/* * Copyright (C) 1997 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. * * $Id: ip_proxy.h,v 2.0.2.10 1997/10/19 15:39:23 darrenr Exp $ */ #ifndef __IP_PROXY_H__ #define __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; /* seqoff/after set selector */ short apt_seqoff[2]; /* sequence # difference */ tcp_seq apt_after[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; struct in_addr aps_src; /* source IP# */ struct in_addr aps_dst; /* destination IP# */ u_char aps_p; /* protocol */ union { struct ap_tcp apu_tcp; struct ap_udp apu_udp; } aps_un; u_int aps_flags; QUAD_T aps_bytes; /* bytes sent */ QUAD_T aps_pkts; /* packets sent */ u_long aps_tout; /* time left before expiring */ void *aps_data; /* private data */ int aps_psiz; /* size of private data */ 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_after aps_un.apu_tcp.apt_after #define aps_state aps_un.apu_tcp.apt_state 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((fr_info_t *, ip_t *, tcphdr_t *, ap_session_t *, struct nat *)); int (* apr_inpkt) __P((fr_info_t *, ip_t *, tcphdr_t *, ap_session_t *, struct nat *)); int (* apr_outpkt) __P((fr_info_t *, ip_t *, tcphdr_t *, ap_session_t *, struct nat *)); } aproxy_t; #define APR_DELETE 1 extern ap_session_t *ap_sess_tab[AP_SESS_SIZE]; extern aproxy_t ap_proxies[]; extern int ap_ok __P((ip_t *, tcphdr_t *, struct ipnat *)); extern void ap_unload __P((void)); extern void ap_free __P((aproxy_t *)); extern void aps_free __P((ap_session_t *)); extern int ap_check __P((ip_t *, tcphdr_t *, fr_info_t *, struct nat *)); extern aproxy_t *ap_match __P((u_char, char *)); #endif /* __IP_PROXY_H__ */