[TD-1827]<enhance>: force version check for client messages

src/client/src/tscServer.c

@@ -214,7 +214,7 @@ int tscSendMsgToServer(SSqlObj *pSql) {
   STscObj* pObj = pSql->pTscObj;
   SSqlCmd* pCmd = &pSql->cmd;
   
-  char *pMsg = rpcMallocCont(pCmd->payloadLen);
+  char *pMsg = rpcMallocCont(sizeof(SMsgVersion) + pCmd->payloadLen);
   if (NULL == pMsg) {
     tscError("%p msg:%s malloc failed", pSql, taosMsg[pSql->cmd.msgType]);
     return TSDB_CODE_TSC_OUT_OF_MEMORY;
@@ -225,7 +225,8 @@ int tscSendMsgToServer(SSqlObj *pSql) {
     tscDumpMgmtEpSet(pSql);
   }
 
-  memcpy(pMsg, pSql->cmd.payload, pSql->cmd.payloadLen);
+  tstrncpy(pMsg, version, sizeof(SMsgVersion));
+  memcpy(pMsg + sizeof(SMsgVersion), pSql->cmd.payload, pSql->cmd.payloadLen);
 
   SRpcMsg rpcMsg = {
       .msgType = pSql->cmd.msgType,

src/dnode/src/dnodeMRead.c

@@ -124,8 +124,6 @@ void dnodeDispatchToMReadQueue(SRpcMsg *pMsg) {
     SMnodeMsg *pRead = mnodeCreateMsg(pMsg);
     taosWriteQitem(tsMReadQueue, TAOS_QTYPE_RPC, pRead);
   }
-
-  rpcFreeCont(pMsg->pCont);
 }
 
 static void dnodeFreeMReadMsg(SMnodeMsg *pRead) {

src/dnode/src/dnodeMWrite.c

@@ -125,8 +125,6 @@ void dnodeDispatchToMWriteQueue(SRpcMsg *pMsg) {
            taosMsg[pWrite->rpcMsg.msgType], tsMWriteQueue);
     taosWriteQitem(tsMWriteQueue, TAOS_QTYPE_RPC, pWrite);
   }
-
-  rpcFreeCont(pMsg->pCont);
 }
 
 static void dnodeFreeMWriteMsg(SMnodeMsg *pWrite) {

src/dnode/src/dnodeShell.c

@@ -127,7 +127,18 @@ static void dnodeProcessMsgFromShell(SRpcMsg *pMsg, SRpcEpSet *pEpSet) {
   } else {}
 
   if ( dnodeProcessShellMsgFp[pMsg->msgType] ) {
+    SMsgVersion *pMsgVersion = pMsg->pCont;
+    if (taosCheckVersion(pMsgVersion->clientVersion, version, 3) != TSDB_CODE_SUCCESS) {
+      rpcMsg.code = TSDB_CODE_TSC_INVALID_VERSION;
+      rpcSendResponse(&rpcMsg);
+      rpcFreeCont(pMsg->pCont);
+      return; // todo change the error code
+    }
+    pMsg->pCont += sizeof(*pMsgVersion);
+
     (*dnodeProcessShellMsgFp[pMsg->msgType])(pMsg);
+
+    rpcFreeCont(pMsg->pCont - sizeof(*pMsgVersion));
   } else {
     dError("RPC %p, shell msg:%s is not processed", pMsg->handle, taosMsg[pMsg->msgType]);
     rpcMsg.code = TSDB_CODE_DND_MSG_NOT_PROCESSED;

src/dnode/src/dnodeVRead.c

@@ -77,8 +77,6 @@ void dnodeDispatchToVReadQueue(SRpcMsg *pMsg) {
     SRpcMsg rpcRsp = {.handle = pMsg->handle, .code = TSDB_CODE_VND_INVALID_VGROUP_ID};
     rpcSendResponse(&rpcRsp);
   }
-
-  rpcFreeCont(pMsg->pCont);
 }
 
 void *dnodeAllocVQueryQueue(void *pVnode) {

src/dnode/src/dnodeVWrite.c

@@ -102,7 +102,6 @@ void dnodeDispatchToVWriteQueue(SRpcMsg *pRpcMsg) {
   }
 
   vnodeRelease(pVnode);
-  rpcFreeCont(pRpcMsg->pCont);
 }
 
 void *dnodeAllocVWriteQueue(void *pVnode) {

src/inc/taosmsg.h

@@ -198,6 +198,10 @@ typedef struct {
   int32_t numOfVnodes;
 } SMsgDesc;
 
+typedef struct SMsgVersion {
+  char clientVersion[TSDB_VERSION_LEN];
+} SMsgVersion;
+
 typedef struct SMsgHead {
   int32_t contLen;
   int32_t vgId;