[4497] Enable retrieved options copying for DHCPv4o6 case.

src/bin/dhcp4/dhcp4to6_ipc.cc

@@ -121,6 +121,9 @@ void Dhcp4to6Ipc::handler() {
             // Delete previously set arguments
             callout_handle->deleteAllArguments();
 
+            // Enable copying options from the packet within hook library.
+            ScopedEnableOptionsCopy<Pkt4> response4_options_copy(rsp);
+
             // Pass incoming packet as argument
             callout_handle->setArgument("response4", rsp);
 

src/bin/dhcp4/tests/dhcp4to6_ipc_unittest.cc

@@ -21,6 +21,7 @@
 
 #include <gtest/gtest.h>
 #include <stdint.h>
+#include <utility>
 
 using namespace isc;
 using namespace isc::asiolink;
@@ -64,6 +65,10 @@ public:
         EXPECT_TRUE(srv);
         // Let's wipe all existing statistics.
         StatsMgr::instance().removeAll();
+
+        // Set the flags to false as we expect them to be set in callouts.
+        callback_recv_pkt_options_copy_ = std::make_pair(false, false);
+        callback_sent_pkt_options_copy_ = std::make_pair(false, false);
     }
 
     /// @brief Configure DHCP4o6 port.
@@ -85,9 +90,17 @@ public:
     ///
     /// @param callout_handle handle passed by the hooks framework
     /// @return always 0
-    static int
-        buffer4_receive_callout(CalloutHandle& callout_handle) {
+    static int buffer4_receive_callout(CalloutHandle& callout_handle) {
         callout_handle.getArgument("query4", callback_recv_pkt_);
+        Pkt4o6Ptr pkt4 = boost::dynamic_pointer_cast<Pkt4o6>(callback_recv_pkt_);
+        if (pkt4) {
+            callback_recv_pkt_options_copy_.first = pkt4->isCopyRetrievedOptions();
+            Pkt6Ptr pkt6 = pkt4->getPkt6();
+            if (pkt6) {
+                callback_recv_pkt_options_copy_.second =
+                    pkt6->isCopyRetrievedOptions();
+            }
+        }
         return (0);
     }
 
@@ -97,9 +110,17 @@ public:
     ///
     /// @param callout_handle handle passed by the hooks framework
     /// @return always 0
-    static int
-        buffer4_send_callout(CalloutHandle& callout_handle) {
+    static int buffer4_send_callout(CalloutHandle& callout_handle) {
         callout_handle.getArgument("response4", callback_sent_pkt_);
+        Pkt4o6Ptr pkt4 = boost::dynamic_pointer_cast<Pkt4o6>(callback_sent_pkt_);
+        if (pkt4) {
+            callback_sent_pkt_options_copy_.first = pkt4->isCopyRetrievedOptions();
+            Pkt6Ptr pkt6 = pkt4->getPkt6();
+            if (pkt6) {
+                callback_sent_pkt_options_copy_.second =
+                    pkt6->isCopyRetrievedOptions();
+            }
+        }
         return (0);
     }
 
@@ -109,6 +130,14 @@ public:
     /// @brief Response Pkt4 shared pointer returned in the send callout
     static Pkt4Ptr callback_sent_pkt_;
 
+    /// Flags indicating if copying retrieved options was enabled for
+    /// a received packet during callout execution.
+    static std::pair<bool, bool> callback_recv_pkt_options_copy_;
+
+    /// Flags indicating if copying retrieved options was enabled for
+    /// a sent packet during callout execution.
+    static std::pair<bool, bool> callback_sent_pkt_options_copy_;
+
     /// @brief reference to a controlled server
     ///
     /// Dhcp4to6Ipc::handler() uses the instance of the controlled server
@@ -124,6 +153,8 @@ private:
 
 Pkt4Ptr Dhcp4to6IpcTest::callback_recv_pkt_;
 Pkt4Ptr Dhcp4to6IpcTest::callback_sent_pkt_;
+std::pair<bool, bool> Dhcp4to6IpcTest::callback_recv_pkt_options_copy_;
+std::pair<bool, bool> Dhcp4to6IpcTest::callback_sent_pkt_options_copy_;
 
 void
 Dhcp4to6IpcTest::configurePort(uint16_t port) {
@@ -192,6 +223,11 @@ TEST_F(Dhcp4to6IpcTest, receive) {
     ASSERT_TRUE(pkt6_received);
     EXPECT_EQ("eth0", pkt6_received->getIface());
     EXPECT_EQ("2001:db8:1::123", pkt6_received->getRemoteAddr().toText());
+
+    // Both DHCP4o6 and encapsulated DHCPv6 packet should have the
+    // flag enabled.
+    EXPECT_TRUE(callback_recv_pkt_options_copy_.first);
+    EXPECT_TRUE(callback_recv_pkt_options_copy_.second);
 }
 
 // This test verifies that message with multiple DHCPv4 query options
@@ -326,6 +362,11 @@ TEST_F(Dhcp4to6IpcTest, process) {
     EXPECT_EQ("eth0", pkt6_sent->getIface());
     EXPECT_EQ("2001:db8:1::123", pkt6_sent->getRemoteAddr().toText());
 
+    // Both DHCP4o6 and encapsulated DHCPv6 packet should have the
+    // flag enabled.
+    EXPECT_TRUE(callback_sent_pkt_options_copy_.first);
+    EXPECT_TRUE(callback_sent_pkt_options_copy_.second);
+
     // Verify the 4o6 part
     OptionCollection sent_msgs = pkt6_sent->getOptions(D6O_DHCPV4_MSG);
     ASSERT_EQ(1, sent_msgs.size());

src/bin/dhcp6/dhcp6to4_ipc.cc

@@ -107,6 +107,9 @@ void Dhcp6to4Ipc::handler() {
             // Delete previously set arguments
             callout_handle->deleteAllArguments();
 
+            // Enable copying options from the packet within hook library.
+            ScopedEnableOptionsCopy<Pkt6> response6_options_copy(pkt);
+
             // Pass incoming packet as argument
             callout_handle->setArgument("response6", pkt);
 

src/bin/dhcp6/tests/dhcp6to4_ipc_unittest.cc

@@ -55,6 +55,9 @@ public:
                         registerCallout("buffer6_send", buffer6_send_callout));
         // Let's wipe all existing statistics.
         StatsMgr::instance().removeAll();
+
+        // Reset the flag which we expect to be set in the callout.
+        callback_pkt_options_copy_ = false;
     }
 
     /// @brief Configure DHCP4o6 port.
@@ -77,12 +80,19 @@ public:
     static int
     buffer6_send_callout(CalloutHandle& callout_handle) {
         callout_handle.getArgument("response6", callback_pkt_);
+        if (callback_pkt_) {
+            callback_pkt_options_copy_ = callback_pkt_->isCopyRetrievedOptions();
+        }
         return (0);
     }
 
     /// @brief Response Pkt6 shared pointer returned in the callout
     static Pkt6Ptr callback_pkt_;
 
+    /// Flag indicating if copying retrieved options was enabled for
+    /// a received packet during callout execution.
+    static bool callback_pkt_options_copy_;
+
 private:
 
     /// @brief Provides fake configuration of interfaces.
@@ -90,6 +100,7 @@ private:
 };
 
 Pkt6Ptr Dhcp6to4IpcTest::callback_pkt_;
+bool Dhcp6to4IpcTest::callback_pkt_options_copy_;
 
 void
 Dhcp6to4IpcTest::configurePort(const uint16_t port) {
@@ -153,6 +164,10 @@ TEST_F(Dhcp6to4IpcTest, receive) {
     ASSERT_NO_THROW(src_ipc.send(pkt));
     ASSERT_NO_THROW(IfaceMgr::instance().receive6(1, 0));
 
+    // Make sure that the received packet was configured to return copy of
+    // retrieved options within a callout.
+    EXPECT_TRUE(callback_pkt_options_copy_);
+
     // Get the forwarded packet from the callout
     Pkt6Ptr forwarded = Dhcp6to4IpcTest::callback_pkt_;
     ASSERT_TRUE(forwarded);