ebtables-compat: add 'ip6' match extension

Signed-off-by: Florian Westphal <fw@strlen.de>

2 files changed, 665 insertions, 0 deletions

diff --git a/extensions/libebt_ip6.c b/extensions/libebt_ip6.c
new file mode 100644
index 00000000..f1ebb8b9
--- /dev/null
+++ b/extensions/libebt_ip6.c
@@ -0,0 +1,636 @@
+/* ebt_ip6
+ *
+ * Authors:
+ * Kuo-Lang Tseng <kuo-lang.tseng@intel.com>
+ * Manohar Castelino <manohar.castelino@intel.com>
+ *
+ * Summary:
+ * This is just a modification of the IPv4 code written by
+ * Bart De Schuymer <bdschuym@pandora.be>
+ * with the changes required to support IPv6
+ *
+ */
+
+#include <errno.h>
+#include <arpa/inet.h>
+#include <inttypes.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <getopt.h>
+#include <netdb.h>
+#include <xtables.h>
+#include <linux/netfilter_bridge/ebt_ip6.h>
+
+#include "libxt_icmp.h"
+
+#define IP_SOURCE '1'
+#define IP_DEST   '2'
+#define IP_TCLASS '3'
+#define IP_PROTO  '4'
+#define IP_SPORT  '5'
+#define IP_DPORT  '6'
+#define IP_ICMP6  '7'
+
+static const struct option brip6_opts[] = {
+	{ .name = "ip6-source",		.has_arg = true, .val = IP_SOURCE },
+	{ .name = "ip6-src",		.has_arg = true, .val = IP_SOURCE },
+	{ .name = "ip6-destination",	.has_arg = true, .val = IP_DEST },
+	{ .name = "ip6-dst",		.has_arg = true, .val = IP_DEST },
+	{ .name = "ip6-tclass",		.has_arg = true, .val = IP_TCLASS },
+	{ .name = "ip6-protocol",	.has_arg = true, .val = IP_PROTO },
+	{ .name = "ip6-proto",		.has_arg = true, .val = IP_PROTO },
+	{ .name = "ip6-source-port",	.has_arg = true, .val = IP_SPORT },
+	{ .name = "ip6-sport",		.has_arg = true, .val = IP_SPORT },
+	{ .name = "ip6-destination-port",.has_arg = true,.val = IP_DPORT },
+	{ .name = "ip6-dport",		.has_arg = true, .val = IP_DPORT },
+	{ .name = "ip6-icmp-type",	.has_arg = true, .val = IP_ICMP6 },
+	XT_GETOPT_TABLEEND,
+};
+
+static const struct xt_icmp_names icmpv6_codes[] = {
+	{ "destination-unreachable", 1, 0, 0xFF },
+	{ "no-route", 1, 0, 0 },
+	{ "communication-prohibited", 1, 1, 1 },
+	{ "address-unreachable", 1, 3, 3 },
+	{ "port-unreachable", 1, 4, 4 },
+
+	{ "packet-too-big", 2, 0, 0xFF },
+
+	{ "time-exceeded", 3, 0, 0xFF },
+	/* Alias */ { "ttl-exceeded", 3, 0, 0xFF },
+	{ "ttl-zero-during-transit", 3, 0, 0 },
+	{ "ttl-zero-during-reassembly", 3, 1, 1 },
+
+	{ "parameter-problem", 4, 0, 0xFF },
+	{ "bad-header", 4, 0, 0 },
+	{ "unknown-header-type", 4, 1, 1 },
+	{ "unknown-option", 4, 2, 2 },
+
+	{ "echo-request", 128, 0, 0xFF },
+	/* Alias */ { "ping", 128, 0, 0xFF },
+
+	{ "echo-reply", 129, 0, 0xFF },
+	/* Alias */ { "pong", 129, 0, 0xFF },
+
+	{ "router-solicitation", 133, 0, 0xFF },
+
+	{ "router-advertisement", 134, 0, 0xFF },
+
+	{ "neighbour-solicitation", 135, 0, 0xFF },
+	/* Alias */ { "neighbor-solicitation", 135, 0, 0xFF },
+
+	{ "neighbour-advertisement", 136, 0, 0xFF },
+	/* Alias */ { "neighbor-advertisement", 136, 0, 0xFF },
+
+	{ "redirect", 137, 0, 0xFF },
+};
+
+static void
+parse_port_range(const char *protocol, const char *portstring, uint16_t *ports)
+{
+	char *buffer;
+	char *cp;
+
+	buffer = strdup(portstring);
+	if ((cp = strchr(buffer, ':')) == NULL)
+		ports[0] = ports[1] = xtables_parse_port(buffer, NULL);
+	else {
+		*cp = '\0';
+		cp++;
+
+		ports[0] = buffer[0] ? xtables_parse_port(buffer, NULL) : 0;
+		ports[1] = cp[0] ? xtables_parse_port(cp, NULL) : 0xFFFF;
+
+		if (ports[0] > ports[1])
+			xtables_error(PARAMETER_PROBLEM,
+				      "invalid portrange (min > max)");
+	}
+	free(buffer);
+}
+
+static char *parse_range(const char *str, unsigned int res[])
+{
+	char *next;
+
+	if (!xtables_strtoui(str, &next, &res[0], 0, 255))
+		return NULL;
+
+	res[1] = res[0];
+	if (*next == ':') {
+		str = next + 1;
+		if (!xtables_strtoui(str, &next, &res[1], 0, 255))
+			return NULL;
+	}
+
+	return next;
+}
+
+static int
+parse_icmpv6(const char *icmpv6type, uint8_t type[], uint8_t code[])
+{
+	static const unsigned int limit = ARRAY_SIZE(icmpv6_codes);
+	unsigned int match = limit;
+	unsigned int i, number[2];
+
+	for (i = 0; i < limit; i++) {
+		if (strncasecmp(icmpv6_codes[i].name, icmpv6type, strlen(icmpv6type)))
+			continue;
+		if (match != limit)
+			xtables_error(PARAMETER_PROBLEM, "Ambiguous ICMPv6 type `%s':"
+					" `%s' or `%s'?",
+					icmpv6type, icmpv6_codes[match].name,
+					icmpv6_codes[i].name);
+		match = i;
+	}
+
+	if (match < limit) {
+		type[0] = type[1] = icmpv6_codes[match].type;
+		code[0] = icmpv6_codes[match].code_min;
+		code[1] = icmpv6_codes[match].code_max;
+	} else {
+		char *next = parse_range(icmpv6type, number);
+		if (!next) {
+			xtables_error(PARAMETER_PROBLEM, "Unknown ICMPv6 type `%s'",
+							icmpv6type);
+			return -1;
+		}
+		type[0] = (uint8_t) number[0];
+		type[1] = (uint8_t) number[1];
+		switch (*next) {
+		case 0:
+			code[0] = 0;
+			code[1] = 255;
+			return 0;
+		case '/':
+			next = parse_range(next+1, number);
+			code[0] = (uint8_t) number[0];
+			code[1] = (uint8_t) number[1];
+			if (next == NULL)
+				return -1;
+			if (next && *next == 0)
+				return 0;
+		/* fallthrough */
+		default:
+			xtables_error(PARAMETER_PROBLEM, "unknown character %c", *next);
+			return -1;
+		}
+	}
+	return 0;
+}
+
+static void print_port_range(uint16_t *ports)
+{
+	if (ports[0] == ports[1])
+		printf("%d ", ports[0]);
+	else
+		printf("%d:%d ", ports[0], ports[1]);
+}
+
+static void print_icmp_code(uint8_t *code)
+{
+	if (code[0] == code[1])
+		printf("/%"PRIu8 " ", code[0]);
+	else
+		printf("/%"PRIu8":%"PRIu8 " ", code[0], code[1]);
+}
+
+static void print_icmp_type(uint8_t *type, uint8_t *code)
+{
+	unsigned int i;
+
+	if (type[0] != type[1]) {
+		printf("%"PRIu8 ":%" PRIu8, type[0], type[1]);
+		print_icmp_code(code);
+		return;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(icmpv6_codes); i++) {
+		if (icmpv6_codes[i].type != type[0])
+			continue;
+
+		if (icmpv6_codes[i].code_min == code[0] &&
+		    icmpv6_codes[i].code_max == code[1]) {
+			printf("%s ", icmpv6_codes[i].name);
+			return;
+		}
+	}
+	printf("%"PRIu8, type[0]);
+	print_icmp_code(code);
+}
+
+static void brip6_print_help(void)
+{
+	printf(
+"ip6 options:\n"
+"--ip6-src    [!] address[/mask]: ipv6 source specification\n"
+"--ip6-dst    [!] address[/mask]: ipv6 destination specification\n"
+"--ip6-tclass [!] tclass        : ipv6 traffic class specification\n"
+"--ip6-proto  [!] protocol      : ipv6 protocol specification\n"
+"--ip6-sport  [!] port[:port]   : tcp/udp source port or port range\n"
+"--ip6-dport  [!] port[:port]   : tcp/udp destination port or port range\n"
+"--ip6-icmp-type [!] type[[:type]/code[:code]] : ipv6-icmp type/code or type/code range\n");
+	printf("Valid ICMPv6 Types:");
+	xt_print_icmp_types(icmpv6_codes, ARRAY_SIZE(icmpv6_codes));
+}
+
+static void brip6_init(struct xt_entry_match *match)
+{
+	struct ebt_ip6_info *ipinfo = (struct ebt_ip6_info *)match->data;
+
+	ipinfo->invflags = 0;
+	ipinfo->bitmask = 0;
+	memset(ipinfo->saddr.s6_addr, 0, sizeof(ipinfo->saddr.s6_addr));
+	memset(ipinfo->smsk.s6_addr, 0, sizeof(ipinfo->smsk.s6_addr));
+	memset(ipinfo->daddr.s6_addr, 0, sizeof(ipinfo->daddr.s6_addr));
+	memset(ipinfo->dmsk.s6_addr, 0, sizeof(ipinfo->dmsk.s6_addr));
+}
+
+static struct in6_addr *numeric_to_addr(const char *num)
+{
+	static struct in6_addr ap;
+	int err;
+
+	if ((err=inet_pton(AF_INET6, num, &ap)) == 1)
+		return &ap;
+	return (struct in6_addr *)NULL;
+}
+
+static struct in6_addr *parse_ip6_mask(char *mask)
+{
+	static struct in6_addr maskaddr;
+	struct in6_addr *addrp;
+	unsigned int bits;
+
+	if (mask == NULL) {
+		/* no mask at all defaults to 128 bits */
+		memset(&maskaddr, 0xff, sizeof maskaddr);
+		return &maskaddr;
+	}
+	if ((addrp = numeric_to_addr(mask)) != NULL)
+		return addrp;
+	if (!xtables_strtoui(mask, NULL, &bits, 0, 128))
+		xtables_error(PARAMETER_PROBLEM, "Invalid IPv6 Mask '%s' specified", mask);
+	if (bits != 0) {
+		char *p = (char *)&maskaddr;
+		memset(p, 0xff, bits / 8);
+		memset(p + (bits / 8) + 1, 0, (128 - bits) / 8);
+		p[bits / 8] = 0xff << (8 - (bits & 7));
+		return &maskaddr;
+	}
+
+	memset(&maskaddr, 0, sizeof maskaddr);
+	return &maskaddr;
+}
+
+/* Set the ipv6 mask and address. Callers should check ebt_errormsg[0].
+ * The string pointed to by address can be altered. */
+static void ebt_parse_ip6_address(char *address, struct in6_addr *addr, struct in6_addr *msk)
+{
+	struct in6_addr *tmp_addr;
+	char buf[256];
+	char *p;
+	int i;
+	int err;
+
+	strncpy(buf, address, sizeof(buf) - 1);
+	/* first the mask */
+	buf[sizeof(buf) - 1] = '\0';
+	if ((p = strrchr(buf, '/')) != NULL) {
+		*p = '\0';
+		tmp_addr = parse_ip6_mask(p + 1);
+	} else
+		tmp_addr = parse_ip6_mask(NULL);
+
+	*msk = *tmp_addr;
+
+	/* if a null mask is given, the name is ignored, like in "any/0" */
+	if (!memcmp(msk, &in6addr_any, sizeof(in6addr_any)))
+		strcpy(buf, "::");
+
+	if ((err=inet_pton(AF_INET6, buf, addr)) < 1) {
+		xtables_error(PARAMETER_PROBLEM, "Invalid IPv6 Address '%s' specified", buf);
+		return;
+	}
+
+	for (i = 0; i < 4; i++)
+		addr->s6_addr32[i] &= msk->s6_addr32[i];
+}
+
+#define OPT_SOURCE 0x01
+#define OPT_DEST   0x02
+#define OPT_TCLASS 0x04
+#define OPT_PROTO  0x08
+#define OPT_SPORT  0x10
+#define OPT_DPORT  0x20
+static int
+brip6_parse(int c, char **argv, int invert, unsigned int *flags,
+	   const void *entry, struct xt_entry_match **match)
+{
+	struct ebt_ip6_info *info = (struct ebt_ip6_info *)(*match)->data;
+	unsigned int i;
+	char *end;
+
+	switch (c) {
+	case IP_SOURCE:
+		if (invert)
+			info->invflags |= EBT_IP6_SOURCE;
+		ebt_parse_ip6_address(optarg, &info->saddr, &info->smsk);
+		info->bitmask |= EBT_IP6_SOURCE;
+		break;
+	case IP_DEST:
+		if (invert)
+			info->invflags |= EBT_IP6_DEST;
+		ebt_parse_ip6_address(optarg, &info->daddr, &info->dmsk);
+		info->bitmask |= EBT_IP6_DEST;
+		break;
+	case IP_SPORT:
+		if (invert)
+			info->invflags |= EBT_IP6_SPORT;
+		parse_port_range(NULL, optarg, info->sport);
+		info->bitmask |= EBT_IP6_SPORT;
+		break;
+	case IP_DPORT:
+		if (invert)
+			info->invflags |= EBT_IP6_DEST;
+		parse_port_range(NULL, optarg, info->dport);
+		info->bitmask |= EBT_IP6_DPORT;
+		break;
+	case IP_ICMP6:
+		if (invert)
+			info->invflags |= EBT_IP6_ICMP6;
+		if (parse_icmpv6(optarg, info->icmpv6_type, info->icmpv6_code))
+			return 0;
+		info->bitmask |= EBT_IP6_ICMP6;
+		break;
+	case IP_TCLASS:
+		if (invert)
+			info->invflags |= EBT_IP6_TCLASS;
+		if (!xtables_strtoui(optarg, &end, &i, 0, 255))
+			xtables_error(PARAMETER_PROBLEM, "Problem with specified IPv6 traffic class '%s'", optarg);
+		info->tclass = i;
+		info->bitmask |= EBT_IP6_TCLASS;
+		break;
+	case IP_PROTO:
+		if (invert)
+			info->invflags |= EBT_IP6_PROTO;
+		info->protocol = xtables_parse_protocol(optarg);
+		if (info->protocol == -1)
+			xtables_error(PARAMETER_PROBLEM,
+				      "Unknown specified IP protocol - %s",
+				      optarg);
+		info->bitmask |= EBT_IP6_PROTO;
+		break;
+	default:
+		return 0;
+	}
+
+	*flags |= info->bitmask;
+	return 1;
+}
+
+static void brip6_final_check(unsigned int flags)
+{
+	if (!flags)
+		xtables_error(PARAMETER_PROBLEM,
+			      "You must specify proper arguments");
+}
+
+static void brip6_print(const void *ip, const struct xt_entry_match *match,
+		       int numeric)
+{
+	struct ebt_ip6_info *ipinfo = (struct ebt_ip6_info *)match->data;
+
+	if (ipinfo->bitmask & EBT_IP6_SOURCE) {
+		printf("--ip6-src ");
+		if (ipinfo->invflags & EBT_IP6_SOURCE)
+			printf("! ");
+		printf("%s", xtables_ip6addr_to_numeric(&ipinfo->saddr));
+		printf("%s ", xtables_ip6mask_to_numeric(&ipinfo->smsk));
+	}
+	if (ipinfo->bitmask & EBT_IP6_DEST) {
+		printf("--ip6-dst ");
+		if (ipinfo->invflags & EBT_IP6_DEST)
+			printf("! ");
+		printf("%s", xtables_ip6addr_to_numeric(&ipinfo->daddr));
+		printf("%s ", xtables_ip6mask_to_numeric(&ipinfo->dmsk));
+	}
+	if (ipinfo->bitmask & EBT_IP6_TCLASS) {
+		printf("--ip6-tclass ");
+		if (ipinfo->invflags & EBT_IP6_TCLASS)
+			printf("! ");
+		printf("0x%02X ", ipinfo->tclass);
+	}
+	if (ipinfo->bitmask & EBT_IP6_PROTO) {
+		struct protoent *pe;
+
+		printf("--ip6-proto ");
+		if (ipinfo->invflags & EBT_IP6_PROTO)
+			printf("! ");
+		pe = getprotobynumber(ipinfo->protocol);
+		if (pe == NULL) {
+			printf("%d ", ipinfo->protocol);
+		} else {
+			printf("%s ", pe->p_name);
+		}
+	}
+	if (ipinfo->bitmask & EBT_IP6_SPORT) {
+		printf("--ip6-sport ");
+		if (ipinfo->invflags & EBT_IP6_SPORT)
+			printf("! ");
+		print_port_range(ipinfo->sport);
+	}
+	if (ipinfo->bitmask & EBT_IP6_DPORT) {
+		printf("--ip6-dport ");
+		if (ipinfo->invflags & EBT_IP6_DPORT)
+			printf("! ");
+		print_port_range(ipinfo->dport);
+	}
+	if (ipinfo->bitmask & EBT_IP6_ICMP6) {
+		printf("--ip6-icmp-type ");
+		if (ipinfo->invflags & EBT_IP6_ICMP6)
+			printf("! ");
+		print_icmp_type(ipinfo->icmpv6_type, ipinfo->icmpv6_code);
+	}
+}
+
+static void brip_xlate_th(struct xt_xlate *xl,
+			  const struct ebt_ip6_info *info, int bit,
+			  const char *pname)
+{
+	const uint16_t *ports;
+
+	if ((info->bitmask & bit) == 0)
+		return;
+
+	switch (bit) {
+	case EBT_IP6_SPORT:
+		if (pname)
+			xt_xlate_add(xl, "%s sport ", pname);
+		else
+			xt_xlate_add(xl, "@th,0,16 ");
+
+		ports = info->sport;
+		break;
+	case EBT_IP6_DPORT:
+		if (pname)
+			xt_xlate_add(xl, "%s dport ", pname);
+		else
+			xt_xlate_add(xl, "@th,16,16 ");
+
+		ports = info->dport;
+		break;
+	default:
+		return;
+	}
+
+	if (info->invflags & bit)
+		xt_xlate_add(xl, "!= ");
+
+	if (ports[0] == ports[1])
+		xt_xlate_add(xl, "%d ", ports[0]);
+	else
+		xt_xlate_add(xl, "%d-%d ", ports[0], ports[1]);
+}
+
+static void brip_xlate_nh(struct xt_xlate *xl,
+			  const struct ebt_ip6_info *info, int bit)
+{
+	struct in6_addr *addrp, *maskp;
+
+	if ((info->bitmask & bit) == 0)
+		return;
+
+	switch (bit) {
+	case EBT_IP6_SOURCE:
+		xt_xlate_add(xl, "ip6 saddr ");
+		addrp = (struct in6_addr *)&info->saddr;
+		maskp = (struct in6_addr *)&info->smsk;
+		break;
+	case EBT_IP6_DEST:
+		xt_xlate_add(xl, "ip6 daddr ");
+		addrp = (struct in6_addr *)&info->daddr;
+		maskp = (struct in6_addr *)&info->dmsk;
+		break;
+	default:
+		return;
+	}
+
+	if (info->invflags & bit)
+		xt_xlate_add(xl, "!= ");
+
+	xt_xlate_add(xl, "%s%s ", xtables_ip6addr_to_numeric(addrp),
+				  xtables_ip6mask_to_numeric(maskp));
+}
+
+static const char *brip6_xlate_proto_to_name(uint8_t proto)
+{
+	switch (proto) {
+	case IPPROTO_TCP:
+		return "tcp";
+	case IPPROTO_UDP:
+		return "udp";
+	case IPPROTO_UDPLITE:
+		return "udplite";
+	case IPPROTO_SCTP:
+		return "sctp";
+	case IPPROTO_DCCP:
+		return "dccp";
+	default:
+		return NULL;
+	}
+}
+
+static int brip6_xlate(struct xt_xlate *xl,
+		      const struct xt_xlate_mt_params *params)
+{
+	const struct ebt_ip6_info *info = (const void *)params->match->data;
+	const char *pname = NULL;
+
+	if ((info->bitmask & (EBT_IP6_SOURCE|EBT_IP6_DEST|EBT_IP6_ICMP6|EBT_IP6_TCLASS)) == 0)
+		xt_xlate_add(xl, "ether type ip6 ");
+
+	brip_xlate_nh(xl, info, EBT_IP6_SOURCE);
+	brip_xlate_nh(xl, info, EBT_IP6_DEST);
+
+	if (info->bitmask & EBT_IP6_TCLASS) {
+		xt_xlate_add(xl, "ip6 dscp ");
+		if (info->invflags & EBT_IP6_TCLASS)
+			xt_xlate_add(xl, "!= ");
+		xt_xlate_add(xl, "0x%02x ", info->tclass & 0x3f); /* remove ECN bits */
+	}
+
+	if (info->bitmask & EBT_IP6_PROTO) {
+		struct protoent *pe;
+
+		if (info->bitmask & (EBT_IP6_SPORT|EBT_IP6_DPORT) &&
+		    (info->invflags & EBT_IP6_PROTO) == 0) {
+			/* port number given and not inverted, no need to
+			 * add explicit 'meta l4proto'.
+			 */
+			pname = brip6_xlate_proto_to_name(info->protocol);
+		} else {
+			xt_xlate_add(xl, "meta l4proto ");
+			if (info->invflags & EBT_IP6_PROTO)
+				xt_xlate_add(xl, "!= ");
+			pe = getprotobynumber(info->protocol);
+			if (pe == NULL)
+				xt_xlate_add(xl, "%d ", info->protocol);
+			else
+				xt_xlate_add(xl, "%s ", pe->p_name);
+		}
+	}
+
+	brip_xlate_th(xl, info, EBT_IP6_SPORT, pname);
+	brip_xlate_th(xl, info, EBT_IP6_DPORT, pname);
+
+	if (info->bitmask & EBT_IP6_ICMP6) {
+		xt_xlate_add(xl, "icmpv6 type ");
+		if (info->invflags & EBT_IP6_ICMP6)
+			xt_xlate_add(xl, "!= ");
+
+		if (info->icmpv6_type[0] == info->icmpv6_type[1])
+			xt_xlate_add(xl, "%d ", info->icmpv6_type[0]);
+		else
+			xt_xlate_add(xl, "%d-%d ", info->icmpv6_type[0],
+						   info->icmpv6_type[1]);
+
+		if (info->icmpv6_code[0] == 0 &&
+		    info->icmpv6_code[1] == 0xff)
+			return 1;
+
+		xt_xlate_add(xl, "icmpv6 code ");
+		if (info->invflags & EBT_IP6_ICMP6)
+			xt_xlate_add(xl, "!= ");
+
+		if (info->icmpv6_code[0] == info->icmpv6_code[1])
+			xt_xlate_add(xl, "%d ", info->icmpv6_code[0]);
+		else
+			xt_xlate_add(xl, "%d-%d ", info->icmpv6_code[0],
+						   info->icmpv6_code[1]);
+	}
+
+	return 1;
+}
+
+static struct xtables_match brip6_match = {
+	.name		= "ip6",
+	.revision	= 0,
+	.version	= XTABLES_VERSION,
+	.family		= NFPROTO_BRIDGE,
+	.size		= XT_ALIGN(sizeof(struct ebt_ip6_info)),
+	.userspacesize	= XT_ALIGN(sizeof(struct ebt_ip6_info)),
+	.init		= brip6_init,
+	.help		= brip6_print_help,
+	.parse		= brip6_parse,
+	.final_check	= brip6_final_check,
+	.print		= brip6_print,
+	.xlate		= brip6_xlate,
+	.extra_opts	= brip6_opts,
+};
+
+void _init(void)
+{
+	xtables_register_match(&brip6_match);
+}
diff --git a/extensions/libebt_ip6.txlate b/extensions/libebt_ip6.txlate
new file mode 100644
index 00000000..0f2efdf8
--- /dev/null
+++ b/extensions/libebt_ip6.txlate
@@ -0,0 +1,29 @@
+ebtables-translate -A FORWARD --ip6-src ! dead::beef/64 -j ACCEPT
+nft add rule bridge filter FORWARD ip6 saddr != dead::/64 counter accept
+
+ebtables-translate -A FORWARD ! --ip6-dst dead:beef::/64 -j ACCEPT
+nft add rule bridge filter FORWARD ip6 daddr != dead:beef::/64 counter accept
+
+ebtables-translate -I FORWARD --ip6-dst f00:ba::
+nft insert rule bridge filter FORWARD ip6 daddr f00:ba:: counter
+
+ebtables-translate -I OUTPUT -o eth0 --ip6-tclass 0xff
+nft insert rule bridge filter OUTPUT oifname "eth0" ip6 dscp 0x3f counter
+
+ebtables-translate -A FORWARD --ip6-proto tcp --ip6-dport 22
+nft add rule bridge filter FORWARD ether type ip6 tcp dport 22 counter
+
+ebtables-translate -A FORWARD --ip6-proto udp --ip6-sport 1024:65535
+nft add rule bridge filter FORWARD ether type ip6 udp sport 1024-65535 counter
+
+ebtables-translate -A FORWARD --ip6-proto 253
+nft add rule bridge filter FORWARD ether type ip6 meta l4proto 253 counter
+
+ebtables-translate -A FORWARD --ip6-icmp-type "echo-request"
+nft add rule bridge filter FORWARD icmpv6 type 128 counter
+
+ebtables-translate -A FORWARD --ip6-icmp-type 1/1
+nft add rule bridge filter FORWARD icmpv6 type 1 icmpv6 code 1 counter
+
+ebtables-translate -A FORWARD --ip6-icmp-type ! 1:10
+nft add rule bridge filter FORWARD icmpv6 type != 1-10 counter