FileData: add stream_offset field

This is required to store the offset for reassembling chunks.

src/util-file.c

@@ -492,6 +492,11 @@ int FileAppendData(FileContainer *ffc, uint8_t *data, uint32_t data_len)
         SCReturnInt(-1);
     }
 
+    if (ffc->tail->chunks_head == NULL)
+        ffd->stream_offset = 0;
+    else
+        ffd->stream_offset = ffc->tail->size;
+
     /* append the data */
     if (FileAppendFileData(ffc, ffd) < 0) {
         ffc->tail->state = FILE_STATE_ERROR;

src/util-file.h

@@ -53,6 +53,7 @@ typedef enum FileState_ {
 typedef struct FileData_ {
     uint8_t *data;
     uint32_t len;
+    uint64_t stream_offset;
     int stored;     /* true if this chunk has been stored already
                      * false otherwise */
     struct FileData_ *next;