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 */
42 int kernel_version
= 0;
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
= 0x10000 * x
+ 0x100 * 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
);
105 fw3_init_extensions();
111 debug(struct fw3_ipt_handle
*h
, const char *fmt
, ...)
115 printf("%s -t %s ", (h
->family
== FW3_FAMILY_V6
) ? "ip6tables" : "iptables",
116 fw3_flag_names
[h
->table
]);
124 fw3_ipt_set_policy(struct fw3_ipt_handle
*h
, const char *chain
,
125 enum fw3_flag policy
)
128 debug(h
, "-P %s %s\n", chain
, fw3_flag_names
[policy
]);
130 if (h
->family
== FW3_FAMILY_V6
)
131 ip6tc_set_policy(chain
, fw3_flag_names
[policy
], NULL
, h
->handle
);
133 iptc_set_policy(chain
, fw3_flag_names
[policy
], NULL
, h
->handle
);
137 fw3_ipt_delete_chain(struct fw3_ipt_handle
*h
, const char *chain
)
141 debug(h
, "-F %s\n", chain
);
142 debug(h
, "-X %s\n", chain
);
145 if (h
->family
== FW3_FAMILY_V6
)
147 if (ip6tc_flush_entries(chain
, h
->handle
))
148 ip6tc_delete_chain(chain
, h
->handle
);
152 if (iptc_flush_entries(chain
, h
->handle
))
153 iptc_delete_chain(chain
, h
->handle
);
158 fw3_ipt_delete_rules(struct fw3_ipt_handle
*h
, const char *target
)
161 const struct ipt_entry
*e
;
162 const struct ip6t_entry
*e6
;
167 if (h
->family
== FW3_FAMILY_V6
)
169 for (chain
= ip6tc_first_chain(h
->handle
);
171 chain
= ip6tc_next_chain(h
->handle
))
176 for (num
= 0, e6
= ip6tc_first_rule(chain
, h
->handle
);
178 num
++, e6
= ip6tc_next_rule(e6
, h
->handle
))
180 t
= ip6tc_get_target(e6
, h
->handle
);
182 if (*t
&& !strcmp(t
, target
))
185 debug(h
, "-D %s %u\n", chain
, num
+ 1);
187 ip6tc_delete_num_entry(chain
, num
, h
->handle
);
197 for (chain
= iptc_first_chain(h
->handle
);
199 chain
= iptc_next_chain(h
->handle
))
204 for (num
= 0, e
= iptc_first_rule(chain
, h
->handle
);
206 num
++, e
= iptc_next_rule(e
, h
->handle
))
208 t
= iptc_get_target(e
, h
->handle
);
210 if (*t
&& !strcmp(t
, target
))
213 debug(h
, "-D %s %u\n", chain
, num
+ 1);
215 iptc_delete_num_entry(chain
, num
, h
->handle
);
226 fw3_ipt_create_chain(struct fw3_ipt_handle
*h
, const char *fmt
, ...)
232 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
236 debug(h
, "-N %s\n", buf
);
238 iptc_create_chain(buf
, h
->handle
);
242 fw3_ipt_flush(struct fw3_ipt_handle
*h
)
246 if (h
->family
== FW3_FAMILY_V6
)
248 for (chain
= ip6tc_first_chain(h
->handle
);
250 chain
= ip6tc_next_chain(h
->handle
))
252 ip6tc_flush_entries(chain
, h
->handle
);
255 for (chain
= ip6tc_first_chain(h
->handle
);
257 chain
= ip6tc_next_chain(h
->handle
))
259 ip6tc_delete_chain(chain
, h
->handle
);
264 for (chain
= iptc_first_chain(h
->handle
);
266 chain
= iptc_next_chain(h
->handle
))
268 iptc_flush_entries(chain
, h
->handle
);
271 for (chain
= iptc_first_chain(h
->handle
);
273 chain
= iptc_next_chain(h
->handle
))
275 iptc_delete_chain(chain
, h
->handle
);
281 fw3_ipt_commit(struct fw3_ipt_handle
*h
)
285 if (h
->family
== FW3_FAMILY_V6
)
287 rv
= ip6tc_commit(h
->handle
);
289 fprintf(stderr
, "ip6tc_commit(): %s\n", ip6tc_strerror(errno
));
293 rv
= iptc_commit(h
->handle
);
295 fprintf(stderr
, "iptc_commit(): %s\n", iptc_strerror(errno
));
301 struct fw3_ipt_rule
*
302 fw3_ipt_rule_new(struct fw3_ipt_handle
*h
)
304 struct fw3_ipt_rule
*r
;
306 r
= fw3_alloc(sizeof(*r
));
309 r
->argv
= fw3_alloc(sizeof(char *));
310 r
->argv
[r
->argc
++] = "fw3";
317 is_chain(struct fw3_ipt_handle
*h
, const char *name
)
319 if (h
->family
== FW3_FAMILY_V6
)
320 return ip6tc_is_chain(name
, h
->handle
);
322 return iptc_is_chain(name
, h
->handle
);
326 get_protoname(struct fw3_ipt_rule
*r
)
328 const struct xtables_pprot
*pp
;
331 for (pp
= xtables_chain_protos
; pp
->name
; pp
++)
332 if (pp
->num
== r
->protocol
)
333 return (char *)pp
->name
;
338 static struct xtables_match
*
339 find_match(struct fw3_ipt_rule
*r
, const char *name
)
341 return xtables_find_match(name
, XTF_TRY_LOAD
, &r
->matches
);
345 init_match(struct fw3_ipt_rule
*r
, struct xtables_match
*m
, bool no_clone
)
348 struct xtables_globals
*g
;
353 s
= XT_ALIGN(sizeof(struct xt_entry_match
)) + m
->size
;
357 fw3_xt_set_match_name(m
);
359 m
->m
->u
.user
.revision
= m
->revision
;
360 m
->m
->u
.match_size
= s
;
362 /* free previous userspace data */
363 fw3_xt_free_match_udata(m
);
368 /* don't merge options if no_clone is set and this match is a clone */
369 if (no_clone
&& (m
== m
->next
))
372 /* merge option table */
373 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
374 fw3_xt_merge_match_options(g
, m
);
378 need_protomatch(struct fw3_ipt_rule
*r
, const char *pname
)
383 if (!xtables_find_match(pname
, XTF_DONT_LOAD
, NULL
))
386 return !r
->protocol_loaded
;
389 static struct xtables_match
*
390 load_protomatch(struct fw3_ipt_rule
*r
)
392 const char *pname
= get_protoname(r
);
394 if (!need_protomatch(r
, pname
))
397 return find_match(r
, pname
);
400 static struct xtables_target
*
401 get_target(struct fw3_ipt_rule
*r
, const char *name
)
404 struct xtables_target
*t
;
405 struct xtables_globals
*g
;
407 bool chain
= is_chain(r
->h
, name
);
410 t
= xtables_find_target(XT_STANDARD_TARGET
, XTF_LOAD_MUST_SUCCEED
);
412 t
= xtables_find_target(name
, XTF_TRY_LOAD
);
417 s
= XT_ALIGN(sizeof(struct xt_entry_target
)) + t
->size
;
420 fw3_xt_set_target_name(t
, name
);
422 t
->t
->u
.user
.revision
= t
->revision
;
423 t
->t
->u
.target_size
= s
;
425 /* free previous userspace data */
426 fw3_xt_free_target_udata(t
);
431 /* merge option table */
432 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
433 fw3_xt_merge_target_options(g
, t
);
441 fw3_ipt_rule_proto(struct fw3_ipt_rule
*r
, struct fw3_protocol
*proto
)
445 if (!proto
|| proto
->any
)
448 pr
= proto
->protocol
;
450 if (r
->h
->family
== FW3_FAMILY_V6
)
455 r
->e6
.ipv6
.proto
= pr
;
456 r
->e6
.ipv6
.flags
|= IP6T_F_PROTO
;
459 r
->e6
.ipv6
.invflags
|= XT_INV_PROTO
;
466 r
->e
.ip
.invflags
|= XT_INV_PROTO
;
473 fw3_ipt_rule_in_out(struct fw3_ipt_rule
*r
,
474 struct fw3_device
*in
, struct fw3_device
*out
)
476 if (r
->h
->family
== FW3_FAMILY_V6
)
480 xtables_parse_interface(in
->name
, r
->e6
.ipv6
.iniface
,
481 r
->e6
.ipv6
.iniface_mask
);
484 r
->e6
.ipv6
.invflags
|= IP6T_INV_VIA_IN
;
487 if (out
&& !out
->any
)
489 xtables_parse_interface(out
->name
, r
->e6
.ipv6
.outiface
,
490 r
->e6
.ipv6
.outiface_mask
);
493 r
->e6
.ipv6
.invflags
|= IP6T_INV_VIA_OUT
;
500 xtables_parse_interface(in
->name
, r
->e
.ip
.iniface
,
501 r
->e
.ip
.iniface_mask
);
504 r
->e
.ip
.invflags
|= IPT_INV_VIA_IN
;
507 if (out
&& !out
->any
)
509 xtables_parse_interface(out
->name
, r
->e
.ip
.outiface
,
510 r
->e
.ip
.outiface_mask
);
513 r
->e
.ip
.invflags
|= IPT_INV_VIA_OUT
;
520 ip4prefix2mask(int prefix
, struct in_addr
*mask
)
522 mask
->s_addr
= htonl(~((1 << (32 - prefix
)) - 1));
526 ip6prefix2mask(int prefix
, struct in6_addr
*mask
)
528 char *p
= (char *)mask
;
532 memset(p
, 0xff, prefix
/ 8);
533 memset(p
+ (prefix
/ 8) + 1, 0, (128 - prefix
) / 8);
534 p
[prefix
/ 8] = 0xff << (8 - (prefix
& 7));
538 memset(mask
, 0, sizeof(*mask
));
543 fw3_ipt_rule_src_dest(struct fw3_ipt_rule
*r
,
544 struct fw3_address
*src
, struct fw3_address
*dest
)
548 if ((src
&& src
->range
) || (dest
&& dest
->range
))
550 fw3_ipt_rule_addarg(r
, false, "-m", "iprange");
557 fw3_ipt_rule_addarg(r
, src
->invert
, "--src-range",
558 fw3_address_to_string(src
, false));
560 else if (r
->h
->family
== FW3_FAMILY_V6
)
562 r
->e6
.ipv6
.src
= src
->address
.v6
;
563 ip6prefix2mask(src
->mask
, &r
->e6
.ipv6
.smsk
);
565 for (i
= 0; i
< 4; i
++)
566 r
->e6
.ipv6
.src
.s6_addr32
[i
] &= r
->e6
.ipv6
.smsk
.s6_addr32
[i
];
569 r
->e6
.ipv6
.invflags
|= IP6T_INV_SRCIP
;
573 r
->e
.ip
.src
= src
->address
.v4
;
574 ip4prefix2mask(src
->mask
, &r
->e
.ip
.smsk
);
576 r
->e
.ip
.src
.s_addr
&= r
->e
.ip
.smsk
.s_addr
;
579 r
->e
.ip
.invflags
|= IPT_INV_SRCIP
;
583 if (dest
&& dest
->set
)
587 fw3_ipt_rule_addarg(r
, dest
->invert
, "--dst-range",
588 fw3_address_to_string(dest
, false));
590 else if (r
->h
->family
== FW3_FAMILY_V6
)
592 r
->e6
.ipv6
.dst
= dest
->address
.v6
;
593 ip6prefix2mask(dest
->mask
, &r
->e6
.ipv6
.dmsk
);
595 for (i
= 0; i
< 4; i
++)
596 r
->e6
.ipv6
.dst
.s6_addr32
[i
] &= r
->e6
.ipv6
.dmsk
.s6_addr32
[i
];
599 r
->e6
.ipv6
.invflags
|= IP6T_INV_DSTIP
;
603 r
->e
.ip
.dst
= dest
->address
.v4
;
604 ip4prefix2mask(dest
->mask
, &r
->e
.ip
.dmsk
);
606 r
->e
.ip
.dst
.s_addr
&= r
->e
.ip
.dmsk
.s_addr
;
609 r
->e
.ip
.invflags
|= IPT_INV_DSTIP
;
615 fw3_ipt_rule_sport_dport(struct fw3_ipt_rule
*r
,
616 struct fw3_port
*sp
, struct fw3_port
*dp
)
618 char buf
[sizeof("65535:65535\0")];
620 if ((!sp
|| !sp
->set
) && (!dp
|| !dp
->set
))
623 if (!get_protoname(r
))
628 if (sp
->port_min
== sp
->port_max
)
629 sprintf(buf
, "%u", sp
->port_min
);
631 sprintf(buf
, "%u:%u", sp
->port_min
, sp
->port_max
);
633 fw3_ipt_rule_addarg(r
, sp
->invert
, "--sport", buf
);
638 if (dp
->port_min
== dp
->port_max
)
639 sprintf(buf
, "%u", dp
->port_min
);
641 sprintf(buf
, "%u:%u", dp
->port_min
, dp
->port_max
);
643 fw3_ipt_rule_addarg(r
, dp
->invert
, "--dport", buf
);
648 fw3_ipt_rule_mac(struct fw3_ipt_rule
*r
, struct fw3_mac
*mac
)
653 fw3_ipt_rule_addarg(r
, false, "-m", "mac");
654 fw3_ipt_rule_addarg(r
, mac
->invert
, "--mac-source", ether_ntoa(&mac
->mac
));
658 fw3_ipt_rule_icmptype(struct fw3_ipt_rule
*r
, struct fw3_icmptype
*icmp
)
660 char buf
[sizeof("255/255\0")];
665 if (r
->h
->family
== FW3_FAMILY_V6
)
667 if (icmp
->code6_min
== 0 && icmp
->code6_max
== 0xFF)
668 sprintf(buf
, "%u", icmp
->type6
);
670 sprintf(buf
, "%u/%u", icmp
->type6
, icmp
->code6_min
);
672 fw3_ipt_rule_addarg(r
, icmp
->invert
, "--icmpv6-type", buf
);
676 if (icmp
->code_min
== 0 && icmp
->code_max
== 0xFF)
677 sprintf(buf
, "%u", icmp
->type
);
679 sprintf(buf
, "%u/%u", icmp
->type
, icmp
->code_min
);
681 fw3_ipt_rule_addarg(r
, icmp
->invert
, "--icmp-type", buf
);
686 fw3_ipt_rule_limit(struct fw3_ipt_rule
*r
, struct fw3_limit
*limit
)
688 char buf
[sizeof("-4294967296/second\0")];
690 if (!limit
|| limit
->rate
<= 0)
693 fw3_ipt_rule_addarg(r
, false, "-m", "limit");
695 sprintf(buf
, "%u/%s", limit
->rate
, fw3_limit_units
[limit
->unit
]);
696 fw3_ipt_rule_addarg(r
, limit
->invert
, "--limit", buf
);
698 if (limit
->burst
> 0)
700 sprintf(buf
, "%u", limit
->burst
);
701 fw3_ipt_rule_addarg(r
, limit
->invert
, "--limit-burst", buf
);
706 fw3_ipt_rule_ipset(struct fw3_ipt_rule
*r
, struct fw3_ipset
*ipset
,
709 char buf
[sizeof("dst,dst,dst\0")];
712 struct fw3_ipset_datatype
*type
;
717 list_for_each_entry(type
, &ipset
->datatypes
, list
)
722 p
+= sprintf(p
, "%s", type
->dest
? "dst" : "src");
725 fw3_ipt_rule_addarg(r
, false, "-m", "set");
727 fw3_ipt_rule_addarg(r
, invert
, "--match-set",
728 ipset
->external
? ipset
->external
: ipset
->name
);
730 fw3_ipt_rule_addarg(r
, false, buf
, NULL
);
734 fw3_ipt_rule_time(struct fw3_ipt_rule
*r
, struct fw3_time
*time
)
737 struct tm empty
= { 0 };
739 char buf
[84]; /* sizeof("1,2,3,...,30,31\0") */
742 bool d1
= memcmp(&time
->datestart
, &empty
, sizeof(empty
));
743 bool d2
= memcmp(&time
->datestop
, &empty
, sizeof(empty
));
745 if (!d1
&& !d2
&& !time
->timestart
&& !time
->timestop
&&
746 !(time
->monthdays
& 0xFFFFFFFE) && !(time
->weekdays
& 0xFE))
751 fw3_ipt_rule_addarg(r
, false, "-m", "time");
754 fw3_ipt_rule_addarg(r
, false, "--utc", NULL
);
758 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestart
);
759 fw3_ipt_rule_addarg(r
, false, "--datestart", buf
);
764 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestop
);
765 fw3_ipt_rule_addarg(r
, false, "--datestop", buf
);
770 sprintf(buf
, "%02d:%02d:%02d",
771 time
->timestart
/ 3600,
772 time
->timestart
% 3600 / 60,
773 time
->timestart
% 60);
775 fw3_ipt_rule_addarg(r
, false, "--timestart", buf
);
780 sprintf(buf
, "%02d:%02d:%02d",
781 time
->timestop
/ 3600,
782 time
->timestop
% 3600 / 60,
783 time
->timestop
% 60);
785 fw3_ipt_rule_addarg(r
, false, "--timestop", buf
);
788 if (time
->monthdays
& 0xFFFFFFFE)
790 for (i
= 1, p
= buf
; i
< 32; i
++)
792 if (hasbit(time
->monthdays
, i
))
797 p
+= sprintf(p
, "%u", i
);
801 fw3_ipt_rule_addarg(r
, hasbit(time
->monthdays
, 0), "--monthdays", buf
);
804 if (time
->weekdays
& 0xFE)
806 for (i
= 1, p
= buf
; i
< 8; i
++)
808 if (hasbit(time
->weekdays
, i
))
813 p
+= sprintf(p
, "%u", i
);
817 fw3_ipt_rule_addarg(r
, hasbit(time
->weekdays
, 0), "--weekdays", buf
);
822 fw3_ipt_rule_mark(struct fw3_ipt_rule
*r
, struct fw3_mark
*mark
)
824 char buf
[sizeof("0xFFFFFFFF/0xFFFFFFFF\0")];
826 if (!mark
|| !mark
->set
)
829 if (mark
->mask
< 0xFFFFFFFF)
830 sprintf(buf
, "0x%x/0x%x", mark
->mark
, mark
->mask
);
832 sprintf(buf
, "0x%x", mark
->mark
);
834 fw3_ipt_rule_addarg(r
, false, "-m", "mark");
835 fw3_ipt_rule_addarg(r
, mark
->invert
, "--mark", buf
);
839 fw3_ipt_rule_comment(struct fw3_ipt_rule
*r
, const char *fmt
, ...)
848 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
851 fw3_ipt_rule_addarg(r
, false, "-m", "comment");
852 fw3_ipt_rule_addarg(r
, false, "--comment", buf
);
856 fw3_ipt_rule_extra(struct fw3_ipt_rule
*r
, const char *extra
)
860 if (!extra
|| !*extra
)
863 s
= fw3_strdup(extra
);
865 for (p
= strtok(s
, " \t"); p
; p
= strtok(NULL
, " \t"))
867 tmp
= realloc(r
->argv
, (r
->argc
+ 1) * sizeof(*r
->argv
));
873 r
->argv
[r
->argc
++] = fw3_strdup(p
);
880 rule_print6(struct ip6t_entry
*e
)
882 char buf
[INET6_ADDRSTRLEN
];
885 if (e
->ipv6
.flags
& IP6T_F_PROTO
)
887 if (e
->ipv6
.flags
& XT_INV_PROTO
)
890 pname
= get_protoname(container_of(e
, struct fw3_ipt_rule
, e6
));
893 printf(" -p %s", pname
);
895 printf(" -p %u", e
->ipv6
.proto
);
898 if (e
->ipv6
.iniface
[0])
900 if (e
->ipv6
.flags
& IP6T_INV_VIA_IN
)
903 printf(" -i %s", e
->ipv6
.iniface
);
906 if (e
->ipv6
.outiface
[0])
908 if (e
->ipv6
.flags
& IP6T_INV_VIA_OUT
)
911 printf(" -o %s", e
->ipv6
.outiface
);
914 if (memcmp(&e
->ipv6
.src
, &in6addr_any
, sizeof(struct in6_addr
)))
916 if (e
->ipv6
.flags
& IP6T_INV_SRCIP
)
919 printf(" -s %s/%u", inet_ntop(AF_INET6
, &e
->ipv6
.src
, buf
, sizeof(buf
)),
920 xtables_ip6mask_to_cidr(&e
->ipv6
.smsk
));
923 if (memcmp(&e
->ipv6
.dst
, &in6addr_any
, sizeof(struct in6_addr
)))
925 if (e
->ipv6
.flags
& IP6T_INV_DSTIP
)
928 printf(" -d %s/%u", inet_ntop(AF_INET6
, &e
->ipv6
.dst
, buf
, sizeof(buf
)),
929 xtables_ip6mask_to_cidr(&e
->ipv6
.dmsk
));
934 rule_print4(struct ipt_entry
*e
)
936 struct in_addr in_zero
= { 0 };
937 char buf
[sizeof("255.255.255.255\0")];
942 if (e
->ip
.flags
& XT_INV_PROTO
)
945 pname
= get_protoname(container_of(e
, struct fw3_ipt_rule
, e
));
948 printf(" -p %s", pname
);
950 printf(" -p %u", e
->ip
.proto
);
953 if (e
->ip
.iniface
[0])
955 if (e
->ip
.flags
& IPT_INV_VIA_IN
)
958 printf(" -i %s", e
->ip
.iniface
);
961 if (e
->ip
.outiface
[0])
963 if (e
->ip
.flags
& IPT_INV_VIA_OUT
)
966 printf(" -o %s", e
->ip
.outiface
);
969 if (memcmp(&e
->ip
.src
, &in_zero
, sizeof(struct in_addr
)))
971 if (e
->ip
.flags
& IPT_INV_SRCIP
)
974 printf(" -s %s/%u", inet_ntop(AF_INET
, &e
->ip
.src
, buf
, sizeof(buf
)),
975 xtables_ipmask_to_cidr(&e
->ip
.smsk
));
978 if (memcmp(&e
->ip
.dst
, &in_zero
, sizeof(struct in_addr
)))
980 if (e
->ip
.flags
& IPT_INV_DSTIP
)
983 printf(" -d %s/%u", inet_ntop(AF_INET
, &e
->ip
.dst
, buf
, sizeof(buf
)),
984 xtables_ipmask_to_cidr(&e
->ip
.dmsk
));
989 rule_print(struct fw3_ipt_rule
*r
, const char *chain
)
991 struct xtables_rule_match
*rm
;
992 struct xtables_match
*m
;
993 struct xtables_target
*t
;
995 debug(r
->h
, "-A %s", chain
);
997 if (r
->h
->family
== FW3_FAMILY_V6
)
1002 for (rm
= r
->matches
; rm
; rm
= rm
->next
)
1005 printf(" -m %s", fw3_xt_get_match_name(m
));
1008 m
->save(&r
->e
.ip
, m
->m
);
1014 printf(" -j %s", fw3_xt_get_target_name(t
));
1017 t
->save(&r
->e
.ip
, t
->t
);
1024 parse_option(struct fw3_ipt_rule
*r
, int optc
, bool inv
)
1026 struct xtables_rule_match
*m
;
1027 struct xtables_match
*em
;
1029 /* is a target option */
1030 if (r
->target
&& fw3_xt_has_target_parse(r
->target
) &&
1031 optc
>= r
->target
->option_offset
&&
1032 optc
< (r
->target
->option_offset
+ 256))
1034 xtables_option_tpcall(optc
, r
->argv
, inv
, r
->target
, &r
->e
);
1038 /* try to dispatch argument to one of the match parsers */
1039 for (m
= r
->matches
; m
; m
= m
->next
)
1043 if (m
->completed
|| !fw3_xt_has_match_parse(em
))
1046 if (optc
< em
->option_offset
||
1047 optc
>= (em
->option_offset
+ 256))
1050 xtables_option_mpcall(optc
, r
->argv
, inv
, em
, &r
->e
);
1054 /* unhandled option, might belong to a protocol match */
1055 if ((em
= load_protomatch(r
)) != NULL
)
1057 init_match(r
, em
, false);
1059 r
->protocol_loaded
= true;
1066 fprintf(stderr
, "parse_option(): option '%s' needs argument\n",
1070 fprintf(stderr
, "parse_option(): unknown option '%s'\n",
1077 fw3_ipt_rule_addarg(struct fw3_ipt_rule
*r
, bool inv
,
1078 const char *k
, const char *v
)
1086 n
= inv
+ !!k
+ !!v
;
1087 tmp
= realloc(r
->argv
, (r
->argc
+ n
) * sizeof(*tmp
));
1095 r
->argv
[r
->argc
++] = fw3_strdup("!");
1097 r
->argv
[r
->argc
++] = fw3_strdup(k
);
1100 r
->argv
[r
->argc
++] = fw3_strdup(v
);
1104 fw3_ipt_rule_append(struct fw3_ipt_rule
*r
, const char *fmt
, ...)
1107 struct xtables_rule_match
*m
;
1108 struct xtables_match
*em
;
1109 struct xtables_target
*et
;
1110 struct xtables_globals
*g
;
1111 struct ipt_entry
*e
;
1112 struct ip6t_entry
*e6
;
1120 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
1123 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
1124 g
->opts
= g
->orig_opts
;
1129 while ((optc
= getopt_long(r
->argc
, r
->argv
, "m:j:", g
->opts
, NULL
)) != -1)
1134 em
= find_match(r
, optarg
);
1138 fprintf(stderr
, "fw3_ipt_rule_append(): Can't find match '%s'\n", optarg
);
1142 init_match(r
, em
, true);
1146 et
= get_target(r
, optarg
);
1150 fprintf(stderr
, "fw3_ipt_rule_append(): Can't find target '%s'\n", optarg
);
1157 if ((optarg
[0] == '!') && (optarg
[1] == '\0'))
1163 fprintf(stderr
, "fw3_ipt_rule_append(): Bad argument '%s'\n", optarg
);
1167 if (parse_option(r
, optc
, inv
))
1175 for (m
= r
->matches
; m
; m
= m
->next
)
1176 xtables_option_mfcall(m
->match
);
1179 xtables_option_tfcall(r
->target
);
1184 if (r
->h
->family
== FW3_FAMILY_V6
)
1186 s
= XT_ALIGN(sizeof(struct ip6t_entry
));
1188 for (m
= r
->matches
; m
; m
= m
->next
)
1189 s
+= m
->match
->m
->u
.match_size
;
1191 e6
= fw3_alloc(s
+ r
->target
->t
->u
.target_size
);
1193 memcpy(e6
, &r
->e6
, sizeof(struct ip6t_entry
));
1195 e6
->target_offset
= s
;
1196 e6
->next_offset
= s
+ r
->target
->t
->u
.target_size
;
1200 for (m
= r
->matches
; m
; m
= m
->next
)
1202 memcpy(e6
->elems
+ s
, m
->match
->m
, m
->match
->m
->u
.match_size
);
1203 s
+= m
->match
->m
->u
.match_size
;
1206 memcpy(e6
->elems
+ s
, r
->target
->t
, r
->target
->t
->u
.target_size
);
1207 ip6tc_append_entry(buf
, e6
, r
->h
->handle
);
1212 s
= XT_ALIGN(sizeof(struct ipt_entry
));
1214 for (m
= r
->matches
; m
; m
= m
->next
)
1215 s
+= m
->match
->m
->u
.match_size
;
1217 e
= fw3_alloc(s
+ r
->target
->t
->u
.target_size
);
1219 memcpy(e
, &r
->e
, sizeof(struct ipt_entry
));
1221 e
->target_offset
= s
;
1222 e
->next_offset
= s
+ r
->target
->t
->u
.target_size
;
1226 for (m
= r
->matches
; m
; m
= m
->next
)
1228 memcpy(e
->elems
+ s
, m
->match
->m
, m
->match
->m
->u
.match_size
);
1229 s
+= m
->match
->m
->u
.match_size
;
1232 memcpy(e
->elems
+ s
, r
->target
->t
, r
->target
->t
->u
.target_size
);
1234 if (!iptc_append_entry(buf
, e
, r
->h
->handle
))
1235 fprintf(stderr
, "iptc_append_entry(): %s\n", iptc_strerror(errno
));
1241 for (i
= 1; i
< r
->argc
; i
++)
1246 xtables_rule_matches_free(&r
->matches
);
1253 /* reset all targets and matches */
1254 for (em
= xtables_matches
; em
; em
= em
->next
)
1257 for (et
= xtables_targets
; et
; et
= et
->next
)
1263 xtables_free_opts(1);
1266 struct fw3_ipt_rule
*
1267 fw3_ipt_rule_create(struct fw3_ipt_handle
*handle
, struct fw3_protocol
*proto
,
1268 struct fw3_device
*in
, struct fw3_device
*out
,
1269 struct fw3_address
*src
, struct fw3_address
*dest
)
1271 struct fw3_ipt_rule
*r
;
1273 r
= fw3_ipt_rule_new(handle
);
1275 fw3_ipt_rule_proto(r
, proto
);
1276 fw3_ipt_rule_in_out(r
, in
, out
);
1277 fw3_ipt_rule_src_dest(r
, src
, dest
);