blob: b1847c899f35e2950c95ed7087328f1a2b9b7455 [file] [log] [blame]
/*
* f_tcindex.c Traffic control index filter
*
* Written 1998,1999 by Werner Almesberger
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <syslog.h>
#include <fcntl.h>
#include <string.h>
#include <netinet/in.h>
#include "utils.h"
#include "tc_util.h"
static void explain(void)
{
fprintf(stderr," Usage: ... tcindex [ hash SIZE ] [ mask MASK ]"
" [ shift SHIFT ]\n");
fprintf(stderr," [ pass_on | fall_through ]\n");
fprintf(stderr," [ classid CLASSID ] "
"[ action ACTION_SPEC ]\n");
}
static int tcindex_parse_opt(struct filter_util *qu, char *handle, int argc,
char **argv, struct nlmsghdr *n)
{
struct tcmsg *t = NLMSG_DATA(n);
struct rtattr *tail;
char *end;
if (handle) {
t->tcm_handle = strtoul(handle,&end,0);
if (*end) {
fprintf(stderr, "Illegal filter ID\n");
return -1;
}
}
if (!argc) return 0;
tail = NLMSG_TAIL(n);
addattr_l(n,4096,TCA_OPTIONS,NULL,0);
while (argc) {
if (!strcmp(*argv,"hash")) {
int hash;
NEXT_ARG();
hash = strtoul(*argv,&end,0);
if (*end || !hash || hash > 0x10000) {
explain();
return -1;
}
addattr_l(n,4096,TCA_TCINDEX_HASH,&hash,sizeof(hash));
}
else if (!strcmp(*argv,"mask")) {
__u16 mask;
NEXT_ARG();
mask = strtoul(*argv,&end,0);
if (*end) {
explain();
return -1;
}
addattr_l(n,4096,TCA_TCINDEX_MASK,&mask,sizeof(mask));
}
else if (!strcmp(*argv,"shift")) {
int shift;
NEXT_ARG();
shift = strtoul(*argv,&end,0);
if (*end) {
explain();
return -1;
}
addattr_l(n,4096,TCA_TCINDEX_SHIFT,&shift,
sizeof(shift));
}
else if (!strcmp(*argv,"fall_through")) {
int value = 1;
addattr_l(n,4096,TCA_TCINDEX_FALL_THROUGH,&value,
sizeof(value));
}
else if (!strcmp(*argv,"pass_on")) {
int value = 0;
addattr_l(n,4096,TCA_TCINDEX_FALL_THROUGH,&value,
sizeof(value));
}
else if (!strcmp(*argv,"classid")) {
__u32 handle;
NEXT_ARG();
if (get_tc_classid(&handle,*argv)) {
fprintf(stderr, "Illegal \"classid\"\n");
return -1;
}
addattr_l(n, 4096, TCA_TCINDEX_CLASSID, &handle, 4);
}
else if (!strcmp(*argv,"police")) {
NEXT_ARG();
if (parse_police(&argc, &argv, TCA_TCINDEX_POLICE, n)) {
fprintf(stderr, "Illegal \"police\"\n");
return -1;
}
continue;
}
else if (!strcmp(*argv,"action")) {
NEXT_ARG();
if (parse_police(&argc, &argv, TCA_TCINDEX_ACT, n)) {
fprintf(stderr, "Illegal \"action\"\n");
return -1;
}
continue;
}
else {
explain();
return -1;
}
argc--;
argv++;
}
tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail;
return 0;
}
static int tcindex_print_opt(struct filter_util *qu, FILE *f,
struct rtattr *opt, __u32 handle)
{
struct rtattr *tb[TCA_TCINDEX_MAX+1];
if (opt == NULL)
return 0;
parse_rtattr_nested(tb, TCA_TCINDEX_MAX, opt);
if (handle != ~0) fprintf(f,"handle 0x%04x ",handle);
if (tb[TCA_TCINDEX_HASH]) {
__u16 hash;
if (RTA_PAYLOAD(tb[TCA_TCINDEX_HASH]) < sizeof(hash))
return -1;
hash = rta_getattr_u16(tb[TCA_TCINDEX_HASH]);
fprintf(f,"hash %d ",hash);
}
if (tb[TCA_TCINDEX_MASK]) {
__u16 mask;
if (RTA_PAYLOAD(tb[TCA_TCINDEX_MASK]) < sizeof(mask))
return -1;
mask = rta_getattr_u16(tb[TCA_TCINDEX_MASK]);
fprintf(f,"mask 0x%04x ",mask);
}
if (tb[TCA_TCINDEX_SHIFT]) {
int shift;
if (RTA_PAYLOAD(tb[TCA_TCINDEX_SHIFT]) < sizeof(shift))
return -1;
shift = *(int *) RTA_DATA(tb[TCA_TCINDEX_SHIFT]);
fprintf(f,"shift %d ",shift);
}
if (tb[TCA_TCINDEX_FALL_THROUGH]) {
int fall_through;
if (RTA_PAYLOAD(tb[TCA_TCINDEX_FALL_THROUGH]) <
sizeof(fall_through))
return -1;
fall_through = *(int *) RTA_DATA(tb[TCA_TCINDEX_FALL_THROUGH]);
fprintf(f,fall_through ? "fall_through " : "pass_on ");
}
if (tb[TCA_TCINDEX_CLASSID]) {
SPRINT_BUF(b1);
fprintf(f, "classid %s ",sprint_tc_classid(*(__u32 *)
RTA_DATA(tb[TCA_TCINDEX_CLASSID]), b1));
}
if (tb[TCA_TCINDEX_POLICE]) {
fprintf(f, "\n");
tc_print_police(f, tb[TCA_TCINDEX_POLICE]);
}
if (tb[TCA_TCINDEX_ACT]) {
fprintf(f, "\n");
tc_print_police(f, tb[TCA_TCINDEX_ACT]);
}
return 0;
}
struct filter_util tcindex_filter_util = {
.id = "tcindex",
.parse_fopt = tcindex_parse_opt,
.print_fopt = tcindex_print_opt,
};