Fix empty payload checksum being appended even if payload is empty.

pull/14/head
Ondřej Hruška 7 years ago
parent 7f6f21cdb7
commit 1f52a17fc2
  1. 8
      TinyFrame.c

@ -537,6 +537,7 @@ void _TF_FN TF_AcceptChar(TinyFrame *tf, unsigned char c)
}
if (tf->len == 0) {
// if the message has no body, we're done.
TF_HandleReceivedMessage(tf);
TF_ResetParser(tf);
break;
@ -773,6 +774,8 @@ static bool _TF_FN TF_SendFrame(TinyFrame *tf, TF_Msg *msg, TF_Listener listener
}
}
// Checksum only if message had a body
if (msg->len > 0) {
// Flush if checksum wouldn't fit in the buffer
if (TF_SENDBUF_LEN - len < sizeof(TF_CKSUM)) {
TF_WriteImpl(tf, (const uint8_t *) tf->sendbuf, len);
@ -780,9 +783,10 @@ static bool _TF_FN TF_SendFrame(TinyFrame *tf, TF_Msg *msg, TF_Listener listener
}
// Add checksum, flush what remains to be sent
len += TF_ComposeTail(tf->sendbuf+len, &cksum);
TF_WriteImpl(tf, (const uint8_t *) tf->sendbuf, len);
len += TF_ComposeTail(tf->sendbuf + len, &cksum);
}
TF_WriteImpl(tf, (const uint8_t *) tf->sendbuf, len);
TF_ReleaseTx(tf);
return true;

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