dns intercept: port DNS-less network recovery to master

Port !997 from v1.0 onto the context-aware master recovery lifecycle. Preserve master logging and resolver APIs while adding macOS default-route DHCP detection, temporary DNS-target cleanup, and atomic recovery ownership. Includes parser, lifecycle, failure, and concurrency regressions plus the corrected macOS QA helper. Relates to #533 and #597.
2026-09-04 13:36:35 +02:00 · 2026-09-02 16:54:35 +07:00
parent f96868c266
commit 80d1acdfd5
19 changed files with 1386 additions and 352 deletions
@@ -0,0 +1,53 @@
+#!/bin/sh
+set -eu
+
+iface=$(/sbin/route -n get default 2>/dev/null | /usr/bin/awk '/interface:/{print $2; exit}')
+
+printf 'default_interface=%s\n' "$iface"
+
+printf 'ipv4_address='
+/usr/sbin/ipconfig getifaddr "$iface" 2>/dev/null || printf '<none>\n'
+
+printf 'dhcp_ipv4_dns='
+/usr/sbin/ipconfig getoption "$iface" domain_name_server 2>/dev/null |
+    /usr/bin/awk '
+        {
+            for (i = 1; i <= NF; i++) {
+                value = $i
+                gsub(/[{},;]/, "", value)
+                if (value ~ /^([0-9]{1,3}\.){3}[0-9]{1,3}$/ && !seen[value]++) {
+                    if (found) {
+                        printf ","
+                    }
+                    printf "%s", value
+                    found = 1
+                }
+            }
+        }
+        END {
+            if (!found) {
+                printf "<none>"
+            }
+            printf "\n"
+        }
+    '
+
+printf 'effective_ipv4_dns='
+/usr/sbin/scutil --dns |
+    /usr/bin/awk '
+        /nameserver\[[0-9]+\] : [0-9]+\./ {
+            if (!seen[$3]++) {
+                if (found) {
+                    printf ","
+                }
+                printf "%s", $3
+                found = 1
+            }
+        }
+        END {
+            if (!found) {
+                printf "<none>"
+            }
+            printf "\n"
+        }
+    '