+/*
+ * m_police.c Parse/print policing module options.
+ *
+ * This program is free software; you can u32istribute 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>
+ * FIXES: 19990619 - J Hadi Salim (hadi@cyberus.ca)
+ * simple addattr packaging fix.
+ * 2002: J Hadi Salim - Add tc action extensions syntax
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.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"
+
+struct action_util police_action_util = {
+ .id = "police",
+ .parse_aopt = act_parse_police,
+ .print_aopt = print_police,
+};
+
+static void usage(void)
+{
+ fprintf(stderr, "Usage: ... police rate BPS burst BYTES[/BYTES] [ mtu BYTES[/BYTES] ]\n");
+ fprintf(stderr, " [ peakrate BPS ] [ avrate BPS ] [ overhead BYTES ]\n");
+ fprintf(stderr, " [ linklayer TYPE ] [ CONTROL ]\n");
+
+ fprintf(stderr, "Where: CONTROL := conform-exceed <EXCEEDACT>[/NOTEXCEEDACT]\n");
+ fprintf(stderr, " Define how to handle packets which exceed (<EXCEEDACT>)\n");
+ fprintf(stderr, " or conform (<NOTEXCEEDACT>) the configured bandwidth limit.\n");
+ fprintf(stderr, " EXCEEDACT/NOTEXCEEDACT := { pipe | ok | reclassify | drop | continue |\n");
+ fprintf(stderr, " goto chain <CHAIN_INDEX> }\n");
+ exit(-1);
+}
+
+static void explain1(char *arg)
+{
+ fprintf(stderr, "Illegal \"%s\"\n", arg);
+}
+
+int act_parse_police(struct action_util *a, int *argc_p, char ***argv_p,
+ int tca_id, struct nlmsghdr *n)
+{
+ int argc = *argc_p;
+ char **argv = *argv_p;
+ int res = -1;
+ int ok = 0;
+ struct tc_police p = { .action = TC_POLICE_RECLASSIFY };
+ __u32 rtab[256];
+ __u32 ptab[256];
+ __u32 avrate = 0;
+ int presult = 0;
+ unsigned buffer = 0, mtu = 0, mpu = 0;
+ unsigned short overhead = 0;
+ unsigned int linklayer = LINKLAYER_ETHERNET; /* Assume ethernet */
+ int Rcell_log = -1, Pcell_log = -1;
+ struct rtattr *tail;
+
+ if (a) /* new way of doing things */
+ NEXT_ARG();
+
+ if (argc <= 0)
+ return -1;
+
+ while (argc > 0) {
+
+ if (matches(*argv, "index") == 0) {
+ NEXT_ARG();
+ if (get_u32(&p.index, *argv, 10)) {
+ fprintf(stderr, "Illegal \"index\"\n");
+ return -1;
+ }
+ } 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;
+ }
+ } 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;
+ }
+ } 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;
+ }
+ } else if (strcmp(*argv, "rate") == 0) {
+ NEXT_ARG();
+ if (p.rate.rate) {
+ fprintf(stderr, "Double \"rate\" spec\n");
+ return -1;
+ }
+ if (get_rate(&p.rate.rate, *argv)) {
+ explain1("rate");
+ return -1;
+ }
+ } else if (strcmp(*argv, "avrate") == 0) {
+ NEXT_ARG();
+ if (avrate) {
+ fprintf(stderr, "Double \"avrate\" spec\n");
+ return -1;
+ }
+ if (get_rate(&avrate, *argv)) {
+ explain1("avrate");
+ return -1;
+ }
+ } else if (matches(*argv, "peakrate") == 0) {
+ NEXT_ARG();
+ if (p.peakrate.rate) {
+ fprintf(stderr, "Double \"peakrate\" spec\n");
+ return -1;
+ }
+ if (get_rate(&p.peakrate.rate, *argv)) {
+ explain1("peakrate");
+ return -1;
+ }
+ } else if (matches(*argv, "reclassify") == 0 ||
+ matches(*argv, "drop") == 0 ||
+ matches(*argv, "shot") == 0 ||
+ matches(*argv, "continue") == 0 ||
+ matches(*argv, "pass") == 0 ||
+ matches(*argv, "ok") == 0 ||
+ matches(*argv, "pipe") == 0 ||
+ matches(*argv, "goto") == 0) {
+ if (!parse_action_control(&argc, &argv, &p.action, false))
+ goto action_ctrl_ok;
+ return -1;
+ } else if (strcmp(*argv, "conform-exceed") == 0) {
+ NEXT_ARG();
+ if (!parse_action_control_slash(&argc, &argv, &p.action,
+ &presult, true))
+ goto action_ctrl_ok;
+ return -1;
+ } else if (matches(*argv, "overhead") == 0) {
+ NEXT_ARG();
+ if (get_u16(&overhead, *argv, 10)) {
+ explain1("overhead"); return -1;
+ }
+ } else if (matches(*argv, "linklayer") == 0) {
+ NEXT_ARG();
+ if (get_linklayer(&linklayer, *argv)) {
+ explain1("linklayer"); return -1;
+ }
+ } else if (strcmp(*argv, "help") == 0) {
+ usage();
+ } else {
+ break;
+ }
+ NEXT_ARG_FWD();
+action_ctrl_ok:
+ ok++;
+ }
+
+ if (!ok)
+ return -1;
+
+ if (p.rate.rate && avrate)
+ return -1;
+
+ /* Must at least do late binding, use TB or ewma policing */
+ if (!p.rate.rate && !avrate && !p.index) {
+ fprintf(stderr, "\"rate\" or \"avrate\" MUST be specified.\n");
+ return -1;
+ }
+
+ /* When the TB policer is used, burst is required */
+ if (p.rate.rate && !buffer && !avrate) {
+ fprintf(stderr, "\"burst\" requires \"rate\".\n");
+ return -1;
+ }
+
+ if (p.peakrate.rate) {
+ if (!p.rate.rate) {
+ fprintf(stderr, "\"peakrate\" requires \"rate\".\n");
+ return -1;
+ }
+ if (!mtu) {
+ fprintf(stderr, "\"mtu\" is required, if \"peakrate\" is requested.\n");
+ return -1;
+ }
+ }
+
+ if (p.rate.rate) {
+ p.rate.mpu = mpu;
+ p.rate.overhead = overhead;
+ if (tc_calc_rtable(&p.rate, rtab, Rcell_log, mtu,
+ linklayer) < 0) {
+ fprintf(stderr, "POLICE: failed to calculate rate table.\n");
+ return -1;
+ }
+ p.burst = tc_calc_xmittime(p.rate.rate, buffer);
+ }
+ p.mtu = mtu;
+ if (p.peakrate.rate) {
+ p.peakrate.mpu = mpu;
+ p.peakrate.overhead = overhead;
+ if (tc_calc_rtable(&p.peakrate, ptab, Pcell_log, mtu,
+ linklayer) < 0) {
+ fprintf(stderr, "POLICE: failed to calculate peak rate table.\n");
+ return -1;
+ }
+ }
+
+ tail = addattr_nest(n, MAX_MSG, tca_id);
+ addattr_l(n, MAX_MSG, TCA_POLICE_TBF, &p, sizeof(p));
+ if (p.rate.rate)
+ addattr_l(n, MAX_MSG, TCA_POLICE_RATE, rtab, 1024);
+ if (p.peakrate.rate)
+ addattr_l(n, MAX_MSG, TCA_POLICE_PEAKRATE, ptab, 1024);
+ if (avrate)
+ addattr32(n, MAX_MSG, TCA_POLICE_AVRATE, avrate);
+ if (presult)
+ addattr32(n, MAX_MSG, TCA_POLICE_RESULT, presult);
+
+ addattr_nest_end(n, tail);
+ res = 0;
+
+ *argc_p = argc;
+ *argv_p = argv;
+ return res;
+}
+
+int parse_police(int *argc_p, char ***argv_p, int tca_id, struct nlmsghdr *n)
+{
+ return act_parse_police(NULL, argc_p, argv_p, tca_id, n);
+}
+
+int print_police(struct action_util *a, FILE *f, struct rtattr *arg)
+{
+ SPRINT_BUF(b1);
+ SPRINT_BUF(b2);
+ struct tc_police *p;
+ struct rtattr *tb[TCA_POLICE_MAX+1];
+ unsigned int buffer;
+ unsigned int linklayer;
+
+ if (arg == NULL)
+ return 0;
+
+ parse_rtattr_nested(tb, TCA_POLICE_MAX, arg);
+
+ if (tb[TCA_POLICE_TBF] == NULL) {
+ fprintf(f, "[NULL police tbf]");
+ return 0;
+ }
+#ifndef STOOPID_8BYTE
+ if (RTA_PAYLOAD(tb[TCA_POLICE_TBF]) < sizeof(*p)) {
+ fprintf(f, "[truncated police tbf]");
+ return -1;
+ }
+#endif
+ p = RTA_DATA(tb[TCA_POLICE_TBF]);
+
+ fprintf(f, " police 0x%x ", p->index);
+ fprintf(f, "rate %s ", sprint_rate(p->rate.rate, b1));
+ buffer = tc_calc_xmitsize(p->rate.rate, p->burst);
+ fprintf(f, "burst %s ", sprint_size(buffer, b1));
+ fprintf(f, "mtu %s ", sprint_size(p->mtu, b1));
+ if (show_raw)
+ fprintf(f, "[%08x] ", p->burst);
+
+ if (p->peakrate.rate)
+ fprintf(f, "peakrate %s ", sprint_rate(p->peakrate.rate, b1));
+
+ if (tb[TCA_POLICE_AVRATE])
+ fprintf(f, "avrate %s ",
+ sprint_rate(rta_getattr_u32(tb[TCA_POLICE_AVRATE]),
+ b1));
+
+ print_action_control(f, "action ", p->action, "");
+
+ if (tb[TCA_POLICE_RESULT]) {
+ __u32 action = rta_getattr_u32(tb[TCA_POLICE_RESULT]);
+
+ print_action_control(f, "/", action, " ");
+ } else
+ fprintf(f, " ");
+
+ fprintf(f, "overhead %ub ", p->rate.overhead);
+ linklayer = (p->rate.linklayer & TC_LINKLAYER_MASK);
+ if (linklayer > TC_LINKLAYER_ETHERNET || show_details)
+ fprintf(f, "linklayer %s ", sprint_linklayer(linklayer, b2));
+ fprintf(f, "\n\tref %d bind %d", p->refcnt, p->bindcnt);
+ if (show_stats) {
+ if (tb[TCA_POLICE_TM]) {
+ struct tcf_t *tm = RTA_DATA(tb[TCA_POLICE_TM]);
+
+ print_tm(f, tm);
+ }
+ }
+ fprintf(f, "\n");
+
+
+ return 0;
+}
+
+int tc_print_police(FILE *f, struct rtattr *arg)
+{
+ return print_police(&police_action_util, f, arg);
+}
projects / mirror_iproute2.git / blobdiff