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https://git.kernel.org/pub/scm/network/iproute2/iproute2.git
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361 lines
8.6 KiB
C
361 lines
8.6 KiB
C
/*
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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 explain(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 ]\n");
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fprintf(stderr, " [ ACTIONTERM ]\n");
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fprintf(stderr, "Old Syntax ACTIONTERM := action <EXCEEDACT>[/NOTEXCEEDACT] \n");
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fprintf(stderr, "New Syntax ACTIONTERM := conform-exceed <EXCEEDACT>[/NOTEXCEEDACT] \n");
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fprintf(stderr, "Where: *EXCEEDACT := pipe | ok | reclassify | drop | continue \n");
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fprintf(stderr, "Where: pipe is only valid for new syntax \n");
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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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#define usage() return(-1)
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char *police_action_n2a(int action, char *buf, int len)
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{
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switch (action) {
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case -1:
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return "continue";
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break;
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case TC_POLICE_OK:
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return "pass";
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break;
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case TC_POLICE_SHOT:
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return "drop";
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break;
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case TC_POLICE_RECLASSIFY:
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return "reclassify";
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case TC_POLICE_PIPE:
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return "pipe";
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default:
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snprintf(buf, len, "%d", action);
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return buf;
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}
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}
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int police_action_a2n(char *arg, int *result)
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{
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int res;
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if (matches(arg, "continue") == 0)
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res = -1;
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else if (matches(arg, "drop") == 0)
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res = TC_POLICE_SHOT;
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else if (matches(arg, "shot") == 0)
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res = TC_POLICE_SHOT;
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else if (matches(arg, "pass") == 0)
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res = TC_POLICE_OK;
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else if (strcmp(arg, "ok") == 0)
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res = TC_POLICE_OK;
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else if (matches(arg, "reclassify") == 0)
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res = TC_POLICE_RECLASSIFY;
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else if (matches(arg, "pipe") == 0)
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res = TC_POLICE_PIPE;
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else {
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char dummy;
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if (sscanf(arg, "%d%c", &res, &dummy) != 1)
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return -1;
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}
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*result = res;
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return 0;
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}
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int get_police_result(int *action, int *result, char *arg)
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{
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char *p = strchr(arg, '/');
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if (p)
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*p = 0;
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if (police_action_a2n(arg, action)) {
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if (p)
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*p = '/';
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return -1;
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}
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if (p) {
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*p = '/';
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if (police_action_a2n(p+1, result))
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return -1;
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}
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return 0;
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}
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int act_parse_police(struct action_util *a,int *argc_p, char ***argv_p, 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;
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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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int Rcell_log=-1, Pcell_log = -1;
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struct rtattr *tail;
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memset(&p, 0, sizeof(p));
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p.action = TC_POLICE_RECLASSIFY;
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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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p.action = TC_POLICE_RECLASSIFY;
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} else if (matches(*argv, "drop") == 0 ||
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matches(*argv, "shot") == 0) {
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p.action = TC_POLICE_SHOT;
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} else if (matches(*argv, "continue") == 0) {
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p.action = TC_POLICE_UNSPEC;
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} else if (matches(*argv, "pass") == 0) {
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p.action = TC_POLICE_OK;
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} else if (matches(*argv, "pipe") == 0) {
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p.action = TC_POLICE_PIPE;
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} else if (strcmp(*argv, "conform-exceed") == 0) {
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NEXT_ARG();
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if (get_police_result(&p.action, &presult, *argv)) {
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fprintf(stderr, "Illegal \"action\"\n");
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return -1;
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}
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} else if (strcmp(*argv, "help") == 0) {
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explain();
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return -1;
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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 && !buffer) {
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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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if ((Rcell_log = tc_calc_rtable(p.rate.rate, rtab, Rcell_log, mtu, mpu)) < 0) {
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fprintf(stderr, "TBF: 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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p.rate.cell_log = Rcell_log;
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p.rate.mpu = mpu;
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}
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p.mtu = mtu;
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if (p.peakrate.rate) {
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if ((Pcell_log = tc_calc_rtable(p.peakrate.rate, ptab, Pcell_log, mtu, mpu)) < 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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p.peakrate.cell_log = Pcell_log;
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p.peakrate.mpu = mpu;
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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
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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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struct tc_police *p;
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struct rtattr *tb[TCA_POLICE_MAX+1];
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unsigned buffer;
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if (arg == NULL)
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return 0;
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memset(tb, 0, sizeof(tb));
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parse_rtattr(tb, TCA_POLICE_MAX, RTA_DATA(arg), RTA_PAYLOAD(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 = ((double)p->rate.rate*tc_core_tick2usec(p->burst))/1000000;
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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 ", sprint_rate(*(__u32*)RTA_DATA(tb[TCA_POLICE_AVRATE]), b1));
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fprintf(f, "action %s", police_action_n2a(p->action, b1, sizeof(b1)));
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if (tb[TCA_POLICE_RESULT]) {
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fprintf(f, "/%s ", police_action_n2a(*(int*)RTA_DATA(tb[TCA_POLICE_RESULT]), b1, sizeof(b1)));
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} else
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fprintf(f, " ");
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fprintf(f, "\nref %d bind %d\n",p->refcnt, p->bindcnt);
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return 0;
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}
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int
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tc_print_police(FILE *f, struct rtattr *arg) {
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return print_police(&police_action_util,f,arg);
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}
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