openssl/ssl/quic/quic_port.c

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/*
* Copyright 2023 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include "internal/quic_port.h"
#include "internal/quic_channel.h"
#include "quic_port_local.h"
#include "quic_channel_local.h"
#include "../ssl_local.h"
/*
* QUIC Port Structure
* ===================
*/
static int port_init(QUIC_PORT *port);
static void port_cleanup(QUIC_PORT *port);
static OSSL_TIME get_time(void *arg);
static void port_tick(QUIC_TICK_RESULT *res, void *arg, uint32_t flags);
//static void port_default_packet_handler(QUIC_URXE *e, void *arg);
DEFINE_LIST_OF_IMPL(ch, QUIC_CHANNEL);
QUIC_PORT *ossl_quic_port_new(const QUIC_PORT_ARGS *args)
{
QUIC_PORT *port;
if ((port = OPENSSL_zalloc(sizeof(QUIC_PORT))) == NULL)
return NULL;
port->libctx = args->libctx;
port->propq = args->propq;
port->mutex = args->mutex;
port->now_cb = args->now_cb;
port->now_cb_arg = args->now_cb_arg;
port->channel_ctx = args->channel_ctx;
if (!port_init(port)) {
OPENSSL_free(port);
return NULL;
}
return port;
}
void ossl_quic_port_free(QUIC_PORT *port)
{
if (port == NULL)
return;
port_cleanup(port);
OPENSSL_free(port);
}
static int port_init(QUIC_PORT *port)
{
size_t rx_short_cid_len = 8;
if (port->channel_ctx == NULL)
goto err;
if ((port->demux = ossl_quic_demux_new(/*BIO=*/NULL,
/*Short CID Len=*/rx_short_cid_len,
get_time, port)) == NULL)
goto err;
/*
* If we are a server, setup our handler for packets not corresponding to
* any known DCID on our end. This is for handling clients establishing new
* connections.
*/
// if (is_server)
//ossl_quic_demux_set_default_handler(port->demux,
// port_default_packet_handler,
// port);
ossl_quic_reactor_init(&port->rtor, port_tick, port, ossl_time_zero());
return 1;
err:
port_cleanup(port);
return 0;
}
static void port_cleanup(QUIC_PORT *port)
{
assert(ossl_list_ch_num(&port->channel_list) == 0);
ossl_quic_demux_free(port->demux);
port->demux = NULL;
}
QUIC_REACTOR *ossl_quic_port_get0_reactor(QUIC_PORT *port)
{
return &port->rtor;
}
QUIC_DEMUX *ossl_quic_port_get0_demux(QUIC_PORT *port)
{
return port->demux;
}
CRYPTO_MUTEX *ossl_quic_port_get0_mutex(QUIC_PORT *port)
{
return port->mutex;
}
OSSL_TIME ossl_quic_port_get_time(QUIC_PORT *port)
{
if (port->now_cb == NULL)
return ossl_time_now();
return port->now_cb(port->now_cb_arg);
}
static OSSL_TIME get_time(void *port)
{
return ossl_quic_port_get_time(port);
}
/*
* QUIC Port: Network BIO Configuration
* ====================================
*/
/* Determines whether we can support a given poll descriptor. */
static int validate_poll_descriptor(const BIO_POLL_DESCRIPTOR *d)
{
if (d->type == BIO_POLL_DESCRIPTOR_TYPE_SOCK_FD && d->value.fd < 0) {
ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT);
return 0;
}
return 1;
}
BIO *ossl_quic_port_get_net_rbio(QUIC_PORT *port)
{
return port->net_rbio;
}
BIO *ossl_quic_port_get_net_wbio(QUIC_PORT *port)
{
return port->net_wbio;
}
static int port_update_poll_desc(QUIC_PORT *port, BIO *net_bio, int for_write)
{
BIO_POLL_DESCRIPTOR d = {0};
if (net_bio == NULL
|| (!for_write && !BIO_get_rpoll_descriptor(net_bio, &d))
|| (for_write && !BIO_get_wpoll_descriptor(net_bio, &d)))
/* Non-pollable BIO */
d.type = BIO_POLL_DESCRIPTOR_TYPE_NONE;
if (!validate_poll_descriptor(&d))
return 0;
if (for_write)
ossl_quic_reactor_set_poll_w(&port->rtor, &d);
else
ossl_quic_reactor_set_poll_r(&port->rtor, &d);
return 1;
}
int ossl_quic_port_update_poll_descriptors(QUIC_PORT *port)
{
int ok = 1;
if (!port_update_poll_desc(port, port->net_rbio, /*for_write=*/0))
ok = 0;
if (!port_update_poll_desc(port, port->net_wbio, /*for_write=*/1))
ok = 0;
return ok;
}
/*
* QUIC_PORT does not ref any BIO it is provided with, nor is any ref
* transferred to it. The caller (e.g., QUIC_CONNECTION) is responsible for
* ensuring the BIO lasts until the channel is freed or the BIO is switched out
* for another BIO by a subsequent successful call to this function.
*/
int ossl_quic_port_set_net_rbio(QUIC_PORT *port, BIO *net_rbio)
{
if (port->net_rbio == net_rbio)
return 1;
if (!port_update_poll_desc(port, net_rbio, /*for_write=*/0))
return 0;
ossl_quic_demux_set_bio(port->demux, net_rbio);
port->net_rbio = net_rbio;
return 1;
}
int ossl_quic_port_set_net_wbio(QUIC_PORT *port, BIO *net_wbio)
{
if (port->net_wbio == net_wbio)
return 1;
if (!port_update_poll_desc(port, net_wbio, /*for_write=*/1))
return 0;
//ossl_qtx_set_bio(port->qtx, net_wbio);
port->net_wbio = net_wbio;
return 1;
}
/*
* QUIC Port: Channel Lifecycle
* ============================
*/
static SSL *port_new_handshake_layer(QUIC_PORT *port)
{
SSL *tls = NULL;
SSL_CONNECTION *tls_conn = NULL;
tls = ossl_ssl_connection_new_int(port->channel_ctx, TLS_method());
if (tls == NULL || (tls_conn = SSL_CONNECTION_FROM_SSL(tls)) == NULL)
return NULL;
/* Override the user_ssl of the inner connection. */
tls_conn->s3.flags |= TLS1_FLAGS_QUIC;
/* Restrict options derived from the SSL_CTX. */
tls_conn->options &= OSSL_QUIC_PERMITTED_OPTIONS_CONN;
tls_conn->pha_enabled = 0;
return tls;
}
static QUIC_CHANNEL *port_make_channel(QUIC_PORT *port, SSL *tls, int is_server)
{
QUIC_CHANNEL_ARGS args = {0};
QUIC_CHANNEL *ch;
args.port = port;
args.is_server = is_server;
args.tls = (tls != NULL ? tls : port_new_handshake_layer(port));
if (args.tls == NULL)
return NULL;
ch = ossl_quic_channel_new(&args);
if (ch == NULL) {
if (tls == NULL)
SSL_free(args.tls);
return NULL;
}
return ch;
}
QUIC_CHANNEL *ossl_quic_port_create_outgoing(QUIC_PORT *port, SSL *tls)
{
return port_make_channel(port, tls, /*is_server=*/0);
}
QUIC_CHANNEL *ossl_quic_port_create_incoming(QUIC_PORT *port, SSL *tls)
{
return port_make_channel(port, tls, /*is_server=*/1);
}
/*
* QUIC Port: Ticker-Mutator
* =========================
*/
/*
* The central ticker function called by the reactor. This does everything, or
* at least everything network I/O related. Best effort - not allowed to fail
* "loudly".
*/
static void port_tick(QUIC_TICK_RESULT *res, void *arg, uint32_t flags)
{
/* TODO */
}