2 * firewall3 - 3rd OpenWrt UCI firewall implementation
4 * Copyright (C) 2013 Jo-Philipp Wich <jo@mein.io>
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' },
28 static struct xtables_globals xtg
= {
30 .program_version
= "4",
31 .orig_opts
= base_opts
,
34 static struct xtables_globals xtg6
= {
36 .program_version
= "6",
37 .orig_opts
= base_opts
,
43 struct xtables_match
**matches
;
44 struct xtables_target
**targets
;
45 void (*register_match
)(struct xtables_match
*);
46 void (*register_target
)(struct xtables_target
*);
50 /* Required by certain extensions like SNAT and DNAT */
51 int kernel_version
= 0;
54 get_kernel_version(void)
56 static struct utsname uts
;
57 int x
= 0, y
= 0, z
= 0;
59 if (uname(&uts
) == -1)
60 sprintf(uts
.release
, "3.0.0");
62 sscanf(uts
.release
, "%d.%d.%d", &x
, &y
, &z
);
63 kernel_version
= 0x10000 * x
+ 0x100 * y
+ z
;
66 static void fw3_init_extensions(void)
76 struct fw3_ipt_handle
*
77 fw3_ipt_open(enum fw3_family family
, enum fw3_table table
)
80 struct fw3_ipt_handle
*h
;
82 h
= fw3_alloc(sizeof(*h
));
86 if (family
== FW3_FAMILY_V6
)
89 h
->family
= FW3_FAMILY_V6
;
91 h
->handle
= ip6tc_init(fw3_flag_names
[table
]);
93 xtables_set_params(&xtg6
);
94 xtables_set_nfproto(NFPROTO_IPV6
);
99 h
->family
= FW3_FAMILY_V4
;
101 h
->handle
= iptc_init(fw3_flag_names
[table
]);
103 xtables_set_params(&xtg
);
104 xtables_set_nfproto(NFPROTO_IPV4
);
114 fw3_init_extensions();
116 if (xext
.register_match
)
117 for (i
= 0; i
< xext
.mcount
; i
++)
118 xext
.register_match(xext
.matches
[i
]);
120 if (xext
.register_target
)
121 for (i
= 0; i
< xext
.tcount
; i
++)
122 xext
.register_target(xext
.targets
[i
]);
128 debug(struct fw3_ipt_handle
*h
, const char *fmt
, ...)
132 printf("%s -t %s ", (h
->family
== FW3_FAMILY_V6
) ? "ip6tables" : "iptables",
133 fw3_flag_names
[h
->table
]);
141 fw3_ipt_set_policy(struct fw3_ipt_handle
*h
, const char *chain
,
142 enum fw3_flag policy
)
145 debug(h
, "-P %s %s\n", chain
, fw3_flag_names
[policy
]);
148 if (h
->family
== FW3_FAMILY_V6
)
149 ip6tc_set_policy(chain
, fw3_flag_names
[policy
], NULL
, h
->handle
);
152 iptc_set_policy(chain
, fw3_flag_names
[policy
], NULL
, h
->handle
);
156 fw3_ipt_flush_chain(struct fw3_ipt_handle
*h
, const char *chain
)
159 debug(h
, "-F %s\n", chain
);
162 if (h
->family
== FW3_FAMILY_V6
)
163 ip6tc_flush_entries(chain
, h
->handle
);
166 iptc_flush_entries(chain
, h
->handle
);
170 delete_rules(struct fw3_ipt_handle
*h
, const char *target
)
173 const struct ipt_entry
*e
;
179 if (h
->family
== FW3_FAMILY_V6
)
181 for (chain
= ip6tc_first_chain(h
->handle
);
183 chain
= ip6tc_next_chain(h
->handle
))
188 const struct ip6t_entry
*e6
;
189 for (num
= 0, e6
= ip6tc_first_rule(chain
, h
->handle
);
191 num
++, e6
= ip6tc_next_rule(e6
, h
->handle
))
193 t
= ip6tc_get_target(e6
, h
->handle
);
195 if (*t
&& !strcmp(t
, target
))
198 debug(h
, "-D %s %u\n", chain
, num
+ 1);
200 ip6tc_delete_num_entry(chain
, num
, h
->handle
);
211 for (chain
= iptc_first_chain(h
->handle
);
213 chain
= iptc_next_chain(h
->handle
))
218 for (num
= 0, e
= iptc_first_rule(chain
, h
->handle
);
220 num
++, e
= iptc_next_rule(e
, h
->handle
))
222 t
= iptc_get_target(e
, h
->handle
);
224 if (*t
&& !strcmp(t
, target
))
227 debug(h
, "-D %s %u\n", chain
, num
+ 1);
229 iptc_delete_num_entry(chain
, num
, h
->handle
);
240 fw3_ipt_delete_chain(struct fw3_ipt_handle
*h
, const char *chain
)
242 delete_rules(h
, chain
);
245 debug(h
, "-X %s\n", chain
);
248 if (h
->family
== FW3_FAMILY_V6
)
249 ip6tc_delete_chain(chain
, h
->handle
);
252 iptc_delete_chain(chain
, h
->handle
);
256 get_rule_id(const void *base
, unsigned int start
, unsigned int end
)
260 const struct xt_entry_match
*em
;
262 for (i
= start
; i
< end
; i
+= em
->u
.match_size
)
266 if (strcmp(em
->u
.user
.name
, "id"))
269 memcpy(&id
, em
->data
, sizeof(id
));
271 if ((id
& FW3_ID_MASK
) != FW3_ID_MAGIC
)
274 return (id
& ~FW3_ID_MASK
);
281 fw3_ipt_delete_id_rules(struct fw3_ipt_handle
*h
, const char *chain
)
284 const struct ipt_entry
*e
;
289 if (h
->family
== FW3_FAMILY_V6
)
291 if (!ip6tc_is_chain(chain
, h
->handle
))
297 const struct ip6t_entry
*e6
;
298 for (num
= 0, e6
= ip6tc_first_rule(chain
, h
->handle
);
300 num
++, e6
= ip6tc_next_rule(e6
, h
->handle
))
302 id
= get_rule_id(e6
, sizeof(*e6
), e6
->target_offset
);
307 debug(h
, "-D %s %u\n", chain
, num
+ 1);
309 ip6tc_delete_num_entry(chain
, num
, h
->handle
);
319 if (!iptc_is_chain(chain
, h
->handle
))
325 for (num
= 0, e
= iptc_first_rule(chain
, h
->handle
);
327 num
++, e
= iptc_next_rule(e
, h
->handle
))
329 id
= get_rule_id(e
, sizeof(*e
), e
->target_offset
);
334 debug(h
, "-D %s %u\n", chain
, num
+ 1);
336 iptc_delete_num_entry(chain
, num
, h
->handle
);
346 fw3_ipt_create_chain(struct fw3_ipt_handle
*h
, const char *fmt
, ...)
352 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
356 debug(h
, "-N %s\n", buf
);
358 iptc_create_chain(buf
, h
->handle
);
362 fw3_ipt_flush(struct fw3_ipt_handle
*h
)
367 if (h
->family
== FW3_FAMILY_V6
)
369 for (chain
= ip6tc_first_chain(h
->handle
);
371 chain
= ip6tc_next_chain(h
->handle
))
373 ip6tc_flush_entries(chain
, h
->handle
);
376 for (chain
= ip6tc_first_chain(h
->handle
);
378 chain
= ip6tc_next_chain(h
->handle
))
380 ip6tc_delete_chain(chain
, h
->handle
);
386 for (chain
= iptc_first_chain(h
->handle
);
388 chain
= iptc_next_chain(h
->handle
))
390 iptc_flush_entries(chain
, h
->handle
);
393 for (chain
= iptc_first_chain(h
->handle
);
395 chain
= iptc_next_chain(h
->handle
))
397 iptc_delete_chain(chain
, h
->handle
);
403 chain_is_empty(struct fw3_ipt_handle
*h
, const char *chain
)
406 if (h
->family
== FW3_FAMILY_V6
)
407 return (!ip6tc_builtin(chain
, h
->handle
) &&
408 !ip6tc_first_rule(chain
, h
->handle
));
411 return (!iptc_builtin(chain
, h
->handle
) &&
412 !iptc_first_rule(chain
, h
->handle
));
416 fw3_ipt_gc(struct fw3_ipt_handle
*h
)
422 if (h
->family
== FW3_FAMILY_V6
)
427 for (chain
= ip6tc_first_chain(h
->handle
);
429 chain
= ip6tc_next_chain(h
->handle
))
431 if (!chain_is_empty(h
, chain
))
434 fw3_ipt_delete_chain(h
, chain
);
446 for (chain
= iptc_first_chain(h
->handle
);
448 chain
= iptc_next_chain(h
->handle
))
450 warn("C=%s\n", chain
);
452 if (!chain_is_empty(h
, chain
))
455 warn("D=%s\n", chain
);
457 fw3_ipt_delete_chain(h
, chain
);
466 fw3_ipt_commit(struct fw3_ipt_handle
*h
)
471 if (h
->family
== FW3_FAMILY_V6
)
473 rv
= ip6tc_commit(h
->handle
);
475 warn("ip6tc_commit(): %s", ip6tc_strerror(errno
));
480 rv
= iptc_commit(h
->handle
);
482 warn("iptc_commit(): %s", iptc_strerror(errno
));
487 fw3_ipt_close(struct fw3_ipt_handle
*h
)
492 struct fw3_ipt_rule
*
493 fw3_ipt_rule_new(struct fw3_ipt_handle
*h
)
495 struct fw3_ipt_rule
*r
;
497 r
= fw3_alloc(sizeof(*r
));
501 r
->argv
= fw3_alloc(sizeof(char *));
502 r
->argv
[r
->argc
++] = "fw3";
509 is_chain(struct fw3_ipt_handle
*h
, const char *name
)
512 if (h
->family
== FW3_FAMILY_V6
)
513 return ip6tc_is_chain(name
, h
->handle
);
516 return iptc_is_chain(name
, h
->handle
);
520 get_protoname(struct fw3_ipt_rule
*r
)
522 const struct xtables_pprot
*pp
;
525 for (pp
= xtables_chain_protos
; pp
->name
; pp
++)
526 if (pp
->num
== r
->protocol
)
527 return (char *)pp
->name
;
533 load_extension(struct fw3_ipt_handle
*h
, const char *name
)
537 const char *pfx
= (h
->family
== FW3_FAMILY_V6
) ? "libip6t" : "libipt";
541 snprintf(path
, sizeof(path
), "/usr/lib/iptables/libxt_%s.so", name
);
542 if (!(lib
= dlopen(path
, RTLD_NOW
)))
544 snprintf(path
, sizeof(path
), "/usr/lib/iptables/%s_%s.so", pfx
, name
);
545 lib
= dlopen(path
, RTLD_NOW
);
553 static struct xtables_match
*
554 find_match(struct fw3_ipt_rule
*r
, const char *name
)
556 struct xtables_match
*m
;
558 m
= xtables_find_match(name
, XTF_DONT_LOAD
, &r
->matches
);
560 if (!m
&& load_extension(r
->h
, name
))
561 m
= xtables_find_match(name
, XTF_DONT_LOAD
, &r
->matches
);
567 init_match(struct fw3_ipt_rule
*r
, struct xtables_match
*m
, bool no_clone
)
570 struct xtables_globals
*g
;
575 s
= XT_ALIGN(sizeof(struct xt_entry_match
)) + m
->size
;
579 fw3_xt_set_match_name(m
);
581 m
->m
->u
.user
.revision
= m
->revision
;
582 m
->m
->u
.match_size
= s
;
584 /* free previous userspace data */
585 fw3_xt_free_match_udata(m
);
590 /* don't merge options if no_clone is set and this match is a clone */
591 if (no_clone
&& (m
== m
->next
))
594 /* merge option table */
595 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
596 fw3_xt_merge_match_options(g
, m
);
600 need_protomatch(struct fw3_ipt_rule
*r
, const char *pname
)
605 if (!xtables_find_match(pname
, XTF_DONT_LOAD
, NULL
))
608 return !r
->protocol_loaded
;
611 static struct xtables_match
*
612 load_protomatch(struct fw3_ipt_rule
*r
)
614 const char *pname
= get_protoname(r
);
616 if (!need_protomatch(r
, pname
))
619 return find_match(r
, pname
);
622 static struct xtables_target
*
623 find_target(struct fw3_ipt_rule
*r
, const char *name
)
625 struct xtables_target
*t
;
627 if (is_chain(r
->h
, name
))
628 return xtables_find_target(XT_STANDARD_TARGET
, XTF_LOAD_MUST_SUCCEED
);
630 t
= xtables_find_target(name
, XTF_DONT_LOAD
);
632 if (!t
&& load_extension(r
->h
, name
))
633 t
= xtables_find_target(name
, XTF_DONT_LOAD
);
638 static struct xtables_target
*
639 get_target(struct fw3_ipt_rule
*r
, const char *name
)
642 struct xtables_target
*t
;
643 struct xtables_globals
*g
;
645 t
= find_target(r
, name
);
650 s
= XT_ALIGN(sizeof(struct xt_entry_target
)) + t
->size
;
653 fw3_xt_set_target_name(t
, name
);
655 t
->t
->u
.user
.revision
= t
->revision
;
656 t
->t
->u
.target_size
= s
;
658 /* free previous userspace data */
659 fw3_xt_free_target_udata(t
);
664 /* merge option table */
665 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
666 fw3_xt_merge_target_options(g
, t
);
674 fw3_ipt_rule_proto(struct fw3_ipt_rule
*r
, struct fw3_protocol
*proto
)
678 if (!proto
|| proto
->any
)
681 pr
= proto
->protocol
;
684 if (r
->h
->family
== FW3_FAMILY_V6
)
689 r
->e6
.ipv6
.proto
= pr
;
690 r
->e6
.ipv6
.flags
|= IP6T_F_PROTO
;
693 r
->e6
.ipv6
.invflags
|= XT_INV_PROTO
;
701 r
->e
.ip
.invflags
|= XT_INV_PROTO
;
708 fw3_ipt_rule_in_out(struct fw3_ipt_rule
*r
,
709 struct fw3_device
*in
, struct fw3_device
*out
)
712 if (r
->h
->family
== FW3_FAMILY_V6
)
716 xtables_parse_interface(in
->name
, r
->e6
.ipv6
.iniface
,
717 r
->e6
.ipv6
.iniface_mask
);
720 r
->e6
.ipv6
.invflags
|= IP6T_INV_VIA_IN
;
723 if (out
&& !out
->any
)
725 xtables_parse_interface(out
->name
, r
->e6
.ipv6
.outiface
,
726 r
->e6
.ipv6
.outiface_mask
);
729 r
->e6
.ipv6
.invflags
|= IP6T_INV_VIA_OUT
;
737 xtables_parse_interface(in
->name
, r
->e
.ip
.iniface
,
738 r
->e
.ip
.iniface_mask
);
741 r
->e
.ip
.invflags
|= IPT_INV_VIA_IN
;
744 if (out
&& !out
->any
)
746 xtables_parse_interface(out
->name
, r
->e
.ip
.outiface
,
747 r
->e
.ip
.outiface_mask
);
750 r
->e
.ip
.invflags
|= IPT_INV_VIA_OUT
;
757 fw3_ipt_rule_src_dest(struct fw3_ipt_rule
*r
,
758 struct fw3_address
*src
, struct fw3_address
*dest
)
760 if ((src
&& src
->range
) || (dest
&& dest
->range
))
762 fw3_ipt_rule_addarg(r
, false, "-m", "iprange");
769 fw3_ipt_rule_addarg(r
, src
->invert
, "--src-range",
770 fw3_address_to_string(src
, false, false));
773 else if (r
->h
->family
== FW3_FAMILY_V6
)
775 r
->e6
.ipv6
.src
= src
->address
.v6
;
776 r
->e6
.ipv6
.smsk
= src
->mask
.v6
;
779 for (i
= 0; i
< 4; i
++)
780 r
->e6
.ipv6
.src
.s6_addr32
[i
] &= r
->e6
.ipv6
.smsk
.s6_addr32
[i
];
783 r
->e6
.ipv6
.invflags
|= IP6T_INV_SRCIP
;
788 r
->e
.ip
.src
= src
->address
.v4
;
789 r
->e
.ip
.smsk
= src
->mask
.v4
;
791 r
->e
.ip
.src
.s_addr
&= r
->e
.ip
.smsk
.s_addr
;
794 r
->e
.ip
.invflags
|= IPT_INV_SRCIP
;
798 if (dest
&& dest
->set
)
802 fw3_ipt_rule_addarg(r
, dest
->invert
, "--dst-range",
803 fw3_address_to_string(dest
, false, false));
806 else if (r
->h
->family
== FW3_FAMILY_V6
)
808 r
->e6
.ipv6
.dst
= dest
->address
.v6
;
809 r
->e6
.ipv6
.dmsk
= dest
->mask
.v6
;
812 for (i
= 0; i
< 4; i
++)
813 r
->e6
.ipv6
.dst
.s6_addr32
[i
] &= r
->e6
.ipv6
.dmsk
.s6_addr32
[i
];
816 r
->e6
.ipv6
.invflags
|= IP6T_INV_DSTIP
;
821 r
->e
.ip
.dst
= dest
->address
.v4
;
822 r
->e
.ip
.dmsk
= dest
->mask
.v4
;
824 r
->e
.ip
.dst
.s_addr
&= r
->e
.ip
.dmsk
.s_addr
;
827 r
->e
.ip
.invflags
|= IPT_INV_DSTIP
;
833 fw3_ipt_rule_sport_dport(struct fw3_ipt_rule
*r
,
834 struct fw3_port
*sp
, struct fw3_port
*dp
)
836 char buf
[sizeof("65535:65535\0")];
838 if ((!sp
|| !sp
->set
) && (!dp
|| !dp
->set
))
841 if (!get_protoname(r
))
846 if (sp
->port_min
== sp
->port_max
)
847 sprintf(buf
, "%u", sp
->port_min
);
849 sprintf(buf
, "%u:%u", sp
->port_min
, sp
->port_max
);
851 fw3_ipt_rule_addarg(r
, sp
->invert
, "--sport", buf
);
856 if (dp
->port_min
== dp
->port_max
)
857 sprintf(buf
, "%u", dp
->port_min
);
859 sprintf(buf
, "%u:%u", dp
->port_min
, dp
->port_max
);
861 fw3_ipt_rule_addarg(r
, dp
->invert
, "--dport", buf
);
866 fw3_ipt_rule_device(struct fw3_ipt_rule
*r
, const char *device
, bool out
)
869 struct fw3_device dev
= { .any
= false };
870 strncpy(dev
.name
, device
, sizeof(dev
.name
) - 1);
871 fw3_ipt_rule_in_out(r
, (out
) ? NULL
: &dev
, (out
) ? &dev
: NULL
);
876 fw3_ipt_rule_mac(struct fw3_ipt_rule
*r
, struct fw3_mac
*mac
)
878 char buf
[sizeof("ff:ff:ff:ff:ff:ff\0")];
879 uint8_t *addr
= mac
->mac
.ether_addr_octet
;
884 sprintf(buf
, "%02x:%02x:%02x:%02x:%02x:%02x",
885 addr
[0], addr
[1], addr
[2], addr
[3], addr
[4], addr
[5]);
887 fw3_ipt_rule_addarg(r
, false, "-m", "mac");
888 fw3_ipt_rule_addarg(r
, mac
->invert
, "--mac-source", buf
);
892 fw3_ipt_rule_icmptype(struct fw3_ipt_rule
*r
, struct fw3_icmptype
*icmp
)
894 char buf
[sizeof("255/255\0")];
900 if (r
->h
->family
== FW3_FAMILY_V6
)
902 if (icmp
->code6_min
== 0 && icmp
->code6_max
== 0xFF)
903 sprintf(buf
, "%u", icmp
->type6
);
905 sprintf(buf
, "%u/%u", icmp
->type6
, icmp
->code6_min
);
907 fw3_ipt_rule_addarg(r
, icmp
->invert
, "--icmpv6-type", buf
);
912 if (icmp
->code_min
== 0 && icmp
->code_max
== 0xFF)
913 sprintf(buf
, "%u", icmp
->type
);
915 sprintf(buf
, "%u/%u", icmp
->type
, icmp
->code_min
);
917 fw3_ipt_rule_addarg(r
, icmp
->invert
, "--icmp-type", buf
);
922 fw3_ipt_rule_limit(struct fw3_ipt_rule
*r
, struct fw3_limit
*limit
)
924 char buf
[sizeof("-4294967296/second\0")];
926 if (!limit
|| limit
->rate
<= 0)
929 fw3_ipt_rule_addarg(r
, false, "-m", "limit");
931 sprintf(buf
, "%u/%s", limit
->rate
, fw3_limit_units
[limit
->unit
]);
932 fw3_ipt_rule_addarg(r
, limit
->invert
, "--limit", buf
);
934 if (limit
->burst
> 0)
936 sprintf(buf
, "%u", limit
->burst
);
937 fw3_ipt_rule_addarg(r
, limit
->invert
, "--limit-burst", buf
);
942 fw3_ipt_rule_ipset(struct fw3_ipt_rule
*r
, struct fw3_setmatch
*match
)
944 char buf
[sizeof("dst,dst,dst\0")];
948 struct fw3_ipset
*set
;
949 struct fw3_ipset_datatype
*type
;
951 if (!match
|| !match
->set
|| !match
->ptr
)
955 list_for_each_entry(type
, &set
->datatypes
, list
)
963 p
+= sprintf(p
, "%s", match
->dir
[i
] ? match
->dir
[i
] : type
->dir
);
967 fw3_ipt_rule_addarg(r
, false, "-m", "set");
969 fw3_ipt_rule_addarg(r
, match
->invert
, "--match-set",
970 set
->external
? set
->external
: set
->name
);
972 fw3_ipt_rule_addarg(r
, false, buf
, NULL
);
976 fw3_ipt_rule_time(struct fw3_ipt_rule
*r
, struct fw3_time
*time
)
979 struct tm empty
= { 0 };
981 char buf
[84]; /* sizeof("1,2,3,...,30,31\0") */
984 bool d1
= memcmp(&time
->datestart
, &empty
, sizeof(empty
));
985 bool d2
= memcmp(&time
->datestop
, &empty
, sizeof(empty
));
987 if (!d1
&& !d2
&& !time
->timestart
&& !time
->timestop
&&
988 !(time
->monthdays
& 0xFFFFFFFE) && !(time
->weekdays
& 0xFE))
993 fw3_ipt_rule_addarg(r
, false, "-m", "time");
996 fw3_ipt_rule_addarg(r
, false, "--utc", NULL
);
1000 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestart
);
1001 fw3_ipt_rule_addarg(r
, false, "--datestart", buf
);
1006 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestop
);
1007 fw3_ipt_rule_addarg(r
, false, "--datestop", buf
);
1010 if (time
->timestart
)
1012 sprintf(buf
, "%02d:%02d:%02d",
1013 time
->timestart
/ 3600,
1014 time
->timestart
% 3600 / 60,
1015 time
->timestart
% 60);
1017 fw3_ipt_rule_addarg(r
, false, "--timestart", buf
);
1022 sprintf(buf
, "%02d:%02d:%02d",
1023 time
->timestop
/ 3600,
1024 time
->timestop
% 3600 / 60,
1025 time
->timestop
% 60);
1027 fw3_ipt_rule_addarg(r
, false, "--timestop", buf
);
1030 if (time
->monthdays
& 0xFFFFFFFE)
1032 for (i
= 1, p
= buf
; i
< 32; i
++)
1034 if (fw3_hasbit(time
->monthdays
, i
))
1039 p
+= sprintf(p
, "%u", i
);
1043 fw3_ipt_rule_addarg(r
, fw3_hasbit(time
->monthdays
, 0), "--monthdays", buf
);
1046 if (time
->weekdays
& 0xFE)
1048 for (i
= 1, p
= buf
; i
< 8; i
++)
1050 if (fw3_hasbit(time
->weekdays
, i
))
1055 p
+= sprintf(p
, "%u", i
);
1059 fw3_ipt_rule_addarg(r
, fw3_hasbit(time
->weekdays
, 0), "--weekdays", buf
);
1064 fw3_ipt_rule_mark(struct fw3_ipt_rule
*r
, struct fw3_mark
*mark
)
1066 char buf
[sizeof("0xFFFFFFFF/0xFFFFFFFF\0")];
1068 if (!mark
|| !mark
->set
)
1071 if (mark
->mask
< 0xFFFFFFFF)
1072 sprintf(buf
, "0x%x/0x%x", mark
->mark
, mark
->mask
);
1074 sprintf(buf
, "0x%x", mark
->mark
);
1076 fw3_ipt_rule_addarg(r
, false, "-m", "mark");
1077 fw3_ipt_rule_addarg(r
, mark
->invert
, "--mark", buf
);
1081 fw3_ipt_rule_comment(struct fw3_ipt_rule
*r
, const char *fmt
, ...)
1090 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
1093 fw3_ipt_rule_addarg(r
, false, "-m", "comment");
1094 fw3_ipt_rule_addarg(r
, false, "--comment", buf
);
1098 fw3_ipt_rule_extra(struct fw3_ipt_rule
*r
, const char *extra
)
1102 if (!extra
|| !*extra
)
1105 s
= fw3_strdup(extra
);
1107 for (p
= strtok(s
, " \t"); p
; p
= strtok(NULL
, " \t"))
1109 tmp
= realloc(r
->argv
, (r
->argc
+ 1) * sizeof(*r
->argv
));
1115 r
->argv
[r
->argc
++] = fw3_strdup(p
);
1121 #ifndef DISABLE_IPV6
1123 rule_print6(struct ip6t_entry
*e
)
1125 char buf1
[INET6_ADDRSTRLEN
], buf2
[INET6_ADDRSTRLEN
];
1128 if (e
->ipv6
.flags
& IP6T_F_PROTO
)
1130 if (e
->ipv6
.invflags
& XT_INV_PROTO
)
1133 pname
= get_protoname(container_of(e
, struct fw3_ipt_rule
, e6
));
1136 printf(" -p %s", pname
);
1138 printf(" -p %u", e
->ipv6
.proto
);
1141 if (e
->ipv6
.iniface
[0])
1143 if (e
->ipv6
.invflags
& IP6T_INV_VIA_IN
)
1146 printf(" -i %s", e
->ipv6
.iniface
);
1149 if (e
->ipv6
.outiface
[0])
1151 if (e
->ipv6
.invflags
& IP6T_INV_VIA_OUT
)
1154 printf(" -o %s", e
->ipv6
.outiface
);
1157 if (memcmp(&e
->ipv6
.src
, &in6addr_any
, sizeof(struct in6_addr
)))
1159 if (e
->ipv6
.invflags
& IP6T_INV_SRCIP
)
1163 inet_ntop(AF_INET6
, &e
->ipv6
.src
, buf1
, sizeof(buf1
)),
1164 inet_ntop(AF_INET6
, &e
->ipv6
.smsk
, buf2
, sizeof(buf2
)));
1167 if (memcmp(&e
->ipv6
.dst
, &in6addr_any
, sizeof(struct in6_addr
)))
1169 if (e
->ipv6
.invflags
& IP6T_INV_DSTIP
)
1173 inet_ntop(AF_INET6
, &e
->ipv6
.dst
, buf1
, sizeof(buf1
)),
1174 inet_ntop(AF_INET6
, &e
->ipv6
.dmsk
, buf2
, sizeof(buf2
)));
1180 rule_print4(struct ipt_entry
*e
)
1182 struct in_addr in_zero
= { 0 };
1183 char buf1
[sizeof("255.255.255.255\0")], buf2
[sizeof("255.255.255.255\0")];
1188 if (e
->ip
.invflags
& XT_INV_PROTO
)
1191 pname
= get_protoname(container_of(e
, struct fw3_ipt_rule
, e
));
1194 printf(" -p %s", pname
);
1196 printf(" -p %u", e
->ip
.proto
);
1199 if (e
->ip
.iniface
[0])
1201 if (e
->ip
.invflags
& IPT_INV_VIA_IN
)
1204 printf(" -i %s", e
->ip
.iniface
);
1207 if (e
->ip
.outiface
[0])
1209 if (e
->ip
.invflags
& IPT_INV_VIA_OUT
)
1212 printf(" -o %s", e
->ip
.outiface
);
1215 if (memcmp(&e
->ip
.src
, &in_zero
, sizeof(struct in_addr
)))
1217 if (e
->ip
.invflags
& IPT_INV_SRCIP
)
1221 inet_ntop(AF_INET
, &e
->ip
.src
, buf1
, sizeof(buf1
)),
1222 inet_ntop(AF_INET
, &e
->ip
.smsk
, buf2
, sizeof(buf2
)));
1225 if (memcmp(&e
->ip
.dst
, &in_zero
, sizeof(struct in_addr
)))
1227 if (e
->ip
.invflags
& IPT_INV_DSTIP
)
1231 inet_ntop(AF_INET
, &e
->ip
.dst
, buf1
, sizeof(buf1
)),
1232 inet_ntop(AF_INET
, &e
->ip
.dmsk
, buf2
, sizeof(buf2
)));
1237 rule_print(struct fw3_ipt_rule
*r
, const char *prefix
, const char *chain
)
1239 debug(r
->h
, "%s %s", prefix
, chain
);
1241 #ifndef DISABLE_IPV6
1242 if (r
->h
->family
== FW3_FAMILY_V6
)
1243 rule_print6(&r
->e6
);
1248 fw3_xt_print_matches(&r
->e
.ip
, r
->matches
);
1249 fw3_xt_print_target(&r
->e
.ip
, r
->target
);
1255 parse_option(struct fw3_ipt_rule
*r
, int optc
, bool inv
)
1257 struct xtables_rule_match
*m
;
1258 struct xtables_match
*em
;
1260 /* is a target option */
1261 if (r
->target
&& fw3_xt_has_target_parse(r
->target
) &&
1262 optc
>= r
->target
->option_offset
&&
1263 optc
< (r
->target
->option_offset
+ 256))
1265 xtables_option_tpcall(optc
, r
->argv
, inv
, r
->target
, &r
->e
);
1269 /* try to dispatch argument to one of the match parsers */
1270 for (m
= r
->matches
; m
; m
= m
->next
)
1274 if (m
->completed
|| !fw3_xt_has_match_parse(em
))
1277 if (optc
< em
->option_offset
||
1278 optc
>= (em
->option_offset
+ 256))
1281 xtables_option_mpcall(optc
, r
->argv
, inv
, em
, &r
->e
);
1285 /* unhandled option, might belong to a protocol match */
1286 if ((em
= load_protomatch(r
)) != NULL
)
1288 init_match(r
, em
, false);
1290 r
->protocol_loaded
= true;
1297 warn("parse_option(): option '%s' needs argument", r
->argv
[optind
-1]);
1300 warn("parse_option(): unknown option '%s'", r
->argv
[optind
-1]);
1306 fw3_ipt_rule_addarg(struct fw3_ipt_rule
*r
, bool inv
,
1307 const char *k
, const char *v
)
1315 n
= inv
+ !!k
+ !!v
;
1316 tmp
= realloc(r
->argv
, (r
->argc
+ n
) * sizeof(*tmp
));
1324 r
->argv
[r
->argc
++] = fw3_strdup("!");
1326 r
->argv
[r
->argc
++] = fw3_strdup(k
);
1329 r
->argv
[r
->argc
++] = fw3_strdup(v
);
1332 static unsigned char *
1333 rule_mask(struct fw3_ipt_rule
*r
)
1336 unsigned char *p
, *mask
= NULL
;
1337 struct xtables_rule_match
*m
;
1339 #define SZ(x) XT_ALIGN(sizeof(struct x))
1341 #ifndef DISABLE_IPV6
1342 if (r
->h
->family
== FW3_FAMILY_V6
)
1346 for (m
= r
->matches
; m
; m
= m
->next
)
1347 s
+= SZ(ip6t_entry_match
) + m
->match
->size
;
1349 s
+= SZ(ip6t_entry_target
);
1351 s
+= r
->target
->size
;
1353 mask
= fw3_alloc(s
);
1354 memset(mask
, 0xFF, SZ(ip6t_entry
));
1355 p
= mask
+ SZ(ip6t_entry
);
1357 for (m
= r
->matches
; m
; m
= m
->next
)
1359 memset(p
, 0xFF, SZ(ip6t_entry_match
) + m
->match
->userspacesize
);
1360 p
+= SZ(ip6t_entry_match
) + m
->match
->size
;
1363 memset(p
, 0xFF, SZ(ip6t_entry_target
) + (r
->target
) ? r
->target
->userspacesize
: 0);
1370 for (m
= r
->matches
; m
; m
= m
->next
)
1371 s
+= SZ(ipt_entry_match
) + m
->match
->size
;
1373 s
+= SZ(ipt_entry_target
);
1375 s
+= r
->target
->size
;
1377 mask
= fw3_alloc(s
);
1378 memset(mask
, 0xFF, SZ(ipt_entry
));
1379 p
= mask
+ SZ(ipt_entry
);
1381 for (m
= r
->matches
; m
; m
= m
->next
)
1383 memset(p
, 0xFF, SZ(ipt_entry_match
) + m
->match
->userspacesize
);
1384 p
+= SZ(ipt_entry_match
) + m
->match
->size
;
1387 memset(p
, 0xFF, SZ(ipt_entry_target
) + (r
->target
) ? r
->target
->userspacesize
: 0);
1394 rule_build(struct fw3_ipt_rule
*r
)
1396 size_t s
, target_size
= (r
->target
) ? r
->target
->t
->u
.target_size
: 0;
1397 struct xtables_rule_match
*m
;
1399 #ifndef DISABLE_IPV6
1400 if (r
->h
->family
== FW3_FAMILY_V6
)
1402 struct ip6t_entry
*e6
;
1404 s
= XT_ALIGN(sizeof(struct ip6t_entry
));
1406 for (m
= r
->matches
; m
; m
= m
->next
)
1407 s
+= m
->match
->m
->u
.match_size
;
1409 e6
= fw3_alloc(s
+ target_size
);
1411 memcpy(e6
, &r
->e6
, sizeof(struct ip6t_entry
));
1413 e6
->target_offset
= s
;
1414 e6
->next_offset
= s
+ target_size
;
1418 for (m
= r
->matches
; m
; m
= m
->next
)
1420 memcpy(e6
->elems
+ s
, m
->match
->m
, m
->match
->m
->u
.match_size
);
1421 s
+= m
->match
->m
->u
.match_size
;
1425 memcpy(e6
->elems
+ s
, r
->target
->t
, target_size
);
1432 struct ipt_entry
*e
;
1434 s
= XT_ALIGN(sizeof(struct ipt_entry
));
1436 for (m
= r
->matches
; m
; m
= m
->next
)
1437 s
+= m
->match
->m
->u
.match_size
;
1439 e
= fw3_alloc(s
+ target_size
);
1441 memcpy(e
, &r
->e
, sizeof(struct ipt_entry
));
1443 e
->target_offset
= s
;
1444 e
->next_offset
= s
+ target_size
;
1448 for (m
= r
->matches
; m
; m
= m
->next
)
1450 memcpy(e
->elems
+ s
, m
->match
->m
, m
->match
->m
->u
.match_size
);
1451 s
+= m
->match
->m
->u
.match_size
;
1455 memcpy(e
->elems
+ s
, r
->target
->t
, target_size
);
1462 __fw3_ipt_rule_append(struct fw3_ipt_rule
*r
, bool repl
, const char *fmt
, ...)
1465 unsigned char *mask
;
1467 struct xtables_rule_match
*m
;
1468 struct xtables_match
*em
;
1469 struct xtables_target
*et
;
1470 struct xtables_globals
*g
;
1479 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
1482 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
1483 g
->opts
= g
->orig_opts
;
1490 em
= find_match(r
, "id");
1494 warn("fw3_ipt_rule_append(): Can't find match '%s'", "id");
1498 init_match(r
, em
, true);
1500 id
= FW3_ID_MAGIC
| (r
->id
& ~FW3_ID_MASK
);
1501 memcpy(em
->m
->data
, &id
, sizeof(id
));
1506 while ((optc
= getopt_long(r
->argc
, r
->argv
, "-:m:j:", g
->opts
,
1512 em
= find_match(r
, optarg
);
1516 warn("fw3_ipt_rule_append(): Can't find match '%s'", optarg
);
1520 init_match(r
, em
, true);
1524 et
= get_target(r
, optarg
);
1528 warn("fw3_ipt_rule_append(): Can't find target '%s'", optarg
);
1535 if ((optarg
[0] == '!') && (optarg
[1] == '\0'))
1542 warn("fw3_ipt_rule_append(): Bad argument '%s'", optarg
);
1546 if (parse_option(r
, optc
, inv
))
1554 for (m
= r
->matches
; m
; m
= m
->next
)
1555 xtables_option_mfcall(m
->match
);
1558 xtables_option_tfcall(r
->target
);
1560 rule
= rule_build(r
);
1562 #ifndef DISABLE_IPV6
1563 if (r
->h
->family
== FW3_FAMILY_V6
)
1567 mask
= rule_mask(r
);
1569 while (ip6tc_delete_entry(buf
, rule
, mask
, r
->h
->handle
))
1571 rule_print(r
, "-D", buf
);
1577 rule_print(r
, "-A", buf
);
1579 if (!ip6tc_append_entry(buf
, rule
, r
->h
->handle
))
1580 warn("ip6tc_append_entry(): %s", ip6tc_strerror(errno
));
1587 mask
= rule_mask(r
);
1589 while (iptc_delete_entry(buf
, rule
, mask
, r
->h
->handle
))
1591 rule_print(r
, "-D", buf
);
1597 rule_print(r
, "-A", buf
);
1599 if (!iptc_append_entry(buf
, rule
, r
->h
->handle
))
1600 warn("iptc_append_entry(): %s\n", iptc_strerror(errno
));
1606 for (i
= 1; i
< r
->argc
; i
++)
1611 xtables_rule_matches_free(&r
->matches
);
1618 /* reset all targets and matches */
1619 for (em
= xtables_matches
; em
; em
= em
->next
)
1622 for (et
= xtables_targets
; et
; et
= et
->next
)
1628 xtables_free_opts(1);
1631 struct fw3_ipt_rule
*
1632 fw3_ipt_rule_create(struct fw3_ipt_handle
*handle
, struct fw3_protocol
*proto
,
1633 struct fw3_device
*in
, struct fw3_device
*out
,
1634 struct fw3_address
*src
, struct fw3_address
*dest
)
1636 struct fw3_ipt_rule
*r
;
1638 r
= fw3_ipt_rule_new(handle
);
1640 fw3_ipt_rule_proto(r
, proto
);
1641 fw3_ipt_rule_in_out(r
, in
, out
);
1642 fw3_ipt_rule_src_dest(r
, src
, dest
);
1648 xtables_register_match(struct xtables_match
*me
)
1651 static struct xtables_match
**tmp
;
1653 if (!xext
.register_match
)
1654 xext
.register_match
= dlsym(RTLD_NEXT
, "xtables_register_match");
1656 if (!xext
.register_match
)
1659 xext
.register_match(me
);
1663 for (i
= 0; i
< xext
.mcount
; i
++)
1664 if (xext
.matches
[i
] == me
)
1667 tmp
= realloc(xext
.matches
, sizeof(me
) * (xext
.mcount
+ 1));
1673 xext
.matches
[xext
.mcount
++] = me
;
1678 xtables_register_target(struct xtables_target
*me
)
1681 static struct xtables_target
**tmp
;
1683 if (!xext
.register_target
)
1684 xext
.register_target
= dlsym(RTLD_NEXT
, "xtables_register_target");
1686 if (!xext
.register_target
)
1689 xext
.register_target(me
);
1693 for (i
= 0; i
< xext
.tcount
; i
++)
1694 if (xext
.targets
[i
] == me
)
1697 tmp
= realloc(xext
.targets
, sizeof(me
) * (xext
.tcount
+ 1));
1703 xext
.targets
[xext
.tcount
++] = me
;