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157 lines
4.0 KiB
C
157 lines
4.0 KiB
C
/*
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* Copyright (C) 1997-2000 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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* $Id: ip_proxy.h,v 2.1.2.1 1999/09/19 12:18:20 darrenr Exp $
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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[2]; /* {seq,ack}{off,min} set selector */
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short apt_seqoff[2]; /* sequence # difference */
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tcp_seq apt_seqmin[2]; /* don't change seq-off until after this */
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short apt_ackoff[2]; /* sequence # difference */
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tcp_seq apt_ackmin[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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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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U_QUAD_T aps_bytes; /* bytes sent */
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U_QUAD_T aps_pkts; /* packets sent */
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void *aps_nat; /* pointer back to nat struct */
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void *aps_data; /* private data */
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int aps_p; /* protocol */
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int aps_psiz; /* size of private data */
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struct ap_session *aps_hnext;
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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_seqmin aps_un.apu_tcp.apt_seqmin
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#define aps_state aps_un.apu_tcp.apt_state
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#define aps_ackoff aps_un.apu_tcp.apt_ackoff
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#define aps_ackmin aps_un.apu_tcp.apt_ackmin
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typedef struct aproxy {
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struct aproxy *apr_next;
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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((void));
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void (* apr_fini) __P((void));
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int (* apr_new) __P((fr_info_t *, ip_t *,
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ap_session_t *, struct nat *));
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int (* apr_inpkt) __P((fr_info_t *, ip_t *,
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ap_session_t *, struct nat *));
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int (* apr_outpkt) __P((fr_info_t *, ip_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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#define APR_ERR(x) (((x) & 0xffff) << 16)
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#define APR_EXIT(x) (((x) >> 16) & 0xffff)
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#define APR_INC(x) ((x) & 0xffff)
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#define FTP_BUFSZ 160
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/*
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* For the ftp proxy.
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*/
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typedef struct ftpside {
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char *ftps_rptr;
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char *ftps_wptr;
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u_32_t ftps_seq;
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int ftps_junk;
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char ftps_buf[FTP_BUFSZ];
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} ftpside_t;
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typedef struct ftpinfo {
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u_int ftp_passok;
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ftpside_t ftp_side[2];
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} ftpinfo_t;
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/*
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* Real audio proxy structure and #defines
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*/
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typedef struct {
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int rap_seenpna;
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int rap_seenver;
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int rap_version;
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int rap_eos; /* End Of Startup */
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int rap_gotid;
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int rap_gotlen;
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int rap_mode;
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int rap_sdone;
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u_short rap_plport;
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u_short rap_prport;
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u_short rap_srport;
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char rap_svr[19];
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u_32_t rap_sbf; /* flag to indicate which of the 19 bytes have
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* been filled
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*/
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tcp_seq rap_sseq;
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} raudio_t;
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#define RA_ID_END 0
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#define RA_ID_UDP 1
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#define RA_ID_ROBUST 7
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#define RAP_M_UDP 1
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#define RAP_M_ROBUST 2
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#define RAP_M_TCP 4
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#define RAP_M_UDP_ROBUST (RAP_M_UDP|RAP_M_ROBUST)
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extern ap_session_t *ap_sess_tab[AP_SESS_SIZE];
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extern ap_session_t *ap_sess_list;
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extern aproxy_t ap_proxies[];
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extern int ippr_ftp_pasvonly;
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extern int appr_add __P((aproxy_t *));
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extern int appr_del __P((aproxy_t *));
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extern int appr_init __P((void));
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extern void appr_unload __P((void));
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extern int appr_ok __P((ip_t *, tcphdr_t *, struct ipnat *));
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extern void appr_free __P((aproxy_t *));
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extern void aps_free __P((ap_session_t *));
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extern int appr_check __P((ip_t *, fr_info_t *, struct nat *));
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extern aproxy_t *appr_match __P((u_int, char *));
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#endif /* __IP_PROXY_H__ */
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