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148 lines
3.5 KiB
C
148 lines
3.5 KiB
C
/*
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* f_basic.c Basic Classifier
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*
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* This program is free software; you can distribute 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: Thomas Graf <tgraf@suug.ch>
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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 <linux/if.h>
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#include "utils.h"
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#include "tc_util.h"
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#include "m_ematch.h"
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static void explain(void)
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{
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fprintf(stderr, "Usage: ... basic [ match EMATCH_TREE ]\n");
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fprintf(stderr, " [ action ACTION_SPEC ] [ classid CLASSID ]\n");
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fprintf(stderr, "\n");
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fprintf(stderr, "Where: SELECTOR := SAMPLE SAMPLE ...\n");
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fprintf(stderr, " FILTERID := X:Y:Z\n");
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fprintf(stderr, " ACTION_SPEC := ... look at individual actions\n");
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fprintf(stderr, "\nNOTE: CLASSID is parsed as hexadecimal input.\n");
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}
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static int basic_parse_opt(struct filter_util *qu, char *handle,
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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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long h = 0;
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if (handle) {
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h = strtol(handle, NULL, 0);
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if (h == LONG_MIN || h == LONG_MAX) {
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fprintf(stderr, "Illegal handle \"%s\", must be numeric.\n",
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handle);
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return -1;
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}
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}
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t->tcm_handle = h;
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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, MAX_MSG, TCA_OPTIONS, NULL, 0);
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while (argc > 0) {
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if (matches(*argv, "match") == 0) {
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NEXT_ARG();
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if (parse_ematch(&argc, &argv, TCA_BASIC_EMATCHES, n)) {
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fprintf(stderr, "Illegal \"ematch\"\n");
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return -1;
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}
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continue;
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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, MAX_MSG, TCA_BASIC_CLASSID, &handle, 4);
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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_BASIC_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, "police") == 0) {
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NEXT_ARG();
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if (parse_police(&argc, &argv, TCA_BASIC_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 (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 basic_print_opt(struct filter_util *qu, FILE *f,
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struct rtattr *opt, __u32 handle)
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{
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struct rtattr *tb[TCA_BASIC_MAX+1];
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if (opt == NULL)
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return 0;
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parse_rtattr_nested(tb, TCA_BASIC_MAX, opt);
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if (handle)
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fprintf(f, "handle 0x%x ", handle);
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if (tb[TCA_BASIC_CLASSID]) {
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SPRINT_BUF(b1);
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fprintf(f, "flowid %s ",
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sprint_tc_classid(rta_getattr_u32(tb[TCA_BASIC_CLASSID]), b1));
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}
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if (tb[TCA_BASIC_EMATCHES])
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print_ematch(f, tb[TCA_BASIC_EMATCHES]);
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if (tb[TCA_BASIC_POLICE]) {
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fprintf(f, "\n");
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tc_print_police(f, tb[TCA_BASIC_POLICE]);
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}
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if (tb[TCA_BASIC_ACT]) {
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tc_print_action(f, tb[TCA_BASIC_ACT], 0);
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}
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return 0;
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}
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struct filter_util basic_filter_util = {
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.id = "basic",
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.parse_fopt = basic_parse_opt,
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.print_fopt = basic_print_opt,
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};
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