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94 lines
2.6 KiB
C
94 lines
2.6 KiB
C
/*
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* Copyright (C) 1997 by Darren Reed.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that this notice is preserved and due credit is given
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* to the original author and the contributors.
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*
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* $FreeBSD$
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*/
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#ifndef __IP_PROXY_H__
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#define __IP_PROXY_H__
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#ifndef SOLARIS
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#define SOLARIS (defined(sun) && (defined(__svr4__) || defined(__SVR4)))
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#endif
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#ifndef APR_LABELLEN
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#define APR_LABELLEN 16
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#endif
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#define AP_SESS_SIZE 53
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struct nat;
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struct ipnat;
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typedef struct ap_tcp {
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u_short apt_sport; /* source port */
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u_short apt_dport; /* destination port */
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short apt_sel; /* seqoff/after set selector */
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short apt_seqoff[2]; /* sequence # difference */
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tcp_seq apt_after[2]; /* don't change seq-off until after this */
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u_char apt_state[2]; /* connection state */
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} ap_tcp_t;
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typedef struct ap_udp {
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u_short apu_sport; /* source port */
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u_short apu_dport; /* destination port */
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} ap_udp_t;
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typedef struct ap_session {
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struct aproxy *aps_apr;
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struct in_addr aps_src; /* source IP# */
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struct in_addr aps_dst; /* destination IP# */
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u_char aps_p; /* protocol */
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union {
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struct ap_tcp apu_tcp;
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struct ap_udp apu_udp;
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} aps_un;
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u_int aps_flags;
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QUAD_T aps_bytes; /* bytes sent */
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QUAD_T aps_pkts; /* packets sent */
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u_long aps_tout; /* time left before expiring */
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void *aps_data; /* private data */
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int aps_psiz; /* size of private data */
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struct ap_session *aps_next;
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} ap_session_t ;
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#define aps_sport aps_un.apu_tcp.apt_sport
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#define aps_dport aps_un.apu_tcp.apt_dport
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#define aps_sel aps_un.apu_tcp.apt_sel
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#define aps_seqoff aps_un.apu_tcp.apt_seqoff
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#define aps_after aps_un.apu_tcp.apt_after
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#define aps_state aps_un.apu_tcp.apt_state
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typedef struct aproxy {
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char apr_label[APR_LABELLEN]; /* Proxy label # */
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u_char apr_p; /* protocol */
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int apr_ref; /* +1 per rule referencing it */
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int apr_flags;
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int (* apr_init) __P((fr_info_t *, ip_t *, tcphdr_t *,
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ap_session_t *, struct nat *));
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int (* apr_inpkt) __P((fr_info_t *, ip_t *, tcphdr_t *,
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ap_session_t *, struct nat *));
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int (* apr_outpkt) __P((fr_info_t *, ip_t *, tcphdr_t *,
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ap_session_t *, struct nat *));
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} aproxy_t;
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#define APR_DELETE 1
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extern ap_session_t *ap_sess_tab[AP_SESS_SIZE];
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extern aproxy_t ap_proxies[];
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extern int ap_ok __P((ip_t *, tcphdr_t *, struct ipnat *));
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extern void ap_unload __P((void));
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extern void ap_free __P((aproxy_t *));
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extern void aps_free __P((ap_session_t *));
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extern int ap_check __P((ip_t *, tcphdr_t *, fr_info_t *, struct nat *));
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extern aproxy_t *ap_match __P((u_char, char *));
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extern void ap_expire __P((void));
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#endif /* __IP_PROXY_H__ */
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