diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/target/fake_trx/data_dump.py | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/src/target/fake_trx/data_dump.py b/src/target/fake_trx/data_dump.py index b9047365..56e314c4 100644 --- a/src/target/fake_trx/data_dump.py +++ b/src/target/fake_trx/data_dump.py @@ -30,7 +30,7 @@ class DATADump: # Constants TAG_L12TRX = '\x01' TAG_TRX2L1 = '\x02' - HDR_LENGTH = 2 + HDR_LENGTH = 3 # Generates raw bytes from a DATA message # Return value: raw message bytes @@ -46,15 +46,18 @@ class DATADump: # Generate a message payload msg_raw = msg.gen_msg() - # Calculate the length + # Calculate and pack the message length msg_len = len(msg_raw) + # Pack to unsigned short (2 bytes, BE) + msg_len = struct.pack(">H", msg_len) + # Concatenate a message with header - return bytearray([tag, msg_len]) + msg_raw + return bytearray(tag + msg_len) + msg_raw def parse_hdr(self, hdr): # Extract the header info - msg_len = struct.unpack("<B", hdr[1])[0] + msg_len = struct.unpack(">H", hdr[1:3])[0] tag = hdr[0] # Check if tag is known |