url.c

  conn->data->req.chunk=FALSE;
  conn->data->req.maxfd = (conn->sockfd>conn->writesockfd?
                           conn->sockfd:conn->writesockfd)+1;
  Curl_pgrsTime(conn->data, TIMER_PRETRANSFER);
}

CURLcode Curl_do(struct connectdata **connp, bool *done)
{
  CURLcode result=CURLE_OK;
  struct connectdata *conn = *connp;
  struct SessionHandle *data = conn->data;

  if(conn->handler->do_it) {
    /* generic protocol-specific function pointer set in curl_connect() */
    result = conn->handler->do_it(conn, done);

    /* This was formerly done in transfer.c, but we better do it here */
    if((CURLE_SEND_ERROR == result) && conn->bits.reuse) {
      /*
       * If the connection is using an easy handle, call reconnect
       * to re-establish the connection.  Otherwise, let the multi logic
       * figure out how to re-establish the connection.
       */
      if(!data->multi) {
        result = Curl_reconnect_request(connp);

        if(!result) {
          /* ... finally back to actually retry the DO phase */
          conn = *connp; /* re-assign conn since Curl_reconnect_request
                            creates a new connection */
          result = conn->handler->do_it(conn, done);
        }
      }
      else
        return result;
    }

    if(!result && *done)
      /* do_complete must be called after the protocol-specific DO function */
      do_complete(conn);
  }
  return result;
}

/*
 * Curl_do_more() is called during the DO_MORE multi state. It is basically a
 * second stage DO state which (wrongly) was introduced to support FTP's
 * second connection.
 *
 * TODO: A future libcurl should be able to work away this state.
 *
 * 'complete' can return 0 for incomplete, 1 for done and -1 for go back to
 * DOING state there's more work to do!
 */

CURLcode Curl_do_more(struct connectdata *conn, int *complete)
{
  CURLcode result=CURLE_OK;

  *complete = 0;

  if(conn->handler->do_more)
    result = conn->handler->do_more(conn, complete);

  if(!result && (*complete == 1))
    /* do_complete must be called after the protocol-specific DO function */
    do_complete(conn);

  return result;
}