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/*
* Copyright 2022 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/common.h"
#include "internal/time.h"
#include "internal/quic_stream.h"
#include "internal/quic_sf_list.h"
#include "internal/quic_fc.h"
#include "internal/quic_error.h"
struct quic_rstream_st {
SFRAME_LIST fl;
QUIC_RXFC *rxfc;
OSSL_STATM *statm;
};
QUIC_RSTREAM *ossl_quic_rstream_new(OSSL_QRX *qrx, QUIC_RXFC *rxfc,
OSSL_STATM *statm)
{
QUIC_RSTREAM *ret = OPENSSL_malloc(sizeof(*ret));
if (ret == NULL)
return NULL;
ossl_sframe_list_init(&ret->fl, qrx);
ret->rxfc = rxfc;
ret->statm = statm;
return ret;
}
void ossl_quic_rstream_free(QUIC_RSTREAM *qrs)
{
ossl_sframe_list_destroy(&qrs->fl);
OPENSSL_free(qrs);
}
int ossl_quic_rstream_queue_data(QUIC_RSTREAM *qrs, OSSL_QRX_PKT_WRAP *pkt_wrap,
uint64_t offset,
const unsigned char *data, uint64_t data_len,
int fin)
{
UINT_RANGE range;
range.start = offset;
range.end = offset + data_len;
if (qrs->rxfc != NULL
&& (!ossl_quic_rxfc_on_rx_stream_frame(qrs->rxfc, range.end, fin)
|| ossl_quic_rxfc_get_error(qrs->rxfc, 0) != QUIC_ERR_NO_ERROR))
/* QUIC_ERR_FLOW_CONTROL_ERROR or QUIC_ERR_FINAL_SIZE detected */
return 0;
return ossl_sframe_list_insert(&qrs->fl, &range, pkt_wrap, data, fin);
}
static int read_internal(QUIC_RSTREAM *qrs, unsigned char *buf, size_t size,
size_t *readbytes, int *fin, int drop)
{
void *iter = NULL;
UINT_RANGE range;
const unsigned char *data;
uint64_t offset = 0;
size_t readbytes_ = 0;
int fin_ = 0, ret = 1;
while (ossl_sframe_list_peek(&qrs->fl, &iter, &range, &data, &fin_)) {
size_t l = (size_t)(range.end - range.start);
if (l > size)
l = size;
memcpy(buf, data, l);
offset = range.start + l;
size -= l;
buf += l;
readbytes_ += l;
if (size == 0)
break;
}
if (drop && offset != 0)
ret = ossl_sframe_list_drop_frames(&qrs->fl, offset);
if (ret) {
*readbytes = readbytes_;
*fin = fin_;
}
return ret;
}
int ossl_quic_rstream_read(QUIC_RSTREAM *qrs, unsigned char *buf, size_t size,
size_t *readbytes, int *fin)
{
OSSL_TIME rtt;
if (qrs->statm != NULL) {
OSSL_RTT_INFO rtt_info;
ossl_statm_get_rtt_info(qrs->statm, &rtt_info);
rtt = rtt_info.smoothed_rtt;
} else {
rtt = ossl_time_zero();
}
if (!read_internal(qrs, buf, size, readbytes, fin, 1))
return 0;
if (qrs->rxfc != NULL
&& !ossl_quic_rxfc_on_retire(qrs->rxfc, *readbytes, rtt))
return 0;
return 1;
}
int ossl_quic_rstream_peek(QUIC_RSTREAM *qrs, unsigned char *buf, size_t size,
size_t *readbytes, int *fin)
{
return read_internal(qrs, buf, size, readbytes, fin, 0);
}
int ossl_quic_rstream_available(QUIC_RSTREAM *qrs, size_t *avail, int *fin)
{
void *iter = NULL;
UINT_RANGE range;
const unsigned char *data;
uint64_t avail_ = 0;
while (ossl_sframe_list_peek(&qrs->fl, &iter, &range, &data, fin))
avail_ += range.end - range.start;
#if SIZE_MAX < UINT64_MAX
*avail = avail_ > SIZE_MAX ? SIZE_MAX : (size_t)avail_;
#else
*avail = (size_t)avail_;
#endif
return 1;
}
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