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6b7dff17f6
2004/09/04 06:16:51-07:00 net[shemminger]!kaber : prevent tc crashes (Logical change 1.81)
143 lines
3.3 KiB
C
143 lines
3.3 KiB
C
/*
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* f_fw.c FW 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 <syslog.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 <linux/if.h> /* IFNAMSIZ */
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#include "utils.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, "Usage: ... fw [ classid CLASSID ] [ police POLICE_SPEC ]\n");
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fprintf(stderr, " POLICE_SPEC := ... look at TBF\n");
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fprintf(stderr, " CLASSID := X:Y\n");
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}
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#define usage() return(-1)
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static int fw_parse_opt(struct filter_util *qu, char *handle, int argc, char **argv, struct nlmsghdr *n)
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{
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struct tc_police tp;
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struct tcmsg *t = NLMSG_DATA(n);
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struct rtattr *tail;
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memset(&tp, 0, sizeof(tp));
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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 = (struct rtattr*)(((void*)n)+NLMSG_ALIGN(n->nlmsg_len));
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addattr_l(n, 4096, TCA_OPTIONS, NULL, 0);
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while (argc > 0) {
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if (matches(*argv, "classid") == 0 ||
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matches(*argv, "flowid") == 0) {
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unsigned 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_FW_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_FW_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_FW_ACT, n)) {
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fprintf(stderr, "Illegal fw \"action\"\n");
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return -1;
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}
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continue;
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} else if (strcmp(*argv, "indev") == 0) {
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char d[IFNAMSIZ+1];
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memset(d, 0, sizeof (d));
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argc--;
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argv++;
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if (argc < 1) {
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fprintf(stderr, "Illegal indev\n");
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return -1;
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}
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strncpy(d, *argv, sizeof (d) - 1);
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addattr_l(n, MAX_MSG, TCA_FW_INDEV, d, strlen(d) + 1);
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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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tail->rta_len = (((void*)n)+n->nlmsg_len) - (void*)tail;
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return 0;
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}
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static int fw_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_FW_MAX+1];
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if (opt == NULL)
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return 0;
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memset(tb, 0, sizeof(tb));
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if (opt)
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parse_rtattr(tb, TCA_FW_MAX, RTA_DATA(opt), RTA_PAYLOAD(opt));
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if (handle)
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fprintf(f, "handle 0x%x ", handle);
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if (tb[TCA_FW_CLASSID]) {
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SPRINT_BUF(b1);
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fprintf(f, "classid %s ", sprint_tc_classid(*(__u32*)RTA_DATA(tb[TCA_FW_CLASSID]), b1));
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}
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if (tb[TCA_FW_POLICE])
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tc_print_police(f, tb[TCA_FW_POLICE]);
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if (tb[TCA_FW_INDEV]) {
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struct rtattr *idev = tb[TCA_FW_INDEV];
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fprintf(f, "input dev %s ",(char *)RTA_DATA(idev));
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}
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if (tb[TCA_FW_ACT]) {
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fprintf(f, "\n");
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tc_print_action(f, tb[TCA_FW_ACT]);
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}
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return 0;
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}
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struct filter_util fw_filter_util = {
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.id = "fw",
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.parse_fopt = fw_parse_opt,
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.print_fopt = fw_print_opt,
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};
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