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unplugged-system/external/curl/lib/vquic/curl_quiche.c

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Initial commit: AOSP 14 with modifications for Unplugged OS
2025-10-06 13:59:42 +00:00
/***************************************************************************
* _ _ ____ _
* 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"
#ifdef USE_QUICHE
#include <quiche.h>
#include <openssl/err.h>
#include <openssl/ssl.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 "vquic.h"
#include "vquic_int.h"
#include "curl_quiche.h"
#include "transfer.h"
#include "h2h3.h"
#include "vtls/openssl.h"
#include "vtls/keylog.h"
/* The last 3 #include files should be in this order */
#include "curl_printf.h"
#include "curl_memory.h"
#include "memdebug.h"
#define QUIC_MAX_STREAMS (256*1024)
#define QUIC_MAX_DATA (1*1024*1024)
#define QUIC_IDLE_TIMEOUT (60 * 1000) /* milliseconds */
/* how many UDP packets to send max in one call */
#define MAX_PKT_BURST 10
#define MAX_UDP_PAYLOAD_SIZE 1452
/*
* Store quiche version info in this buffer.
*/
void Curl_quiche_ver(char *p, size_t len)
{
(void)msnprintf(p, len, "quiche/%s", quiche_version());
}
static void keylog_callback(const SSL *ssl, const char *line)
{
(void)ssl;
Curl_tls_keylog_write_line(line);
}
static SSL_CTX *quic_ssl_ctx(struct Curl_easy *data)
{
SSL_CTX *ssl_ctx = SSL_CTX_new(TLS_method());
SSL_CTX_set_alpn_protos(ssl_ctx,
(const uint8_t *)QUICHE_H3_APPLICATION_PROTOCOL,
sizeof(QUICHE_H3_APPLICATION_PROTOCOL) - 1);
SSL_CTX_set_default_verify_paths(ssl_ctx);
/* Open the file if a TLS or QUIC backend has not done this before. */
Curl_tls_keylog_open();
if(Curl_tls_keylog_enabled()) {
SSL_CTX_set_keylog_callback(ssl_ctx, keylog_callback);
}
{
struct connectdata *conn = data->conn;
if(conn->ssl_config.verifypeer) {
const char * const ssl_cafile = conn->ssl_config.CAfile;
const char * const ssl_capath = conn->ssl_config.CApath;
if(ssl_cafile || ssl_capath) {
SSL_CTX_set_verify(ssl_ctx, SSL_VERIFY_PEER, NULL);
/* tell OpenSSL where to find CA certificates that are used to verify
the server's certificate. */
if(!SSL_CTX_load_verify_locations(ssl_ctx, ssl_cafile, ssl_capath)) {
/* Fail if we insist on successfully verifying the server. */
failf(data, "error setting certificate verify locations:"
" CAfile: %s CApath: %s",
ssl_cafile ? ssl_cafile : "none",
ssl_capath ? ssl_capath : "none");
return NULL;
}
infof(data, " CAfile: %s", ssl_cafile ? ssl_cafile : "none");
infof(data, " CApath: %s", ssl_capath ? ssl_capath : "none");
}
#ifdef CURL_CA_FALLBACK
else {
/* verifying the peer without any CA certificates won't work so
use openssl's built-in default as fallback */
SSL_CTX_set_default_verify_paths(ssl_ctx);
}
#endif
}
}
return ssl_ctx;
}
struct quic_handshake {
char *buf; /* pointer to the buffer */
size_t alloclen; /* size of allocation */
size_t len; /* size of content in buffer */
size_t nread; /* how many bytes have been read */
};
struct h3_event_node {
struct h3_event_node *next;
quiche_h3_event *ev;
};
struct cf_quiche_ctx {
struct cf_quic_ctx q;
quiche_conn *qconn;
quiche_config *cfg;
quiche_h3_conn *h3c;
quiche_h3_config *h3config;
uint8_t scid[QUICHE_MAX_CONN_ID_LEN];
SSL_CTX *sslctx;
SSL *ssl;
struct curltime started_at; /* time the current attempt started */
struct curltime handshake_at; /* time connect handshake finished */
struct curltime first_byte_at; /* when first byte was recvd */
struct curltime reconnect_at; /* time the next attempt should start */
BIT(goaway); /* got GOAWAY from server */
BIT(got_first_byte); /* if first byte was received */
};
#ifdef DEBUG_QUICHE
static void quiche_debug_log(const char *line, void *argp)
{
(void)argp;
fprintf(stderr, "%s\n", line);
}
#endif
static void h3_clear_pending(struct Curl_easy *data)
{
struct HTTP *stream = data->req.p.http;
if(stream->pending) {
struct h3_event_node *node, *next;
for(node = stream->pending; node; node = next) {
next = node->next;
quiche_h3_event_free(node->ev);
free(node);
}
stream->pending = NULL;
}
}
static void cf_quiche_ctx_clear(struct cf_quiche_ctx *ctx)
{
if(ctx) {
vquic_ctx_free(&ctx->q);
if(ctx->qconn)
quiche_conn_free(ctx->qconn);
if(ctx->h3config)
quiche_h3_config_free(ctx->h3config);
if(ctx->h3c)
quiche_h3_conn_free(ctx->h3c);
if(ctx->cfg)
quiche_config_free(ctx->cfg);
memset(ctx, 0, sizeof(*ctx));
}
}
static void notify_drain(struct Curl_cfilter *cf,
struct Curl_easy *data)
{
(void)cf;
data->state.drain = 1;
Curl_expire(data, 0, EXPIRE_RUN_NOW);
}
static CURLcode h3_add_event(struct Curl_cfilter *cf,
struct Curl_easy *data,
int64_t stream3_id, quiche_h3_event *ev)
{
struct Curl_easy *mdata;
struct h3_event_node *node, **pnext;
DEBUGASSERT(data->multi);
for(mdata = data->multi->easyp; mdata; mdata = mdata->next) {
if(mdata->req.p.http && mdata->req.p.http->stream3_id == stream3_id) {
break;
}
}
if(!mdata) {
DEBUGF(LOG_CF(data, cf, "[h3sid=%"PRId64"] event discarded, easy handle "
"not found", stream3_id));
quiche_h3_event_free(ev);
return CURLE_OK;
}
node = calloc(sizeof(*node), 1);
if(!node) {
quiche_h3_event_free(ev);
return CURLE_OUT_OF_MEMORY;
}
node->ev = ev;
/* append to process them in order of arrival */
pnext = &mdata->req.p.http->pending;
while(*pnext) {
pnext = &((*pnext)->next);
}
*pnext = node;
notify_drain(cf, mdata);
return CURLE_OK;
}
struct h3h1header {
char *dest;
size_t destlen; /* left to use */
size_t nlen; /* used */
};
static int cb_each_header(uint8_t *name, size_t name_len,
uint8_t *value, size_t value_len,
void *argp)
{
struct h3h1header *headers = (struct h3h1header *)argp;
size_t olen = 0;
if((name_len == 7) && !strncmp(H2H3_PSEUDO_STATUS, (char *)name, 7)) {
msnprintf(headers->dest,
headers->destlen, "HTTP/3 %.*s \r\n",
(int) value_len, value);
}
else if(!headers->nlen) {
return CURLE_HTTP3;
}
else {
msnprintf(headers->dest,
headers->destlen, "%.*s: %.*s\r\n",
(int)name_len, name, (int) value_len, value);
}
olen = strlen(headers->dest);
headers->destlen -= olen;
headers->nlen += olen;
headers->dest += olen;
return 0;
}
static ssize_t cf_recv_body(struct Curl_cfilter *cf,
struct Curl_easy *data,
char *buf, size_t len,
CURLcode *err)
{
struct cf_quiche_ctx *ctx = cf->ctx;
struct HTTP *stream = data->req.p.http;
ssize_t nread;
size_t offset = 0;
if(!stream->firstbody) {
/* add a header-body separator CRLF */
offset = 2;
}
nread = quiche_h3_recv_body(ctx->h3c, ctx->qconn, stream->stream3_id,
(unsigned char *)buf + offset, len - offset);
if(nread >= 0) {
DEBUGF(LOG_CF(data, cf, "[h3sid=%"PRId64"][DATA] len=%zd",
stream->stream3_id, nread));
if(!stream->firstbody) {
stream->firstbody = TRUE;
buf[0] = '\r';
buf[1] = '\n';
nread += offset;
}
}
else if(nread == -1) {
*err = CURLE_AGAIN;
stream->h3_recving_data = FALSE;
}
else {
failf(data, "Error %zd in HTTP/3 response body for stream[%"PRId64"]",
nread, stream->stream3_id);
stream->closed = TRUE;
stream->reset = TRUE;
streamclose(cf->conn, "Reset of stream");
stream->h3_recving_data = FALSE;
nread = -1;
*err = stream->h3_got_header? CURLE_PARTIAL_FILE : CURLE_RECV_ERROR;
}
return nread;
}
#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 ssize_t h3_process_event(struct Curl_cfilter *cf,
struct Curl_easy *data,
char *buf, size_t len,
int64_t stream3_id,
quiche_h3_event *ev,
CURLcode *err)
{
struct HTTP *stream = data->req.p.http;
ssize_t recvd = 0;
int rc;
struct h3h1header headers;
DEBUGASSERT(stream3_id == stream->stream3_id);
*err = CURLE_OK;
switch(quiche_h3_event_type(ev)) {
case QUICHE_H3_EVENT_HEADERS:
stream->h3_got_header = TRUE;
headers.dest = buf;
headers.destlen = len;
headers.nlen = 0;
rc = quiche_h3_event_for_each_header(ev, cb_each_header, &headers);
if(rc) {
failf(data, "Error %d in HTTP/3 response header for stream[%"PRId64"]",
rc, stream3_id);
*err = CURLE_RECV_ERROR;
recvd = -1;
break;
}
recvd = headers.nlen;
DEBUGF(LOG_CF(data, cf, "[h3sid=%"PRId64"][HEADERS] len=%zd",
stream3_id, recvd));
break;
case QUICHE_H3_EVENT_DATA:
DEBUGASSERT(!stream->closed);
stream->h3_recving_data = TRUE;
recvd = cf_recv_body(cf, data, buf, len, err);
if(recvd < 0) {
if(*err != CURLE_AGAIN)
return -1;
recvd = 0;
}
break;
case QUICHE_H3_EVENT_RESET:
DEBUGF(LOG_CF(data, cf, "[h3sid=%"PRId64"][RESET]", stream3_id));
stream->closed = TRUE;
stream->reset = TRUE;
/* streamclose(cf->conn, "Reset of stream");*/
stream->h3_recving_data = FALSE;
break;
case QUICHE_H3_EVENT_FINISHED:
DEBUGF(LOG_CF(data, cf, "[h3sid=%"PRId64"][FINISHED]", stream3_id));
stream->closed = TRUE;
/* streamclose(cf->conn, "End of stream");*/
stream->h3_recving_data = FALSE;
break;
case QUICHE_H3_EVENT_GOAWAY:
DEBUGF(LOG_CF(data, cf, "[h3sid=%"PRId64"][GOAWAY]", stream3_id));
break;
default:
DEBUGF(LOG_CF(data, cf, "[h3sid=%"PRId64"] recv, unhandled event %d",
stream3_id, quiche_h3_event_type(ev)));
break;
}
return recvd;
}
static ssize_t h3_process_pending(struct Curl_cfilter *cf,
struct Curl_easy *data,
char *buf, size_t len,
CURLcode *err)
{
struct HTTP *stream = data->req.p.http;
struct h3_event_node *node = stream->pending, **pnext = &stream->pending;
ssize_t recvd = 0, erecvd;
*err = CURLE_OK;
DEBUGASSERT(stream);
while(node && len) {
erecvd = h3_process_event(cf, data, buf, len,
stream->stream3_id, node->ev, err);
quiche_h3_event_free(node->ev);
*pnext = node->next;
free(node);
node = *pnext;
if(erecvd < 0) {
DEBUGF(LOG_CF(data, cf, "[h3sid=%"PRId64"] process event -> %d",
stream->stream3_id, *err));
return erecvd;
}
recvd += erecvd;
*err = CURLE_OK;
buf += erecvd;
len -= erecvd;
}
return recvd;
}
static CURLcode cf_process_ingress(struct Curl_cfilter *cf,
struct Curl_easy *data)
{
struct cf_quiche_ctx *ctx = cf->ctx;
int64_t stream3_id = data->req.p.http? data->req.p.http->stream3_id : -1;
uint8_t buf[65536];
int bufsize = (int)sizeof(buf);
struct sockaddr_storage remote_addr;
socklen_t remote_addrlen;
quiche_recv_info recv_info;
ssize_t recvd, nread;
ssize_t total = 0, pkts = 0;
DEBUGASSERT(ctx->qconn);
/* in case the timeout expired */
quiche_conn_on_timeout(ctx->qconn);
do {
remote_addrlen = sizeof(remote_addr);
while((recvd = recvfrom(ctx->q.sockfd, (char *)buf, bufsize, 0,
(struct sockaddr *)&remote_addr,
&remote_addrlen)) == -1 &&
SOCKERRNO == EINTR)
;
if(recvd < 0) {
if((SOCKERRNO == EAGAIN) || (SOCKERRNO == EWOULDBLOCK)) {
break;
}
if(SOCKERRNO == ECONNREFUSED) {
const char *r_ip;
int r_port;
Curl_cf_socket_peek(cf->next, data, NULL, NULL,
&r_ip, &r_port, NULL, NULL);
failf(data, "quiche: connection to %s:%u refused",
r_ip, r_port);
return CURLE_COULDNT_CONNECT;
}
failf(data, "quiche: recvfrom() unexpectedly returned %zd "
"(errno: %d, socket %d)", recvd, SOCKERRNO, ctx->q.sockfd);
return CURLE_RECV_ERROR;
}
total += recvd;
++pkts;
if(recvd > 0 && !ctx->got_first_byte) {
ctx->first_byte_at = Curl_now();
ctx->got_first_byte = TRUE;
}
recv_info.from = (struct sockaddr *) &remote_addr;
recv_info.from_len = remote_addrlen;
recv_info.to = (struct sockaddr *) &ctx->q.local_addr;
recv_info.to_len = ctx->q.local_addrlen;
nread = quiche_conn_recv(ctx->qconn, buf, recvd, &recv_info);
if(nread < 0) {
if(QUICHE_ERR_DONE == nread) {
DEBUGF(LOG_CF(data, cf, "ingress, quiche is DONE"));
return CURLE_OK;
}
else if(QUICHE_ERR_TLS_FAIL == nread) {
long verify_ok = SSL_get_verify_result(ctx->ssl);
if(verify_ok != X509_V_OK) {
failf(data, "SSL certificate problem: %s",
X509_verify_cert_error_string(verify_ok));
return CURLE_PEER_FAILED_VERIFICATION;
}
}
else {
failf(data, "quiche_conn_recv() == %zd", nread);
return CURLE_RECV_ERROR;
}
}
else if(nread < recvd) {
DEBUGF(LOG_CF(data, cf, "[h3sid=%" PRId64 "] ingress, quiche only "
"accepted %zd/%zd bytes",
stream3_id, nread, recvd));
}
} while(pkts < 1000); /* arbitrary */
DEBUGF(LOG_CF(data, cf, "[h3sid=%" PRId64 "] ingress, recvd %zd bytes "
"in %zd packets", stream3_id, total, pkts));
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;
int64_t stream3_id = data->req.p.http? data->req.p.http->stream3_id : -1;
quiche_send_info send_info;
ssize_t outlen, total_len = 0;
size_t max_udp_payload_size =
quiche_conn_max_send_udp_payload_size(ctx->qconn);
size_t gsolen = max_udp_payload_size;
size_t sent, pktcnt = 0;
CURLcode result;
int64_t timeout_ns;
ctx->q.no_gso = TRUE;
if(ctx->q.num_blocked_pkt) {
result = vquic_send_blocked_pkt(cf, data, &ctx->q);
if(result) {
if(result == CURLE_AGAIN) {
DEBUGF(LOG_CF(data, cf, "[h3sid=%" PRId64 "] egress, still not "
"able to send blocked packet", stream3_id));
Curl_expire(data, 1, EXPIRE_QUIC);
return CURLE_OK;
}
goto out;
}
}
for(;;) {
outlen = quiche_conn_send(ctx->qconn, ctx->q.pktbuf, max_udp_payload_size,
&send_info);
if(outlen == QUICHE_ERR_DONE) {
result = CURLE_OK;
goto out;
}
if(outlen < 0) {
failf(data, "quiche_conn_send returned %zd", outlen);
result = CURLE_SEND_ERROR;
goto out;
}
/* send the pktbuf *before* the last addition */
result = vquic_send_packet(cf, data, &ctx->q, ctx->q.pktbuf,
outlen, gsolen, &sent);
++pktcnt;
total_len += outlen;
if(result) {
if(result == CURLE_AGAIN) {
/* blocked, add the pktbuf *before* and *at* the last addition
* separately to the blocked packages */
DEBUGF(LOG_CF(data, cf, "[h3sid=%" PRId64 "] egress, pushing blocked "
"packet with %zd bytes", stream3_id, outlen));
vquic_push_blocked_pkt(cf, &ctx->q, ctx->q.pktbuf, outlen, gsolen);
Curl_expire(data, 1, EXPIRE_QUIC);
return CURLE_OK;
}
goto out;
}
}
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);
if(pktcnt)
DEBUGF(LOG_CF(data, cf, "[h3sid=%" PRId64 "] egress, sent %zd packets "
"with %zd bytes", stream3_id, pktcnt, total_len));
return result;
}
static ssize_t recv_closed_stream(struct Curl_cfilter *cf,
struct Curl_easy *data,
CURLcode *err)
{
struct HTTP *stream = data->req.p.http;
ssize_t nread = -1;
if(stream->reset) {
failf(data,
"HTTP/3 stream %" PRId64 " reset by server", stream->stream3_id);
*err = stream->h3_got_header? CURLE_PARTIAL_FILE : CURLE_RECV_ERROR;
DEBUGF(LOG_CF(data, cf, "[h3sid=%" PRId64 "] cf_recv, was reset -> %d",
stream->stream3_id, *err));
goto out;
}
if(!stream->h3_got_header) {
failf(data,
"HTTP/3 stream %" PRId64 " was closed cleanly, but before getting"
" all response header fields, treated as error",
stream->stream3_id);
/* *err = CURLE_PARTIAL_FILE; */
*err = CURLE_RECV_ERROR;
DEBUGF(LOG_CF(data, cf, "[h3sid=%" PRId64 "] cf_recv, closed incomplete"
" -> %d", stream->stream3_id, *err));
goto out;
}
else {
DEBUGF(LOG_CF(data, cf, "[h3sid=%" PRId64 "] cf_recv, closed ok"
" -> %d", stream->stream3_id, *err));
}
*err = CURLE_OK;
nread = 0;
out:
return nread;
}
static CURLcode cf_poll_events(struct Curl_cfilter *cf,
struct Curl_easy *data)
{
struct cf_quiche_ctx *ctx = cf->ctx;
struct HTTP *stream = data->req.p.http;
quiche_h3_event *ev;
/* Take in the events and distribute them to the transfers. */
while(1) {
int64_t stream3_id = quiche_h3_conn_poll(ctx->h3c, ctx->qconn, &ev);
if(stream3_id < 0) {
/* nothing more to do */
break;
}
DEBUGF(LOG_CF(data, cf, "[h3sid=%"PRId64"] recv, queue event %s "
"for [h3sid=%"PRId64"]",
stream? stream->stream3_id : -1, cf_ev_name(ev),
stream3_id));
if(h3_add_event(cf, data, stream3_id, ev) != CURLE_OK) {
return CURLE_OUT_OF_MEMORY;
}
}
return CURLE_OK;
}
static ssize_t cf_recv_transfer_data(struct Curl_cfilter *cf,
struct Curl_easy *data,
char *buf, size_t len,
CURLcode *err)
{
struct HTTP *stream = data->req.p.http;
ssize_t recvd = -1;
size_t offset = 0;
if(stream->h3_recving_data) {
/* try receiving body first */
recvd = cf_recv_body(cf, data, buf, len, err);
if(recvd < 0) {
if(*err != CURLE_AGAIN)
return -1;
recvd = 0;
}
if(recvd > 0) {
offset = recvd;
}
}
if(offset < len && stream->pending) {
/* process any pending events for `data` first. if there are,
* return so the transfer can handle those. We do not want to
* progress ingress while events are pending here. */
recvd = h3_process_pending(cf, data, buf + offset, len - offset, err);
if(recvd < 0) {
if(*err != CURLE_AGAIN)
return -1;
recvd = 0;
}
if(recvd > 0) {
offset += recvd;
}
}
if(offset) {
*err = CURLE_OK;
return offset;
}
*err = CURLE_AGAIN;
return 0;
}
static ssize_t cf_quiche_recv(struct Curl_cfilter *cf, struct Curl_easy *data,
char *buf, size_t len, CURLcode *err)
{
struct HTTP *stream = data->req.p.http;
ssize_t recvd = -1;
*err = CURLE_AGAIN;
recvd = cf_recv_transfer_data(cf, data, buf, len, err);
if(recvd)
goto out;
if(stream->closed) {
recvd = recv_closed_stream(cf, data, err);
goto out;
}
/* we did get nothing from the quiche buffers or pending events.
* Take in more data from the connection, any error is fatal */
if(cf_process_ingress(cf, data)) {
DEBUGF(LOG_CF(data, cf, "h3_stream_recv returns on ingress"));
*err = CURLE_RECV_ERROR;
recvd = -1;
goto out;
}
/* poll quiche and distribute the events to the transfers */
*err = cf_poll_events(cf, data);
if(*err) {
recvd = -1;
goto out;
}
/* try to receive again for this transfer */
recvd = cf_recv_transfer_data(cf, data, buf, len, err);
if(recvd)
goto out;
if(stream->closed) {
recvd = recv_closed_stream(cf, data, err);
goto out;
}
recvd = -1;
*err = CURLE_AGAIN;
data->state.drain = 0;
out:
if(cf_flush_egress(cf, data)) {
DEBUGF(LOG_CF(data, cf, "cf_recv, flush egress failed"));
*err = CURLE_SEND_ERROR;
return -1;
}
DEBUGF(LOG_CF(data, cf, "[h3sid=%"PRId64"] cf_recv -> %zd, err=%d",
stream->stream3_id, recvd, *err));
if(recvd > 0)
notify_drain(cf, data);
return recvd;
}
/* Index where :authority header field will appear in request header
field list. */
#define AUTHORITY_DST_IDX 3
static CURLcode cf_http_request(struct Curl_cfilter *cf,
struct Curl_easy *data,
const void *mem,
size_t len)
{
struct cf_quiche_ctx *ctx = cf->ctx;
struct HTTP *stream = data->req.p.http;
size_t nheader;
int64_t stream3_id;
quiche_h3_header *nva = NULL;
CURLcode result = CURLE_OK;
struct h2h3req *hreq = NULL;
stream->h3req = TRUE; /* send off! */
stream->closed = FALSE;
stream->reset = FALSE;
result = Curl_pseudo_headers(data, mem, len, NULL, &hreq);
if(result)
goto fail;
nheader = hreq->entries;
nva = malloc(sizeof(quiche_h3_header) * nheader);
if(!nva) {
result = CURLE_OUT_OF_MEMORY;
goto fail;
}
else {
unsigned int i;
for(i = 0; i < nheader; i++) {
nva[i].name = (unsigned char *)hreq->header[i].name;
nva[i].name_len = hreq->header[i].namelen;
nva[i].value = (unsigned char *)hreq->header[i].value;
nva[i].value_len = hreq->header[i].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, but not zero */
stream->upload_done = !stream->upload_left;
stream3_id = quiche_h3_send_request(ctx->h3c, ctx->qconn, nva, nheader,
stream->upload_done);
break;
default:
stream->upload_left = 0;
stream->upload_done = TRUE;
stream3_id = quiche_h3_send_request(ctx->h3c, ctx->qconn, nva, nheader,
TRUE);
break;
}
Curl_safefree(nva);
if(stream3_id < 0) {
if(QUICHE_H3_ERR_STREAM_BLOCKED == stream3_id) {
DEBUGF(LOG_CF(data, cf, "send_request(%s, body_len=%ld) rejected "
"with H3_ERR_STREAM_BLOCKED",
data->state.url, (long)stream->upload_left));
result = CURLE_AGAIN;
goto fail;
}
else {
DEBUGF(LOG_CF(data, cf, "send_request(%s, body_len=%ld) -> %" PRId64,
data->state.url, (long)stream->upload_left, stream3_id));
}
result = CURLE_SEND_ERROR;
goto fail;
}
stream->stream3_id = stream3_id;
infof(data, "Using HTTP/3 Stream ID: %" PRId64 " (easy handle %p)",
stream3_id, (void *)data);
DEBUGF(LOG_CF(data, cf, "[h3sid=%" PRId64 "] opened for %s",
stream3_id, data->state.url));
Curl_pseudo_free(hreq);
return CURLE_OK;
fail:
free(nva);
Curl_pseudo_free(hreq);
return result;
}
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 HTTP *stream = data->req.p.http;
ssize_t nwritten;
DEBUGF(LOG_CF(data, cf, "[h3sid=%" PRId64 "] cf_send(len=%zu) start",
stream->h3req? stream->stream3_id : -1, len));
*err = cf_process_ingress(cf, data);
if(*err)
return -1;
if(!stream->h3req) {
CURLcode result = cf_http_request(cf, data, buf, len);
if(result) {
*err = result;
return -1;
}
nwritten = len;
}
else {
nwritten = quiche_h3_send_body(ctx->h3c, ctx->qconn, stream->stream3_id,
(uint8_t *)buf, len, FALSE);
DEBUGF(LOG_CF(data, cf, "[h3sid=%" PRId64 "] send body(len=%zu) -> %zd",
stream->stream3_id, len, nwritten));
if(nwritten == QUICHE_H3_ERR_DONE) {
/* no error, nothing to do (flow control?) */
*err = CURLE_AGAIN;
nwritten = -1;
}
else if(nwritten == QUICHE_H3_TRANSPORT_ERR_FINAL_SIZE) {
DEBUGF(LOG_CF(data, cf, "send_body(len=%zu) -> exceeds size", len));
*err = CURLE_SEND_ERROR;
nwritten = -1;
}
else if(nwritten < 0) {
DEBUGF(LOG_CF(data, cf, "send_body(len=%zu) -> SEND_ERROR", len));
*err = CURLE_SEND_ERROR;
nwritten = -1;
}
else {
*err = CURLE_OK;
}
}
if(cf_flush_egress(cf, data)) {
*err = CURLE_SEND_ERROR;
return -1;
}
return nwritten;
}
static bool stream_is_writeable(struct Curl_cfilter *cf,
struct Curl_easy *data)
{
struct cf_quiche_ctx *ctx = cf->ctx;
struct HTTP *stream = data->req.p.http;
/* surely, there must be a better way */
quiche_stream_iter *qiter = quiche_conn_writable(ctx->qconn);
if(qiter) {
uint64_t stream_id;
while(quiche_stream_iter_next(qiter, &stream_id)) {
if(stream_id == (uint64_t)stream->stream3_id)
return TRUE;
}
quiche_stream_iter_free(qiter);
}
return FALSE;
}
static int cf_quiche_get_select_socks(struct Curl_cfilter *cf,
struct Curl_easy *data,
curl_socket_t *socks)
{
struct cf_quiche_ctx *ctx = cf->ctx;
struct SingleRequest *k = &data->req;
int rv = GETSOCK_BLANK;
socks[0] = ctx->q.sockfd;
/* in an HTTP/3 connection we can basically always get a frame so we should
always be ready for one */
rv |= GETSOCK_READSOCK(0);
/* we're still uploading or the HTTP/3 layer wants to send data */
if(((k->keepon & KEEP_SENDBITS) == KEEP_SEND)
&& stream_is_writeable(cf, data))
rv |= GETSOCK_WRITESOCK(0);
return rv;
}
/*
* Called from transfer.c:data_pending to know if we should keep looping
* to receive more data from the connection.
*/
static bool cf_quiche_data_pending(struct Curl_cfilter *cf,
const struct Curl_easy *data)
{
struct HTTP *stream = data->req.p.http;
if(stream->pending) {
DEBUGF(LOG_CF((struct Curl_easy *)data, cf,
"[h3sid=%"PRId64"] has event pending", stream->stream3_id));
return TRUE;
}
if(stream->h3_recving_data) {
DEBUGF(LOG_CF((struct Curl_easy *)data, cf,
"[h3sid=%"PRId64"] is receiving DATA", stream->stream3_id));
return TRUE;
}
if(data->state.drain) {
DEBUGF(LOG_CF((struct Curl_easy *)data, cf,
"[h3sid=%"PRId64"] is draining", stream->stream3_id));
return TRUE;
}
return FALSE;
}
static CURLcode cf_quiche_data_event(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_DONE: {
struct HTTP *stream = data->req.p.http;
DEBUGF(LOG_CF(data, cf, "[h3sid=%"PRId64"] easy handle is %s",
stream->stream3_id, arg1? "cancelled" : "done"));
h3_clear_pending(data);
break;
}
case CF_CTRL_DATA_DONE_SEND: {
struct HTTP *stream = data->req.p.http;
ssize_t sent;
stream->upload_done = TRUE;
sent = quiche_h3_send_body(ctx->h3c, ctx->qconn, stream->stream3_id,
NULL, 0, TRUE);
DEBUGF(LOG_CF(data, cf, "[h3sid=%"PRId64"] send_body FINISHED",
stream->stream3_id));
if(sent < 0)
return CURLE_SEND_ERROR;
break;
}
case CF_CTRL_DATA_IDLE:
/* anything to do? */
break;
default:
break;
}
return result;
}
static CURLcode cf_verify_peer(struct Curl_cfilter *cf,
struct Curl_easy *data)
{
struct cf_quiche_ctx *ctx = cf->ctx;
CURLcode result = CURLE_OK;
cf->conn->bits.multiplex = TRUE; /* at least potentially multiplexed */
cf->conn->httpversion = 30;
cf->conn->bundle->multiuse = BUNDLE_MULTIPLEX;
if(cf->conn->ssl_config.verifyhost) {
X509 *server_cert;
server_cert = SSL_get_peer_certificate(ctx->ssl);
if(!server_cert) {
result = CURLE_PEER_FAILED_VERIFICATION;
goto out;
}
result = Curl_ossl_verifyhost(data, cf->conn, server_cert);
X509_free(server_cert);
if(result)
goto out;
}
else
DEBUGF(LOG_CF(data, cf, "Skipped certificate verification"));
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;
}
if(data->set.ssl.certinfo)
/* asked to gather certificate info */
(void)Curl_ossl_certchain(data, ctx->ssl);
out:
if(result) {
if(ctx->h3config) {
quiche_h3_config_free(ctx->h3config);
ctx->h3config = NULL;
}
if(ctx->h3c) {
quiche_h3_conn_free(ctx->h3c);
ctx->h3c = NULL;
}
}
return result;
}
static CURLcode cf_connect_start(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;
DEBUGASSERT(ctx->q.sockfd != CURL_SOCKET_BAD);
#ifdef DEBUG_QUICHE
/* initialize debug log callback only once */
static int debug_log_init = 0;
if(!debug_log_init) {
quiche_enable_debug_logging(quiche_debug_log, NULL);
debug_log_init = 1;
}
#endif
result = vquic_ctx_init(&ctx->q, MAX_UDP_PAYLOAD_SIZE * MAX_PKT_BURST);
if(result)
return result;
ctx->cfg = quiche_config_new(QUICHE_PROTOCOL_VERSION);
if(!ctx->cfg) {
failf(data, "can't create quiche config");
return CURLE_FAILED_INIT;
}
quiche_config_set_max_idle_timeout(ctx->cfg, QUIC_IDLE_TIMEOUT);
quiche_config_set_initial_max_data(ctx->cfg, QUIC_MAX_DATA);
quiche_config_set_initial_max_stream_data_bidi_local(
ctx->cfg, QUIC_MAX_DATA);
quiche_config_set_initial_max_stream_data_bidi_remote(
ctx->cfg, QUIC_MAX_DATA);
quiche_config_set_initial_max_stream_data_uni(ctx->cfg, QUIC_MAX_DATA);
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_application_protos(ctx->cfg,
(uint8_t *)
QUICHE_H3_APPLICATION_PROTOCOL,
sizeof(QUICHE_H3_APPLICATION_PROTOCOL)
- 1);
DEBUGASSERT(!ctx->ssl);
DEBUGASSERT(!ctx->sslctx);
ctx->sslctx = quic_ssl_ctx(data);
if(!ctx->sslctx)
return CURLE_QUIC_CONNECT_ERROR;
ctx->ssl = SSL_new(ctx->sslctx);
if(!ctx->ssl)
return CURLE_QUIC_CONNECT_ERROR;
SSL_set_app_data(ctx->ssl, cf);
SSL_set_tlsext_host_name(ctx->ssl, cf->conn->host.name);
result = Curl_rand(data, ctx->scid, sizeof(ctx->scid));
if(result)
return result;
Curl_cf_socket_peek(cf->next, data, &ctx->q.sockfd,
&sockaddr, NULL, NULL, NULL, NULL);
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->sa_addr, sockaddr->addrlen,
ctx->cfg, ctx->ssl, false);
if(!ctx->qconn) {
failf(data, "can't 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;
}
DEBUGF(LOG_CF(data, cf, "Sent QUIC client Initial, ALPN: %s",
alpn_protocols + 1));
}
return CURLE_OK;
}
static CURLcode cf_quiche_connect(struct Curl_cfilter *cf,
struct Curl_easy *data,
bool blocking, bool *done)
{
struct cf_quiche_ctx *ctx = cf->ctx;
CURLcode result = CURLE_OK;
struct curltime now;
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, blocking, done);
if(result || !*done)
return result;
}
*done = FALSE;
now = Curl_now();
if(ctx->reconnect_at.tv_sec && Curl_timediff(now, ctx->reconnect_at) < 0) {
/* Not time yet to attempt the next connect */
DEBUGF(LOG_CF(data, cf, "waiting for reconnect time"));
goto out;
}
if(!ctx->qconn) {
result = cf_connect_start(cf, data);
if(result)
goto out;
ctx->started_at = now;
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)) {
DEBUGF(LOG_CF(data, cf, "handshake complete after %dms",
(int)Curl_timediff(now, ctx->started_at)));
ctx->handshake_at = now;
result = cf_verify_peer(cf, data);
if(!result) {
DEBUGF(LOG_CF(data, cf, "peer verified"));
cf->connected = TRUE;
cf->conn->alpn = CURL_HTTP_VERSION_3;
*done = TRUE;
connkeep(cf->conn, "HTTP/3 default");
}
}
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.
* This may be a stopping of the service or it may be that the server
* is reloading and a new instance will start serving soon.
* In any case, we tear down our socket and start over with a new one.
* We re-open the underlying UDP cf right now, but do not start
* connecting until called again.
*/
int reconn_delay_ms = 200;
DEBUGF(LOG_CF(data, cf, "connect, remote closed, reconnect after %dms",
reconn_delay_ms));
Curl_conn_cf_close(cf->next, data);
cf_quiche_ctx_clear(ctx);
result = Curl_conn_cf_connect(cf->next, data, FALSE, done);
if(!result && *done) {
*done = FALSE;
ctx->reconnect_at = Curl_now();
ctx->reconnect_at.tv_usec += reconn_delay_ms * 1000;
Curl_expire(data, reconn_delay_ms, EXPIRE_QUIC);
result = CURLE_OK;
}
}
out:
#ifndef CURL_DISABLE_VERBOSE_STRINGS
if(result && result != CURLE_AGAIN) {
const char *r_ip;
int r_port;
Curl_cf_socket_peek(cf->next, data, NULL, NULL,
&r_ip, &r_port, NULL, NULL);
infof(data, "connect to %s port %u failed: %s",
r_ip, r_port, curl_easy_strerror(result));
}
#endif
return result;
}
static void cf_quiche_close(struct Curl_cfilter *cf, struct Curl_easy *data)
{
struct cf_quiche_ctx *ctx = cf->ctx;
(void)data;
if(ctx) {
if(ctx->qconn) {
(void)quiche_conn_close(ctx->qconn, TRUE, 0, NULL, 0);
/* flushing the egress is not a failsafe way to deliver all the
outstanding packets, but we also don't want to get stuck here... */
(void)cf_flush_egress(cf, data);
}
cf_quiche_ctx_clear(ctx);
}
}
static void cf_quiche_destroy(struct Curl_cfilter *cf, struct Curl_easy *data)
{
struct cf_quiche_ctx *ctx = cf->ctx;
(void)data;
cf_quiche_ctx_clear(ctx);
free(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 = CONN_INUSE(cf->conn);
if(!ctx->goaway) {
max_streams += quiche_conn_peer_streams_left_bidi(ctx->qconn);
}
*pres1 = (max_streams > INT_MAX)? INT_MAX : (int)max_streams;
DEBUGF(LOG_CF(data, cf, "query: MAX_CONCURRENT -> %d", *pres1));
return CURLE_OK;
}
case CF_QUERY_CONNECT_REPLY_MS:
if(ctx->got_first_byte) {
timediff_t ms = Curl_timediff(ctx->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->got_first_byte)
*when = ctx->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;
}
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)
{
bool alive = TRUE;
*input_pending = FALSE;
if(!cf->next || !cf->next->cft->is_alive(cf->next, data, input_pending))
return FALSE;
if(*input_pending) {
/* This happens before we've sent off a request and the connection is
not in use by any other transfer, there shouldn't be any data here,
only "protocol frames" */
*input_pending = FALSE;
Curl_attach_connection(data, cf->conn);
if(cf_process_ingress(cf, data))
alive = FALSE;
else {
alive = TRUE;
}
Curl_detach_connection(data);
}
return alive;
}
struct Curl_cftype Curl_cft_http3 = {
"HTTP/3",
CF_TYPE_IP_CONNECT | CF_TYPE_SSL | CF_TYPE_MULTIPLEX,
0,
cf_quiche_destroy,
cf_quiche_connect,
cf_quiche_close,
Curl_cf_def_get_host,
cf_quiche_get_select_socks,
cf_quiche_data_pending,
cf_quiche_send,
cf_quiche_recv,
cf_quiche_data_event,
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, *udp_cf = NULL;
CURLcode result;
(void)data;
(void)conn;
ctx = calloc(sizeof(*ctx), 1);
if(!ctx) {
result = CURLE_OUT_OF_MEMORY;
goto out;
}
result = Curl_cf_create(&cf, &Curl_cft_http3, ctx);
if(result)
goto out;
result = Curl_cf_udp_create(&udp_cf, data, conn, ai, TRNSPRT_QUIC);
if(result)
goto out;
udp_cf->conn = cf->conn;
udp_cf->sockindex = cf->sockindex;
cf->next = udp_cf;
out:
*pcf = (!result)? cf : NULL;
if(result) {
if(udp_cf)
Curl_conn_cf_discard(udp_cf, data);
Curl_safefree(cf);
Curl_safefree(ctx);
}
return result;
}
bool Curl_conn_is_quiche(const struct Curl_easy *data,
const struct connectdata *conn,
int sockindex)
{
struct Curl_cfilter *cf = conn? conn->cfilter[sockindex] : NULL;
(void)data;
for(; cf; cf = cf->next) {
if(cf->cft == &Curl_cft_http3)
return TRUE;
if(cf->cft->flags & CF_TYPE_IP_CONNECT)
return FALSE;
}
return FALSE;
}
#endif
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