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330 lines
8.4 KiB
330 lines
8.4 KiB
/*
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* m_police.c Parse/print policing module options.
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*
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* This program is free software; you can u32istribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
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* FIXES: 19990619 - J Hadi Salim (hadi@cyberus.ca)
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* simple addattr packaging fix.
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* 2002: J Hadi Salim - Add tc action extensions syntax
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <syslog.h>
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#include <fcntl.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <string.h>
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#include "utils.h"
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#include "tc_util.h"
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struct action_util police_action_util = {
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.id = "police",
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.parse_aopt = act_parse_police,
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.print_aopt = print_police,
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};
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static void usage(void)
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{
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fprintf(stderr, "Usage: ... police rate BPS burst BYTES[/BYTES] [ mtu BYTES[/BYTES] ]\n");
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fprintf(stderr, " [ peakrate BPS ] [ avrate BPS ] [ overhead BYTES ]\n");
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fprintf(stderr, " [ linklayer TYPE ] [ CONTROL ]\n");
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fprintf(stderr, "Where: CONTROL := conform-exceed <EXCEEDACT>[/NOTEXCEEDACT]\n");
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fprintf(stderr, " Define how to handle packets which exceed (<EXCEEDACT>)\n");
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fprintf(stderr, " or conform (<NOTEXCEEDACT>) the configured bandwidth limit.\n");
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fprintf(stderr, " EXCEEDACT/NOTEXCEEDACT := { pipe | ok | reclassify | drop | continue |\n");
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fprintf(stderr, " goto chain <CHAIN_INDEX> }\n");
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exit(-1);
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}
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static void explain1(char *arg)
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{
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fprintf(stderr, "Illegal \"%s\"\n", arg);
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}
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int act_parse_police(struct action_util *a, int *argc_p, char ***argv_p,
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int tca_id, struct nlmsghdr *n)
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{
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int argc = *argc_p;
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char **argv = *argv_p;
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int res = -1;
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int ok = 0;
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struct tc_police p = { .action = TC_POLICE_RECLASSIFY };
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__u32 rtab[256];
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__u32 ptab[256];
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__u32 avrate = 0;
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int presult = 0;
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unsigned buffer = 0, mtu = 0, mpu = 0;
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unsigned short overhead = 0;
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unsigned int linklayer = LINKLAYER_ETHERNET; /* Assume ethernet */
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int Rcell_log = -1, Pcell_log = -1;
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struct rtattr *tail;
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if (a) /* new way of doing things */
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NEXT_ARG();
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if (argc <= 0)
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return -1;
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while (argc > 0) {
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if (matches(*argv, "index") == 0) {
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NEXT_ARG();
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if (get_u32(&p.index, *argv, 10)) {
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fprintf(stderr, "Illegal \"index\"\n");
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return -1;
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}
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} else if (matches(*argv, "burst") == 0 ||
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strcmp(*argv, "buffer") == 0 ||
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strcmp(*argv, "maxburst") == 0) {
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NEXT_ARG();
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if (buffer) {
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fprintf(stderr, "Double \"buffer/burst\" spec\n");
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return -1;
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}
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if (get_size_and_cell(&buffer, &Rcell_log, *argv) < 0) {
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explain1("buffer");
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return -1;
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}
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} else if (strcmp(*argv, "mtu") == 0 ||
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strcmp(*argv, "minburst") == 0) {
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NEXT_ARG();
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if (mtu) {
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fprintf(stderr, "Double \"mtu/minburst\" spec\n");
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return -1;
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}
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if (get_size_and_cell(&mtu, &Pcell_log, *argv) < 0) {
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explain1("mtu");
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return -1;
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}
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} else if (strcmp(*argv, "mpu") == 0) {
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NEXT_ARG();
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if (mpu) {
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fprintf(stderr, "Double \"mpu\" spec\n");
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return -1;
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}
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if (get_size(&mpu, *argv)) {
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explain1("mpu");
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return -1;
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}
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} else if (strcmp(*argv, "rate") == 0) {
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NEXT_ARG();
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if (p.rate.rate) {
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fprintf(stderr, "Double \"rate\" spec\n");
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return -1;
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}
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if (get_rate(&p.rate.rate, *argv)) {
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explain1("rate");
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return -1;
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}
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} else if (strcmp(*argv, "avrate") == 0) {
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NEXT_ARG();
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if (avrate) {
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fprintf(stderr, "Double \"avrate\" spec\n");
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return -1;
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}
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if (get_rate(&avrate, *argv)) {
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explain1("avrate");
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return -1;
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}
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} else if (matches(*argv, "peakrate") == 0) {
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NEXT_ARG();
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if (p.peakrate.rate) {
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fprintf(stderr, "Double \"peakrate\" spec\n");
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return -1;
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}
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if (get_rate(&p.peakrate.rate, *argv)) {
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explain1("peakrate");
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return -1;
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}
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} else if (matches(*argv, "reclassify") == 0 ||
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matches(*argv, "drop") == 0 ||
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matches(*argv, "shot") == 0 ||
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matches(*argv, "continue") == 0 ||
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matches(*argv, "pass") == 0 ||
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matches(*argv, "pipe") == 0 ||
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matches(*argv, "goto") == 0) {
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if (parse_action_control(&argc, &argv, &p.action, false))
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return -1;
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} else if (strcmp(*argv, "conform-exceed") == 0) {
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NEXT_ARG();
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if (parse_action_control_slash(&argc, &argv, &p.action,
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&presult, true))
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return -1;
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} else if (matches(*argv, "overhead") == 0) {
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NEXT_ARG();
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if (get_u16(&overhead, *argv, 10)) {
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explain1("overhead"); return -1;
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}
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} else if (matches(*argv, "linklayer") == 0) {
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NEXT_ARG();
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if (get_linklayer(&linklayer, *argv)) {
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explain1("linklayer"); return -1;
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}
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} else if (strcmp(*argv, "help") == 0) {
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usage();
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} else {
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break;
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}
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ok++;
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argc--; argv++;
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}
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if (!ok)
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return -1;
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if (p.rate.rate && avrate)
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return -1;
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/* Must at least do late binding, use TB or ewma policing */
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if (!p.rate.rate && !avrate && !p.index) {
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fprintf(stderr, "\"rate\" or \"avrate\" MUST be specified.\n");
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return -1;
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}
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/* When the TB policer is used, burst is required */
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if (p.rate.rate && !buffer && !avrate) {
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fprintf(stderr, "\"burst\" requires \"rate\".\n");
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return -1;
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}
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if (p.peakrate.rate) {
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if (!p.rate.rate) {
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fprintf(stderr, "\"peakrate\" requires \"rate\".\n");
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return -1;
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}
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if (!mtu) {
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fprintf(stderr, "\"mtu\" is required, if \"peakrate\" is requested.\n");
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return -1;
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}
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}
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if (p.rate.rate) {
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p.rate.mpu = mpu;
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p.rate.overhead = overhead;
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if (tc_calc_rtable(&p.rate, rtab, Rcell_log, mtu,
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linklayer) < 0) {
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fprintf(stderr, "POLICE: failed to calculate rate table.\n");
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return -1;
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}
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p.burst = tc_calc_xmittime(p.rate.rate, buffer);
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}
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p.mtu = mtu;
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if (p.peakrate.rate) {
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p.peakrate.mpu = mpu;
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p.peakrate.overhead = overhead;
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if (tc_calc_rtable(&p.peakrate, ptab, Pcell_log, mtu,
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linklayer) < 0) {
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fprintf(stderr, "POLICE: failed to calculate peak rate table.\n");
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return -1;
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}
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}
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tail = NLMSG_TAIL(n);
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addattr_l(n, MAX_MSG, tca_id, NULL, 0);
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addattr_l(n, MAX_MSG, TCA_POLICE_TBF, &p, sizeof(p));
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if (p.rate.rate)
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addattr_l(n, MAX_MSG, TCA_POLICE_RATE, rtab, 1024);
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if (p.peakrate.rate)
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addattr_l(n, MAX_MSG, TCA_POLICE_PEAKRATE, ptab, 1024);
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if (avrate)
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addattr32(n, MAX_MSG, TCA_POLICE_AVRATE, avrate);
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if (presult)
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addattr32(n, MAX_MSG, TCA_POLICE_RESULT, presult);
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tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail;
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res = 0;
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*argc_p = argc;
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*argv_p = argv;
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return res;
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}
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int parse_police(int *argc_p, char ***argv_p, int tca_id, struct nlmsghdr *n)
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{
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return act_parse_police(NULL, argc_p, argv_p, tca_id, n);
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}
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int print_police(struct action_util *a, FILE *f, struct rtattr *arg)
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{
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SPRINT_BUF(b1);
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SPRINT_BUF(b2);
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struct tc_police *p;
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struct rtattr *tb[TCA_POLICE_MAX+1];
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unsigned int buffer;
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unsigned int linklayer;
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if (arg == NULL)
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return 0;
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parse_rtattr_nested(tb, TCA_POLICE_MAX, arg);
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if (tb[TCA_POLICE_TBF] == NULL) {
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fprintf(f, "[NULL police tbf]");
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return 0;
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}
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#ifndef STOOPID_8BYTE
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if (RTA_PAYLOAD(tb[TCA_POLICE_TBF]) < sizeof(*p)) {
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fprintf(f, "[truncated police tbf]");
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return -1;
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}
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#endif
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p = RTA_DATA(tb[TCA_POLICE_TBF]);
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fprintf(f, " police 0x%x ", p->index);
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fprintf(f, "rate %s ", sprint_rate(p->rate.rate, b1));
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buffer = tc_calc_xmitsize(p->rate.rate, p->burst);
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fprintf(f, "burst %s ", sprint_size(buffer, b1));
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fprintf(f, "mtu %s ", sprint_size(p->mtu, b1));
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if (show_raw)
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fprintf(f, "[%08x] ", p->burst);
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if (p->peakrate.rate)
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fprintf(f, "peakrate %s ", sprint_rate(p->peakrate.rate, b1));
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if (tb[TCA_POLICE_AVRATE])
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fprintf(f, "avrate %s ",
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sprint_rate(rta_getattr_u32(tb[TCA_POLICE_AVRATE]),
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b1));
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print_action_control(f, "action ", p->action, "");
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if (tb[TCA_POLICE_RESULT]) {
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__u32 action = rta_getattr_u32(tb[TCA_POLICE_RESULT]);
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print_action_control(f, "/", action, " ");
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} else
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fprintf(f, " ");
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fprintf(f, "overhead %ub ", p->rate.overhead);
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linklayer = (p->rate.linklayer & TC_LINKLAYER_MASK);
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if (linklayer > TC_LINKLAYER_ETHERNET || show_details)
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fprintf(f, "linklayer %s ", sprint_linklayer(linklayer, b2));
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fprintf(f, "\n\tref %d bind %d", p->refcnt, p->bindcnt);
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if (show_stats) {
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if (tb[TCA_POLICE_TM]) {
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struct tcf_t *tm = RTA_DATA(tb[TCA_POLICE_TM]);
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print_tm(f, tm);
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}
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}
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fprintf(f, "\n");
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return 0;
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}
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int tc_print_police(FILE *f, struct rtattr *arg)
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{
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return print_police(&police_action_util, f, arg);
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}
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