LXR iproute2/tc/q

   1/*
   2 * q_drr.c              DRR.
   3 *
   4 *              This program is free software; you can redistribute 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:     Patrick McHardy <kaber@trash.net>
  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
  25static void explain(void)
  26{
  27        fprintf(stderr, "Usage: ... drr\n");
  28}
  29
  30static void explain2(void)
  31{
  32        fprintf(stderr, "Usage: ... drr quantum SIZE\n");
  33}
  34
  35
  36static int drr_parse_opt(struct qdisc_util *qu, int argc, char **argv,
  37                         struct nlmsghdr *n, const char *dev)
  38{
  39        while (argc) {
  40                if (strcmp(*argv, "help") == 0) {
  41                        explain();
  42                        return -1;
  43                } else {
  44                        fprintf(stderr, "What is \"%s\"?\n", *argv);
  45                        explain();
  46                        return -1;
  47                }
  48        }
  49        return 0;
  50}
  51
  52static int drr_parse_class_opt(struct qdisc_util *qu, int argc, char **argv,
  53                               struct nlmsghdr *n, const char *dev)
  54{
  55        struct rtattr *tail;
  56        __u32 tmp;
  57
  58        tail = addattr_nest(n, 1024, TCA_OPTIONS);
  59
  60        while (argc > 0) {
  61                if (strcmp(*argv, "quantum") == 0) {
  62                        NEXT_ARG();
  63                        if (get_size(&tmp, *argv)) {
  64                                fprintf(stderr, "Illegal \"quantum\"\n");
  65                                return -1;
  66                        }
  67                        addattr_l(n, 1024, TCA_DRR_QUANTUM, &tmp, sizeof(tmp));
  68                } else if (strcmp(*argv, "help") == 0) {
  69                        explain2();
  70                        return -1;
  71                } else {
  72                        fprintf(stderr, "What is \"%s\"?\n", *argv);
  73                        explain2();
  74                        return -1;
  75                }
  76                argc--; argv++;
  77        }
  78
  79        addattr_nest_end(n, tail);
  80        return 0;
  81}
  82
  83static int drr_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
  84{
  85        struct rtattr *tb[TCA_DRR_MAX + 1];
  86
  87        if (opt == NULL)
  88                return 0;
  89
  90        parse_rtattr_nested(tb, TCA_DRR_MAX, opt);
  91
  92        if (tb[TCA_DRR_QUANTUM])
  93                print_size(PRINT_FP, NULL, "quantum %s ",
  94                           rta_getattr_u32(tb[TCA_DRR_QUANTUM]));
  95        return 0;
  96}
  97
  98static int drr_print_xstats(struct qdisc_util *qu, FILE *f, struct rtattr *xstats)
  99{
 100        struct tc_drr_stats *x;
 101
 102        if (xstats == NULL)
 103                return 0;
 104        if (RTA_PAYLOAD(xstats) < sizeof(*x))
 105                return -1;
 106        x = RTA_DATA(xstats);
 107
 108        print_size(PRINT_FP, NULL, " deficit %s ", x->deficit);
 109        return 0;
 110}
 111
 112struct qdisc_util drr_qdisc_util = {
 113        .id             = "drr",
 114        .parse_qopt     = drr_parse_opt,
 115        .print_qopt     = drr_print_opt,
 116        .print_xstats   = drr_print_xstats,
 117        .parse_copt     = drr_parse_class_opt,
 118        .print_copt     = drr_print_opt,
 119};
 120