sync ping

include/libs/sync/sync.h

@@ -71,15 +71,15 @@ typedef struct SSyncFSM {
 
   // when value in pBuf finish a raft flow, FpCommitCb is called, code indicates the result
   // user can do something according to the code and isWeak. for example, write data into tsdb
-  void (*FpCommitCb)(struct SSyncFSM* pFsm, const SSyncBuffer* pBuf, SyncIndex index, bool isWeak, int32_t code);
+  void (*FpCommitCb)(struct SSyncFSM* pFsm, const SRpcMsg* pBuf, SyncIndex index, bool isWeak, int32_t code);
 
   // when value in pBuf has been written into local log store, FpPreCommitCb is called, code indicates the result
   // user can do something according to the code and isWeak. for example, write data into tsdb
-  void (*FpPreCommitCb)(struct SSyncFSM* pFsm, const SSyncBuffer* pBuf, SyncIndex index, bool isWeak, int32_t code);
+  void (*FpPreCommitCb)(struct SSyncFSM* pFsm, const SRpcMsg* pBuf, SyncIndex index, bool isWeak, int32_t code);
 
   // when log entry is updated by a new one, FpRollBackCb is called
   // user can do something to roll back. for example, delete data from tsdb, or just ignore it
-  void (*FpRollBackCb)(struct SSyncFSM* pFsm, const SSyncBuffer* pBuf, SyncIndex index, bool isWeak, int32_t code);
+  void (*FpRollBackCb)(struct SSyncFSM* pFsm, const SRpcMsg* pBuf, SyncIndex index, bool isWeak, int32_t code);
 
   // user should implement this function, use "data" to take snapshot into "snapshot"
   int32_t (*FpTakeSnapshot)(SSnapshot* snapshot);
@@ -95,10 +95,10 @@ typedef struct SSyncLogStore {
   void* data;
 
   // append one log entry
-  int32_t (*appendEntry)(struct SSyncLogStore* pLogStore, SSyncBuffer* pBuf);
+  int32_t (*appendEntry)(struct SSyncLogStore* pLogStore, SRpcMsg* pBuf);
 
   // get one log entry, user need to free pBuf->data
-  int32_t (*getEntry)(struct SSyncLogStore* pLogStore, SyncIndex index, SSyncBuffer* pBuf);
+  int32_t (*getEntry)(struct SSyncLogStore* pLogStore, SyncIndex index, SRpcMsg* pBuf);
 
   // update log store commit index with "index"
   int32_t (*updateCommitIndex)(struct SSyncLogStore* pLogStore, SyncIndex index);
@@ -153,8 +153,8 @@ int64_t syncStart(const SSyncInfo* pSyncInfo);
 void    syncStop(int64_t rid);
 int32_t syncReconfig(int64_t rid, const SSyncCfg* pSyncCfg);
 
-// int32_t syncForwardToPeer(int64_t rid, const SRpcMsg* pBuf, bool isWeak);
-int32_t syncForwardToPeer(int64_t rid, const SSyncBuffer* pBuf, bool isWeak);
+int32_t syncForwardToPeer(int64_t rid, const SRpcMsg* pBuf, bool isWeak);
+// int32_t syncForwardToPeer(int64_t rid, const SSyncBuffer* pBuf, bool isWeak);
 
 ESyncState syncGetMyRole(int64_t rid);
 void       syncGetNodesRole(int64_t rid, SNodesRole* pNodeRole);

source/libs/sync/inc/syncInt.h

@@ -92,8 +92,8 @@ struct SSyncEnv;
 typedef struct SSyncEnv SSyncEnv;
 
 typedef struct SRaftId {
-  SyncNodeId  addr;
-  SyncGroupId vgId;
+  SyncNodeId  addr;  // typedef uint64_t SyncNodeId;
+  SyncGroupId vgId;  // typedef int32_t  SyncGroupId;
 } SRaftId;
 
 typedef struct SSyncNode {
@@ -133,17 +133,17 @@ typedef struct SSyncNode {
   uint64_t          heartbeatTimerCounter;
 
   // callback
-  int32_t (*FpOnPing)(struct SSyncNode* ths, SyncPing* pMsg);
+  int32_t (*FpOnPing)(SSyncNode* ths, SyncPing* pMsg);
 
-  int32_t (*FpOnPingReply)(struct SSyncNode* ths, SyncPingReply* pMsg);
+  int32_t (*FpOnPingReply)(SSyncNode* ths, SyncPingReply* pMsg);
 
-  int32_t (*FpOnRequestVote)(struct SSyncNode* ths, SyncRequestVote* pMsg);
+  int32_t (*FpOnRequestVote)(SSyncNode* ths, SyncRequestVote* pMsg);
 
-  int32_t (*FpOnRequestVoteReply)(struct SSyncNode* ths, SyncRequestVoteReply* pMsg);
+  int32_t (*FpOnRequestVoteReply)(SSyncNode* ths, SyncRequestVoteReply* pMsg);
 
-  int32_t (*FpOnAppendEntries)(struct SSyncNode* ths, SyncAppendEntries* pMsg);
+  int32_t (*FpOnAppendEntries)(SSyncNode* ths, SyncAppendEntries* pMsg);
 
-  int32_t (*FpOnAppendEntriesReply)(struct SSyncNode* ths, SyncAppendEntriesReply* pMsg);
+  int32_t (*FpOnAppendEntriesReply)(SSyncNode* ths, SyncAppendEntriesReply* pMsg);
 
   // passed from outside
   void* rpcClient;

source/libs/sync/inc/syncMessage.h

@@ -27,6 +27,7 @@ extern "C" {
 #include "syncRaftEntry.h"
 #include "taosdef.h"
 
+// encode as uint64
 typedef enum ESyncMessageType {
   SYNC_PING = 0,
   SYNC_PING_REPLY,
@@ -38,29 +39,47 @@ typedef enum ESyncMessageType {
   SYNC_APPEND_ENTRIES_REPLY,
 } ESyncMessageType;
 
+/*
+typedef struct SRaftId {
+  SyncNodeId  addr;  // typedef uint64_t SyncNodeId;
+  SyncGroupId vgId;  // typedef int32_t  SyncGroupId;
+} SRaftId;
+*/
+
 typedef struct SyncPing {
-  ESyncMessageType   msgType;
-  const SSyncBuffer *pData;
-} SyncPing, RaftPing;
+  uint32_t bytes;
+  uint32_t msgType;
+  SRaftId  srcId;
+  SRaftId  destId;
+  uint32_t dataLen;
+  char*    data;
+} SyncPing;
+
+#define SYNC_PING_FIX_LEN (sizeof(uint32_t) + sizeof(uint32_t) + sizeof(SRaftId) + sizeof(SRaftId) + sizeof(uint32_t))
 
 typedef struct SyncPingReply {
-  ESyncMessageType   msgType;
-  const SSyncBuffer *pData;
-} SyncPingReply, RaftPingReply;
+  uint32_t bytes;
+  uint32_t msgType;
+  SRaftId  srcId;
+  SRaftId  destId;
+  uint32_t dataLen;
+  char*    data;
+} SyncPingReply;
 
 typedef struct SyncClientRequest {
-  ESyncMessageType   msgType;
-  const SSyncBuffer *pData;
-  int64_t            seqNum;
-  bool               isWeak;
-} SyncClientRequest, RaftClientRequest;
+  ESyncMessageType msgType;
+  char*            data;
+  uint32_t         dataLen;
+  int64_t          seqNum;
+  bool             isWeak;
+} SyncClientRequest;
 
 typedef struct SyncClientRequestReply {
-  ESyncMessageType   msgType;
-  int32_t            errCode;
-  const SSyncBuffer *pErrMsg;
-  const SSyncBuffer *pLeaderHint;
-} SyncClientRequestReply, RaftClientRequestReply;
+  ESyncMessageType msgType;
+  int32_t          errCode;
+  SSyncBuffer*     pErrMsg;
+  SSyncBuffer*     pLeaderHint;
+} SyncClientRequestReply;
 
 typedef struct SyncRequestVote {
   ESyncMessageType msgType;
@@ -69,7 +88,7 @@ typedef struct SyncRequestVote {
   SyncGroupId      vgId;
   SyncIndex        lastLogIndex;
   SyncTerm         lastLogTerm;
-} SyncRequestVote, RaftRequestVote;
+} SyncRequestVote;
 
 typedef struct SyncRequestVoteReply {
   ESyncMessageType msgType;
@@ -77,7 +96,7 @@ typedef struct SyncRequestVoteReply {
   SyncNodeId       nodeId;
   SyncGroupId      vgId;
   bool             voteGranted;
-} SyncRequestVoteReply, RaftRequestVoteReply;
+} SyncRequestVoteReply;
 
 typedef struct SyncAppendEntries {
   ESyncMessageType msgType;
@@ -86,9 +105,9 @@ typedef struct SyncAppendEntries {
   SyncIndex        prevLogIndex;
   SyncTerm         prevLogTerm;
   int32_t          entryCount;
-  SSyncRaftEntry * logEntries;
+  SSyncRaftEntry*  logEntries;
   SyncIndex        commitIndex;
-} SyncAppendEntries, RaftAppendEntries;
+} SyncAppendEntries;
 
 typedef struct SyncAppendEntriesReply {
   ESyncMessageType msgType;
@@ -96,7 +115,18 @@ typedef struct SyncAppendEntriesReply {
   SyncNodeId       nodeId;
   bool             success;
   SyncIndex        matchIndex;
-} SyncAppendEntriesReply, RaftAppendEntriesReply;
+} SyncAppendEntriesReply;
+
+// ---- message build ----
+SyncPing* syncPingBuild(uint32_t dataLen);
+
+void syncPingDestroy(SyncPing* pSyncPing);
+
+void syncPingSerialize(const SyncPing* pSyncPing, char* buf, uint32_t bufLen);
+
+void syncPingDeserialize(const char* buf, uint32_t len, SyncPing* pSyncPing);
+
+void syncPing2RpcMsg(const SyncPing* pSyncPing, SRpcMsg* pRpcMsg);
 
 #ifdef __cplusplus
 }

source/libs/sync/inc/syncUtil.h

@@ -27,11 +27,28 @@ extern "C" {
 #include "syncMessage.h"
 #include "taosdef.h"
 
-void nodeInfo2EpSet(const SNodeInfo* pNodeInfo, SEpSet* pEpSet);
+// ---- encode / decode
 
-void raftId2EpSet(const SRaftId* raftId, SEpSet* pEpSet);
+uint64_t syncUtilAddr2U64(const char* host, uint16_t port);
 
-void syncPing2RpcMsg(const SyncPing* pMsg, SRpcMsg* pRpcMsg);
+void syncUtilU642Addr(uint64_t u64, char* host, size_t len, uint16_t* port);
+
+void syncUtilnodeInfo2EpSet(const SNodeInfo* pNodeInfo, SEpSet* pEpSet);
+
+void syncUtilraftId2EpSet(const SRaftId* raftId, SEpSet* pEpSet);
+
+void syncUtilnodeInfo2raftId(const SNodeInfo* pNodeInfo, SyncGroupId vgId, SRaftId* raftId);
+
+// ---- SSyncBuffer ----
+#if 0
+void syncUtilbufBuild(SSyncBuffer* syncBuf, size_t len);
+
+void syncUtilbufDestroy(SSyncBuffer* syncBuf);
+
+void syncUtilbufCopy(const SSyncBuffer* src, SSyncBuffer* dest);
+
+void syncUtilbufCopyDeep(const SSyncBuffer* src, SSyncBuffer* dest);
+#endif
 
 #ifdef __cplusplus
 }

source/libs/sync/src/syncMain.c

@@ -23,19 +23,20 @@
 static int32_t tsNodeRefId = -1;
 
 // ------ local funciton ---------
-static int32_t doSyncNodeSendMsgById(SRaftId* destRaftId, struct SSyncNode* pSyncNode, SRpcMsg* pMsg);
-static int32_t doSyncNodeSendMsgByInfo(SNodeInfo* nodeInfo, struct SSyncNode* pSyncNode, SRpcMsg* pMsg);
-
-static int32_t doSyncNodePing(struct SSyncNode* ths, const SyncPing* pMsg);
-static int32_t onSyncNodePing(struct SSyncNode* ths, SyncPing* pMsg);
-static int32_t onSyncNodePingReply(struct SSyncNode* ths, SyncPingReply* pMsg);
-static int32_t doSyncNodeRequestVote(struct SSyncNode* ths, const SyncRequestVote* pMsg);
-static int32_t onSyncNodeRequestVote(struct SSyncNode* ths, SyncRequestVote* pMsg);
-static int32_t onSyncNodeRequestVoteReply(struct SSyncNode* ths, SyncRequestVoteReply* pMsg);
-static int32_t doSyncNodeAppendEntries(struct SSyncNode* ths, const SyncAppendEntries* pMsg);
-static int32_t onSyncNodeAppendEntries(struct SSyncNode* ths, SyncAppendEntries* pMsg);
-static int32_t onSyncNodeAppendEntriesReply(struct SSyncNode* ths, SyncAppendEntriesReply* pMsg);
+static int32_t syncNodeSendMsgById(const SRaftId* destRaftId, SSyncNode* pSyncNode, SRpcMsg* pMsg);
+static int32_t syncNodeSendMsgByInfo(const SNodeInfo* nodeInfo, SSyncNode* pSyncNode, SRpcMsg* pMsg);
 static void    syncNodePingTimerCb(void* param, void* tmrId);
+
+static int32_t syncNodePing(SSyncNode* pSyncNode, const SRaftId* destRaftId, SyncPing* pMsg);
+static int32_t syncNodeRequestVote(SSyncNode* ths, const SyncRequestVote* pMsg);
+static int32_t syncNodeAppendEntries(SSyncNode* ths, const SyncAppendEntries* pMsg);
+
+static int32_t syncNodeOnPingCb(SSyncNode* ths, SyncPing* pMsg);
+static int32_t syncNodeOnPingReplyCb(SSyncNode* ths, SyncPingReply* pMsg);
+static int32_t syncNodeOnRequestVoteCb(SSyncNode* ths, SyncRequestVote* pMsg);
+static int32_t syncNodeOnRequestVoteReplyCb(SSyncNode* ths, SyncRequestVoteReply* pMsg);
+static int32_t syncNodeOnAppendEntriesCb(SSyncNode* ths, SyncAppendEntries* pMsg);
+static int32_t syncNodeOnAppendEntriesReplyCb(SSyncNode* ths, SyncAppendEntriesReply* pMsg);
 // ---------------------------------
 
 int32_t syncInit() {
@@ -55,7 +56,9 @@ void syncStop(int64_t rid) {}
 
 int32_t syncReconfig(int64_t rid, const SSyncCfg* pSyncCfg) { return 0; }
 
-int32_t syncForwardToPeer(int64_t rid, const SSyncBuffer* pBuf, bool isWeak) { return 0; }
+// int32_t syncForwardToPeer(int64_t rid, const SSyncBuffer* pBuf, bool isWeak) { return 0; }
+
+int32_t syncForwardToPeer(int64_t rid, const SRpcMsg* pBuf, bool isWeak) { return 0; }
 
 ESyncState syncGetMyRole(int64_t rid) { return TAOS_SYNC_STATE_LEADER; }
 
@@ -75,12 +78,12 @@ SSyncNode* syncNodeOpen(const SSyncInfo* pSyncInfo) {
   pSyncNode->rpcClient = pSyncInfo->rpcClient;
   pSyncNode->FpSendMsg = pSyncInfo->FpSendMsg;
 
-  pSyncNode->FpOnPing = onSyncNodePing;
-  pSyncNode->FpOnPingReply = onSyncNodePingReply;
-  pSyncNode->FpOnRequestVote = onSyncNodeRequestVote;
-  pSyncNode->FpOnRequestVoteReply = onSyncNodeRequestVoteReply;
-  pSyncNode->FpOnAppendEntries = onSyncNodeAppendEntries;
-  pSyncNode->FpOnAppendEntriesReply = onSyncNodeAppendEntriesReply;
+  pSyncNode->FpOnPing = syncNodeOnPingCb;
+  pSyncNode->FpOnPingReply = syncNodeOnPingReplyCb;
+  pSyncNode->FpOnRequestVote = syncNodeOnRequestVoteCb;
+  pSyncNode->FpOnRequestVoteReply = syncNodeOnRequestVoteReplyCb;
+  pSyncNode->FpOnAppendEntries = syncNodeOnAppendEntriesCb;
+  pSyncNode->FpOnAppendEntriesReply = syncNodeOnAppendEntriesReplyCb;
 
   return pSyncNode;
 }
@@ -92,13 +95,35 @@ void syncNodeClose(SSyncNode* pSyncNode) {
 
 void syncNodePingAll(SSyncNode* pSyncNode) {
   sTrace("syncNodePingAll %p ", pSyncNode);
-  SyncPing msg;
-  doSyncNodePing(pSyncNode, &msg);
+  int32_t ret = 0;
+  for (int i = 0; i < pSyncNode->syncCfg.replicaNum; ++i) {
+    SyncPing* pSyncPing;
+    SRaftId   raftId;
+    syncUtilnodeInfo2raftId(&pSyncNode->syncCfg.nodeInfo[i], pSyncNode->vgId, &raftId);
+    ret = syncNodePing(pSyncNode, &raftId, pSyncPing);
+    assert(ret == 0);
+  }
 }
 
-void syncNodePingPeers(SSyncNode* pSyncNode) {}
+void syncNodePingPeers(SSyncNode* pSyncNode) {
+  int32_t ret = 0;
+  for (int i = 0; i < pSyncNode->peersNum; ++i) {
+    SyncPing* pSyncPing;
+    SRaftId   raftId;
+    syncUtilnodeInfo2raftId(&pSyncNode->peers[i], pSyncNode->vgId, &raftId);
+    ret = syncNodePing(pSyncNode, &raftId, pSyncPing);
+    assert(ret == 0);
+  }
+}
 
-void syncNodePingSelf(SSyncNode* pSyncNode) {}
+void syncNodePingSelf(SSyncNode* pSyncNode) {
+  int32_t   ret = 0;
+  SyncPing* pSyncPing;
+  SRaftId   raftId;
+  syncUtilnodeInfo2raftId(&pSyncNode->me, pSyncNode->vgId, &raftId);
+  ret = syncNodePing(pSyncNode, &raftId, pSyncPing);
+  assert(ret == 0);
+}
 
 int32_t syncNodeStartPingTimer(SSyncNode* pSyncNode) {
   if (pSyncNode->pPingTimer == NULL) {
@@ -120,69 +145,64 @@ int32_t syncNodeStopPingTimer(SSyncNode* pSyncNode) {
 }
 
 // ------ local funciton ---------
-
-static int32_t doSyncNodeSendMsgById(SRaftId* destRaftId, struct SSyncNode* pSyncNode, SRpcMsg* pMsg) {
-  SEpSet epSet;
-  raftId2EpSet(destRaftId, &epSet);
-  pSyncNode->FpSendMsg(pSyncNode->rpcClient, &epSet, pMsg);
-  return 0;
-}
-
-static int32_t doSyncNodeSendMsgByInfo(SNodeInfo* nodeInfo, struct SSyncNode* pSyncNode, SRpcMsg* pMsg) {
-  SEpSet epSet;
-  nodeInfo2EpSet(nodeInfo, &epSet);
-
-  pSyncNode->FpSendMsg(pSyncNode->rpcClient, &epSet, pMsg);
-  return 0;
-}
-
-static int32_t doSyncNodePing(struct SSyncNode* ths, const SyncPing* pMsg) {
-  int32_t ret;
-  for (int i = 0; i < ths->syncCfg.replicaNum; ++i) {
-    SRpcMsg* rpcMsg;
-    syncPing2RpcMsg(pMsg, rpcMsg);
-    doSyncNodeSendMsgByInfo(&ths->syncCfg.nodeInfo[i], ths, rpcMsg);
-  }
-
+static int32_t syncNodePing(SSyncNode* pSyncNode, const SRaftId* destRaftId, SyncPing* pMsg) {
+  int32_t  ret = 0;
+  SRpcMsg* rpcMsg;
+  syncPing2RpcMsg(pMsg, rpcMsg);
+  syncNodeSendMsgById(destRaftId, pSyncNode, rpcMsg);
   return ret;
 }
 
-static int32_t onSyncNodePing(struct SSyncNode* ths, SyncPing* pMsg) {
+static int32_t syncNodeRequestVote(SSyncNode* ths, const SyncRequestVote* pMsg) {
   int32_t ret = 0;
   return ret;
 }
 
-static int32_t onSyncNodePingReply(struct SSyncNode* ths, SyncPingReply* pMsg) {
+static int32_t syncNodeAppendEntries(SSyncNode* ths, const SyncAppendEntries* pMsg) {
   int32_t ret = 0;
   return ret;
 }
 
-static int32_t doSyncNodeRequestVote(struct SSyncNode* ths, const SyncRequestVote* pMsg) {
+static int32_t syncNodeSendMsgById(const SRaftId* destRaftId, SSyncNode* pSyncNode, SRpcMsg* pMsg) {
+  SEpSet epSet;
+  syncUtilraftId2EpSet(destRaftId, &epSet);
+  pSyncNode->FpSendMsg(pSyncNode->rpcClient, &epSet, pMsg);
+  return 0;
+}
+
+static int32_t syncNodeSendMsgByInfo(const SNodeInfo* nodeInfo, SSyncNode* pSyncNode, SRpcMsg* pMsg) {
+  SEpSet epSet;
+  syncUtilnodeInfo2EpSet(nodeInfo, &epSet);
+  pSyncNode->FpSendMsg(pSyncNode->rpcClient, &epSet, pMsg);
+  return 0;
+}
+
+static int32_t syncNodeOnPingCb(SSyncNode* ths, SyncPing* pMsg) {
   int32_t ret = 0;
   return ret;
 }
 
-static int32_t onSyncNodeRequestVote(struct SSyncNode* ths, SyncRequestVote* pMsg) {
+static int32_t syncNodeOnPingReplyCb(SSyncNode* ths, SyncPingReply* pMsg) {
   int32_t ret = 0;
   return ret;
 }
 
-static int32_t onSyncNodeRequestVoteReply(struct SSyncNode* ths, SyncRequestVoteReply* pMsg) {
+static int32_t syncNodeOnRequestVoteCb(SSyncNode* ths, SyncRequestVote* pMsg) {
   int32_t ret = 0;
   return ret;
 }
 
-static int32_t doSyncNodeAppendEntries(struct SSyncNode* ths, const SyncAppendEntries* pMsg) {
+static int32_t syncNodeOnRequestVoteReplyCb(SSyncNode* ths, SyncRequestVoteReply* pMsg) {
   int32_t ret = 0;
   return ret;
 }
 
-static int32_t onSyncNodeAppendEntries(struct SSyncNode* ths, SyncAppendEntries* pMsg) {
+static int32_t syncNodeOnAppendEntriesCb(SSyncNode* ths, SyncAppendEntries* pMsg) {
   int32_t ret = 0;
   return ret;
 }
 
-static int32_t onSyncNodeAppendEntriesReply(struct SSyncNode* ths, SyncAppendEntriesReply* pMsg) {
+static int32_t syncNodeOnAppendEntriesReplyCb(SSyncNode* ths, SyncAppendEntriesReply* pMsg) {
   int32_t ret = 0;
   return ret;
 }

source/libs/sync/src/syncMessage.c

@@ -15,5 +15,133 @@
 
 #include "syncMessage.h"
 #include "syncRaft.h"
+#include "tcoding.h"
 
-void onMessage(SRaft *pRaft, void *pMsg) {}
+void onMessage(SRaft* pRaft, void* pMsg) {}
\ No newline at end of file
+
+// ---- message build ----
+SyncPing* syncPingBuild(uint32_t dataLen) {
+  uint32_t  bytes = SYNC_PING_FIX_LEN + dataLen;
+  SyncPing* pSyncPing = malloc(bytes);
+  memset(pSyncPing, 0, bytes);
+  pSyncPing->bytes = bytes;
+  pSyncPing->msgType = SYNC_PING;
+  pSyncPing->dataLen = dataLen;
+}
+
+void syncPingDestroy(SyncPing* pSyncPing) {
+  if (pSyncPing != NULL) {
+    free(pSyncPing);
+  }
+}
+
+void syncPingSerialize(const SyncPing* pSyncPing, char* buf, uint32_t bufLen) {
+  assert(pSyncPing->bytes <= bufLen);
+  memcpy(buf, pSyncPing, pSyncPing->bytes);
+}
+
+void syncPingDeserialize(const char* buf, uint32_t len, SyncPing* pSyncPing) {
+  uint32_t* pU32 = (uint32_t*)buf;
+  uint32_t  bytes = *pU32;
+  pSyncPing = (SyncPing*)malloc(bytes);
+  memcpy(pSyncPing, buf, len);
+  assert(len == pSyncPing->bytes);
+  assert(pSyncPing->bytes == SYNC_PING_FIX_LEN + pSyncPing->dataLen);
+}
+
+void syncPing2RpcMsg(const SyncPing* pSyncPing, SRpcMsg* pRpcMsg) {
+  pRpcMsg->msgType = pSyncPing->msgType;
+  uint32_t bufLen = pSyncPing->bytes;
+  char*    buf = malloc(bufLen);
+  syncPingSerialize(pSyncPing, buf, bufLen);
+  pRpcMsg->contLen = bufLen;
+  pRpcMsg->pCont = rpcMallocCont(pRpcMsg->contLen);
+  memcpy(pRpcMsg->pCont, buf, pRpcMsg->contLen);
+  free(buf);
+}
+
+/*
+typedef struct SRaftId {
+  SyncNodeId  addr;  // typedef uint64_t SyncNodeId;
+  SyncGroupId vgId;  // typedef int32_t  SyncGroupId;
+} SRaftId;
+
+typedef struct SyncPing {
+  uint32_t bytes;
+  uint32_t msgType;
+  SRaftId  srcId;
+  SRaftId  destId;
+  uint32_t dataLen;
+  char*    data;
+} SyncPing;
+*/
+
+/*
+void syncPingSerialize(const SyncPing* pSyncPing, char** ppBuf, uint32_t* bufLen) {
+  *bufLen = sizeof(SyncPing) + pSyncPing->dataLen;
+  *ppBuf = (char*)malloc(*bufLen);
+  void*    pStart = *ppBuf;
+  uint32_t allBytes = *bufLen;
+
+  int len = 0;
+  len = taosEncodeFixedU32(&pStart, pSyncPing->msgType);
+  allBytes -= len;
+  assert(len > 0);
+  pStart += len;
+
+  len = taosEncodeFixedU64(&pStart, pSyncPing->srcId.addr);
+  allBytes -= len;
+  assert(len > 0);
+  pStart += len;
+
+  len = taosEncodeFixedI32(&pStart, pSyncPing->srcId.vgId);
+  allBytes -= len;
+  assert(len > 0);
+  pStart += len;
+
+  len = taosEncodeFixedU64(&pStart, pSyncPing->destId.addr);
+  allBytes -= len;
+  assert(len > 0);
+  pStart += len;
+
+  len = taosEncodeFixedI32(&pStart, pSyncPing->destId.vgId);
+  allBytes -= len;
+  assert(len > 0);
+  pStart += len;
+
+  len = taosEncodeFixedU32(&pStart, pSyncPing->dataLen);
+  allBytes -= len;
+  assert(len > 0);
+  pStart += len;
+
+  memcpy(pStart, pSyncPing->data, pSyncPing->dataLen);
+  allBytes -= pSyncPing->dataLen;
+  assert(allBytes == 0);
+}
+
+
+void syncPingDeserialize(const char* buf, uint32_t len, SyncPing* pSyncPing) {
+  void*    pStart = (void*)buf;
+  uint64_t u64;
+  int32_t  i32;
+  uint32_t u32;
+
+  pStart = taosDecodeFixedU64(pStart, &u64);
+  pSyncPing->msgType = u64;
+
+  pStart = taosDecodeFixedU64(pStart, &u64);
+  pSyncPing->srcId.addr = u64;
+
+  pStart = taosDecodeFixedI32(pStart, &i32);
+  pSyncPing->srcId.vgId = i32;
+
+  pStart = taosDecodeFixedU64(pStart, &u64);
+  pSyncPing->destId.addr = u64;
+
+  pStart = taosDecodeFixedI32(pStart, &i32);
+  pSyncPing->destId.vgId = i32;
+
+  pStart = taosDecodeFixedU32(pStart, &u32);
+  pSyncPing->dataLen = u32;
+}
+*/
\ No newline at end of file

source/libs/sync/src/syncUtil.c

@@ -14,9 +14,64 @@
  */
 
 #include "syncUtil.h"
+#include <arpa/inet.h>
+#include <netinet/in.h>
+#include <sys/socket.h>
 
-void nodeInfo2EpSet(const SNodeInfo* pNodeInfo, SEpSet* pEpSet) {}
+// ---- encode / decode
+uint64_t syncUtilAddr2U64(const char* host, uint16_t port) {
+  uint64_t u64;
+  uint32_t hostU32 = (uint32_t)inet_addr(host);
+  assert(hostU32 != (uint32_t)-1);
+  u64 = (((uint64_t)hostU32) << 32) | (((uint32_t)port) << 16);
+  return u64;
+}
 
-void raftId2EpSet(const SRaftId* raftId, SEpSet* pEpSet) {}
+void syncUtilU642Addr(uint64_t u64, char* host, size_t len, uint16_t* port) {
+  uint32_t hostU32 = (uint32_t)((u64 >> 32) & 0x00000000FFFFFFFF);
 
-void syncPing2RpcMsg(const SyncPing* pMsg, SRpcMsg* pRpcMsg) {}
+  struct in_addr addr;
\ No newline at end of file
+  addr.s_addr = hostU32;
+  snprintf(host, len, "%s", inet_ntoa(addr));
+  *port = (uint16_t)((u64 & 0x00000000FFFF0000) >> 16);
+}
+
+void syncUtilnodeInfo2EpSet(const SNodeInfo* pNodeInfo, SEpSet* pEpSet) {
+  pEpSet->inUse = 0;
+  addEpIntoEpSet(pEpSet, pNodeInfo->nodeFqdn, pNodeInfo->nodePort);
+}
+
+void syncUtilraftId2EpSet(const SRaftId* raftId, SEpSet* pEpSet) {
+  char     host[TSDB_FQDN_LEN];
+  uint16_t port;
+
+  syncUtilU642Addr(raftId->addr, host, sizeof(host), &port);
+  pEpSet->inUse = 0;
+  addEpIntoEpSet(pEpSet, host, port);
+}
+
+void syncUtilnodeInfo2raftId(const SNodeInfo* pNodeInfo, SyncGroupId vgId, SRaftId* raftId) {
+  raftId->addr = syncUtilAddr2U64(pNodeInfo->nodeFqdn, pNodeInfo->nodePort);
+  raftId->vgId = vgId;
+}
+
+// ---- SSyncBuffer -----
+#if 0
+void syncUtilbufBuild(SSyncBuffer* syncBuf, size_t len) {
+  syncBuf->len = len;
+  syncBuf->data = malloc(syncBuf->len);
+}
+
+void syncUtilbufDestroy(SSyncBuffer* syncBuf) { free(syncBuf->data); }
+
+void syncUtilbufCopy(const SSyncBuffer* src, SSyncBuffer* dest) {
+  dest->len = src->len;
+  dest->data = src->data;
+}
+
+void syncUtilbufCopyDeep(const SSyncBuffer* src, SSyncBuffer* dest) {
+  dest->len = src->len;
+  dest->data = malloc(dest->len);
+  memcpy(dest->data, src->data, dest->len);
+}
+#endif
\ No newline at end of file