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/*
* f_fw.c FW filter.
*
* This program is free software; you can redistribute 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>
*
*/
#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 <linux/if.h> /* IFNAMSIZ */
#include "utils.h"
#include "tc_util.h"
static void explain(void)
{
fprintf(stderr, "Usage: ... fw [ classid CLASSID ] [ police POLICE_SPEC ]\n");
fprintf(stderr, " POLICE_SPEC := ... look at TBF\n");
fprintf(stderr, " CLASSID := X:Y\n");
}
#define usage() return(-1)
static int fw_parse_opt(struct filter_util *qu, char *handle, int argc, char **argv, struct nlmsghdr *n)
{
struct tc_police tp;
struct tcmsg *t = NLMSG_DATA(n);
struct rtattr *tail;
memset(&tp, 0, sizeof(tp));
if (handle) {
if (get_u32(&t->tcm_handle, handle, 0)) {
fprintf(stderr, "Illegal \"handle\"\n");
return -1;
}
}
if (argc == 0)
return 0;
tail = (struct rtattr*)(((void*)n)+NLMSG_ALIGN(n->nlmsg_len));
addattr_l(n, 4096, TCA_OPTIONS, NULL, 0);
while (argc > 0) {
if (matches(*argv, "classid") == 0 ||
matches(*argv, "flowid") == 0) {
unsigned handle;
NEXT_ARG();
if (get_tc_classid(&handle, *argv)) {
fprintf(stderr, "Illegal \"classid\"\n");
return -1;
}
addattr_l(n, 4096, TCA_FW_CLASSID, &handle, 4);
} else if (matches(*argv, "police") == 0) {
NEXT_ARG();
if (parse_police(&argc, &argv, TCA_FW_POLICE, n)) {
fprintf(stderr, "Illegal \"police\"\n");
return -1;
}
continue;
} else if (matches(*argv, "action") == 0) {
NEXT_ARG();
if (parse_action(&argc, &argv, TCA_FW_ACT, n)) {
fprintf(stderr, "Illegal fw \"action\"\n");
return -1;
}
continue;
} else if (strcmp(*argv, "indev") == 0) {
char d[IFNAMSIZ+1];
memset(d, 0, sizeof (d));
argc--;
argv++;
if (argc < 1) {
fprintf(stderr, "Illegal indev\n");
return -1;
}
strncpy(d, *argv, sizeof (d) - 1);
addattr_l(n, MAX_MSG, TCA_FW_INDEV, d, strlen(d) + 1);
} else if (strcmp(*argv, "help") == 0) {
explain();
return -1;
} else {
fprintf(stderr, "What is \"%s\"?\n", *argv);
explain();
return -1;
}
argc--; argv++;
}
tail->rta_len = (((void*)n)+n->nlmsg_len) - (void*)tail;
return 0;
}
static int fw_print_opt(struct filter_util *qu, FILE *f, struct rtattr *opt, __u32 handle)
{
struct rtattr *tb[TCA_FW_MAX+1];
if (opt == NULL)
return 0;
memset(tb, 0, sizeof(tb));
if (opt)
parse_rtattr(tb, TCA_FW_MAX, RTA_DATA(opt), RTA_PAYLOAD(opt));
if (handle)
fprintf(f, "handle 0x%x ", handle);
if (tb[TCA_FW_CLASSID]) {
SPRINT_BUF(b1);
fprintf(f, "classid %s ", sprint_tc_classid(*(__u32*)RTA_DATA(tb[TCA_FW_CLASSID]), b1));
}
if (tb[TCA_FW_POLICE])
tc_print_police(f, tb[TCA_FW_POLICE]);
if (tb[TCA_FW_INDEV]) {
struct rtattr *idev = tb[TCA_FW_INDEV];
fprintf(f, "input dev %s ",(char *)RTA_DATA(idev));
}
if (tb[TCA_FW_ACT]) {
fprintf(f, "\n");
tc_print_action(f, tb[TCA_FW_ACT]);
}
return 0;
}
struct filter_util fw_filter_util = {
.id = "fw",
.parse_fopt = fw_parse_opt,
.print_fopt = fw_print_opt,
};
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