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src_common/ethUstream.c

@@ -278,9 +278,9 @@ static void processV(txContext_t *context) {
 }
 
 
-static parserStatus_e processTxInternal(txContext_t *context, uint32_t processingFlags) {
+static parserStatus_e processTxInternal(txContext_t *context) {
     for (;;) {
-        bool processedCustom = false;
+        customStatus_e customStatus = CUSTOM_NOT_HANDLED;
         // EIP 155 style transasction
         if (context->currentField == TX_RLP_DONE) {
             return USTREAM_FINISHED;
@@ -341,13 +341,26 @@ static parserStatus_e processTxInternal(txContext_t *context, uint32_t processin
             context->processingField = true;
         }
         if (context->customProcessor != NULL) {
-            processedCustom = context->customProcessor(context);
+            customStatus = context->customProcessor(context);
+            switch(customStatus) {
+                case CUSTOM_NOT_HANDLED:
+                case CUSTOM_HANDLED:
+                    break;
+                case CUSTOM_SUSPENDED:
+                    return USTREAM_SUSPENDED;
+                case CUSTOM_FAULT:
+                    PRINTF("Custom processor aborted\n");
+                    return USTREAM_FAULT;                
+                default:
+                    PRINTF("Unhandled custom processor status\n");
+                    return USTREAM_FAULT;
+            }
         }
-        if (!processedCustom) {
+        if (customStatus == CUSTOM_NOT_HANDLED) {
             switch (context->currentField) {
             case TX_RLP_CONTENT:
                 processContent(context);
-                if ((processingFlags & TX_FLAG_TYPE) == 0) {
+                if ((context->processingFlags & TX_FLAG_TYPE) == 0) {                    
                     context->currentField++;
                 }
                 break;
@@ -392,7 +405,8 @@ parserStatus_e processTx(txContext_t *context, uint8_t *buffer,
         TRY {
             context->workBuffer = buffer;
             context->commandLength = length;
-            result = processTxInternal(context, processingFlags);
+            context->processingFlags = processingFlags;
+            result = processTxInternal(context);
         }
         CATCH_OTHER(e) {
             result = USTREAM_FAULT;
@@ -403,3 +417,19 @@ parserStatus_e processTx(txContext_t *context, uint8_t *buffer,
     END_TRY;
     return result;
 }
+
+parserStatus_e continueTx(txContext_t *context) {
+    parserStatus_e result;
+    BEGIN_TRY {
+        TRY {
+            result = processTxInternal(context);
+        }
+        CATCH_OTHER(e) {
+            result = USTREAM_FAULT;
+        }
+        FINALLY {
+        }
+    }
+    END_TRY;
+    return result;    
+}

src_common/ethUstream.h

@@ -21,7 +21,14 @@
 
 struct txContext_t;
 
-typedef bool (*ustreamProcess_t)(struct txContext_t *context);
+typedef enum customStatus_e {
+    CUSTOM_NOT_HANDLED,
+    CUSTOM_HANDLED,
+    CUSTOM_SUSPENDED,
+    CUSTOM_FAULT
+} customStatus_e;
+
+typedef customStatus_e (*ustreamProcess_t)(struct txContext_t *context);
 
 #define TX_FLAG_TYPE 0x01
 
@@ -43,6 +50,7 @@ typedef enum rlpTxField_e {
 
 typedef enum parserStatus_e {
     USTREAM_PROCESSING,
+    USTREAM_SUSPENDED,
     USTREAM_FINISHED,
     USTREAM_FAULT
 } parserStatus_e;
@@ -75,6 +83,7 @@ typedef struct txContext_t {
     uint32_t rlpBufferPos;
     uint8_t *workBuffer;
     uint32_t commandLength;
+    uint32_t processingFlags;
     ustreamProcess_t customProcessor;
     txContent_t *content;
     void *extra;
@@ -84,5 +93,6 @@ void initTx(txContext_t *context, cx_sha3_t *sha3, txContent_t *content,
             ustreamProcess_t customProcessor, void *extra);
 parserStatus_e processTx(txContext_t *context, uint8_t *buffer,
                          uint32_t length, uint32_t processingFlags);
+parserStatus_e continueTx(txContext_t *context);
 void copyTxData(txContext_t *context, uint8_t *out, uint32_t length);
 uint8_t readTxByte(txContext_t *context);