curl/lib/speedcheck.c

/***************************************************************************
 *                                  _   _ ____  _
 *  Project                     ___| | | |  _ \| |
 *                             / __| | | | |_) | |
 *                            | (__| |_| |  _ <| |___
 *                             \___|\___/|_| \_\_____|
 *
 * Copyright (C) 1998 - 2020, 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.
 *
 ***************************************************************************/

#include "curl_setup.h"

#include <curl/curl.h>
#include "urldata.h"
#include "sendf.h"
#include "multiif.h"
#include "speedcheck.h"

void Curl_speedinit(struct Curl_easy *data)
{
  memset(&data->state.keeps_speed, 0, sizeof(struct curltime));
}

/*
 * @unittest: 1606
 */
CURLcode Curl_speedcheck(struct Curl_easy *data,
                         struct curltime now)
{
  if(data->req.keepon & KEEP_RECV_PAUSE)
    /* A paused transfer is not qualified for speed checks */
    return CURLE_OK;

  if((data->progress.current_speed >= 0) && data->set.low_speed_time) {
    if(data->progress.current_speed < data->set.low_speed_limit) {
      if(!data->state.keeps_speed.tv_sec)
        /* under the limit at this very moment */
        data->state.keeps_speed = now;
      else {
        /* how long has it been under the limit */
        timediff_t howlong = Curl_timediff(now, data->state.keeps_speed);

        if(howlong >= data->set.low_speed_time * 1000) {
          /* too long */
          failf(data,
                "Operation too slow. "
                "Less than %ld bytes/sec transferred the last %ld seconds",
                data->set.low_speed_limit,
                data->set.low_speed_time);
          return CURLE_OPERATION_TIMEDOUT;
        }
      }
    }
    else
      /* faster right now */
      data->state.keeps_speed.tv_sec = 0;
  }

  if(data->set.low_speed_limit)
    /* if low speed limit is enabled, set the expire timer to make this
       connection's speed get checked again in a second */
    Curl_expire(data, 1000, EXPIRE_SPEEDCHECK);

  return CURLE_OK;
}