diff --git a/include/openthread-coap.h b/include/openthread-coap.h
index 1754eea0e..a06ae3b9a 100644
--- a/include/openthread-coap.h
+++ b/include/openthread-coap.h
@@ -129,10 +129,11 @@ typedef struct otCoapHeader
 /**
  * This function pointer is called when a CoAP response is received or on the request timeout.
  *
- * @param[in]  aContext  A pointer to application-specific context.
- * @param[in[  aHeader   A pointer to the received CoAP header. NULL if no response was received.
- * @param[in]  aMessage  A pointer to the message buffer containing the response. NULL if no response was received.
- * @param[in]  aResult   A result of the CoAP transaction.
+ * @param[in]  aContext      A pointer to application-specific context.
+ * @param[in[  aHeader       A pointer to the received CoAP header. NULL if no response was received.
+ * @param[in]  aMessage      A pointer to the message buffer containing the response. NULL if no response was received.
+ * @param[in]  aMessageInfo  A pointer to the message info for @p aMessage. NULL if no response was received.
+ * @param[in]  aResult       A result of the CoAP transaction.
  *
  * @retval  kThreadError_None             A response was received successfully.
  * @retval  kThreadError_Abort            A CoAP transaction was reseted by peer.
@@ -140,7 +141,7 @@ typedef struct otCoapHeader
  *
  */
 typedef void (*otCoapResponseHandler)(void *aContext, otCoapHeader *aHeader, otMessage aMessage,
-                                      ThreadError aResult);
+                                      const otMessageInfo *aMessageInfo, ThreadError aResult);
 
 /**
  * This function pointer is called when a CoAP request with a given Uri-Path is received.
diff --git a/src/core/coap/coap_client.cpp b/src/core/coap/coap_client.cpp
index 468706902..a23c44f19 100644
--- a/src/core/coap/coap_client.cpp
+++ b/src/core/coap/coap_client.cpp
@@ -71,7 +71,7 @@ ThreadError Client::Stop(void)
         message = message->GetNext();
 
         requestMetadata.ReadFrom(*messageToRemove);
-        FinalizeCoapTransaction(*messageToRemove, requestMetadata, NULL, NULL, kThreadError_Abort);
+        FinalizeCoapTransaction(*messageToRemove, requestMetadata, NULL, NULL, NULL, kThreadError_Abort);
     }
 
     return CoapBase::Stop();
@@ -286,7 +286,7 @@ void Client::HandleRetransmissionTimer(void)
         else
         {
             // No expected response or acknowledgment.
-            FinalizeCoapTransaction(*message, requestMetadata, NULL, NULL, kThreadError_ResponseTimeout);
+            FinalizeCoapTransaction(*message, requestMetadata, NULL, NULL, NULL, kThreadError_ResponseTimeout);
         }
 
         message = nextMessage;
@@ -343,14 +343,15 @@ exit:
 }
 
 void Client::FinalizeCoapTransaction(Message &aRequest, const RequestMetadata &aRequestMetadata,
-                                     Header *aResponseHeader, Message *aResponse, ThreadError aResult)
+                                     Header *aResponseHeader, Message *aResponse,
+                                     const Ip6::MessageInfo *aMessageInfo, ThreadError aResult)
 {
     DequeueMessage(aRequest);
 
     if (aRequestMetadata.mResponseHandler != NULL)
     {
         aRequestMetadata.mResponseHandler(aRequestMetadata.mResponseContext, aResponseHeader,
-                                          aResponse, aResult);
+                                          aResponse, aMessageInfo, aResult);
     }
 }
 
@@ -377,7 +378,7 @@ void Client::ProcessReceivedMessage(Message &aMessage, const Ip6::MessageInfo &a
     case kCoapTypeReset:
         if (responseHeader.IsEmpty())
         {
-            FinalizeCoapTransaction(*message, requestMetadata, NULL, NULL, kThreadError_Abort);
+            FinalizeCoapTransaction(*message, requestMetadata, NULL, NULL, NULL, kThreadError_Abort);
         }
 
         // Silently ignore non-empty reset messages (RFC 7252, p. 4.2).
@@ -402,7 +403,7 @@ void Client::ProcessReceivedMessage(Message &aMessage, const Ip6::MessageInfo &a
         else if (responseHeader.IsResponse() && responseHeader.IsTokenEqual(requestHeader))
         {
             // Piggybacked response.
-            FinalizeCoapTransaction(*message, requestMetadata, &responseHeader, &aMessage, kThreadError_None);
+            FinalizeCoapTransaction(*message, requestMetadata, &responseHeader, &aMessage, &aMessageInfo, kThreadError_None);
         }
 
         // Silently ignore acknowledgments carrying requests (RFC 7252, p. 4.2)
@@ -417,7 +418,7 @@ void Client::ProcessReceivedMessage(Message &aMessage, const Ip6::MessageInfo &a
             SendEmptyAck(aMessageInfo.GetPeerAddr(), aMessageInfo.GetPeerPort(), responseHeader.GetMessageId());
         }
 
-        FinalizeCoapTransaction(*message, requestMetadata, &responseHeader, &aMessage, kThreadError_None);
+        FinalizeCoapTransaction(*message, requestMetadata, &responseHeader, &aMessage, &aMessageInfo, kThreadError_None);
 
         break;
     }
diff --git a/src/core/coap/coap_client.hpp b/src/core/coap/coap_client.hpp
index d42023583..4f5af9e65 100644
--- a/src/core/coap/coap_client.hpp
+++ b/src/core/coap/coap_client.hpp
@@ -250,8 +250,8 @@ private:
     void DequeueMessage(Message &aMessage);
     Message *FindRelatedRequest(const Header &aResponseHeader, const Ip6::MessageInfo &aMessageInfo,
                                 Header &aRequestHeader, RequestMetadata &aRequestMetadata);
-    void FinalizeCoapTransaction(Message &aRequest, const RequestMetadata &aRequestMetadata,
-                                 Header *aResponseHeader, Message *aResponse, ThreadError aResult);
+    void FinalizeCoapTransaction(Message &aRequest, const RequestMetadata &aRequestMetadata, Header *aResponseHeader,
+                                 Message *aResponse, const Ip6::MessageInfo *aMessageInfo, ThreadError aResult);
 
     ThreadError SendCopy(const Message &aMessage, const Ip6::MessageInfo &aMessageInfo);
     void SendEmptyMessage(const Ip6::Address &aAddress, uint16_t aPort, uint16_t aMessageId, Header::Type aType);
diff --git a/src/core/meshcop/commissioner.cpp b/src/core/meshcop/commissioner.cpp
index 41d78b0c4..1d21e040f 100644
--- a/src/core/meshcop/commissioner.cpp
+++ b/src/core/meshcop/commissioner.cpp
@@ -357,15 +357,18 @@ exit:
 }
 
 void Commissioner::HandleMgmtCommissionerGetResponse(void *aContext, otCoapHeader *aHeader, otMessage aMessage,
-                                                     ThreadError aResult)
+                                                     const otMessageInfo *aMessageInfo, ThreadError aResult)
 {
     static_cast<Commissioner *>(aContext)->HandleMgmtCommissisonerGetResponse(
-        static_cast<Coap::Header *>(aHeader), static_cast<Message *>(aMessage), aResult);
+        static_cast<Coap::Header *>(aHeader), static_cast<Message *>(aMessage),
+        static_cast<const Ip6::MessageInfo *>(aMessageInfo), aResult);
 }
 
-void Commissioner::HandleMgmtCommissisonerGetResponse(Coap::Header *aHeader, Message *aMessage, ThreadError aResult)
+void Commissioner::HandleMgmtCommissisonerGetResponse(Coap::Header *aHeader, Message *aMessage,
+                                                      const Ip6::MessageInfo *aMessageInfo, ThreadError aResult)
 {
     (void) aMessage;
+    (void) aMessageInfo;
 
     otLogFuncEntry();
 
@@ -450,15 +453,18 @@ exit:
 }
 
 void Commissioner::HandleMgmtCommissionerSetResponse(void *aContext, otCoapHeader *aHeader, otMessage aMessage,
-                                                     ThreadError aResult)
+                                                     const otMessageInfo *aMessageInfo, ThreadError aResult)
 {
     static_cast<Commissioner *>(aContext)->HandleMgmtCommissisonerSetResponse(
-        static_cast<Coap::Header *>(aHeader), static_cast<Message *>(aMessage), aResult);
+        static_cast<Coap::Header *>(aHeader), static_cast<Message *>(aMessage),
+        static_cast<const Ip6::MessageInfo *>(aMessageInfo), aResult);
 }
 
-void Commissioner::HandleMgmtCommissisonerSetResponse(Coap::Header *aHeader, Message *aMessage, ThreadError aResult)
+void Commissioner::HandleMgmtCommissisonerSetResponse(Coap::Header *aHeader, Message *aMessage,
+                                                      const Ip6::MessageInfo *aMessageInfo, ThreadError aResult)
 {
     (void) aMessage;
+    (void) aMessageInfo;
 
     otLogFuncEntry();
 
@@ -511,15 +517,19 @@ exit:
 }
 
 void Commissioner::HandleLeaderPetitionResponse(void *aContext, otCoapHeader *aHeader, otMessage aMessage,
-                                                ThreadError aResult)
+                                                const otMessageInfo *aMessageInfo, ThreadError aResult)
 {
     static_cast<Commissioner *>(aContext)->HandleLeaderPetitionResponse(
-        static_cast<Coap::Header *>(aHeader), static_cast<Message *>(aMessage), aResult);
+        static_cast<Coap::Header *>(aHeader), static_cast<Message *>(aMessage),
+        static_cast<const Ip6::MessageInfo *>(aMessageInfo), aResult);
 
 }
 
-void Commissioner::HandleLeaderPetitionResponse(Coap::Header *aHeader, Message *aMessage, ThreadError aResult)
+void Commissioner::HandleLeaderPetitionResponse(Coap::Header *aHeader, Message *aMessage,
+                                                const Ip6::MessageInfo *aMessageInfo, ThreadError aResult)
 {
+    (void) aMessageInfo;
+
     StateTlv state;
     CommissionerSessionIdTlv sessionId;
     bool retransmit = false;
@@ -607,14 +617,18 @@ exit:
 }
 
 void Commissioner::HandleLeaderKeepAliveResponse(void *aContext, otCoapHeader *aHeader, otMessage aMessage,
-                                                 ThreadError aResult)
+                                                 const otMessageInfo *aMessageInfo, ThreadError aResult)
 {
     static_cast<Commissioner *>(aContext)->HandleLeaderKeepAliveResponse(
-        static_cast<Coap::Header *>(aHeader), static_cast<Message *>(aMessage), aResult);
+        static_cast<Coap::Header *>(aHeader), static_cast<Message *>(aMessage),
+        static_cast<const Ip6::MessageInfo *>(aMessageInfo), aResult);
 }
 
-void Commissioner::HandleLeaderKeepAliveResponse(Coap::Header *aHeader, Message *aMessage, ThreadError aResult)
+void Commissioner::HandleLeaderKeepAliveResponse(Coap::Header *aHeader, Message *aMessage,
+                                                 const Ip6::MessageInfo *aMessageInfo, ThreadError aResult)
 {
+    (void) aMessageInfo;
+
     StateTlv state;
 
     otLogFuncEntry();
diff --git a/src/core/meshcop/commissioner.hpp b/src/core/meshcop/commissioner.hpp
index 5bfc00141..e1589a279 100644
--- a/src/core/meshcop/commissioner.hpp
+++ b/src/core/meshcop/commissioner.hpp
@@ -190,18 +190,22 @@ private:
     static void HandleTimer(void *aContext);
     void HandleTimer(void);
 
-    static void HandleMgmtCommissionerSetResponse(void *aContext, otCoapHeader *aHeader,
-                                                  otMessage aMessage, ThreadError aResult);
-    void HandleMgmtCommissisonerSetResponse(Coap::Header *aHeader, Message *aMessage, ThreadError aResult);
-    static void HandleMgmtCommissionerGetResponse(void *aContext, otCoapHeader *aHeader,
-                                                  otMessage aMessage, ThreadError aResult);
-    void HandleMgmtCommissisonerGetResponse(Coap::Header *aHeader, Message *aMessage, ThreadError aResult);
-    static void HandleLeaderPetitionResponse(void *aContext, otCoapHeader *aHeader,
-                                             otMessage aMessage, ThreadError aResult);
-    void HandleLeaderPetitionResponse(Coap::Header *aHeader, Message *aMessage, ThreadError aResult);
-    static void HandleLeaderKeepAliveResponse(void *aContext, otCoapHeader *aHeader,
-                                              otMessage aMessage, ThreadError aResult);
-    void HandleLeaderKeepAliveResponse(Coap::Header *aHeader, Message *aMessage, ThreadError aResult);
+    static void HandleMgmtCommissionerSetResponse(void *aContext, otCoapHeader *aHeader, otMessage aMessage,
+                                                  const otMessageInfo *aMessageInfo, ThreadError aResult);
+    void HandleMgmtCommissisonerSetResponse(Coap::Header *aHeader, Message *aMessage,
+                                            const Ip6::MessageInfo *aMessageInfo, ThreadError aResult);
+    static void HandleMgmtCommissionerGetResponse(void *aContext, otCoapHeader *aHeader, otMessage aMessage,
+                                                  const otMessageInfo *aMessageInfo, ThreadError aResult);
+    void HandleMgmtCommissisonerGetResponse(Coap::Header *aHeader, Message *aMessage,
+                                            const Ip6::MessageInfo *aMessageInfo, ThreadError aResult);
+    static void HandleLeaderPetitionResponse(void *aContext, otCoapHeader *aHeader, otMessage aMessage,
+                                             const otMessageInfo *aMessageInfo, ThreadError aResult);
+    void HandleLeaderPetitionResponse(Coap::Header *aHeader, Message *aMessage,
+                                      const Ip6::MessageInfo *aMessageInfo, ThreadError aResult);
+    static void HandleLeaderKeepAliveResponse(void *aContext, otCoapHeader *aHeader, otMessage aMessage,
+                                              const otMessageInfo *aMessageInfo, ThreadError aResult);
+    void HandleLeaderKeepAliveResponse(Coap::Header *aHeader, Message *aMessage,
+                                       const Ip6::MessageInfo *aMessageInfo, ThreadError aResult);
 
     static void HandleRelayReceive(void *aContext, otCoapHeader *aHeader, otMessage aMessage,
                                    const otMessageInfo *aMessageInfo);
diff --git a/src/core/meshcop/joiner.cpp b/src/core/meshcop/joiner.cpp
index 7a4a646dd..0e384d22a 100644
--- a/src/core/meshcop/joiner.cpp
+++ b/src/core/meshcop/joiner.cpp
@@ -231,20 +231,23 @@ exit:
     otLogFuncExit();
 }
 
-void Joiner::HandleJoinerFinalizeResponse(void *aContext, otCoapHeader *aHeader,
-                                          otMessage aMessage, ThreadError result)
+void Joiner::HandleJoinerFinalizeResponse(void *aContext, otCoapHeader *aHeader, otMessage aMessage,
+                                          const otMessageInfo *aMessageInfo, ThreadError aResult)
 {
     static_cast<Joiner *>(aContext)->HandleJoinerFinalizeResponse(
-        static_cast<Coap::Header *>(aHeader), static_cast<Message *>(aMessage), result);
+        static_cast<Coap::Header *>(aHeader), static_cast<Message *>(aMessage),
+        static_cast<const Ip6::MessageInfo *>(aMessageInfo), aResult);
 }
 
-void Joiner::HandleJoinerFinalizeResponse(Coap::Header *aHeader, Message *aMessage, ThreadError result)
+void Joiner::HandleJoinerFinalizeResponse(Coap::Header *aHeader, Message *aMessage,
+                                          const Ip6::MessageInfo *aMessageInfo, ThreadError aResult)
 {
+    (void) aMessageInfo;
     StateTlv state;
 
     otLogFuncEntry();
 
-    VerifyOrExit(result == kThreadError_None &&
+    VerifyOrExit(aResult == kThreadError_None &&
                  aHeader->GetType() == kCoapTypeAcknowledgment &&
                  aHeader->GetCode() == kCoapResponseChanged, ;);
 
diff --git a/src/core/meshcop/joiner.hpp b/src/core/meshcop/joiner.hpp
index 535e6cce3..642e6a906 100644
--- a/src/core/meshcop/joiner.hpp
+++ b/src/core/meshcop/joiner.hpp
@@ -97,9 +97,10 @@ private:
     static void HandleSecureCoapClientConnect(void *aContext);
 
     void SendJoinerFinalize(void);
-    static void HandleJoinerFinalizeResponse(void *aContext, otCoapHeader *aHeader,
-                                             otMessage aMessage, ThreadError result);
-    void HandleJoinerFinalizeResponse(Coap::Header *aHeader, Message *aMessage, ThreadError result);
+    static void HandleJoinerFinalizeResponse(void *aContext, otCoapHeader *aHeader, otMessage aMessage,
+                                             const otMessageInfo *aMessageInfo, ThreadError aResult);
+    void HandleJoinerFinalizeResponse(Coap::Header *aHeader, Message *aMessage,
+                                      const Ip6::MessageInfo *aMessageInfo, ThreadError aResult);
 
     static void HandleJoinerEntrust(void *aContext, otCoapHeader *aHeader, otMessage aMessage,
                                     const otMessageInfo *aMessageInfo);
diff --git a/src/core/thread/mle_router.cpp b/src/core/thread/mle_router.cpp
index 5631af225..bda6020e7 100644
--- a/src/core/thread/mle_router.cpp
+++ b/src/core/thread/mle_router.cpp
@@ -3667,15 +3667,19 @@ exit:
 }
 
 void MleRouter::HandleAddressSolicitResponse(void *aContext, otCoapHeader *aHeader, otMessage aMessage,
-                                             ThreadError result)
+                                             const otMessageInfo *aMessageInfo, ThreadError aResult)
 {
     static_cast<MleRouter *>(aContext)->HandleAddressSolicitResponse(static_cast<Coap::Header *>(aHeader),
-                                                                     static_cast<Message *>(aMessage), result);
+                                                                     static_cast<Message *>(aMessage),
+                                                                     static_cast<const Ip6::MessageInfo *>(aMessageInfo),
+                                                                     aResult);
 }
 
-void MleRouter::HandleAddressSolicitResponse(Coap::Header *aHeader, Message *aMessage, ThreadError result)
+void MleRouter::HandleAddressSolicitResponse(Coap::Header *aHeader, Message *aMessage,
+                                             const Ip6::MessageInfo *aMessageInfo, ThreadError aResult)
 {
-    (void) result;
+    (void)aResult;
+    (void)aMessageInfo;
 
     ThreadStatusTlv statusTlv;
     ThreadRloc16Tlv rlocTlv;
@@ -3684,7 +3688,7 @@ void MleRouter::HandleAddressSolicitResponse(Coap::Header *aHeader, Message *aMe
     Router *router;
     bool old;
 
-    VerifyOrExit(result == kThreadError_None && aHeader != NULL && aMessage != NULL, ;);
+    VerifyOrExit(aResult == kThreadError_None && aHeader != NULL && aMessage != NULL, ;);
 
     VerifyOrExit(aHeader->GetCode() == kCoapResponseChanged, ;);
 
diff --git a/src/core/thread/mle_router_ftd.hpp b/src/core/thread/mle_router_ftd.hpp
index 34a70a14f..a4b57374e 100644
--- a/src/core/thread/mle_router_ftd.hpp
+++ b/src/core/thread/mle_router_ftd.hpp
@@ -757,8 +757,9 @@ private:
     void UpdateRoutes(const RouteTlv &aTlv, uint8_t aRouterId);
 
     static void HandleAddressSolicitResponse(void *aContext, otCoapHeader *aHeader, otMessage aMessage,
-                                             ThreadError result);
-    void HandleAddressSolicitResponse(Coap::Header *aHeader, Message *aMessage, ThreadError result);
+                                             const otMessageInfo *aMessageInfo, ThreadError result);
+    void HandleAddressSolicitResponse(Coap::Header *aHeader, Message *aMessage,
+                                      const Ip6::MessageInfo *aMessageInfo, ThreadError result);
     static void HandleAddressRelease(void *aContext, otCoapHeader *aHeader, otMessage aMessage,
                                      const otMessageInfo *aMessageInfo);
     void HandleAddressRelease(Coap::Header &aHeader, Message &aMessage, const Ip6::MessageInfo &aMessageInfo);
diff --git a/src/core/thread/network_diagnostic.cpp b/src/core/thread/network_diagnostic.cpp
index 7a46d3f06..7d46fb864 100644
--- a/src/core/thread/network_diagnostic.cpp
+++ b/src/core/thread/network_diagnostic.cpp
@@ -110,17 +110,21 @@ exit:
 }
 
 void NetworkDiagnostic::HandleDiagnosticGetResponse(void *aContext, otCoapHeader *aHeader, otMessage aMessage,
-                                                    ThreadError result)
+                                                    const otMessageInfo *aMessageInfo, ThreadError aResult)
 {
     static_cast<NetworkDiagnostic *>(aContext)->HandleDiagnosticGetResponse(static_cast<Coap::Header *>(aHeader),
-                                                                            static_cast<Message *>(aMessage), result);
+                                                                            static_cast<Message *>(aMessage),
+                                                                            static_cast<const Ip6::MessageInfo *>(aMessageInfo),
+                                                                            aResult);
 }
 
-void NetworkDiagnostic::HandleDiagnosticGetResponse(Coap::Header *aHeader, Message *aMessage, ThreadError result)
+void NetworkDiagnostic::HandleDiagnosticGetResponse(Coap::Header *aHeader, Message *aMessage,
+                                                    const Ip6::MessageInfo *aMessageInfo, ThreadError aResult)
 {
     (void)aMessage;
+    (void)aMessageInfo;
 
-    VerifyOrExit(result == kThreadError_None, ;);
+    VerifyOrExit(aResult == kThreadError_None, ;);
     VerifyOrExit(aHeader->GetCode() == kCoapResponseChanged, ;);
 
     otLogInfoNetDiag("Network Diagnostic get response received");
diff --git a/src/core/thread/network_diagnostic.hpp b/src/core/thread/network_diagnostic.hpp
index deb5d780d..539b766a1 100644
--- a/src/core/thread/network_diagnostic.hpp
+++ b/src/core/thread/network_diagnostic.hpp
@@ -110,8 +110,9 @@ public:
 
 private:
     static void HandleDiagnosticGetResponse(void *aContext, otCoapHeader *aHeader, otMessage aMessage,
-                                            ThreadError result);
-    void HandleDiagnosticGetResponse(Coap::Header *aHeader, Message *aMessage, ThreadError result);
+                                            const otMessageInfo *aMessageInfo, ThreadError aResult);
+    void HandleDiagnosticGetResponse(Coap::Header *aHeader, Message *aMessage,
+                                     const Ip6::MessageInfo *aMessageInfo, ThreadError aResult);
 
     static void HandleDiagnosticGet(void *aContext, otCoapHeader *aHeader, otMessage aMessage,
                                     const otMessageInfo *aMessageInfo);