26 struct FDMsgHeader {  struct
90   char HeaderBuffer[FDMsgHeader::Size];  in sendMessage()
92   *((support::ulittle64_t *)(HeaderBuffer + FDMsgHeader::MsgSizeOffset)) =  in sendMessage()
93       FDMsgHeader::Size + ArgBytes.size();  in sendMessage()
94   *((support::ulittle64_t *)(HeaderBuffer + FDMsgHeader::OpCOffset)) =  in sendMessage()
96   *((support::ulittle64_t *)(HeaderBuffer + FDMsgHeader::SeqNoOffset)) = SeqNo;  in sendMessage()
97   *((support::ulittle64_t *)(HeaderBuffer + FDMsgHeader::TagAddrOffset)) =  in sendMessage()
104   if (int ErrNo = writeBytes(HeaderBuffer, FDMsgHeader::Size))  in sendMessage()
190     char HeaderBuffer[FDMsgHeader::Size];  in listenLoop()
194       if (auto Err2 = readBytes(HeaderBuffer, FDMsgHeader::Size, &IsEOF)) {  in listenLoop()
209         *((support::ulittle64_t *)(HeaderBuffer + FDMsgHeader::MsgSizeOffset));  in listenLoop()
211         *((support::ulittle64_t *)(HeaderBuffer + FDMsgHeader::OpCOffset))));  in listenLoop()
213         *((support::ulittle64_t *)(HeaderBuffer + FDMsgHeader::SeqNoOffset));  in listenLoop()
215         *((support::ulittle64_t *)(HeaderBuffer + FDMsgHeader::TagAddrOffset)));  in listenLoop()
217     if (MsgSize < FDMsgHeader::Size) {  in listenLoop()
226     ArgBytes.resize(MsgSize - FDMsgHeader::Size);  in listenLoop()