--- /dev/null
+/*!\file netinet6/ip6_fw.h
+ *
+ */
+
+/* $FreeBSD: src/sys/netinet6/ip6_fw.h,v 1.12 2002/04/19 04:46:22 suz Exp $ */
+/* $KAME: ip6_fw.h,v 1.9 2001/08/01 04:29:57 sumikawa Exp $ */
+
+/*
+ * Copyright (C) 1998, 1999, 2000 and 2001 WIDE Project.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the project nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * Copyright (c) 1993 Daniel Boulet
+ * Copyright (c) 1994 Ugen J.S.Antsilevich
+ *
+ * Redistribution and use in source forms, with and without modification,
+ * are permitted provided that this entire comment appears intact.
+ *
+ * Redistribution in binary form may occur without any restrictions.
+ * Obviously, it would be nice if you gave credit where credit is due
+ * but requiring it would be too onerous.
+ *
+ * This software is provided ``AS IS'' without any warranties of any kind.
+ *
+ */
+
+#ifndef _IP6_FW_H
+#define _IP6_FW_H
+
+#include <net/if.h>
+
+/*
+ * This union structure identifies an interface, either explicitly
+ * by name or implicitly by IP address. The flags IP_FW_F_IIFNAME
+ * and IP_FW_F_OIFNAME say how to interpret this structure. An
+ * interface unit number of -1 matches any unit number, while an
+ * IP address of 0.0.0.0 indicates matches any interface.
+ *
+ * The receive and transmit interfaces are only compared against the
+ * the packet if the corresponding bit (IP_FW_F_IIFACE or IP_FW_F_OIFACE)
+ * is set. Note some packets lack a receive or transmit interface
+ * (in which case the missing "interface" never matches).
+ */
+
+union ip6_fw_if {
+ struct in6_addr fu_via_ip6; /* Specified by IPv6 address */
+ struct { /* Specified by interface name */
+#define IP6FW_IFNLEN IFNAMSIZ
+ char name[IP6FW_IFNLEN];
+ short unit; /* -1 means match any unit */
+ } fu_via_if;
+};
+
+/*
+ * Format of an IP firewall descriptor
+ *
+ * fw_src, fw_dst, fw_smsk, fw_dmsk are always stored in network byte order.
+ * fw_flg and fw_n*p are stored in host byte order (of course).
+ * Port numbers are stored in HOST byte order.
+ * Warning: setsockopt() will fail if sizeof(struct ip_fw) > MLEN (108)
+ */
+
+struct ip6_fw {
+ u_long fw_pcnt,fw_bcnt; /* Packet and byte counters */
+ struct in6_addr fw_src, fw_dst; /* Source and destination IPv6 addr */
+ struct in6_addr fw_smsk, fw_dmsk; /* Mask for src and dest IPv6 addr */
+ u_short fw_number; /* Rule number */
+ u_short fw_flg; /* Flags word */
+#define IPV6_FW_MAX_PORTS 10 /* A reasonable maximum */
+ u_int fw_ipflg; /* IP flags word */
+ u_short fw_pts[IPV6_FW_MAX_PORTS]; /* Array of port numbers to match */
+ u_char fw_ip6opt,fw_ip6nopt; /* IPv6 options set/unset */
+ u_char fw_tcpf,fw_tcpnf; /* TCP flags set/unset */
+#define IPV6_FW_ICMPTYPES_DIM (256 / (sizeof(unsigned) * 8))
+ unsigned fw_icmp6types[IPV6_FW_ICMPTYPES_DIM]; /* ICMP types bitmap */
+ long timestamp; /* timestamp (tv_sec) of last match */
+ union ip6_fw_if fw_in_if, fw_out_if;/* Incoming and outgoing interfaces */
+ union {
+ u_short fu_divert_port; /* Divert/tee port (options IP6DIVERT) */
+ u_short fu_skipto_rule; /* SKIPTO command rule number */
+ u_short fu_reject_code; /* REJECT response code */
+ } fw_un;
+ u_char fw_prot; /* IPv6 protocol */
+ u_char fw_nports; /* N'of src ports and # of dst ports */
+ /* in ports array (dst ports follow */
+ /* src ports; max of 10 ports in all; */
+ /* count of 0 means match all ports) */
+};
+
+#define IPV6_FW_GETNSRCP(rule) ((rule)->fw_nports & 0x0f)
+#define IPV6_FW_SETNSRCP(rule, n) do { \
+ (rule)->fw_nports &= ~0x0f; \
+ (rule)->fw_nports |= (n); \
+ } while (0)
+#define IPV6_FW_GETNDSTP(rule) ((rule)->fw_nports >> 4)
+#define IPV6_FW_SETNDSTP(rule, n) do { \
+ (rule)->fw_nports &= ~0xf0; \
+ (rule)->fw_nports |= (n) << 4;\
+ } while (0)
+
+#define fw_divert_port fw_un.fu_divert_port
+#define fw_skipto_rule fw_un.fu_skipto_rule
+#define fw_reject_code fw_un.fu_reject_code
+
+struct ip6_fw_chain {
+ LIST_ENTRY(ip6_fw_chain) chain;
+ struct ip6_fw *rule;
+};
+
+/*
+ * Values for "flags" field .
+ */
+#define IPV6_FW_F_IN 0x0001 /* Check inbound packets */
+#define IPV6_FW_F_OUT 0x0002 /* Check outbound packets */
+#define IPV6_FW_F_IIFACE 0x0004 /* Apply inbound interface test */
+#define IPV6_FW_F_OIFACE 0x0008 /* Apply outbound interface test */
+
+#define IPV6_FW_F_COMMAND 0x0070 /* Mask for type of chain entry: */
+#define IPV6_FW_F_DENY 0x0000 /* This is a deny rule */
+#define IPV6_FW_F_REJECT 0x0010 /* Deny and send a response packet */
+#define IPV6_FW_F_ACCEPT 0x0020 /* This is an accept rule */
+#define IPV6_FW_F_COUNT 0x0030 /* This is a count rule */
+#define IPV6_FW_F_DIVERT 0x0040 /* This is a divert rule */
+#define IPV6_FW_F_TEE 0x0050 /* This is a tee rule */
+#define IPV6_FW_F_SKIPTO 0x0060 /* This is a skipto rule */
+
+#define IPV6_FW_F_PRN 0x0080 /* Print if this rule matches */
+
+#define IPV6_FW_F_SRNG 0x0100 /* The first two src ports are a min *
+ * and max range (stored in host byte *
+ * order). */
+
+#define IPV6_FW_F_DRNG 0x0200 /* The first two dst ports are a min *
+ * and max range (stored in host byte *
+ * order). */
+
+#define IPV6_FW_F_IIFNAME 0x0400 /* In interface by name/unit (not IP) */
+#define IPV6_FW_F_OIFNAME 0x0800 /* Out interface by name/unit (not IP) */
+
+#define IPV6_FW_F_INVSRC 0x1000 /* Invert sense of src check */
+#define IPV6_FW_F_INVDST 0x2000 /* Invert sense of dst check */
+
+#define IPV6_FW_F_FRAG 0x4000 /* Fragment */
+
+#define IPV6_FW_F_ICMPBIT 0x8000 /* ICMP type bitmap is valid */
+
+#define IPV6_FW_F_MASK 0xFFFF /* All possible flag bits mask */
+
+/*
+ * Flags for the 'fw_ipflg' field, for comparing values of ip and its protocols. */
+#define IPV6_FW_IF_TCPEST 0x00000020 /* established TCP connection */
+#define IPV6_FW_IF_TCPMSK 0x00000020 /* mask of all TCP values */
+
+/*
+ * For backwards compatibility with rules specifying "via iface" but
+ * not restricted to only "in" or "out" packets, we define this combination
+ * of bits to represent this configuration.
+ */
+
+#define IF6_FW_F_VIAHACK (IPV6_FW_F_IN|IPV6_FW_F_OUT|IPV6_FW_F_IIFACE|IPV6_FW_F_OIFACE)
+
+/*
+ * Definitions for REJECT response codes.
+ * Values less than 256 correspond to ICMP unreachable codes.
+ */
+#define IPV6_FW_REJECT_RST 0x0100 /* TCP packets: send RST */
+
+/*
+ * Definitions for IPv6 option names.
+ */
+#define IPV6_FW_IP6OPT_HOPOPT 0x01
+#define IPV6_FW_IP6OPT_ROUTE 0x02
+#define IPV6_FW_IP6OPT_FRAG 0x04
+#define IPV6_FW_IP6OPT_ESP 0x08
+#define IPV6_FW_IP6OPT_AH 0x10
+#define IPV6_FW_IP6OPT_NONXT 0x20
+#define IPV6_FW_IP6OPT_OPTS 0x40
+
+/*
+ * Definitions for TCP flags.
+ */
+#define IPV6_FW_TCPF_FIN TH_FIN
+#define IPV6_FW_TCPF_SYN TH_SYN
+#define IPV6_FW_TCPF_RST TH_RST
+#define IPV6_FW_TCPF_PSH TH_PUSH
+#define IPV6_FW_TCPF_ACK TH_ACK
+#define IPV6_FW_TCPF_URG TH_URG
+
+/*
+ * Main firewall chains definitions and global var's definitions.
+ */
+#ifdef _KERNEL
+
+/*
+ * Function definitions.
+ */
+void ip6_fw_init(void);
+
+/* Firewall hooks */
+struct ip6_hdr;
+typedef int ip6_fw_chk_t __P((struct ip6_hdr**, struct ifnet*,
+ u_short *, struct mbuf**));
+typedef int ip6_fw_ctl_t __P((int, struct mbuf**));
+extern ip6_fw_chk_t *ip6_fw_chk_ptr;
+extern ip6_fw_ctl_t *ip6_fw_ctl_ptr;
+extern int ip6_fw_enable;
+
+#endif /* _KERNEL */
+
+#endif /* _IP6_FW_H */
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