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Merge pull request #1932 from dgarske/maxfrag_reconf 

Post-handshake max fragment size adjustment
pull/1939/head
toddouska 2018-11-26 13:27:26 -08:00 committed by GitHub
parent 3afa9a3886 7a24d4e46f
commit 55bbffe3c6
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1 changed files with 20 additions and 0 deletions
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src/ssl.c
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@ -1957,6 +1957,26 @@ int wolfSSL_UseMaxFragment(WOLFSSL* ssl, byte mfl)
if (ssl == NULL) if (ssl == NULL)
return BAD_FUNC_ARG; return BAD_FUNC_ARG;
#ifdef WOLFSSL_ALLOW_MAX_FRAGMENT_ADJUST
/* The following is a non-standard way to reconfigure the max packet size
post-handshake for wolfSSL_write/woflSSL_read */
if (ssl->options.handShakeState == HANDSHAKE_DONE) {
switch (mfl) {
case WOLFSSL_MFL_2_8 : ssl->max_fragment = 256; break;
case WOLFSSL_MFL_2_9 : ssl->max_fragment = 512; break;
case WOLFSSL_MFL_2_10: ssl->max_fragment = 1024; break;
case WOLFSSL_MFL_2_11: ssl->max_fragment = 2048; break;
case WOLFSSL_MFL_2_12: ssl->max_fragment = 4096; break;
case WOLFSSL_MFL_2_13: ssl->max_fragment = 8192; break;
default: ssl->max_fragment = MAX_RECORD_SIZE; break;
}
return WOLFSSL_SUCCESS;
}
#endif /* WOLFSSL_MAX_FRAGMENT_ADJUST */
/* This call sets the max fragment TLS extension, which gets sent to server.
The server_hello response is what sets the `ssl->max_fragment` in
TLSX_MFL_Parse */
return TLSX_UseMaxFragment(&ssl->extensions, mfl, ssl->heap); return TLSX_UseMaxFragment(&ssl->extensions, mfl, ssl->heap);
} }