1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
|
/*
* libxt_LED.c - shared library add-on to iptables to add customized LED
* trigger support.
*
* (C) 2008 Adam Nielsen <a.nielsen@shikadi.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <xtables.h>
#include <linux/netfilter/xt_LED.h>
enum {
O_LED_TRIGGER_ID = 0,
O_LED_DELAY,
O_LED_ALWAYS_BLINK,
};
#define s struct xt_led_info
static const struct xt_option_entry LED_opts[] = {
{.name = "led-trigger-id", .id = O_LED_TRIGGER_ID,
.flags = XTOPT_MAND, .type = XTTYPE_STRING, .min = 0,
.max = sizeof(((struct xt_led_info *)NULL)->id) -
sizeof("netfilter-")},
{.name = "led-delay", .id = O_LED_DELAY, .type = XTTYPE_STRING},
{.name = "led-always-blink", .id = O_LED_ALWAYS_BLINK,
.type = XTTYPE_NONE},
XTOPT_TABLEEND,
};
#undef s
static void LED_help(void)
{
printf(
"LED target options:\n"
"--led-trigger-id name suffix for led trigger name\n"
"--led-delay ms leave the LED on for this number of\n"
" milliseconds after triggering.\n"
"--led-always-blink blink on arriving packets, even if\n"
" the LED is already on.\n"
);
}
static void LED_parse(struct xt_option_call *cb)
{
struct xt_led_info *led = cb->data;
xtables_option_parse(cb);
switch (cb->entry->id) {
case O_LED_TRIGGER_ID:
snprintf(led->id, sizeof(led->id), "netfilter-%s", cb->arg);
break;
case O_LED_DELAY:
if (strncasecmp(cb->arg, "inf", 3) == 0)
led->delay = -1;
else if (!xtables_strtoui(cb->arg, NULL, &led->delay, 0, UINT32_MAX))
xtables_error(PARAMETER_PROBLEM,
"Delay value must be within range 0..%u",
UINT32_MAX);
break;
case O_LED_ALWAYS_BLINK:
led->always_blink = 1;
break;
}
}
static void LED_print(const void *ip, const struct xt_entry_target *target,
int numeric)
{
const struct xt_led_info *led = (void *)target->data;
const char *id = led->id + strlen("netfilter-"); /* trim off prefix */
printf(" led-trigger-id:\"");
/* Escape double quotes and backslashes in the ID */
while (*id != '\0') {
if (*id == '"' || *id == '\\')
printf("\\");
printf("%c", *id++);
}
printf("\"");
if (led->delay == -1)
printf(" led-delay:inf");
else
printf(" led-delay:%dms", led->delay);
if (led->always_blink)
printf(" led-always-blink");
}
static void LED_save(const void *ip, const struct xt_entry_target *target)
{
const struct xt_led_info *led = (void *)target->data;
const char *id = led->id + strlen("netfilter-"); /* trim off prefix */
printf(" --led-trigger-id \"");
/* Escape double quotes and backslashes in the ID */
while (*id != '\0') {
if (*id == '"' || *id == '\\')
printf("\\");
printf("%c", *id++);
}
printf("\"");
/* Only print the delay if it's not zero (the default) */
if (led->delay > 0)
printf(" --led-delay %d", led->delay);
else if (led->delay == -1)
printf(" --led-delay inf");
/* Only print always_blink if it's not set to the default */
if (led->always_blink)
printf(" --led-always-blink");
}
static struct xtables_target led_tg_reg = {
.version = XTABLES_VERSION,
.name = "LED",
.family = PF_UNSPEC,
.revision = 0,
.size = XT_ALIGN(sizeof(struct xt_led_info)),
.userspacesize = offsetof(struct xt_led_info, internal_data),
.help = LED_help,
.print = LED_print,
.save = LED_save,
.x6_parse = LED_parse,
.x6_options = LED_opts,
};
void _init(void)
{
xtables_register_target(&led_tg_reg);
}
|
