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DTLS rx size check, ssn10

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Allows for receiving datagrams larger than the MTU that are reassembled
by the IP stack.
This commit is contained in:
John Safranek
2013-05-17 10:29:34 -07:00
parent fd5937b599
commit b347df8d9a
3 changed files with 19 additions and 4 deletions
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src/internal.c
+4 -3
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@@ -1286,6 +1286,7 @@ int InitSSL(CYASSL* ssl, CYASSL_CTX* ctx)
ssl->IOCB_WriteCtx = &ssl->wfd; /* correctly set */
#ifdef CYASSL_DTLS
ssl->IOCB_CookieCtx = NULL; /* we don't use for default cb */
ssl->dtls_expected_rx = MAX_MTU;
#endif
#ifndef NO_OLD_TLS
@@ -4376,9 +4377,9 @@ static int GetInputData(CYASSL *ssl, word32 size)
#ifdef CYASSL_DTLS
if (ssl->options.dtls) {
if (size < MAX_MTU)
dtlsExtra = (int)(MAX_MTU - size);
inSz = MAX_MTU; /* read ahead up to MTU */
if (size < ssl->dtls_expected_rx)
dtlsExtra = (int)(ssl->dtls_expected_rx - size);
inSz = ssl->dtls_expected_rx;
}
#endif