/* * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * The contents of this file constitute Original Code as defined in and * are subject to the Apple Public Source License Version 1.1 (the * "License"). You may not use this file except in compliance with the * License. Please obtain a copy of the License at * http://www.apple.com/publicsource and read it before using this file. * * This Original Code and all software distributed under the License are * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the * License for the specific language governing rights and limitations * under the License. * * @APPLE_LICENSE_HEADER_END@ */ /*- * Copyright (c) 2001 Charles Mott * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * Based upon: * $FreeBSD: src/lib/libalias/alias_local.h,v 1.10.2.5 2001/08/01 09:52:26 obrien Exp $ */ /* * Alias_local.h contains the function prototypes for alias.c, * alias_db.c, alias_util.c and alias_ftp.c, alias_irc.c (as well * as any future add-ons). It also includes macros, globals and * struct definitions shared by more than one alias*.c file. * * This include file is intended to be used only within the aliasing * software. Outside world interfaces are defined in alias.h * * This software is placed into the public domain with no restrictions * on its distribution. * * Initial version: August, 1996 (cjm) * * */ #ifndef _ALIAS_LOCAL_H_ #define _ALIAS_LOCAL_H_ #ifndef NULL #define NULL 0 #endif /* Macros */ /* * The following macro is used to update an * internet checksum. "delta" is a 32-bit * accumulation of all the changes to the * checksum (adding in new 16-bit words and * subtracting out old words), and "cksum" * is the checksum value to be updated. */ #define ADJUST_CHECKSUM(acc, cksum) \ do { \ acc += cksum; \ if (acc < 0) { \ acc = -acc; \ acc = (acc >> 16) + (acc & 0xffff); \ acc += acc >> 16; \ cksum = (u_short) ~acc; \ } else { \ acc = (acc >> 16) + (acc & 0xffff); \ acc += acc >> 16; \ cksum = (u_short) acc; \ } \ } while (0) /* Globals */ extern int packetAliasMode; /* Structs */ struct alias_link; /* Incomplete structure */ /* Prototypes */ /* General utilities */ u_short IpChecksum(struct ip *); u_short TcpChecksum(struct ip *); void DifferentialChecksum(u_short *, u_short *, u_short *, int); /* Internal data access */ struct alias_link * FindIcmpIn(struct in_addr, struct in_addr, u_short, int); struct alias_link * FindIcmpOut(struct in_addr, struct in_addr, u_short, int); struct alias_link * FindFragmentIn1(struct in_addr, struct in_addr, u_short); struct alias_link * FindFragmentIn2(struct in_addr, struct in_addr, u_short); struct alias_link * AddFragmentPtrLink(struct in_addr, u_short); struct alias_link * FindFragmentPtr(struct in_addr, u_short); struct alias_link * FindProtoIn(struct in_addr, struct in_addr, u_char); struct alias_link * FindProtoOut(struct in_addr, struct in_addr, u_char); struct alias_link * FindUdpTcpIn (struct in_addr, struct in_addr, u_short, u_short, u_char, int); struct alias_link * FindUdpTcpOut(struct in_addr, struct in_addr, u_short, u_short, u_char, int); struct alias_link * AddPptp(struct in_addr, struct in_addr, struct in_addr, u_int16_t); struct alias_link * FindPptpOutByCallId(struct in_addr, struct in_addr, u_int16_t); struct alias_link * FindPptpInByCallId(struct in_addr, struct in_addr, u_int16_t); struct alias_link * FindPptpOutByPeerCallId(struct in_addr, struct in_addr, u_int16_t); struct alias_link * FindPptpInByPeerCallId(struct in_addr, struct in_addr, u_int16_t); struct alias_link * FindRtspOut(struct in_addr, struct in_addr, u_short, u_short, u_char); struct in_addr FindOriginalAddress(struct in_addr); struct in_addr FindAliasAddress(struct in_addr); /* External data access/modification */ int FindNewPortGroup(struct in_addr, struct in_addr, u_short, u_short, u_short, u_char, u_char); void GetFragmentAddr(struct alias_link *, struct in_addr *); void SetFragmentAddr(struct alias_link *, struct in_addr); void GetFragmentPtr(struct alias_link *, char **); void SetFragmentPtr(struct alias_link *, char *); void SetStateIn(struct alias_link *, int); void SetStateOut(struct alias_link *, int); int GetStateIn(struct alias_link *); int GetStateOut(struct alias_link *); struct in_addr GetOriginalAddress(struct alias_link *); struct in_addr GetDestAddress(struct alias_link *); struct in_addr GetAliasAddress(struct alias_link *); struct in_addr GetDefaultAliasAddress(void); void SetDefaultAliasAddress(struct in_addr); u_short GetOriginalPort(struct alias_link *); u_short GetAliasPort(struct alias_link *); struct in_addr GetProxyAddress(struct alias_link *); void SetProxyAddress(struct alias_link *, struct in_addr); u_short GetProxyPort(struct alias_link *); void SetProxyPort(struct alias_link *, u_short); void SetAckModified(struct alias_link *); int GetAckModified(struct alias_link *); int GetDeltaAckIn(struct ip *, struct alias_link *); int GetDeltaSeqOut(struct ip *, struct alias_link *); void AddSeq(struct ip *, struct alias_link *, int); void SetExpire(struct alias_link *, int); void ClearCheckNewLink(void); void SetLastLineCrlfTermed(struct alias_link *, int); int GetLastLineCrlfTermed(struct alias_link *); void SetDestCallId(struct alias_link *, u_int16_t); #ifndef NO_FW_PUNCH void PunchFWHole(struct alias_link *); #endif /* Housekeeping function */ void HouseKeeping(void); /* Tcp specfic routines */ /*lint -save -library Suppress flexelint warnings */ /* FTP routines */ void AliasHandleFtpOut(struct ip *, struct alias_link *, int); /* IRC routines */ void AliasHandleIrcOut(struct ip *, struct alias_link *, int); /* RTSP routines */ void AliasHandleRtspOut(struct ip *, struct alias_link *, int); /* PPTP routines */ void AliasHandlePptpOut(struct ip *, struct alias_link *); void AliasHandlePptpIn(struct ip *, struct alias_link *); int AliasHandlePptpGreOut(struct ip *); int AliasHandlePptpGreIn(struct ip *); /* NetBIOS routines */ int AliasHandleUdpNbt(struct ip *, struct alias_link *, struct in_addr *, u_short); int AliasHandleUdpNbtNS(struct ip *, struct alias_link *, struct in_addr *, u_short *, struct in_addr *, u_short *); /* CUSeeMe routines */ void AliasHandleCUSeeMeOut(struct ip *, struct alias_link *); void AliasHandleCUSeeMeIn(struct ip *, struct in_addr); /* Transparent proxy routines */ int ProxyCheck(struct ip *, struct in_addr *, u_short *); void ProxyModify(struct alias_link *, struct ip *, int, int); enum alias_tcp_state { ALIAS_TCP_STATE_NOT_CONNECTED, ALIAS_TCP_STATE_CONNECTED, ALIAS_TCP_STATE_DISCONNECTED }; /*lint -restore */ #endif /* !_ALIAS_LOCAL_H_ */