2 * firewall3 - 3rd OpenWrt UCI firewall implementation
4 * Copyright (C) 2013 Jo-Philipp Wich <jow@openwrt.org>
6 * Permission to use, copy, modify, and/or distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
22 static struct option base_opts
[] = {
23 { .name
= "match", .has_arg
= 1, .val
= 'm' },
24 { .name
= "jump", .has_arg
= 1, .val
= 'j' },
25 { .name
= "append", .has_arg
= 1, .val
= 'A' },
29 static struct xtables_globals xtg
= {
31 .program_version
= "4",
32 .orig_opts
= base_opts
,
35 static struct xtables_globals xtg6
= {
37 .program_version
= "6",
38 .orig_opts
= base_opts
,
41 /* Required by certain extensions like SNAT and DNAT */
45 get_kernel_version(void)
47 static struct utsname uts
;
48 int x
= 0, y
= 0, z
= 0;
50 if (uname(&uts
) == -1)
51 sprintf(uts
.release
, "3.0.0");
53 sscanf(uts
.release
, "%d.%d.%d", &x
, &y
, &z
);
54 kernel_version
= LINUX_VERSION(x
, y
, z
);
58 #define __ipt_module(x) libxt_##x##_init, libipt_##x##_init, libip6t_##x##_init,
60 static void fw3_init_extensions(void)
63 void (*initfuncs
[])(void) = { FW3_IPT_MODULES
};
65 for (i
= 0; i
< sizeof(initfuncs
)/sizeof(initfuncs
[0]); i
++)
70 struct fw3_ipt_handle
*
71 fw3_ipt_open(enum fw3_family family
, enum fw3_table table
)
73 struct fw3_ipt_handle
*h
;
75 h
= fw3_alloc(sizeof(*h
));
79 if (family
== FW3_FAMILY_V6
)
81 h
->family
= FW3_FAMILY_V6
;
83 h
->handle
= ip6tc_init(fw3_flag_names
[table
]);
85 xtables_set_params(&xtg6
);
86 xtables_set_nfproto(NFPROTO_IPV6
);
90 h
->family
= FW3_FAMILY_V4
;
92 h
->handle
= iptc_init(fw3_flag_names
[table
]);
94 xtables_set_params(&xtg
);
95 xtables_set_nfproto(NFPROTO_IPV4
);
104 xtables_pending_matches
= NULL
;
105 xtables_pending_targets
= NULL
;
107 xtables_matches
= NULL
;
108 xtables_targets
= NULL
;
110 fw3_init_extensions();
116 debug(struct fw3_ipt_handle
*h
, const char *fmt
, ...)
120 printf("%s -t %s ", (h
->family
== FW3_FAMILY_V6
) ? "ip6tables" : "iptables",
121 fw3_flag_names
[h
->table
]);
129 fw3_ipt_set_policy(struct fw3_ipt_handle
*h
, const char *chain
,
130 enum fw3_flag policy
)
133 debug(h
, "-P %s %s\n", chain
, fw3_flag_names
[policy
]);
135 if (h
->family
== FW3_FAMILY_V6
)
136 ip6tc_set_policy(chain
, fw3_flag_names
[policy
], NULL
, h
->handle
);
138 iptc_set_policy(chain
, fw3_flag_names
[policy
], NULL
, h
->handle
);
142 fw3_ipt_delete_chain(struct fw3_ipt_handle
*h
, const char *chain
)
146 debug(h
, "-F %s\n", chain
);
147 debug(h
, "-X %s\n", chain
);
150 if (h
->family
== FW3_FAMILY_V6
)
152 if (ip6tc_flush_entries(chain
, h
->handle
))
153 ip6tc_delete_chain(chain
, h
->handle
);
157 if (iptc_flush_entries(chain
, h
->handle
))
158 iptc_delete_chain(chain
, h
->handle
);
163 fw3_ipt_delete_rules(struct fw3_ipt_handle
*h
, const char *target
)
166 const struct ipt_entry
*e
;
167 const struct ip6t_entry
*e6
;
172 if (h
->family
== FW3_FAMILY_V6
)
174 for (chain
= ip6tc_first_chain(h
->handle
);
176 chain
= ip6tc_next_chain(h
->handle
))
181 for (num
= 0, e6
= ip6tc_first_rule(chain
, h
->handle
);
183 num
++, e6
= ip6tc_next_rule(e6
, h
->handle
))
185 t
= ip6tc_get_target(e6
, h
->handle
);
187 if (*t
&& !strcmp(t
, target
))
190 debug(h
, "-D %s %u\n", chain
, num
+ 1);
192 ip6tc_delete_num_entry(chain
, num
, h
->handle
);
202 for (chain
= iptc_first_chain(h
->handle
);
204 chain
= iptc_next_chain(h
->handle
))
209 for (num
= 0, e
= iptc_first_rule(chain
, h
->handle
);
211 num
++, e
= iptc_next_rule(e
, h
->handle
))
213 t
= iptc_get_target(e
, h
->handle
);
215 if (*t
&& !strcmp(t
, target
))
218 debug(h
, "-D %s %u\n", chain
, num
+ 1);
220 iptc_delete_num_entry(chain
, num
, h
->handle
);
231 fw3_ipt_create_chain(struct fw3_ipt_handle
*h
, const char *fmt
, ...)
237 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
241 debug(h
, "-N %s\n", buf
);
243 iptc_create_chain(buf
, h
->handle
);
247 fw3_ipt_flush(struct fw3_ipt_handle
*h
)
251 if (h
->family
== FW3_FAMILY_V6
)
253 for (chain
= ip6tc_first_chain(h
->handle
);
255 chain
= ip6tc_next_chain(h
->handle
))
257 ip6tc_flush_entries(chain
, h
->handle
);
260 for (chain
= ip6tc_first_chain(h
->handle
);
262 chain
= ip6tc_next_chain(h
->handle
))
264 ip6tc_delete_chain(chain
, h
->handle
);
269 for (chain
= iptc_first_chain(h
->handle
);
271 chain
= iptc_next_chain(h
->handle
))
273 iptc_flush_entries(chain
, h
->handle
);
276 for (chain
= iptc_first_chain(h
->handle
);
278 chain
= iptc_next_chain(h
->handle
))
280 iptc_delete_chain(chain
, h
->handle
);
286 fw3_ipt_commit(struct fw3_ipt_handle
*h
)
290 if (h
->family
== FW3_FAMILY_V6
)
292 rv
= ip6tc_commit(h
->handle
);
294 fprintf(stderr
, "ip6tc_commit(): %s\n", ip6tc_strerror(errno
));
298 rv
= iptc_commit(h
->handle
);
300 fprintf(stderr
, "iptc_commit(): %s\n", iptc_strerror(errno
));
306 struct fw3_ipt_rule
*
307 fw3_ipt_rule_new(struct fw3_ipt_handle
*h
)
309 struct fw3_ipt_rule
*r
;
311 r
= fw3_alloc(sizeof(*r
));
314 r
->argv
= fw3_alloc(sizeof(char *));
315 r
->argv
[r
->argc
++] = "fw3";
322 is_chain(struct fw3_ipt_handle
*h
, const char *name
)
324 if (h
->family
== FW3_FAMILY_V6
)
325 return ip6tc_is_chain(name
, h
->handle
);
327 return iptc_is_chain(name
, h
->handle
);
331 get_protoname(struct fw3_ipt_rule
*r
)
333 const struct xtables_pprot
*pp
;
336 for (pp
= xtables_chain_protos
; pp
->name
; pp
++)
337 if (pp
->num
== r
->protocol
)
338 return (char *)pp
->name
;
343 static struct xtables_match
*
344 find_match(struct fw3_ipt_rule
*r
, const char *name
)
346 return xtables_find_match(name
, XTF_TRY_LOAD
, &r
->matches
);
350 init_match(struct fw3_ipt_rule
*r
, struct xtables_match
*m
, bool no_clone
)
353 struct xtables_globals
*g
;
358 s
= XT_ALIGN(sizeof(struct xt_entry_match
)) + m
->size
;
361 strcpy(m
->m
->u
.user
.name
, m
->real_name
? m
->real_name
: m
->name
);
362 m
->m
->u
.user
.revision
= m
->revision
;
363 m
->m
->u
.match_size
= s
;
365 /* free previous userspace data */
369 m
->udata
= fw3_alloc(m
->udata_size
);
375 /* don't merge options if no_clone is set and this match is a clone */
376 if (no_clone
&& (m
== m
->next
))
379 /* merge option table */
380 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
383 g
->opts
= xtables_options_xfrm(g
->orig_opts
, g
->opts
,
384 m
->x6_options
, &m
->option_offset
);
387 g
->opts
= xtables_merge_options(g
->orig_opts
, g
->opts
,
388 m
->extra_opts
, &m
->option_offset
);
392 need_protomatch(struct fw3_ipt_rule
*r
, const char *pname
)
397 if (!xtables_find_match(pname
, XTF_DONT_LOAD
, NULL
))
400 return !r
->protocol_loaded
;
403 static struct xtables_match
*
404 load_protomatch(struct fw3_ipt_rule
*r
)
406 const char *pname
= get_protoname(r
);
408 if (!need_protomatch(r
, pname
))
411 return find_match(r
, pname
);
414 static struct xtables_target
*
415 get_target(struct fw3_ipt_rule
*r
, const char *name
)
418 struct xtables_target
*t
;
419 struct xtables_globals
*g
;
421 bool chain
= is_chain(r
->h
, name
);
424 t
= xtables_find_target(XT_STANDARD_TARGET
, XTF_LOAD_MUST_SUCCEED
);
426 t
= xtables_find_target(name
, XTF_TRY_LOAD
);
431 s
= XT_ALIGN(sizeof(struct xt_entry_target
)) + t
->size
;
435 strcpy(t
->t
->u
.user
.name
, name
);
437 strcpy(t
->t
->u
.user
.name
, t
->real_name
);
439 t
->t
->u
.user
.revision
= t
->revision
;
440 t
->t
->u
.target_size
= s
;
445 t
->udata
= fw3_alloc(t
->udata_size
);
451 /* merge option table */
452 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
455 g
->opts
= xtables_options_xfrm(g
->orig_opts
, g
->opts
,
456 t
->x6_options
, &t
->option_offset
);
458 g
->opts
= xtables_merge_options(g
->orig_opts
, g
->opts
,
459 t
->extra_opts
, &t
->option_offset
);
467 fw3_ipt_rule_proto(struct fw3_ipt_rule
*r
, struct fw3_protocol
*proto
)
471 if (!proto
|| proto
->any
)
474 pr
= proto
->protocol
;
476 if (r
->h
->family
== FW3_FAMILY_V6
)
481 r
->e6
.ipv6
.proto
= pr
;
482 r
->e6
.ipv6
.flags
|= IP6T_F_PROTO
;
485 r
->e6
.ipv6
.invflags
|= XT_INV_PROTO
;
492 r
->e
.ip
.invflags
|= XT_INV_PROTO
;
499 fw3_ipt_rule_in_out(struct fw3_ipt_rule
*r
,
500 struct fw3_device
*in
, struct fw3_device
*out
)
502 if (r
->h
->family
== FW3_FAMILY_V6
)
506 xtables_parse_interface(in
->name
, r
->e6
.ipv6
.iniface
,
507 r
->e6
.ipv6
.iniface_mask
);
510 r
->e6
.ipv6
.invflags
|= IP6T_INV_VIA_IN
;
513 if (out
&& !out
->any
)
515 xtables_parse_interface(out
->name
, r
->e6
.ipv6
.outiface
,
516 r
->e6
.ipv6
.outiface_mask
);
519 r
->e6
.ipv6
.invflags
|= IP6T_INV_VIA_OUT
;
526 xtables_parse_interface(in
->name
, r
->e
.ip
.iniface
,
527 r
->e
.ip
.iniface_mask
);
530 r
->e
.ip
.invflags
|= IPT_INV_VIA_IN
;
533 if (out
&& !out
->any
)
535 xtables_parse_interface(out
->name
, r
->e
.ip
.outiface
,
536 r
->e
.ip
.outiface_mask
);
539 r
->e
.ip
.invflags
|= IPT_INV_VIA_OUT
;
546 ip4prefix2mask(int prefix
, struct in_addr
*mask
)
548 mask
->s_addr
= htonl(~((1 << (32 - prefix
)) - 1));
552 ip6prefix2mask(int prefix
, struct in6_addr
*mask
)
554 char *p
= (char *)mask
;
558 memset(p
, 0xff, prefix
/ 8);
559 memset(p
+ (prefix
/ 8) + 1, 0, (128 - prefix
) / 8);
560 p
[prefix
/ 8] = 0xff << (8 - (prefix
& 7));
564 memset(mask
, 0, sizeof(*mask
));
569 fw3_ipt_rule_src_dest(struct fw3_ipt_rule
*r
,
570 struct fw3_address
*src
, struct fw3_address
*dest
)
574 if ((src
&& src
->range
) || (dest
&& dest
->range
))
576 fw3_ipt_rule_addarg(r
, false, "-m", "iprange");
583 fw3_ipt_rule_addarg(r
, src
->invert
, "--src-range",
584 fw3_address_to_string(src
, false));
586 else if (r
->h
->family
== FW3_FAMILY_V6
)
588 r
->e6
.ipv6
.src
= src
->address
.v6
;
589 ip6prefix2mask(src
->mask
, &r
->e6
.ipv6
.smsk
);
591 for (i
= 0; i
< 4; i
++)
592 r
->e6
.ipv6
.src
.s6_addr32
[i
] &= r
->e6
.ipv6
.smsk
.s6_addr32
[i
];
595 r
->e6
.ipv6
.invflags
|= IP6T_INV_SRCIP
;
599 r
->e
.ip
.src
= src
->address
.v4
;
600 ip4prefix2mask(src
->mask
, &r
->e
.ip
.smsk
);
602 r
->e
.ip
.src
.s_addr
&= r
->e
.ip
.smsk
.s_addr
;
605 r
->e
.ip
.invflags
|= IPT_INV_SRCIP
;
609 if (dest
&& dest
->set
)
613 fw3_ipt_rule_addarg(r
, dest
->invert
, "--dst-range",
614 fw3_address_to_string(dest
, false));
616 else if (r
->h
->family
== FW3_FAMILY_V6
)
618 r
->e6
.ipv6
.dst
= dest
->address
.v6
;
619 ip6prefix2mask(dest
->mask
, &r
->e6
.ipv6
.dmsk
);
621 for (i
= 0; i
< 4; i
++)
622 r
->e6
.ipv6
.dst
.s6_addr32
[i
] &= r
->e6
.ipv6
.dmsk
.s6_addr32
[i
];
625 r
->e6
.ipv6
.invflags
|= IP6T_INV_DSTIP
;
629 r
->e
.ip
.dst
= dest
->address
.v4
;
630 ip4prefix2mask(dest
->mask
, &r
->e
.ip
.dmsk
);
632 r
->e
.ip
.dst
.s_addr
&= r
->e
.ip
.dmsk
.s_addr
;
635 r
->e
.ip
.invflags
|= IPT_INV_DSTIP
;
641 fw3_ipt_rule_sport_dport(struct fw3_ipt_rule
*r
,
642 struct fw3_port
*sp
, struct fw3_port
*dp
)
644 char buf
[sizeof("65535:65535\0")];
646 if ((!sp
|| !sp
->set
) && (!dp
|| !dp
->set
))
649 if (!get_protoname(r
))
654 if (sp
->port_min
== sp
->port_max
)
655 sprintf(buf
, "%u", sp
->port_min
);
657 sprintf(buf
, "%u:%u", sp
->port_min
, sp
->port_max
);
659 fw3_ipt_rule_addarg(r
, sp
->invert
, "--sport", buf
);
664 if (dp
->port_min
== dp
->port_max
)
665 sprintf(buf
, "%u", dp
->port_min
);
667 sprintf(buf
, "%u:%u", dp
->port_min
, dp
->port_max
);
669 fw3_ipt_rule_addarg(r
, dp
->invert
, "--dport", buf
);
674 fw3_ipt_rule_mac(struct fw3_ipt_rule
*r
, struct fw3_mac
*mac
)
679 fw3_ipt_rule_addarg(r
, false, "-m", "mac");
680 fw3_ipt_rule_addarg(r
, mac
->invert
, "--mac-source", ether_ntoa(&mac
->mac
));
684 fw3_ipt_rule_icmptype(struct fw3_ipt_rule
*r
, struct fw3_icmptype
*icmp
)
686 char buf
[sizeof("255/255\0")];
691 if (r
->h
->family
== FW3_FAMILY_V6
)
693 if (icmp
->code6_min
== 0 && icmp
->code6_max
== 0xFF)
694 sprintf(buf
, "%u", icmp
->type6
);
696 sprintf(buf
, "%u/%u", icmp
->type6
, icmp
->code6_min
);
698 fw3_ipt_rule_addarg(r
, icmp
->invert
, "--icmpv6-type", buf
);
702 if (icmp
->code_min
== 0 && icmp
->code_max
== 0xFF)
703 sprintf(buf
, "%u", icmp
->type
);
705 sprintf(buf
, "%u/%u", icmp
->type
, icmp
->code_min
);
707 fw3_ipt_rule_addarg(r
, icmp
->invert
, "--icmp-type", buf
);
712 fw3_ipt_rule_limit(struct fw3_ipt_rule
*r
, struct fw3_limit
*limit
)
714 char buf
[sizeof("-4294967296/second\0")];
716 if (!limit
|| limit
->rate
<= 0)
719 fw3_ipt_rule_addarg(r
, false, "-m", "limit");
721 sprintf(buf
, "%u/%s", limit
->rate
, fw3_limit_units
[limit
->unit
]);
722 fw3_ipt_rule_addarg(r
, limit
->invert
, "--limit", buf
);
724 if (limit
->burst
> 0)
726 sprintf(buf
, "%u", limit
->burst
);
727 fw3_ipt_rule_addarg(r
, limit
->invert
, "--limit-burst", buf
);
732 fw3_ipt_rule_ipset(struct fw3_ipt_rule
*r
, struct fw3_ipset
*ipset
,
735 char buf
[sizeof("dst,dst,dst\0")];
738 struct fw3_ipset_datatype
*type
;
743 list_for_each_entry(type
, &ipset
->datatypes
, list
)
748 p
+= sprintf(p
, "%s", type
->dest
? "dst" : "src");
751 fw3_ipt_rule_addarg(r
, false, "-m", "set");
753 fw3_ipt_rule_addarg(r
, invert
, "--match-set",
754 ipset
->external
? ipset
->external
: ipset
->name
);
756 fw3_ipt_rule_addarg(r
, false, buf
, NULL
);
760 fw3_ipt_rule_time(struct fw3_ipt_rule
*r
, struct fw3_time
*time
)
763 struct tm empty
= { 0 };
765 char buf
[84]; /* sizeof("1,2,3,...,30,31\0") */
768 bool d1
= memcmp(&time
->datestart
, &empty
, sizeof(empty
));
769 bool d2
= memcmp(&time
->datestop
, &empty
, sizeof(empty
));
771 if (!d1
&& !d2
&& !time
->timestart
&& !time
->timestop
&&
772 !(time
->monthdays
& 0xFFFFFFFE) && !(time
->weekdays
& 0xFE))
777 fw3_ipt_rule_addarg(r
, false, "-m", "time");
780 fw3_ipt_rule_addarg(r
, false, "--utc", NULL
);
784 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestart
);
785 fw3_ipt_rule_addarg(r
, false, "--datestart", buf
);
790 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestop
);
791 fw3_ipt_rule_addarg(r
, false, "--datestop", buf
);
796 sprintf(buf
, "%02d:%02d:%02d",
797 time
->timestart
/ 3600,
798 time
->timestart
% 3600 / 60,
799 time
->timestart
% 60);
801 fw3_ipt_rule_addarg(r
, false, "--timestart", buf
);
806 sprintf(buf
, "%02d:%02d:%02d",
807 time
->timestop
/ 3600,
808 time
->timestop
% 3600 / 60,
809 time
->timestop
% 60);
811 fw3_ipt_rule_addarg(r
, false, "--timestop", buf
);
814 if (time
->monthdays
& 0xFFFFFFFE)
816 for (i
= 1, p
= buf
; i
< 32; i
++)
818 if (hasbit(time
->monthdays
, i
))
823 p
+= sprintf(p
, "%u", i
);
827 fw3_ipt_rule_addarg(r
, hasbit(time
->monthdays
, 0), "--monthdays", buf
);
830 if (time
->weekdays
& 0xFE)
832 for (i
= 1, p
= buf
; i
< 8; i
++)
834 if (hasbit(time
->weekdays
, i
))
839 p
+= sprintf(p
, "%u", i
);
843 fw3_ipt_rule_addarg(r
, hasbit(time
->weekdays
, 0), "--weekdays", buf
);
848 fw3_ipt_rule_mark(struct fw3_ipt_rule
*r
, struct fw3_mark
*mark
)
850 char buf
[sizeof("0xFFFFFFFF/0xFFFFFFFF\0")];
852 if (!mark
|| !mark
->set
)
855 if (mark
->mask
< 0xFFFFFFFF)
856 sprintf(buf
, "0x%x/0x%x", mark
->mark
, mark
->mask
);
858 sprintf(buf
, "0x%x", mark
->mark
);
860 fw3_ipt_rule_addarg(r
, false, "-m", "mark");
861 fw3_ipt_rule_addarg(r
, mark
->invert
, "--mark", buf
);
865 fw3_ipt_rule_comment(struct fw3_ipt_rule
*r
, const char *fmt
, ...)
874 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
877 fw3_ipt_rule_addarg(r
, false, "-m", "comment");
878 fw3_ipt_rule_addarg(r
, false, "--comment", buf
);
882 fw3_ipt_rule_extra(struct fw3_ipt_rule
*r
, const char *extra
)
886 if (!extra
|| !*extra
)
889 s
= fw3_strdup(extra
);
891 for (p
= strtok(s
, " \t"); p
; p
= strtok(NULL
, " \t"))
893 tmp
= realloc(r
->argv
, (r
->argc
+ 1) * sizeof(*r
->argv
));
899 r
->argv
[r
->argc
++] = fw3_strdup(p
);
906 rule_print6(struct ip6t_entry
*e
)
908 char buf
[INET6_ADDRSTRLEN
];
911 if (e
->ipv6
.flags
& IP6T_F_PROTO
)
913 if (e
->ipv6
.flags
& XT_INV_PROTO
)
916 pname
= get_protoname(container_of(e
, struct fw3_ipt_rule
, e6
));
919 printf(" -p %s", pname
);
921 printf(" -p %u", e
->ipv6
.proto
);
924 if (e
->ipv6
.iniface
[0])
926 if (e
->ipv6
.flags
& IP6T_INV_VIA_IN
)
929 printf(" -i %s", e
->ipv6
.iniface
);
932 if (e
->ipv6
.outiface
[0])
934 if (e
->ipv6
.flags
& IP6T_INV_VIA_OUT
)
937 printf(" -o %s", e
->ipv6
.outiface
);
940 if (memcmp(&e
->ipv6
.src
, &in6addr_any
, sizeof(struct in6_addr
)))
942 if (e
->ipv6
.flags
& IP6T_INV_SRCIP
)
945 printf(" -s %s/%u", inet_ntop(AF_INET6
, &e
->ipv6
.src
, buf
, sizeof(buf
)),
946 xtables_ip6mask_to_cidr(&e
->ipv6
.smsk
));
949 if (memcmp(&e
->ipv6
.dst
, &in6addr_any
, sizeof(struct in6_addr
)))
951 if (e
->ipv6
.flags
& IP6T_INV_DSTIP
)
954 printf(" -d %s/%u", inet_ntop(AF_INET6
, &e
->ipv6
.dst
, buf
, sizeof(buf
)),
955 xtables_ip6mask_to_cidr(&e
->ipv6
.dmsk
));
960 rule_print4(struct ipt_entry
*e
)
962 struct in_addr in_zero
= { 0 };
963 char buf
[sizeof("255.255.255.255\0")];
968 if (e
->ip
.flags
& XT_INV_PROTO
)
971 pname
= get_protoname(container_of(e
, struct fw3_ipt_rule
, e
));
974 printf(" -p %s", pname
);
976 printf(" -p %u", e
->ip
.proto
);
979 if (e
->ip
.iniface
[0])
981 if (e
->ip
.flags
& IPT_INV_VIA_IN
)
984 printf(" -i %s", e
->ip
.iniface
);
987 if (e
->ip
.outiface
[0])
989 if (e
->ip
.flags
& IPT_INV_VIA_OUT
)
992 printf(" -o %s", e
->ip
.outiface
);
995 if (memcmp(&e
->ip
.src
, &in_zero
, sizeof(struct in_addr
)))
997 if (e
->ip
.flags
& IPT_INV_SRCIP
)
1000 printf(" -s %s/%u", inet_ntop(AF_INET
, &e
->ip
.src
, buf
, sizeof(buf
)),
1001 xtables_ipmask_to_cidr(&e
->ip
.smsk
));
1004 if (memcmp(&e
->ip
.dst
, &in_zero
, sizeof(struct in_addr
)))
1006 if (e
->ip
.flags
& IPT_INV_DSTIP
)
1009 printf(" -d %s/%u", inet_ntop(AF_INET
, &e
->ip
.dst
, buf
, sizeof(buf
)),
1010 xtables_ipmask_to_cidr(&e
->ip
.dmsk
));
1015 rule_print(struct fw3_ipt_rule
*r
, const char *chain
)
1017 struct xtables_rule_match
*rm
;
1018 struct xtables_match
*m
;
1019 struct xtables_target
*t
;
1021 debug(r
->h
, "-A %s", chain
);
1023 if (r
->h
->family
== FW3_FAMILY_V6
)
1024 rule_print6(&r
->e6
);
1028 for (rm
= r
->matches
; rm
; rm
= rm
->next
)
1031 printf(" -m %s", m
->alias
? m
->alias(m
->m
) : m
->m
->u
.user
.name
);
1034 m
->save(&r
->e
.ip
, m
->m
);
1040 printf(" -j %s", t
->alias
? t
->alias(t
->t
) : t
->t
->u
.user
.name
);
1043 t
->save(&r
->e
.ip
, t
->t
);
1050 parse_option(struct fw3_ipt_rule
*r
, int optc
, bool inv
)
1052 struct xtables_rule_match
*m
;
1053 struct xtables_match
*em
;
1055 /* is a target option */
1056 if (r
->target
&& (r
->target
->parse
|| r
->target
->x6_parse
) &&
1057 optc
>= r
->target
->option_offset
&&
1058 optc
< (r
->target
->option_offset
+ 256))
1060 xtables_option_tpcall(optc
, r
->argv
, inv
, r
->target
, &r
->e
);
1064 /* try to dispatch argument to one of the match parsers */
1065 for (m
= r
->matches
; m
; m
= m
->next
)
1069 if (m
->completed
|| (!em
->parse
&& !em
->x6_parse
))
1072 if (optc
< em
->option_offset
||
1073 optc
>= (em
->option_offset
+ 256))
1076 xtables_option_mpcall(optc
, r
->argv
, inv
, em
, &r
->e
);
1080 /* unhandled option, might belong to a protocol match */
1081 if ((em
= load_protomatch(r
)) != NULL
)
1083 init_match(r
, em
, false);
1085 r
->protocol_loaded
= true;
1092 fprintf(stderr
, "parse_option(): option '%s' needs argument\n",
1096 fprintf(stderr
, "parse_option(): unknown option '%s'\n",
1103 fw3_ipt_rule_addarg(struct fw3_ipt_rule
*r
, bool inv
,
1104 const char *k
, const char *v
)
1112 n
= inv
+ !!k
+ !!v
;
1113 tmp
= realloc(r
->argv
, (r
->argc
+ n
) * sizeof(*tmp
));
1121 r
->argv
[r
->argc
++] = fw3_strdup("!");
1123 r
->argv
[r
->argc
++] = fw3_strdup(k
);
1126 r
->argv
[r
->argc
++] = fw3_strdup(v
);
1130 fw3_ipt_rule_append(struct fw3_ipt_rule
*r
, const char *fmt
, ...)
1133 struct xtables_rule_match
*m
;
1134 struct xtables_match
*em
;
1135 struct xtables_target
*et
;
1136 struct xtables_globals
*g
;
1137 struct ipt_entry
*e
;
1138 struct ip6t_entry
*e6
;
1146 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
1149 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
1150 g
->opts
= g
->orig_opts
;
1155 while ((optc
= getopt_long(r
->argc
, r
->argv
, "m:j:", g
->opts
, NULL
)) != -1)
1160 em
= find_match(r
, optarg
);
1164 fprintf(stderr
, "fw3_ipt_rule_append(): Can't find match '%s'\n", optarg
);
1168 init_match(r
, em
, true);
1172 et
= get_target(r
, optarg
);
1176 fprintf(stderr
, "fw3_ipt_rule_append(): Can't find target '%s'\n", optarg
);
1183 if ((optarg
[0] == '!') && (optarg
[1] == '\0'))
1189 fprintf(stderr
, "fw3_ipt_rule_append(): Bad argument '%s'\n", optarg
);
1193 if (parse_option(r
, optc
, inv
))
1201 for (m
= r
->matches
; m
; m
= m
->next
)
1202 xtables_option_mfcall(m
->match
);
1205 xtables_option_tfcall(r
->target
);
1210 if (r
->h
->family
== FW3_FAMILY_V6
)
1212 s
= XT_ALIGN(sizeof(struct ip6t_entry
));
1214 for (m
= r
->matches
; m
; m
= m
->next
)
1215 s
+= m
->match
->m
->u
.match_size
;
1217 e6
= fw3_alloc(s
+ r
->target
->t
->u
.target_size
);
1219 memcpy(e6
, &r
->e6
, sizeof(struct ip6t_entry
));
1221 e6
->target_offset
= s
;
1222 e6
->next_offset
= s
+ r
->target
->t
->u
.target_size
;
1226 for (m
= r
->matches
; m
; m
= m
->next
)
1228 memcpy(e6
->elems
+ s
, m
->match
->m
, m
->match
->m
->u
.match_size
);
1229 s
+= m
->match
->m
->u
.match_size
;
1232 memcpy(e6
->elems
+ s
, r
->target
->t
, r
->target
->t
->u
.target_size
);
1233 ip6tc_append_entry(buf
, e6
, r
->h
->handle
);
1238 s
= XT_ALIGN(sizeof(struct ipt_entry
));
1240 for (m
= r
->matches
; m
; m
= m
->next
)
1241 s
+= m
->match
->m
->u
.match_size
;
1243 e
= fw3_alloc(s
+ r
->target
->t
->u
.target_size
);
1245 memcpy(e
, &r
->e
, sizeof(struct ipt_entry
));
1247 e
->target_offset
= s
;
1248 e
->next_offset
= s
+ r
->target
->t
->u
.target_size
;
1252 for (m
= r
->matches
; m
; m
= m
->next
)
1254 memcpy(e
->elems
+ s
, m
->match
->m
, m
->match
->m
->u
.match_size
);
1255 s
+= m
->match
->m
->u
.match_size
;
1258 memcpy(e
->elems
+ s
, r
->target
->t
, r
->target
->t
->u
.target_size
);
1260 if (!iptc_append_entry(buf
, e
, r
->h
->handle
))
1261 fprintf(stderr
, "iptc_append_entry(): %s\n", iptc_strerror(errno
));
1267 for (i
= 1; i
< r
->argc
; i
++)
1272 xtables_rule_matches_free(&r
->matches
);
1277 /* reset all targets and matches */
1278 for (em
= xtables_matches
; em
; em
= em
->next
)
1281 for (et
= xtables_targets
; et
; et
= et
->next
)
1287 xtables_free_opts(1);
1290 struct fw3_ipt_rule
*
1291 fw3_ipt_rule_create(struct fw3_ipt_handle
*handle
, struct fw3_protocol
*proto
,
1292 struct fw3_device
*in
, struct fw3_device
*out
,
1293 struct fw3_address
*src
, struct fw3_address
*dest
)
1295 struct fw3_ipt_rule
*r
;
1297 r
= fw3_ipt_rule_new(handle
);
1299 fw3_ipt_rule_proto(r
, proto
);
1300 fw3_ipt_rule_in_out(r
, in
, out
);
1301 fw3_ipt_rule_src_dest(r
, src
, dest
);