LXR iproute2/tc/m_estimator.c

   1/*
   2 * m_estimator.c        Parse/print estimator module options.
   3 *
   4 *              This program is free software; you can u32istribute it and/or
   5 *              modify it under the terms of the GNU General Public License
   6 *              as published by the Free Software Foundation; either version
   7 *              2 of the License, or (at your option) any later version.
   8 *
   9 * Authors:     Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
  10 *
  11 */
  12
  13#include <stdio.h>
  14#include <stdlib.h>
  15#include <unistd.h>
  16#include <fcntl.h>
  17#include <sys/socket.h>
  18#include <netinet/in.h>
  19#include <arpa/inet.h>
  20#include <string.h>
  21
  22#include "utils.h"
  23#include "tc_util.h"
  24#include "tc_common.h"
  25
  26static void est_help(void);
  27
  28static void est_help(void)
  29{
  30        fprintf(stderr,
  31                "Usage: ... estimator INTERVAL TIME-CONST\n"
  32                "  INTERVAL is interval between measurements\n"
  33                "  TIME-CONST is averaging time constant\n"
  34                "Example: ... est 1sec 8sec\n");
  35}
  36
  37int parse_estimator(int *p_argc, char ***p_argv, struct tc_estimator *est)
  38{
  39        int argc = *p_argc;
  40        char **argv = *p_argv;
  41        unsigned int A, time_const;
  42
  43        NEXT_ARG();
  44        if (est->ewma_log)
  45                duparg("estimator", *argv);
  46        if (matches(*argv, "help") == 0)
  47                est_help();
  48        if (get_time(&A, *argv))
  49                invarg("estimator", "invalid estimator interval");
  50        NEXT_ARG();
  51        if (matches(*argv, "help") == 0)
  52                est_help();
  53        if (get_time(&time_const, *argv))
  54                invarg("estimator", "invalid estimator time constant");
  55        if (tc_setup_estimator(A, time_const, est) < 0) {
  56                fprintf(stderr, "Error: estimator parameters are out of range.\n");
  57                return -1;
  58        }
  59        if (show_raw)
  60                fprintf(stderr, "[estimator i=%hhd e=%u]\n", est->interval, est->ewma_log);
  61        *p_argc = argc;
  62        *p_argv = argv;
  63        return 0;
  64}
  65