diff options
Diffstat (limited to 'newlib/libc/sys/linux/include/netinet6/ip6_fw.h')
-rw-r--r-- | newlib/libc/sys/linux/include/netinet6/ip6_fw.h | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/newlib/libc/sys/linux/include/netinet6/ip6_fw.h b/newlib/libc/sys/linux/include/netinet6/ip6_fw.h new file mode 100644 index 000000000..ee3aa818f --- /dev/null +++ b/newlib/libc/sys/linux/include/netinet6/ip6_fw.h @@ -0,0 +1,231 @@ +/* $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 */ |