rpcrt4: Assign a unique id to the connection instead of changing it for each message.

dlls/rpcrt4/rpc_binding.h

@@ -67,6 +67,7 @@ typedef struct _RpcConnection
   TimeStamp exp;
   ULONG attr;
   RpcAuthInfo *AuthInfo;
+  ULONG auth_context_id;
   ULONG encryption_auth_len;
   ULONG signature_auth_len;
   RpcQualityOfService *QOS;

dlls/rpcrt4/rpc_message.c

@@ -813,14 +813,13 @@ static RPC_STATUS RPCRT4_SendWithAuth(RpcConnection *Connection, RpcPktHdr *Head
     if (Connection->AuthInfo && packet_has_auth_verifier(Header))
     {
       RpcAuthVerifier *auth_hdr = (RpcAuthVerifier *)&pkt[Header->common.frag_len - alen];
-      static LONG next_id;
 
       auth_hdr->auth_type = Connection->AuthInfo->AuthnSvc;
       auth_hdr->auth_level = Connection->AuthInfo->AuthnLevel;
       auth_hdr->auth_pad_length = auth_pad_len;
       auth_hdr->auth_reserved = 0;
       /* a unique number... */
-      auth_hdr->auth_context_id = InterlockedIncrement(&next_id);
+      auth_hdr->auth_context_id = Connection->auth_context_id;
 
       if (AuthLength)
         memcpy(auth_hdr + 1, Auth, AuthLength);

dlls/rpcrt4/rpc_transport.c

@@ -2800,6 +2800,7 @@ RPC_STATUS RPCRT4_CreateConnection(RpcConnection** Connection, BOOL server,
     LPCSTR Protseq, LPCSTR NetworkAddr, LPCSTR Endpoint,
     LPCWSTR NetworkOptions, RpcAuthInfo* AuthInfo, RpcQualityOfService *QOS)
 {
+  static LONG next_id;
   const struct connection_ops *ops;
   RpcConnection* NewConnection;
 
@@ -2827,6 +2828,7 @@ RPC_STATUS RPCRT4_CreateConnection(RpcConnection** Connection, BOOL server,
   NewConnection->attr = 0;
   if (AuthInfo) RpcAuthInfo_AddRef(AuthInfo);
   NewConnection->AuthInfo = AuthInfo;
+  NewConnection->auth_context_id = InterlockedIncrement( &next_id );
   NewConnection->encryption_auth_len = 0;
   NewConnection->signature_auth_len = 0;
   if (QOS) RpcQualityOfService_AddRef(QOS);