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curl_quiche.c
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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) Daniel Stenberg, <[email protected]>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
* SPDX-License-Identifier: curl
*
***************************************************************************/
#include "curl_setup.h"
#ifdef USE_QUICHE
#include <quiche.h>
#include <openssl/err.h>
#include <openssl/ssl.h>
#include "bufq.h"
#include "urldata.h"
#include "cfilters.h"
#include "cf-socket.h"
#include "sendf.h"
#include "strdup.h"
#include "rand.h"
#include "strcase.h"
#include "multiif.h"
#include "connect.h"
#include "progress.h"
#include "strerror.h"
#include "http1.h"
#include "vquic.h"
#include "vquic_int.h"
#include "vquic-tls.h"
#include "curl_quiche.h"
#include "transfer.h"
#include "inet_pton.h"
#include "vtls/openssl.h"
#include "vtls/keylog.h"
#include "vtls/vtls.h"
/* The last 3 #include files should be in this order */
#include "curl_printf.h"
#include "curl_memory.h"
#include "memdebug.h"
/* HTTP/3 error values defined in RFC 9114, ch. 8.1 */
#define CURL_H3_NO_ERROR (0x0100)
#define QUIC_MAX_STREAMS (100)
#define H3_STREAM_WINDOW_SIZE (128 * 1024)
#define H3_STREAM_CHUNK_SIZE (16 * 1024)
/* The pool keeps spares around and half of a full stream windows
* seems good. More does not seem to improve performance.
* The benefit of the pool is that stream buffer to not keep
* spares. So memory consumption goes down when streams run empty,
* have a large upload done, etc. */
#define H3_STREAM_POOL_SPARES \
(H3_STREAM_WINDOW_SIZE / H3_STREAM_CHUNK_SIZE ) / 2
/* Receive and Send max number of chunks just follows from the
* chunk size and window size */
#define H3_STREAM_RECV_CHUNKS \
(H3_STREAM_WINDOW_SIZE / H3_STREAM_CHUNK_SIZE)
#define H3_STREAM_SEND_CHUNKS \
(H3_STREAM_WINDOW_SIZE / H3_STREAM_CHUNK_SIZE)
/*
* Store quiche version info in this buffer.
*/
void Curl_quiche_ver(char *p, size_t len)
{
(void)msnprintf(p, len, "quiche/%s", quiche_version());
}
struct cf_quiche_ctx {
struct cf_quic_ctx q;
struct ssl_peer peer;
struct quic_tls_ctx tls;
quiche_conn *qconn;
quiche_config *cfg;
quiche_h3_conn *h3c;
quiche_h3_config *h3config;
uint8_t scid[QUICHE_MAX_CONN_ID_LEN];
struct curltime started_at; /* time the current attempt started */
struct curltime handshake_at; /* time connect handshake finished */
struct curltime reconnect_at; /* time the next attempt should start */
struct bufc_pool stream_bufcp; /* chunk pool for streams */
curl_off_t data_recvd;
uint64_t max_idle_ms; /* max idle time for QUIC conn */
BIT(goaway); /* got GOAWAY from server */
BIT(x509_store_setup); /* if x509 store has been set up */
};
#ifdef DEBUG_QUICHE
static void quiche_debug_log(const char *line, void *argp)
{
(void)argp;
fprintf(stderr, "%s\n", line);
}
#endif
static void cf_quiche_ctx_clear(struct cf_quiche_ctx *ctx)
{
if(ctx) {
if(ctx->h3c)
quiche_h3_conn_free(ctx->h3c);
if(ctx->h3config)
quiche_h3_config_free(ctx->h3config);
if(ctx->qconn)
quiche_conn_free(ctx->qconn);
if(ctx->cfg)
quiche_config_free(ctx->cfg);
/* quiche just freed ctx->tls.ssl */
ctx->tls.ssl = NULL;
Curl_vquic_tls_cleanup(&ctx->tls);
Curl_ssl_peer_cleanup(&ctx->peer);
vquic_ctx_free(&ctx->q);
Curl_bufcp_free(&ctx->stream_bufcp);
memset(ctx, 0, sizeof(*ctx));
}
}
/**
* All about the H3 internals of a stream
*/
struct stream_ctx {
int64_t id; /* HTTP/3 protocol stream identifier */
struct bufq recvbuf; /* h3 response */
struct h1_req_parser h1; /* h1 request parsing */
uint64_t error3; /* HTTP/3 stream error code */
curl_off_t upload_left; /* number of request bytes left to upload */
bool closed; /* TRUE on stream close */
bool reset; /* TRUE on stream reset */
bool send_closed; /* stream is locally closed */
bool resp_hds_complete; /* complete, final response has been received */
bool resp_got_header; /* TRUE when h3 stream has recvd some HEADER */
BIT(quic_flow_blocked); /* stream is blocked by QUIC flow control */
};
#define H3_STREAM_CTX(d) ((struct stream_ctx *)(((d) && (d)->req.p.http)? \
((struct HTTP *)(d)->req.p.http)->h3_ctx \
: NULL))
#define H3_STREAM_LCTX(d) ((struct HTTP *)(d)->req.p.http)->h3_ctx
#define H3_STREAM_ID(d) (H3_STREAM_CTX(d)? \
H3_STREAM_CTX(d)->id : -2)
static void check_resumes(struct Curl_cfilter *cf,
struct Curl_easy *data)
{
struct Curl_easy *sdata;
struct stream_ctx *stream;
DEBUGASSERT(data->multi);
for(sdata = data->multi->easyp; sdata; sdata = sdata->next) {
if(sdata->conn == data->conn) {
stream = H3_STREAM_CTX(sdata);
if(stream && stream->quic_flow_blocked) {
stream->quic_flow_blocked = FALSE;
Curl_expire(data, 0, EXPIRE_RUN_NOW);
CURL_TRC_CF(data, cf, "[%"PRId64"] unblock", stream->id);
}
}
}
}
static CURLcode h3_data_setup(struct Curl_cfilter *cf,
struct Curl_easy *data)
{
struct cf_quiche_ctx *ctx = cf->ctx;
struct stream_ctx *stream = H3_STREAM_CTX(data);
if(stream)
return CURLE_OK;
stream = calloc(1, sizeof(*stream));
if(!stream)
return CURLE_OUT_OF_MEMORY;
H3_STREAM_LCTX(data) = stream;
stream->id = -1;
Curl_bufq_initp(&stream->recvbuf, &ctx->stream_bufcp,
H3_STREAM_RECV_CHUNKS, BUFQ_OPT_SOFT_LIMIT);
Curl_h1_req_parse_init(&stream->h1, H1_PARSE_DEFAULT_MAX_LINE_LEN);
return CURLE_OK;
}
static void h3_data_done(struct Curl_cfilter *cf, struct Curl_easy *data)
{
struct cf_quiche_ctx *ctx = cf->ctx;
struct stream_ctx *stream = H3_STREAM_CTX(data);
(void)cf;
if(stream) {
CURL_TRC_CF(data, cf, "[%"PRId64"] easy handle is done", stream->id);
if(ctx->qconn && !stream->closed) {
quiche_conn_stream_shutdown(ctx->qconn, stream->id,
QUICHE_SHUTDOWN_READ, CURL_H3_NO_ERROR);
if(!stream->send_closed) {
quiche_conn_stream_shutdown(ctx->qconn, stream->id,
QUICHE_SHUTDOWN_WRITE, CURL_H3_NO_ERROR);
stream->send_closed = TRUE;
}
stream->closed = TRUE;
}
Curl_bufq_free(&stream->recvbuf);
Curl_h1_req_parse_free(&stream->h1);
free(stream);
H3_STREAM_LCTX(data) = NULL;
}
}
static void drain_stream(struct Curl_cfilter *cf,
struct Curl_easy *data)
{
struct stream_ctx *stream = H3_STREAM_CTX(data);
unsigned char bits;
(void)cf;
bits = CURL_CSELECT_IN;
if(stream && !stream->send_closed && stream->upload_left)
bits |= CURL_CSELECT_OUT;
if(data->state.select_bits != bits) {
data->state.select_bits = bits;
Curl_expire(data, 0, EXPIRE_RUN_NOW);
}
}
static struct Curl_easy *get_stream_easy(struct Curl_cfilter *cf,
struct Curl_easy *data,
int64_t stream3_id)
{
struct Curl_easy *sdata;
(void)cf;
if(H3_STREAM_ID(data) == stream3_id) {
return data;
}
else {
DEBUGASSERT(data->multi);
for(sdata = data->multi->easyp; sdata; sdata = sdata->next) {
if((sdata->conn == data->conn) && H3_STREAM_ID(sdata) == stream3_id) {
return sdata;
}
}
}
return NULL;
}
/*
* write_resp_raw() copies response data in raw format to the `data`'s
* receive buffer. If not enough space is available, it appends to the
* `data`'s overflow buffer.
*/
static CURLcode write_resp_raw(struct Curl_cfilter *cf,
struct Curl_easy *data,
const void *mem, size_t memlen)
{
struct stream_ctx *stream = H3_STREAM_CTX(data);
CURLcode result = CURLE_OK;
ssize_t nwritten;
(void)cf;
if(!stream)
return CURLE_RECV_ERROR;
nwritten = Curl_bufq_write(&stream->recvbuf, mem, memlen, &result);
if(nwritten < 0)
return result;
if((size_t)nwritten < memlen) {
/* This MUST not happen. Our recbuf is dimensioned to hold the
* full max_stream_window and then some for this very reason. */
DEBUGASSERT(0);
return CURLE_RECV_ERROR;
}
return result;
}
struct cb_ctx {
struct Curl_cfilter *cf;
struct Curl_easy *data;
};
static int cb_each_header(uint8_t *name, size_t name_len,
uint8_t *value, size_t value_len,
void *argp)
{
struct cb_ctx *x = argp;
struct stream_ctx *stream = H3_STREAM_CTX(x->data);
CURLcode result;
if(!stream)
return CURLE_OK;
if((name_len == 7) && !strncmp(HTTP_PSEUDO_STATUS, (char *)name, 7)) {
CURL_TRC_CF(x->data, x->cf, "[%" PRId64 "] status: %.*s",
stream->id, (int)value_len, value);
result = write_resp_raw(x->cf, x->data, "HTTP/3 ", sizeof("HTTP/3 ") - 1);
if(!result)
result = write_resp_raw(x->cf, x->data, value, value_len);
if(!result)
result = write_resp_raw(x->cf, x->data, " \r\n", 3);
}
else {
CURL_TRC_CF(x->data, x->cf, "[%" PRId64 "] header: %.*s: %.*s",
stream->id, (int)name_len, name,
(int)value_len, value);
result = write_resp_raw(x->cf, x->data, name, name_len);
if(!result)
result = write_resp_raw(x->cf, x->data, ": ", 2);
if(!result)
result = write_resp_raw(x->cf, x->data, value, value_len);
if(!result)
result = write_resp_raw(x->cf, x->data, "\r\n", 2);
}
if(result) {
CURL_TRC_CF(x->data, x->cf, "[%"PRId64"] on header error %d",
stream->id, result);
}
return result;
}
static ssize_t stream_resp_read(void *reader_ctx,
unsigned char *buf, size_t len,
CURLcode *err)
{
struct cb_ctx *x = reader_ctx;
struct cf_quiche_ctx *ctx = x->cf->ctx;
struct stream_ctx *stream = H3_STREAM_CTX(x->data);
ssize_t nread;
if(!stream) {
*err = CURLE_RECV_ERROR;
return -1;
}
nread = quiche_h3_recv_body(ctx->h3c, ctx->qconn, stream->id,
buf, len);
if(nread >= 0) {
*err = CURLE_OK;
return nread;
}
else {
*err = CURLE_AGAIN;
return -1;
}
}
static CURLcode cf_recv_body(struct Curl_cfilter *cf,
struct Curl_easy *data)
{
struct stream_ctx *stream = H3_STREAM_CTX(data);
ssize_t nwritten;
struct cb_ctx cb_ctx;
CURLcode result = CURLE_OK;
if(!stream)
return CURLE_RECV_ERROR;
if(!stream->resp_hds_complete) {
result = write_resp_raw(cf, data, "\r\n", 2);
if(result)
return result;
stream->resp_hds_complete = TRUE;
}
cb_ctx.cf = cf;
cb_ctx.data = data;
nwritten = Curl_bufq_slurp(&stream->recvbuf,
stream_resp_read, &cb_ctx, &result);
if(nwritten < 0 && result != CURLE_AGAIN) {
CURL_TRC_CF(data, cf, "[%"PRId64"] recv_body error %zd",
stream->id, nwritten);
failf(data, "Error %d in HTTP/3 response body for stream[%"PRId64"]",
result, stream->id);
stream->closed = TRUE;
stream->reset = TRUE;
stream->send_closed = TRUE;
streamclose(cf->conn, "Reset of stream");
return result;
}
return CURLE_OK;
}
#ifdef DEBUGBUILD
static const char *cf_ev_name(quiche_h3_event *ev)
{
switch(quiche_h3_event_type(ev)) {
case QUICHE_H3_EVENT_HEADERS:
return "HEADERS";
case QUICHE_H3_EVENT_DATA:
return "DATA";
case QUICHE_H3_EVENT_RESET:
return "RESET";
case QUICHE_H3_EVENT_FINISHED:
return "FINISHED";
case QUICHE_H3_EVENT_GOAWAY:
return "GOAWAY";
default:
return "Unknown";
}
}
#else
#define cf_ev_name(x) ""
#endif
static CURLcode h3_process_event(struct Curl_cfilter *cf,
struct Curl_easy *data,
int64_t stream3_id,
quiche_h3_event *ev)
{
struct stream_ctx *stream = H3_STREAM_CTX(data);
struct cb_ctx cb_ctx;
CURLcode result = CURLE_OK;
int rc;
if(!stream)
return CURLE_OK;
DEBUGASSERT(stream3_id == stream->id);
switch(quiche_h3_event_type(ev)) {
case QUICHE_H3_EVENT_HEADERS:
stream->resp_got_header = TRUE;
cb_ctx.cf = cf;
cb_ctx.data = data;
rc = quiche_h3_event_for_each_header(ev, cb_each_header, &cb_ctx);
if(rc) {
failf(data, "Error %d in HTTP/3 response header for stream[%"PRId64"]",
rc, stream3_id);
return CURLE_RECV_ERROR;
}
CURL_TRC_CF(data, cf, "[%"PRId64"] <- [HEADERS]", stream3_id);
break;
case QUICHE_H3_EVENT_DATA:
if(!stream->closed) {
result = cf_recv_body(cf, data);
}
break;
case QUICHE_H3_EVENT_RESET:
CURL_TRC_CF(data, cf, "[%"PRId64"] RESET", stream3_id);
stream->closed = TRUE;
stream->reset = TRUE;
stream->send_closed = TRUE;
streamclose(cf->conn, "Reset of stream");
break;
case QUICHE_H3_EVENT_FINISHED:
CURL_TRC_CF(data, cf, "[%"PRId64"] CLOSED", stream3_id);
if(!stream->resp_hds_complete) {
result = write_resp_raw(cf, data, "\r\n", 2);
if(result)
return result;
stream->resp_hds_complete = TRUE;
}
stream->closed = TRUE;
streamclose(cf->conn, "End of stream");
break;
case QUICHE_H3_EVENT_GOAWAY:
CURL_TRC_CF(data, cf, "[%"PRId64"] <- [GOAWAY]", stream3_id);
break;
default:
CURL_TRC_CF(data, cf, "[%"PRId64"] recv, unhandled event %d",
stream3_id, quiche_h3_event_type(ev));
break;
}
return result;
}
static CURLcode cf_poll_events(struct Curl_cfilter *cf,
struct Curl_easy *data)
{
struct cf_quiche_ctx *ctx = cf->ctx;
struct stream_ctx *stream = H3_STREAM_CTX(data);
struct Curl_easy *sdata;
quiche_h3_event *ev;
CURLcode result;
/* Take in the events and distribute them to the transfers. */
while(ctx->h3c) {
int64_t stream3_id = quiche_h3_conn_poll(ctx->h3c, ctx->qconn, &ev);
if(stream3_id == QUICHE_H3_ERR_DONE) {
break;
}
else if(stream3_id < 0) {
CURL_TRC_CF(data, cf, "[%"PRId64"] error poll: %"PRId64,
stream? stream->id : -1, stream3_id);
return CURLE_HTTP3;
}
sdata = get_stream_easy(cf, data, stream3_id);
if(!sdata) {
CURL_TRC_CF(data, cf, "[%"PRId64"] discard event %s for "
"unknown [%"PRId64"]",
stream? stream->id : -1, cf_ev_name(ev), stream3_id);
}
else {
result = h3_process_event(cf, sdata, stream3_id, ev);
drain_stream(cf, sdata);
if(result) {
CURL_TRC_CF(data, cf, "[%"PRId64"] error processing event %s "
"for [%"PRId64"] -> %d",
stream? stream->id : -1, cf_ev_name(ev),
stream3_id, result);
if(data == sdata) {
/* Only report this error to the caller if it is about the
* transfer we were called with. Otherwise we fail a transfer
* due to a problem in another one. */
quiche_h3_event_free(ev);
return result;
}
}
quiche_h3_event_free(ev);
}
}
return CURLE_OK;
}
struct recv_ctx {
struct Curl_cfilter *cf;
struct Curl_easy *data;
int pkts;
};
static CURLcode recv_pkt(const unsigned char *pkt, size_t pktlen,
struct sockaddr_storage *remote_addr,
socklen_t remote_addrlen, int ecn,
void *userp)
{
struct recv_ctx *r = userp;
struct cf_quiche_ctx *ctx = r->cf->ctx;
quiche_recv_info recv_info;
ssize_t nread;
(void)ecn;
++r->pkts;
recv_info.to = (struct sockaddr *)&ctx->q.local_addr;
recv_info.to_len = ctx->q.local_addrlen;
recv_info.from = (struct sockaddr *)remote_addr;
recv_info.from_len = remote_addrlen;
nread = quiche_conn_recv(ctx->qconn, (unsigned char *)pkt, pktlen,
&recv_info);
if(nread < 0) {
if(QUICHE_ERR_DONE == nread) {
CURL_TRC_CF(r->data, r->cf, "ingress, quiche is DONE");
return CURLE_OK;
}
else if(QUICHE_ERR_TLS_FAIL == nread) {
long verify_ok = SSL_get_verify_result(ctx->tls.ssl);
if(verify_ok != X509_V_OK) {
failf(r->data, "SSL certificate problem: %s",
X509_verify_cert_error_string(verify_ok));
return CURLE_PEER_FAILED_VERIFICATION;
}
}
else {
failf(r->data, "quiche_conn_recv() == %zd", nread);
return CURLE_RECV_ERROR;
}
}
else if((size_t)nread < pktlen) {
CURL_TRC_CF(r->data, r->cf, "ingress, quiche only read %zd/%zu bytes",
nread, pktlen);
}
return CURLE_OK;
}
static CURLcode cf_process_ingress(struct Curl_cfilter *cf,
struct Curl_easy *data)
{
struct cf_quiche_ctx *ctx = cf->ctx;
struct recv_ctx rctx;
CURLcode result;
DEBUGASSERT(ctx->qconn);
result = Curl_vquic_tls_before_recv(&ctx->tls, cf, data);
if(result)
return result;
rctx.cf = cf;
rctx.data = data;
rctx.pkts = 0;
result = vquic_recv_packets(cf, data, &ctx->q, 1000, recv_pkt, &rctx);
if(result)
return result;
if(rctx.pkts > 0) {
/* quiche digested ingress packets. It might have opened flow control
* windows again. */
check_resumes(cf, data);
}
return cf_poll_events(cf, data);
}
struct read_ctx {
struct Curl_cfilter *cf;
struct Curl_easy *data;
quiche_send_info send_info;
};
static ssize_t read_pkt_to_send(void *userp,
unsigned char *buf, size_t buflen,
CURLcode *err)
{
struct read_ctx *x = userp;
struct cf_quiche_ctx *ctx = x->cf->ctx;
ssize_t nwritten;
nwritten = quiche_conn_send(ctx->qconn, buf, buflen, &x->send_info);
if(nwritten == QUICHE_ERR_DONE) {
*err = CURLE_AGAIN;
return -1;
}
if(nwritten < 0) {
failf(x->data, "quiche_conn_send returned %zd", nwritten);
*err = CURLE_SEND_ERROR;
return -1;
}
*err = CURLE_OK;
return nwritten;
}
/*
* flush_egress drains the buffers and sends off data.
* Calls failf() on errors.
*/
static CURLcode cf_flush_egress(struct Curl_cfilter *cf,
struct Curl_easy *data)
{
struct cf_quiche_ctx *ctx = cf->ctx;
ssize_t nread;
CURLcode result;
int64_t expiry_ns;
int64_t timeout_ns;
struct read_ctx readx;
size_t pkt_count, gsolen;
expiry_ns = quiche_conn_timeout_as_nanos(ctx->qconn);
if(!expiry_ns) {
quiche_conn_on_timeout(ctx->qconn);
if(quiche_conn_is_closed(ctx->qconn)) {
failf(data, "quiche_conn_on_timeout closed the connection");
return CURLE_SEND_ERROR;
}
}
result = vquic_flush(cf, data, &ctx->q);
if(result) {
if(result == CURLE_AGAIN) {
Curl_expire(data, 1, EXPIRE_QUIC);
return CURLE_OK;
}
return result;
}
readx.cf = cf;
readx.data = data;
memset(&readx.send_info, 0, sizeof(readx.send_info));
pkt_count = 0;
gsolen = quiche_conn_max_send_udp_payload_size(ctx->qconn);
for(;;) {
/* add the next packet to send, if any, to our buffer */
nread = Curl_bufq_sipn(&ctx->q.sendbuf, 0,
read_pkt_to_send, &readx, &result);
if(nread < 0) {
if(result != CURLE_AGAIN)
return result;
/* Nothing more to add, flush and leave */
result = vquic_send(cf, data, &ctx->q, gsolen);
if(result) {
if(result == CURLE_AGAIN) {
Curl_expire(data, 1, EXPIRE_QUIC);
return CURLE_OK;
}
return result;
}
goto out;
}
++pkt_count;
if((size_t)nread < gsolen || pkt_count >= MAX_PKT_BURST) {
result = vquic_send(cf, data, &ctx->q, gsolen);
if(result) {
if(result == CURLE_AGAIN) {
Curl_expire(data, 1, EXPIRE_QUIC);
return CURLE_OK;
}
goto out;
}
pkt_count = 0;
}
}
out:
timeout_ns = quiche_conn_timeout_as_nanos(ctx->qconn);
if(timeout_ns % 1000000)
timeout_ns += 1000000;
/* expire resolution is milliseconds */
Curl_expire(data, (timeout_ns / 1000000), EXPIRE_QUIC);
return result;
}
static ssize_t recv_closed_stream(struct Curl_cfilter *cf,
struct Curl_easy *data,
CURLcode *err)
{
struct stream_ctx *stream = H3_STREAM_CTX(data);
ssize_t nread = -1;
DEBUGASSERT(stream);
if(stream->reset) {
failf(data,
"HTTP/3 stream %" PRId64 " reset by server", stream->id);
*err = stream->resp_got_header? CURLE_PARTIAL_FILE : CURLE_HTTP3;
CURL_TRC_CF(data, cf, "[%" PRId64 "] cf_recv, was reset -> %d",
stream->id, *err);
}
else if(!stream->resp_got_header) {
failf(data,
"HTTP/3 stream %" PRId64 " was closed cleanly, but before getting"
" all response header fields, treated as error",
stream->id);
/* *err = CURLE_PARTIAL_FILE; */
*err = CURLE_HTTP3;
CURL_TRC_CF(data, cf, "[%" PRId64 "] cf_recv, closed incomplete"
" -> %d", stream->id, *err);
}
else {
*err = CURLE_OK;
nread = 0;
}
return nread;
}
static ssize_t cf_quiche_recv(struct Curl_cfilter *cf, struct Curl_easy *data,
char *buf, size_t len, CURLcode *err)
{
struct cf_quiche_ctx *ctx = cf->ctx;
struct stream_ctx *stream = H3_STREAM_CTX(data);
ssize_t nread = -1;
CURLcode result;
vquic_ctx_update_time(&ctx->q);
if(!stream) {
*err = CURLE_RECV_ERROR;
return -1;
}
if(!Curl_bufq_is_empty(&stream->recvbuf)) {
nread = Curl_bufq_read(&stream->recvbuf,
(unsigned char *)buf, len, err);
CURL_TRC_CF(data, cf, "[%" PRId64 "] read recvbuf(len=%zu) "
"-> %zd, %d", stream->id, len, nread, *err);
if(nread < 0)
goto out;
}
if(cf_process_ingress(cf, data)) {
CURL_TRC_CF(data, cf, "cf_recv, error on ingress");
*err = CURLE_RECV_ERROR;
nread = -1;
goto out;
}
/* recvbuf had nothing before, maybe after progressing ingress? */
if(nread < 0 && !Curl_bufq_is_empty(&stream->recvbuf)) {
nread = Curl_bufq_read(&stream->recvbuf,
(unsigned char *)buf, len, err);
CURL_TRC_CF(data, cf, "[%" PRId64 "] read recvbuf(len=%zu) "
"-> %zd, %d", stream->id, len, nread, *err);
if(nread < 0)
goto out;
}
if(nread > 0) {
if(stream->closed)
drain_stream(cf, data);
}
else {
if(stream->closed) {
nread = recv_closed_stream(cf, data, err);
goto out;
}
else if(quiche_conn_is_draining(ctx->qconn)) {
failf(data, "QUIC connection is draining");
*err = CURLE_HTTP3;
nread = -1;
goto out;
}
*err = CURLE_AGAIN;
nread = -1;
}
out:
result = cf_flush_egress(cf, data);
if(result) {
CURL_TRC_CF(data, cf, "cf_recv, flush egress failed");
*err = result;
nread = -1;
}
if(nread > 0)
ctx->data_recvd += nread;
CURL_TRC_CF(data, cf, "[%"PRId64"] cf_recv(total=%"
CURL_FORMAT_CURL_OFF_T ") -> %zd, %d",
stream->id, ctx->data_recvd, nread, *err);
return nread;
}
/* Index where :authority header field will appear in request header
field list. */
#define AUTHORITY_DST_IDX 3
static ssize_t h3_open_stream(struct Curl_cfilter *cf,
struct Curl_easy *data,
const void *buf, size_t len,
CURLcode *err)
{
struct cf_quiche_ctx *ctx = cf->ctx;
struct stream_ctx *stream = H3_STREAM_CTX(data);
size_t nheader, i;
int64_t stream3_id;
struct dynhds h2_headers;
quiche_h3_header *nva = NULL;
ssize_t nwritten;
if(!stream) {
*err = h3_data_setup(cf, data);
if(*err) {
return -1;
}
stream = H3_STREAM_CTX(data);
DEBUGASSERT(stream);
}
Curl_dynhds_init(&h2_headers, 0, DYN_HTTP_REQUEST);
DEBUGASSERT(stream);
nwritten = Curl_h1_req_parse_read(&stream->h1, buf, len, NULL, 0, err);
if(nwritten < 0)
goto out;
if(!stream->h1.done) {
/* need more data */
goto out;
}
DEBUGASSERT(stream->h1.req);
*err = Curl_http_req_to_h2(&h2_headers, stream->h1.req, data);
if(*err) {
nwritten = -1;
goto out;
}
/* no longer needed */
Curl_h1_req_parse_free(&stream->h1);
nheader = Curl_dynhds_count(&h2_headers);
nva = malloc(sizeof(quiche_h3_header) * nheader);
if(!nva) {
*err = CURLE_OUT_OF_MEMORY;
nwritten = -1;
goto out;
}
for(i = 0; i < nheader; ++i) {
struct dynhds_entry *e = Curl_dynhds_getn(&h2_headers, i);
nva[i].name = (unsigned char *)e->name;
nva[i].name_len = e->namelen;
nva[i].value = (unsigned char *)e->value;
nva[i].value_len = e->valuelen;
}
switch(data->state.httpreq) {
case HTTPREQ_POST:
case HTTPREQ_POST_FORM:
case HTTPREQ_POST_MIME:
case HTTPREQ_PUT:
if(data->state.infilesize != -1)
stream->upload_left = data->state.infilesize;
else
/* data sending without specifying the data amount up front */
stream->upload_left = -1; /* unknown */
break;
default:
stream->upload_left = 0; /* no request body */
break;
}
if(stream->upload_left == 0)
stream->send_closed = TRUE;
stream3_id = quiche_h3_send_request(ctx->h3c, ctx->qconn, nva, nheader,
stream->send_closed);
if(stream3_id < 0) {
if(QUICHE_H3_ERR_STREAM_BLOCKED == stream3_id) {
/* quiche seems to report this error if the connection window is
* exhausted. Which happens frequently and intermittent. */
CURL_TRC_CF(data, cf, "[%"PRId64"] blocked", stream->id);
stream->quic_flow_blocked = TRUE;
*err = CURLE_AGAIN;
nwritten = -1;
goto out;
}
else {
CURL_TRC_CF(data, cf, "send_request(%s) -> %" PRId64,
data->state.url, stream3_id);
}
*err = CURLE_SEND_ERROR;
nwritten = -1;
goto out;
}
DEBUGASSERT(stream->id == -1);
*err = CURLE_OK;
stream->id = stream3_id;
stream->closed = FALSE;
stream->reset = FALSE;
if(Curl_trc_is_verbose(data)) {
infof(data, "[HTTP/3] [%" PRId64 "] OPENED stream for %s",
stream->id, data->state.url);
for(i = 0; i < nheader; ++i) {
infof(data, "[HTTP/3] [%" PRId64 "] [%.*s: %.*s]", stream->id,
(int)nva[i].name_len, nva[i].name,
(int)nva[i].value_len, nva[i].value);
}
}
out:
free(nva);
Curl_dynhds_free(&h2_headers);
return nwritten;
}
static ssize_t cf_quiche_send(struct Curl_cfilter *cf, struct Curl_easy *data,
const void *buf, size_t len, CURLcode *err)
{
struct cf_quiche_ctx *ctx = cf->ctx;
struct stream_ctx *stream = H3_STREAM_CTX(data);
CURLcode result;
ssize_t nwritten;
vquic_ctx_update_time(&ctx->q);
*err = cf_process_ingress(cf, data);
if(*err) {
nwritten = -1;
goto out;
}
if(!stream || stream->id < 0) {
nwritten = h3_open_stream(cf, data, buf, len, err);
if(nwritten < 0)
goto out;
stream = H3_STREAM_CTX(data);
}
else if(stream->closed) {
if(stream->resp_hds_complete) {
/* sending request body on a stream that has been closed by the
* server. If the server has send us a final response, we should
* silently discard the send data.
* This happens for example on redirects where the server, instead
* of reading the full request body just closed the stream after
* sending the 30x response.
* This is sort of a race: had the transfer loop called recv first,
* it would see the response and stop/discard sending on its own- */
CURL_TRC_CF(data, cf, "[%" PRId64 "] discarding data"
"on closed stream with response", stream->id);
*err = CURLE_OK;
nwritten = (ssize_t)len;
goto out;
}
CURL_TRC_CF(data, cf, "[%" PRId64 "] send_body(len=%zu) "
"-> stream closed", stream->id, len);
*err = CURLE_HTTP3;
nwritten = -1;
goto out;
}
else {
bool eof = (stream->upload_left >= 0 &&