commit 1c086e5dfffda7aed9e09c78129553fe7866aada
author Maciej Żenczykowski <maze@google.com> Fri Mar 29 23:13:49 2019 -0700
committer Maciej Żenczykowski <maze@google.com> Tue Apr 02 13:30:43 2019 -0700
tree 951d202d3cc341d0623de671601a0038000c4aa4
parent a615c8df64b38599f34cd46cccb09e0539aacc11

ClatdController - populate ebpf ingress clat map on start and stop

and also attach/detach tc clsact egress qdisc and filter.

Test: atest netd_unit_test netd_integration_test
Bug: 65674744
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I865403ae320b95cec59659b34a69a4f304e1f082

server/ClatdController.h

diff --git a/server/ClatdController.h b/server/ClatdController.h
index cd5ad14..ceebde6 100644
--- a/server/ClatdController.h
+++ b/server/ClatdController.h
@@ -28,6 +28,8 @@
 
 #include "Fwmark.h"
 #include "NetdConstants.h"
+#include "bpf/BpfMap.h"
+#include "netdbpf/bpf_shared.h"
 #include "netdutils/DumpWriter.h"
 
 namespace android {
@@ -40,6 +42,8 @@
     explicit ClatdController(NetworkController* controller);
     virtual ~ClatdController();
 
+    void Init(void);
+
     int startClatd(const std::string& interface, const std::string& nat64Prefix,
                    std::string* v6Addr);
     int stopClatd(const std::string& interface);
@@ -80,6 +84,18 @@
                                    in6_addr* v6);
     static void makeChecksumNeutral(in6_addr* v6, const in_addr v4, const in6_addr& nat64Prefix);
 
+    enum eClatEbpfMode {
+        ClatEbpfDisabled,  //  <4.9 kernel ||  <P api shipping level -- will not work
+        ClatEbpfMaybe,     // >=4.9 kernel &&   P api shipping level -- might work
+        ClatEbpfEnabled,   // >=4.9 kernel && >=Q api shipping level -- must work
+    };
+    eClatEbpfMode mClatEbpfMode;
+    base::unique_fd mNetlinkFd;
+    bpf::BpfMap<ClatIngressKey, ClatIngressValue> mClatIngressMap;
+
+    void maybeStartBpf(const ClatdTracker& tracker);
+    void maybeStopBpf(const ClatdTracker& tracker);
+
     // For testing.
     friend class ClatdControllerTest;