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