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allow storage of out of order zero length DTLS handshake messages

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This commit is contained in:
John Safranek
2015-06-17 12:37:10 -07:00
parent 19cad21a46
commit 7d9a1ccf42
1 changed files with 3 additions and 2 deletions
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5
src/internal.c
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@@ -2147,14 +2147,15 @@ void DtlsMsgSet(DtlsMsg* msg, word32 seq, const byte* data, byte type,
word32 fragOffset, word32 fragSz)
{
if (msg != NULL && data != NULL && msg->fragSz <= msg->sz &&
fragOffset < msg->sz && (fragOffset + fragSz) <= msg->sz) {
fragOffset <= msg->sz && (fragOffset + fragSz) <= msg->sz) {
msg->seq = seq;
msg->type = type;
msg->fragSz += fragSz;
/* If fragOffset is zero, this is either a full message that is out
* of order, or the first fragment of a fragmented message. Copy the
* handshake message header as well as the message data. */
* handshake message header with the message data. Zero length messages
* like Server Hello Done should be saved as well. */
if (fragOffset == 0)
XMEMCPY(msg->buf, data - DTLS_HANDSHAKE_HEADER_SZ,
fragSz + DTLS_HANDSHAKE_HEADER_SZ);