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.
19 #define _GNU_SOURCE /* RTLD_NEXT */
21 /* include userspace headers */
26 #include <netinet/in.h>
27 #include <sys/utsname.h>
28 #include <sys/socket.h>
30 /* prevent indirect inclusion of kernel headers */
35 /* prevent libiptc from including kernel headers */
36 #define _FWCHAINS_KERNEL_HEADERS_H
38 /* finally include libiptc and xtables */
39 #include <libiptc/libiptc.h>
40 #include <libiptc/libip6tc.h>
45 /* xtables interface */
46 #if (XTABLES_VERSION_CODE >= 10)
47 # include "xtables-10.h"
48 #elif (XTABLES_VERSION_CODE == 5)
49 # include "xtables-5.h"
51 # error "Unsupported xtables version"
58 struct fw3_ipt_handle
*h
;
65 struct xtables_rule_match
*matches
;
66 struct xtables_target
*target
;
75 static struct option base_opts
[] = {
76 { .name
= "match", .has_arg
= 1, .val
= 'm' },
77 { .name
= "jump", .has_arg
= 1, .val
= 'j' },
81 static struct xtables_globals xtg
= {
83 .program_version
= "4",
84 .orig_opts
= base_opts
,
85 #if XTABLES_VERSION_CODE > 10
86 .compat_rev
= xtables_compatible_revision
,
90 static struct xtables_globals xtg6
= {
92 .program_version
= "6",
93 .orig_opts
= base_opts
,
94 #if XTABLES_VERSION_CODE > 10
95 .compat_rev
= xtables_compatible_revision
,
102 struct xtables_match
**matches
;
103 struct xtables_target
**targets
;
104 void (*register_match
)(struct xtables_match
*);
105 void (*register_target
)(struct xtables_target
*);
109 /* Required by certain extensions like SNAT and DNAT */
110 int kernel_version
= 0;
113 get_kernel_version(void)
115 static struct utsname uts
;
116 int x
= 0, y
= 0, z
= 0;
118 if (uname(&uts
) == -1)
119 sprintf(uts
.release
, "3.0.0");
121 sscanf(uts
.release
, "%d.%d.%d", &x
, &y
, &z
);
122 kernel_version
= 0x10000 * x
+ 0x100 * y
+ z
;
125 static void fw3_init_extensions(void)
135 struct fw3_ipt_handle
*
136 fw3_ipt_open(enum fw3_family family
, enum fw3_table table
)
139 struct fw3_ipt_handle
*h
;
141 h
= fw3_alloc(sizeof(*h
));
145 if (family
== FW3_FAMILY_V6
)
148 h
->family
= FW3_FAMILY_V6
;
150 h
->handle
= ip6tc_init(fw3_flag_names
[table
]);
152 xtables_set_params(&xtg6
);
153 xtables_set_nfproto(NFPROTO_IPV6
);
158 h
->family
= FW3_FAMILY_V4
;
160 h
->handle
= iptc_init(fw3_flag_names
[table
]);
162 xtables_set_params(&xtg
);
163 xtables_set_nfproto(NFPROTO_IPV4
);
173 fw3_init_extensions();
175 if (xext
.register_match
)
176 for (i
= 0; i
< xext
.mcount
; i
++)
177 xext
.register_match(xext
.matches
[i
]);
179 if (xext
.register_target
)
180 for (i
= 0; i
< xext
.tcount
; i
++)
181 xext
.register_target(xext
.targets
[i
]);
187 debug(struct fw3_ipt_handle
*h
, const char *fmt
, ...)
191 printf("%s -t %s ", (h
->family
== FW3_FAMILY_V6
) ? "ip6tables" : "iptables",
192 fw3_flag_names
[h
->table
]);
200 fw3_ipt_set_policy(struct fw3_ipt_handle
*h
, const char *chain
,
201 enum fw3_flag policy
)
204 debug(h
, "-P %s %s\n", chain
, fw3_flag_names
[policy
]);
207 if (h
->family
== FW3_FAMILY_V6
)
208 ip6tc_set_policy(chain
, fw3_flag_names
[policy
], NULL
, h
->handle
);
211 iptc_set_policy(chain
, fw3_flag_names
[policy
], NULL
, h
->handle
);
215 fw3_ipt_flush_chain(struct fw3_ipt_handle
*h
, const char *chain
)
218 debug(h
, "-F %s\n", chain
);
221 if (h
->family
== FW3_FAMILY_V6
)
222 ip6tc_flush_entries(chain
, h
->handle
);
225 iptc_flush_entries(chain
, h
->handle
);
229 delete_rules(struct fw3_ipt_handle
*h
, const char *target
)
232 const struct ipt_entry
*e
;
238 if (h
->family
== FW3_FAMILY_V6
)
240 for (chain
= ip6tc_first_chain(h
->handle
);
242 chain
= ip6tc_next_chain(h
->handle
))
247 const struct ip6t_entry
*e6
;
248 for (num
= 0, e6
= ip6tc_first_rule(chain
, h
->handle
);
250 num
++, e6
= ip6tc_next_rule(e6
, h
->handle
))
252 t
= ip6tc_get_target(e6
, h
->handle
);
254 if (*t
&& !strcmp(t
, target
))
257 debug(h
, "-D %s %u\n", chain
, num
+ 1);
259 ip6tc_delete_num_entry(chain
, num
, h
->handle
);
270 for (chain
= iptc_first_chain(h
->handle
);
272 chain
= iptc_next_chain(h
->handle
))
277 for (num
= 0, e
= iptc_first_rule(chain
, h
->handle
);
279 num
++, e
= iptc_next_rule(e
, h
->handle
))
281 t
= iptc_get_target(e
, h
->handle
);
283 if (*t
&& !strcmp(t
, target
))
286 debug(h
, "-D %s %u\n", chain
, num
+ 1);
288 iptc_delete_num_entry(chain
, num
, h
->handle
);
299 fw3_ipt_delete_chain(struct fw3_ipt_handle
*h
, const char *chain
)
301 delete_rules(h
, chain
);
304 debug(h
, "-X %s\n", chain
);
307 if (h
->family
== FW3_FAMILY_V6
)
308 ip6tc_delete_chain(chain
, h
->handle
);
311 iptc_delete_chain(chain
, h
->handle
);
315 has_rule_tag(const void *base
, unsigned int start
, unsigned int end
)
318 const struct xt_entry_match
*em
;
320 for (i
= start
; i
< end
; i
+= em
->u
.match_size
)
324 if (strcmp(em
->u
.user
.name
, "comment"))
327 if (!memcmp(em
->data
, "!fw3", 4))
335 fw3_ipt_delete_id_rules(struct fw3_ipt_handle
*h
, const char *chain
)
338 const struct ipt_entry
*e
;
342 if (h
->family
== FW3_FAMILY_V6
)
344 if (!ip6tc_is_chain(chain
, h
->handle
))
350 const struct ip6t_entry
*e6
;
351 for (num
= 0, e6
= ip6tc_first_rule(chain
, h
->handle
);
353 num
++, e6
= ip6tc_next_rule(e6
, h
->handle
))
355 if (has_rule_tag(e6
, sizeof(*e6
), e6
->target_offset
))
358 debug(h
, "-D %s %u\n", chain
, num
+ 1);
360 ip6tc_delete_num_entry(chain
, num
, h
->handle
);
370 if (!iptc_is_chain(chain
, h
->handle
))
376 for (num
= 0, e
= iptc_first_rule(chain
, h
->handle
);
378 num
++, e
= iptc_next_rule(e
, h
->handle
))
380 if (has_rule_tag(e
, sizeof(*e
), e
->target_offset
))
383 debug(h
, "-D %s %u\n", chain
, num
+ 1);
385 iptc_delete_num_entry(chain
, num
, h
->handle
);
395 fw3_ipt_create_chain(struct fw3_ipt_handle
*h
, const char *fmt
, ...)
401 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
405 debug(h
, "-N %s\n", buf
);
407 iptc_create_chain(buf
, h
->handle
);
411 fw3_ipt_flush(struct fw3_ipt_handle
*h
)
416 if (h
->family
== FW3_FAMILY_V6
)
418 for (chain
= ip6tc_first_chain(h
->handle
);
420 chain
= ip6tc_next_chain(h
->handle
))
422 ip6tc_flush_entries(chain
, h
->handle
);
425 for (chain
= ip6tc_first_chain(h
->handle
);
427 chain
= ip6tc_next_chain(h
->handle
))
429 ip6tc_delete_chain(chain
, h
->handle
);
435 for (chain
= iptc_first_chain(h
->handle
);
437 chain
= iptc_next_chain(h
->handle
))
439 iptc_flush_entries(chain
, h
->handle
);
442 for (chain
= iptc_first_chain(h
->handle
);
444 chain
= iptc_next_chain(h
->handle
))
446 iptc_delete_chain(chain
, h
->handle
);
452 chain_is_empty(struct fw3_ipt_handle
*h
, const char *chain
)
455 if (h
->family
== FW3_FAMILY_V6
)
456 return (!ip6tc_builtin(chain
, h
->handle
) &&
457 !ip6tc_first_rule(chain
, h
->handle
));
460 return (!iptc_builtin(chain
, h
->handle
) &&
461 !iptc_first_rule(chain
, h
->handle
));
465 fw3_ipt_gc(struct fw3_ipt_handle
*h
)
471 if (h
->family
== FW3_FAMILY_V6
)
476 for (chain
= ip6tc_first_chain(h
->handle
);
478 chain
= ip6tc_next_chain(h
->handle
))
480 if (!chain_is_empty(h
, chain
))
483 fw3_ipt_delete_chain(h
, chain
);
495 for (chain
= iptc_first_chain(h
->handle
);
497 chain
= iptc_next_chain(h
->handle
))
499 warn("C=%s\n", chain
);
501 if (!chain_is_empty(h
, chain
))
504 warn("D=%s\n", chain
);
506 fw3_ipt_delete_chain(h
, chain
);
515 fw3_ipt_commit(struct fw3_ipt_handle
*h
)
520 if (h
->family
== FW3_FAMILY_V6
)
522 rv
= ip6tc_commit(h
->handle
);
524 warn("ip6tc_commit(): %s", ip6tc_strerror(errno
));
529 rv
= iptc_commit(h
->handle
);
531 warn("iptc_commit(): %s", iptc_strerror(errno
));
536 fw3_ipt_close(struct fw3_ipt_handle
*h
)
541 struct fw3_ipt_rule
*
542 fw3_ipt_rule_new(struct fw3_ipt_handle
*h
)
544 struct fw3_ipt_rule
*r
;
546 r
= fw3_alloc(sizeof(*r
));
549 r
->argv
= fw3_alloc(sizeof(char *));
550 r
->argv
[r
->argc
++] = "fw3";
557 is_chain(struct fw3_ipt_handle
*h
, const char *name
)
560 if (h
->family
== FW3_FAMILY_V6
)
561 return ip6tc_is_chain(name
, h
->handle
);
564 return iptc_is_chain(name
, h
->handle
);
568 get_protoname(struct fw3_ipt_rule
*r
)
570 const struct xtables_pprot
*pp
;
573 for (pp
= xtables_chain_protos
; pp
->name
; pp
++)
574 if (pp
->num
== r
->protocol
)
575 return (char *)pp
->name
;
580 static struct xtables_match
*
581 find_match(struct fw3_ipt_rule
*r
, const char *name
)
583 struct xtables_match
*m
;
586 m
= xtables_find_match(name
, XTF_TRY_LOAD
, &r
->matches
);
593 init_match(struct fw3_ipt_rule
*r
, struct xtables_match
*m
, bool no_clone
)
596 struct xtables_globals
*g
;
601 s
= XT_ALIGN(sizeof(struct xt_entry_match
)) + m
->size
;
605 fw3_xt_set_match_name(m
);
607 m
->m
->u
.user
.revision
= m
->revision
;
608 m
->m
->u
.match_size
= s
;
610 /* free previous userspace data */
611 fw3_xt_free_match_udata(m
);
616 /* don't merge options if no_clone is set and this match is a clone */
617 if (no_clone
&& (m
== m
->next
))
620 /* merge option table */
621 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
622 fw3_xt_merge_match_options(g
, m
);
626 need_protomatch(struct fw3_ipt_rule
*r
, const char *pname
)
631 if (!xtables_find_match(pname
, XTF_DONT_LOAD
, NULL
))
634 return !r
->protocol_loaded
;
637 static struct xtables_match
*
638 load_protomatch(struct fw3_ipt_rule
*r
)
640 const char *pname
= get_protoname(r
);
642 if (!need_protomatch(r
, pname
))
645 return find_match(r
, pname
);
648 static struct xtables_target
*
649 find_target(struct fw3_ipt_rule
*r
, const char *name
)
651 struct xtables_target
*t
;
655 if (is_chain(r
->h
, name
))
656 t
= xtables_find_target(XT_STANDARD_TARGET
, XTF_TRY_LOAD
);
658 t
= xtables_find_target(name
, XTF_TRY_LOAD
);
665 static struct xtables_target
*
666 get_target(struct fw3_ipt_rule
*r
, const char *name
)
669 struct xtables_target
*t
;
670 struct xtables_globals
*g
;
672 t
= find_target(r
, name
);
677 s
= XT_ALIGN(sizeof(struct xt_entry_target
)) + t
->size
;
680 fw3_xt_set_target_name(t
, name
);
682 t
->t
->u
.user
.revision
= t
->revision
;
683 t
->t
->u
.target_size
= s
;
685 /* free previous userspace data */
686 fw3_xt_free_target_udata(t
);
691 /* merge option table */
692 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
693 fw3_xt_merge_target_options(g
, t
);
701 fw3_ipt_rule_proto(struct fw3_ipt_rule
*r
, struct fw3_protocol
*proto
)
705 if (!proto
|| proto
->any
)
708 pr
= proto
->protocol
;
711 if (r
->h
->family
== FW3_FAMILY_V6
)
716 r
->e6
.ipv6
.proto
= pr
;
717 r
->e6
.ipv6
.flags
|= IP6T_F_PROTO
;
720 r
->e6
.ipv6
.invflags
|= XT_INV_PROTO
;
728 r
->e
.ip
.invflags
|= XT_INV_PROTO
;
735 fw3_ipt_rule_in_out(struct fw3_ipt_rule
*r
,
736 struct fw3_device
*in
, struct fw3_device
*out
)
739 if (r
->h
->family
== FW3_FAMILY_V6
)
743 xtables_parse_interface(in
->name
, r
->e6
.ipv6
.iniface
,
744 r
->e6
.ipv6
.iniface_mask
);
747 r
->e6
.ipv6
.invflags
|= IP6T_INV_VIA_IN
;
750 if (out
&& !out
->any
)
752 xtables_parse_interface(out
->name
, r
->e6
.ipv6
.outiface
,
753 r
->e6
.ipv6
.outiface_mask
);
756 r
->e6
.ipv6
.invflags
|= IP6T_INV_VIA_OUT
;
764 xtables_parse_interface(in
->name
, r
->e
.ip
.iniface
,
765 r
->e
.ip
.iniface_mask
);
768 r
->e
.ip
.invflags
|= IPT_INV_VIA_IN
;
771 if (out
&& !out
->any
)
773 xtables_parse_interface(out
->name
, r
->e
.ip
.outiface
,
774 r
->e
.ip
.outiface_mask
);
777 r
->e
.ip
.invflags
|= IPT_INV_VIA_OUT
;
784 fw3_ipt_rule_src_dest(struct fw3_ipt_rule
*r
,
785 struct fw3_address
*src
, struct fw3_address
*dest
)
787 if ((src
&& src
->range
) || (dest
&& dest
->range
))
789 fw3_ipt_rule_addarg(r
, false, "-m", "iprange");
796 fw3_ipt_rule_addarg(r
, src
->invert
, "--src-range",
797 fw3_address_to_string(src
, false, false));
800 else if (r
->h
->family
== FW3_FAMILY_V6
)
802 r
->e6
.ipv6
.src
= src
->address
.v6
;
803 r
->e6
.ipv6
.smsk
= src
->mask
.v6
;
806 for (i
= 0; i
< 4; i
++)
807 r
->e6
.ipv6
.src
.s6_addr32
[i
] &= r
->e6
.ipv6
.smsk
.s6_addr32
[i
];
810 r
->e6
.ipv6
.invflags
|= IP6T_INV_SRCIP
;
815 r
->e
.ip
.src
= src
->address
.v4
;
816 r
->e
.ip
.smsk
= src
->mask
.v4
;
818 r
->e
.ip
.src
.s_addr
&= r
->e
.ip
.smsk
.s_addr
;
821 r
->e
.ip
.invflags
|= IPT_INV_SRCIP
;
825 if (dest
&& dest
->set
)
829 fw3_ipt_rule_addarg(r
, dest
->invert
, "--dst-range",
830 fw3_address_to_string(dest
, false, false));
833 else if (r
->h
->family
== FW3_FAMILY_V6
)
835 r
->e6
.ipv6
.dst
= dest
->address
.v6
;
836 r
->e6
.ipv6
.dmsk
= dest
->mask
.v6
;
839 for (i
= 0; i
< 4; i
++)
840 r
->e6
.ipv6
.dst
.s6_addr32
[i
] &= r
->e6
.ipv6
.dmsk
.s6_addr32
[i
];
843 r
->e6
.ipv6
.invflags
|= IP6T_INV_DSTIP
;
848 r
->e
.ip
.dst
= dest
->address
.v4
;
849 r
->e
.ip
.dmsk
= dest
->mask
.v4
;
851 r
->e
.ip
.dst
.s_addr
&= r
->e
.ip
.dmsk
.s_addr
;
854 r
->e
.ip
.invflags
|= IPT_INV_DSTIP
;
860 fw3_ipt_rule_sport_dport(struct fw3_ipt_rule
*r
,
861 struct fw3_port
*sp
, struct fw3_port
*dp
)
863 char buf
[sizeof("65535:65535\0")];
865 if ((!sp
|| !sp
->set
) && (!dp
|| !dp
->set
))
868 if (!get_protoname(r
))
873 if (sp
->port_min
== sp
->port_max
)
874 sprintf(buf
, "%u", sp
->port_min
);
876 sprintf(buf
, "%u:%u", sp
->port_min
, sp
->port_max
);
878 fw3_ipt_rule_addarg(r
, sp
->invert
, "--sport", buf
);
883 if (dp
->port_min
== dp
->port_max
)
884 sprintf(buf
, "%u", dp
->port_min
);
886 sprintf(buf
, "%u:%u", dp
->port_min
, dp
->port_max
);
888 fw3_ipt_rule_addarg(r
, dp
->invert
, "--dport", buf
);
893 fw3_ipt_rule_device(struct fw3_ipt_rule
*r
, const char *device
, bool out
)
896 struct fw3_device dev
= { .any
= false };
897 strncpy(dev
.name
, device
, sizeof(dev
.name
) - 1);
898 fw3_ipt_rule_in_out(r
, (out
) ? NULL
: &dev
, (out
) ? &dev
: NULL
);
903 fw3_ipt_rule_mac(struct fw3_ipt_rule
*r
, struct fw3_mac
*mac
)
905 char buf
[sizeof("ff:ff:ff:ff:ff:ff\0")];
906 uint8_t *addr
= mac
->mac
.ether_addr_octet
;
911 sprintf(buf
, "%02x:%02x:%02x:%02x:%02x:%02x",
912 addr
[0], addr
[1], addr
[2], addr
[3], addr
[4], addr
[5]);
914 fw3_ipt_rule_addarg(r
, false, "-m", "mac");
915 fw3_ipt_rule_addarg(r
, mac
->invert
, "--mac-source", buf
);
919 fw3_ipt_rule_icmptype(struct fw3_ipt_rule
*r
, struct fw3_icmptype
*icmp
)
921 char buf
[sizeof("255/255\0")];
927 if (r
->h
->family
== FW3_FAMILY_V6
)
929 if (icmp
->code6_min
== 0 && icmp
->code6_max
== 0xFF)
930 sprintf(buf
, "%u", icmp
->type6
);
932 sprintf(buf
, "%u/%u", icmp
->type6
, icmp
->code6_min
);
934 fw3_ipt_rule_addarg(r
, icmp
->invert
, "--icmpv6-type", buf
);
939 if (icmp
->code_min
== 0 && icmp
->code_max
== 0xFF)
940 sprintf(buf
, "%u", icmp
->type
);
942 sprintf(buf
, "%u/%u", icmp
->type
, icmp
->code_min
);
944 fw3_ipt_rule_addarg(r
, icmp
->invert
, "--icmp-type", buf
);
949 fw3_ipt_rule_limit(struct fw3_ipt_rule
*r
, struct fw3_limit
*limit
)
951 char buf
[sizeof("-4294967296/second\0")];
953 if (!limit
|| limit
->rate
<= 0)
956 fw3_ipt_rule_addarg(r
, false, "-m", "limit");
958 sprintf(buf
, "%u/%s", limit
->rate
, fw3_limit_units
[limit
->unit
]);
959 fw3_ipt_rule_addarg(r
, limit
->invert
, "--limit", buf
);
961 if (limit
->burst
> 0)
963 sprintf(buf
, "%u", limit
->burst
);
964 fw3_ipt_rule_addarg(r
, limit
->invert
, "--limit-burst", buf
);
969 fw3_ipt_rule_ipset(struct fw3_ipt_rule
*r
, struct fw3_setmatch
*match
)
971 char buf
[sizeof("dst,dst,dst\0")];
975 struct fw3_ipset
*set
;
976 struct fw3_ipset_datatype
*type
;
978 if (!match
|| !match
->set
|| !match
->ptr
)
982 list_for_each_entry(type
, &set
->datatypes
, list
)
990 p
+= sprintf(p
, "%s", match
->dir
[i
] ? match
->dir
[i
] : type
->dir
);
994 fw3_ipt_rule_addarg(r
, false, "-m", "set");
996 fw3_ipt_rule_addarg(r
, match
->invert
, "--match-set",
997 set
->external
? set
->external
: set
->name
);
999 fw3_ipt_rule_addarg(r
, false, buf
, NULL
);
1003 fw3_ipt_rule_time(struct fw3_ipt_rule
*r
, struct fw3_time
*time
)
1006 struct tm empty
= { 0 };
1008 char buf
[84]; /* sizeof("1,2,3,...,30,31\0") */
1011 bool d1
= memcmp(&time
->datestart
, &empty
, sizeof(empty
));
1012 bool d2
= memcmp(&time
->datestop
, &empty
, sizeof(empty
));
1014 if (!d1
&& !d2
&& !time
->timestart
&& !time
->timestop
&&
1015 !(time
->monthdays
& 0xFFFFFFFE) && !(time
->weekdays
& 0xFE))
1020 fw3_ipt_rule_addarg(r
, false, "-m", "time");
1023 fw3_ipt_rule_addarg(r
, false, "--kerneltz", NULL
);
1027 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestart
);
1028 fw3_ipt_rule_addarg(r
, false, "--datestart", buf
);
1033 strftime(buf
, sizeof(buf
), "%Y-%m-%dT%H:%M:%S", &time
->datestop
);
1034 fw3_ipt_rule_addarg(r
, false, "--datestop", buf
);
1037 if (time
->timestart
)
1039 sprintf(buf
, "%02d:%02d:%02d",
1040 time
->timestart
/ 3600,
1041 time
->timestart
% 3600 / 60,
1042 time
->timestart
% 60);
1044 fw3_ipt_rule_addarg(r
, false, "--timestart", buf
);
1049 sprintf(buf
, "%02d:%02d:%02d",
1050 time
->timestop
/ 3600,
1051 time
->timestop
% 3600 / 60,
1052 time
->timestop
% 60);
1054 fw3_ipt_rule_addarg(r
, false, "--timestop", buf
);
1057 if (time
->monthdays
& 0xFFFFFFFE)
1059 for (i
= 1, p
= buf
; i
< 32; i
++)
1061 if (fw3_hasbit(time
->monthdays
, i
))
1066 p
+= sprintf(p
, "%u", i
);
1070 fw3_ipt_rule_addarg(r
, fw3_hasbit(time
->monthdays
, 0), "--monthdays", buf
);
1073 if (time
->weekdays
& 0xFE)
1075 for (i
= 1, p
= buf
; i
< 8; i
++)
1077 if (fw3_hasbit(time
->weekdays
, i
))
1082 p
+= sprintf(p
, "%u", i
);
1086 fw3_ipt_rule_addarg(r
, fw3_hasbit(time
->weekdays
, 0), "--weekdays", buf
);
1091 fw3_ipt_rule_mark(struct fw3_ipt_rule
*r
, struct fw3_mark
*mark
)
1093 char buf
[sizeof("0xFFFFFFFF/0xFFFFFFFF\0")];
1095 if (!mark
|| !mark
->set
)
1098 if (mark
->mask
< 0xFFFFFFFF)
1099 sprintf(buf
, "0x%x/0x%x", mark
->mark
, mark
->mask
);
1101 sprintf(buf
, "0x%x", mark
->mark
);
1103 fw3_ipt_rule_addarg(r
, false, "-m", "mark");
1104 fw3_ipt_rule_addarg(r
, mark
->invert
, "--mark", buf
);
1108 fw3_ipt_rule_comment(struct fw3_ipt_rule
*r
, const char *fmt
, ...)
1117 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
1120 fw3_ipt_rule_addarg(r
, false, "-m", "comment");
1121 fw3_ipt_rule_addarg(r
, false, "--comment", buf
);
1125 fw3_ipt_rule_extra(struct fw3_ipt_rule
*r
, const char *extra
)
1129 if (!extra
|| !*extra
)
1132 s
= fw3_strdup(extra
);
1134 for (p
= strtok(s
, " \t"); p
; p
= strtok(NULL
, " \t"))
1136 tmp
= realloc(r
->argv
, (r
->argc
+ 1) * sizeof(*r
->argv
));
1142 r
->argv
[r
->argc
++] = fw3_strdup(p
);
1148 #ifndef DISABLE_IPV6
1150 rule_print6(struct ip6t_entry
*e
)
1152 char buf1
[INET6_ADDRSTRLEN
], buf2
[INET6_ADDRSTRLEN
];
1155 if (e
->ipv6
.flags
& IP6T_F_PROTO
)
1157 if (e
->ipv6
.invflags
& XT_INV_PROTO
)
1160 pname
= get_protoname(container_of(e
, struct fw3_ipt_rule
, e6
));
1163 printf(" -p %s", pname
);
1165 printf(" -p %u", e
->ipv6
.proto
);
1168 if (e
->ipv6
.iniface
[0])
1170 if (e
->ipv6
.invflags
& IP6T_INV_VIA_IN
)
1173 printf(" -i %s", e
->ipv6
.iniface
);
1176 if (e
->ipv6
.outiface
[0])
1178 if (e
->ipv6
.invflags
& IP6T_INV_VIA_OUT
)
1181 printf(" -o %s", e
->ipv6
.outiface
);
1184 if (memcmp(&e
->ipv6
.src
, &in6addr_any
, sizeof(struct in6_addr
)))
1186 if (e
->ipv6
.invflags
& IP6T_INV_SRCIP
)
1190 inet_ntop(AF_INET6
, &e
->ipv6
.src
, buf1
, sizeof(buf1
)),
1191 inet_ntop(AF_INET6
, &e
->ipv6
.smsk
, buf2
, sizeof(buf2
)));
1194 if (memcmp(&e
->ipv6
.dst
, &in6addr_any
, sizeof(struct in6_addr
)))
1196 if (e
->ipv6
.invflags
& IP6T_INV_DSTIP
)
1200 inet_ntop(AF_INET6
, &e
->ipv6
.dst
, buf1
, sizeof(buf1
)),
1201 inet_ntop(AF_INET6
, &e
->ipv6
.dmsk
, buf2
, sizeof(buf2
)));
1207 rule_print4(struct ipt_entry
*e
)
1209 struct in_addr in_zero
= { 0 };
1210 char buf1
[sizeof("255.255.255.255\0")], buf2
[sizeof("255.255.255.255\0")];
1215 if (e
->ip
.invflags
& XT_INV_PROTO
)
1218 pname
= get_protoname(container_of(e
, struct fw3_ipt_rule
, e
));
1221 printf(" -p %s", pname
);
1223 printf(" -p %u", e
->ip
.proto
);
1226 if (e
->ip
.iniface
[0])
1228 if (e
->ip
.invflags
& IPT_INV_VIA_IN
)
1231 printf(" -i %s", e
->ip
.iniface
);
1234 if (e
->ip
.outiface
[0])
1236 if (e
->ip
.invflags
& IPT_INV_VIA_OUT
)
1239 printf(" -o %s", e
->ip
.outiface
);
1242 if (memcmp(&e
->ip
.src
, &in_zero
, sizeof(struct in_addr
)))
1244 if (e
->ip
.invflags
& IPT_INV_SRCIP
)
1248 inet_ntop(AF_INET
, &e
->ip
.src
, buf1
, sizeof(buf1
)),
1249 inet_ntop(AF_INET
, &e
->ip
.smsk
, buf2
, sizeof(buf2
)));
1252 if (memcmp(&e
->ip
.dst
, &in_zero
, sizeof(struct in_addr
)))
1254 if (e
->ip
.invflags
& IPT_INV_DSTIP
)
1258 inet_ntop(AF_INET
, &e
->ip
.dst
, buf1
, sizeof(buf1
)),
1259 inet_ntop(AF_INET
, &e
->ip
.dmsk
, buf2
, sizeof(buf2
)));
1264 rule_print(struct fw3_ipt_rule
*r
, const char *prefix
, const char *chain
)
1266 debug(r
->h
, "%s %s", prefix
, chain
);
1268 #ifndef DISABLE_IPV6
1269 if (r
->h
->family
== FW3_FAMILY_V6
)
1270 rule_print6(&r
->e6
);
1275 fw3_xt_print_matches(&r
->e
.ip
, r
->matches
);
1276 fw3_xt_print_target(&r
->e
.ip
, r
->target
);
1282 parse_option(struct fw3_ipt_rule
*r
, int optc
, bool inv
)
1284 struct xtables_rule_match
*m
;
1285 struct xtables_match
*em
;
1287 /* is a target option */
1288 if (r
->target
&& fw3_xt_has_target_parse(r
->target
) &&
1289 optc
>= r
->target
->option_offset
&&
1290 optc
< (r
->target
->option_offset
+ 256))
1292 xtables_option_tpcall(optc
, r
->argv
, inv
, r
->target
, &r
->e
);
1296 /* try to dispatch argument to one of the match parsers */
1297 for (m
= r
->matches
; m
; m
= m
->next
)
1301 if (m
->completed
|| !fw3_xt_has_match_parse(em
))
1304 if (optc
< em
->option_offset
||
1305 optc
>= (em
->option_offset
+ 256))
1308 xtables_option_mpcall(optc
, r
->argv
, inv
, em
, &r
->e
);
1312 /* unhandled option, might belong to a protocol match */
1313 if ((em
= load_protomatch(r
)) != NULL
)
1315 init_match(r
, em
, false);
1317 r
->protocol_loaded
= true;
1324 warn("parse_option(): option '%s' needs argument", r
->argv
[optind
-1]);
1327 warn("parse_option(): unknown option '%s'", r
->argv
[optind
-1]);
1333 fw3_ipt_rule_addarg(struct fw3_ipt_rule
*r
, bool inv
,
1334 const char *k
, const char *v
)
1342 n
= inv
+ !!k
+ !!v
;
1343 tmp
= realloc(r
->argv
, (r
->argc
+ n
) * sizeof(*tmp
));
1351 r
->argv
[r
->argc
++] = fw3_strdup("!");
1353 r
->argv
[r
->argc
++] = fw3_strdup(k
);
1356 r
->argv
[r
->argc
++] = fw3_strdup(v
);
1359 static unsigned char *
1360 rule_mask(struct fw3_ipt_rule
*r
)
1363 unsigned char *p
, *mask
= NULL
;
1364 struct xtables_rule_match
*m
;
1366 #define SZ(x) XT_ALIGN(sizeof(struct x))
1368 #ifndef DISABLE_IPV6
1369 if (r
->h
->family
== FW3_FAMILY_V6
)
1373 for (m
= r
->matches
; m
; m
= m
->next
)
1374 s
+= SZ(ip6t_entry_match
) + m
->match
->size
;
1376 s
+= SZ(ip6t_entry_target
);
1378 s
+= r
->target
->size
;
1380 mask
= fw3_alloc(s
);
1381 memset(mask
, 0xFF, SZ(ip6t_entry
));
1382 p
= mask
+ SZ(ip6t_entry
);
1384 for (m
= r
->matches
; m
; m
= m
->next
)
1386 memset(p
, 0xFF, SZ(ip6t_entry_match
) + m
->match
->userspacesize
);
1387 p
+= SZ(ip6t_entry_match
) + m
->match
->size
;
1390 memset(p
, 0xFF, SZ(ip6t_entry_target
) + (r
->target
) ? r
->target
->userspacesize
: 0);
1397 for (m
= r
->matches
; m
; m
= m
->next
)
1398 s
+= SZ(ipt_entry_match
) + m
->match
->size
;
1400 s
+= SZ(ipt_entry_target
);
1402 s
+= r
->target
->size
;
1404 mask
= fw3_alloc(s
);
1405 memset(mask
, 0xFF, SZ(ipt_entry
));
1406 p
= mask
+ SZ(ipt_entry
);
1408 for (m
= r
->matches
; m
; m
= m
->next
)
1410 memset(p
, 0xFF, SZ(ipt_entry_match
) + m
->match
->userspacesize
);
1411 p
+= SZ(ipt_entry_match
) + m
->match
->size
;
1414 memset(p
, 0xFF, SZ(ipt_entry_target
) + (r
->target
) ? r
->target
->userspacesize
: 0);
1421 rule_build(struct fw3_ipt_rule
*r
)
1423 size_t s
, target_size
= (r
->target
) ? r
->target
->t
->u
.target_size
: 0;
1424 struct xtables_rule_match
*m
;
1426 #ifndef DISABLE_IPV6
1427 if (r
->h
->family
== FW3_FAMILY_V6
)
1429 struct ip6t_entry
*e6
;
1431 s
= XT_ALIGN(sizeof(struct ip6t_entry
));
1433 for (m
= r
->matches
; m
; m
= m
->next
)
1434 s
+= m
->match
->m
->u
.match_size
;
1436 e6
= fw3_alloc(s
+ target_size
);
1438 memcpy(e6
, &r
->e6
, sizeof(struct ip6t_entry
));
1440 e6
->target_offset
= s
;
1441 e6
->next_offset
= s
+ target_size
;
1445 for (m
= r
->matches
; m
; m
= m
->next
)
1447 memcpy(e6
->elems
+ s
, m
->match
->m
, m
->match
->m
->u
.match_size
);
1448 s
+= m
->match
->m
->u
.match_size
;
1452 memcpy(e6
->elems
+ s
, r
->target
->t
, target_size
);
1459 struct ipt_entry
*e
;
1461 s
= XT_ALIGN(sizeof(struct ipt_entry
));
1463 for (m
= r
->matches
; m
; m
= m
->next
)
1464 s
+= m
->match
->m
->u
.match_size
;
1466 e
= fw3_alloc(s
+ target_size
);
1468 memcpy(e
, &r
->e
, sizeof(struct ipt_entry
));
1470 e
->target_offset
= s
;
1471 e
->next_offset
= s
+ target_size
;
1475 for (m
= r
->matches
; m
; m
= m
->next
)
1477 memcpy(e
->elems
+ s
, m
->match
->m
, m
->match
->m
->u
.match_size
);
1478 s
+= m
->match
->m
->u
.match_size
;
1482 memcpy(e
->elems
+ s
, r
->target
->t
, target_size
);
1489 set_rule_tag(struct fw3_ipt_rule
*r
)
1493 const char *tag
= "!fw3";
1495 for (i
= 0; i
< r
->argc
; i
++)
1496 if (!strcmp(r
->argv
[i
], "--comment") && (i
+ 1) < r
->argc
)
1497 if (asprintf(&p
, "%s: %s", tag
, r
->argv
[i
+ 1]) > 0)
1499 free(r
->argv
[i
+ 1]);
1504 tmp
= realloc(r
->argv
, (r
->argc
+ 4) * sizeof(*r
->argv
));
1509 r
->argv
[r
->argc
++] = fw3_strdup("-m");
1510 r
->argv
[r
->argc
++] = fw3_strdup("comment");
1511 r
->argv
[r
->argc
++] = fw3_strdup("--comment");
1512 r
->argv
[r
->argc
++] = fw3_strdup(tag
);
1517 __fw3_ipt_rule_append(struct fw3_ipt_rule
*r
, bool repl
, const char *fmt
, ...)
1520 unsigned char *mask
;
1522 struct xtables_rule_match
*m
;
1523 struct xtables_match
*em
;
1524 struct xtables_target
*et
;
1525 struct xtables_globals
*g
;
1533 vsnprintf(buf
, sizeof(buf
) - 1, fmt
, ap
);
1536 g
= (r
->h
->family
== FW3_FAMILY_V6
) ? &xtg6
: &xtg
;
1537 g
->opts
= g
->orig_opts
;
1544 while ((optc
= getopt_long(r
->argc
, r
->argv
, "-:m:j:", g
->opts
,
1550 em
= find_match(r
, optarg
);
1554 warn("fw3_ipt_rule_append(): Can't find match '%s'", optarg
);
1558 init_match(r
, em
, true);
1562 et
= get_target(r
, optarg
);
1566 warn("fw3_ipt_rule_append(): Can't find target '%s'", optarg
);
1573 if ((optarg
[0] == '!') && (optarg
[1] == '\0'))
1580 warn("fw3_ipt_rule_append(): Bad argument '%s'", optarg
);
1584 if (parse_option(r
, optc
, inv
))
1592 for (m
= r
->matches
; m
; m
= m
->next
)
1593 xtables_option_mfcall(m
->match
);
1596 xtables_option_tfcall(r
->target
);
1598 rule
= rule_build(r
);
1600 #ifndef DISABLE_IPV6
1601 if (r
->h
->family
== FW3_FAMILY_V6
)
1605 mask
= rule_mask(r
);
1607 while (ip6tc_delete_entry(buf
, rule
, mask
, r
->h
->handle
))
1609 rule_print(r
, "-D", buf
);
1615 rule_print(r
, "-A", buf
);
1617 if (!ip6tc_append_entry(buf
, rule
, r
->h
->handle
))
1618 warn("ip6tc_append_entry(): %s", ip6tc_strerror(errno
));
1625 mask
= rule_mask(r
);
1627 while (iptc_delete_entry(buf
, rule
, mask
, r
->h
->handle
))
1629 rule_print(r
, "-D", buf
);
1635 rule_print(r
, "-A", buf
);
1637 if (!iptc_append_entry(buf
, rule
, r
->h
->handle
))
1638 warn("iptc_append_entry(): %s\n", iptc_strerror(errno
));
1644 for (i
= 1; i
< r
->argc
; i
++)
1649 xtables_rule_matches_free(&r
->matches
);
1656 /* reset all targets and matches */
1657 for (em
= xtables_matches
; em
; em
= em
->next
)
1660 for (et
= xtables_targets
; et
; et
= et
->next
)
1666 xtables_free_opts(1);
1669 struct fw3_ipt_rule
*
1670 fw3_ipt_rule_create(struct fw3_ipt_handle
*handle
, struct fw3_protocol
*proto
,
1671 struct fw3_device
*in
, struct fw3_device
*out
,
1672 struct fw3_address
*src
, struct fw3_address
*dest
)
1674 struct fw3_ipt_rule
*r
;
1676 r
= fw3_ipt_rule_new(handle
);
1678 fw3_ipt_rule_proto(r
, proto
);
1679 fw3_ipt_rule_in_out(r
, in
, out
);
1680 fw3_ipt_rule_src_dest(r
, src
, dest
);
1686 xtables_register_match(struct xtables_match
*me
)
1689 static struct xtables_match
**tmp
;
1691 if (!xext
.register_match
)
1692 xext
.register_match
= dlsym(RTLD_NEXT
, "xtables_register_match");
1694 if (!xext
.register_match
)
1697 xext
.register_match(me
);
1701 for (i
= 0; i
< xext
.mcount
; i
++)
1702 if (xext
.matches
[i
] == me
)
1705 tmp
= realloc(xext
.matches
, sizeof(me
) * (xext
.mcount
+ 1));
1711 xext
.matches
[xext
.mcount
++] = me
;
1716 xtables_register_target(struct xtables_target
*me
)
1719 static struct xtables_target
**tmp
;
1721 if (!xext
.register_target
)
1722 xext
.register_target
= dlsym(RTLD_NEXT
, "xtables_register_target");
1724 if (!xext
.register_target
)
1727 xext
.register_target(me
);
1731 for (i
= 0; i
< xext
.tcount
; i
++)
1732 if (xext
.targets
[i
] == me
)
1735 tmp
= realloc(xext
.targets
, sizeof(me
) * (xext
.tcount
+ 1));
1741 xext
.targets
[xext
.tcount
++] = me
;