p71924506
/
aosp12
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
aosp12/external/iproute2/tc/m_police.c

330 lines
8.4 KiB
C
Raw Blame History

/*
* 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 <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"
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, "pipe") == 0 ||
matches(*argv, "goto") == 0) {
if (parse_action_control(&argc, &argv, &p.action, false))
return -1;
} else if (strcmp(*argv, "conform-exceed") == 0) {
NEXT_ARG();
if (parse_action_control_slash(&argc, &argv, &p.action,
&presult, true))
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;
}
ok++;
argc--; argv++;
}
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 = NLMSG_TAIL(n);
addattr_l(n, MAX_MSG, tca_id, NULL, 0);
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);
tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) 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);
}
Reference in New Issue View Git Blame Copy Permalink