tc/q_tbf.c - maze/iproute2 - Git at Google

 /*
  * q_tbf.c		TBF.
  *
  *		This program is free software; you can redistribute it and/or
  *		modify it under the terms of the GNU General Public License
  *		as published by the Free Software Foundation; either version
  *		2 of the License, or (at your option) any later version.
  *
  * Authors:	Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
  *
  */

 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
 #include <syslog.h>
 #include <fcntl.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
 #include <string.h>

 #include "utils.h"
 #include "tc_util.h"

 static void explain(void)
 {
 	fprintf(stderr, "Usage: ... tbf limit BYTES burst BYTES[/BYTES] rate KBPS [ mtu BYTES[/BYTES] ]\n");
 	fprintf(stderr, "               [ peakrate KBPS ] [ latency TIME ]\n");
 }

 static void explain1(char *arg)
 {
 	fprintf(stderr, "Illegal \"%s\"\n", arg);
 }


 #define usage() return(-1)

 static int tbf_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
 {
 	int ok=0;
 	struct tc_tbf_qopt opt;
 	__u32 rtab[256];
 	__u32 ptab[256];
 	unsigned buffer=0, mtu=0, mpu=0, latency=0;
 	int Rcell_log=-1, Pcell_log = -1;
 	struct rtattr *tail;

 	memset(&opt, 0, sizeof(opt));

 	while (argc > 0) {
 		if (matches(*argv, "limit") == 0) {
 			NEXT_ARG();
 			if (opt.limit || latency) {
 				fprintf(stderr, "Double \"limit/latency\" spec\n");
 				return -1;
 			}
 			if (get_size(&opt.limit, *argv)) {
 				explain1("limit");
 				return -1;
 			}
 			ok++;
 		} else if (matches(*argv, "latency") == 0) {
 			NEXT_ARG();
 			if (opt.limit || latency) {
 				fprintf(stderr, "Double \"limit/latency\" spec\n");
 				return -1;
 			}
 			if (get_time(&latency, *argv)) {
 				explain1("latency");
 				return -1;
 			}
 			ok++;
 		} else if (matches(*argv, "burst") == 0 ||
 			strcmp(*argv, "buffer") == 0 ||
 			strcmp(*argv, "maxburst") == 0) {
 			NEXT_ARG();
 			if (buffer) {
 				fprintf(stderr, "Double \"buffer/burst\" spec\n");
 				return -1;
 			}
 			if (get_size_and_cell(&buffer, &Rcell_log, *argv) < 0) {
 				explain1("buffer");
 				return -1;
 			}
 			ok++;
 		} else if (strcmp(*argv, "mtu") == 0 ||
 			   strcmp(*argv, "minburst") == 0) {
 			NEXT_ARG();
 			if (mtu) {
 				fprintf(stderr, "Double \"mtu/minburst\" spec\n");
 				return -1;
 			}
 			if (get_size_and_cell(&mtu, &Pcell_log, *argv) < 0) {
 				explain1("mtu");
 				return -1;
 			}
 			ok++;
 		} else if (strcmp(*argv, "mpu") == 0) {
 			NEXT_ARG();
 			if (mpu) {
 				fprintf(stderr, "Double \"mpu\" spec\n");
 				return -1;
 			}
 			if (get_size(&mpu, *argv)) {
 				explain1("mpu");
 				return -1;
 			}
 			ok++;
 		} else if (strcmp(*argv, "rate") == 0) {
 			NEXT_ARG();
 			if (opt.rate.rate) {
 				fprintf(stderr, "Double \"rate\" spec\n");
 				return -1;
 			}
 			if (get_rate(&opt.rate.rate, *argv)) {
 				explain1("rate");
 				return -1;
 			}
 			ok++;
 		} else if (matches(*argv, "peakrate") == 0) {
 			NEXT_ARG();
 			if (opt.peakrate.rate) {
 				fprintf(stderr, "Double \"peakrate\" spec\n");
 				return -1;
 			}
 			if (get_rate(&opt.peakrate.rate, *argv)) {
 				explain1("peakrate");
 				return -1;
 			}
 			ok++;
 		} else if (strcmp(*argv, "help") == 0) {
 			explain();
 			return -1;
 		} else {
 			fprintf(stderr, "What is \"%s\"?\n", *argv);
 			explain();
 			return -1;
 		}
 		argc--; argv++;
 	}

 	if (!ok)
 		return 0;

 	if (opt.rate.rate == 0 || !buffer) {
 		fprintf(stderr, "Both \"rate\" and \"burst\" are required.\n");
 		return -1;
 	}
 	if (opt.peakrate.rate) {
 		if (!mtu) {
 			fprintf(stderr, "\"mtu\" is required, if \"peakrate\" is requested.\n");
 			return -1;
 		}
 	}

 	if (opt.limit == 0 && latency == 0) {
 		fprintf(stderr, "Either \"limit\" or \"latency\" are required.\n");
 		return -1;
 	}

 	if (opt.limit == 0) {
 		double lim = opt.rate.rate*(double)latency/TIME_UNITS_PER_SEC + buffer;
 		if (opt.peakrate.rate) {
 			double lim2 = opt.peakrate.rate*(double)latency/TIME_UNITS_PER_SEC + mtu;
 			if (lim2 < lim)
 				lim = lim2;
 		}
 		opt.limit = lim;
 	}

 	if ((Rcell_log = tc_calc_rtable(opt.rate.rate, rtab, Rcell_log, mtu, mpu)) < 0) {
 		fprintf(stderr, "TBF: failed to calculate rate table.\n");
 		return -1;
 	}
 	opt.buffer = tc_calc_xmittime(opt.rate.rate, buffer);
 	opt.rate.cell_log = Rcell_log;
 	opt.rate.mpu = mpu;
 	if (opt.peakrate.rate) {
 		if ((Pcell_log = tc_calc_rtable(opt.peakrate.rate, ptab, Pcell_log, mtu, mpu)) < 0) {
 			fprintf(stderr, "TBF: failed to calculate peak rate table.\n");
 			return -1;
 		}
 		opt.mtu = tc_calc_xmittime(opt.peakrate.rate, mtu);
 		opt.peakrate.cell_log = Pcell_log;
 		opt.peakrate.mpu = mpu;
 	}

 	tail = NLMSG_TAIL(n);
 	addattr_l(n, 1024, TCA_OPTIONS, NULL, 0);
 	addattr_l(n, 2024, TCA_TBF_PARMS, &opt, sizeof(opt));
 	addattr_l(n, 3024, TCA_TBF_RTAB, rtab, 1024);
 	if (opt.peakrate.rate)
 		addattr_l(n, 4096, TCA_TBF_PTAB, ptab, 1024);
 	tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail;
 	return 0;
 }

 static int tbf_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
 {
 	struct rtattr *tb[TCA_TBF_PTAB+1];
 	struct tc_tbf_qopt *qopt;
 	double buffer, mtu;
 	double latency;
 	SPRINT_BUF(b1);
 	SPRINT_BUF(b2);

 	if (opt == NULL)
 		return 0;

 	parse_rtattr_nested(tb, TCA_TBF_PTAB, opt);

 	if (tb[TCA_TBF_PARMS] == NULL)
 		return -1;

 	qopt = RTA_DATA(tb[TCA_TBF_PARMS]);
 	if (RTA_PAYLOAD(tb[TCA_TBF_PARMS])  < sizeof(*qopt))
 		return -1;
 	fprintf(f, "rate %s ", sprint_rate(qopt->rate.rate, b1));
 	buffer = tc_calc_xmitsize(qopt->rate.rate, qopt->buffer);
 	if (show_details) {
 		fprintf(f, "burst %s/%u mpu %s ", sprint_size(buffer, b1),
 			1<<qopt->rate.cell_log, sprint_size(qopt->rate.mpu, b2));
 	} else {
 		fprintf(f, "burst %s ", sprint_size(buffer, b1));
 	}
 	if (show_raw)
 		fprintf(f, "[%08x] ", qopt->buffer);
 	if (qopt->peakrate.rate) {
 		fprintf(f, "peakrate %s ", sprint_rate(qopt->peakrate.rate, b1));
 		if (qopt->mtu || qopt->peakrate.mpu) {
 			mtu = tc_calc_xmitsize(qopt->peakrate.rate, qopt->mtu);
 			if (show_details) {
 				fprintf(f, "mtu %s/%u mpu %s ", sprint_size(mtu, b1),
 					1<<qopt->peakrate.cell_log, sprint_size(qopt->peakrate.mpu, b2));
 			} else {
 				fprintf(f, "minburst %s ", sprint_size(mtu, b1));
 			}
 			if (show_raw)
 				fprintf(f, "[%08x] ", qopt->mtu);
 		}
 	}

 	if (show_raw)
 		fprintf(f, "limit %s ", sprint_size(qopt->limit, b1));

 	latency = TIME_UNITS_PER_SEC*(qopt->limit/(double)qopt->rate.rate) - tc_core_tick2time(qopt->buffer);
 	if (qopt->peakrate.rate) {
 		double lat2 = TIME_UNITS_PER_SEC*(qopt->limit/(double)qopt->peakrate.rate) - tc_core_tick2time(qopt->mtu);
 		if (lat2 > latency)
 			latency = lat2;
 	}
 	fprintf(f, "lat %s ", sprint_time(latency, b1));

 	return 0;
 }

 struct qdisc_util tbf_qdisc_util = {
 	.id		= "tbf",
 	.parse_qopt	= tbf_parse_opt,
 	.print_qopt	= tbf_print_opt,
 };
	/*
	* q_tbf.c TBF.
	*
	* This program is free software; you can redistribute it and/or
	* modify it under the terms of the GNU General Public License
	* as published by the Free Software Foundation; either version
	* 2 of the License, or (at your option) any later version.
	*
	* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
	*
	*/

	#include <stdio.h>
	#include <stdlib.h>
	#include <unistd.h>
	#include <syslog.h>
	#include <fcntl.h>
	#include <sys/socket.h>
	#include <netinet/in.h>
	#include <arpa/inet.h>
	#include <string.h>

	#include "utils.h"
	#include "tc_util.h"

	static void explain(void)
	{
	fprintf(stderr, "Usage: ... tbf limit BYTES burst BYTES[/BYTES] rate KBPS [ mtu BYTES[/BYTES] ]\n");
	fprintf(stderr, " [ peakrate KBPS ] [ latency TIME ]\n");
	}

	static void explain1(char *arg)
	{
	fprintf(stderr, "Illegal \"%s\"\n", arg);
	}


	#define usage() return(-1)

	static int tbf_parse_opt(struct qdisc_util qu, int argc, char argv, struct nlmsghdr n)
	{
	int ok=0;
	struct tc_tbf_qopt opt;
	__u32 rtab[256];
	__u32 ptab[256];
	unsigned buffer=0, mtu=0, mpu=0, latency=0;
	int Rcell_log=-1, Pcell_log = -1;
	struct rtattr *tail;

	memset(&opt, 0, sizeof(opt));

	while (argc > 0) {
	if (matches(*argv, "limit") == 0) {
	NEXT_ARG();
	if (opt.limit \|\| latency) {
	fprintf(stderr, "Double \"limit/latency\" spec\n");
	return -1;
	}
	if (get_size(&opt.limit, *argv)) {
	explain1("limit");
	return -1;
	}
	ok++;
	} else if (matches(*argv, "latency") == 0) {
	NEXT_ARG();
	if (opt.limit \|\| latency) {
	fprintf(stderr, "Double \"limit/latency\" spec\n");
	return -1;
	}
	if (get_time(&latency, *argv)) {
	explain1("latency");
	return -1;
	}
	ok++;
	} else if (matches(*argv, "burst") == 0 \|\|
	strcmp(*argv, "buffer") == 0 \|\|
	strcmp(*argv, "maxburst") == 0) {
	NEXT_ARG();
	if (buffer) {
	fprintf(stderr, "Double \"buffer/burst\" spec\n");
	return -1;
	}
	if (get_size_and_cell(&buffer, &Rcell_log, *argv) < 0) {
	explain1("buffer");
	return -1;
	}
	ok++;
	} else if (strcmp(*argv, "mtu") == 0 \|\|
	strcmp(*argv, "minburst") == 0) {
	NEXT_ARG();
	if (mtu) {
	fprintf(stderr, "Double \"mtu/minburst\" spec\n");
	return -1;
	}
	if (get_size_and_cell(&mtu, &Pcell_log, *argv) < 0) {
	explain1("mtu");
	return -1;
	}
	ok++;
	} else if (strcmp(*argv, "mpu") == 0) {
	NEXT_ARG();
	if (mpu) {
	fprintf(stderr, "Double \"mpu\" spec\n");
	return -1;
	}
	if (get_size(&mpu, *argv)) {
	explain1("mpu");
	return -1;
	}
	ok++;
	} else if (strcmp(*argv, "rate") == 0) {
	NEXT_ARG();
	if (opt.rate.rate) {
	fprintf(stderr, "Double \"rate\" spec\n");
	return -1;
	}
	if (get_rate(&opt.rate.rate, *argv)) {
	explain1("rate");
	return -1;
	}
	ok++;
	} else if (matches(*argv, "peakrate") == 0) {
	NEXT_ARG();
	if (opt.peakrate.rate) {
	fprintf(stderr, "Double \"peakrate\" spec\n");
	return -1;
	}
	if (get_rate(&opt.peakrate.rate, *argv)) {
	explain1("peakrate");
	return -1;
	}
	ok++;
	} else if (strcmp(*argv, "help") == 0) {
	explain();
	return -1;
	} else {
	fprintf(stderr, "What is \"%s\"?\n", *argv);
	explain();
	return -1;
	}
	argc--; argv++;
	}

	if (!ok)
	return 0;

	if (opt.rate.rate == 0 \|\| !buffer) {
	fprintf(stderr, "Both \"rate\" and \"burst\" are required.\n");
	return -1;
	}
	if (opt.peakrate.rate) {
	if (!mtu) {
	fprintf(stderr, "\"mtu\" is required, if \"peakrate\" is requested.\n");
	return -1;
	}
	}

	if (opt.limit == 0 && latency == 0) {
	fprintf(stderr, "Either \"limit\" or \"latency\" are required.\n");
	return -1;
	}

	if (opt.limit == 0) {
	double lim = opt.rate.rate*(double)latency/TIME_UNITS_PER_SEC + buffer;
	if (opt.peakrate.rate) {
	double lim2 = opt.peakrate.rate*(double)latency/TIME_UNITS_PER_SEC + mtu;
	if (lim2 < lim)
	lim = lim2;
	}
	opt.limit = lim;
	}

	if ((Rcell_log = tc_calc_rtable(opt.rate.rate, rtab, Rcell_log, mtu, mpu)) < 0) {
	fprintf(stderr, "TBF: failed to calculate rate table.\n");
	return -1;
	}
	opt.buffer = tc_calc_xmittime(opt.rate.rate, buffer);
	opt.rate.cell_log = Rcell_log;
	opt.rate.mpu = mpu;
	if (opt.peakrate.rate) {
	if ((Pcell_log = tc_calc_rtable(opt.peakrate.rate, ptab, Pcell_log, mtu, mpu)) < 0) {
	fprintf(stderr, "TBF: failed to calculate peak rate table.\n");
	return -1;
	}
	opt.mtu = tc_calc_xmittime(opt.peakrate.rate, mtu);
	opt.peakrate.cell_log = Pcell_log;
	opt.peakrate.mpu = mpu;
	}

	tail = NLMSG_TAIL(n);
	addattr_l(n, 1024, TCA_OPTIONS, NULL, 0);
	addattr_l(n, 2024, TCA_TBF_PARMS, &opt, sizeof(opt));
	addattr_l(n, 3024, TCA_TBF_RTAB, rtab, 1024);
	if (opt.peakrate.rate)
	addattr_l(n, 4096, TCA_TBF_PTAB, ptab, 1024);
	tail->rta_len = (void ) NLMSG_TAIL(n) - (void ) tail;
	return 0;
	}

	static int tbf_print_opt(struct qdisc_util qu, FILE f, struct rtattr *opt)
	{
	struct rtattr *tb[TCA_TBF_PTAB+1];
	struct tc_tbf_qopt *qopt;
	double buffer, mtu;
	double latency;
	SPRINT_BUF(b1);
	SPRINT_BUF(b2);

	if (opt == NULL)
	return 0;

	parse_rtattr_nested(tb, TCA_TBF_PTAB, opt);

	if (tb[TCA_TBF_PARMS] == NULL)
	return -1;

	qopt = RTA_DATA(tb[TCA_TBF_PARMS]);
	if (RTA_PAYLOAD(tb[TCA_TBF_PARMS]) < sizeof(*qopt))
	return -1;
	fprintf(f, "rate %s ", sprint_rate(qopt->rate.rate, b1));
	buffer = tc_calc_xmitsize(qopt->rate.rate, qopt->buffer);
	if (show_details) {
	fprintf(f, "burst %s/%u mpu %s ", sprint_size(buffer, b1),
	1<<qopt->rate.cell_log, sprint_size(qopt->rate.mpu, b2));
	} else {
	fprintf(f, "burst %s ", sprint_size(buffer, b1));
	}
	if (show_raw)
	fprintf(f, "[%08x] ", qopt->buffer);
	if (qopt->peakrate.rate) {
	fprintf(f, "peakrate %s ", sprint_rate(qopt->peakrate.rate, b1));
	if (qopt->mtu \|\| qopt->peakrate.mpu) {
	mtu = tc_calc_xmitsize(qopt->peakrate.rate, qopt->mtu);
	if (show_details) {
	fprintf(f, "mtu %s/%u mpu %s ", sprint_size(mtu, b1),
	1<<qopt->peakrate.cell_log, sprint_size(qopt->peakrate.mpu, b2));
	} else {
	fprintf(f, "minburst %s ", sprint_size(mtu, b1));
	}
	if (show_raw)
	fprintf(f, "[%08x] ", qopt->mtu);
	}
	}

	if (show_raw)
	fprintf(f, "limit %s ", sprint_size(qopt->limit, b1));

	latency = TIME_UNITS_PER_SEC*(qopt->limit/(double)qopt->rate.rate) - tc_core_tick2time(qopt->buffer);
	if (qopt->peakrate.rate) {
	double lat2 = TIME_UNITS_PER_SEC*(qopt->limit/(double)qopt->peakrate.rate) - tc_core_tick2time(qopt->mtu);
	if (lat2 > latency)
	latency = lat2;
	}
	fprintf(f, "lat %s ", sprint_time(latency, b1));

	return 0;
	}

	struct qdisc_util tbf_qdisc_util = {
	.id = "tbf",
	.parse_qopt = tbf_parse_opt,
	.print_qopt = tbf_print_opt,
	};