1 /* ebt_mark_m
2 *
3 * Authors:
4 * Bart De Schuymer <bdschuym@pandora.be>
5 *
6 * July, 2002
7 *
8 * Adapted by Arturo Borrero Gonzalez <arturo@debian.org>
9 * to use libxtables for ebtables-compat in 2015.
10 */
11
12 #include <stdio.h>
13 #include <stdlib.h>
14 #include <string.h>
15 #include <xtables.h>
16 #include <linux/netfilter_bridge/ebt_mark_m.h>
17
18 enum {
19 O_MARK = 0,
20 };
21
22 static const struct xt_option_entry brmark_m_opts[] = {
23 { .name = "mark", .id = O_MARK, .type = XTTYPE_STRING,
24 .flags = XTOPT_INVERT | XTOPT_MAND },
25 XTOPT_TABLEEND,
26 };
27
brmark_m_print_help(void)28 static void brmark_m_print_help(void)
29 {
30 printf(
31 "mark option:\n"
32 "[!] --mark [value][/mask]: Match nfmask value (see man page)\n");
33 }
34
brmark_m_parse(struct xt_option_call * cb)35 static void brmark_m_parse(struct xt_option_call *cb)
36 {
37 struct ebt_mark_m_info *info = cb->data;
38 char *end;
39
40 xtables_option_parse(cb);
41
42 switch (cb->entry->id) {
43 case O_MARK:
44 info->invert = cb->invert;
45 info->mark = strtoul(cb->arg, &end, 0);
46 info->bitmask = EBT_MARK_AND;
47 if (*end == '/') {
48 if (end == cb->arg)
49 info->bitmask = EBT_MARK_OR;
50 info->mask = strtoul(end+1, &end, 0);
51 } else {
52 info->mask = UINT32_MAX;
53 }
54 if (*end != '\0' || end == cb->arg)
55 xtables_error(PARAMETER_PROBLEM, "Bad mark value '%s'",
56 cb->arg);
57 break;
58 }
59 }
60
brmark_m_print(const void * ip,const struct xt_entry_match * match,int numeric)61 static void brmark_m_print(const void *ip, const struct xt_entry_match *match,
62 int numeric)
63 {
64 struct ebt_mark_m_info *info = (struct ebt_mark_m_info *)match->data;
65
66 if (info->invert)
67 printf("! ");
68 printf("--mark ");
69 if (info->bitmask == EBT_MARK_OR)
70 printf("/0x%lx ", info->mask);
71 else if (info->mask != 0xffffffff)
72 printf("0x%lx/0x%lx ", info->mark, info->mask);
73 else
74 printf("0x%lx ", info->mark);
75 }
76
brmark_m_xlate(struct xt_xlate * xl,const struct xt_xlate_mt_params * params)77 static int brmark_m_xlate(struct xt_xlate *xl,
78 const struct xt_xlate_mt_params *params)
79 {
80 const struct ebt_mark_m_info *info = (const void*)params->match->data;
81 enum xt_op op = XT_OP_EQ;
82
83 if (info->invert)
84 op = XT_OP_NEQ;
85
86 xt_xlate_add(xl, "meta mark ");
87
88 if (info->bitmask == EBT_MARK_OR) {
89 xt_xlate_add(xl, "and 0x%x %s0 ", (uint32_t)info->mask,
90 info->invert ? "" : "!= ");
91 } else if (info->mask != UINT32_MAX) {
92 xt_xlate_add(xl, "and 0x%x %s0x%x ", (uint32_t)info->mask,
93 op == XT_OP_EQ ? "" : "!= ", (uint32_t)info->mark);
94 } else {
95 xt_xlate_add(xl, "%s0x%x ",
96 op == XT_OP_EQ ? "" : "!= ", (uint32_t)info->mark);
97 }
98
99 return 1;
100 }
101 static struct xtables_match brmark_m_match = {
102 .name = "mark_m",
103 .revision = 0,
104 .version = XTABLES_VERSION,
105 .family = NFPROTO_BRIDGE,
106 .size = XT_ALIGN(sizeof(struct ebt_mark_m_info)),
107 .userspacesize = XT_ALIGN(sizeof(struct ebt_mark_m_info)),
108 .help = brmark_m_print_help,
109 .x6_parse = brmark_m_parse,
110 .print = brmark_m_print,
111 .xlate = brmark_m_xlate,
112 .x6_options = brmark_m_opts,
113 };
114
_init(void)115 void _init(void)
116 {
117 xtables_register_match(&brmark_m_match);
118 }
119