tc/q_qfq.c

   1 /*
   2  * q_qfq.c      QFQ.
   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:     Stephen Hemminger <shemminger@vyatta.com>
  10  *              Fabio Checconi <fabio@gandalf.sssup.it>
  11  *
  12  */
  13 #include <syslog.h>
  14 #include <fcntl.h>
  15 #include <sys/socket.h>
  16 #include <netinet/in.h>
  17 #include <arpa/inet.h>
  18 #include <string.h>
  19
  20 #include "utils.h"
  21 #include "tc_util.h"
  22
  23 static void explain(void)
  24 {
  25         fprintf(stderr, "Usage: ... qfq\n");
  26 }
  27
  28 static void explain1(const char *arg)
  29 {
  30         fprintf(stderr, "Illegal \"%s\"\n", arg);
  31 }
  32
  33 static void explain_class(void)
  34 {
  35         fprintf(stderr, "Usage: ... qfq weight NUMBER maxpkt BYTES\n");
  36 }
  37
  38 static int qfq_parse_opt(struct qdisc_util *qu, int argc, char **argv,
  39                          struct nlmsghdr *n)
  40 {
  41         while (argc > 0) {
  42                 if (matches(*argv, "help") == 0) {
  43                         explain();
  44                         return -1;
  45                 } else {
  46                         fprintf(stderr, "What is \"%s\"?\n", *argv);
  47                         explain();
  48                         return -1;
  49                 }
  50                 argc--; argv++;
  51         }
  52
  53         return 0;
  54 }
  55
  56 static int qfq_parse_class_opt(struct qdisc_util *qu, int argc, char **argv,
  57                                struct nlmsghdr *n)
  58 {
  59         struct rtattr *tail;
  60         __u32 tmp;
  61
  62         tail = NLMSG_TAIL(n);
  63         addattr_l(n, 4096, TCA_OPTIONS, NULL, 0);
  64
  65         while (argc > 0) {
  66                 if (matches(*argv, "weight") == 0) {
  67                         NEXT_ARG();
  68                         if (get_u32(&tmp, *argv, 10)) {
  69                                 explain1("weight"); return -1;
  70                         }
  71                         addattr32(n, 4096, TCA_QFQ_WEIGHT, tmp);
  72                 } else if (matches(*argv, "maxpkt") == 0) {
  73                         NEXT_ARG();
  74                         if (get_u32(&tmp, *argv, 10)) {
  75                                 explain1("maxpkt"); return -1;
  76                         }
  77                         addattr32(n, 4096, TCA_QFQ_LMAX, tmp);
  78                 } else if (strcmp(*argv, "help") == 0) {
  79                         explain_class();
  80                         return -1;
  81                 } else {
  82                         fprintf(stderr, "What is \"%s\"?\n", *argv);
  83                         explain_class();
  84                         return -1;
  85                 }
  86                 argc--; argv++;
  87         }
  88
  89         tail->rta_len = (void *)NLMSG_TAIL(n) - (void *)tail;
  90
  91         return 0;
  92 }
  93
  94 static int qfq_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
  95 {
  96         struct rtattr *tb[TCA_QFQ_MAX + 1];
  97
  98         if (opt == NULL)
  99                 return 0;
 100
 101         parse_rtattr_nested(tb, TCA_QFQ_MAX, opt);
 102
 103         if (tb[TCA_QFQ_WEIGHT]) {
 104                 fprintf(f, "weight %u ",
 105                         rta_getattr_u32(tb[TCA_QFQ_WEIGHT]));
 106         }
 107
 108         if (tb[TCA_QFQ_LMAX]) {
 109                 fprintf(f, "maxpkt %u ",
 110                         rta_getattr_u32(tb[TCA_QFQ_LMAX]));
 111         }
 112
 113         return 0;
 114 }
 115
 116 struct qdisc_util qfq_qdisc_util = {
 117         .id             = "qfq",
 118         .parse_qopt     = qfq_parse_opt,
 119         .print_qopt     = qfq_print_opt,
 120         .parse_copt     = qfq_parse_class_opt,
 121         .print_copt     = qfq_print_opt,
 122 };