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