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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 	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 };
    123