Update build.func

misc/build.func

@@ -2372,47 +2372,43 @@ EOF
   if [ "$var_os" != "alpine" ]; then
     msg_info "Waiting for network in LXC container"
     sleep 2
+
     for i in {1..10}; do
-      # 1. Primary check: ICMP ping (fastest, but may be blocked by ISP/firewall)
-      if pct exec "$CTID" -- ping -c1 -W1 deb.debian.org >/dev/null 2>&1; then
-        msg_ok "Network in LXC is reachable (ping)"
-        break
+      # --- Check 1: Has CT an IP? ---
+      ip_in_lxc=$(pct exec "$CTID" -- ip -4 addr show dev eth0 | awk '/inet / {print $2}' | cut -d/ -f1)
+      if [ -z "$ip_in_lxc" ]; then
+        msg_warn "No IP in LXC yet (try $i/10) – waiting..."
+        sleep 3
+        continue
       fi
-      # Wait and retry if not reachable yet
-      if [ "$i" -lt 10 ]; then
-        if [ "$i" -le 3 ]; then
-          sleep 2
-        else
-          msg_warn "No network in LXC yet (try $i/10) – waiting..."
-          sleep 3
-        fi
-      else
-        # After 10 unsuccessful ping attempts, try HTTP connectivity via wget as fallback
-        msg_warn "Ping failed 10 times. Trying HTTP connectivity check (wget) as fallback..."
-        if pct exec "$CTID" -- wget -q --spider http://deb.debian.org; then
-          msg_ok "Network in LXC is reachable (wget fallback)"
-        else
-          msg_error "No network in LXC after all checks."
-          read -r -p "Set fallback DNS (1.1.1.1/8.8.8.8)? [y/N]: " choice
-          case "$choice" in
-          [yY]*)
-            pct set "$CTID" --nameserver 1.1.1.1
-            pct set "$CTID" --nameserver 8.8.8.8
-            # Final attempt with wget after DNS change
-            if pct exec "$CTID" -- wget -q --spider http://deb.debian.org; then
-              msg_ok "Network reachable after DNS fallback"
-            else
-              msg_error "Still no network/DNS in LXC! Aborting customization."
-              exit_script
-            fi
-            ;;
-          *)
-            msg_error "Aborted by user – no DNS fallback set."
-            exit_script
-            ;;
-          esac
-        fi
+
+      # --- Check 2: Can reach gateway? ---
+      if ! pct exec "$CTID" -- ping -c1 -W1 "$GATEWAY" >/dev/null 2>&1; then
+        msg_warn "CT $CTID has IP $ip_in_lxc but cannot reach gateway $GATEWAY (try $i/10)"
+        sleep 3
+        continue
+      fi
+
+      # --- Check 3: Can resolve DNS? ---
+      if pct exec "$CTID" -- getent hosts deb.debian.org >/dev/null 2>&1; then
+        msg_ok "Network in LXC is reachable (DNS OK, IP $ip_in_lxc)"
         break
+      else
+        msg_warn "CT $CTID has IP $ip_in_lxc, gateway OK, but DNS failed (try $i/10)"
+        sleep 3
+      fi
+
+      # --- End of loop fallback ---
+      if [ "$i" -eq 10 ]; then
+        msg_warn "DNS still failing after 10 attempts. Applying fallback resolv.conf..."
+        pct exec "$CTID" -- bash -c 'echo "nameserver 1.1.1.1" > /etc/resolv.conf && echo "nameserver 8.8.8.8" >> /etc/resolv.conf'
+
+        if pct exec "$CTID" -- getent hosts deb.debian.org >/dev/null 2>&1; then
+          msg_ok "Network reachable after DNS fallback"
+        else
+          msg_error "Still no DNS/network in LXC! Aborting customization."
+          exit_script
+        fi
       fi
     done
   fi