router/functions: fix EXTRA_DNS checks returning false when unset

Same issue as vlog() — [ -n "$EXTRA_DNS" ] && cmd returns exit code 1 when EXTRA_DNS is empty, which can affect callers. Add || true to all four occurrences. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

router/functions: fix EXTRA_DNS checks returning false when unset
3f77cee1 · Vitaly Lipatov · da851e47 · 3f77cee1
Commit 3f77cee1 authored Feb 19, 2026 by Vitaly Lipatov
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functions router/functions +4 -4

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--- a/router/functions
+++ b/router/functions
@@ -61,14 +61,14 @@ get_ipv4_list()
 {
    echo "$1" | grep -q "[a-z]" || return 0
    dig "$1" A | grep -v "^;" | grep "IN[[:space:]]*A[[:space:]]" | sed -e "s|.*[[:space:]]||" | sort
-    [ -n "$EXTRA_DNS" ] && dig @$EXTRA_DNS "$1" A | grep -v "^;" | grep "IN[[:space:]]*A[[:space:]]" | sed -e "s|.*[[:space:]]||" | sort
+    [ -n "$EXTRA_DNS" ] && dig @$EXTRA_DNS "$1" A | grep -v "^;" | grep "IN[[:space:]]*A[[:space:]]" | sed -e "s|.*[[:space:]]||" | sort || true
 }

 get_ipv6_list()
 {
    echo "$1" | grep -q "[a-z]" || return 0
    dig "$1" AAAA | grep -v "^;" | grep "IN[[:space:]]*AAAA[[:space:]]" | sed -e "s|.*[[:space:]]||" | sort
-    [ -n "$EXTRA_DNS" ] && dig @$EXTRA_DNS "$1" AAAA | grep -v "^;" | grep "IN[[:space:]]*AAAA[[:space:]]" | sed -e "s|.*[[:space:]]||" | sort
+    [ -n "$EXTRA_DNS" ] && dig @$EXTRA_DNS "$1" AAAA | grep -v "^;" | grep "IN[[:space:]]*AAAA[[:space:]]" | sed -e "s|.*[[:space:]]||" | sort || true
 }

 is_ipv4()
@@ -139,7 +139,7 @@ get_ipv4_list_bulk()
    # Bulk async resolve: local resolver + Google DNS (if reachable)
    {
        adnshost -a -t a -Fi -f < "$domains"
-        [ -n "$EXTRA_DNS" ] && adnshost -a -t a -Fi -f --config "nameserver $EXTRA_DNS" < "$domains"
+        [ -n "$EXTRA_DNS" ] && adnshost -a -t a -Fi -f --config "nameserver $EXTRA_DNS" < "$domains" || true
    } > "$adns_out" 2>/dev/null

    # Output resolved IPs grouped by domain
@@ -182,7 +182,7 @@ get_ipv6_list_bulk()
    # Bulk async resolve: local resolver + Google DNS (if reachable)
    {
        adnshost -a -t aaaa -Fi -f < "$domains"
-        [ -n "$EXTRA_DNS" ] && adnshost -a -t aaaa -Fi -f --config "nameserver $EXTRA_DNS" < "$domains"
+        [ -n "$EXTRA_DNS" ] && adnshost -a -t aaaa -Fi -f --config "nameserver $EXTRA_DNS" < "$domains" || true
    } > "$adns_out" 2>/dev/null

    # Output resolved IPs grouped by domain