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/***************************************************************************
 *                                  _   _ ____  _
 *  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->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;
}