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      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 (at) vyatta.com>
     10  *		Fabio Checconi <fabio (at) 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 	if (argc > 0) {
     42 		if (matches(*argv, "help") != 0)
     43 			fprintf(stderr, "What is \"%s\"?\n", *argv);
     44 		explain();
     45 		return -1;
     46 	}
     47 
     48 	return 0;
     49 }
     50 
     51 static int qfq_parse_class_opt(struct qdisc_util *qu, int argc, char **argv,
     52 			       struct nlmsghdr *n)
     53 {
     54 	struct rtattr *tail;
     55 	__u32 tmp;
     56 
     57 	tail = NLMSG_TAIL(n);
     58 	addattr_l(n, 4096, TCA_OPTIONS, NULL, 0);
     59 
     60 	while (argc > 0) {
     61 		if (matches(*argv, "weight") == 0) {
     62 			NEXT_ARG();
     63 			if (get_u32(&tmp, *argv, 10)) {
     64 				explain1("weight"); return -1;
     65 			}
     66 			addattr32(n, 4096, TCA_QFQ_WEIGHT, tmp);
     67 		} else if (matches(*argv, "maxpkt") == 0) {
     68 			NEXT_ARG();
     69 			if (get_u32(&tmp, *argv, 10)) {
     70 				explain1("maxpkt"); return -1;
     71 			}
     72 			addattr32(n, 4096, TCA_QFQ_LMAX, tmp);
     73 		} else if (strcmp(*argv, "help") == 0) {
     74 			explain_class();
     75 			return -1;
     76 		} else {
     77 			fprintf(stderr, "What is \"%s\"?\n", *argv);
     78 			explain_class();
     79 			return -1;
     80 		}
     81 		argc--; argv++;
     82 	}
     83 
     84 	tail->rta_len = (void *)NLMSG_TAIL(n) - (void *)tail;
     85 
     86 	return 0;
     87 }
     88 
     89 static int qfq_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
     90 {
     91 	struct rtattr *tb[TCA_QFQ_MAX + 1];
     92 
     93 	if (opt == NULL)
     94 		return 0;
     95 
     96 	parse_rtattr_nested(tb, TCA_QFQ_MAX, opt);
     97 
     98 	if (tb[TCA_QFQ_WEIGHT]) {
     99 		fprintf(f, "weight %u ",
    100 			rta_getattr_u32(tb[TCA_QFQ_WEIGHT]));
    101 	}
    102 
    103 	if (tb[TCA_QFQ_LMAX]) {
    104 		fprintf(f, "maxpkt %u ",
    105 			rta_getattr_u32(tb[TCA_QFQ_LMAX]));
    106 	}
    107 
    108 	return 0;
    109 }
    110 
    111 struct qdisc_util qfq_qdisc_util = {
    112 	.id		= "qfq",
    113 	.parse_qopt	= qfq_parse_opt,
    114 	.print_qopt	= qfq_print_opt,
    115 	.parse_copt	= qfq_parse_class_opt,
    116 	.print_copt	= qfq_print_opt,
    117 };
    118