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curl-w32/lib/cf-https-connect.c

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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_HYPER)
#include "urldata.h"
#include <curl/curl.h>
#include "curl_trc.h"
#include "cfilters.h"
#include "connect.h"
#include "multiif.h"
#include "cf-https-connect.h"
#include "http2.h"
#include "vquic/vquic.h"
/* The last 3 #include files should be in this order */
#include "curl_printf.h"
#include "curl_memory.h"
#include "memdebug.h"
typedef enum {
CF_HC_INIT,
CF_HC_CONNECT,
CF_HC_SUCCESS,
CF_HC_FAILURE
} cf_hc_state;
struct cf_hc_baller {
const char *name;
struct Curl_cfilter *cf;
CURLcode result;
struct curltime started;
int reply_ms;
bool enabled;
};
static void cf_hc_baller_reset(struct cf_hc_baller *b,
struct Curl_easy *data)
{
if(b->cf) {
Curl_conn_cf_close(b->cf, data);
Curl_conn_cf_discard_chain(&b->cf, data);
b->cf = NULL;
}
b->result = CURLE_OK;
b->reply_ms = -1;
}
static bool cf_hc_baller_is_active(struct cf_hc_baller *b)
{
return b->enabled && b->cf && !b->result;
}
static bool cf_hc_baller_has_started(struct cf_hc_baller *b)
{
return !!b->cf;
}
static int cf_hc_baller_reply_ms(struct cf_hc_baller *b,
struct Curl_easy *data)
{
if(b->reply_ms < 0)
b->cf->cft->query(b->cf, data, CF_QUERY_CONNECT_REPLY_MS,
&b->reply_ms, NULL);
return b->reply_ms;
}
static bool cf_hc_baller_data_pending(struct cf_hc_baller *b,
const struct Curl_easy *data)
{
return b->cf && !b->result && b->cf->cft->has_data_pending(b->cf, data);
}
struct cf_hc_ctx {
cf_hc_state state;
const struct Curl_dns_entry *remotehost;
struct curltime started; /* when connect started */
CURLcode result; /* overall result */
struct cf_hc_baller h3_baller;
struct cf_hc_baller h21_baller;
int soft_eyeballs_timeout_ms;
int hard_eyeballs_timeout_ms;
};
static void cf_hc_baller_init(struct cf_hc_baller *b,
struct Curl_cfilter *cf,
struct Curl_easy *data,
const char *name,
int transport)
{
struct cf_hc_ctx *ctx = cf->ctx;
struct Curl_cfilter *save = cf->next;
b->name = name;
cf->next = NULL;
b->started = Curl_now();
b->result = Curl_cf_setup_insert_after(cf, data, ctx->remotehost,
transport, CURL_CF_SSL_ENABLE);
b->cf = cf->next;
cf->next = save;
}
static CURLcode cf_hc_baller_connect(struct cf_hc_baller *b,
struct Curl_cfilter *cf,
struct Curl_easy *data,
bool *done)
{
struct Curl_cfilter *save = cf->next;
cf->next = b->cf;
b->result = Curl_conn_cf_connect(cf->next, data, FALSE, done);
b->cf = cf->next; /* it might mutate */
cf->next = save;
return b->result;
}
static void cf_hc_reset(struct Curl_cfilter *cf, struct Curl_easy *data)
{
struct cf_hc_ctx *ctx = cf->ctx;
if(ctx) {
cf_hc_baller_reset(&ctx->h3_baller, data);
cf_hc_baller_reset(&ctx->h21_baller, data);
ctx->state = CF_HC_INIT;
ctx->result = CURLE_OK;
ctx->hard_eyeballs_timeout_ms = data->set.happy_eyeballs_timeout;
ctx->soft_eyeballs_timeout_ms = data->set.happy_eyeballs_timeout / 2;
}
}
static CURLcode baller_connected(struct Curl_cfilter *cf,
struct Curl_easy *data,
struct cf_hc_baller *winner)
{
struct cf_hc_ctx *ctx = cf->ctx;
CURLcode result = CURLE_OK;
DEBUGASSERT(winner->cf);
if(winner != &ctx->h3_baller)
cf_hc_baller_reset(&ctx->h3_baller, data);
if(winner != &ctx->h21_baller)
cf_hc_baller_reset(&ctx->h21_baller, data);
CURL_TRC_CF(data, cf, "connect+handshake %s: %dms, 1st data: %dms",
winner->name, (int)Curl_timediff(Curl_now(), winner->started),
cf_hc_baller_reply_ms(winner, data));
cf->next = winner->cf;
winner->cf = NULL;
switch(cf->conn->alpn) {
case CURL_HTTP_VERSION_3:
infof(data, "using HTTP/3");
break;
case CURL_HTTP_VERSION_2:
#ifdef USE_NGHTTP2
/* Using nghttp2, we add the filter "below" us, so when the conn
* closes, we tear it down for a fresh reconnect */
result = Curl_http2_switch_at(cf, data);
if(result) {
ctx->state = CF_HC_FAILURE;
ctx->result = result;
return result;
}
#endif
infof(data, "using HTTP/2");
break;
default:
infof(data, "using HTTP/1.x");
break;
}
ctx->state = CF_HC_SUCCESS;
cf->connected = TRUE;
Curl_conn_cf_cntrl(cf->next, data, TRUE,
CF_CTRL_CONN_INFO_UPDATE, 0, NULL);
return result;
}
static bool time_to_start_h21(struct Curl_cfilter *cf,
struct Curl_easy *data,
struct curltime now)
{
struct cf_hc_ctx *ctx = cf->ctx;
timediff_t elapsed_ms;
if(!ctx->h21_baller.enabled || cf_hc_baller_has_started(&ctx->h21_baller))
return FALSE;
if(!ctx->h3_baller.enabled || !cf_hc_baller_is_active(&ctx->h3_baller))
return TRUE;
elapsed_ms = Curl_timediff(now, ctx->started);
if(elapsed_ms >= ctx->hard_eyeballs_timeout_ms) {
CURL_TRC_CF(data, cf, "hard timeout of %dms reached, starting h21",
ctx->hard_eyeballs_timeout_ms);
return TRUE;
}
if(elapsed_ms >= ctx->soft_eyeballs_timeout_ms) {
if(cf_hc_baller_reply_ms(&ctx->h3_baller, data) < 0) {
CURL_TRC_CF(data, cf, "soft timeout of %dms reached, h3 has not "
"seen any data, starting h21",
ctx->soft_eyeballs_timeout_ms);
return TRUE;
}
/* set the effective hard timeout again */
Curl_expire(data, ctx->hard_eyeballs_timeout_ms - elapsed_ms,
EXPIRE_ALPN_EYEBALLS);
}
return FALSE;
}
static CURLcode cf_hc_connect(struct Curl_cfilter *cf,
struct Curl_easy *data,
bool blocking, bool *done)
{
struct cf_hc_ctx *ctx = cf->ctx;
struct curltime now;
CURLcode result = CURLE_OK;
(void)blocking;
if(cf->connected) {
*done = TRUE;
return CURLE_OK;
}
*done = FALSE;
now = Curl_now();
switch(ctx->state) {
case CF_HC_INIT:
DEBUGASSERT(!ctx->h3_baller.cf);
DEBUGASSERT(!ctx->h21_baller.cf);
DEBUGASSERT(!cf->next);
CURL_TRC_CF(data, cf, "connect, init");
ctx->started = now;
if(ctx->h3_baller.enabled) {
cf_hc_baller_init(&ctx->h3_baller, cf, data, "h3", TRNSPRT_QUIC);
if(ctx->h21_baller.enabled)
Curl_expire(data, ctx->soft_eyeballs_timeout_ms, EXPIRE_ALPN_EYEBALLS);
}
else if(ctx->h21_baller.enabled)
cf_hc_baller_init(&ctx->h21_baller, cf, data, "h21",
cf->conn->transport);
ctx->state = CF_HC_CONNECT;
FALLTHROUGH();
case CF_HC_CONNECT:
if(cf_hc_baller_is_active(&ctx->h3_baller)) {
result = cf_hc_baller_connect(&ctx->h3_baller, cf, data, done);
if(!result && *done) {
result = baller_connected(cf, data, &ctx->h3_baller);
goto out;
}
}
if(time_to_start_h21(cf, data, now)) {
cf_hc_baller_init(&ctx->h21_baller, cf, data, "h21",
cf->conn->transport);
}
if(cf_hc_baller_is_active(&ctx->h21_baller)) {
CURL_TRC_CF(data, cf, "connect, check h21");
result = cf_hc_baller_connect(&ctx->h21_baller, cf, data, done);
if(!result && *done) {
result = baller_connected(cf, data, &ctx->h21_baller);
goto out;
}
}
if((!ctx->h3_baller.enabled || ctx->h3_baller.result) &&
(!ctx->h21_baller.enabled || ctx->h21_baller.result)) {
/* both failed or disabled. we give up */
CURL_TRC_CF(data, cf, "connect, all failed");
result = ctx->result = ctx->h3_baller.enabled?
ctx->h3_baller.result : ctx->h21_baller.result;
ctx->state = CF_HC_FAILURE;
goto out;
}
result = CURLE_OK;
*done = FALSE;
break;
case CF_HC_FAILURE:
result = ctx->result;
cf->connected = FALSE;
*done = FALSE;
break;
case CF_HC_SUCCESS:
result = CURLE_OK;
cf->connected = TRUE;
*done = TRUE;
break;
}
out:
CURL_TRC_CF(data, cf, "connect -> %d, done=%d", result, *done);
return result;
}
static void cf_hc_adjust_pollset(struct Curl_cfilter *cf,
struct Curl_easy *data,
struct easy_pollset *ps)
{
if(!cf->connected) {
struct cf_hc_ctx *ctx = cf->ctx;
struct cf_hc_baller *ballers[2];
size_t i;
ballers[0] = &ctx->h3_baller;
ballers[1] = &ctx->h21_baller;
for(i = 0; i < sizeof(ballers)/sizeof(ballers[0]); i++) {
struct cf_hc_baller *b = ballers[i];
if(!cf_hc_baller_is_active(b))
continue;
Curl_conn_cf_adjust_pollset(b->cf, data, ps);
}
CURL_TRC_CF(data, cf, "adjust_pollset -> %d socks", ps->num);
}
}
static bool cf_hc_data_pending(struct Curl_cfilter *cf,
const struct Curl_easy *data)
{
struct cf_hc_ctx *ctx = cf->ctx;
if(cf->connected)
return cf->next->cft->has_data_pending(cf->next, data);
CURL_TRC_CF((struct Curl_easy *)data, cf, "data_pending");
return cf_hc_baller_data_pending(&ctx->h3_baller, data)
|| cf_hc_baller_data_pending(&ctx->h21_baller, data);
}
static struct curltime cf_get_max_baller_time(struct Curl_cfilter *cf,
struct Curl_easy *data,
int query)
{
struct cf_hc_ctx *ctx = cf->ctx;
struct Curl_cfilter *cfb;
struct curltime t, tmax;
memset(&tmax, 0, sizeof(tmax));
memset(&t, 0, sizeof(t));
cfb = ctx->h21_baller.enabled? ctx->h21_baller.cf : NULL;
if(cfb && !cfb->cft->query(cfb, data, query, NULL, &t)) {
if((t.tv_sec || t.tv_usec) && Curl_timediff_us(t, tmax) > 0)
tmax = t;
}
memset(&t, 0, sizeof(t));
cfb = ctx->h3_baller.enabled? ctx->h3_baller.cf : NULL;
if(cfb && !cfb->cft->query(cfb, data, query, NULL, &t)) {
if((t.tv_sec || t.tv_usec) && Curl_timediff_us(t, tmax) > 0)
tmax = t;
}
return tmax;
}
static CURLcode cf_hc_query(struct Curl_cfilter *cf,
struct Curl_easy *data,
int query, int *pres1, void *pres2)
{
if(!cf->connected) {
switch(query) {
case CF_QUERY_TIMER_CONNECT: {
struct curltime *when = pres2;
*when = cf_get_max_baller_time(cf, data, CF_QUERY_TIMER_CONNECT);
return CURLE_OK;
}
case CF_QUERY_TIMER_APPCONNECT: {
struct curltime *when = pres2;
*when = cf_get_max_baller_time(cf, data, CF_QUERY_TIMER_APPCONNECT);
return CURLE_OK;
}
default:
break;
}
}
return cf->next?
cf->next->cft->query(cf->next, data, query, pres1, pres2) :
CURLE_UNKNOWN_OPTION;
}
static void cf_hc_close(struct Curl_cfilter *cf, struct Curl_easy *data)
{
CURL_TRC_CF(data, cf, "close");
cf_hc_reset(cf, data);
cf->connected = FALSE;
if(cf->next) {
cf->next->cft->do_close(cf->next, data);
Curl_conn_cf_discard_chain(&cf->next, data);
}
}
static void cf_hc_destroy(struct Curl_cfilter *cf, struct Curl_easy *data)
{
struct cf_hc_ctx *ctx = cf->ctx;
(void)data;
CURL_TRC_CF(data, cf, "destroy");
cf_hc_reset(cf, data);
Curl_safefree(ctx);
}
struct Curl_cftype Curl_cft_http_connect = {
"HTTPS-CONNECT",
0,
CURL_LOG_LVL_NONE,
cf_hc_destroy,
cf_hc_connect,
cf_hc_close,
Curl_cf_def_get_host,
cf_hc_adjust_pollset,
cf_hc_data_pending,
Curl_cf_def_send,
Curl_cf_def_recv,
Curl_cf_def_cntrl,
Curl_cf_def_conn_is_alive,
Curl_cf_def_conn_keep_alive,
cf_hc_query,
};
static CURLcode cf_hc_create(struct Curl_cfilter **pcf,
struct Curl_easy *data,
const struct Curl_dns_entry *remotehost,
bool try_h3, bool try_h21)
{
struct Curl_cfilter *cf = NULL;
struct cf_hc_ctx *ctx;
CURLcode result = CURLE_OK;
(void)data;
ctx = calloc(1, sizeof(*ctx));
if(!ctx) {
result = CURLE_OUT_OF_MEMORY;
goto out;
}
ctx->remotehost = remotehost;
ctx->h3_baller.enabled = try_h3;
ctx->h21_baller.enabled = try_h21;
result = Curl_cf_create(&cf, &Curl_cft_http_connect, ctx);
if(result)
goto out;
ctx = NULL;
cf_hc_reset(cf, data);
out:
*pcf = result? NULL : cf;
free(ctx);
return result;
}
static CURLcode cf_http_connect_add(struct Curl_easy *data,
struct connectdata *conn,
int sockindex,
const struct Curl_dns_entry *remotehost,
bool try_h3, bool try_h21)
{
struct Curl_cfilter *cf;
CURLcode result = CURLE_OK;
DEBUGASSERT(data);
result = cf_hc_create(&cf, data, remotehost, try_h3, try_h21);
if(result)
goto out;
Curl_conn_cf_add(data, conn, sockindex, cf);
out:
return result;
}
CURLcode Curl_cf_https_setup(struct Curl_easy *data,
struct connectdata *conn,
int sockindex,
const struct Curl_dns_entry *remotehost)
{
bool try_h3 = FALSE, try_h21 = TRUE; /* defaults, for now */
CURLcode result = CURLE_OK;
(void)sockindex;
(void)remotehost;
if(!conn->bits.tls_enable_alpn)
goto out;
if(data->state.httpwant == CURL_HTTP_VERSION_3ONLY) {
result = Curl_conn_may_http3(data, conn);
if(result) /* can't do it */
goto out;
try_h3 = TRUE;
try_h21 = FALSE;
}
else if(data->state.httpwant >= CURL_HTTP_VERSION_3) {
/* We assume that silently not even trying H3 is ok here */
/* TODO: should we fail instead? */
try_h3 = (Curl_conn_may_http3(data, conn) == CURLE_OK);
try_h21 = TRUE;
}
result = cf_http_connect_add(data, conn, sockindex, remotehost,
try_h3, try_h21);
out:
return result;
}
#endif /* !defined(CURL_DISABLE_HTTP) && !defined(USE_HYPER) */
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