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mod_ssl: follow up to r1705823.

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Flush SSL/TLS handshake data when writing (instead of before reading),
and only when necessary (openssl < 0.9.8m or proxy/client side).


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1707230 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Yann Ylavic
2015-10-07 10:38:53 +00:00
parent cf173c7980
commit dd73e48d20
1 changed files with 21 additions and 22 deletions
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43
modules/ssl/ssl_engine_io.c
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@@ -196,6 +196,7 @@ static int bio_filter_out_write(BIO *bio, const char *in, int inl)
{
bio_filter_out_ctx_t *outctx = (bio_filter_out_ctx_t *)(bio->ptr);
apr_bucket *e;
int need_flush;
/* Abort early if the client has initiated a renegotiation. */
if (outctx->filter_ctx->config->reneg_state == RENEG_ABORT) {
@@ -214,6 +215,26 @@ static int bio_filter_out_write(BIO *bio, const char *in, int inl)
e = apr_bucket_transient_create(in, inl, outctx->bb->bucket_alloc);
APR_BRIGADE_INSERT_TAIL(outctx->bb, e);
/* In theory, OpenSSL should flush as necessary, but it is known
* not to do so correctly in some cases (< 0.9.8m; see PR 46952),
* or on the proxy/client side (after ssl23_client_hello(), e.g.
* ssl/proxy.t test suite).
*
* Historically, this flush call was performed only for an SSLv2
* connection or for a proxy connection. Calling _out_flush can
* be expensive in cases where requests/reponses are pipelined,
* so limit the performance impact to handshake time.
*/
#if OPENSSL_VERSION_NUMBER < 0x0009080df
need_flush = !SSL_is_init_finished(outctx->filter_ctx->pssl)
#else
need_flush = !SSL_in_connect_init(outctx->filter_ctx->pssl);
#endif
if (need_flush) {
e = apr_bucket_flush_create(outctx->bb->bucket_alloc);
APR_BRIGADE_INSERT_TAIL(outctx->bb, e);
}
if (bio_filter_out_pass(outctx) < 0) {
return -1;
}
@@ -452,7 +473,6 @@ static int bio_filter_in_read(BIO *bio, char *in, int inlen)
apr_size_t inl = inlen;
bio_filter_in_ctx_t *inctx = (bio_filter_in_ctx_t *)(bio->ptr);
apr_read_type_e block = inctx->block;
int need_flush;
inctx->rc = APR_SUCCESS;
@@ -466,27 +486,6 @@ static int bio_filter_in_read(BIO *bio, char *in, int inlen)
return -1;
}
/* In theory, OpenSSL should flush as necessary, but it is known
* not to do so correctly in some cases (< 0.9.8m; see PR 46952),
* or on the proxy/client side (after ssl23_client_hello(), e.g.
* ssl/proxy.t test suite).
*
* Historically, this flush call was performed only for an SSLv2
* connection or for a proxy connection. Calling _out_flush can
* be expensive in cases where requests/reponses are pipelined,
* so limit the performance impact to handshake time.
*/
#if OPENSSL_VERSION_NUMBER < 0x0009080df
need_flush = 1;
#else
need_flush = !SSL_is_init_finished(inctx->ssl);
#endif
if (need_flush && bio_filter_out_flush(inctx->bio_out) < 0) {
bio_filter_out_ctx_t *outctx = inctx->bio_out->ptr;
inctx->rc = outctx->rc;
return -1;
}
BIO_clear_retry_flags(bio);
if (!inctx->bb) {