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QUIC APL: Correct implementation of time callback override

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Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/21029)
This commit is contained in:
Hugo Landau 2023-05-23 12:23:06 +01:00 committed by Pauli
parent 754d2282cd
commit e3e9794aa4
3 changed files with 34 additions and 12 deletions
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9
include/internal/quic_ssl.h
View File

@ -93,12 +93,13 @@ __owur int ossl_quic_get_conn_close_info(SSL *ssl,
size_t info_len);
/*
* Used to override ossl_time_now() for debug purposes. Must be called before
* Used to override ossl_time_now() for debug purposes. While this may be
* overridden at any time, expect strange results if you change it after
* connecting.
*/
void ossl_quic_conn_set_override_now_cb(SSL *s,
OSSL_TIME (*now_cb)(void *arg),
void *now_cb_arg);
int ossl_quic_conn_set_override_now_cb(SSL *s,
OSSL_TIME (*now_cb)(void *arg),
void *now_cb_arg);
/*
* Condvar waiting in the assist thread doesn't support time faking as it relies

34
ssl/quic/quic_impl.c
View File

@ -59,6 +59,21 @@ static int block_until_pred(QUIC_CONNECTION *qc,
qc->mutex);
}
static OSSL_TIME get_time(QUIC_CONNECTION *qc)
{
if (qc->override_now_cb != NULL)
return qc->override_now_cb(qc->override_now_cb_arg);
else
return ossl_time_now();
}
static OSSL_TIME get_time_cb(void *arg)
{
QUIC_CONNECTION *qc = arg;
return get_time(qc);
}
/*
* QCTX is a utility structure which provides information we commonly wish to
* unwrap upon an API call being dispatched to us, namely:
@ -490,17 +505,22 @@ int ossl_quic_clear(SSL *s)
return 1;
}
void ossl_quic_conn_set_override_now_cb(SSL *s,
OSSL_TIME (*now_cb)(void *arg),
void *now_cb_arg)
int ossl_quic_conn_set_override_now_cb(SSL *s,
OSSL_TIME (*now_cb)(void *arg),
void *now_cb_arg)
{
QCTX ctx;
if (!expect_quic(s, &ctx))
return;
return 0;
quic_lock(ctx.qc);
ctx.qc->override_now_cb = now_cb;
ctx.qc->override_now_cb_arg = now_cb_arg;
quic_unlock(ctx.qc);
return 1;
}
void ossl_quic_conn_force_assist_thread_wake(SSL *s)
@ -889,7 +909,7 @@ int ossl_quic_get_event_timeout(SSL *s, struct timeval *tv, int *is_infinite)
return 1;
}
*tv = ossl_time_to_timeval(ossl_time_subtract(deadline, ossl_time_now()));
*tv = ossl_time_to_timeval(ossl_time_subtract(deadline, get_time(ctx.qc)));
*is_infinite = 0;
quic_unlock(ctx.qc);
return 1;
@ -1146,8 +1166,8 @@ static int create_channel(QUIC_CONNECTION *qc)
args.is_server = qc->as_server;
args.tls = qc->tls;
args.mutex = qc->mutex;
args.now_cb = qc->override_now_cb;
args.now_cb_arg = qc->override_now_cb_arg;
args.now_cb = get_time_cb;
args.now_cb_arg = qc;
qc->ch = ossl_quic_channel_new(&args);
if (qc->ch == NULL)

3
test/quic_tserver_test.c
View File

@ -165,7 +165,8 @@ static int do_test(int use_thread_assist, int use_fake_time, int use_inject)
goto err;
if (use_fake_time)
ossl_quic_conn_set_override_now_cb(c_ssl, fake_now, NULL);
if (!TEST_true(ossl_quic_conn_set_override_now_cb(c_ssl, fake_now, NULL)))
goto err;
/* 0 is a success for SSL_set_alpn_protos() */
if (!TEST_false(SSL_set_alpn_protos(c_ssl, alpn, sizeof(alpn))))