1 /* Shared library add-on to iptables to add CONNMARK target support.
3 * (C) 2002,2004 MARA Systems AB <http://www.marasystems.com>
4 * by Henrik Nordstrom <hno@marasystems.com>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
28 #include <linux/netfilter_ipv4/ip_tables.h>
29 #include <../include/linux/netfilter_ipv4/ipt_CONNMARK.h>
33 struct ipt_entry_target t
;
34 struct ipt_connmark_target_info mark
;
38 /* Function which prints out usage message. */
43 "CONNMARK target v%s options:\n"
44 " --set-mark value[/mask] Set conntrack mark value\n"
45 " --set-return [--mask mask] Set conntrack mark & nfmark, RETURN\n"
46 " --save-mark [--mask mask] Save the packet nfmark in the connection\n"
47 " --restore-mark [--mask mask] Restore saved nfmark value\n"
52 static struct option opts
[] = {
53 { "set-mark", 1, 0, '1' },
54 { "save-mark", 0, 0, '2' },
55 { "restore-mark", 0, 0, '3' },
56 { "mask", 1, 0, '4' },
57 { "set-return", 1, 0, '9' },
61 /* Initialize the target. */
63 init(struct ipt_entry_target
*t
, unsigned int *nfcache
)
65 struct ipt_connmark_target_info
*markinfo
66 = (struct ipt_connmark_target_info
*)t
->data
;
68 markinfo
->mask
= 0xffffffffUL
;
71 /* Function which parses command options; returns true if it
74 parse(int c
, char **argv
, int invert
, unsigned int *flags
,
75 const struct ipt_entry
*entry
,
76 struct ipt_entry_target
**target
)
78 struct ipt_connmark_target_info
*markinfo
79 = (struct ipt_connmark_target_info
*)(*target
)->data
;
85 markinfo
->mode
= (c
== '1') ? IPT_CONNMARK_SET
: IPT_CONNMARK_SET_RETURN
;
86 // markinfo->mode = IPT_CONNMARK_SET;
88 markinfo
->mark
= strtoul(optarg
, &end
, 0);
89 if (*end
== '/' && end
[1] != '\0')
90 markinfo
->mask
= strtoul(end
+1, &end
, 0);
92 if (*end
!= '\0' || end
== optarg
)
93 exit_error(PARAMETER_PROBLEM
, "Bad MARK value `%s'", optarg
);
95 exit_error(PARAMETER_PROBLEM
,
96 "CONNMARK target: Can't specify --set-mark twice");
100 markinfo
->mode
= IPT_CONNMARK_SAVE
;
102 exit_error(PARAMETER_PROBLEM
,
103 "CONNMARK target: Can't specify --save-mark twice");
107 markinfo
->mode
= IPT_CONNMARK_RESTORE
;
109 exit_error(PARAMETER_PROBLEM
,
110 "CONNMARK target: Can't specify --restore-mark twice");
115 exit_error(PARAMETER_PROBLEM
,
116 "CONNMARK target: Can't specify --mask without a operation");
117 markinfo
->mask
= strtoul(optarg
, &end
, 0);
119 if (*end
!= '\0' || end
== optarg
)
120 exit_error(PARAMETER_PROBLEM
, "Bad MASK value `%s'", optarg
);
130 final_check(unsigned int flags
)
133 exit_error(PARAMETER_PROBLEM
,
134 "CONNMARK target: No operation specified");
138 print_mark(unsigned long mark
)
140 printf("0x%lx", mark
);
144 print_mask(const char *text
, unsigned long mask
)
146 if (mask
!= 0xffffffffUL
)
147 printf("%s0x%lx", text
, mask
);
151 /* Prints out the target info. */
153 print(const struct ipt_ip
*ip
,
154 const struct ipt_entry_target
*target
,
157 const struct ipt_connmark_target_info
*markinfo
=
158 (const struct ipt_connmark_target_info
*)target
->data
;
159 switch (markinfo
->mode
) {
160 case IPT_CONNMARK_SET
:
161 case IPT_CONNMARK_SET_RETURN
:
162 printf("CONNMARK set%s ", (markinfo
->mode
== IPT_CONNMARK_SET_RETURN
) ? "-return" : "");
164 // printf("CONNMARK set ");
165 print_mark(markinfo
->mark
);
166 print_mask("/", markinfo
->mask
);
169 case IPT_CONNMARK_SAVE
:
170 printf("CONNMARK save ");
171 print_mask("mask ", markinfo
->mask
);
174 case IPT_CONNMARK_RESTORE
:
175 printf("CONNMARK restore ");
176 print_mask("mask ", markinfo
->mask
);
179 printf("ERROR: UNKNOWN CONNMARK MODE ");
184 /* Saves the target into in parsable form to stdout. */
186 save(const struct ipt_ip
*ip
, const struct ipt_entry_target
*target
)
188 const struct ipt_connmark_target_info
*markinfo
=
189 (const struct ipt_connmark_target_info
*)target
->data
;
191 switch (markinfo
->mode
) {
192 case IPT_CONNMARK_SET
:
193 case IPT_CONNMARK_SET_RETURN
:
194 printf("--set-%s ", (markinfo
->mode
== IPT_CONNMARK_SET_RETURN
) ? "return" : "mark");
196 // printf("--set-mark ");
197 print_mark(markinfo
->mark
);
198 print_mask("/", markinfo
->mask
);
201 case IPT_CONNMARK_SAVE
:
202 printf("--save-mark ");
203 print_mask("--mask ", markinfo
->mask
);
205 case IPT_CONNMARK_RESTORE
:
206 printf("--restore-mark ");
207 print_mask("--mask ", markinfo
->mask
);
210 printf("ERROR: UNKNOWN CONNMARK MODE ");
215 static struct iptables_target connmark_target
= {
217 .version
= IPTABLES_VERSION
,
218 .size
= IPT_ALIGN(sizeof(struct ipt_connmark_target_info
)),
219 .userspacesize
= IPT_ALIGN(sizeof(struct ipt_connmark_target_info
)),
223 .final_check
= &final_check
,
231 register_target(&connmark_target
);