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
);
57 struct fw3_ipt_handle
*
58 fw3_ipt_open(enum fw3_family family
, enum fw3_table table
)
60 struct fw3_ipt_handle
*h
;
62 h
= fw3_alloc(sizeof(*h
));
66 if (family
== FW3_FAMILY_V6
)
68 h
->family
= FW3_FAMILY_V6
;
70 h
->handle
= ip6tc_init(fw3_flag_names
[table
]);
72 xtables_set_params(&xtg6
);
73 xtables_set_nfproto(NFPROTO_IPV6
);
77 h
->family
= FW3_FAMILY_V4
;
79 h
->handle
= iptc_init(fw3_flag_names
[table
]);
81 xtables_set_params(&xtg
);
82 xtables_set_nfproto(NFPROTO_IPV4
);
91 xtables_pending_matches
= NULL
;
92 xtables_pending_targets
= NULL
;
94 xtables_matches
= NULL
;
95 xtables_targets
= NULL
;
105 debug(struct fw3_ipt_handle
*h
, const char *fmt
, ...)
109 printf("%s -t %s ", (h
->family
== FW3_FAMILY_V6
) ? "ip6tables" : "iptables",
110 fw3_flag_names
[h
->table
]);
118 fw3_ipt_set_policy(struct fw3_ipt_handle
*h
, const char *chain
,
119 enum fw3_flag policy
)
122 debug(h
, "-P %s %s\n", chain
, fw3_flag_names
[policy
]);
124 if (h
->family
== FW3_FAMILY_V6
)
125 ip6tc_set_policy(chain
, fw3_flag_names
[policy
], NULL
, h
->handle
);
127 iptc_set_policy(chain
, fw3_flag_names
[policy
], NULL
, h
->handle
);
131 fw3_ipt_delete_chain(struct fw3_ipt_handle
*h
, const char *chain
)
135 debug(h
, "-F %s\n", chain
);
136 debug(h
, "-X %s\n", chain
);
139 if (h
->family
== FW3_FAMILY_V6
)
141 if (ip6tc_flush_entries(chain
, h
->handle
))
142 ip6tc_delete_chain(chain
, h
->handle
);
146 if (iptc_flush_entries(chain
, h
->handle
))
147 iptc_delete_chain(chain
, h
->handle
);
152 fw3_ipt_delete_rules(struct fw3_ipt_handle
*h
, const char *target
)
155 const struct ipt_entry
*e
;
156 const struct ip6t_entry
*e6
;
161 if (h
->family
== FW3_FAMILY_V6
)
163 for (chain
= ip6tc_first_chain(h
->handle
);
165 chain
= ip6tc_next_chain(h
->handle
))
170 for (num
= 0, e6
= ip6tc_first_rule(chain
, h
->handle
);
172 num
++, e6
= ip6tc_next_rule(e6
, h
->handle
))
174 t
= ip6tc_get_target(e6
, h
->handle
);
176 if (*t
&& !strcmp(t
, target
))
179 debug(h
, "-D %s %u\n", chain
, num
+ 1);
181 ip6tc_delete_num_entry(chain
, num
, h
->handle
);
191 for (chain
= iptc_first_chain(h
->handle
);
193 chain
= iptc_next_chain(h
->handle
))
198 for (num
= 0, e
= iptc_first_rule(chain
, h
->handle
);
200 num
++, e
= iptc_next_rule(e
, h
->handle
))
202 t
= iptc_get_target(e
, h
->handle
);
204 if (*t
&& !strcmp(t
, target
))
207 debug(h
, "-D %s %u\n", chain
, num
+ 1);
209 iptc_delete_num_entry(chain
, num
, h
->handle
);
220 fw3_ipt_create_chain(struct fw3_ipt_handle
*h
, const char *fmt
, ...)
226 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
230 debug(h
, "-N %s\n", buf
);
232 iptc_create_chain(buf
, h
->handle
);
236 fw3_ipt_flush(struct fw3_ipt_handle
*h
)
240 if (h
->family
== FW3_FAMILY_V6
)
242 for (chain
= ip6tc_first_chain(h
->handle
);
244 chain
= ip6tc_next_chain(h
->handle
))
246 ip6tc_flush_entries(chain
, h
->handle
);
249 for (chain
= ip6tc_first_chain(h
->handle
);
251 chain
= ip6tc_next_chain(h
->handle
))
253 ip6tc_delete_chain(chain
, h
->handle
);
258 for (chain
= iptc_first_chain(h
->handle
);
260 chain
= iptc_next_chain(h
->handle
))
262 iptc_flush_entries(chain
, h
->handle
);
265 for (chain
= iptc_first_chain(h
->handle
);
267 chain
= iptc_next_chain(h
->handle
))
269 iptc_delete_chain(chain
, h
->handle
);
275 fw3_ipt_commit(struct fw3_ipt_handle
*h
)
279 if (h
->family
== FW3_FAMILY_V6
)
281 rv
= ip6tc_commit(h
->handle
);
283 fprintf(stderr
, "ip6tc_commit(): %s\n", ip6tc_strerror(errno
));
287 rv
= iptc_commit(h
->handle
);
289 fprintf(stderr
, "iptc_commit(): %s\n", iptc_strerror(errno
));
295 struct fw3_ipt_rule
*
296 fw3_ipt_rule_new(struct fw3_ipt_handle
*h
)
298 struct fw3_ipt_rule
*r
;
300 r
= fw3_alloc(sizeof(*r
));
303 r
->argv
= fw3_alloc(sizeof(char *));
304 r
->argv
[r
->argc
++] = "fw3";
311 is_chain(struct fw3_ipt_handle
*h
, const char *name
)
313 if (h
->family
== FW3_FAMILY_V6
)
314 return ip6tc_is_chain(name
, h
->handle
);
316 return iptc_is_chain(name
, h
->handle
);
320 get_protoname(struct fw3_ipt_rule
*r
)
322 const struct xtables_pprot
*pp
;
325 for (pp
= xtables_chain_protos
; pp
->name
; pp
++)
326 if (pp
->num
== r
->protocol
)
327 return (char *)pp
->name
;
332 static struct xtables_match
*
333 find_match(struct fw3_ipt_rule
*r
, const char *name
)
335 return xtables_find_match(name
, XTF_TRY_LOAD
, &r
->matches
);
339 init_match(struct fw3_ipt_rule
*r
, struct xtables_match
*m
, bool no_clone
)
342 struct xtables_globals
*g
;
347 s
= XT_ALIGN(sizeof(struct xt_entry_match
)) + m
->size
;
350 strcpy(m
->m
->u
.user
.name
, m
->real_name
? m
->real_name
: m
->name
);
351 m
->m
->u
.user
.revision
= m
->revision
;
352 m
->m
->u
.match_size
= s
;
354 /* free previous userspace data */
358 m
->udata
= fw3_alloc(m
->udata_size
);
364 /* don't merge options if no_clone is set and this match is a clone */
365 if (no_clone
&& (m
== m
->next
))
368 /* merge option table */
369 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
372 g
->opts
= xtables_options_xfrm(g
->orig_opts
, g
->opts
,
373 m
->x6_options
, &m
->option_offset
);
376 g
->opts
= xtables_merge_options(g
->orig_opts
, g
->opts
,
377 m
->extra_opts
, &m
->option_offset
);
381 need_protomatch(struct fw3_ipt_rule
*r
, const char *pname
)
386 if (!xtables_find_match(pname
, XTF_DONT_LOAD
, NULL
))
389 return !r
->protocol_loaded
;
392 static struct xtables_match
*
393 load_protomatch(struct fw3_ipt_rule
*r
)
395 const char *pname
= get_protoname(r
);
397 if (!need_protomatch(r
, pname
))
400 return find_match(r
, pname
);
403 static struct xtables_target
*
404 get_target(struct fw3_ipt_rule
*r
, const char *name
)
407 struct xtables_target
*t
;
408 struct xtables_globals
*g
;
410 bool chain
= is_chain(r
->h
, name
);
413 t
= xtables_find_target(XT_STANDARD_TARGET
, XTF_LOAD_MUST_SUCCEED
);
415 t
= xtables_find_target(name
, XTF_TRY_LOAD
);
420 s
= XT_ALIGN(sizeof(struct xt_entry_target
)) + t
->size
;
424 strcpy(t
->t
->u
.user
.name
, name
);
426 strcpy(t
->t
->u
.user
.name
, t
->real_name
);
428 t
->t
->u
.user
.revision
= t
->revision
;
429 t
->t
->u
.target_size
= s
;
434 t
->udata
= fw3_alloc(t
->udata_size
);
440 /* merge option table */
441 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
444 g
->opts
= xtables_options_xfrm(g
->orig_opts
, g
->opts
,
445 t
->x6_options
, &t
->option_offset
);
447 g
->opts
= xtables_merge_options(g
->orig_opts
, g
->opts
,
448 t
->extra_opts
, &t
->option_offset
);
456 fw3_ipt_rule_proto(struct fw3_ipt_rule
*r
, struct fw3_protocol
*proto
)
460 if (!proto
|| proto
->any
)
463 pr
= proto
->protocol
;
465 if (r
->h
->family
== FW3_FAMILY_V6
)
470 r
->e6
.ipv6
.proto
= pr
;
471 r
->e6
.ipv6
.flags
|= IP6T_F_PROTO
;
474 r
->e6
.ipv6
.invflags
|= XT_INV_PROTO
;
481 r
->e
.ip
.invflags
|= XT_INV_PROTO
;
488 fw3_ipt_rule_in_out(struct fw3_ipt_rule
*r
,
489 struct fw3_device
*in
, struct fw3_device
*out
)
491 if (r
->h
->family
== FW3_FAMILY_V6
)
495 xtables_parse_interface(in
->name
, r
->e6
.ipv6
.iniface
,
496 r
->e6
.ipv6
.iniface_mask
);
499 r
->e6
.ipv6
.invflags
|= IP6T_INV_VIA_IN
;
502 if (out
&& !out
->any
)
504 xtables_parse_interface(out
->name
, r
->e6
.ipv6
.outiface
,
505 r
->e6
.ipv6
.outiface_mask
);
508 r
->e6
.ipv6
.invflags
|= IP6T_INV_VIA_OUT
;
515 xtables_parse_interface(in
->name
, r
->e
.ip
.iniface
,
516 r
->e
.ip
.iniface_mask
);
519 r
->e
.ip
.invflags
|= IPT_INV_VIA_IN
;
522 if (out
&& !out
->any
)
524 xtables_parse_interface(out
->name
, r
->e
.ip
.outiface
,
525 r
->e
.ip
.outiface_mask
);
528 r
->e
.ip
.invflags
|= IPT_INV_VIA_OUT
;
535 ip4prefix2mask(int prefix
, struct in_addr
*mask
)
537 mask
->s_addr
= htonl(~((1 << (32 - prefix
)) - 1));
541 ip6prefix2mask(int prefix
, struct in6_addr
*mask
)
543 char *p
= (char *)mask
;
547 memset(p
, 0xff, prefix
/ 8);
548 memset(p
+ (prefix
/ 8) + 1, 0, (128 - prefix
) / 8);
549 p
[prefix
/ 8] = 0xff << (8 - (prefix
& 7));
553 memset(mask
, 0, sizeof(*mask
));
558 fw3_ipt_rule_src_dest(struct fw3_ipt_rule
*r
,
559 struct fw3_address
*src
, struct fw3_address
*dest
)
563 if ((src
&& src
->range
) || (dest
&& dest
->range
))
565 fw3_ipt_rule_addarg(r
, false, "-m", "iprange");
572 fw3_ipt_rule_addarg(r
, src
->invert
, "--src-range",
573 fw3_address_to_string(src
, false));
575 else if (r
->h
->family
== FW3_FAMILY_V6
)
577 r
->e6
.ipv6
.src
= src
->address
.v6
;
578 ip6prefix2mask(src
->mask
, &r
->e6
.ipv6
.smsk
);
580 for (i
= 0; i
< 4; i
++)
581 r
->e6
.ipv6
.src
.s6_addr32
[i
] &= r
->e6
.ipv6
.smsk
.s6_addr32
[i
];
584 r
->e6
.ipv6
.invflags
|= IP6T_INV_SRCIP
;
588 r
->e
.ip
.src
= src
->address
.v4
;
589 ip4prefix2mask(src
->mask
, &r
->e
.ip
.smsk
);
591 r
->e
.ip
.src
.s_addr
&= r
->e
.ip
.smsk
.s_addr
;
594 r
->e
.ip
.invflags
|= IPT_INV_SRCIP
;
598 if (dest
&& dest
->set
)
602 fw3_ipt_rule_addarg(r
, dest
->invert
, "--dst-range",
603 fw3_address_to_string(dest
, false));
605 else if (r
->h
->family
== FW3_FAMILY_V6
)
607 r
->e6
.ipv6
.dst
= dest
->address
.v6
;
608 ip6prefix2mask(dest
->mask
, &r
->e6
.ipv6
.dmsk
);
610 for (i
= 0; i
< 4; i
++)
611 r
->e6
.ipv6
.dst
.s6_addr32
[i
] &= r
->e6
.ipv6
.dmsk
.s6_addr32
[i
];
614 r
->e6
.ipv6
.invflags
|= IP6T_INV_DSTIP
;
618 r
->e
.ip
.dst
= dest
->address
.v4
;
619 ip4prefix2mask(dest
->mask
, &r
->e
.ip
.dmsk
);
621 r
->e
.ip
.dst
.s_addr
&= r
->e
.ip
.dmsk
.s_addr
;
624 r
->e
.ip
.invflags
|= IPT_INV_DSTIP
;
630 fw3_ipt_rule_sport_dport(struct fw3_ipt_rule
*r
,
631 struct fw3_port
*sp
, struct fw3_port
*dp
)
633 char buf
[sizeof("65535:65535\0")];
635 if ((!sp
|| !sp
->set
) && (!dp
|| !dp
->set
))
638 if (!get_protoname(r
))
643 if (sp
->port_min
== sp
->port_max
)
644 sprintf(buf
, "%u", sp
->port_min
);
646 sprintf(buf
, "%u:%u", sp
->port_min
, sp
->port_max
);
648 fw3_ipt_rule_addarg(r
, sp
->invert
, "--sport", buf
);
653 if (dp
->port_min
== dp
->port_max
)
654 sprintf(buf
, "%u", dp
->port_min
);
656 sprintf(buf
, "%u:%u", dp
->port_min
, dp
->port_max
);
658 fw3_ipt_rule_addarg(r
, dp
->invert
, "--dport", buf
);
663 fw3_ipt_rule_mac(struct fw3_ipt_rule
*r
, struct fw3_mac
*mac
)
668 fw3_ipt_rule_addarg(r
, false, "-m", "mac");
669 fw3_ipt_rule_addarg(r
, mac
->invert
, "--mac-source", ether_ntoa(&mac
->mac
));
673 fw3_ipt_rule_icmptype(struct fw3_ipt_rule
*r
, struct fw3_icmptype
*icmp
)
675 char buf
[sizeof("255/255\0")];
680 if (r
->h
->family
== FW3_FAMILY_V6
)
682 if (icmp
->code6_min
== 0 && icmp
->code6_max
== 0xFF)
683 sprintf(buf
, "%u", icmp
->type6
);
685 sprintf(buf
, "%u/%u", icmp
->type6
, icmp
->code6_min
);
687 fw3_ipt_rule_addarg(r
, icmp
->invert
, "--icmpv6-type", buf
);
691 if (icmp
->code_min
== 0 && icmp
->code_max
== 0xFF)
692 sprintf(buf
, "%u", icmp
->type
);
694 sprintf(buf
, "%u/%u", icmp
->type
, icmp
->code_min
);
696 fw3_ipt_rule_addarg(r
, icmp
->invert
, "--icmp-type", buf
);
701 fw3_ipt_rule_limit(struct fw3_ipt_rule
*r
, struct fw3_limit
*limit
)
703 char buf
[sizeof("-4294967296/second\0")];
705 if (!limit
|| limit
->rate
<= 0)
708 fw3_ipt_rule_addarg(r
, false, "-m", "limit");
710 sprintf(buf
, "%u/%s", limit
->rate
, fw3_limit_units
[limit
->unit
]);
711 fw3_ipt_rule_addarg(r
, limit
->invert
, "--limit", buf
);
713 if (limit
->burst
> 0)
715 sprintf(buf
, "%u", limit
->burst
);
716 fw3_ipt_rule_addarg(r
, limit
->invert
, "--limit-burst", buf
);
721 fw3_ipt_rule_ipset(struct fw3_ipt_rule
*r
, struct fw3_ipset
*ipset
,
724 char buf
[sizeof("dst,dst,dst\0")];
727 struct fw3_ipset_datatype
*type
;
732 list_for_each_entry(type
, &ipset
->datatypes
, list
)
737 p
+= sprintf(p
, "%s", type
->dest
? "dst" : "src");
740 fw3_ipt_rule_addarg(r
, false, "-m", "set");
742 fw3_ipt_rule_addarg(r
, invert
, "--match-set",
743 ipset
->external
? ipset
->external
: ipset
->name
);
745 fw3_ipt_rule_addarg(r
, false, buf
, NULL
);
749 fw3_ipt_rule_time(struct fw3_ipt_rule
*r
, struct fw3_time
*time
)
752 struct tm empty
= { 0 };
754 char buf
[84]; /* sizeof("1,2,3,...,30,31\0") */
757 bool d1
= memcmp(&time
->datestart
, &empty
, sizeof(empty
));
758 bool d2
= memcmp(&time
->datestop
, &empty
, sizeof(empty
));
760 if (!d1
&& !d2
&& !time
->timestart
&& !time
->timestop
&&
761 !(time
->monthdays
& 0xFFFFFFFE) && !(time
->weekdays
& 0xFE))
766 fw3_ipt_rule_addarg(r
, false, "-m", "time");
769 fw3_ipt_rule_addarg(r
, false, "--utc", NULL
);
773 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestart
);
774 fw3_ipt_rule_addarg(r
, false, "--datestart", buf
);
779 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestop
);
780 fw3_ipt_rule_addarg(r
, false, "--datestop", buf
);
785 sprintf(buf
, "%02d:%02d:%02d",
786 time
->timestart
/ 3600,
787 time
->timestart
% 3600 / 60,
788 time
->timestart
% 60);
790 fw3_ipt_rule_addarg(r
, false, "--timestart", buf
);
795 sprintf(buf
, "%02d:%02d:%02d",
796 time
->timestop
/ 3600,
797 time
->timestop
% 3600 / 60,
798 time
->timestop
% 60);
800 fw3_ipt_rule_addarg(r
, false, "--timestop", buf
);
803 if (time
->monthdays
& 0xFFFFFFFE)
805 for (i
= 1, p
= buf
; i
< 32; i
++)
807 if (hasbit(time
->monthdays
, i
))
812 p
+= sprintf(p
, "%u", i
);
816 fw3_ipt_rule_addarg(r
, hasbit(time
->monthdays
, 0), "--monthdays", buf
);
819 if (time
->weekdays
& 0xFE)
821 for (i
= 1, p
= buf
; i
< 8; i
++)
823 if (hasbit(time
->weekdays
, i
))
828 p
+= sprintf(p
, "%u", i
);
832 fw3_ipt_rule_addarg(r
, hasbit(time
->weekdays
, 0), "--weekdays", buf
);
837 fw3_ipt_rule_mark(struct fw3_ipt_rule
*r
, struct fw3_mark
*mark
)
839 char buf
[sizeof("0xFFFFFFFF/0xFFFFFFFF\0")];
841 if (!mark
|| !mark
->set
)
844 if (mark
->mask
< 0xFFFFFFFF)
845 sprintf(buf
, "0x%x/0x%x", mark
->mark
, mark
->mask
);
847 sprintf(buf
, "0x%x", mark
->mark
);
849 fw3_ipt_rule_addarg(r
, false, "-m", "mark");
850 fw3_ipt_rule_addarg(r
, mark
->invert
, "--mark", buf
);
854 fw3_ipt_rule_comment(struct fw3_ipt_rule
*r
, const char *fmt
, ...)
863 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
866 fw3_ipt_rule_addarg(r
, false, "-m", "comment");
867 fw3_ipt_rule_addarg(r
, false, "--comment", buf
);
871 fw3_ipt_rule_extra(struct fw3_ipt_rule
*r
, const char *extra
)
875 if (!extra
|| !*extra
)
878 s
= fw3_strdup(extra
);
880 for (p
= strtok(s
, " \t"); p
; p
= strtok(NULL
, " \t"))
882 tmp
= realloc(r
->argv
, (r
->argc
+ 1) * sizeof(*r
->argv
));
888 r
->argv
[r
->argc
++] = fw3_strdup(p
);
895 rule_print6(struct ip6t_entry
*e
)
897 char buf
[INET6_ADDRSTRLEN
];
900 if (e
->ipv6
.flags
& IP6T_F_PROTO
)
902 if (e
->ipv6
.flags
& XT_INV_PROTO
)
905 pname
= get_protoname(container_of(e
, struct fw3_ipt_rule
, e6
));
908 printf(" -p %s", pname
);
910 printf(" -p %u", e
->ipv6
.proto
);
913 if (e
->ipv6
.iniface
[0])
915 if (e
->ipv6
.flags
& IP6T_INV_VIA_IN
)
918 printf(" -i %s", e
->ipv6
.iniface
);
921 if (e
->ipv6
.outiface
[0])
923 if (e
->ipv6
.flags
& IP6T_INV_VIA_OUT
)
926 printf(" -o %s", e
->ipv6
.outiface
);
929 if (memcmp(&e
->ipv6
.src
, &in6addr_any
, sizeof(struct in6_addr
)))
931 if (e
->ipv6
.flags
& IP6T_INV_SRCIP
)
934 printf(" -s %s/%u", inet_ntop(AF_INET6
, &e
->ipv6
.src
, buf
, sizeof(buf
)),
935 xtables_ip6mask_to_cidr(&e
->ipv6
.smsk
));
938 if (memcmp(&e
->ipv6
.dst
, &in6addr_any
, sizeof(struct in6_addr
)))
940 if (e
->ipv6
.flags
& IP6T_INV_DSTIP
)
943 printf(" -d %s/%u", inet_ntop(AF_INET6
, &e
->ipv6
.dst
, buf
, sizeof(buf
)),
944 xtables_ip6mask_to_cidr(&e
->ipv6
.dmsk
));
949 rule_print4(struct ipt_entry
*e
)
951 struct in_addr in_zero
= { 0 };
952 char buf
[sizeof("255.255.255.255\0")];
957 if (e
->ip
.flags
& XT_INV_PROTO
)
960 pname
= get_protoname(container_of(e
, struct fw3_ipt_rule
, e
));
963 printf(" -p %s", pname
);
965 printf(" -p %u", e
->ip
.proto
);
968 if (e
->ip
.iniface
[0])
970 if (e
->ip
.flags
& IPT_INV_VIA_IN
)
973 printf(" -i %s", e
->ip
.iniface
);
976 if (e
->ip
.outiface
[0])
978 if (e
->ip
.flags
& IPT_INV_VIA_OUT
)
981 printf(" -o %s", e
->ip
.outiface
);
984 if (memcmp(&e
->ip
.src
, &in_zero
, sizeof(struct in_addr
)))
986 if (e
->ip
.flags
& IPT_INV_SRCIP
)
989 printf(" -s %s/%u", inet_ntop(AF_INET
, &e
->ip
.src
, buf
, sizeof(buf
)),
990 xtables_ipmask_to_cidr(&e
->ip
.smsk
));
993 if (memcmp(&e
->ip
.dst
, &in_zero
, sizeof(struct in_addr
)))
995 if (e
->ip
.flags
& IPT_INV_DSTIP
)
998 printf(" -d %s/%u", inet_ntop(AF_INET
, &e
->ip
.dst
, buf
, sizeof(buf
)),
999 xtables_ipmask_to_cidr(&e
->ip
.dmsk
));
1004 rule_print(struct fw3_ipt_rule
*r
, const char *chain
)
1006 struct xtables_rule_match
*rm
;
1007 struct xtables_match
*m
;
1008 struct xtables_target
*t
;
1010 debug(r
->h
, "-A %s", chain
);
1012 if (r
->h
->family
== FW3_FAMILY_V6
)
1013 rule_print6(&r
->e6
);
1017 for (rm
= r
->matches
; rm
; rm
= rm
->next
)
1020 printf(" -m %s", m
->alias
? m
->alias(m
->m
) : m
->m
->u
.user
.name
);
1023 m
->save(&r
->e
.ip
, m
->m
);
1029 printf(" -j %s", t
->alias
? t
->alias(t
->t
) : t
->t
->u
.user
.name
);
1032 t
->save(&r
->e
.ip
, t
->t
);
1039 parse_option(struct fw3_ipt_rule
*r
, int optc
, bool inv
)
1041 struct xtables_rule_match
*m
;
1042 struct xtables_match
*em
;
1044 /* is a target option */
1045 if (r
->target
&& (r
->target
->parse
|| r
->target
->x6_parse
) &&
1046 optc
>= r
->target
->option_offset
&&
1047 optc
< (r
->target
->option_offset
+ 256))
1049 xtables_option_tpcall(optc
, r
->argv
, inv
, r
->target
, &r
->e
);
1053 /* try to dispatch argument to one of the match parsers */
1054 for (m
= r
->matches
; m
; m
= m
->next
)
1058 if (m
->completed
|| (!em
->parse
&& !em
->x6_parse
))
1061 if (optc
< em
->option_offset
||
1062 optc
>= (em
->option_offset
+ 256))
1065 xtables_option_mpcall(optc
, r
->argv
, inv
, em
, &r
->e
);
1069 /* unhandled option, might belong to a protocol match */
1070 if ((em
= load_protomatch(r
)) != NULL
)
1072 init_match(r
, em
, false);
1074 r
->protocol_loaded
= true;
1081 fprintf(stderr
, "parse_option(): option '%s' needs argument\n",
1085 fprintf(stderr
, "parse_option(): unknown option '%s'\n",
1092 fw3_ipt_rule_addarg(struct fw3_ipt_rule
*r
, bool inv
,
1093 const char *k
, const char *v
)
1101 n
= inv
+ !!k
+ !!v
;
1102 tmp
= realloc(r
->argv
, (r
->argc
+ n
) * sizeof(*tmp
));
1110 r
->argv
[r
->argc
++] = fw3_strdup("!");
1112 r
->argv
[r
->argc
++] = fw3_strdup(k
);
1115 r
->argv
[r
->argc
++] = fw3_strdup(v
);
1119 fw3_ipt_rule_append(struct fw3_ipt_rule
*r
, const char *fmt
, ...)
1122 struct xtables_rule_match
*m
;
1123 struct xtables_match
*em
;
1124 struct xtables_target
*et
;
1125 struct xtables_globals
*g
;
1126 struct ipt_entry
*e
;
1127 struct ip6t_entry
*e6
;
1135 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
1138 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
1139 g
->opts
= g
->orig_opts
;
1144 while ((optc
= getopt_long(r
->argc
, r
->argv
, "m:j:", g
->opts
, NULL
)) != -1)
1149 em
= find_match(r
, optarg
);
1153 fprintf(stderr
, "fw3_ipt_rule_append(): Can't find match '%s'\n", optarg
);
1157 init_match(r
, em
, true);
1161 et
= get_target(r
, optarg
);
1165 fprintf(stderr
, "fw3_ipt_rule_append(): Can't find target '%s'\n", optarg
);
1172 if ((optarg
[0] == '!') && (optarg
[1] == '\0'))
1178 fprintf(stderr
, "fw3_ipt_rule_append(): Bad argument '%s'\n", optarg
);
1182 if (parse_option(r
, optc
, inv
))
1190 for (m
= r
->matches
; m
; m
= m
->next
)
1191 xtables_option_mfcall(m
->match
);
1194 xtables_option_tfcall(r
->target
);
1199 if (r
->h
->family
== FW3_FAMILY_V6
)
1201 s
= XT_ALIGN(sizeof(struct ip6t_entry
));
1203 for (m
= r
->matches
; m
; m
= m
->next
)
1204 s
+= m
->match
->m
->u
.match_size
;
1206 e6
= fw3_alloc(s
+ r
->target
->t
->u
.target_size
);
1208 memcpy(e6
, &r
->e6
, sizeof(struct ip6t_entry
));
1210 e6
->target_offset
= s
;
1211 e6
->next_offset
= s
+ r
->target
->t
->u
.target_size
;
1215 for (m
= r
->matches
; m
; m
= m
->next
)
1217 memcpy(e6
->elems
+ s
, m
->match
->m
, m
->match
->m
->u
.match_size
);
1218 s
+= m
->match
->m
->u
.match_size
;
1221 memcpy(e6
->elems
+ s
, r
->target
->t
, r
->target
->t
->u
.target_size
);
1222 ip6tc_append_entry(buf
, e6
, r
->h
->handle
);
1227 s
= XT_ALIGN(sizeof(struct ipt_entry
));
1229 for (m
= r
->matches
; m
; m
= m
->next
)
1230 s
+= m
->match
->m
->u
.match_size
;
1232 e
= fw3_alloc(s
+ r
->target
->t
->u
.target_size
);
1234 memcpy(e
, &r
->e
, sizeof(struct ipt_entry
));
1236 e
->target_offset
= s
;
1237 e
->next_offset
= s
+ r
->target
->t
->u
.target_size
;
1241 for (m
= r
->matches
; m
; m
= m
->next
)
1243 memcpy(e
->elems
+ s
, m
->match
->m
, m
->match
->m
->u
.match_size
);
1244 s
+= m
->match
->m
->u
.match_size
;
1247 memcpy(e
->elems
+ s
, r
->target
->t
, r
->target
->t
->u
.target_size
);
1249 if (!iptc_append_entry(buf
, e
, r
->h
->handle
))
1250 fprintf(stderr
, "iptc_append_entry(): %s\n", iptc_strerror(errno
));
1255 for (i
= 1; i
< r
->argc
; i
++)
1260 xtables_rule_matches_free(&r
->matches
);
1265 /* reset all targets and matches */
1266 for (em
= xtables_matches
; em
; em
= em
->next
)
1269 for (et
= xtables_targets
; et
; et
= et
->next
)
1275 xtables_free_opts(1);
1278 struct fw3_ipt_rule
*
1279 fw3_ipt_rule_create(struct fw3_ipt_handle
*handle
, struct fw3_protocol
*proto
,
1280 struct fw3_device
*in
, struct fw3_device
*out
,
1281 struct fw3_address
*src
, struct fw3_address
*dest
)
1283 struct fw3_ipt_rule
*r
;
1285 r
= fw3_ipt_rule_new(handle
);
1287 fw3_ipt_rule_proto(r
, proto
);
1288 fw3_ipt_rule_in_out(r
, in
, out
);
1289 fw3_ipt_rule_src_dest(r
, src
, dest
);