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59a5fd8518f6136494d04f694e16cd8879f03730
curl/lib/vquic/curl_quiche.c
Viktor Szakats 59a5fd8518 build: drop redundant unused variable suppressions 
Also:
- digest_sspi: merge some `ifdef`s.

Closes #20310
2026-01-14 10:38:34 +01:00

1663 lines
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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) Daniel Stenberg, <daniel@haxx.se>, 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"
#if !defined(CURL_DISABLE_HTTP) && defined(USE_QUICHE)
#include <quiche.h>
#include <openssl/err.h>
#include <openssl/ssl.h>
#include "../bufq.h"
#include "../uint-hash.h"
#include "../urldata.h"
#include "../cfilters.h"
#include "../cf-socket.h"
#include "../curl_trc.h"
#include "../rand.h"
#include "../multiif.h"
#include "../connect.h"
#include "../progress.h"
#include "../select.h"
#include "../http1.h"
#include "vquic.h"
#include "vquic_int.h"
#include "vquic-tls.h"
#include "curl_quiche.h"
#include "../transfer.h"
#include "../url.h"
#include "../bufref.h"
#include "../vtls/openssl.h"
#include "../vtls/keylog.h"
#include "../vtls/vtls.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. 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)
/*
* Store quiche version info in this buffer.
*/
void Curl_quiche_ver(char *p, size_t len)
{
(void)curl_msnprintf(p, len, "quiche/%s", quiche_version());
}
struct cf_quiche_ctx {
struct cf_quic_ctx q;
struct ssl_peer peer;
struct curl_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 uint_hash streams; /* hash `data->mid` to `stream_ctx` */
struct dynbuf h1hdr; /* temp buffer for header construction */
struct bufq writebuf; /* temp buffer for writing bodies */
curl_off_t data_recvd;
BIT(initialized);
BIT(goaway); /* got GOAWAY from server */
BIT(x509_store_setup); /* if x509 store has been set up */
BIT(shutdown_started); /* queued shutdown packets */
};
#ifdef DEBUG_QUICHE
/* initialize debug log callback only once */
static int debug_log_init = 0;
static void quiche_debug_log(const char *line, void *argp)
{
(void)argp;
curl_mfprintf(stderr, "%s\n", line);
}
#endif
static void h3_stream_hash_free(unsigned int id, void *stream);
static void cf_quiche_ctx_init(struct cf_quiche_ctx *ctx)
{
DEBUGASSERT(!ctx->initialized);
#ifdef DEBUG_QUICHE
if(!debug_log_init) {
quiche_enable_debug_logging(quiche_debug_log, NULL);
debug_log_init = 1;
}
#endif
curlx_dyn_init(&ctx->h1hdr, CURL_MAX_HTTP_HEADER);
Curl_uint32_hash_init(&ctx->streams, 63, h3_stream_hash_free);
Curl_bufq_init2(&ctx->writebuf, H3_STREAM_CHUNK_SIZE, H3_STREAM_RECV_CHUNKS,
BUFQ_OPT_SOFT_LIMIT);
ctx->data_recvd = 0;
ctx->initialized = TRUE;
}
static void cf_quiche_ctx_free(struct cf_quiche_ctx *ctx)
{
if(ctx && ctx->initialized) {
/* quiche just freed it */
ctx->tls.ossl.ssl = NULL;
Curl_vquic_tls_cleanup(&ctx->tls);
Curl_ssl_peer_cleanup(&ctx->peer);
vquic_ctx_free(&ctx->q);
Curl_uint32_hash_destroy(&ctx->streams);
curlx_dyn_free(&ctx->h1hdr);
Curl_bufq_free(&ctx->writebuf);
}
curlx_free(ctx);
}
static void cf_quiche_ctx_close(struct cf_quiche_ctx *ctx)
{
if(ctx->h3c) {
quiche_h3_conn_free(ctx->h3c);
ctx->h3c = NULL;
}
if(ctx->h3config) {
quiche_h3_config_free(ctx->h3config);
ctx->h3config = NULL;
}
if(ctx->qconn) {
quiche_conn_free(ctx->qconn);
ctx->qconn = NULL;
}
if(ctx->cfg) {
quiche_config_free(ctx->cfg);
ctx->cfg = NULL;
}
}
static CURLcode cf_flush_egress(struct Curl_cfilter *cf,
struct Curl_easy *data);
/**
* All about the H3 internals of a stream
*/
struct h3_stream_ctx {
uint64_t id; /* HTTP/3 protocol stream identifier */
struct h1_req_parser h1; /* h1 request parsing */
uint64_t error3; /* HTTP/3 stream error code */
int status_code; /* HTTP status code */
CURLcode xfer_result; /* result from cf_quiche_write_(hd/body) */
BIT(opened); /* TRUE after stream has been opened */
BIT(closed); /* TRUE on stream close */
BIT(reset); /* TRUE on stream reset */
BIT(send_closed); /* stream is locally closed */
BIT(resp_hds_complete); /* final response has been received */
BIT(resp_got_header); /* TRUE when h3 stream has recvd some HEADER */
BIT(quic_flow_blocked); /* stream is blocked by QUIC flow control */
};
static void h3_stream_ctx_free(struct h3_stream_ctx *stream)
{
Curl_h1_req_parse_free(&stream->h1);
curlx_free(stream);
}
static void h3_stream_hash_free(unsigned int id, void *stream)
{
(void)id;
DEBUGASSERT(stream);
h3_stream_ctx_free((struct h3_stream_ctx *)stream);
}
typedef bool cf_quiche_svisit(struct Curl_cfilter *cf,
struct Curl_easy *sdata,
struct h3_stream_ctx *stream,
void *user_data);
struct cf_quiche_visit_ctx {
struct Curl_cfilter *cf;
struct Curl_multi *multi;
cf_quiche_svisit *cb;
void *user_data;
};
static bool cf_quiche_stream_do(uint32_t mid, void *val, void *user_data)
{
struct cf_quiche_visit_ctx *vctx = user_data;
struct h3_stream_ctx *stream = val;
struct Curl_easy *sdata = Curl_multi_get_easy(vctx->multi, mid);
if(sdata)
return vctx->cb(vctx->cf, sdata, stream, vctx->user_data);
return TRUE;
}
static void cf_quiche_for_all_streams(struct Curl_cfilter *cf,
struct Curl_multi *multi,
cf_quiche_svisit *do_cb,
void *user_data)
{
struct cf_quiche_ctx *ctx = cf->ctx;
struct cf_quiche_visit_ctx vctx;
vctx.cf = cf;
vctx.multi = multi;
vctx.cb = do_cb;
vctx.user_data = user_data;
Curl_uint32_hash_visit(&ctx->streams, cf_quiche_stream_do, &vctx);
}
static bool cf_quiche_do_resume(struct Curl_cfilter *cf,
struct Curl_easy *sdata,
struct h3_stream_ctx *stream,
void *user_data)
{
(void)user_data;
if(stream->quic_flow_blocked) {
stream->quic_flow_blocked = FALSE;
Curl_multi_mark_dirty(sdata);
CURL_TRC_CF(sdata, cf, "[%" PRIu64 "] unblock", stream->id);
}
return TRUE;
}
static bool cf_quiche_do_expire(struct Curl_cfilter *cf,
struct Curl_easy *sdata,
struct h3_stream_ctx *stream,
void *user_data)
{
(void)stream;
(void)user_data;
CURL_TRC_CF(sdata, cf, "conn closed, mark as dirty");
stream->xfer_result = CURLE_SEND_ERROR;
Curl_multi_mark_dirty(sdata);
return TRUE;
}
static CURLcode h3_data_setup(struct Curl_cfilter *cf,
struct Curl_easy *data)
{
struct cf_quiche_ctx *ctx = cf->ctx;
struct h3_stream_ctx *stream = H3_STREAM_CTX(ctx, data);
if(stream)
return CURLE_OK;
stream = curlx_calloc(1, sizeof(*stream));
if(!stream)
return CURLE_OUT_OF_MEMORY;
stream->id = -1;
Curl_h1_req_parse_init(&stream->h1, H1_PARSE_DEFAULT_MAX_LINE_LEN);
if(!Curl_uint32_hash_set(&ctx->streams, data->mid, stream)) {
h3_stream_ctx_free(stream);
return CURLE_OUT_OF_MEMORY;
}
return CURLE_OK;
}
static void cf_quiche_stream_close(struct Curl_cfilter *cf,
struct Curl_easy *data,
struct h3_stream_ctx *stream)
{
struct cf_quiche_ctx *ctx = cf->ctx;
CURLcode result;
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;
result = cf_flush_egress(cf, data);
if(result)
CURL_TRC_CF(data, cf, "[%" PRIu64 "] stream close, flush egress -> %d",
stream->id, result);
}
}
static void h3_data_done(struct Curl_cfilter *cf, struct Curl_easy *data)
{
struct cf_quiche_ctx *ctx = cf->ctx;
struct h3_stream_ctx *stream = H3_STREAM_CTX(ctx, data);
(void)cf;
if(stream) {
CURL_TRC_CF(data, cf, "[%" PRIu64 "] easy handle is done", stream->id);
cf_quiche_stream_close(cf, data, stream);
Curl_uint32_hash_remove(&ctx->streams, data->mid);
}
}
static void cf_quiche_expire_conn_closed(struct Curl_cfilter *cf,
struct Curl_easy *data)
{
DEBUGASSERT(data->multi);
CURL_TRC_CF(data, cf, "conn closed, expire all transfers");
cf_quiche_for_all_streams(cf, data->multi, cf_quiche_do_expire, NULL);
}
static void cf_quiche_write_hd(struct Curl_cfilter *cf,
struct Curl_easy *data,
struct h3_stream_ctx *stream,
const char *buf, size_t blen, bool eos)
{
/* This function returns no error intentionally, but records
* the result at the stream, skipping further writes once the
* `result` of the transfer is known.
* The stream is subsequently cancelled "higher up" in the filter's
* send/recv callbacks. Closing the stream here leads to SEND/RECV
* errors in other places that then overwrite the transfer's result. */
if(!stream->xfer_result) {
stream->xfer_result = Curl_xfer_write_resp_hd(data, buf, blen, eos);
if(stream->xfer_result)
CURL_TRC_CF(data, cf, "[%" PRId64 "] error %d writing %zu "
"bytes of headers", stream->id, stream->xfer_result, blen);
}
}
struct cb_ctx {
struct Curl_cfilter *cf;
struct Curl_easy *data;
struct h3_stream_ctx *stream;
};
static bool is_valid_h3_header(const uint8_t *hdr, size_t hlen)
{
while(hlen--) {
switch(*hdr++) {
case '\n':
case '\r':
case '\0':
return FALSE;
}
}
return TRUE;
}
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 Curl_cfilter *cf = x->cf;
struct Curl_easy *data = x->data;
struct h3_stream_ctx *stream = x->stream;
struct cf_quiche_ctx *ctx = cf->ctx;
CURLcode result = CURLE_OK;
if(!stream || stream->xfer_result)
return 1; /* abort iteration */
if((name_len == 7) && !strncmp(HTTP_PSEUDO_STATUS, (char *)name, 7) &&
is_valid_h3_header(value, value_len)) {
curlx_dyn_reset(&ctx->h1hdr);
result = Curl_http_decode_status(&stream->status_code,
(const char *)value, value_len);
if(!result)
result = curlx_dyn_addn(&ctx->h1hdr, STRCONST("HTTP/3 "));
if(!result)
result = curlx_dyn_addn(&ctx->h1hdr, (const char *)value, value_len);
if(!result)
result = curlx_dyn_addn(&ctx->h1hdr, STRCONST(" \r\n"));
if(!result)
cf_quiche_write_hd(cf, data, stream, curlx_dyn_ptr(&ctx->h1hdr),
curlx_dyn_len(&ctx->h1hdr), FALSE);
CURL_TRC_CF(data, cf, "[%" PRId64 "] status: %s",
stream->id, curlx_dyn_ptr(&ctx->h1hdr));
}
else {
if(is_valid_h3_header(value, value_len) &&
is_valid_h3_header(name, name_len)) {
/* store as an HTTP1-style header */
CURL_TRC_CF(data, cf, "[%" PRId64 "] header: %.*s: %.*s",
stream->id, (int)name_len, name,
(int)value_len, value);
curlx_dyn_reset(&ctx->h1hdr);
result = curlx_dyn_addn(&ctx->h1hdr, (const char *)name, name_len);
if(!result)
result = curlx_dyn_addn(&ctx->h1hdr, STRCONST(": "));
if(!result)
result = curlx_dyn_addn(&ctx->h1hdr, (const char *)value, value_len);
if(!result)
result = curlx_dyn_addn(&ctx->h1hdr, STRCONST("\r\n"));
if(!result)
cf_quiche_write_hd(cf, data, stream, curlx_dyn_ptr(&ctx->h1hdr),
curlx_dyn_len(&ctx->h1hdr), FALSE);
}
else
CURL_TRC_CF(x->data, x->cf, "[%" PRIu64 "] ignore %zu bytes bad header",
stream->id, value_len + name_len);
}
if(result) {
CURL_TRC_CF(x->data, x->cf, "[%" PRIu64 "] on header error %d",
stream->id, result);
if(!stream->xfer_result)
stream->xfer_result = result;
}
return stream->xfer_result ? 1 : 0;
}
static CURLcode stream_resp_read(void *reader_ctx,
unsigned char *buf, size_t len,
size_t *pnread)
{
struct cb_ctx *x = reader_ctx;
struct cf_quiche_ctx *ctx = x->cf->ctx;
struct h3_stream_ctx *stream = H3_STREAM_CTX(ctx, x->data);
ssize_t nread;
*pnread = 0;
if(!stream)
return CURLE_RECV_ERROR;
nread = quiche_h3_recv_body(ctx->h3c, ctx->qconn, stream->id, buf, len);
if(!curlx_sztouz(nread, pnread))
return CURLE_AGAIN;
return CURLE_OK;
}
static void cf_quiche_flush_body(struct Curl_cfilter *cf,
struct Curl_easy *data,
struct h3_stream_ctx *stream)
{
struct cf_quiche_ctx *ctx = cf->ctx;
const uint8_t *buf;
size_t blen;
while(stream && !stream->xfer_result) {
if(Curl_bufq_peek(&ctx->writebuf, &buf, &blen)) {
stream->xfer_result = Curl_xfer_write_resp(
data, (const char *)buf, blen, FALSE);
Curl_bufq_skip(&ctx->writebuf, blen);
if(stream->xfer_result) {
CURL_TRC_CF(data, cf, "[%" PRId64 "] error %d writing %zu bytes"
" of data", stream->id, stream->xfer_result, blen);
}
}
else
break;
}
Curl_bufq_reset(&ctx->writebuf);
}
static void cf_quiche_recv_body(struct Curl_cfilter *cf,
struct Curl_easy *data,
struct h3_stream_ctx *stream)
{
struct cf_quiche_ctx *ctx = cf->ctx;
size_t nread;
struct cb_ctx cb_ctx;
CURLcode result = CURLE_OK;
if(!stream)
return;
/* Even when the transfer has already errored, we need to receive
* the data from quiche, as quiche will otherwise get stuck and
* raise events to receive over and over again. */
cb_ctx.cf = cf;
cb_ctx.data = data;
cb_ctx.stream = stream;
Curl_bufq_reset(&ctx->writebuf);
while(!result) {
result = Curl_bufq_slurp(&ctx->writebuf,
stream_resp_read, &cb_ctx, &nread);
if(!result)
cf_quiche_flush_body(cf, data, stream);
else if(result == CURLE_AGAIN)
break;
else if(result) {
CURL_TRC_CF(data, cf, "[%" PRIu64 "] recv_body error %d",
stream->id, result);
failf(data, "[%" PRIu64 "] Error %d in HTTP/3 response body for stream",
stream->id, result);
stream->closed = TRUE;
stream->reset = TRUE;
stream->send_closed = TRUE;
if(!stream->xfer_result)
stream->xfer_result = result;
}
}
cf_quiche_flush_body(cf, data, stream);
}
static void cf_quiche_process_ev(struct Curl_cfilter *cf,
struct Curl_easy *data,
struct h3_stream_ctx *stream,
quiche_h3_event *ev)
{
if(!stream)
return;
switch(quiche_h3_event_type(ev)) {
case QUICHE_H3_EVENT_HEADERS: {
struct cb_ctx cb_ctx;
stream->resp_got_header = TRUE;
cb_ctx.cf = cf;
cb_ctx.data = data;
cb_ctx.stream = stream;
quiche_h3_event_for_each_header(ev, cb_each_header, &cb_ctx);
CURL_TRC_CF(data, cf, "[%" PRIu64 "] <- [HEADERS]", stream->id);
Curl_multi_mark_dirty(data);
break;
}
case QUICHE_H3_EVENT_DATA:
if(!stream->resp_hds_complete) {
stream->resp_hds_complete = TRUE;
cf_quiche_write_hd(cf, data, stream, "\r\n", 2, FALSE);
}
cf_quiche_recv_body(cf, data, stream);
CURL_TRC_CF(data, cf, "[%" PRIu64 "] <- [DATA]", stream->id);
Curl_multi_mark_dirty(data);
break;
case QUICHE_H3_EVENT_RESET:
CURL_TRC_CF(data, cf, "[%" PRIu64 "] RESET", stream->id);
stream->closed = TRUE;
stream->reset = TRUE;
stream->send_closed = TRUE;
Curl_multi_mark_dirty(data);
break;
case QUICHE_H3_EVENT_FINISHED:
CURL_TRC_CF(data, cf, "[%" PRIu64 "] CLOSED", stream->id);
if(!stream->resp_hds_complete) {
stream->resp_hds_complete = TRUE;
cf_quiche_write_hd(cf, data, stream, "\r\n", 2, TRUE);
}
stream->closed = TRUE;
Curl_multi_mark_dirty(data);
break;
case QUICHE_H3_EVENT_GOAWAY:
CURL_TRC_CF(data, cf, "[%" PRIu64 "] <- [GOAWAY]", stream->id);
break;
default:
CURL_TRC_CF(data, cf, "[%" PRIu64 "] recv, unhandled event %d",
stream->id, quiche_h3_event_type(ev));
break;
}
}
struct cf_quich_disp_ctx {
uint64_t stream_id;
struct Curl_cfilter *cf;
struct Curl_multi *multi;
quiche_h3_event *ev;
};
static bool cf_quiche_disp_event(uint32_t mid, void *val, void *user_data)
{
struct cf_quich_disp_ctx *dctx = user_data;
struct h3_stream_ctx *stream = val;
if(stream->id == dctx->stream_id) {
struct Curl_easy *sdata = Curl_multi_get_easy(dctx->multi, mid);
if(sdata)
cf_quiche_process_ev(dctx->cf, sdata, stream, dctx->ev);
return FALSE; /* stop iterating */
}
return TRUE;
}
static CURLcode cf_poll_events(struct Curl_cfilter *cf,
struct Curl_easy *data)
{
struct cf_quiche_ctx *ctx = cf->ctx;
struct h3_stream_ctx *stream = NULL;
quiche_h3_event *ev;
/* Take in the events and distribute them to the transfers. */
while(ctx->h3c) {
int64_t rv = quiche_h3_conn_poll(ctx->h3c, ctx->qconn, &ev);
if(rv == QUICHE_H3_ERR_DONE) {
break;
}
else if(rv < 0) {
CURL_TRC_CF(data, cf, "error poll: %" PRId64, rv);
return CURLE_HTTP3;
}
else {
stream = H3_STREAM_CTX(ctx, data);
if(stream && stream->id == (uint64_t)rv) {
/* event for calling transfer */
cf_quiche_process_ev(cf, data, stream, ev);
quiche_h3_event_free(ev);
if(stream->xfer_result)
return stream->xfer_result;
}
else {
/* another transfer, do not return errors, as they are not for
* the calling transfer */
struct cf_quich_disp_ctx dctx;
dctx.stream_id = (uint64_t)rv;
dctx.cf = cf;
dctx.multi = data->multi;
dctx.ev = ev;
Curl_uint32_hash_visit(&ctx->streams, cf_quiche_disp_event, &dctx);
quiche_h3_event_free(ev);
}
}
}
return CURLE_OK;
}
struct recv_ctx {
struct Curl_cfilter *cf;
struct Curl_easy *data;
int pkts;
};
static CURLcode cf_quiche_recv_pkts(const unsigned char *buf, size_t buflen,
size_t gso_size,
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;
size_t pktlen, offset, nread;
ssize_t rv;
(void)ecn;
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;
for(offset = 0; offset < buflen; offset += gso_size) {
pktlen = ((offset + gso_size) <= buflen) ? gso_size : (buflen - offset);
rv = quiche_conn_recv(ctx->qconn,
(unsigned char *)CURL_UNCONST(buf + offset),
pktlen, &recv_info);
if(!curlx_sztouz(rv, &nread)) {
if(QUICHE_ERR_DONE == rv) {
if(quiche_conn_is_draining(ctx->qconn)) {
CURL_TRC_CF(r->data, r->cf, "ingress, connection is draining");
return CURLE_RECV_ERROR;
}
if(quiche_conn_is_closed(ctx->qconn)) {
CURL_TRC_CF(r->data, r->cf, "ingress, connection is closed");
return CURLE_RECV_ERROR;
}
CURL_TRC_CF(r->data, r->cf, "ingress, quiche is DONE");
return CURLE_OK;
}
else if(QUICHE_ERR_TLS_FAIL == rv) {
long verify_ok = SSL_get_verify_result(ctx->tls.ossl.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;
}
failf(r->data, "ingress, quiche reports TLS fail");
return CURLE_RECV_ERROR;
}
else {
failf(r->data, "quiche reports error %zd on receive", rv);
return CURLE_RECV_ERROR;
}
}
else if(nread < pktlen) {
CURL_TRC_CF(r->data, r->cf, "ingress, quiche only read %zu/%zu bytes",
nread, pktlen);
}
++r->pkts;
}
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,
cf_quiche_recv_pkts, &rctx);
if(result)
return result;
if(rctx.pkts > 0) {
/* quiche digested ingress packets. It might have opened flow control
* windows again. */
DEBUGASSERT(data->multi);
cf_quiche_for_all_streams(cf, data->multi, cf_quiche_do_resume, NULL);
}
return cf_poll_events(cf, data);
}
struct read_ctx {
struct Curl_cfilter *cf;
struct Curl_easy *data;
quiche_send_info send_info;
};
static CURLcode read_pkt_to_send(void *userp,
unsigned char *buf, size_t buflen,
size_t *pnread)
{
struct read_ctx *x = userp;
struct cf_quiche_ctx *ctx = x->cf->ctx;
ssize_t rv;
*pnread = 0;
rv = quiche_conn_send(ctx->qconn, buf, buflen, &x->send_info);
if(rv == QUICHE_ERR_DONE)
return CURLE_AGAIN;
if(!curlx_sztouz(rv, pnread)) {
failf(x->data, "quiche_conn_send returned %zd", rv);
return CURLE_SEND_ERROR;
}
return CURLE_OK;
}
/*
* 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;
size_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)) {
if(quiche_conn_is_timed_out(ctx->qconn))
failf(data, "connection closed by idle timeout");
else
failf(data, "connection closed by server");
/* Connection timed out, expire all transfers belonging to it
* as will not get any more POLL events here. */
cf_quiche_expire_conn_closed(cf, data);
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 */
result = Curl_bufq_sipn(&ctx->q.sendbuf, 0,
read_pkt_to_send, &readx, &nread);
if(result) {
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(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 CURLcode recv_closed_stream(struct Curl_cfilter *cf,
struct Curl_easy *data,
size_t *pnread)
{
struct cf_quiche_ctx *ctx = cf->ctx;
struct h3_stream_ctx *stream = H3_STREAM_CTX(ctx, data);
CURLcode result = CURLE_OK;
DEBUGASSERT(stream);
*pnread = 0;
if(stream->reset) {
failf(data, "HTTP/3 stream %" PRId64 " reset by server (error 0x%" PRIx64
" %s)", stream->id, stream->error3,
vquic_h3_err_str(stream->error3));
result = data->req.bytecount ? CURLE_PARTIAL_FILE : CURLE_HTTP3;
CURL_TRC_CF(data, cf, "[%" PRIu64 "] cf_recv, was reset -> %d",
stream->id, result);
}
else if(!stream->resp_got_header) {
failf(data, "HTTP/3 stream %" PRIu64 " was closed cleanly, but before "
"getting all response header fields, treated as error",
stream->id);
result = CURLE_HTTP3;
}
return result;
}
static CURLcode cf_quiche_recv(struct Curl_cfilter *cf, struct Curl_easy *data,
char *buf, size_t blen, size_t *pnread)
{
struct cf_quiche_ctx *ctx = cf->ctx;
struct h3_stream_ctx *stream = H3_STREAM_CTX(ctx, data);
CURLcode result = CURLE_OK;
*pnread = 0;
(void)buf;
(void)blen;
vquic_ctx_update_time(&ctx->q, Curl_pgrs_now(data));
if(!stream)
return CURLE_RECV_ERROR;
result = cf_process_ingress(cf, data);
if(result) {
CURL_TRC_CF(data, cf, "cf_recv, error on ingress");
goto out;
}
if(stream->xfer_result) {
cf_quiche_stream_close(cf, data, stream);
result = stream->xfer_result;
goto out;
}
else if(stream->closed)
result = recv_closed_stream(cf, data, pnread);
else if(quiche_conn_is_draining(ctx->qconn)) {
failf(data, "QUIC connection is draining");
result = CURLE_HTTP3;
}
else
result = CURLE_AGAIN;
out:
result = Curl_1st_err(result, cf_flush_egress(cf, data));
if(*pnread > 0)
ctx->data_recvd += *pnread;
CURL_TRC_CF(data, cf, "[%" PRIu64 "] cf_recv(len=%zu) -> %d, %zu, total=%"
FMT_OFF_T, stream->id, blen, result, *pnread, ctx->data_recvd);
return result;
}
static CURLcode cf_quiche_send_body(struct Curl_cfilter *cf,
struct Curl_easy *data,
struct h3_stream_ctx *stream,
const uint8_t *buf, size_t len, bool eos,
size_t *pnwritten)
{
struct cf_quiche_ctx *ctx = cf->ctx;
ssize_t rv;
*pnwritten = 0;
rv = quiche_h3_send_body(ctx->h3c, ctx->qconn, stream->id,
(uint8_t *)CURL_UNCONST(buf), len, eos);
if(rv == QUICHE_H3_ERR_DONE || (rv == 0 && len > 0)) {
/* Blocked on flow control and should HOLD sending. But when do we open
* again? */
if(!quiche_conn_stream_writable(ctx->qconn, stream->id, len)) {
CURL_TRC_CF(data, cf, "[%" PRIu64 "] send_body(len=%zu) "
"-> window exhausted", stream->id, len);
stream->quic_flow_blocked = TRUE;
}
return CURLE_AGAIN;
}
else if(rv == QUICHE_H3_TRANSPORT_ERR_INVALID_STREAM_STATE) {
CURL_TRC_CF(data, cf, "[%" PRIu64 "] send_body(len=%zu) "
"-> invalid stream state", stream->id, len);
return CURLE_HTTP3;
}
else if(rv == QUICHE_H3_TRANSPORT_ERR_FINAL_SIZE) {
CURL_TRC_CF(data, cf, "[%" PRIu64 "] send_body(len=%zu) -> exceeds size",
stream->id, len);
return CURLE_SEND_ERROR;
}
else if(!curlx_sztouz(rv, pnwritten)) {
CURL_TRC_CF(data, cf, "[%" PRIu64 "] send_body(len=%zu) -> quiche err %zd",
stream->id, len, rv);
return CURLE_SEND_ERROR;
}
else {
if(eos && (len == *pnwritten))
stream->send_closed = TRUE;
CURL_TRC_CF(data, cf, "[%" PRIu64 "] send body(len=%zu, eos=%d) -> %zu",
stream->id, len, stream->send_closed, *pnwritten);
return CURLE_OK;
}
}
static CURLcode h3_open_stream(struct Curl_cfilter *cf,
struct Curl_easy *data,
const uint8_t *buf, size_t blen, bool eos,
size_t *pnwritten)
{
struct cf_quiche_ctx *ctx = cf->ctx;
struct h3_stream_ctx *stream = H3_STREAM_CTX(ctx, data);
size_t nheader, i;
int64_t rv;
struct dynhds h2_headers;
quiche_h3_header *nva = NULL;
CURLcode result = CURLE_OK;
*pnwritten = 0;
if(!stream) {
result = h3_data_setup(cf, data);
if(result)
return result;
stream = H3_STREAM_CTX(ctx, data);
DEBUGASSERT(stream);
}
Curl_dynhds_init(&h2_headers, 0, DYN_HTTP_REQUEST);
DEBUGASSERT(stream);
result = Curl_h1_req_parse_read(&stream->h1, buf, blen, NULL,
!data->state.http_ignorecustom ?
data->set.str[STRING_CUSTOMREQUEST] : NULL,
0, pnwritten);
if(result)
goto out;
if(!stream->h1.done) {
/* need more data */
goto out;
}
DEBUGASSERT(stream->h1.req);
result = Curl_http_req_to_h2(&h2_headers, stream->h1.req, data);
if(result)
goto out;
/* no longer needed */
Curl_h1_req_parse_free(&stream->h1);
nheader = Curl_dynhds_count(&h2_headers);
nva = curlx_malloc(sizeof(quiche_h3_header) * nheader);
if(!nva) {
result = CURLE_OUT_OF_MEMORY;
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;
}
buf += *pnwritten;
blen -= *pnwritten;
if(eos && !blen)
stream->send_closed = TRUE;
rv = quiche_h3_send_request(ctx->h3c, ctx->qconn, nva, nheader,
stream->send_closed);
CURL_TRC_CF(data, cf, "quiche_send_request() -> %" PRId64, rv);
if(rv < 0) {
if(QUICHE_H3_ERR_STREAM_BLOCKED == rv) {
/* quiche seems to report this error if the connection window is
* exhausted. Which happens frequently and intermittent. */
CURL_TRC_CF(data, cf, "[%" PRIu64 "] blocked", stream->id);
stream->quic_flow_blocked = TRUE;
result = CURLE_AGAIN;
goto out;
}
else {
CURL_TRC_CF(data, cf, "send_request(%s) -> %" PRIu64,
Curl_bufref_ptr(&data->state.url), rv);
}
result = CURLE_SEND_ERROR;
goto out;
}
DEBUGASSERT(!stream->opened);
stream->id = (uint64_t)rv;
stream->opened = TRUE;
stream->closed = FALSE;
stream->reset = FALSE;
if(Curl_trc_is_verbose(data)) {
infof(data, "[HTTP/3] [%" PRIu64 "] OPENED stream for %s",
stream->id, Curl_bufref_ptr(&data->state.url));
for(i = 0; i < nheader; ++i) {
infof(data, "[HTTP/3] [%" PRIu64 "] [%.*s: %.*s]", stream->id,
(int)nva[i].name_len, nva[i].name,
(int)nva[i].value_len, nva[i].value);
}
}
if(blen) { /* after the headers, there was request BODY data */
size_t nwritten;
CURLcode r2 = CURLE_OK;
r2 = cf_quiche_send_body(cf, data, stream, buf, blen, eos, &nwritten);
if(r2 && (CURLE_AGAIN != r2)) { /* real error, fail */
result = r2;
}
else if(nwritten > 0) {
*pnwritten += nwritten;
}
}
out:
curlx_free(nva);
Curl_dynhds_free(&h2_headers);
return result;
}
static CURLcode cf_quiche_send(struct Curl_cfilter *cf, struct Curl_easy *data,
const uint8_t *buf, size_t len, bool eos,
size_t *pnwritten)
{
struct cf_quiche_ctx *ctx = cf->ctx;
struct h3_stream_ctx *stream = H3_STREAM_CTX(ctx, data);
CURLcode result;
*pnwritten = 0;
vquic_ctx_update_time(&ctx->q, Curl_pgrs_now(data));
result = cf_process_ingress(cf, data);
if(result)
goto out;
if(!stream || !stream->opened) {
result = h3_open_stream(cf, data, buf, len, eos, pnwritten);
if(result)
goto out;
stream = H3_STREAM_CTX(ctx, data);
}
else if(stream->xfer_result) {
cf_quiche_stream_close(cf, data, stream);
result = stream->xfer_result;
}
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, "[%" PRIu64 "] discarding data"
"on closed stream with response", stream->id);
result = CURLE_OK;
*pnwritten = len;
goto out;
}
CURL_TRC_CF(data, cf, "[%" PRIu64 "] send_body(len=%zu) "
"-> stream closed", stream->id, len);
result = CURLE_HTTP3;
goto out;
}
else {
result = cf_quiche_send_body(cf, data, stream, buf, len, eos, pnwritten);
}
out:
result = Curl_1st_err(result, cf_flush_egress(cf, data));
CURL_TRC_CF(data, cf, "[%" PRIu64 "] cf_send(len=%zu) -> %d, %zu",
stream ? stream->id : (uint64_t)~0, len,
result, *pnwritten);
return result;
}
static bool stream_is_writeable(struct Curl_cfilter *cf,
struct Curl_easy *data)
{
struct cf_quiche_ctx *ctx = cf->ctx;
struct h3_stream_ctx *stream = H3_STREAM_CTX(ctx, data);
return stream && (quiche_conn_stream_writable(
ctx->qconn, stream->id, 1) > 0);
}
static CURLcode cf_quiche_adjust_pollset(struct Curl_cfilter *cf,
struct Curl_easy *data,
struct easy_pollset *ps)
{
struct cf_quiche_ctx *ctx = cf->ctx;
bool want_recv, want_send;
CURLcode result = CURLE_OK;
if(!ctx->qconn)
return CURLE_OK;
Curl_pollset_check(data, ps, ctx->q.sockfd, &want_recv, &want_send);
if(want_recv || want_send) {
struct h3_stream_ctx *stream = H3_STREAM_CTX(ctx, data);
bool c_exhaust, s_exhaust;
c_exhaust = FALSE; /* Have not found any call in quiche that tells
us if the connection itself is blocked */
s_exhaust = want_send && stream && stream->opened &&
(stream->quic_flow_blocked || !stream_is_writeable(cf, data));
want_recv = (want_recv || c_exhaust || s_exhaust);
want_send = (!s_exhaust && want_send) ||
!Curl_bufq_is_empty(&ctx->q.sendbuf);
result = Curl_pollset_set(data, ps, ctx->q.sockfd, want_recv, want_send);
}
return result;
}
static CURLcode h3_data_pause(struct Curl_cfilter *cf,
struct Curl_easy *data,
bool pause)
{
/* There seems to exist no API in quiche to shrink/enlarge the streams
* windows. As we do in HTTP/2. */
(void)cf;
if(!pause) {
Curl_multi_mark_dirty(data);
}
return CURLE_OK;
}
static CURLcode cf_quiche_cntrl(struct Curl_cfilter *cf,
struct Curl_easy *data,
int event, int arg1, void *arg2)
{
struct cf_quiche_ctx *ctx = cf->ctx;
CURLcode result = CURLE_OK;
(void)arg1;
(void)arg2;
switch(event) {
case CF_CTRL_DATA_SETUP:
break;
case CF_CTRL_DATA_PAUSE:
result = h3_data_pause(cf, data, (arg1 != 0));
break;
case CF_CTRL_DATA_DONE:
h3_data_done(cf, data);
break;
case CF_CTRL_DATA_DONE_SEND: {
struct h3_stream_ctx *stream = H3_STREAM_CTX(ctx, data);
if(stream && !stream->send_closed) {
unsigned char body[1];
size_t sent;
stream->send_closed = TRUE;
body[0] = 'X';
result = cf_quiche_send(cf, data, body, 0, TRUE, &sent);
CURL_TRC_CF(data, cf, "[%" PRIu64 "] DONE_SEND -> %d, %zu",
stream->id, result, sent);
}
break;
}
case CF_CTRL_CONN_INFO_UPDATE:
if(!cf->sockindex && cf->connected) {
cf->conn->httpversion_seen = 30;
Curl_conn_set_multiplex(cf->conn);
}
break;
default:
break;
}
return result;
}
static CURLcode cf_quiche_ctx_open(struct Curl_cfilter *cf,
struct Curl_easy *data)
{
struct cf_quiche_ctx *ctx = cf->ctx;
int rv;
CURLcode result;
const struct Curl_sockaddr_ex *sockaddr;
static const struct alpn_spec ALPN_SPEC_H3 = { { "h3" }, 1 };
DEBUGASSERT(ctx->q.sockfd != CURL_SOCKET_BAD);
DEBUGASSERT(ctx->initialized);
result = vquic_ctx_init(data, &ctx->q);
if(result)
return result;
ctx->cfg = quiche_config_new(QUICHE_PROTOCOL_VERSION);
if(!ctx->cfg) {
failf(data, "cannot create quiche config");
return CURLE_FAILED_INIT;
}
quiche_config_enable_pacing(ctx->cfg, FALSE);
quiche_config_set_initial_max_data(ctx->cfg, (1 * 1024 * 1024)
/* (QUIC_MAX_STREAMS/2) * H3_STREAM_WINDOW_SIZE */);
quiche_config_set_initial_max_streams_bidi(ctx->cfg, QUIC_MAX_STREAMS);
quiche_config_set_initial_max_streams_uni(ctx->cfg, QUIC_MAX_STREAMS);
quiche_config_set_initial_max_stream_data_bidi_local(ctx->cfg,
H3_STREAM_WINDOW_SIZE);
quiche_config_set_initial_max_stream_data_bidi_remote(ctx->cfg,
H3_STREAM_WINDOW_SIZE);
quiche_config_set_initial_max_stream_data_uni(ctx->cfg,
H3_STREAM_WINDOW_SIZE);
quiche_config_set_disable_active_migration(ctx->cfg, TRUE);
quiche_config_set_max_connection_window(ctx->cfg,
10 * QUIC_MAX_STREAMS * H3_STREAM_WINDOW_SIZE);
quiche_config_set_max_stream_window(ctx->cfg, 10 * H3_STREAM_WINDOW_SIZE);
quiche_config_set_application_protos(ctx->cfg,
(uint8_t *)CURL_UNCONST(QUICHE_H3_APPLICATION_PROTOCOL),
sizeof(QUICHE_H3_APPLICATION_PROTOCOL)
- 1);
result = Curl_vquic_tls_init(&ctx->tls, cf, data, &ctx->peer,
&ALPN_SPEC_H3, NULL, NULL, cf, NULL);
if(result)
return result;
result = Curl_rand(data, ctx->scid, sizeof(ctx->scid));
if(result)
return result;
if(Curl_cf_socket_peek(cf->next, data, &ctx->q.sockfd, &sockaddr, NULL))
return CURLE_QUIC_CONNECT_ERROR;
ctx->q.local_addrlen = sizeof(ctx->q.local_addr);
rv = getsockname(ctx->q.sockfd, (struct sockaddr *)&ctx->q.local_addr,
&ctx->q.local_addrlen);
if(rv == -1)
return CURLE_QUIC_CONNECT_ERROR;
ctx->qconn = quiche_conn_new_with_tls((const uint8_t *)ctx->scid,
sizeof(ctx->scid), NULL, 0,
(struct sockaddr *)&ctx->q.local_addr,
ctx->q.local_addrlen,
&sockaddr->curl_sa_addr,
sockaddr->addrlen,
ctx->cfg, ctx->tls.ossl.ssl, FALSE);
if(!ctx->qconn) {
failf(data, "cannot create quiche connection");
return CURLE_OUT_OF_MEMORY;
}
/* Known to not work on Windows */
#if !defined(_WIN32) && defined(HAVE_QUICHE_CONN_SET_QLOG_FD)
{
int qfd;
(void)Curl_qlogdir(data, ctx->scid, sizeof(ctx->scid), &qfd);
if(qfd != -1)
quiche_conn_set_qlog_fd(ctx->qconn, qfd, "qlog title", "curl qlog");
}
#endif
result = cf_flush_egress(cf, data);
if(result)
return result;
{
unsigned char alpn_protocols[] = QUICHE_H3_APPLICATION_PROTOCOL;
unsigned alpn_len, offset = 0;
/* Replace each ALPN length prefix by a comma. */
while(offset < sizeof(alpn_protocols) - 1) {
alpn_len = alpn_protocols[offset];
alpn_protocols[offset] = ',';
offset += 1 + alpn_len;
}
CURL_TRC_CF(data, cf, "Sent QUIC client Initial, ALPN: %s",
alpn_protocols + 1);
}
return CURLE_OK;
}
static CURLcode cf_quiche_verify_peer(struct Curl_cfilter *cf,
struct Curl_easy *data)
{
struct cf_quiche_ctx *ctx = cf->ctx;
return Curl_vquic_tls_verify_peer(&ctx->tls, cf, data, &ctx->peer);
}
static CURLcode cf_quiche_connect(struct Curl_cfilter *cf,
struct Curl_easy *data,
bool *done)
{
struct cf_quiche_ctx *ctx = cf->ctx;
CURLcode result = CURLE_OK;
if(cf->connected) {
*done = TRUE;
return CURLE_OK;
}
/* Connect the UDP filter first */
if(!cf->next->connected) {
result = Curl_conn_cf_connect(cf->next, data, done);
if(result || !*done)
return result;
}
*done = FALSE;
vquic_ctx_update_time(&ctx->q, Curl_pgrs_now(data));
if(!ctx->qconn) {
result = cf_quiche_ctx_open(cf, data);
if(result)
goto out;
ctx->started_at = ctx->q.last_op;
result = cf_flush_egress(cf, data);
/* we do not expect to be able to recv anything yet */
goto out;
}
result = cf_process_ingress(cf, data);
if(result)
goto out;
result = cf_flush_egress(cf, data);
if(result)
goto out;
if(quiche_conn_is_established(ctx->qconn)) {
ctx->handshake_at = ctx->q.last_op;
CURL_TRC_CF(data, cf, "handshake complete after %" FMT_TIMEDIFF_T "ms",
curlx_ptimediff_ms(&ctx->handshake_at, &ctx->started_at));
result = cf_quiche_verify_peer(cf, data);
if(!result) {
CURL_TRC_CF(data, cf, "peer verified");
ctx->h3config = quiche_h3_config_new();
if(!ctx->h3config) {
result = CURLE_OUT_OF_MEMORY;
goto out;
}
/* Create a new HTTP/3 connection on the QUIC connection. */
ctx->h3c = quiche_h3_conn_new_with_transport(ctx->qconn, ctx->h3config);
if(!ctx->h3c) {
result = CURLE_OUT_OF_MEMORY;
goto out;
}
cf->connected = TRUE;
*done = TRUE;
}
}
else if(quiche_conn_is_draining(ctx->qconn)) {
/* When a QUIC server instance is shutting down, it may send us a
* CONNECTION_CLOSE right away. Our connection then enters the DRAINING
* state. The CONNECT may work in the near future again. Indicate
* that as a "weird" reply. */
result = CURLE_WEIRD_SERVER_REPLY;
}
out:
#ifndef CURL_DISABLE_VERBOSE_STRINGS
if(result && result != CURLE_AGAIN) {
struct ip_quadruple ip;
if(!Curl_cf_socket_peek(cf->next, data, NULL, NULL, &ip))
infof(data, "connect to %s port %u failed: %s",
ip.remote_ip, ip.remote_port, curl_easy_strerror(result));
else
infof(data, "connect failed: %s", curl_easy_strerror(result));
}
#endif
return result;
}
static CURLcode cf_quiche_shutdown(struct Curl_cfilter *cf,
struct Curl_easy *data, bool *done)
{
struct cf_quiche_ctx *ctx = cf->ctx;
CURLcode result = CURLE_OK;
if(cf->shutdown || !ctx || !ctx->qconn) {
*done = TRUE;
return CURLE_OK;
}
*done = FALSE;
if(!ctx->shutdown_started) {
int err;
ctx->shutdown_started = TRUE;
vquic_ctx_update_time(&ctx->q, Curl_pgrs_now(data));
err = quiche_conn_close(ctx->qconn, TRUE, 0, NULL, 0);
if(err) {
CURL_TRC_CF(data, cf, "error %d adding shutdown packet, "
"aborting shutdown", err);
result = CURLE_SEND_ERROR;
goto out;
}
}
if(!Curl_bufq_is_empty(&ctx->q.sendbuf)) {
CURL_TRC_CF(data, cf, "shutdown, flushing sendbuf");
result = cf_flush_egress(cf, data);
if(result)
goto out;
}
if(Curl_bufq_is_empty(&ctx->q.sendbuf)) {
/* sent everything, quiche does not seem to support a graceful
* shutdown waiting for a reply, so ware done. */
CURL_TRC_CF(data, cf, "shutdown completely sent off, done");
*done = TRUE;
}
else {
CURL_TRC_CF(data, cf, "shutdown sending blocked");
}
out:
return result;
}
static void cf_quiche_close(struct Curl_cfilter *cf, struct Curl_easy *data)
{
if(cf->ctx) {
bool done;
(void)cf_quiche_shutdown(cf, data, &done);
cf_quiche_ctx_close(cf->ctx);
cf->connected = FALSE;
}
}
static void cf_quiche_destroy(struct Curl_cfilter *cf, struct Curl_easy *data)
{
(void)data;
if(cf->ctx) {
cf_quiche_ctx_close(cf->ctx);
cf_quiche_ctx_free(cf->ctx);
cf->ctx = NULL;
}
}
static CURLcode cf_quiche_query(struct Curl_cfilter *cf,
struct Curl_easy *data,
int query, int *pres1, void *pres2)
{
struct cf_quiche_ctx *ctx = cf->ctx;
switch(query) {
case CF_QUERY_MAX_CONCURRENT: {
uint64_t max_streams = cf->conn->attached_xfers;
if(!ctx->goaway && ctx->qconn) {
max_streams += quiche_conn_peer_streams_left_bidi(ctx->qconn);
}
*pres1 = (max_streams > INT_MAX) ? INT_MAX : (int)max_streams;
CURL_TRC_CF(data, cf, "query conn[%" FMT_OFF_T "]: "
"MAX_CONCURRENT -> %d (%u in use)",
cf->conn->connection_id, *pres1, cf->conn->attached_xfers);
return CURLE_OK;
}
case CF_QUERY_CONNECT_REPLY_MS:
if(ctx->q.got_first_byte) {
timediff_t ms = curlx_ptimediff_ms(&ctx->q.first_byte_at,
&ctx->started_at);
*pres1 = (ms < INT_MAX) ? (int)ms : INT_MAX;
}
else
*pres1 = -1;
return CURLE_OK;
case CF_QUERY_TIMER_CONNECT: {
struct curltime *when = pres2;
if(ctx->q.got_first_byte)
*when = ctx->q.first_byte_at;
return CURLE_OK;
}
case CF_QUERY_TIMER_APPCONNECT: {
struct curltime *when = pres2;
if(cf->connected)
*when = ctx->handshake_at;
return CURLE_OK;
}
case CF_QUERY_HTTP_VERSION:
*pres1 = 30;
return CURLE_OK;
case CF_QUERY_SSL_INFO:
case CF_QUERY_SSL_CTX_INFO: {
struct curl_tlssessioninfo *info = pres2;
if(Curl_vquic_tls_get_ssl_info(&ctx->tls,
(query == CF_QUERY_SSL_CTX_INFO), info))
return CURLE_OK;
break;
}
case CF_QUERY_ALPN_NEGOTIATED: {
const char **palpn = pres2;
DEBUGASSERT(palpn);
*palpn = cf->connected ? "h3" : NULL;
return CURLE_OK;
}
default:
break;
}
return cf->next ?
cf->next->cft->query(cf->next, data, query, pres1, pres2) :
CURLE_UNKNOWN_OPTION;
}
static bool cf_quiche_conn_is_alive(struct Curl_cfilter *cf,
struct Curl_easy *data,
bool *input_pending)
{
struct cf_quiche_ctx *ctx = cf->ctx;
bool alive = TRUE;
*input_pending = FALSE;
if(!ctx->qconn)
return FALSE;
if(quiche_conn_is_closed(ctx->qconn)) {
if(quiche_conn_is_timed_out(ctx->qconn))
CURL_TRC_CF(data, cf, "connection was closed due to idle timeout");
else
CURL_TRC_CF(data, cf, "connection is closed");
return FALSE;
}
if(!cf->next || !cf->next->cft->is_alive(cf->next, data, input_pending))
return FALSE;
if(*input_pending) {
/* This happens before we have sent off a request and the connection is
not in use by any other transfer, there should not be any data here,
only "protocol frames" */
*input_pending = FALSE;
if(cf_process_ingress(cf, data))
alive = FALSE;
else {
alive = TRUE;
}
}
return alive;
}
struct Curl_cftype Curl_cft_http3 = {
"HTTP/3",
CF_TYPE_IP_CONNECT | CF_TYPE_SSL | CF_TYPE_MULTIPLEX | CF_TYPE_HTTP,
0,
cf_quiche_destroy,
cf_quiche_connect,
cf_quiche_close,
cf_quiche_shutdown,
cf_quiche_adjust_pollset,
Curl_cf_def_data_pending,
cf_quiche_send,
cf_quiche_recv,
cf_quiche_cntrl,
cf_quiche_conn_is_alive,
Curl_cf_def_conn_keep_alive,
cf_quiche_query,
};
CURLcode Curl_cf_quiche_create(struct Curl_cfilter **pcf,
struct Curl_easy *data,
struct connectdata *conn,
const struct Curl_addrinfo *ai)
{
struct cf_quiche_ctx *ctx = NULL;
struct Curl_cfilter *cf = NULL;
CURLcode result;
ctx = curlx_calloc(1, sizeof(*ctx));
if(!ctx) {
result = CURLE_OUT_OF_MEMORY;
goto out;
}
cf_quiche_ctx_init(ctx);
result = Curl_cf_create(&cf, &Curl_cft_http3, ctx);
if(result)
goto out;
cf->conn = conn;
result = Curl_cf_udp_create(&cf->next, data, conn, ai, TRNSPRT_QUIC);
if(result)
goto out;
cf->next->conn = cf->conn;
cf->next->sockindex = cf->sockindex;
out:
*pcf = (!result) ? cf : NULL;
if(result) {
if(cf)
Curl_conn_cf_discard_chain(&cf, data);
else if(ctx)
cf_quiche_ctx_free(ctx);
}
return result;
}
#endif
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