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
|
/*
* ebtables-restore.c, October 2005
*
* Author: Bart De Schuymer
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include "include/ebtables_u.h"
static struct ebt_u_replace replace[3];
void ebt_early_init_once();
#define OPT_KERNELDATA 0x800 /* Also defined in ebtables.c */
static void copy_table_names()
{
strcpy(replace[0].name, "filter");
strcpy(replace[1].name, "nat");
strcpy(replace[2].name, "broute");
}
#define ebtrest_print_error(format, args...) do {fprintf(stderr, "ebtables-restore: "\
"line %d: "format".\n", line, ##args); exit(-1);} while (0)
int main(int argc_, char *argv_[])
{
char *argv[EBTD_ARGC_MAX], cmdline[EBTD_CMDLINE_MAXLN];
int i, offset, quotemode = 0, argc, table_nr = -1, line = 0, whitespace;
char ebtables_str[] = "ebtables";
if (argc_ != 1)
ebtrest_print_error("options are not supported");
ebt_silent = 0;
copy_table_names();
ebt_early_init_once();
argv[0] = ebtables_str;
while (fgets(cmdline, EBTD_CMDLINE_MAXLN, stdin)) {
line++;
if (*cmdline == '#' || *cmdline == '\n')
continue;
*strchr(cmdline, '\n') = '\0';
if (*cmdline == '*') {
if (table_nr != -1) {
ebt_deliver_table(&replace[table_nr]);
ebt_deliver_counters(&replace[table_nr]);
}
for (i = 0; i < 3; i++)
if (!strcmp(replace[i].name, cmdline+1))
break;
if (i == 3)
ebtrest_print_error("table '%s' was not recognized", cmdline+1);
table_nr = i;
replace[table_nr].command = 11;
ebt_get_kernel_table(&replace[table_nr], 1);
replace[table_nr].command = 0;
replace[table_nr].flags = OPT_KERNELDATA; /* Prevent do_command from initialising replace */
continue;
} else if (table_nr == -1)
ebtrest_print_error("no table specified");
if (*cmdline == ':') {
int policy, chain_nr;
char *ch;
if (!(ch = strchr(cmdline, ' ')))
ebtrest_print_error("no policy specified");
*ch = '\0';
for (i = 0; i < NUM_STANDARD_TARGETS; i++)
if (!strcmp(ch+1, ebt_standard_targets[i])) {
policy = -i -1;
if (policy == EBT_CONTINUE)
i = NUM_STANDARD_TARGETS;
break;
}
if (i == NUM_STANDARD_TARGETS)
ebtrest_print_error("invalid policy specified");
/* No need to check chain name for consistency, since
* we're supposed to be reading an automatically generated
* file. */
if ((chain_nr = ebt_get_chainnr(&replace[table_nr], cmdline+1)) == -1)
ebt_new_chain(&replace[table_nr], cmdline+1, policy);
else
replace[table_nr].chains[chain_nr]->policy = policy;
continue;
}
argv[1] = cmdline;
offset = whitespace = 0;
argc = 2;
while (cmdline[offset] != '\0') {
if (cmdline[offset] == '\"') {
whitespace = 0;
quotemode ^= 1;
if (quotemode)
argv[argc++] = &cmdline[offset+1];
else if (cmdline[offset+1] != ' ' && cmdline[offset+1] != '\0')
ebtrest_print_error("syntax error at \"");
cmdline[offset] = '\0';
} else if (!quotemode && cmdline[offset] == ' ') {
whitespace = 1;
cmdline[offset] = '\0';
} else if (whitespace == 1) {
argv[argc++] = &cmdline[offset];
whitespace = 0;
}
offset++;
}
if (quotemode)
ebtrest_print_error("wrong use of '\"'");
optind = 0; /* Setting optind = 1 causes serious annoyances */
do_command(argc, argv, EXEC_STYLE_DAEMON, &replace[table_nr]);
ebt_reinit_extensions();
}
if (table_nr != -1) {
ebt_deliver_table(&replace[table_nr]);
ebt_deliver_counters(&replace[table_nr]);
}
return 0;
}
|
