upstream: yes"
+ echo
+ fi
+
local insecure_zones="${INSECURE_ZONES}"
local enabled zone server servers remark disable_dnssec rest
local ns=${1}
shift
- dig @${ns} +nodnssec A ${TEST_DOMAIN} $@ >/dev/null
+ dig "${DIG_ARGS[@]}" @${ns} +nodnssec A ${TEST_DOMAIN} $@ >/dev/null
}
# Resolving ${TEST_DOMAIN_FAIL} will fail if the nameserver is validating
local ns=${1}
shift
- if ! dig @${ns} A ${TEST_DOMAIN_FAIL} $@ | grep -q SERVFAIL; then
+ if ! dig "${DIG_ARGS[@]}" @${ns} A ${TEST_DOMAIN_FAIL} $@ | grep -q SERVFAIL; then
return 1
else
# Determine if NS replies with "ad" data flag if DNSSEC enabled
- dig @${ns} +dnssec SOA ${TEST_DOMAIN} $@ | awk -F: '/\;\;\ flags\:/ { s=1; if (/\ ad/) s=0; exit s }'
+ dig "${DIG_ARGS[@]}" @${ns} +dnssec SOA ${TEST_DOMAIN} $@ | awk -F: '/\;\;\ flags\:/ { s=1; if (/\ ad/) s=0; exit s }'
fi
}
local ns=${1}
shift
- dig @${ns} DNSKEY ${TEST_DOMAIN} $@ | grep -qv SOA
+ dig "${DIG_ARGS[@]}" @${ns} DNSKEY ${TEST_DOMAIN} $@ | grep -qv SOA
}
ns_forwards_DS() {
local ns=${1}
shift
- dig @${ns} DS ${TEST_DOMAIN} $@ | grep -qv SOA
+ dig "${DIG_ARGS[@]}" @${ns} DS ${TEST_DOMAIN} $@ | grep -qv SOA
}
ns_forwards_RRSIG() {
local ns=${1}
shift
- dig @${ns} +dnssec A ${TEST_DOMAIN} $@ | grep -q RRSIG
+ dig "${DIG_ARGS[@]}" @${ns} +dnssec A ${TEST_DOMAIN} $@ | grep -q RRSIG
}
ns_supports_tcp() {
local ns=${1}
shift
- dig @${ns} +tcp A ${TEST_DOMAIN} $@ >/dev/null || return 1
+ # If TCP is forced we know by now if the server responds to it
+ if [ "${FORCE_TCP}" = "on" ]; then
+ return 0
+ fi
+
+ dig "${DIG_ARGS[@]}" @${ns} +tcp A ${TEST_DOMAIN} $@ >/dev/null || return 1
}
ns_determine_edns_buffer_size() {
local b
for b in 4096 2048 1500 1480 1464 1400 1280 512; do
- if dig @${ns} +dnssec +bufsize=${b} A ${TEST_DOMAIN} $@ >/dev/null; then
+ if dig "${DIG_ARGS[@]}" @${ns} +dnssec +bufsize=${b} A ${TEST_DOMAIN} $@ >/dev/null; then
echo "${b}"
return 0
fi
can_resolve_root() {
local ns
for ns in $(get_root_nameservers); do
- if dig @${ns} +dnssec SOA . $@ >/dev/null; then
+ if dig "${DIG_ARGS[@]}" @${ns} +dnssec SOA . $@ >/dev/null; then
return 0
fi
done
local ns
for ns in $(read_name_servers); do
local answer
- for answer in $(dig +short "@${ns}" A "${hostname}"); do
+ for answer in $(dig "${DIG_ARGS[@]}" +short "@${ns}" A "${hostname}"); do
found=1
# Filter out non-IP addresses