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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* f_route.c ROUTE filter.
*
* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
*/
#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 "rt_names.h"
#include "tc_common.h"
#include "tc_util.h"
static void explain(void)
{
fprintf(stderr,
"Usage: ... route [ from REALM | fromif TAG ] [ to REALM ]\n"
" [ classid CLASSID ] [ action ACTION_SPEC ]\n"
" ACTION_SPEC := ... look at individual actions\n"
" CLASSID := X:Y\n"
"\n"
"NOTE: CLASSID is parsed as hexadecimal input.\n");
}
static int route_parse_opt(struct filter_util *qu, char *handle, int argc, char **argv, struct nlmsghdr *n)
{
struct tcmsg *t = NLMSG_DATA(n);
struct rtattr *tail;
__u32 fh = 0xFFFF8000;
__u32 order = 0;
if (handle) {
if (get_u32(&t->tcm_handle, handle, 0)) {
fprintf(stderr, "Illegal \"handle\"\n");
return -1;
}
}
if (argc == 0)
return 0;
tail = addattr_nest(n, 4096, TCA_OPTIONS);
while (argc > 0) {
if (matches(*argv, "to") == 0) {
__u32 id;
NEXT_ARG();
if (rtnl_rtrealm_a2n(&id, *argv)) {
fprintf(stderr, "Illegal \"to\"\n");
return -1;
}
addattr_l(n, 4096, TCA_ROUTE4_TO, &id, 4);
fh &= ~0x80FF;
fh |= id&0xFF;
} else if (matches(*argv, "from") == 0) {
__u32 id;
NEXT_ARG();
if (rtnl_rtrealm_a2n(&id, *argv)) {
fprintf(stderr, "Illegal \"from\"\n");
return -1;
}
addattr_l(n, 4096, TCA_ROUTE4_FROM, &id, 4);
fh &= 0xFFFF;
fh |= id<<16;
} else if (matches(*argv, "fromif") == 0) {
__u32 id;
NEXT_ARG();
ll_init_map(&rth);
if ((id = ll_name_to_index(*argv)) <= 0) {
fprintf(stderr, "Illegal \"fromif\"\n");
return -1;
}
addattr_l(n, 4096, TCA_ROUTE4_IIF, &id, 4);
fh &= 0xFFFF;
fh |= (0x8000|id)<<16;
} else if (matches(*argv, "classid") == 0 ||
strcmp(*argv, "flowid") == 0) {
unsigned int classid;
NEXT_ARG();
if (get_tc_classid(&classid, *argv)) {
fprintf(stderr, "Illegal \"classid\"\n");
return -1;
}
addattr_l(n, 4096, TCA_ROUTE4_CLASSID, &classid, 4);
} else if (matches(*argv, "police") == 0) {
NEXT_ARG();
if (parse_police(&argc, &argv, TCA_ROUTE4_POLICE, n)) {
fprintf(stderr, "Illegal \"police\"\n");
return -1;
}
continue;
} else if (matches(*argv, "action") == 0) {
NEXT_ARG();
if (parse_action(&argc, &argv, TCA_ROUTE4_ACT, n)) {
fprintf(stderr, "Illegal \"action\"\n");
return -1;
}
continue;
} else if (matches(*argv, "order") == 0) {
NEXT_ARG();
if (get_u32(&order, *argv, 0)) {
fprintf(stderr, "Illegal \"order\"\n");
return -1;
}
} else if (strcmp(*argv, "help") == 0) {
explain();
return -1;
} else {
fprintf(stderr, "What is \"%s\"?\n", *argv);
explain();
return -1;
}
argc--; argv++;
}
addattr_nest_end(n, tail);
if (order) {
fh &= ~0x7F00;
fh |= (order<<8)&0x7F00;
}
if (!t->tcm_handle)
t->tcm_handle = fh;
return 0;
}
static int route_print_opt(struct filter_util *qu, FILE *f, struct rtattr *opt, __u32 handle)
{
struct rtattr *tb[TCA_ROUTE4_MAX+1];
SPRINT_BUF(b1);
if (opt == NULL)
return 0;
parse_rtattr_nested(tb, TCA_ROUTE4_MAX, opt);
if (handle)
fprintf(f, "fh 0x%08x ", handle);
if (handle&0x7F00)
fprintf(f, "order %d ", (handle>>8)&0x7F);
if (tb[TCA_ROUTE4_CLASSID]) {
SPRINT_BUF(b1);
fprintf(f, "flowid %s ", sprint_tc_classid(rta_getattr_u32(tb[TCA_ROUTE4_CLASSID]), b1));
}
if (tb[TCA_ROUTE4_TO])
fprintf(f, "to %s ", rtnl_rtrealm_n2a(rta_getattr_u32(tb[TCA_ROUTE4_TO]), b1, sizeof(b1)));
if (tb[TCA_ROUTE4_FROM])
fprintf(f, "from %s ", rtnl_rtrealm_n2a(rta_getattr_u32(tb[TCA_ROUTE4_FROM]), b1, sizeof(b1)));
if (tb[TCA_ROUTE4_IIF])
fprintf(f, "fromif %s", ll_index_to_name(rta_getattr_u32(tb[TCA_ROUTE4_IIF])));
if (tb[TCA_ROUTE4_POLICE])
tc_print_police(f, tb[TCA_ROUTE4_POLICE]);
if (tb[TCA_ROUTE4_ACT])
tc_print_action(f, tb[TCA_ROUTE4_ACT], 0);
return 0;
}
struct filter_util route_filter_util = {
.id = "route",
.parse_fopt = route_parse_opt,
.print_fopt = route_print_opt,
};
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