fixup! defining OTAInterface

Author: andreagilardoni

src/ota/interface/OTAInterfaceDefault.cpp

@@ -104,7 +104,7 @@ OTACloudProcessInterface::State OTADefaultCloudProcessInterface::fetch() {
     goto exit;
   }
 
-  parseOta(context->buffer, context->buf_len);
+  parseOta(context->buffer, http_res);
 
   // TODO verify that the information present in the ota header match the info in context
   if(context->downloadState == OtaDownloadCompleted) {
@@ -190,6 +190,10 @@ void OTADefaultCloudProcessInterface::parseOta(uint8_t* buffer, size_t buf_len)
       if(context->downloadedSize == http_client->contentLength()) {
         context->downloadState = OtaDownloadCompleted;
       }
+
+      if(context->downloadedSize > http_client->contentLength()) {
+        context->downloadState = OtaDownloadError;
+      }
       // TODO fail if we exceed a timeout? and available is 0 (client is broken)
       break;
     case OtaDownloadCompleted: