fix m-m auto-answer response length and message search

src/ebusd/bushandler.cpp

@@ -442,15 +442,17 @@ void BusHandler::notifyProtocolMessage(MessageDirection direction, const MasterS
   }
   if (direction == md_answer) {
     size_t idLen = command.getDataSize();
-    if (master && idLen >= response.size()) {
+    size_t resLen = response.getDataSize();
+    if (master && idLen >= resLen) {
       // build MS auto-answer from MM with same ID
       SlaveSymbolString answer;
       answer.push_back(0);  // room for length
-      idLen -= response.size();
+      idLen -= resLen;
-      for (size_t pos = idLen; pos < response.size(); pos++) {
+      for (size_t pos = idLen; pos < resLen; pos++) {
         answer.push_back(command.dataAt(pos));
       }
-      m_protocol->setAnswer(SYN, command[1], command[2], command[3], command.data() + 5, idLen, answer);
+      answer.adjustHeader();
+      m_protocol->setAnswer(SYN, getSlaveAddress(dstAddress), command[2], command[3], command.data() + 5, idLen, answer);
       // TODO could use loaded messages for identifying MM/MS message pair
     }
   }

src/ebusd/mainloop.cpp

@@ -1240,7 +1240,7 @@ result_t MainLoop::executeAnswer(const vector<string>& args, ostringstream* ostr
     if (answer.size() > 16) {
       return RESULT_ERR_INVALID_POS;
     }
-    answer[0] = (symbol_t)(answer.size()-1);
+    answer.adjustHeader();
   }
   if (argPos < args.size()) {
     argPos = 0;  // print usage

src/lib/ebus/protocol_direct.cpp

@@ -872,7 +872,7 @@ bool DirectProtocolHandler::getAnswer() {
     if (it != m_answerByKey.end()) {
       // found the answer
       if (master) {
-        if (len+it->second.size() == m_command[4]) {
+        if (len+it->second.getDataSize() == m_command[4]) {
           m_response = it->second;  // copied for having the data size only
           return true;
         }
@@ -881,7 +881,6 @@ bool DirectProtocolHandler::getAnswer() {
         m_response = it->second;
         return true;
       }
-      break;
     }
     if (len == 0) {
       break;