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Annotation of XNU/bsd/netinet/ip_proxy.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * The contents of this file constitute Original Code as defined in and
        !             7:  * are subject to the Apple Public Source License Version 1.1 (the
        !             8:  * "License").  You may not use this file except in compliance with the
        !             9:  * License.  Please obtain a copy of the License at
        !            10:  * http://www.apple.com/publicsource and read it before using this file.
        !            11:  * 
        !            12:  * This Original Code and all software distributed under the License are
        !            13:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            14:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            15:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            16:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            17:  * License for the specific language governing rights and limitations
        !            18:  * under the License.
        !            19:  * 
        !            20:  * @APPLE_LICENSE_HEADER_END@
        !            21:  */
        !            22: /*
        !            23:  * Copyright (C) 1997 by Darren Reed.
        !            24:  *
        !            25:  * Redistribution and use in source and binary forms are permitted
        !            26:  * provided that this notice is preserved and due credit is given
        !            27:  * to the original author and the contributors.
        !            28:  *
        !            29:  */
        !            30: 
        !            31: #ifndef        __IP_PROXY_H__
        !            32: #define        __IP_PROXY_H__
        !            33: 
        !            34: #ifndef SOLARIS
        !            35: #define SOLARIS (defined(sun) && (defined(__svr4__) || defined(__SVR4)))
        !            36: #endif
        !            37: 
        !            38: #ifndef        APR_LABELLEN
        !            39: #define        APR_LABELLEN    16
        !            40: #endif
        !            41: #define        AP_SESS_SIZE    53
        !            42: 
        !            43: struct nat;
        !            44: struct ipnat;
        !            45: 
        !            46: typedef        struct  ap_tcp {
        !            47:        u_short apt_sport;      /* source port */
        !            48:        u_short apt_dport;      /* destination port */
        !            49:        short   apt_sel;        /* seqoff/after set selector */
        !            50:        short   apt_seqoff[2];  /* sequence # difference */
        !            51:        tcp_seq apt_after[2];   /* don't change seq-off until after this */
        !            52:        u_char  apt_state[2];   /* connection state */
        !            53: } ap_tcp_t;
        !            54: 
        !            55: typedef        struct  ap_udp {
        !            56:        u_short apu_sport;      /* source port */
        !            57:        u_short apu_dport;      /* destination port */
        !            58: } ap_udp_t;
        !            59: 
        !            60: typedef        struct ap_session {
        !            61:        struct  aproxy  *aps_apr;
        !            62:        struct  in_addr aps_src;        /* source IP# */
        !            63:        struct  in_addr aps_dst;        /* destination IP# */
        !            64:        u_char  aps_p;          /* protocol */
        !            65:        union {
        !            66:                struct  ap_tcp  apu_tcp;
        !            67:                struct  ap_udp  apu_udp;
        !            68:        } aps_un;
        !            69:        u_int   aps_flags;
        !            70:        QUAD_T  aps_bytes;      /* bytes sent */
        !            71:        QUAD_T  aps_pkts;       /* packets sent */
        !            72:        u_long  aps_tout;       /* time left before expiring */
        !            73:        void    *aps_data;      /* private data */
        !            74:        int     aps_psiz;       /* size of private data */
        !            75:        struct  ap_session      *aps_next;
        !            76: } ap_session_t ;
        !            77: 
        !            78: #define        aps_sport       aps_un.apu_tcp.apt_sport
        !            79: #define        aps_dport       aps_un.apu_tcp.apt_dport
        !            80: #define        aps_sel         aps_un.apu_tcp.apt_sel
        !            81: #define        aps_seqoff      aps_un.apu_tcp.apt_seqoff
        !            82: #define        aps_after       aps_un.apu_tcp.apt_after
        !            83: #define        aps_state       aps_un.apu_tcp.apt_state
        !            84: 
        !            85: 
        !            86: typedef        struct  aproxy  {
        !            87:        char    apr_label[APR_LABELLEN];        /* Proxy label # */
        !            88:        u_char  apr_p;          /* protocol */
        !            89:        int     apr_ref;        /* +1 per rule referencing it */
        !            90:        int     apr_flags;
        !            91:        int     (* apr_init) __P((fr_info_t *, ip_t *, tcphdr_t *,
        !            92:                                   ap_session_t *, struct nat *));
        !            93:        int     (* apr_inpkt) __P((fr_info_t *, ip_t *, tcphdr_t *,
        !            94:                                   ap_session_t *, struct nat *));
        !            95:        int     (* apr_outpkt) __P((fr_info_t *, ip_t *, tcphdr_t *,
        !            96:                                    ap_session_t *, struct nat *));
        !            97: } aproxy_t;
        !            98: 
        !            99: #define        APR_DELETE      1
        !           100: 
        !           101: 
        !           102: extern ap_session_t    *ap_sess_tab[AP_SESS_SIZE];
        !           103: extern aproxy_t        ap_proxies[];
        !           104: 
        !           105: extern int     ap_ok __P((ip_t *, tcphdr_t *, struct ipnat *));
        !           106: extern void    ap_unload __P((void));
        !           107: extern void    ap_free __P((aproxy_t *));
        !           108: extern void    aps_free __P((ap_session_t *));
        !           109: extern int     ap_check __P((ip_t *, tcphdr_t *, fr_info_t *, struct nat *));
        !           110: extern aproxy_t        *ap_match __P((u_char, char *));
        !           111: extern void    ap_expire __P((void));
        !           112: 
        !           113: #endif /* __IP_PROXY_H__ */

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