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
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
|
/* Code to save the iptables state, in human readable-form. */
/* (C) 1999 by Paul 'Rusty' Russell <rusty@rustcorp.com.au> and
* (C) 2000-2002 by Harald Welte <laforge@gnumonks.org>
*
* This code is distributed under the terms of GNU GPL v2
*
*/
#include <getopt.h>
#include <sys/errno.h>
#include <stdio.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <netdb.h>
#include "libiptc/libiptc.h"
#include "iptables.h"
#include "iptables-multi.h"
#ifndef NO_SHARED_LIBS
#include <dlfcn.h>
#endif
static int show_binary = 0, show_counters = 0;
static const struct option options[] = {
{.name = "binary", .has_arg = false, .val = 'b'},
{.name = "counters", .has_arg = false, .val = 'c'},
{.name = "dump", .has_arg = false, .val = 'd'},
{.name = "table", .has_arg = true, .val = 't'},
{.name = "modprobe", .has_arg = true, .val = 'M'},
{NULL},
};
/* Debugging prototype. */
static int for_each_table(int (*func)(const char *tablename))
{
int ret = 1;
FILE *procfile = NULL;
char tablename[IPT_TABLE_MAXNAMELEN+1];
procfile = fopen("/proc/net/ip_tables_names", "r");
if (!procfile)
return ret;
while (fgets(tablename, sizeof(tablename), procfile)) {
if (tablename[strlen(tablename) - 1] != '\n')
xtables_error(OTHER_PROBLEM,
"Badly formed tablename `%s'\n",
tablename);
tablename[strlen(tablename) - 1] = '\0';
ret &= func(tablename);
}
fclose(procfile);
return ret;
}
static int do_output(const char *tablename)
{
struct iptc_handle *h;
const char *chain = NULL;
if (!tablename)
return for_each_table(&do_output);
h = iptc_init(tablename);
if (h == NULL) {
xtables_load_ko(xtables_modprobe_program, false);
h = iptc_init(tablename);
}
if (!h)
xtables_error(OTHER_PROBLEM, "Cannot initialize: %s\n",
iptc_strerror(errno));
if (!show_binary) {
time_t now = time(NULL);
printf("# Generated by iptables-save v%s on %s",
IPTABLES_VERSION, ctime(&now));
printf("*%s\n", tablename);
/* Dump out chain names first,
* thereby preventing dependency conflicts */
for (chain = iptc_first_chain(h);
chain;
chain = iptc_next_chain(h)) {
printf(":%s ", chain);
if (iptc_builtin(chain, h)) {
struct ipt_counters count;
printf("%s ",
iptc_get_policy(chain, &count, h));
printf("[%llu:%llu]\n", (unsigned long long)count.pcnt, (unsigned long long)count.bcnt);
} else {
printf("- [0:0]\n");
}
}
for (chain = iptc_first_chain(h);
chain;
chain = iptc_next_chain(h)) {
const struct ipt_entry *e;
/* Dump out rules */
e = iptc_first_rule(chain, h);
while(e) {
print_rule(e, h, chain, show_counters);
e = iptc_next_rule(e, h);
}
}
now = time(NULL);
printf("COMMIT\n");
printf("# Completed on %s", ctime(&now));
} else {
/* Binary, huh? OK. */
xtables_error(OTHER_PROBLEM, "Binary NYI\n");
}
iptc_free(h);
return 1;
}
/* Format:
* :Chain name POLICY packets bytes
* rule
*/
#ifdef IPTABLES_MULTI
int
iptables_save_main(int argc, char *argv[])
#else
int
main(int argc, char *argv[])
#endif
{
const char *tablename = NULL;
int c;
iptables_globals.program_name = "iptables-save";
c = xtables_init_all(&iptables_globals, NFPROTO_IPV4);
if (c < 0) {
fprintf(stderr, "%s/%s Failed to initialize xtables\n",
iptables_globals.program_name,
iptables_globals.program_version);
exit(1);
}
#if defined(ALL_INCLUSIVE) || defined(NO_SHARED_LIBS)
init_extensions();
#endif
while ((c = getopt_long(argc, argv, "bcdt:", options, NULL)) != -1) {
switch (c) {
case 'b':
show_binary = 1;
break;
case 'c':
show_counters = 1;
break;
case 't':
/* Select specific table. */
tablename = optarg;
break;
case 'M':
xtables_modprobe_program = optarg;
break;
case 'd':
do_output(tablename);
exit(0);
}
}
if (optind < argc) {
fprintf(stderr, "Unknown arguments found on commandline\n");
exit(1);
}
return !do_output(tablename);
}
|
