Mark V6 link-local sockets correctly

The fwmark.netId of the link-local sockets is wrong. FwmarkServer
uses the current default network on connect() if no network is
specified, which can be mobile data or wifi. Netd would incorrectly
destroy link-local sockets when the default network's permission is
changed, since the socket destroy relies on the fwmark.netId.

This change remarks the V6 link-local sockets on connect() based on the
scope id of the destination address.

Bug: 291128241
Test: atest netd_integration_test:NetdBinderTest#V6LinkLocalFwmark
Test: Manually test backup and restore with following steps on the
source devie.
      1. Run backup and restore with mobile data + wifi.
      2. B&R will disconnect device from wifi AP to get full speed.
      3. Plays videos on Youtube when data is copying.
      4. Screen off for a while.
      5. Screen on, the wifi is automatically connected.
      6. Wait 30s and the mobile data permission will be changed.
      7. Wait for the data copy to completed.

Change-Id: Ia461c669bdbfaebd5a1ae2e84e23c0c6cea75297

1 files changed, 1 insertions, 1 deletions

diff --git a/include/FwmarkCommand.h b/include/FwmarkCommand.h
index 0ff2d2c8..73f98e11 100644
--- a/include/FwmarkCommand.h
+++ b/include/FwmarkCommand.h
@@ -29,7 +29,7 @@ struct FwmarkConnectInfo {
         sockaddr s;
         sockaddr_in sin;
         sockaddr_in6 sin6;
-    } addr;
+    } addr = {};
 
     FwmarkConnectInfo() : error(0), latencyMs(0) {}