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add send packet size calculator

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This commit is contained in:
Me No Dev
2016-08-27 18:47:02 +03:00
parent d26f23a1ce
commit 23d532ae2d
2 changed files with 38 additions and 0 deletions
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29
ssl/tls1.c
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@ -315,6 +315,35 @@ EXP_FUNC int STDCALL ssl_write(SSL *ssl, const uint8_t *out_data, int out_len)
return out_len;
}
EXP_FUNC int STDCALL ssl_calculate_write_length(SSL *ssl, int length)
{
int msg_length = 0;
if (ssl->hs_status == SSL_ERROR_DEAD)
return SSL_ERROR_CONN_LOST;
if (ssl->flag & SSL_SENT_CLOSE_NOTIFY)
return SSL_CLOSE_NOTIFY;
msg_length += length;
if (ssl->flag & SSL_TX_ENCRYPTED)
{
msg_length += ssl->cipher_info->digest_size;
{
int last_blk_size = msg_length%ssl->cipher_info->padding_size;
int pad_bytes = ssl->cipher_info->padding_size - last_blk_size;
if (pad_bytes == 0)
pad_bytes += ssl->cipher_info->padding_size;
msg_length += pad_bytes;
}
if (ssl->version >= SSL_PROTOCOL_VERSION_TLS1_1)
{
msg_length += ssl->cipher_info->iv_size;
}
}
return SSL_RECORD_SIZE+msg_length;
}
/**
* Add a certificate to the certificate chain.
*/