libxt_CLASSIFY.c revision 0c3753b1d4226a6e7bea9619415cf40cadee1e58 
1/*
2 * Copyright (c) 2003-2013 Patrick McHardy <kaber@trash.net>
3 */
4
5#include <stdio.h>
6#include <xtables.h>
7#include <linux/netfilter/xt_CLASSIFY.h>
8#include <linux/pkt_sched.h>
9
10enum {
11	O_SET_CLASS = 0,
12};
13
14static void
15CLASSIFY_help(void)
16{
17	printf(
18"CLASSIFY target options:\n"
19"--set-class MAJOR:MINOR    Set skb->priority value (always hexadecimal!)\n");
20}
21
22static const struct xt_option_entry CLASSIFY_opts[] = {
23	{.name = "set-class", .id = O_SET_CLASS, .type = XTTYPE_STRING,
24	 .flags = XTOPT_MAND},
25	XTOPT_TABLEEND,
26};
27
28static int CLASSIFY_string_to_priority(const char *s, unsigned int *p)
29{
30	unsigned int i, j;
31
32	if (sscanf(s, "%x:%x", &i, &j) != 2)
33		return 1;
34
35	*p = TC_H_MAKE(i<<16, j);
36	return 0;
37}
38
39static void CLASSIFY_parse(struct xt_option_call *cb)
40{
41	struct xt_classify_target_info *clinfo = cb->data;
42
43	xtables_option_parse(cb);
44	if (CLASSIFY_string_to_priority(cb->arg, &clinfo->priority))
45		xtables_error(PARAMETER_PROBLEM,
46			   "Bad class value \"%s\"", cb->arg);
47}
48
49static void
50CLASSIFY_print_class(unsigned int priority, int numeric)
51{
52	printf(" %x:%x", TC_H_MAJ(priority)>>16, TC_H_MIN(priority));
53}
54
55static void
56CLASSIFY_print(const void *ip,
57      const struct xt_entry_target *target,
58      int numeric)
59{
60	const struct xt_classify_target_info *clinfo =
61		(const struct xt_classify_target_info *)target->data;
62	printf(" CLASSIFY set");
63	CLASSIFY_print_class(clinfo->priority, numeric);
64}
65
66static void
67CLASSIFY_save(const void *ip, const struct xt_entry_target *target)
68{
69	const struct xt_classify_target_info *clinfo =
70		(const struct xt_classify_target_info *)target->data;
71
72	printf(" --set-class %.4x:%.4x",
73	       TC_H_MAJ(clinfo->priority)>>16, TC_H_MIN(clinfo->priority));
74}
75
76static struct xtables_target classify_target = {
77	.family		= NFPROTO_UNSPEC,
78	.name		= "CLASSIFY",
79	.version	= XTABLES_VERSION,
80	.size		= XT_ALIGN(sizeof(struct xt_classify_target_info)),
81	.userspacesize	= XT_ALIGN(sizeof(struct xt_classify_target_info)),
82	.help		= CLASSIFY_help,
83	.print		= CLASSIFY_print,
84	.save		= CLASSIFY_save,
85	.x6_parse	= CLASSIFY_parse,
86	.x6_options	= CLASSIFY_opts,
87};
88
89void _init(void)
90{
91	xtables_register_target(&classify_target);
92}
93