| 0,0 → 1,235 |
|---|
| /*!\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 */ |