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 static void fw3_init_extensions(void)
61 libip6t_REJECT_init();
65 libipt_MASQUERADE_init();
66 libipt_REDIRECT_init();
70 libxt_conntrack_init();
78 libxt_standard_init();
85 struct fw3_ipt_handle
*
86 fw3_ipt_open(enum fw3_family family
, enum fw3_table table
)
88 struct fw3_ipt_handle
*h
;
90 h
= fw3_alloc(sizeof(*h
));
94 if (family
== FW3_FAMILY_V6
)
96 h
->family
= FW3_FAMILY_V6
;
98 h
->handle
= ip6tc_init(fw3_flag_names
[table
]);
100 xtables_set_params(&xtg6
);
101 xtables_set_nfproto(NFPROTO_IPV6
);
105 h
->family
= FW3_FAMILY_V4
;
107 h
->handle
= iptc_init(fw3_flag_names
[table
]);
109 xtables_set_params(&xtg
);
110 xtables_set_nfproto(NFPROTO_IPV4
);
119 xtables_pending_matches
= NULL
;
120 xtables_pending_targets
= NULL
;
122 xtables_matches
= NULL
;
123 xtables_targets
= NULL
;
125 fw3_init_extensions();
131 debug(struct fw3_ipt_handle
*h
, const char *fmt
, ...)
135 printf("%s -t %s ", (h
->family
== FW3_FAMILY_V6
) ? "ip6tables" : "iptables",
136 fw3_flag_names
[h
->table
]);
144 fw3_ipt_set_policy(struct fw3_ipt_handle
*h
, const char *chain
,
145 enum fw3_flag policy
)
148 debug(h
, "-P %s %s\n", chain
, fw3_flag_names
[policy
]);
150 if (h
->family
== FW3_FAMILY_V6
)
151 ip6tc_set_policy(chain
, fw3_flag_names
[policy
], NULL
, h
->handle
);
153 iptc_set_policy(chain
, fw3_flag_names
[policy
], NULL
, h
->handle
);
157 fw3_ipt_delete_chain(struct fw3_ipt_handle
*h
, const char *chain
)
161 debug(h
, "-F %s\n", chain
);
162 debug(h
, "-X %s\n", chain
);
165 if (h
->family
== FW3_FAMILY_V6
)
167 if (ip6tc_flush_entries(chain
, h
->handle
))
168 ip6tc_delete_chain(chain
, h
->handle
);
172 if (iptc_flush_entries(chain
, h
->handle
))
173 iptc_delete_chain(chain
, h
->handle
);
178 fw3_ipt_delete_rules(struct fw3_ipt_handle
*h
, const char *target
)
181 const struct ipt_entry
*e
;
182 const struct ip6t_entry
*e6
;
187 if (h
->family
== FW3_FAMILY_V6
)
189 for (chain
= ip6tc_first_chain(h
->handle
);
191 chain
= ip6tc_next_chain(h
->handle
))
196 for (num
= 0, e6
= ip6tc_first_rule(chain
, h
->handle
);
198 num
++, e6
= ip6tc_next_rule(e6
, h
->handle
))
200 t
= ip6tc_get_target(e6
, h
->handle
);
202 if (*t
&& !strcmp(t
, target
))
205 debug(h
, "-D %s %u\n", chain
, num
+ 1);
207 ip6tc_delete_num_entry(chain
, num
, h
->handle
);
217 for (chain
= iptc_first_chain(h
->handle
);
219 chain
= iptc_next_chain(h
->handle
))
224 for (num
= 0, e
= iptc_first_rule(chain
, h
->handle
);
226 num
++, e
= iptc_next_rule(e
, h
->handle
))
228 t
= iptc_get_target(e
, h
->handle
);
230 if (*t
&& !strcmp(t
, target
))
233 debug(h
, "-D %s %u\n", chain
, num
+ 1);
235 iptc_delete_num_entry(chain
, num
, h
->handle
);
246 fw3_ipt_create_chain(struct fw3_ipt_handle
*h
, const char *fmt
, ...)
252 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
256 debug(h
, "-N %s\n", buf
);
258 iptc_create_chain(buf
, h
->handle
);
262 fw3_ipt_flush(struct fw3_ipt_handle
*h
)
266 if (h
->family
== FW3_FAMILY_V6
)
268 for (chain
= ip6tc_first_chain(h
->handle
);
270 chain
= ip6tc_next_chain(h
->handle
))
272 ip6tc_flush_entries(chain
, h
->handle
);
275 for (chain
= ip6tc_first_chain(h
->handle
);
277 chain
= ip6tc_next_chain(h
->handle
))
279 ip6tc_delete_chain(chain
, h
->handle
);
284 for (chain
= iptc_first_chain(h
->handle
);
286 chain
= iptc_next_chain(h
->handle
))
288 iptc_flush_entries(chain
, h
->handle
);
291 for (chain
= iptc_first_chain(h
->handle
);
293 chain
= iptc_next_chain(h
->handle
))
295 iptc_delete_chain(chain
, h
->handle
);
301 fw3_ipt_commit(struct fw3_ipt_handle
*h
)
305 if (h
->family
== FW3_FAMILY_V6
)
307 rv
= ip6tc_commit(h
->handle
);
309 fprintf(stderr
, "ip6tc_commit(): %s\n", ip6tc_strerror(errno
));
313 rv
= iptc_commit(h
->handle
);
315 fprintf(stderr
, "iptc_commit(): %s\n", iptc_strerror(errno
));
321 struct fw3_ipt_rule
*
322 fw3_ipt_rule_new(struct fw3_ipt_handle
*h
)
324 struct fw3_ipt_rule
*r
;
326 r
= fw3_alloc(sizeof(*r
));
329 r
->argv
= fw3_alloc(sizeof(char *));
330 r
->argv
[r
->argc
++] = "fw3";
337 is_chain(struct fw3_ipt_handle
*h
, const char *name
)
339 if (h
->family
== FW3_FAMILY_V6
)
340 return ip6tc_is_chain(name
, h
->handle
);
342 return iptc_is_chain(name
, h
->handle
);
346 get_protoname(struct fw3_ipt_rule
*r
)
348 const struct xtables_pprot
*pp
;
351 for (pp
= xtables_chain_protos
; pp
->name
; pp
++)
352 if (pp
->num
== r
->protocol
)
353 return (char *)pp
->name
;
358 static struct xtables_match
*
359 find_match(struct fw3_ipt_rule
*r
, const char *name
)
361 return xtables_find_match(name
, XTF_TRY_LOAD
, &r
->matches
);
365 init_match(struct fw3_ipt_rule
*r
, struct xtables_match
*m
, bool no_clone
)
368 struct xtables_globals
*g
;
373 s
= XT_ALIGN(sizeof(struct xt_entry_match
)) + m
->size
;
376 strcpy(m
->m
->u
.user
.name
, m
->real_name
? m
->real_name
: m
->name
);
377 m
->m
->u
.user
.revision
= m
->revision
;
378 m
->m
->u
.match_size
= s
;
380 /* free previous userspace data */
384 m
->udata
= fw3_alloc(m
->udata_size
);
390 /* don't merge options if no_clone is set and this match is a clone */
391 if (no_clone
&& (m
== m
->next
))
394 /* merge option table */
395 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
398 g
->opts
= xtables_options_xfrm(g
->orig_opts
, g
->opts
,
399 m
->x6_options
, &m
->option_offset
);
402 g
->opts
= xtables_merge_options(g
->orig_opts
, g
->opts
,
403 m
->extra_opts
, &m
->option_offset
);
407 need_protomatch(struct fw3_ipt_rule
*r
, const char *pname
)
412 if (!xtables_find_match(pname
, XTF_DONT_LOAD
, NULL
))
415 return !r
->protocol_loaded
;
418 static struct xtables_match
*
419 load_protomatch(struct fw3_ipt_rule
*r
)
421 const char *pname
= get_protoname(r
);
423 if (!need_protomatch(r
, pname
))
426 return find_match(r
, pname
);
429 static struct xtables_target
*
430 get_target(struct fw3_ipt_rule
*r
, const char *name
)
433 struct xtables_target
*t
;
434 struct xtables_globals
*g
;
436 bool chain
= is_chain(r
->h
, name
);
439 t
= xtables_find_target(XT_STANDARD_TARGET
, XTF_LOAD_MUST_SUCCEED
);
441 t
= xtables_find_target(name
, XTF_TRY_LOAD
);
446 s
= XT_ALIGN(sizeof(struct xt_entry_target
)) + t
->size
;
450 strcpy(t
->t
->u
.user
.name
, name
);
452 strcpy(t
->t
->u
.user
.name
, t
->real_name
);
454 t
->t
->u
.user
.revision
= t
->revision
;
455 t
->t
->u
.target_size
= s
;
460 t
->udata
= fw3_alloc(t
->udata_size
);
466 /* merge option table */
467 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
470 g
->opts
= xtables_options_xfrm(g
->orig_opts
, g
->opts
,
471 t
->x6_options
, &t
->option_offset
);
473 g
->opts
= xtables_merge_options(g
->orig_opts
, g
->opts
,
474 t
->extra_opts
, &t
->option_offset
);
482 fw3_ipt_rule_proto(struct fw3_ipt_rule
*r
, struct fw3_protocol
*proto
)
486 if (!proto
|| proto
->any
)
489 pr
= proto
->protocol
;
491 if (r
->h
->family
== FW3_FAMILY_V6
)
496 r
->e6
.ipv6
.proto
= pr
;
497 r
->e6
.ipv6
.flags
|= IP6T_F_PROTO
;
500 r
->e6
.ipv6
.invflags
|= XT_INV_PROTO
;
507 r
->e
.ip
.invflags
|= XT_INV_PROTO
;
514 fw3_ipt_rule_in_out(struct fw3_ipt_rule
*r
,
515 struct fw3_device
*in
, struct fw3_device
*out
)
517 if (r
->h
->family
== FW3_FAMILY_V6
)
521 xtables_parse_interface(in
->name
, r
->e6
.ipv6
.iniface
,
522 r
->e6
.ipv6
.iniface_mask
);
525 r
->e6
.ipv6
.invflags
|= IP6T_INV_VIA_IN
;
528 if (out
&& !out
->any
)
530 xtables_parse_interface(out
->name
, r
->e6
.ipv6
.outiface
,
531 r
->e6
.ipv6
.outiface_mask
);
534 r
->e6
.ipv6
.invflags
|= IP6T_INV_VIA_OUT
;
541 xtables_parse_interface(in
->name
, r
->e
.ip
.iniface
,
542 r
->e
.ip
.iniface_mask
);
545 r
->e
.ip
.invflags
|= IPT_INV_VIA_IN
;
548 if (out
&& !out
->any
)
550 xtables_parse_interface(out
->name
, r
->e
.ip
.outiface
,
551 r
->e
.ip
.outiface_mask
);
554 r
->e
.ip
.invflags
|= IPT_INV_VIA_OUT
;
561 ip4prefix2mask(int prefix
, struct in_addr
*mask
)
563 mask
->s_addr
= htonl(~((1 << (32 - prefix
)) - 1));
567 ip6prefix2mask(int prefix
, struct in6_addr
*mask
)
569 char *p
= (char *)mask
;
573 memset(p
, 0xff, prefix
/ 8);
574 memset(p
+ (prefix
/ 8) + 1, 0, (128 - prefix
) / 8);
575 p
[prefix
/ 8] = 0xff << (8 - (prefix
& 7));
579 memset(mask
, 0, sizeof(*mask
));
584 fw3_ipt_rule_src_dest(struct fw3_ipt_rule
*r
,
585 struct fw3_address
*src
, struct fw3_address
*dest
)
589 if ((src
&& src
->range
) || (dest
&& dest
->range
))
591 fw3_ipt_rule_addarg(r
, false, "-m", "iprange");
598 fw3_ipt_rule_addarg(r
, src
->invert
, "--src-range",
599 fw3_address_to_string(src
, false));
601 else if (r
->h
->family
== FW3_FAMILY_V6
)
603 r
->e6
.ipv6
.src
= src
->address
.v6
;
604 ip6prefix2mask(src
->mask
, &r
->e6
.ipv6
.smsk
);
606 for (i
= 0; i
< 4; i
++)
607 r
->e6
.ipv6
.src
.s6_addr32
[i
] &= r
->e6
.ipv6
.smsk
.s6_addr32
[i
];
610 r
->e6
.ipv6
.invflags
|= IP6T_INV_SRCIP
;
614 r
->e
.ip
.src
= src
->address
.v4
;
615 ip4prefix2mask(src
->mask
, &r
->e
.ip
.smsk
);
617 r
->e
.ip
.src
.s_addr
&= r
->e
.ip
.smsk
.s_addr
;
620 r
->e
.ip
.invflags
|= IPT_INV_SRCIP
;
624 if (dest
&& dest
->set
)
628 fw3_ipt_rule_addarg(r
, dest
->invert
, "--dst-range",
629 fw3_address_to_string(dest
, false));
631 else if (r
->h
->family
== FW3_FAMILY_V6
)
633 r
->e6
.ipv6
.dst
= dest
->address
.v6
;
634 ip6prefix2mask(dest
->mask
, &r
->e6
.ipv6
.dmsk
);
636 for (i
= 0; i
< 4; i
++)
637 r
->e6
.ipv6
.dst
.s6_addr32
[i
] &= r
->e6
.ipv6
.dmsk
.s6_addr32
[i
];
640 r
->e6
.ipv6
.invflags
|= IP6T_INV_DSTIP
;
644 r
->e
.ip
.dst
= dest
->address
.v4
;
645 ip4prefix2mask(dest
->mask
, &r
->e
.ip
.dmsk
);
647 r
->e
.ip
.dst
.s_addr
&= r
->e
.ip
.dmsk
.s_addr
;
650 r
->e
.ip
.invflags
|= IPT_INV_DSTIP
;
656 fw3_ipt_rule_sport_dport(struct fw3_ipt_rule
*r
,
657 struct fw3_port
*sp
, struct fw3_port
*dp
)
659 char buf
[sizeof("65535:65535\0")];
661 if ((!sp
|| !sp
->set
) && (!dp
|| !dp
->set
))
664 if (!get_protoname(r
))
669 if (sp
->port_min
== sp
->port_max
)
670 sprintf(buf
, "%u", sp
->port_min
);
672 sprintf(buf
, "%u:%u", sp
->port_min
, sp
->port_max
);
674 fw3_ipt_rule_addarg(r
, sp
->invert
, "--sport", buf
);
679 if (dp
->port_min
== dp
->port_max
)
680 sprintf(buf
, "%u", dp
->port_min
);
682 sprintf(buf
, "%u:%u", dp
->port_min
, dp
->port_max
);
684 fw3_ipt_rule_addarg(r
, dp
->invert
, "--dport", buf
);
689 fw3_ipt_rule_mac(struct fw3_ipt_rule
*r
, struct fw3_mac
*mac
)
694 fw3_ipt_rule_addarg(r
, false, "-m", "mac");
695 fw3_ipt_rule_addarg(r
, mac
->invert
, "--mac-source", ether_ntoa(&mac
->mac
));
699 fw3_ipt_rule_icmptype(struct fw3_ipt_rule
*r
, struct fw3_icmptype
*icmp
)
701 char buf
[sizeof("255/255\0")];
706 if (r
->h
->family
== FW3_FAMILY_V6
)
708 if (icmp
->code6_min
== 0 && icmp
->code6_max
== 0xFF)
709 sprintf(buf
, "%u", icmp
->type6
);
711 sprintf(buf
, "%u/%u", icmp
->type6
, icmp
->code6_min
);
713 fw3_ipt_rule_addarg(r
, icmp
->invert
, "--icmpv6-type", buf
);
717 if (icmp
->code_min
== 0 && icmp
->code_max
== 0xFF)
718 sprintf(buf
, "%u", icmp
->type
);
720 sprintf(buf
, "%u/%u", icmp
->type
, icmp
->code_min
);
722 fw3_ipt_rule_addarg(r
, icmp
->invert
, "--icmp-type", buf
);
727 fw3_ipt_rule_limit(struct fw3_ipt_rule
*r
, struct fw3_limit
*limit
)
729 char buf
[sizeof("-4294967296/second\0")];
731 if (!limit
|| limit
->rate
<= 0)
734 fw3_ipt_rule_addarg(r
, false, "-m", "limit");
736 sprintf(buf
, "%u/%s", limit
->rate
, fw3_limit_units
[limit
->unit
]);
737 fw3_ipt_rule_addarg(r
, limit
->invert
, "--limit", buf
);
739 if (limit
->burst
> 0)
741 sprintf(buf
, "%u", limit
->burst
);
742 fw3_ipt_rule_addarg(r
, limit
->invert
, "--limit-burst", buf
);
747 fw3_ipt_rule_ipset(struct fw3_ipt_rule
*r
, struct fw3_ipset
*ipset
,
750 char buf
[sizeof("dst,dst,dst\0")];
753 struct fw3_ipset_datatype
*type
;
758 list_for_each_entry(type
, &ipset
->datatypes
, list
)
763 p
+= sprintf(p
, "%s", type
->dest
? "dst" : "src");
766 fw3_ipt_rule_addarg(r
, false, "-m", "set");
768 fw3_ipt_rule_addarg(r
, invert
, "--match-set",
769 ipset
->external
? ipset
->external
: ipset
->name
);
771 fw3_ipt_rule_addarg(r
, false, buf
, NULL
);
775 fw3_ipt_rule_time(struct fw3_ipt_rule
*r
, struct fw3_time
*time
)
778 struct tm empty
= { 0 };
780 char buf
[84]; /* sizeof("1,2,3,...,30,31\0") */
783 bool d1
= memcmp(&time
->datestart
, &empty
, sizeof(empty
));
784 bool d2
= memcmp(&time
->datestop
, &empty
, sizeof(empty
));
786 if (!d1
&& !d2
&& !time
->timestart
&& !time
->timestop
&&
787 !(time
->monthdays
& 0xFFFFFFFE) && !(time
->weekdays
& 0xFE))
792 fw3_ipt_rule_addarg(r
, false, "-m", "time");
795 fw3_ipt_rule_addarg(r
, false, "--utc", NULL
);
799 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestart
);
800 fw3_ipt_rule_addarg(r
, false, "--datestart", buf
);
805 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestop
);
806 fw3_ipt_rule_addarg(r
, false, "--datestop", buf
);
811 sprintf(buf
, "%02d:%02d:%02d",
812 time
->timestart
/ 3600,
813 time
->timestart
% 3600 / 60,
814 time
->timestart
% 60);
816 fw3_ipt_rule_addarg(r
, false, "--timestart", buf
);
821 sprintf(buf
, "%02d:%02d:%02d",
822 time
->timestop
/ 3600,
823 time
->timestop
% 3600 / 60,
824 time
->timestop
% 60);
826 fw3_ipt_rule_addarg(r
, false, "--timestop", buf
);
829 if (time
->monthdays
& 0xFFFFFFFE)
831 for (i
= 1, p
= buf
; i
< 32; i
++)
833 if (hasbit(time
->monthdays
, i
))
838 p
+= sprintf(p
, "%u", i
);
842 fw3_ipt_rule_addarg(r
, hasbit(time
->monthdays
, 0), "--monthdays", buf
);
845 if (time
->weekdays
& 0xFE)
847 for (i
= 1, p
= buf
; i
< 8; i
++)
849 if (hasbit(time
->weekdays
, i
))
854 p
+= sprintf(p
, "%u", i
);
858 fw3_ipt_rule_addarg(r
, hasbit(time
->weekdays
, 0), "--weekdays", buf
);
863 fw3_ipt_rule_mark(struct fw3_ipt_rule
*r
, struct fw3_mark
*mark
)
865 char buf
[sizeof("0xFFFFFFFF/0xFFFFFFFF\0")];
867 if (!mark
|| !mark
->set
)
870 if (mark
->mask
< 0xFFFFFFFF)
871 sprintf(buf
, "0x%x/0x%x", mark
->mark
, mark
->mask
);
873 sprintf(buf
, "0x%x", mark
->mark
);
875 fw3_ipt_rule_addarg(r
, false, "-m", "mark");
876 fw3_ipt_rule_addarg(r
, mark
->invert
, "--mark", buf
);
880 fw3_ipt_rule_comment(struct fw3_ipt_rule
*r
, const char *fmt
, ...)
889 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
892 fw3_ipt_rule_addarg(r
, false, "-m", "comment");
893 fw3_ipt_rule_addarg(r
, false, "--comment", buf
);
897 fw3_ipt_rule_extra(struct fw3_ipt_rule
*r
, const char *extra
)
901 if (!extra
|| !*extra
)
904 s
= fw3_strdup(extra
);
906 for (p
= strtok(s
, " \t"); p
; p
= strtok(NULL
, " \t"))
908 tmp
= realloc(r
->argv
, (r
->argc
+ 1) * sizeof(*r
->argv
));
914 r
->argv
[r
->argc
++] = fw3_strdup(p
);
921 rule_print6(struct ip6t_entry
*e
)
923 char buf
[INET6_ADDRSTRLEN
];
926 if (e
->ipv6
.flags
& IP6T_F_PROTO
)
928 if (e
->ipv6
.flags
& XT_INV_PROTO
)
931 pname
= get_protoname(container_of(e
, struct fw3_ipt_rule
, e6
));
934 printf(" -p %s", pname
);
936 printf(" -p %u", e
->ipv6
.proto
);
939 if (e
->ipv6
.iniface
[0])
941 if (e
->ipv6
.flags
& IP6T_INV_VIA_IN
)
944 printf(" -i %s", e
->ipv6
.iniface
);
947 if (e
->ipv6
.outiface
[0])
949 if (e
->ipv6
.flags
& IP6T_INV_VIA_OUT
)
952 printf(" -o %s", e
->ipv6
.outiface
);
955 if (memcmp(&e
->ipv6
.src
, &in6addr_any
, sizeof(struct in6_addr
)))
957 if (e
->ipv6
.flags
& IP6T_INV_SRCIP
)
960 printf(" -s %s/%u", inet_ntop(AF_INET6
, &e
->ipv6
.src
, buf
, sizeof(buf
)),
961 xtables_ip6mask_to_cidr(&e
->ipv6
.smsk
));
964 if (memcmp(&e
->ipv6
.dst
, &in6addr_any
, sizeof(struct in6_addr
)))
966 if (e
->ipv6
.flags
& IP6T_INV_DSTIP
)
969 printf(" -d %s/%u", inet_ntop(AF_INET6
, &e
->ipv6
.dst
, buf
, sizeof(buf
)),
970 xtables_ip6mask_to_cidr(&e
->ipv6
.dmsk
));
975 rule_print4(struct ipt_entry
*e
)
977 struct in_addr in_zero
= { 0 };
978 char buf
[sizeof("255.255.255.255\0")];
983 if (e
->ip
.flags
& XT_INV_PROTO
)
986 pname
= get_protoname(container_of(e
, struct fw3_ipt_rule
, e
));
989 printf(" -p %s", pname
);
991 printf(" -p %u", e
->ip
.proto
);
994 if (e
->ip
.iniface
[0])
996 if (e
->ip
.flags
& IPT_INV_VIA_IN
)
999 printf(" -i %s", e
->ip
.iniface
);
1002 if (e
->ip
.outiface
[0])
1004 if (e
->ip
.flags
& IPT_INV_VIA_OUT
)
1007 printf(" -o %s", e
->ip
.outiface
);
1010 if (memcmp(&e
->ip
.src
, &in_zero
, sizeof(struct in_addr
)))
1012 if (e
->ip
.flags
& IPT_INV_SRCIP
)
1015 printf(" -s %s/%u", inet_ntop(AF_INET
, &e
->ip
.src
, buf
, sizeof(buf
)),
1016 xtables_ipmask_to_cidr(&e
->ip
.smsk
));
1019 if (memcmp(&e
->ip
.dst
, &in_zero
, sizeof(struct in_addr
)))
1021 if (e
->ip
.flags
& IPT_INV_DSTIP
)
1024 printf(" -d %s/%u", inet_ntop(AF_INET
, &e
->ip
.dst
, buf
, sizeof(buf
)),
1025 xtables_ipmask_to_cidr(&e
->ip
.dmsk
));
1030 rule_print(struct fw3_ipt_rule
*r
, const char *chain
)
1032 struct xtables_rule_match
*rm
;
1033 struct xtables_match
*m
;
1034 struct xtables_target
*t
;
1036 debug(r
->h
, "-A %s", chain
);
1038 if (r
->h
->family
== FW3_FAMILY_V6
)
1039 rule_print6(&r
->e6
);
1043 for (rm
= r
->matches
; rm
; rm
= rm
->next
)
1046 printf(" -m %s", m
->alias
? m
->alias(m
->m
) : m
->m
->u
.user
.name
);
1049 m
->save(&r
->e
.ip
, m
->m
);
1055 printf(" -j %s", t
->alias
? t
->alias(t
->t
) : t
->t
->u
.user
.name
);
1058 t
->save(&r
->e
.ip
, t
->t
);
1065 parse_option(struct fw3_ipt_rule
*r
, int optc
, bool inv
)
1067 struct xtables_rule_match
*m
;
1068 struct xtables_match
*em
;
1070 /* is a target option */
1071 if (r
->target
&& (r
->target
->parse
|| r
->target
->x6_parse
) &&
1072 optc
>= r
->target
->option_offset
&&
1073 optc
< (r
->target
->option_offset
+ 256))
1075 xtables_option_tpcall(optc
, r
->argv
, inv
, r
->target
, &r
->e
);
1079 /* try to dispatch argument to one of the match parsers */
1080 for (m
= r
->matches
; m
; m
= m
->next
)
1084 if (m
->completed
|| (!em
->parse
&& !em
->x6_parse
))
1087 if (optc
< em
->option_offset
||
1088 optc
>= (em
->option_offset
+ 256))
1091 xtables_option_mpcall(optc
, r
->argv
, inv
, em
, &r
->e
);
1095 /* unhandled option, might belong to a protocol match */
1096 if ((em
= load_protomatch(r
)) != NULL
)
1098 init_match(r
, em
, false);
1100 r
->protocol_loaded
= true;
1107 fprintf(stderr
, "parse_option(): option '%s' needs argument\n",
1111 fprintf(stderr
, "parse_option(): unknown option '%s'\n",
1118 fw3_ipt_rule_addarg(struct fw3_ipt_rule
*r
, bool inv
,
1119 const char *k
, const char *v
)
1127 n
= inv
+ !!k
+ !!v
;
1128 tmp
= realloc(r
->argv
, (r
->argc
+ n
) * sizeof(*tmp
));
1136 r
->argv
[r
->argc
++] = fw3_strdup("!");
1138 r
->argv
[r
->argc
++] = fw3_strdup(k
);
1141 r
->argv
[r
->argc
++] = fw3_strdup(v
);
1145 fw3_ipt_rule_append(struct fw3_ipt_rule
*r
, const char *fmt
, ...)
1148 struct xtables_rule_match
*m
;
1149 struct xtables_match
*em
;
1150 struct xtables_target
*et
;
1151 struct xtables_globals
*g
;
1152 struct ipt_entry
*e
;
1153 struct ip6t_entry
*e6
;
1161 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
1164 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
1165 g
->opts
= g
->orig_opts
;
1170 while ((optc
= getopt_long(r
->argc
, r
->argv
, "m:j:", g
->opts
, NULL
)) != -1)
1175 em
= find_match(r
, optarg
);
1179 fprintf(stderr
, "fw3_ipt_rule_append(): Can't find match '%s'\n", optarg
);
1183 init_match(r
, em
, true);
1187 et
= get_target(r
, optarg
);
1191 fprintf(stderr
, "fw3_ipt_rule_append(): Can't find target '%s'\n", optarg
);
1198 if ((optarg
[0] == '!') && (optarg
[1] == '\0'))
1204 fprintf(stderr
, "fw3_ipt_rule_append(): Bad argument '%s'\n", optarg
);
1208 if (parse_option(r
, optc
, inv
))
1216 for (m
= r
->matches
; m
; m
= m
->next
)
1217 xtables_option_mfcall(m
->match
);
1220 xtables_option_tfcall(r
->target
);
1225 if (r
->h
->family
== FW3_FAMILY_V6
)
1227 s
= XT_ALIGN(sizeof(struct ip6t_entry
));
1229 for (m
= r
->matches
; m
; m
= m
->next
)
1230 s
+= m
->match
->m
->u
.match_size
;
1232 e6
= fw3_alloc(s
+ r
->target
->t
->u
.target_size
);
1234 memcpy(e6
, &r
->e6
, sizeof(struct ip6t_entry
));
1236 e6
->target_offset
= s
;
1237 e6
->next_offset
= s
+ r
->target
->t
->u
.target_size
;
1241 for (m
= r
->matches
; m
; m
= m
->next
)
1243 memcpy(e6
->elems
+ s
, m
->match
->m
, m
->match
->m
->u
.match_size
);
1244 s
+= m
->match
->m
->u
.match_size
;
1247 memcpy(e6
->elems
+ s
, r
->target
->t
, r
->target
->t
->u
.target_size
);
1248 ip6tc_append_entry(buf
, e6
, r
->h
->handle
);
1253 s
= XT_ALIGN(sizeof(struct ipt_entry
));
1255 for (m
= r
->matches
; m
; m
= m
->next
)
1256 s
+= m
->match
->m
->u
.match_size
;
1258 e
= fw3_alloc(s
+ r
->target
->t
->u
.target_size
);
1260 memcpy(e
, &r
->e
, sizeof(struct ipt_entry
));
1262 e
->target_offset
= s
;
1263 e
->next_offset
= s
+ r
->target
->t
->u
.target_size
;
1267 for (m
= r
->matches
; m
; m
= m
->next
)
1269 memcpy(e
->elems
+ s
, m
->match
->m
, m
->match
->m
->u
.match_size
);
1270 s
+= m
->match
->m
->u
.match_size
;
1273 memcpy(e
->elems
+ s
, r
->target
->t
, r
->target
->t
->u
.target_size
);
1275 if (!iptc_append_entry(buf
, e
, r
->h
->handle
))
1276 fprintf(stderr
, "iptc_append_entry(): %s\n", iptc_strerror(errno
));
1281 for (i
= 1; i
< r
->argc
; i
++)
1286 xtables_rule_matches_free(&r
->matches
);
1291 /* reset all targets and matches */
1292 for (em
= xtables_matches
; em
; em
= em
->next
)
1295 for (et
= xtables_targets
; et
; et
= et
->next
)
1301 xtables_free_opts(1);
1304 struct fw3_ipt_rule
*
1305 fw3_ipt_rule_create(struct fw3_ipt_handle
*handle
, struct fw3_protocol
*proto
,
1306 struct fw3_device
*in
, struct fw3_device
*out
,
1307 struct fw3_address
*src
, struct fw3_address
*dest
)
1309 struct fw3_ipt_rule
*r
;
1311 r
= fw3_ipt_rule_new(handle
);
1313 fw3_ipt_rule_proto(r
, proto
);
1314 fw3_ipt_rule_in_out(r
, in
, out
);
1315 fw3_ipt_rule_src_dest(r
, src
, dest
);