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//==========================================================================

//

//      include/netinet/ip_proxy.h

//

//      

//

//==========================================================================

//####BSDCOPYRIGHTBEGIN####

//

// -------------------------------------------

//

// Portions of this software may have been derived from OpenBSD or other sources,

// and are covered by the appropriate copyright disclaimers included herein.

//

// -------------------------------------------

//

//####BSDCOPYRIGHTEND####

//==========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):    gthomas

// Contributors: gthomas

// Date:         2000-01-10

// Purpose:      

// Description:  

//              

//

//####DESCRIPTIONEND####

//

//==========================================================================

/* $OpenBSD: ip_proxy.h,v 1.4 1999/12/15 05:20:23 kjell Exp $ */

/*

 * Copyright (C) 1997-1998 by Darren Reed.

 *

 * Redistribution and use in source and binary forms are permitted

 * provided that this notice is preserved and due credit is given

 * to the original author and the contributors.

 *

 */

#ifndef _NETINET_IP_PROXY_H__

#define _NETINET_IP_PROXY_H__

#ifndef SOLARIS

#define SOLARIS (defined(sun) && (defined(__svr4__) || defined(__SVR4)))

#endif

#ifndef APR_LABELLEN

#define APR_LABELLEN    16

#endif

#define AP_SESS_SIZE    53

struct  nat;

struct  ipnat;

typedef struct  ap_tcp {

        u_short apt_sport;      /* source port */

        u_short apt_dport;      /* destination port */

        short   apt_sel[2];     /* {seq,ack}{off,min} set selector */

        short   apt_seqoff[2];  /* sequence # difference */

        tcp_seq apt_seqmin[2];  /* don't change seq-off until after this */

        short   apt_ackoff[2];  /* sequence # difference */

        tcp_seq apt_ackmin[2];  /* don't change seq-off until after this */

        u_char  apt_state[2];   /* connection state */

} ap_tcp_t;

typedef struct  ap_udp {

        u_short apu_sport;      /* source port */

        u_short apu_dport;      /* destination port */

} ap_udp_t;

typedef struct ap_session {

        struct  aproxy  *aps_apr;

        union {

                struct  ap_tcp  apu_tcp;

                struct  ap_udp  apu_udp;

        } aps_un;

        u_int   aps_flags;

        U_QUAD_T aps_bytes;     /* bytes sent */

        U_QUAD_T aps_pkts;      /* packets sent */

        void    *aps_nat;       /* pointer back to nat struct */

        void    *aps_data;      /* private data */

        int     aps_p;          /* protocol */

        int     aps_psiz;       /* size of private data */

        struct  ap_session      *aps_hnext;

        struct  ap_session      *aps_next;

} ap_session_t ;

#define aps_sport       aps_un.apu_tcp.apt_sport

#define aps_dport       aps_un.apu_tcp.apt_dport

#define aps_sel         aps_un.apu_tcp.apt_sel

#define aps_seqoff      aps_un.apu_tcp.apt_seqoff

#define aps_seqmin      aps_un.apu_tcp.apt_seqmin

#define aps_state       aps_un.apu_tcp.apt_state

#define aps_ackoff      aps_un.apu_tcp.apt_ackoff

#define aps_ackmin      aps_un.apu_tcp.apt_ackmin

typedef struct  aproxy  {

        char    apr_label[APR_LABELLEN];        /* Proxy label # */

        u_char  apr_p;          /* protocol */

        int     apr_ref;        /* +1 per rule referencing it */

        int     apr_flags;

        int     (* apr_init) __P((void));

        int     (* apr_new) __P((fr_info_t *, ip_t *,

                                 ap_session_t *, struct nat *));

        int     (* apr_inpkt) __P((fr_info_t *, ip_t *,

                                   ap_session_t *, struct nat *));

        int     (* apr_outpkt) __P((fr_info_t *, ip_t *,

                                    ap_session_t *, struct nat *));

} aproxy_t;

#define APR_DELETE      1

/*

 * Real audio proxy structure and #defines

 */

typedef struct  {

        int     rap_seenpna;

        int     rap_seenver;

        int     rap_version;

        int     rap_eos;        /* End Of Startup */

        int     rap_gotid;

        int     rap_gotlen;

        int     rap_mode;

        int     rap_sdone;

        u_short rap_plport;

        u_short rap_prport;

        u_short rap_srport;

        char    rap_svr[19];

        u_32_t  rap_sbf;        /* flag to indicate which of the 19 bytes have

                                 * been filled

                                 */

        tcp_seq rap_sseq;

} raudio_t;

#define RA_ID_END       0

#define RA_ID_UDP       1

#define RA_ID_ROBUST    7

#define RAP_M_UDP       1

#define RAP_M_ROBUST    2

#define RAP_M_TCP       4

#define RAP_M_UDP_ROBUST        (RAP_M_UDP|RAP_M_ROBUST)

extern  ap_session_t    *ap_sess_tab[AP_SESS_SIZE];

extern  ap_session_t    *ap_sess_list;

extern  aproxy_t        ap_proxies[];

extern  int     appr_init __P((void));

extern  int     appr_ok __P((ip_t *, tcphdr_t *, struct ipnat *));

extern  void    appr_free __P((aproxy_t *));

extern  void    aps_free __P((ap_session_t *));

extern  int     appr_check __P((ip_t *, fr_info_t *, struct nat *));

extern  aproxy_t        *appr_match __P((u_int, char *));

#endif /* _NETINET_IP_PROXY_H__ */