FreeBSD/Linux Kernel Cross Reference
sys/bsd/netinet6/ip6_fw.h

     /*
      * Copyright (c) 2002 Apple Computer, Inc. All rights reserved.
      *
      * @APPLE_LICENSE_HEADER_START@
      * 
      * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
      * 
      * This file contains Original Code and/or Modifications of Original Code
      * as defined in and that are subject to the Apple Public Source License
     * Version 2.0 (the 'License'). You may not use this file except in
     * compliance with the License. Please obtain a copy of the License at
     * http://www.opensource.apple.com/apsl/ and read it before using this
     * file.
     * 
     * The Original Code and all software distributed under the License are
     * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
     * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
     * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
     * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
     * Please see the License for the specific language governing rights and
     * limitations under the License.
     * 
     * @APPLE_LICENSE_HEADER_END@
     */
    /*
     * 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 <sys/appleapiopts.h>
    
    #include <net/if.h>
    
    #define IPV6_FW_CURRENT_API_VERSION 20  /* Version of this API */
    
    
    /*
     * 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_int32_t version;              /* Version of this structure.  Should always be */
                                                            /* set to IP6_FW_CURRENT_API_VERSION by clients. */
            void *context;                  /* Context that is usable by user processes to */
                                                            /* identify this rule. */
        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
   #ifdef __APPLE_API_PRIVATE
   
   #define M_IP6FW M_IPFW
   
   
   /*
    * Function definitions.
    */
   void ip6_fw_init(void);
   
   /* Firewall hooks */
   struct ip6_hdr;
   struct sockopt;
   typedef int ip6_fw_chk_t __P((struct ip6_hdr**, struct ifnet*,
                                   u_short *, struct mbuf**));
   typedef int ip6_fw_ctl_t __P((struct sockopt *));
   extern  ip6_fw_chk_t *ip6_fw_chk_ptr;
   extern  ip6_fw_ctl_t *ip6_fw_ctl_ptr;
   extern  int ip6_fw_enable;
   
   #endif /* __APPLE_API_PRIVATE */
   #endif /* KERNEL */
   
   #endif /* _IP6_FW_H */

Cache object: f475ea959da0834e214ee16f4985a208