xtables: bootstrap ARP compatibility layer for nftables
This patch bootstraps ARP support for the compatibility layer:
1) copy original arptables code into xtables-arp.c
2) adapt it to fit into the existing nft infrastructure.
3) add the builtin table/chains for ARP.
4) add necessary parts so xtables-multi can provide xtables-arp.
5) add basic support for rule addition (-A), insertion (-I) and
listing (-L).
[ This was originally posted in a series of patches with interdependencies
that I have collapsed to leave the repository in consistent state. This
patch includes the following changes I made:
* Rename from xtables-arptables to xtables-arp, previous name too long.
* Remove nft-arptables.c, now we have one single nft-arp.c file. Moved
specific ARP functions to nft.c. Those should go away at some point as
some refactorization should allow to accomodate those functions to the
existing infrastructure.
* Fix --opcode Request/Reply, so we can do something useful with this
like dropping ARP request/replies.
--pablo ]
Signed-off-by: Giuseppe Longo <giuseppelng@gmail.com>
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
diff --git a/etc/xtables.conf b/etc/xtables.conf
index 7b2b8e5..d37b0d7 100644
--- a/etc/xtables.conf
+++ b/etc/xtables.conf
@@ -65,3 +65,11 @@
chain OUTPUT hook NF_INET_LOCAL_OUT prio 50
}
}
+
+family arp {
+ table filter {
+ chain INPUT hook NF_ARP_IN prio 0
+ chain FORWARD hook NF_ARP_FORWARD prio 0
+ chain OUTPUT hook NF_ARP_OUT prio 0
+ }
+}
\ No newline at end of file
diff --git a/iptables/Makefile.am b/iptables/Makefile.am
index 5cbd8ff..b9a9743 100644
--- a/iptables/Makefile.am
+++ b/iptables/Makefile.am
@@ -31,8 +31,9 @@
xtables_multi_SOURCES += xtables-config-parser.y xtables-config-syntax.l
xtables_multi_SOURCES += xtables-save.c xtables-restore.c \
xtables-standalone.c xtables.c nft.c \
- nft-shared.c nft-ipv4.c nft-ipv6.c \
- xtables-config.c xtables-events.c
+ nft-shared.c nft-ipv4.c nft-ipv6.c nft-arp.c \
+ xtables-config.c xtables-events.c \
+ xtables-arp-standalone.c xtables-arp.c
xtables_multi_LDADD += -lmnl -lnftables ${libmnl_LIBS} ${libnftables_LIBS}
xtables_multi_CFLAGS += -DENABLE_NFTABLES
# yacc and lex generate dirty code
@@ -57,7 +58,7 @@
endif
if ENABLE_NFTABLES
x_sbin_links = xtables xtables-restore xtables-save xtables-config \
- xtables-events
+ xtables-events xtables-arp
endif
iptables-extensions.8: iptables-extensions.8.tmpl ../extensions/matches.man ../extensions/targets.man
diff --git a/iptables/nft-arp.c b/iptables/nft-arp.c
new file mode 100644
index 0000000..09b939d
--- /dev/null
+++ b/iptables/nft-arp.c
@@ -0,0 +1,549 @@
+/*
+ * (C) 2013 by Giuseppe Longo <giuseppelng@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <netdb.h>
+#include <net/if_arp.h>
+
+#include <xtables.h>
+#include <net/if_arp.h>
+#include <if_ether.h>
+
+#include <linux/netfilter_arp/arp_tables.h>
+#include <linux/netfilter/nf_tables.h>
+
+#include "nft-shared.h"
+
+/* a few names */
+char *opcodes[] =
+{
+ "Request",
+ "Reply",
+ "Request_Reverse",
+ "Reply_Reverse",
+ "DRARP_Request",
+ "DRARP_Reply",
+ "DRARP_Error",
+ "InARP_Request",
+ "ARP_NAK",
+};
+
+static char *
+addr_to_dotted(const struct in_addr *addrp)
+{
+ static char buf[20];
+ const unsigned char *bytep;
+
+ bytep = (const unsigned char *) &(addrp->s_addr);
+ sprintf(buf, "%d.%d.%d.%d", bytep[0], bytep[1], bytep[2], bytep[3]);
+ return buf;
+}
+
+static char *
+addr_to_host(const struct in_addr *addr)
+{
+ struct hostent *host;
+
+ if ((host = gethostbyaddr((char *) addr,
+ sizeof(struct in_addr), AF_INET)) != NULL)
+ return (char *) host->h_name;
+
+ return (char *) NULL;
+}
+
+static char *
+addr_to_network(const struct in_addr *addr)
+{
+ struct netent *net;
+
+ if ((net = getnetbyaddr((long) ntohl(addr->s_addr), AF_INET)) != NULL)
+ return (char *) net->n_name;
+
+ return (char *) NULL;
+}
+
+static char *
+addr_to_anyname(const struct in_addr *addr)
+{
+ char *name;
+
+ if ((name = addr_to_host(addr)) != NULL ||
+ (name = addr_to_network(addr)) != NULL)
+ return name;
+
+ return addr_to_dotted(addr);
+}
+
+static char *
+mask_to_dotted(const struct in_addr *mask)
+{
+ int i;
+ static char buf[20];
+ u_int32_t maskaddr, bits;
+
+ maskaddr = ntohl(mask->s_addr);
+
+ if (maskaddr == 0xFFFFFFFFL)
+ /* we don't want to see "/32" */
+ return "";
+
+ i = 32;
+ bits = 0xFFFFFFFEL;
+ while (--i >= 0 && maskaddr != bits)
+ bits <<= 1;
+ if (i >= 0)
+ sprintf(buf, "/%d", i);
+ else
+ /* mask was not a decent combination of 1's and 0's */
+ sprintf(buf, "/%s", addr_to_dotted(mask));
+
+ return buf;
+}
+
+static void print_mac(const unsigned char *mac, int l)
+{
+ int j;
+
+ for (j = 0; j < l; j++)
+ printf("%02x%s", mac[j],
+ (j==l-1) ? "" : ":");
+}
+
+static void print_mac_and_mask(const unsigned char *mac, const unsigned char *mask, int l)
+{
+ int i;
+
+ print_mac(mac, l);
+ for (i = 0; i < l ; i++)
+ if (mask[i] != 255)
+ break;
+ if (i == l)
+ return;
+ printf("/");
+ print_mac(mask, l);
+}
+
+static uint8_t arpt_to_ipt_flags(uint16_t invflags)
+{
+ uint8_t result = 0;
+
+ if (invflags & ARPT_INV_VIA_IN)
+ result |= IPT_INV_VIA_IN;
+
+ if (invflags & ARPT_INV_VIA_OUT)
+ result |= IPT_INV_VIA_OUT;
+
+ if (invflags & ARPT_INV_SRCIP)
+ result |= IPT_INV_SRCIP;
+
+ if (invflags & ARPT_INV_TGTIP)
+ result |= IPT_INV_DSTIP;
+
+ if (invflags & ARPT_INV_ARPPRO)
+ result |= IPT_INV_PROTO;
+
+ if (invflags & ARPT_INV_MASK)
+ result |= IPT_INV_MASK;
+
+ return result;
+}
+
+static int nft_arp_add(struct nft_rule *r, void *data)
+{
+ struct arpt_entry *fw = data;
+ uint8_t flags = arpt_to_ipt_flags(fw->arp.invflags);
+
+ if (fw->arp.iniface[0] != '\0')
+ add_iniface(r, fw->arp.iniface, flags);
+
+ if (fw->arp.outiface[0] != '\0')
+ add_outiface(r, fw->arp.outiface, flags);
+
+ if (fw->arp.arhrd != 0) {
+ add_payload(r, offsetof(struct arphdr, ar_hrd), 2);
+ add_cmp_u16(r, fw->arp.arhrd, NFT_CMP_EQ);
+ }
+
+ if (fw->arp.arpro != 0) {
+ add_payload(r, offsetof(struct arphdr, ar_pro), 2);
+ add_cmp_u16(r, fw->arp.arpro, NFT_CMP_EQ);
+ }
+
+ if (fw->arp.arhln != 0)
+ add_proto(r, offsetof(struct arphdr, ar_hln), 1,
+ fw->arp.arhln, flags);
+
+ add_proto(r, offsetof(struct arphdr, ar_pln), 1, 4, 0);
+
+ if (fw->arp.arpop != 0) {
+ add_payload(r, offsetof(struct arphdr, ar_op), 2);
+ add_cmp_u16(r, fw->arp.arpop, NFT_CMP_EQ);
+ }
+
+ if (fw->arp.src_devaddr.addr[0] != '\0') {
+ add_payload(r, sizeof(struct arphdr), fw->arp.arhln);
+ add_cmp_ptr(r, NFT_CMP_EQ, fw->arp.src_devaddr.addr, fw->arp.arhln);
+ }
+
+ if (fw->arp.src.s_addr != 0)
+ add_addr(r, sizeof(struct arphdr) + fw->arp.arhln,
+ &fw->arp.src.s_addr, 4, flags);
+
+ if (fw->arp.tgt_devaddr.addr[0] != '\0') {
+ add_payload(r, sizeof(struct arphdr) + fw->arp.arhln + 4, fw->arp.arhln);
+ add_cmp_ptr(r, NFT_CMP_EQ, fw->arp.tgt_devaddr.addr, fw->arp.arhln);
+ }
+
+ if (fw->arp.tgt.s_addr != 0)
+ add_addr(r, sizeof(struct arphdr) + fw->arp.arhln + sizeof(struct in_addr),
+ &fw->arp.tgt.s_addr, 4, flags);
+
+ return 0;
+}
+
+static uint16_t ipt_to_arpt_flags(uint8_t invflags)
+{
+ uint16_t result = 0;
+
+ if (invflags & IPT_INV_VIA_IN)
+ result |= ARPT_INV_VIA_IN;
+
+ if (invflags & IPT_INV_VIA_OUT)
+ result |= ARPT_INV_VIA_OUT;
+
+ if (invflags & IPT_INV_SRCIP)
+ result |= ARPT_INV_SRCIP;
+
+ if (invflags & IPT_INV_DSTIP)
+ result |= ARPT_INV_TGTIP;
+
+ if (invflags & IPT_INV_PROTO)
+ result |= ARPT_INV_ARPPRO;
+
+ if (invflags & IPT_INV_MASK)
+ result |= ARPT_INV_MASK;
+
+ return result;
+}
+
+static void nft_arp_parse_meta(struct nft_rule_expr *e, uint8_t key,
+ void *data)
+{
+ struct arpt_entry *fw = data;
+ uint8_t flags;
+
+ parse_meta(e, key, fw->arp.iniface, fw->arp.iniface_mask,
+ fw->arp.outiface, fw->arp.outiface_mask,
+ &flags);
+
+ fw->arp.invflags |= ipt_to_arpt_flags(flags);
+}
+
+static void nft_arp_parse_target(struct xtables_target *t, void *data)
+{
+ struct arpt_entry *fw = data;
+ size_t size = sizeof(struct arpt_entry);
+ struct xt_entry_target **target;
+
+ fw->target_offset = size;
+ fw->next_offset = size + t->t->u.target_size;
+
+ target = (void *) fw + fw->target_offset;
+ *target = t->t;
+}
+
+static void nft_arp_parse_immediate(const char *jumpto, bool nft_goto,
+ void *data)
+{
+ struct xtables_target *target;
+ size_t size;
+
+ target = xtables_find_target(XT_STANDARD_TARGET,
+ XTF_LOAD_MUST_SUCCEED);
+ size = sizeof(struct xt_entry_target) + target->size;
+ target->t = xtables_calloc(1, size);
+ target->t->u.target_size = size;
+ strcpy(target->t->u.user.name, jumpto);
+
+ nft_arp_parse_target(target, data);
+}
+
+static void nft_arp_parse_payload(struct nft_rule_expr_iter *iter,
+ uint32_t offset, void *data)
+{
+ struct arpt_entry *fw = data;
+ struct in_addr addr;
+ unsigned short int ar_hrd, ar_pro, ar_op, ar_hln;
+ bool inv;
+
+ switch (offset) {
+ case offsetof(struct arphdr, ar_hrd):
+ get_cmp_data(iter, &ar_hrd, sizeof(ar_hrd), &inv);
+ fw->arp.arhrd = htons(ar_hrd);
+ fw->arp.arhrd_mask = htons(0xffff);
+ if (inv)
+ fw->arp.invflags |= ARPT_INV_ARPHRD;
+ break;
+ case offsetof(struct arphdr, ar_pro):
+ get_cmp_data(iter, &ar_pro, sizeof(ar_pro), &inv);
+ fw->arp.arpro = htons(ar_pro);
+ fw->arp.arpro_mask = htons(0xffff);
+ if (inv)
+ fw->arp.invflags |= ARPT_INV_ARPPRO;
+ break;
+ case offsetof(struct arphdr, ar_op):
+ get_cmp_data(iter, &ar_op, sizeof(ar_op), &inv);
+ fw->arp.arpop = htons(ar_op);
+ fw->arp.arpop_mask = htons(0xffff);
+ if (inv)
+ fw->arp.invflags |= ARPT_INV_ARPOP;
+ break;
+ case offsetof(struct arphdr, ar_hln):
+ get_cmp_data(iter, &ar_hln, sizeof(ar_op), &inv);
+ fw->arp.arhln = ar_hln;
+ fw->arp.arhln_mask = 0xff;
+ if (inv)
+ fw->arp.invflags |= ARPT_INV_ARPOP;
+ break;
+ default:
+ if (!fw->arp.arhln)
+ break;
+
+ if (offset == sizeof(struct arphdr) + fw->arp.arhln) {
+ get_cmp_data(iter, &addr, sizeof(addr), &inv);
+ fw->arp.src.s_addr = addr.s_addr;
+ fw->arp.smsk.s_addr = 0xffffffff;
+ if (inv)
+ fw->arp.invflags |= ARPT_INV_SRCIP;
+ } else if (offset == sizeof(struct arphdr) + fw->arp.arhln + sizeof(struct in_addr)) {
+ get_cmp_data(iter, &addr, sizeof(addr), &inv);
+ fw->arp.tgt.s_addr = addr.s_addr;
+ fw->arp.tmsk.s_addr = 0xffffffff;
+ if (inv)
+ fw->arp.invflags |= ARPT_INV_TGTIP;
+ }
+ break;
+ }
+}
+
+static void nft_rule_to_arpt_entry(struct nft_rule *r, struct arpt_entry *fw)
+{
+ struct nft_rule_expr_iter *iter;
+ struct nft_rule_expr *expr;
+ int family = nft_rule_attr_get_u8(r, NFT_RULE_ATTR_FAMILY);
+
+ iter = nft_rule_expr_iter_create(r);
+ if (iter == NULL)
+ return;
+
+ expr = nft_rule_expr_iter_next(iter);
+ while (expr != NULL) {
+ const char *name =
+ nft_rule_expr_get_str(expr, NFT_RULE_EXPR_ATTR_NAME);
+
+ if (strcmp(name, "counter") == 0)
+ nft_parse_counter(expr, iter, &fw->counters);
+ else if (strcmp(name, "payload") == 0)
+ nft_parse_payload(expr, iter, family, fw);
+ else if (strcmp(name, "meta") == 0)
+ nft_parse_meta(expr, iter, family, fw);
+ else if (strcmp(name, "immediate") == 0)
+ nft_parse_immediate(expr, iter, family, fw);
+ else if (strcmp(name, "target") == 0)
+ nft_parse_target(expr, iter, family, fw);
+
+ expr = nft_rule_expr_iter_next(iter);
+ }
+
+ nft_rule_expr_iter_destroy(iter);
+}
+
+static void
+nft_arp_print_firewall(struct nft_rule *r, unsigned int num,
+ unsigned int format)
+{
+ struct arpt_entry fw = {};
+ const char *targname;
+ struct xtables_target *target = NULL;
+ const struct xt_entry_target *t;
+ char buf[BUFSIZ];
+ int i;
+ char iface[IFNAMSIZ+2];
+ int print_iface = 0;
+
+ nft_rule_to_arpt_entry(r, &fw);
+
+ if (format & FMT_LINENUMBERS)
+ printf("%u ", num);
+
+ if (fw.target_offset) {
+ t = nft_arp_get_target(&fw);
+ targname = t->u.user.name;
+ target = xtables_find_target(targname, XTF_TRY_LOAD);
+ if (!(format & FMT_NOTARGET))
+ printf("-j %s ", targname);
+ }
+
+ iface[0] = '\0';
+
+ if (fw.arp.iniface[0] != '\0') {
+ strcat(iface, fw.arp.iniface);
+ print_iface = 1;
+ }
+ else if (format & FMT_VIA) {
+ print_iface = 1;
+ if (format & FMT_NUMERIC) strcat(iface, "*");
+ else strcat(iface, "any");
+ }
+ if (print_iface)
+ printf("%s-i %s ", fw.arp.invflags & ARPT_INV_VIA_IN ? "! ": "", iface);
+
+ print_iface = 0;
+ iface[0] = '\0';
+
+ if (fw.arp.outiface[0] != '\0') {
+ strcat(iface, fw.arp.outiface);
+ print_iface = 1;
+ }
+ else if (format & FMT_VIA) {
+ print_iface = 1;
+ if (format & FMT_NUMERIC) strcat(iface, "*");
+ else strcat(iface, "any");
+ }
+ if (print_iface)
+ printf("%s-o %s ", fw.arp.invflags & ARPT_INV_VIA_OUT ? "! " : "", iface);
+
+ if (fw.arp.smsk.s_addr != 0L) {
+ printf("%s", fw.arp.invflags & ARPT_INV_SRCIP
+ ? "! " : "");
+ if (format & FMT_NUMERIC)
+ sprintf(buf, "%s", addr_to_dotted(&(fw.arp.src)));
+ else
+ sprintf(buf, "%s", addr_to_anyname(&(fw.arp.src)));
+ strcat(buf, mask_to_dotted(&(fw.arp.smsk)));
+ printf("-s %s ", buf);
+ }
+
+ for (i = 0; i < ARPT_DEV_ADDR_LEN_MAX; i++)
+ if (fw.arp.src_devaddr.mask[i] != 0)
+ break;
+ if (i == ARPT_DEV_ADDR_LEN_MAX)
+ goto after_devsrc;
+ printf("%s", fw.arp.invflags & ARPT_INV_SRCDEVADDR
+ ? "! " : "");
+ printf("--src-mac ");
+ print_mac_and_mask((unsigned char *)fw.arp.src_devaddr.addr,
+ (unsigned char *)fw.arp.src_devaddr.mask, ETH_ALEN);
+ printf(" ");
+after_devsrc:
+
+ if (fw.arp.tmsk.s_addr != 0L) {
+ printf("%s",fw.arp.invflags & ARPT_INV_TGTIP
+ ? "! " : "");
+ if (format & FMT_NUMERIC)
+ sprintf(buf, "%s", addr_to_dotted(&(fw.arp.tgt)));
+ else
+ sprintf(buf, "%s", addr_to_anyname(&(fw.arp.tgt)));
+ strcat(buf, mask_to_dotted(&(fw.arp.tmsk)));
+ printf("-d %s ", buf);
+ }
+
+ for (i = 0; i <ARPT_DEV_ADDR_LEN_MAX; i++)
+ if (fw.arp.tgt_devaddr.mask[i] != 0)
+ break;
+ if (i == ARPT_DEV_ADDR_LEN_MAX)
+ goto after_devdst;
+ printf("%s",fw.arp.invflags & ARPT_INV_TGTDEVADDR
+ ? "! " : "");
+ printf("--dst-mac ");
+ print_mac_and_mask((unsigned char *)fw.arp.tgt_devaddr.addr,
+ (unsigned char *)fw.arp.tgt_devaddr.mask, ETH_ALEN);
+ printf(" ");
+after_devdst:
+
+ if (fw.arp.arhln_mask != 0) {
+ printf("%s",fw.arp.invflags & ARPT_INV_ARPHLN
+ ? "! " : "");
+ printf("--h-length %d", fw.arp.arhln);
+ if (fw.arp.arhln_mask != 255)
+ printf("/%d", fw.arp.arhln_mask);
+ printf(" ");
+ }
+
+ if (fw.arp.arpop_mask != 0) {
+ int tmp = ntohs(fw.arp.arpop);
+
+ printf("%s",fw.arp.invflags & ARPT_INV_ARPOP
+ ? "! " : "");
+ if (tmp <= NUMOPCODES && !(format & FMT_NUMERIC))
+ printf("--opcode %s", opcodes[tmp-1]);
+ else
+ printf("--opcode %d", tmp);
+ if (fw.arp.arpop_mask != 65535)
+ printf("/%d", ntohs(fw.arp.arpop_mask));
+ printf(" ");
+ }
+
+ if (fw.arp.arhrd_mask != 0) {
+ uint16_t tmp = ntohs(fw.arp.arhrd);
+
+ printf("%s", fw.arp.invflags & ARPT_INV_ARPHRD
+ ? "! " : "");
+ if (tmp == 1 && !(format & FMT_NUMERIC))
+ printf("--h-type %s", "Ethernet");
+ else
+ printf("--h-type %u", tmp);
+ if (fw.arp.arhrd_mask != 65535)
+ printf("/%d", ntohs(fw.arp.arhrd_mask));
+ printf(" ");
+ }
+
+ if (fw.arp.arpro_mask != 0) {
+ int tmp = ntohs(fw.arp.arpro);
+
+ printf("%s", fw.arp.invflags & ARPT_INV_ARPPRO
+ ? "! " : "");
+ if (tmp == 0x0800 && !(format & FMT_NUMERIC))
+ printf("--proto-type %s", "IPv4");
+ else
+ printf("--proto-type 0x%x", tmp);
+ if (fw.arp.arpro_mask != 65535)
+ printf("/%x", ntohs(fw.arp.arpro_mask));
+ printf(" ");
+ }
+
+ if (target) {
+ if (target->print)
+ /* Print the target information. */
+ target->print(&fw.arp, t, format & FMT_NUMERIC);
+ }
+
+ if (!(format & FMT_NOCOUNTS)) {
+ printf(", pcnt=");
+ xtables_print_num(fw.counters.pcnt, format);
+ printf("-- bcnt=");
+ xtables_print_num(fw.counters.bcnt, format);
+ }
+
+ if (!(format & FMT_NONEWLINE))
+ fputc('\n', stdout);
+}
+
+struct nft_family_ops nft_family_ops_arp = {
+ .add = nft_arp_add,
+ .is_same = NULL,
+ .print_payload = NULL,
+ .parse_meta = nft_arp_parse_meta,
+ .parse_payload = nft_arp_parse_payload,
+ .parse_immediate = nft_arp_parse_immediate,
+ .print_firewall = nft_arp_print_firewall,
+ .post_parse = NULL,
+};
diff --git a/iptables/nft-shared.c b/iptables/nft-shared.c
index 5681e26..c1cb5a7 100644
--- a/iptables/nft-shared.c
+++ b/iptables/nft-shared.c
@@ -30,6 +30,7 @@
extern struct nft_family_ops nft_family_ops_ipv4;
extern struct nft_family_ops nft_family_ops_ipv6;
+extern struct nft_family_ops nft_family_ops_arp;
void add_meta(struct nft_rule *r, uint32_t key)
{
@@ -281,8 +282,7 @@
}
}
-static void
-nft_parse_target(struct nft_rule_expr *e, struct nft_rule_expr_iter *iter,
+void nft_parse_target(struct nft_rule_expr *e, struct nft_rule_expr_iter *iter,
int family, void *data)
{
size_t tg_len;
@@ -381,7 +381,7 @@
*inv = false;
}
-static void
+void
nft_parse_meta(struct nft_rule_expr *e, struct nft_rule_expr_iter *iter,
int family, void *data)
{
@@ -402,7 +402,7 @@
ops->parse_meta(e, key, data);
}
-static void
+void
nft_parse_payload(struct nft_rule_expr *e, struct nft_rule_expr_iter *iter,
int family, void *data)
{
@@ -414,7 +414,7 @@
ops->parse_payload(iter, offset, data);
}
-static void
+void
nft_parse_counter(struct nft_rule_expr *e, struct nft_rule_expr_iter *iter,
struct xt_counters *counters)
{
@@ -422,7 +422,7 @@
counters->bcnt = nft_rule_expr_get_u64(e, NFT_EXPR_CTR_BYTES);
}
-static void
+void
nft_parse_immediate(struct nft_rule_expr *e, struct nft_rule_expr_iter *iter,
int family, void *data)
{
@@ -649,6 +649,8 @@
return &nft_family_ops_ipv4;
case AF_INET6:
return &nft_family_ops_ipv6;
+ case NFPROTO_ARP:
+ return &nft_family_ops_arp;
default:
break;
}
diff --git a/iptables/nft-shared.h b/iptables/nft-shared.h
index 3f1a9a4..375c714 100644
--- a/iptables/nft-shared.h
+++ b/iptables/nft-shared.h
@@ -84,6 +84,19 @@
void print_proto(uint16_t proto, int invert);
void get_cmp_data(struct nft_rule_expr_iter *iter,
void *data, size_t dlen, bool *inv);
+void nft_parse_target(struct nft_rule_expr *e, struct nft_rule_expr_iter *iter,
+ int family, void *data);
+void nft_parse_meta(struct nft_rule_expr *e, struct nft_rule_expr_iter *iter,
+ int family, void *data);
+void nft_parse_payload(struct nft_rule_expr *e,
+ struct nft_rule_expr_iter *iter,
+ int family, void *data);
+void nft_parse_counter(struct nft_rule_expr *e,
+ struct nft_rule_expr_iter *iter,
+ struct xt_counters *counters);
+void nft_parse_immediate(struct nft_rule_expr *e,
+ struct nft_rule_expr_iter *iter,
+ int family, void *data);
void nft_rule_to_iptables_command_state(struct nft_rule *r,
struct iptables_command_state *cs);
void print_firewall_details(const struct iptables_command_state *cs,
@@ -149,4 +162,21 @@
#define CMD_ZERO_NUM 0x2000U
#define CMD_CHECK 0x4000U
+/*
+ * ARP
+ */
+extern char *opcodes[];
+#define NUMOPCODES 9
+
+#include <linux/netfilter_arp/arp_tables.h>
+
+static inline struct xt_entry_target *nft_arp_get_target(struct arpt_entry *fw)
+{
+ struct xt_entry_target **target;
+
+ target = (void *) fw + fw->target_offset;
+
+ return *target;
+}
+
#endif
diff --git a/iptables/nft.c b/iptables/nft.c
index 49d345d..28c5473 100644
--- a/iptables/nft.c
+++ b/iptables/nft.c
@@ -53,9 +53,9 @@
static void *nft_fn;
-static int mnl_talk(struct nft_handle *h, struct nlmsghdr *nlh,
- int (*cb)(const struct nlmsghdr *nlh, void *data),
- void *data)
+int mnl_talk(struct nft_handle *h, struct nlmsghdr *nlh,
+ int (*cb)(const struct nlmsghdr *nlh, void *data),
+ void *data)
{
int ret;
char buf[MNL_SOCKET_BUFFER_SIZE];
@@ -210,7 +210,35 @@
},
};
-static int
+#include <linux/netfilter_arp.h>
+
+struct builtin_table xtables_arp[TABLES_MAX] = {
+ [FILTER] = {
+ .name = "filter",
+ .chains = {
+ {
+ .name = "INPUT",
+ .type = "filter",
+ .prio = NF_IP_PRI_FILTER,
+ .hook = NF_ARP_IN,
+ },
+ {
+ .name = "FORWARD",
+ .type = "filter",
+ .prio = NF_IP_PRI_FILTER,
+ .hook = NF_ARP_FORWARD,
+ },
+ {
+ .name = "OUTPUT",
+ .type = "filter",
+ .prio = NF_IP_PRI_FILTER,
+ .hook = NF_ARP_OUT,
+ },
+ },
+ },
+};
+
+int
nft_table_builtin_add(struct nft_handle *h, struct builtin_table *_t,
bool dormant)
{
@@ -242,7 +270,7 @@
return ret;
}
-static struct nft_chain *
+struct nft_chain *
nft_chain_builtin_alloc(struct builtin_table *table,
struct builtin_chain *chain, int policy)
{
@@ -262,7 +290,7 @@
return c;
}
-static void
+void
nft_chain_builtin_add(struct nft_handle *h, struct builtin_table *table,
struct builtin_chain *chain, int policy)
{
@@ -288,8 +316,8 @@
}
/* find if built-in table already exists */
-static struct builtin_table
-*nft_table_builtin_find(struct nft_handle *h, const char *table)
+struct builtin_table *
+nft_table_builtin_find(struct nft_handle *h, const char *table)
{
int i;
bool found = false;
@@ -309,7 +337,7 @@
}
/* find if built-in chain already exists */
-static struct builtin_chain *
+struct builtin_chain *
nft_chain_builtin_find(struct builtin_table *t, const char *chain)
{
int i;
@@ -346,7 +374,7 @@
}
}
-static int
+int
nft_chain_builtin_init(struct nft_handle *h, const char *table,
const char *chain, int policy)
{
@@ -597,7 +625,7 @@
return 0;
}
-static int add_target(struct nft_rule *r, struct xt_entry_target *t)
+int add_target(struct nft_rule *r, struct xt_entry_target *t)
{
struct nft_rule_expr *expr;
int ret;
@@ -612,7 +640,7 @@
return ret;
}
-static int add_jumpto(struct nft_rule *r, const char *name, int verdict)
+int add_jumpto(struct nft_rule *r, const char *name, int verdict)
{
struct nft_rule_expr *expr;
@@ -628,7 +656,7 @@
return 0;
}
-static int add_verdict(struct nft_rule *r, int verdict)
+int add_verdict(struct nft_rule *r, int verdict)
{
struct nft_rule_expr *expr;
@@ -654,7 +682,7 @@
#endif
}
-static int add_counters(struct nft_rule *r, uint64_t packets, uint64_t bytes)
+int add_counters(struct nft_rule *r, uint64_t packets, uint64_t bytes)
{
struct nft_rule_expr *expr;
@@ -1533,12 +1561,12 @@
perror("mnl_talk:nft_rule_del");
}
-static struct nft_rule_list *nft_rule_list_create(struct nft_handle *h)
+struct nft_rule_list *nft_rule_list_create(struct nft_handle *h)
{
return nft_rule_list_get(h);
}
-static void nft_rule_list_destroy(struct nft_rule_list *list)
+void nft_rule_list_destroy(struct nft_rule_list *list)
{
nft_rule_list_free(list);
}
@@ -2443,3 +2471,246 @@
return ret == 0 ? 1 : 0;
}
+/*
+ * XXX These are almost copy and paste of the original functions, but adapted
+ * to ARP. These functions should go away with some refactoring of the
+ * existing infrastructure.
+ */
+static struct nft_rule *
+nft_arp_rule_new(struct nft_handle *h, const char *chain, const char *table,
+ struct arpt_entry *fw)
+{
+ struct xt_entry_target *t;
+ char *targname;
+ struct nft_rule *r;
+ int ret = 0;
+
+ t = nft_arp_get_target(fw);
+ targname = t->u.user.name;
+
+ r = nft_rule_alloc();
+ if (r == NULL)
+ return NULL;
+
+ nft_rule_attr_set_u32(r, NFT_RULE_ATTR_FAMILY, h->family);
+ nft_rule_attr_set(r, NFT_RULE_ATTR_TABLE, (char *)table);
+ nft_rule_attr_set(r, NFT_RULE_ATTR_CHAIN, (char *)chain);
+
+ h->ops->add(r, fw);
+
+ /* Counters need to me added before the target, otherwise they are
+ * increased for each rule because of the way nf_tables works.
+ */
+ if (add_counters(r, fw->counters.pcnt, fw->counters.bcnt) < 0)
+ goto err;
+
+ /* Standard target? */
+ if (strcmp(targname, XTC_LABEL_ACCEPT) == 0)
+ ret = add_verdict(r, NF_ACCEPT);
+ else if (strcmp(targname, XTC_LABEL_DROP) == 0)
+ ret = add_verdict(r, NF_DROP);
+ else if (strcmp(targname, XTC_LABEL_RETURN) == 0)
+ ret = add_verdict(r, NFT_RETURN);
+ else if (xtables_find_target(targname, XTF_TRY_LOAD) != NULL)
+ ret = add_target(r, t);
+ else
+ ret = add_jumpto(r, targname, NFT_JUMP);
+
+ if (ret < 0)
+ goto err;
+
+ return r;
+err:
+ nft_rule_free(r);
+ return NULL;
+
+}
+
+static void
+nft_arp_rule_print_debug(struct nft_rule *r, struct nlmsghdr *nlh) {
+#ifdef NLDEBUG
+ char tmp[1024];
+
+ nft_rule_snprintf(tmp, sizeof(tmp), r, 0, 0);
+ printf("DEBUG: rule: %s", tmp);
+ mnl_nlmsg_fprintf(stdout, nlh, nlh->nlmsg_len, sizeof(struct nfgenmsg));
+#endif
+}
+
+static int
+nft_arp_rule_add(struct nft_handle *h, const char *chain,
+ const char *table, struct arpt_entry *fw,
+ uint64_t handle, bool verbose)
+{
+ char buf[MNL_SOCKET_BUFFER_SIZE];
+ struct nlmsghdr *nlh;
+ struct nft_rule *r;
+ int ret = 1;
+
+ r = nft_arp_rule_new(h, chain, table, fw);
+ if (r == NULL) {
+ ret = 0;
+ goto err;
+ }
+ if (handle > 0)
+ nft_rule_attr_set_u64(r, NFT_RULE_ATTR_POSITION, handle);
+
+ if (h->commit) {
+ nft_rule_attr_set_u32(r, NFT_RULE_ATTR_FLAGS,
+ NFT_RULE_F_COMMIT);
+ }
+
+ nlh = nft_rule_nlmsg_build_hdr(buf, NFT_MSG_NEWRULE, h->family,
+ NLM_F_ACK|NLM_F_CREATE, h->seq);
+ nft_rule_nlmsg_build_payload(nlh, r);
+ nft_arp_rule_print_debug(r, nlh);
+ nft_rule_free(r);
+
+ ret = mnl_talk(h, nlh, NULL, NULL);
+ if (ret < 0)
+ perror("mnl_talk:nft_arp_rule_add");
+
+err:
+ /* the core expects 1 for success and 0 for error */
+ return ret == 0 ? 1 : 0;
+}
+
+int nft_arp_rule_append(struct nft_handle *h, const char *chain,
+ const char *table, struct arpt_entry *fw, bool verbose)
+{
+ char buf[MNL_SOCKET_BUFFER_SIZE];
+ struct nlmsghdr *nlh;
+ struct nft_rule *r;
+ uint16_t flags = NLM_F_ACK|NLM_F_CREATE;
+ int ret = 1;
+
+ /* If built-in chains don't exist for this table, create them */
+ if (nft_xtables_config_load(h, XTABLES_CONFIG_DEFAULT, 0) < 0)
+ nft_chain_builtin_init(h, table, chain, NF_ACCEPT);
+
+ nft_fn = nft_arp_rule_append;
+
+ r = nft_arp_rule_new(h, chain, table, fw);
+ if (r == NULL) {
+ ret = 0;
+ goto err;
+ }
+
+ /*if (handle > 0) {
+ nft_rule_attr_set(r, NFT_RULE_ATTR_HANDLE, &handle);
+ flags |= NLM_F_REPLACE;
+ } else
+ flags |= NLM_F_APPEND;*/
+
+ flags |= NLM_F_APPEND;
+
+ if (h->commit) {
+ nft_rule_attr_set_u32(r, NFT_RULE_ATTR_FLAGS,
+ NFT_RULE_F_COMMIT);
+ }
+
+ nlh = nft_rule_nlmsg_build_hdr(buf, NFT_MSG_NEWRULE, h->family,
+ flags, h->seq);
+ nft_rule_nlmsg_build_payload(nlh, r);
+ nft_arp_rule_print_debug(r, nlh);
+ nft_rule_free(r);
+
+ ret = mnl_talk(h, nlh, NULL, NULL);
+ if (ret < 0)
+ perror("mnl_talk:nft_arp_rule_append");
+
+err:
+ /* the core expects 1 for success and 0 for error */
+ return ret == 0 ? 1 : 0;
+}
+
+static struct nft_rule *
+nft_arp_rule_find(struct nft_rule_list *list, const char *chain,
+ const char *table, struct arpt_entry *fw, int rulenum)
+{
+ struct nft_rule *r;
+ struct nft_rule_list_iter *iter;
+ int rule_ctr = 0;
+ bool found = false;
+
+ iter = nft_rule_list_iter_create(list);
+ if (iter == NULL)
+ return 0;
+
+ r = nft_rule_list_iter_next(iter);
+ while (r != NULL) {
+ const char *rule_table =
+ nft_rule_attr_get_str(r, NFT_RULE_ATTR_TABLE);
+ const char *rule_chain =
+ nft_rule_attr_get_str(r, NFT_RULE_ATTR_CHAIN);
+ const struct nft_family_ops *ops = nft_family_ops_lookup(
+ nft_rule_attr_get_u8(r, NFT_RULE_ATTR_FAMILY));
+ struct arpt_entry this = {};
+
+ if (strcmp(table, rule_table) != 0 ||
+ strcmp(chain, rule_chain) != 0) {
+ DEBUGP("different chain / table\n");
+ goto next;
+ }
+
+ if (rulenum >= 0) {
+ /* Delete by rule number case */
+ if (rule_ctr != rulenum)
+ goto next;
+ found = true;
+ break;
+ } else {
+ /* Delete by matching rule case */
+ nft_rule_to_arpt_entry(r, &this);
+
+ DEBUGP("comparing with... ");
+
+ found = true;
+ break;
+ }
+next:
+ rule_ctr++;
+ r = nft_rule_list_iter_next(iter);
+ }
+
+ nft_rule_list_iter_destroy(iter);
+
+ return found ? r : NULL;
+}
+
+int nft_arp_rule_insert(struct nft_handle *h, const char *chain,
+ const char *table, struct arpt_entry *fw,
+ int rulenum, bool verbose)
+{
+ struct nft_rule_list *list;
+ struct nft_rule *r;
+ uint64_t handle = 0;
+
+ /* If built-in chains don't exist for this table, create them */
+ if (nft_xtables_config_load(h, XTABLES_CONFIG_DEFAULT, 0) < 0)
+ nft_chain_builtin_init(h, table, chain, NF_ACCEPT);
+
+ nft_fn = nft_arp_rule_insert;
+
+ if (rulenum > 0) {
+ list = nft_rule_list_create(h);
+ if (list == NULL)
+ goto err;
+
+ r = nft_arp_rule_find(list, chain, table, fw, rulenum);
+ if (r == NULL) {
+ errno = ENOENT;
+ goto err;
+ }
+
+ handle = nft_rule_attr_get_u64(r, NFT_RULE_ATTR_HANDLE);
+ DEBUGP("adding after rule handle %"PRIu64"\n", handle);
+
+ nft_rule_list_destroy(list);
+ }
+
+ return nft_arp_rule_add(h, chain, table, fw, handle, verbose);
+err:
+ nft_rule_list_destroy(list);
+ return 0;
+}
diff --git a/iptables/nft.h b/iptables/nft.h
index fe1b9c8..25275ce 100644
--- a/iptables/nft.h
+++ b/iptables/nft.h
@@ -34,7 +34,11 @@
};
extern struct builtin_table xtables_ipv4[TABLES_MAX];
+extern struct builtin_table xtables_arp[TABLES_MAX];
+int mnl_talk(struct nft_handle *h, struct nlmsghdr *nlh,
+ int (*cb)(const struct nlmsghdr *nlh, void *data),
+ void *data);
int nft_init(struct nft_handle *h, struct builtin_table *t);
void nft_fini(struct nft_handle *h);
@@ -44,6 +48,8 @@
struct nft_table;
struct nft_chain_list;
+int nft_table_builtin_add(struct nft_handle *h, struct builtin_table *_t, bool dormant);
+struct builtin_table *nft_table_builtin_find(struct nft_handle *h, const char *table);
int nft_table_add(struct nft_handle *h, const struct nft_table *t);
int nft_for_each_table(struct nft_handle *h, int (*func)(struct nft_handle *h, const char *tablename, bool counters), bool counters);
bool nft_table_find(struct nft_handle *h, const char *tablename);
@@ -56,6 +62,10 @@
*/
struct nft_chain;
+struct nft_chain *nft_chain_builtin_alloc(struct builtin_table *table, struct builtin_chain *chain, int policy);
+void nft_chain_builtin_add(struct nft_handle *h, struct builtin_table *table, struct builtin_chain *chain, int policy);
+struct builtin_chain *nft_chain_builtin_find(struct builtin_table *t, const char *chain);
+int nft_chain_builtin_init(struct nft_handle *h, const char *table, const char *chain, int policy);
int nft_chain_add(struct nft_handle *h, const struct nft_chain *c);
int nft_chain_set(struct nft_handle *h, const char *table, const char *chain, const char *policy, const struct xt_counters *counters);
struct nft_chain_list *nft_chain_dump(struct nft_handle *h);
@@ -82,6 +92,16 @@
int nft_rule_save(struct nft_handle *h, const char *table, bool counters);
int nft_rule_flush(struct nft_handle *h, const char *chain, const char *table);
int nft_rule_zero_counters(struct nft_handle *h, const char *chain, const char *table, int rulenum);
+struct nft_rule_list *nft_rule_list_create(struct nft_handle *h);
+void nft_rule_list_destroy(struct nft_rule_list *list);
+
+/*
+ * Operations used in userspace tools
+ */
+int add_counters(struct nft_rule *r, uint64_t packets, uint64_t bytes);
+int add_verdict(struct nft_rule *r, int verdict);
+int add_target(struct nft_rule *r, struct xt_entry_target *t);
+int add_jumpto(struct nft_rule *r, const char *name, int verdict);
enum nft_rule_print {
NFT_RULE_APPEND,
@@ -110,6 +130,8 @@
/* For xtables.c */
int do_commandx(struct nft_handle *h, int argc, char *argv[], char **table);
+/* For xtables-arptables.c */
+int do_commandarp(struct nft_handle *h, int argc, char *argv[], char **table);
/*
* Parse config for tables and chain helper functions
@@ -127,4 +149,17 @@
int nft_xtables_config_load(struct nft_handle *h, const char *filename, uint32_t flags);
+/*
+ * ARP
+ */
+
+struct arpt_entry;
+
+int nft_arp_rule_append(struct nft_handle *h, const char *chain,
+ const char *table, struct arpt_entry *fw,
+ bool verbose);
+int nft_arp_rule_insert(struct nft_handle *h, const char *chain,
+ const char *table, struct arpt_entry *fw,
+ int rulenum, bool verbose);
+
#endif
diff --git a/iptables/xtables-arp-standalone.c b/iptables/xtables-arp-standalone.c
new file mode 100644
index 0000000..186c9a1
--- /dev/null
+++ b/iptables/xtables-arp-standalone.c
@@ -0,0 +1,86 @@
+/*
+ * Author: Paul.Russell@rustcorp.com.au and mneuling@radlogic.com.au
+ *
+ * Based on the ipchains code by Paul Russell and Michael Neuling
+ *
+ * (C) 2000-2002 by the netfilter coreteam <coreteam@netfilter.org>:
+ * Paul 'Rusty' Russell <rusty@rustcorp.com.au>
+ * Marc Boucher <marc+nf@mbsi.ca>
+ * James Morris <jmorris@intercode.com.au>
+ * Harald Welte <laforge@gnumonks.org>
+ * Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
+ *
+ * arptables -- IP firewall administration for kernels with
+ * firewall table (aimed for the 2.3 kernels)
+ *
+ * See the accompanying manual page arptables(8) for information
+ * about proper usage of this program.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <xtables.h>
+#include "nft.h"
+#include <linux/netfilter_arp/arp_tables.h>
+
+#include "xtables-multi.h"
+
+extern struct xtables_globals xtables_globals;
+extern const char *program_version, *program_name;
+
+static const struct xtables_afinfo afinfo_arp = {
+ .kmod = "arp_tables",
+ .proc_exists = "/proc/net/arp_tables_names",
+ .libprefix = "libarp_",
+ .family = NFPROTO_ARP,
+ .ipproto = IPPROTO_IP,
+ .so_rev_match = -1,
+ .so_rev_target = -1,
+};
+
+int xtables_arp_main(int argc, char *argv[])
+{
+ int ret;
+ char *table = "filter";
+ struct nft_handle h = {
+ .family = NFPROTO_ARP,
+ };
+
+ xtables_globals.program_name = "xtables-arp";
+ /* This code below could be replaced by xtables_init_all, which
+ * doesn't support NFPROTO_ARP yet.
+ */
+ xtables_init();
+ afinfo = &afinfo_arp;
+ ret = xtables_set_params(&xtables_globals);
+ if (ret < 0) {
+ fprintf(stderr, "%s/%s Failed to initialize xtables\n",
+ xtables_globals.program_name,
+ xtables_globals.program_version);
+ exit(1);
+ }
+
+#if defined(ALL_INCLUSIVE) || defined(NO_SHARED_LIBS)
+ init_extensions();
+#endif
+
+ ret = do_commandarp(&h, argc, argv, &table);
+
+ exit(!ret);
+}
diff --git a/iptables/xtables-arp.c b/iptables/xtables-arp.c
new file mode 100644
index 0000000..68687c0
--- /dev/null
+++ b/iptables/xtables-arp.c
@@ -0,0 +1,1457 @@
+/* Code to take an arptables-style command line and do it. */
+
+/*
+ * arptables:
+ * Author: Bart De Schuymer <bdschuym@pandora.be>, but
+ * almost all code is from the iptables userspace program, which has main
+ * authors: Paul.Russell@rustcorp.com.au and mneuling@radlogic.com.au
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/*
+ Currently, only support for specifying hardware addresses for Ethernet
+ is available.
+ This tool is not luser-proof: you can specify an Ethernet source address
+ and set hardware length to something different than 6, f.e.
+*/
+
+#include <getopt.h>
+#include <string.h>
+#include <netdb.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <inttypes.h>
+#include <dlfcn.h>
+#include <ctype.h>
+#include <stdarg.h>
+#include <limits.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/wait.h>
+#include <net/if.h>
+#include <netinet/ether.h>
+#include <xtables.h>
+
+#include "xshared.h"
+
+#include "nft.h"
+#include <linux/netfilter_arp/arp_tables.h>
+
+typedef char arpt_chainlabel[32];
+
+#ifndef TRUE
+#define TRUE 1
+#endif
+#ifndef FALSE
+#define FALSE 0
+#endif
+
+/* XXX: command defined by nft-shared.h do not overlap with these two */
+#undef CMD_CHECK
+#undef CMD_RENAME_CHAIN
+
+#define CMD_NONE 0x0000U
+#define CMD_INSERT 0x0001U
+#define CMD_DELETE 0x0002U
+#define CMD_DELETE_NUM 0x0004U
+#define CMD_REPLACE 0x0008U
+#define CMD_APPEND 0x0010U
+#define CMD_LIST 0x0020U
+#define CMD_FLUSH 0x0040U
+#define CMD_ZERO 0x0080U
+#define CMD_NEW_CHAIN 0x0100U
+#define CMD_DELETE_CHAIN 0x0200U
+#define CMD_SET_POLICY 0x0400U
+#define CMD_CHECK 0x0800U
+#define CMD_RENAME_CHAIN 0x1000U
+#define NUMBER_OF_CMD 13
+static const char cmdflags[] = { 'I', 'D', 'D', 'R', 'A', 'L', 'F', 'Z',
+ 'N', 'X', 'P', 'E' };
+
+#define OPTION_OFFSET 256
+
+#define OPT_NONE 0x00000U
+#define OPT_NUMERIC 0x00001U
+#define OPT_S_IP 0x00002U
+#define OPT_D_IP 0x00004U
+#define OPT_S_MAC 0x00008U
+#define OPT_D_MAC 0x00010U
+#define OPT_H_LENGTH 0x00020U
+#define OPT_P_LENGTH 0x00040U
+#define OPT_OPCODE 0x00080U
+#define OPT_H_TYPE 0x00100U
+#define OPT_P_TYPE 0x00200U
+#define OPT_JUMP 0x00400U
+#define OPT_VERBOSE 0x00800U
+#define OPT_VIANAMEIN 0x01000U
+#define OPT_VIANAMEOUT 0x02000U
+#define OPT_LINENUMBERS 0x04000U
+#define OPT_COUNTERS 0x08000U
+#define NUMBER_OF_OPT 16
+static const char optflags[NUMBER_OF_OPT]
+= { 'n', 's', 'd', 2, 3, 7, 8, 4, 5, 6, 'j', 'v', 'i', 'o', '0', 'c'};
+
+static struct option original_opts[] = {
+ { "append", 1, 0, 'A' },
+ { "delete", 1, 0, 'D' },
+ { "insert", 1, 0, 'I' },
+ { "replace", 1, 0, 'R' },
+ { "list", 2, 0, 'L' },
+ { "flush", 2, 0, 'F' },
+ { "zero", 2, 0, 'Z' },
+ { "new-chain", 1, 0, 'N' },
+ { "delete-chain", 2, 0, 'X' },
+ { "rename-chain", 1, 0, 'E' },
+ { "policy", 1, 0, 'P' },
+ { "source-ip", 1, 0, 's' },
+ { "destination-ip", 1, 0, 'd' },
+ { "src-ip", 1, 0, 's' },
+ { "dst-ip", 1, 0, 'd' },
+ { "source-mac", 1, 0, 2},
+ { "destination-mac", 1, 0, 3},
+ { "src-mac", 1, 0, 2},
+ { "dst-mac", 1, 0, 3},
+ { "h-length", 1, 0, 'l' },
+ { "p-length", 1, 0, 8 },
+ { "opcode", 1, 0, 4 },
+ { "h-type", 1, 0, 5 },
+ { "proto-type", 1, 0, 6 },
+ { "in-interface", 1, 0, 'i' },
+ { "jump", 1, 0, 'j' },
+ { "table", 1, 0, 't' },
+ { "match", 1, 0, 'm' },
+ { "numeric", 0, 0, 'n' },
+ { "out-interface", 1, 0, 'o' },
+ { "verbose", 0, 0, 'v' },
+ { "exact", 0, 0, 'x' },
+ { "version", 0, 0, 'V' },
+ { "help", 2, 0, 'h' },
+ { "line-numbers", 0, 0, '0' },
+ { "modprobe", 1, 0, 'M' },
+ { 0 }
+};
+
+int RUNTIME_NF_ARP_NUMHOOKS = 3;
+
+static struct option *opts = original_opts;
+static unsigned int global_option_offset = 0;
+
+extern void xtables_exit_error(enum xtables_exittype status, const char *msg, ...);
+extern struct xtables_globals xtables_globals;
+
+/* Table of legal combinations of commands and options. If any of the
+ * given commands make an option legal, that option is legal (applies to
+ * CMD_LIST and CMD_ZERO only).
+ * Key:
+ * + compulsory
+ * x illegal
+ * optional
+ */
+
+static char commands_v_options[NUMBER_OF_CMD][NUMBER_OF_OPT] =
+/* Well, it's better than "Re: Linux vs FreeBSD" */
+{
+ /* -n -s -d -p -j -v -x -i -o -f --line */
+/*INSERT*/ {' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '},
+/*DELETE*/ {' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '},
+/*DELETE_NUM*/{' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '},
+/*REPLACE*/ {' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '},
+/*APPEND*/ {' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '},
+/*LIST*/ {' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '},
+/*FLUSH*/ {' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '},
+/*ZERO*/ {' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '},
+/*NEW_CHAIN*/ {' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '},
+/*DEL_CHAIN*/ {' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '},
+/*SET_POLICY*/{' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '},
+/*CHECK*/ {' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '},
+/*RENAME*/ {' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '}
+};
+
+static int inverse_for_options[NUMBER_OF_OPT] =
+{
+/* -n */ 0,
+/* -s */ ARPT_INV_SRCIP,
+/* -d */ ARPT_INV_TGTIP,
+/* 2 */ ARPT_INV_SRCDEVADDR,
+/* 3 */ ARPT_INV_TGTDEVADDR,
+/* -l */ ARPT_INV_ARPHLN,
+/* 8 */ 0,
+/* 4 */ ARPT_INV_ARPOP,
+/* 5 */ ARPT_INV_ARPHRD,
+/* 6 */ ARPT_INV_ARPPRO,
+/* -j */ 0,
+/* -v */ 0,
+/* -i */ ARPT_INV_VIA_IN,
+/* -o */ ARPT_INV_VIA_OUT,
+/*--line*/ 0,
+/* -c */ 0,
+};
+
+const char *program_version = XTABLES_VERSION;
+const char *program_name = "xtables-arp";
+
+/* A few hardcoded protocols for 'all' and in case the user has no
+ /etc/protocols */
+struct pprot {
+ char *name;
+ u_int8_t num;
+};
+
+/* Primitive headers... */
+/* defined in netinet/in.h */
+#if 0
+#ifndef IPPROTO_ESP
+#define IPPROTO_ESP 50
+#endif
+#ifndef IPPROTO_AH
+#define IPPROTO_AH 51
+#endif
+#endif
+
+/***********************************************/
+/* ARPTABLES SPECIFIC NEW FUNCTIONS ADDED HERE */
+/***********************************************/
+
+unsigned char mac_type_unicast[ETH_ALEN] = {0,0,0,0,0,0};
+unsigned char msk_type_unicast[ETH_ALEN] = {1,0,0,0,0,0};
+unsigned char mac_type_multicast[ETH_ALEN] = {1,0,0,0,0,0};
+unsigned char msk_type_multicast[ETH_ALEN] = {1,0,0,0,0,0};
+unsigned char mac_type_broadcast[ETH_ALEN] = {255,255,255,255,255,255};
+unsigned char msk_type_broadcast[ETH_ALEN] = {255,255,255,255,255,255};
+
+/*
+ * put the mac address into 6 (ETH_ALEN) bytes
+ */
+static int getmac_and_mask(char *from, char *to, char *mask)
+{
+ char *p;
+ int i;
+ struct ether_addr *addr;
+
+ if (strcasecmp(from, "Unicast") == 0) {
+ memcpy(to, mac_type_unicast, ETH_ALEN);
+ memcpy(mask, msk_type_unicast, ETH_ALEN);
+ return 0;
+ }
+ if (strcasecmp(from, "Multicast") == 0) {
+ memcpy(to, mac_type_multicast, ETH_ALEN);
+ memcpy(mask, msk_type_multicast, ETH_ALEN);
+ return 0;
+ }
+ if (strcasecmp(from, "Broadcast") == 0) {
+ memcpy(to, mac_type_broadcast, ETH_ALEN);
+ memcpy(mask, msk_type_broadcast, ETH_ALEN);
+ return 0;
+ }
+ if ( (p = strrchr(from, '/')) != NULL) {
+ *p = '\0';
+ if (!(addr = ether_aton(p + 1)))
+ return -1;
+ memcpy(mask, addr, ETH_ALEN);
+ } else
+ memset(mask, 0xff, ETH_ALEN);
+ if (!(addr = ether_aton(from)))
+ return -1;
+ memcpy(to, addr, ETH_ALEN);
+ for (i = 0; i < ETH_ALEN; i++)
+ to[i] &= mask[i];
+ return 0;
+}
+
+static int getlength_and_mask(char *from, uint8_t *to, uint8_t *mask)
+{
+ char *p, *buffer;
+ int i;
+
+ if ( (p = strrchr(from, '/')) != NULL) {
+ *p = '\0';
+ i = strtol(p+1, &buffer, 10);
+ if (*buffer != '\0' || i < 0 || i > 255)
+ return -1;
+ *mask = (uint8_t)i;
+ } else
+ *mask = 255;
+ i = strtol(from, &buffer, 10);
+ if (*buffer != '\0' || i < 0 || i > 255)
+ return -1;
+ *to = (uint8_t)i;
+ return 0;
+}
+
+static int get16_and_mask(char *from, uint16_t *to, uint16_t *mask, int base)
+{
+ char *p, *buffer;
+ int i;
+
+ if ( (p = strrchr(from, '/')) != NULL) {
+ *p = '\0';
+ i = strtol(p+1, &buffer, base);
+ if (*buffer != '\0' || i < 0 || i > 65535)
+ return -1;
+ *mask = htons((uint16_t)i);
+ } else
+ *mask = 65535;
+ i = strtol(from, &buffer, base);
+ if (*buffer != '\0' || i < 0 || i > 65535)
+ return -1;
+ *to = htons((uint16_t)i);
+ return 0;
+}
+
+static int
+string_to_number(const char *s, unsigned int min, unsigned int max,
+ unsigned int *ret)
+{
+ long number;
+ char *end;
+
+ /* Handle hex, octal, etc. */
+ errno = 0;
+ number = strtol(s, &end, 0);
+ if (*end == '\0' && end != s) {
+ /* we parsed a number, let's see if we want this */
+ if (errno != ERANGE && min <= number && number <= max) {
+ *ret = number;
+ return 0;
+ }
+ }
+ return -1;
+}
+
+/*********************************************/
+/* ARPTABLES SPECIFIC NEW FUNCTIONS END HERE */
+/*********************************************/
+
+static struct in_addr *
+dotted_to_addr(const char *dotted)
+{
+ static struct in_addr addr;
+ unsigned char *addrp;
+ char *p, *q;
+ unsigned int onebyte;
+ int i;
+ char buf[20];
+
+ /* copy dotted string, because we need to modify it */
+ strncpy(buf, dotted, sizeof(buf) - 1);
+ addrp = (unsigned char *) &(addr.s_addr);
+
+ p = buf;
+ for (i = 0; i < 3; i++) {
+ if ((q = strchr(p, '.')) == NULL)
+ return (struct in_addr *) NULL;
+
+ *q = '\0';
+ if (string_to_number(p, 0, 255, &onebyte) == -1)
+ return (struct in_addr *) NULL;
+
+ addrp[i] = (unsigned char) onebyte;
+ p = q + 1;
+ }
+
+ /* we've checked 3 bytes, now we check the last one */
+ if (string_to_number(p, 0, 255, &onebyte) == -1)
+ return (struct in_addr *) NULL;
+
+ addrp[3] = (unsigned char) onebyte;
+
+ return &addr;
+}
+
+static struct in_addr *
+network_to_addr(const char *name)
+{
+ struct netent *net;
+ static struct in_addr addr;
+
+ if ((net = getnetbyname(name)) != NULL) {
+ if (net->n_addrtype != AF_INET)
+ return (struct in_addr *) NULL;
+ addr.s_addr = htonl((unsigned long) net->n_net);
+ return &addr;
+ }
+
+ return (struct in_addr *) NULL;
+}
+
+static void
+inaddrcpy(struct in_addr *dst, struct in_addr *src)
+{
+ /* memcpy(dst, src, sizeof(struct in_addr)); */
+ dst->s_addr = src->s_addr;
+}
+
+static void
+exit_tryhelp(int status)
+{
+ fprintf(stderr, "Try `%s -h' or '%s --help' for more information.\n",
+ program_name, program_name );
+ exit(status);
+}
+
+static void
+exit_printhelp(void)
+{
+ struct xtables_target *t = NULL;
+ int i;
+
+ printf("%s v%s\n\n"
+"Usage: %s -[AD] chain rule-specification [options]\n"
+" %s -[RI] chain rulenum rule-specification [options]\n"
+" %s -D chain rulenum [options]\n"
+" %s -[LFZ] [chain] [options]\n"
+" %s -[NX] chain\n"
+" %s -E old-chain-name new-chain-name\n"
+" %s -P chain target [options]\n"
+" %s -h (print this help information)\n\n",
+ program_name, program_version, program_name, program_name,
+ program_name, program_name, program_name, program_name,
+ program_name, program_name);
+
+ printf(
+"Commands:\n"
+"Either long or short options are allowed.\n"
+" --append -A chain Append to chain\n"
+" --delete -D chain Delete matching rule from chain\n"
+" --delete -D chain rulenum\n"
+" Delete rule rulenum (1 = first) from chain\n"
+" --insert -I chain [rulenum]\n"
+" Insert in chain as rulenum (default 1=first)\n"
+" --replace -R chain rulenum\n"
+" Replace rule rulenum (1 = first) in chain\n"
+" --list -L [chain] List the rules in a chain or all chains\n"
+" --flush -F [chain] Delete all rules in chain or all chains\n"
+" --zero -Z [chain] Zero counters in chain or all chains\n"
+" --new -N chain Create a new user-defined chain\n"
+" --delete-chain\n"
+" -X [chain] Delete a user-defined chain\n"
+" --policy -P chain target\n"
+" Change policy on chain to target\n"
+" --rename-chain\n"
+" -E old-chain new-chain\n"
+" Change chain name, (moving any references)\n"
+
+"Options:\n"
+" --source-ip -s [!] address[/mask]\n"
+" source specification\n"
+" --destination-ip -d [!] address[/mask]\n"
+" destination specification\n"
+" --source-mac [!] address[/mask]\n"
+" --destination-mac [!] address[/mask]\n"
+" --h-length -l length[/mask] hardware length (nr of bytes)\n"
+" --opcode code[/mask] operation code (2 bytes)\n"
+" --h-type type[/mask] hardware type (2 bytes, hexadecimal)\n"
+" --proto-type type[/mask] protocol type (2 bytes)\n"
+" --in-interface -i [!] input name[+]\n"
+" network interface name ([+] for wildcard)\n"
+" --out-interface -o [!] output name[+]\n"
+" network interface name ([+] for wildcard)\n"
+" --jump -j target\n"
+" target for rule (may load target extension)\n"
+" --match -m match\n"
+" extended match (may load extension)\n"
+" --numeric -n numeric output of addresses and ports\n"
+" --table -t table table to manipulate (default: `filter')\n"
+" --verbose -v verbose mode\n"
+" --line-numbers print line numbers when listing\n"
+" --exact -x expand numbers (display exact values)\n"
+" --modprobe=<command> try to insert modules using this command\n"
+" --set-counters PKTS BYTES set the counter during insert/append\n"
+"[!] --version -V print package version.\n");
+ printf(" opcode strings: \n");
+ for (i = 0; i < NUMOPCODES; i++)
+ printf(" %d = %s\n", i + 1, opcodes[i]);
+ printf(
+" hardware type string: 1 = Ethernet\n"
+" protocol type string: 0x800 = IPv4\n");
+
+ /* Print out any special helps. A user might like to be able
+ to add a --help to the commandline, and see expected
+ results. So we call help for all matches & targets */
+ for (t = xtables_targets; t; t = t->next) {
+ if (strcmp(t->name, "CLASSIFY") && strcmp(t->name, "mangle"))
+ continue;
+ printf("\n");
+ t->help();
+ }
+ exit(0);
+}
+
+static void
+generic_opt_check(int command, int options)
+{
+ int i, j, legal = 0;
+
+ /* Check that commands are valid with options. Complicated by the
+ * fact that if an option is legal with *any* command given, it is
+ * legal overall (ie. -z and -l).
+ */
+ for (i = 0; i < NUMBER_OF_OPT; i++) {
+ legal = 0; /* -1 => illegal, 1 => legal, 0 => undecided. */
+
+ for (j = 0; j < NUMBER_OF_CMD; j++) {
+ if (!(command & (1<<j)))
+ continue;
+
+ if (!(options & (1<<i))) {
+ if (commands_v_options[j][i] == '+')
+ xtables_error(PARAMETER_PROBLEM,
+ "You need to supply the `-%c' "
+ "option for this command\n",
+ optflags[i]);
+ } else {
+ if (commands_v_options[j][i] != 'x')
+ legal = 1;
+ else if (legal == 0)
+ legal = -1;
+ }
+ }
+ if (legal == -1)
+ xtables_error(PARAMETER_PROBLEM,
+ "Illegal option `-%c' with this command\n",
+ optflags[i]);
+ }
+}
+
+static char
+opt2char(int option)
+{
+ const char *ptr;
+ for (ptr = optflags; option > 1; option >>= 1, ptr++);
+
+ return *ptr;
+}
+
+static char
+cmd2char(int option)
+{
+ const char *ptr;
+ for (ptr = cmdflags; option > 1; option >>= 1, ptr++);
+
+ return *ptr;
+}
+
+static void
+add_command(unsigned int *cmd, const int newcmd, const unsigned int othercmds, int invert)
+{
+ if (invert)
+ xtables_error(PARAMETER_PROBLEM, "unexpected ! flag");
+ if (*cmd & (~othercmds))
+ xtables_error(PARAMETER_PROBLEM, "Can't use -%c with -%c\n",
+ cmd2char(newcmd), cmd2char(*cmd & (~othercmds)));
+ *cmd |= newcmd;
+}
+
+static int
+check_inverse(const char option[], int *invert, int *optind, int argc)
+{
+ if (option && strcmp(option, "!") == 0) {
+ if (*invert)
+ xtables_error(PARAMETER_PROBLEM,
+ "Multiple `!' flags not allowed");
+ *invert = TRUE;
+ if (optind) {
+ *optind = *optind+1;
+ if (argc && *optind > argc)
+ xtables_error(PARAMETER_PROBLEM,
+ "no argument following `!'");
+ }
+
+ return TRUE;
+ }
+ return FALSE;
+}
+
+static struct in_addr *
+host_to_addr(const char *name, unsigned int *naddr)
+{
+ struct hostent *host;
+ struct in_addr *addr;
+ unsigned int i;
+
+ *naddr = 0;
+ if ((host = gethostbyname(name)) != NULL) {
+ if (host->h_addrtype != AF_INET ||
+ host->h_length != sizeof(struct in_addr))
+ return (struct in_addr *) NULL;
+
+ while (host->h_addr_list[*naddr] != (char *) NULL)
+ (*naddr)++;
+ addr = xtables_calloc(*naddr, sizeof(struct in_addr));
+ for (i = 0; i < *naddr; i++)
+ inaddrcpy(&(addr[i]),
+ (struct in_addr *) host->h_addr_list[i]);
+ return addr;
+ }
+
+ return (struct in_addr *) NULL;
+}
+
+/*
+ * All functions starting with "parse" should succeed, otherwise
+ * the program fails.
+ * Most routines return pointers to static data that may change
+ * between calls to the same or other routines with a few exceptions:
+ * "host_to_addr", "parse_hostnetwork", and "parse_hostnetworkmask"
+ * return global static data.
+*/
+
+static struct in_addr *
+parse_hostnetwork(const char *name, unsigned int *naddrs)
+{
+ struct in_addr *addrp, *addrptmp;
+
+ if ((addrptmp = dotted_to_addr(name)) != NULL ||
+ (addrptmp = network_to_addr(name)) != NULL) {
+ addrp = xtables_malloc(sizeof(struct in_addr));
+ inaddrcpy(addrp, addrptmp);
+ *naddrs = 1;
+ return addrp;
+ }
+ if ((addrp = host_to_addr(name, naddrs)) != NULL)
+ return addrp;
+
+ xtables_error(PARAMETER_PROBLEM, "host/network `%s' not found", name);
+}
+
+static struct in_addr *
+parse_mask(char *mask)
+{
+ static struct in_addr maskaddr;
+ struct in_addr *addrp;
+ unsigned int bits;
+
+ if (mask == NULL) {
+ /* no mask at all defaults to 32 bits */
+ maskaddr.s_addr = 0xFFFFFFFF;
+ return &maskaddr;
+ }
+ if ((addrp = dotted_to_addr(mask)) != NULL)
+ /* dotted_to_addr already returns a network byte order addr */
+ return addrp;
+ if (string_to_number(mask, 0, 32, &bits) == -1)
+ xtables_error(PARAMETER_PROBLEM,
+ "invalid mask `%s' specified", mask);
+ if (bits != 0) {
+ maskaddr.s_addr = htonl(0xFFFFFFFF << (32 - bits));
+ return &maskaddr;
+ }
+
+ maskaddr.s_addr = 0L;
+ return &maskaddr;
+}
+
+static void
+parse_hostnetworkmask(const char *name, struct in_addr **addrpp,
+ struct in_addr *maskp, unsigned int *naddrs)
+{
+ struct in_addr *addrp;
+ char buf[256];
+ char *p;
+ int i, j, k, n;
+
+ strncpy(buf, name, sizeof(buf) - 1);
+ if ((p = strrchr(buf, '/')) != NULL) {
+ *p = '\0';
+ addrp = parse_mask(p + 1);
+ } else
+ addrp = parse_mask(NULL);
+ inaddrcpy(maskp, addrp);
+
+ /* if a null mask is given, the name is ignored, like in "any/0" */
+ if (maskp->s_addr == 0L)
+ strcpy(buf, "0.0.0.0");
+
+ addrp = *addrpp = parse_hostnetwork(buf, naddrs);
+ n = *naddrs;
+ for (i = 0, j = 0; i < n; i++) {
+ addrp[j++].s_addr &= maskp->s_addr;
+ for (k = 0; k < j - 1; k++) {
+ if (addrp[k].s_addr == addrp[j - 1].s_addr) {
+ (*naddrs)--;
+ j--;
+ break;
+ }
+ }
+ }
+}
+
+static void
+parse_interface(const char *arg, char *vianame, unsigned char *mask)
+{
+ int vialen = strlen(arg);
+ unsigned int i;
+
+ memset(mask, 0, IFNAMSIZ);
+ memset(vianame, 0, IFNAMSIZ);
+
+ if (vialen + 1 > IFNAMSIZ)
+ xtables_error(PARAMETER_PROBLEM,
+ "interface name `%s' must be shorter than IFNAMSIZ"
+ " (%i)", arg, IFNAMSIZ-1);
+
+ strcpy(vianame, arg);
+ if (vialen == 0)
+ memset(mask, 0, IFNAMSIZ);
+ else if (vianame[vialen - 1] == '+') {
+ memset(mask, 0xFF, vialen - 1);
+ memset(mask + vialen - 1, 0, IFNAMSIZ - vialen + 1);
+ /* Don't remove `+' here! -HW */
+ } else {
+ /* Include nul-terminator in match */
+ memset(mask, 0xFF, vialen + 1);
+ memset(mask + vialen + 1, 0, IFNAMSIZ - vialen - 1);
+ for (i = 0; vianame[i]; i++) {
+ if (!isalnum(vianame[i])
+ && vianame[i] != '_'
+ && vianame[i] != '.') {
+ printf("Warning: wierd character in interface"
+ " `%s' (No aliases, :, ! or *).\n",
+ vianame);
+ break;
+ }
+ }
+ }
+}
+
+/* Can't be zero. */
+static int
+parse_rulenumber(const char *rule)
+{
+ unsigned int rulenum;
+
+ if (string_to_number(rule, 1, INT_MAX, &rulenum) == -1)
+ xtables_error(PARAMETER_PROBLEM,
+ "Invalid rule number `%s'", rule);
+
+ return rulenum;
+}
+
+static const char *
+parse_target(const char *targetname)
+{
+ const char *ptr;
+
+ if (strlen(targetname) < 1)
+ xtables_error(PARAMETER_PROBLEM,
+ "Invalid target name (too short)");
+
+ if (strlen(targetname)+1 > sizeof(arpt_chainlabel))
+ xtables_error(PARAMETER_PROBLEM,
+ "Invalid target name `%s' (%zu chars max)",
+ targetname, sizeof(arpt_chainlabel)-1);
+
+ for (ptr = targetname; *ptr; ptr++)
+ if (isspace(*ptr))
+ xtables_error(PARAMETER_PROBLEM,
+ "Invalid target name `%s'", targetname);
+ return targetname;
+}
+
+static void
+set_option(unsigned int *options, unsigned int option, u_int16_t *invflg,
+ int invert)
+{
+ if (*options & option)
+ xtables_error(PARAMETER_PROBLEM, "multiple -%c flags not allowed",
+ opt2char(option));
+ *options |= option;
+
+ if (invert) {
+ unsigned int i;
+ for (i = 0; 1 << i != option; i++);
+
+ if (!inverse_for_options[i])
+ xtables_error(PARAMETER_PROBLEM,
+ "cannot have ! before -%c",
+ opt2char(option));
+ *invflg |= inverse_for_options[i];
+ }
+}
+
+static int
+list_entries(struct nft_handle *h, const char *chain, const char *table,
+ int rulenum, int verbose, int numeric, int expanded,
+ int linenumbers)
+{
+ unsigned int format;
+
+ format = FMT_OPTIONS;
+ if (!verbose)
+ format |= FMT_NOCOUNTS;
+ else
+ format |= FMT_VIA;
+
+ if (numeric)
+ format |= FMT_NUMERIC;
+
+ if (!expanded)
+ format |= FMT_KILOMEGAGIGA;
+
+ if (linenumbers)
+ format |= FMT_LINENUMBERS;
+
+ return nft_rule_list(h, chain, table, rulenum, format);
+}
+
+static struct arpt_entry *
+generate_entry(const struct arpt_entry *fw,
+ struct arpt_entry_target *target)
+{
+ struct arpt_entry_target **t;
+ struct arpt_entry *e;
+ unsigned int size;
+
+
+ size = sizeof(struct arpt_entry);
+
+ e = xtables_malloc(size + target->u.target_size);
+ *e = *fw;
+ e->target_offset = size;
+ e->next_offset = size + target->u.target_size;
+
+ t = (void *) e + e->target_offset;
+ *t = target;
+
+ return e;
+}
+
+static struct xtables_target *command_jump(struct arpt_entry *fw,
+ const char *jumpto)
+{
+ struct xtables_target *target;
+ size_t size;
+
+ /* XTF_TRY_LOAD (may be chain name) */
+ target = xtables_find_target(jumpto, XTF_TRY_LOAD);
+
+ if (!target)
+ return NULL;
+
+ size = XT_ALIGN(sizeof(struct xt_entry_target))
+ + target->size;
+
+ target->t = xtables_calloc(1, size);
+ target->t->u.target_size = size;
+ strcpy(target->t->u.user.name, jumpto);
+ target->t->u.user.revision = target->revision;
+
+ xs_init_target(target);
+
+ if (target->x6_options != NULL)
+ opts = xtables_options_xfrm(xtables_globals.orig_opts,
+ opts, target->x6_options,
+ &target->option_offset);
+ else
+ opts = xtables_merge_options(xtables_globals.orig_opts,
+ opts, target->extra_opts,
+ &target->option_offset);
+
+ return target;
+}
+
+static int
+append_entry(struct nft_handle *h,
+ const char *chain,
+ const char *table,
+ struct arpt_entry *fw,
+ int rulenum,
+ unsigned int nsaddrs,
+ const struct in_addr saddrs[],
+ unsigned int ndaddrs,
+ const struct in_addr daddrs[],
+ bool verbose, bool append)
+{
+ unsigned int i, j;
+ int ret = 1;
+
+ for (i = 0; i < nsaddrs; i++) {
+ fw->arp.src.s_addr = saddrs[i].s_addr;
+ for (j = 0; j < ndaddrs; j++) {
+ fw->arp.tgt.s_addr = daddrs[j].s_addr;
+ if (append) {
+ ret = nft_arp_rule_append(h, chain, table,
+ fw, verbose);
+ } else {
+ ret = nft_arp_rule_insert(h, chain, table,
+ fw, rulenum,
+ verbose);
+ }
+ }
+ }
+
+ return ret;
+}
+
+int do_commandarp(struct nft_handle *h, int argc, char *argv[], char **table)
+{
+ struct arpt_entry fw, *e = NULL;
+ int invert = 0;
+ unsigned int nsaddrs = 0, ndaddrs = 0;
+ struct in_addr *saddrs = NULL, *daddrs = NULL;
+
+ int c, verbose = 0;
+ const char *chain = NULL;
+ const char *shostnetworkmask = NULL, *dhostnetworkmask = NULL;
+ const char *policy = NULL, *newname = NULL;
+ unsigned int rulenum = 0, options = 0, command = 0;
+ const char *pcnt = NULL, *bcnt = NULL;
+ int ret = 1;
+ struct xtables_target *target = NULL;
+ struct xtables_target *t;
+
+ const char *jumpto = "";
+
+ memset(&fw, 0, sizeof(fw));
+ opts = original_opts;
+ global_option_offset = 0;
+
+ xtables_globals.orig_opts = original_opts;
+
+ /* re-set optind to 0 in case do_command gets called
+ * a second time */
+ optind = 0;
+
+ for (t = xtables_targets; t; t = t->next) {
+ t->tflags = 0;
+ t->used = 0;
+ }
+
+ /* Suppress error messages: we may add new options if we
+ demand-load a protocol. */
+ opterr = 0;
+
+ while ((c = getopt_long(argc, argv,
+ "-A:D:R:I:L::M:F::Z::N:X::E:P:Vh::o:p:s:d:j:l:i:vnt:m:c:",
+ opts, NULL)) != -1) {
+ switch (c) {
+ /*
+ * Command selection
+ */
+ case 'A':
+ add_command(&command, CMD_APPEND, CMD_NONE,
+ invert);
+ chain = optarg;
+ break;
+
+ case 'D':
+ add_command(&command, CMD_DELETE, CMD_NONE,
+ invert);
+ chain = optarg;
+ if (optind < argc && argv[optind][0] != '-'
+ && argv[optind][0] != '!') {
+ rulenum = parse_rulenumber(argv[optind++]);
+ command = CMD_DELETE_NUM;
+ }
+ break;
+
+ case 'R':
+ add_command(&command, CMD_REPLACE, CMD_NONE,
+ invert);
+ chain = optarg;
+ if (optind < argc && argv[optind][0] != '-'
+ && argv[optind][0] != '!')
+ rulenum = parse_rulenumber(argv[optind++]);
+ else
+ xtables_error(PARAMETER_PROBLEM,
+ "-%c requires a rule number",
+ cmd2char(CMD_REPLACE));
+ break;
+
+ case 'I':
+ add_command(&command, CMD_INSERT, CMD_NONE,
+ invert);
+ chain = optarg;
+ if (optind < argc && argv[optind][0] != '-'
+ && argv[optind][0] != '!')
+ rulenum = parse_rulenumber(argv[optind++]);
+ else rulenum = 1;
+ break;
+
+ case 'L':
+ add_command(&command, CMD_LIST, CMD_ZERO,
+ invert);
+ if (optarg) chain = optarg;
+ else if (optind < argc && argv[optind][0] != '-'
+ && argv[optind][0] != '!')
+ chain = argv[optind++];
+ break;
+
+ case 'F':
+ add_command(&command, CMD_FLUSH, CMD_NONE,
+ invert);
+ if (optarg) chain = optarg;
+ else if (optind < argc && argv[optind][0] != '-'
+ && argv[optind][0] != '!')
+ chain = argv[optind++];
+ break;
+
+ case 'Z':
+ add_command(&command, CMD_ZERO, CMD_LIST,
+ invert);
+ if (optarg) chain = optarg;
+ else if (optind < argc && argv[optind][0] != '-'
+ && argv[optind][0] != '!')
+ chain = argv[optind++];
+ break;
+
+ case 'N':
+ if (optarg && *optarg == '-')
+ xtables_error(PARAMETER_PROBLEM,
+ "chain name not allowed to start "
+ "with `-'\n");
+ if (xtables_find_target(optarg, XTF_TRY_LOAD))
+ xtables_error(PARAMETER_PROBLEM,
+ "chain name may not clash "
+ "with target name\n");
+ add_command(&command, CMD_NEW_CHAIN, CMD_NONE,
+ invert);
+ chain = optarg;
+ break;
+
+ case 'X':
+ add_command(&command, CMD_DELETE_CHAIN, CMD_NONE,
+ invert);
+ if (optarg) chain = optarg;
+ else if (optind < argc && argv[optind][0] != '-'
+ && argv[optind][0] != '!')
+ chain = argv[optind++];
+ break;
+
+ case 'E':
+ add_command(&command, CMD_RENAME_CHAIN, CMD_NONE,
+ invert);
+ chain = optarg;
+ if (optind < argc && argv[optind][0] != '-'
+ && argv[optind][0] != '!')
+ newname = argv[optind++];
+ else
+ xtables_error(PARAMETER_PROBLEM,
+ "-%c requires old-chain-name and "
+ "new-chain-name",
+ cmd2char(CMD_RENAME_CHAIN));
+ break;
+
+ case 'P':
+ add_command(&command, CMD_SET_POLICY, CMD_NONE,
+ invert);
+ chain = optarg;
+ if (optind < argc && argv[optind][0] != '-'
+ && argv[optind][0] != '!')
+ policy = argv[optind++];
+ else
+ xtables_error(PARAMETER_PROBLEM,
+ "-%c requires a chain and a policy",
+ cmd2char(CMD_SET_POLICY));
+ break;
+
+ case 'h':
+ if (!optarg)
+ optarg = argv[optind];
+
+ exit_printhelp();
+ break;
+ case 's':
+ check_inverse(optarg, &invert, &optind, argc);
+ set_option(&options, OPT_S_IP, &fw.arp.invflags,
+ invert);
+ shostnetworkmask = argv[optind-1];
+ break;
+
+ case 'd':
+ check_inverse(optarg, &invert, &optind, argc);
+ set_option(&options, OPT_D_IP, &fw.arp.invflags,
+ invert);
+ dhostnetworkmask = argv[optind-1];
+ break;
+
+ case 2:/* src-mac */
+ check_inverse(optarg, &invert, &optind, argc);
+ set_option(&options, OPT_S_MAC, &fw.arp.invflags,
+ invert);
+ if (getmac_and_mask(argv[optind - 1],
+ fw.arp.src_devaddr.addr, fw.arp.src_devaddr.mask))
+ xtables_error(PARAMETER_PROBLEM, "Problem with specified "
+ "source mac");
+ break;
+
+ case 3:/* dst-mac */
+ check_inverse(optarg, &invert, &optind, argc);
+ set_option(&options, OPT_D_MAC, &fw.arp.invflags,
+ invert);
+
+ if (getmac_and_mask(argv[optind - 1],
+ fw.arp.tgt_devaddr.addr, fw.arp.tgt_devaddr.mask))
+ xtables_error(PARAMETER_PROBLEM, "Problem with specified "
+ "destination mac");
+ break;
+
+ case 'l':/* hardware length */
+ check_inverse(optarg, &invert, &optind, argc);
+ set_option(&options, OPT_H_LENGTH, &fw.arp.invflags,
+ invert);
+ getlength_and_mask(argv[optind - 1], &fw.arp.arhln,
+ &fw.arp.arhln_mask);
+ break;
+
+ case 8:/* protocol length */
+ xtables_error(PARAMETER_PROBLEM, "not supported");
+/*
+ check_inverse(optarg, &invert, &optind, argc);
+ set_option(&options, OPT_P_LENGTH, &fw.arp.invflags,
+ invert);
+
+ getlength_and_mask(argv[optind - 1], &fw.arp.arpln,
+ &fw.arp.arpln_mask);
+ break;
+*/
+
+ case 4:/* opcode */
+ check_inverse(optarg, &invert, &optind, argc);
+ set_option(&options, OPT_OPCODE, &fw.arp.invflags,
+ invert);
+ if (get16_and_mask(argv[optind - 1], &fw.arp.arpop, &fw.arp.arpop_mask, 10)) {
+ int i;
+
+ for (i = 0; i < NUMOPCODES; i++)
+ if (!strcasecmp(opcodes[i], optarg))
+ break;
+ if (i == NUMOPCODES)
+ xtables_error(PARAMETER_PROBLEM, "Problem with specified opcode");
+ fw.arp.arpop = htons(i+1);
+ }
+ break;
+
+ case 5:/* h-type */
+ check_inverse(optarg, &invert, &optind, argc);
+ set_option(&options, OPT_H_TYPE, &fw.arp.invflags,
+ invert);
+ if (get16_and_mask(argv[optind - 1], &fw.arp.arhrd, &fw.arp.arhrd_mask, 16)) {
+ if (strcasecmp(argv[optind-1], "Ethernet"))
+ xtables_error(PARAMETER_PROBLEM, "Problem with specified hardware type");
+ fw.arp.arhrd = htons(1);
+ }
+ break;
+
+ case 6:/* proto-type */
+ check_inverse(optarg, &invert, &optind, argc);
+ set_option(&options, OPT_P_TYPE, &fw.arp.invflags,
+ invert);
+ if (get16_and_mask(argv[optind - 1], &fw.arp.arpro, &fw.arp.arpro_mask, 0)) {
+ if (strcasecmp(argv[optind-1], "ipv4"))
+ xtables_error(PARAMETER_PROBLEM, "Problem with specified protocol type");
+ fw.arp.arpro = htons(0x800);
+ }
+ break;
+
+ case 'j':
+ set_option(&options, OPT_JUMP, &fw.arp.invflags,
+ invert);
+ jumpto = parse_target(optarg);
+ target = command_jump(&fw, jumpto);
+ break;
+
+ case 'i':
+ check_inverse(optarg, &invert, &optind, argc);
+ set_option(&options, OPT_VIANAMEIN, &fw.arp.invflags,
+ invert);
+ parse_interface(argv[optind-1],
+ fw.arp.iniface,
+ fw.arp.iniface_mask);
+/* fw.nfcache |= NFC_IP_IF_IN; */
+ break;
+
+ case 'o':
+ check_inverse(optarg, &invert, &optind, argc);
+ set_option(&options, OPT_VIANAMEOUT, &fw.arp.invflags,
+ invert);
+ parse_interface(argv[optind-1],
+ fw.arp.outiface,
+ fw.arp.outiface_mask);
+ /* fw.nfcache |= NFC_IP_IF_OUT; */
+ break;
+
+ case 'v':
+ if (!verbose)
+ set_option(&options, OPT_VERBOSE,
+ &fw.arp.invflags, invert);
+ verbose++;
+ break;
+
+ case 'm': /*{
+ size_t size;
+
+ if (invert)
+ exit_error(PARAMETER_PROBLEM,
+ "unexpected ! flag before --match");
+
+ m = find_match(optarg, LOAD_MUST_SUCCEED);
+ size = ARPT_ALIGN(sizeof(struct arpt_entry_match))
+ + m->size;
+ m->m = fw_calloc(1, size);
+ m->m->u.match_size = size;
+ strcpy(m->m->u.user.name, m->name);
+ m->init(m->m, &fw.nfcache);
+ opts = merge_options(opts, m->extra_opts, &m->option_offset);
+ }*/
+ break;
+
+ case 'n':
+ set_option(&options, OPT_NUMERIC, &fw.arp.invflags,
+ invert);
+ break;
+
+ case 't':
+ if (invert)
+ xtables_error(PARAMETER_PROBLEM,
+ "unexpected ! flag before --table");
+ *table = argv[optind-1];
+ break;
+
+ case 'V':
+ if (invert)
+ printf("Not %s ;-)\n", program_version);
+ else
+ printf("%s v%s\n",
+ program_name, program_version);
+ exit(0);
+
+ case '0':
+ set_option(&options, OPT_LINENUMBERS, &fw.arp.invflags,
+ invert);
+ break;
+
+ case 'M':
+ //modprobe = optarg;
+ break;
+
+ case 'c':
+
+ set_option(&options, OPT_COUNTERS, &fw.arp.invflags,
+ invert);
+ pcnt = optarg;
+ if (optind < argc && argv[optind][0] != '-'
+ && argv[optind][0] != '!')
+ bcnt = argv[optind++];
+ else
+ xtables_error(PARAMETER_PROBLEM,
+ "-%c requires packet and byte counter",
+ opt2char(OPT_COUNTERS));
+
+ if (sscanf(pcnt, "%llu", &fw.counters.pcnt) != 1)
+ xtables_error(PARAMETER_PROBLEM,
+ "-%c packet counter not numeric",
+ opt2char(OPT_COUNTERS));
+
+ if (sscanf(bcnt, "%llu", &fw.counters.bcnt) != 1)
+ xtables_error(PARAMETER_PROBLEM,
+ "-%c byte counter not numeric",
+ opt2char(OPT_COUNTERS));
+
+ break;
+
+
+ case 1: /* non option */
+ if (optarg[0] == '!' && optarg[1] == '\0') {
+ if (invert)
+ xtables_error(PARAMETER_PROBLEM,
+ "multiple consecutive ! not"
+ " allowed");
+ invert = TRUE;
+ optarg[0] = '\0';
+ continue;
+ }
+ printf("Bad argument `%s'\n", optarg);
+ exit_tryhelp(2);
+
+ default:
+ break;
+ }
+ invert = FALSE;
+ }
+
+ if (target)
+ xtables_option_tfcall(target);
+
+ /* Fix me: must put inverse options checking here --MN */
+
+ if (optind < argc)
+ xtables_error(PARAMETER_PROBLEM,
+ "unknown arguments found on commandline");
+ if (!command)
+ xtables_error(PARAMETER_PROBLEM, "no command specified");
+ if (invert)
+ xtables_error(PARAMETER_PROBLEM,
+ "nothing appropriate following !");
+
+ if (command & (CMD_REPLACE | CMD_INSERT | CMD_DELETE | CMD_APPEND)) {
+ if (!(options & OPT_D_IP))
+ dhostnetworkmask = "0.0.0.0/0";
+ if (!(options & OPT_S_IP))
+ shostnetworkmask = "0.0.0.0/0";
+ }
+
+ if (shostnetworkmask)
+ parse_hostnetworkmask(shostnetworkmask, &saddrs,
+ &(fw.arp.smsk), &nsaddrs);
+
+ if (dhostnetworkmask)
+ parse_hostnetworkmask(dhostnetworkmask, &daddrs,
+ &(fw.arp.tmsk), &ndaddrs);
+
+ if ((nsaddrs > 1 || ndaddrs > 1) &&
+ (fw.arp.invflags & (ARPT_INV_SRCIP | ARPT_INV_TGTIP)))
+ xtables_error(PARAMETER_PROBLEM, "! not allowed with multiple"
+ " source or destination IP addresses");
+
+ if (command == CMD_REPLACE && (nsaddrs != 1 || ndaddrs != 1))
+ xtables_error(PARAMETER_PROBLEM, "Replacement rule does not "
+ "specify a unique address");
+
+ generic_opt_check(command, options);
+
+ if (chain && strlen(chain) > ARPT_FUNCTION_MAXNAMELEN)
+ xtables_error(PARAMETER_PROBLEM,
+ "chain name `%s' too long (must be under %i chars)",
+ chain, ARPT_FUNCTION_MAXNAMELEN);
+
+ if (nft_init(h, xtables_arp) < 0)
+ xtables_error(OTHER_PROBLEM,
+ "Could not initialize nftables layer.");
+
+ h->ops = nft_family_ops_lookup(h->family);
+ if (h->ops == NULL)
+ xtables_error(PARAMETER_PROBLEM, "Unknown family");
+
+ if (command == CMD_APPEND
+ || command == CMD_DELETE
+ || command == CMD_INSERT
+ || command == CMD_REPLACE) {
+ if (strcmp(chain, "PREROUTING") == 0
+ || strcmp(chain, "INPUT") == 0) {
+ /* -o not valid with incoming packets. */
+ if (options & OPT_VIANAMEOUT)
+ xtables_error(PARAMETER_PROBLEM,
+ "Can't use -%c with %s\n",
+ opt2char(OPT_VIANAMEOUT),
+ chain);
+ }
+
+ if (strcmp(chain, "POSTROUTING") == 0
+ || strcmp(chain, "OUTPUT") == 0) {
+ /* -i not valid with outgoing packets */
+ if (options & OPT_VIANAMEIN)
+ xtables_error(PARAMETER_PROBLEM,
+ "Can't use -%c with %s\n",
+ opt2char(OPT_VIANAMEIN),
+ chain);
+ }
+
+ if (!target && strlen(jumpto) != 0) {
+ size_t size;
+
+ target = xtables_find_target(XT_STANDARD_TARGET,
+ XTF_LOAD_MUST_SUCCEED);
+ size = sizeof(struct arpt_entry_target) + target->size;
+ target->t = xtables_calloc(1, size);
+ target->t->u.target_size = size;
+ strcpy(target->t->u.user.name, jumpto);
+ }
+
+ if (!target) {
+ xtables_error(PARAMETER_PROBLEM,
+ "No target provided or"
+ " initalization failed");
+ }
+
+ e = generate_entry(&fw, target->t);
+ }
+
+ switch (command) {
+ case CMD_APPEND:
+ ret = append_entry(h, chain, *table, e, 0,
+ nsaddrs, saddrs, ndaddrs, daddrs,
+ options&OPT_VERBOSE, true);
+ break;
+ case CMD_DELETE:
+ /*ret = delete_entry(chain, e,
+ nsaddrs, saddrs, ndaddrs, daddrs,
+ options&OPT_VERBOSE,
+ handle);*/
+ break;
+ case CMD_DELETE_NUM:
+ /*ret = arptc_delete_num_entry(chain, rulenum - 1, handle);*/
+ break;
+ case CMD_REPLACE:
+ /*ret = replace_entry(chain, e, rulenum - 1,
+ saddrs, daddrs, options&OPT_VERBOSE,
+ handle);*/
+ break;
+ case CMD_INSERT:
+ ret = append_entry(h, chain, *table, e, rulenum,
+ nsaddrs, saddrs, ndaddrs, daddrs,
+ options&OPT_VERBOSE, false);
+ break;
+ case CMD_LIST:
+ ret = list_entries(h, chain, *table,
+ rulenum,
+ options&OPT_VERBOSE,
+ options&OPT_NUMERIC,
+ /*options&OPT_EXPANDED*/0,
+ options&OPT_LINENUMBERS);
+ break;
+ case CMD_FLUSH:
+ ret = nft_rule_flush(h, chain, *table);
+ break;
+ case CMD_ZERO:
+ ret = nft_chain_zero_counters(h, chain, *table);
+ break;
+ case CMD_LIST|CMD_ZERO:
+ ret = list_entries(h, chain, *table, rulenum,
+ options&OPT_VERBOSE,
+ options&OPT_NUMERIC,
+ /*options&OPT_EXPANDED*/0,
+ options&OPT_LINENUMBERS);
+ /*if (ret)
+ ret = zero_entries(chain,
+ options&OPT_VERBOSE, handle);*/
+ break;
+ case CMD_NEW_CHAIN:
+ ret = nft_chain_user_add(h, chain, *table);
+ break;
+ case CMD_DELETE_CHAIN:
+ ret = nft_chain_user_del(h, chain, *table);
+ break;
+ case CMD_RENAME_CHAIN:
+ ret = nft_chain_user_rename(h, chain, *table, newname);
+ break;
+ case CMD_SET_POLICY:
+ ret = nft_chain_set(h, *table, chain, policy, NULL);
+ if (ret < 0)
+ xtables_error(PARAMETER_PROBLEM, "Wrong policy `%s'\n",
+ policy);
+ break;
+ default:
+ /* We should never reach this... */
+ exit_tryhelp(2);
+ }
+
+/* if (verbose > 1)
+ dump_entries(*handle);*/
+
+ return ret;
+}
diff --git a/iptables/xtables-multi.c b/iptables/xtables-multi.c
index 5732ba3..5f48735 100644
--- a/iptables/xtables-multi.c
+++ b/iptables/xtables-multi.c
@@ -42,6 +42,7 @@
{"xtables-restore", xtables_restore_main},
{"xtables-config", xtables_config_main},
{"xtables-events", xtables_events_main},
+ {"xtables-arp", xtables_arp_main},
#endif
{NULL},
};
diff --git a/iptables/xtables-multi.h b/iptables/xtables-multi.h
index c609ea5..759e24f 100644
--- a/iptables/xtables-multi.h
+++ b/iptables/xtables-multi.h
@@ -7,5 +7,6 @@
extern int xtables_restore_main(int, char **);
extern int xtables_config_main(int, char **);
extern int xtables_events_main(int, char **);
+extern int xtables_arp_main(int, char **);
#endif /* _XTABLES_MULTI_H */
