alias_local.h revision 120372
160812Sps/*- 260786Sps * Copyright (c) 2001 Charles Mott <cm@linktel.net> 360786Sps * All rights reserved. 460786Sps * 560786Sps * Redistribution and use in source and binary forms, with or without 660786Sps * modification, are permitted provided that the following conditions 760786Sps * are met: 860786Sps * 1. Redistributions of source code must retain the above copyright 960786Sps * notice, this list of conditions and the following disclaimer. 1060786Sps * 2. Redistributions in binary form must reproduce the above copyright 1160786Sps * notice, this list of conditions and the following disclaimer in the 1260786Sps * documentation and/or other materials provided with the distribution. 1360786Sps * 1460786Sps * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1560786Sps * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1660786Sps * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1760786Sps * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 1860786Sps * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 1960786Sps * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2060786Sps * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2160786Sps * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2260786Sps * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2360786Sps * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2460786Sps * SUCH DAMAGE. 2560786Sps * 2660786Sps * $FreeBSD: head/sys/netinet/libalias/alias_local.h 120372 2003-09-23 07:41:55Z marcus $ 2760786Sps */ 2860786Sps 2960786Sps/* 3060786Sps * Alias_local.h contains the function prototypes for alias.c, 3160786Sps * alias_db.c, alias_util.c and alias_ftp.c, alias_irc.c (as well 3260786Sps * as any future add-ons). It also includes macros, globals and 3360812Sps * struct definitions shared by more than one alias*.c file. 3460786Sps * 3560786Sps * This include file is intended to be used only within the aliasing 3660786Sps * software. Outside world interfaces are defined in alias.h 3760786Sps * 3860786Sps * This software is placed into the public domain with no restrictions 3960786Sps * on its distribution. 4060786Sps * 4160786Sps * Initial version: August, 1996 (cjm) 4260786Sps * 4360786Sps * <updated several times by original author and Eivind Eklund> 4460786Sps */ 4560786Sps 4660786Sps#ifndef _ALIAS_LOCAL_H_ 4760786Sps#define _ALIAS_LOCAL_H_ 4860786Sps 4960786Sps/* Macros */ 5060786Sps 5160786Sps/* 5260786Sps * The following macro is used to update an 5360786Sps * internet checksum. "delta" is a 32-bit 5460786Sps * accumulation of all the changes to the 5560786Sps * checksum (adding in new 16-bit words and 5660786Sps * subtracting out old words), and "cksum" 5760786Sps * is the checksum value to be updated. 5860786Sps */ 5960786Sps#define ADJUST_CHECKSUM(acc, cksum) \ 6060786Sps do { \ 6160786Sps acc += cksum; \ 6260786Sps if (acc < 0) { \ 6360786Sps acc = -acc; \ 6460786Sps acc = (acc >> 16) + (acc & 0xffff); \ 6560812Sps acc += acc >> 16; \ 6660786Sps cksum = (u_short) ~acc; \ 6760786Sps } else { \ 6860786Sps acc = (acc >> 16) + (acc & 0xffff); \ 6960786Sps acc += acc >> 16; \ 7060786Sps cksum = (u_short) acc; \ 7160786Sps } \ 7260786Sps } while (0) 7360786Sps 7460786Sps/* Globals */ 7560786Sps 7660786Spsextern int packetAliasMode; 7760786Spsextern unsigned int skinnyPort; 7860786Sps 7960786Sps/* Prototypes */ 8060786Sps 8160786Sps/* General utilities */ 8260786Spsu_short IpChecksum(struct ip *_pip); 8360786Spsu_short TcpChecksum(struct ip *_pip); 8460786Spsvoid DifferentialChecksum(u_short *_cksum, u_short *_new, u_short *_old, 8560786Sps int _n); 8660786Sps 8760786Sps/* Internal data access */ 8860786Spsstruct alias_link * 8960786Sps FindIcmpIn(struct in_addr _dst_addr, struct in_addr _alias_addr, 9060786Sps u_short _id_alias, int _create); 9160786Spsstruct alias_link * 9260786Sps FindIcmpOut(struct in_addr _src_addr, struct in_addr _dst_addr, 9360786Sps u_short _id, int _create); 9460786Spsstruct alias_link * 9560786Sps FindFragmentIn1(struct in_addr _dst_addr, struct in_addr _alias_addr, 9660786Sps u_short _ip_id); 9760786Spsstruct alias_link * 9860786Sps FindFragmentIn2(struct in_addr _dst_addr, struct in_addr _alias_addr, 9960786Sps u_short _ip_id); 10060786Spsstruct alias_link * 10160786Sps AddFragmentPtrLink(struct in_addr _dst_addr, u_short _ip_id); 10260786Spsstruct alias_link * 10360786Sps FindFragmentPtr(struct in_addr _dst_addr, u_short _ip_id); 10460786Spsstruct alias_link * 10560812Sps FindProtoIn(struct in_addr _dst_addr, struct in_addr _alias_addr, 10660812Sps u_char _proto); 10760812Spsstruct alias_link * 10860786Sps FindProtoOut(struct in_addr _src_addr, struct in_addr _dst_addr, 10960786Sps u_char _proto); 11060786Spsstruct alias_link * 11160786Sps FindUdpTcpIn(struct in_addr _dst_addr, struct in_addr _alias_addr, 11260786Sps u_short _dst_port, u_short _alias_port, u_char _proto, int _create); 11360786Spsstruct alias_link * 11460786Sps FindUdpTcpOut(struct in_addr _src_addr, struct in_addr _dst_addr, 11560812Sps u_short _src_port, u_short _dst_port, u_char _proto, int _create); 11660812Spsstruct alias_link * 11760812Sps AddPptp(struct in_addr _src_addr, struct in_addr _dst_addr, 11860812Sps struct in_addr _alias_addr, u_int16_t _src_call_id); 11960812Spsstruct alias_link * 12060812Sps FindPptpOutByCallId(struct in_addr _src_addr, 12160812Sps struct in_addr _dst_addr, u_int16_t _src_call_id); 12260812Spsstruct alias_link * 12360812Sps FindPptpInByCallId(struct in_addr _dst_addr, 12460812Sps struct in_addr _alias_addr, u_int16_t _dst_call_id); 12560786Spsstruct alias_link * 12660786Sps FindPptpOutByPeerCallId(struct in_addr _src_addr, 12760786Sps struct in_addr _dst_addr, u_int16_t _dst_call_id); 12860786Spsstruct alias_link * 12960786Sps FindPptpInByPeerCallId(struct in_addr _dst_addr, 13060786Sps struct in_addr _alias_addr, u_int16_t _alias_call_id); 13160786Spsstruct alias_link * 13260786Sps FindRtspOut(struct in_addr _src_addr, struct in_addr _dst_addr, 13360786Sps u_short _src_port, u_short _alias_port, u_char _proto); 13460786Spsstruct in_addr 13560786Sps FindOriginalAddress(struct in_addr _alias_addr); 13660786Spsstruct in_addr 13760786Sps FindAliasAddress(struct in_addr _original_addr); 13860786Sps 13960786Sps/* External data access/modification */ 14060786Spsint FindNewPortGroup(struct in_addr _dst_addr, struct in_addr _alias_addr, 14160786Sps u_short _src_port, u_short _dst_port, u_short _port_count, 14260786Sps u_char _proto, u_char _align); 14360786Spsvoid GetFragmentAddr(struct alias_link *_link, struct in_addr *_src_addr); 14460786Spsvoid SetFragmentAddr(struct alias_link *_link, struct in_addr _src_addr); 14560786Spsvoid GetFragmentPtr(struct alias_link *_link, char **_fptr); 14660786Spsvoid SetFragmentPtr(struct alias_link *_link, char *fptr); 14760786Spsvoid SetStateIn(struct alias_link *_link, int _state); 14860786Spsvoid SetStateOut(struct alias_link *_link, int _state); 14960786Spsint GetStateIn(struct alias_link *_link); 15060786Spsint GetStateOut(struct alias_link *_link); 15160786Spsstruct in_addr 15260786Sps GetOriginalAddress(struct alias_link *_link); 15360786Spsstruct in_addr 15460786Sps GetDestAddress(struct alias_link *_link); 15560786Spsstruct in_addr 15660786Sps GetAliasAddress(struct alias_link *_link); 15760786Spsstruct in_addr 15860786Sps GetDefaultAliasAddress(void); 15960786Spsvoid SetDefaultAliasAddress(struct in_addr _alias_addr); 16060786Spsu_short GetOriginalPort(struct alias_link *_link); 16160786Spsu_short GetAliasPort(struct alias_link *_link); 16260786Spsstruct in_addr 16360786Sps GetProxyAddress(struct alias_link *_link); 16460786Spsvoid SetProxyAddress(struct alias_link *_link, struct in_addr _addr); 16560786Spsu_short GetProxyPort(struct alias_link *_link); 16660786Spsvoid SetProxyPort(struct alias_link *_link, u_short _port); 16760786Spsvoid SetAckModified(struct alias_link *_link); 16860786Spsint GetAckModified(struct alias_link *_link); 16960786Spsint GetDeltaAckIn(struct ip *_pip, struct alias_link *_link); 17060786Spsint GetDeltaSeqOut(struct ip *_pip, struct alias_link *_link); 17160786Spsvoid AddSeq(struct ip *_pip, struct alias_link *_link, int _delta); 17260786Spsvoid SetExpire(struct alias_link *_link, int _expire); 17360786Spsvoid ClearCheckNewLink(void); 17460786Spsvoid SetProtocolFlags(struct alias_link *_link, int _pflags); 17560786Spsint GetProtocolFlags(struct alias_link *_link); 17660786Spsvoid SetDestCallId(struct alias_link *_link, u_int16_t _cid); 17760786Sps#ifndef NO_FW_PUNCH 17860786Spsvoid PunchFWHole(struct alias_link *_link); 17960786Sps#endif 18060786Sps 18160786Sps/* Housekeeping function */ 18260786Spsvoid HouseKeeping(void); 18360786Sps 18460786Sps/* Tcp specfic routines */ 18560786Sps/* lint -save -library Suppress flexelint warnings */ 18660786Sps 18760786Sps/* FTP routines */ 18860786Spsvoid AliasHandleFtpOut(struct ip *_pip, struct alias_link *_link, 18960786Sps int _maxpacketsize); 19060786Sps 19160786Sps/* IRC routines */ 19260786Spsvoid AliasHandleIrcOut(struct ip *_pip, struct alias_link *_link, 19360786Sps int _maxsize); 19460786Sps 19560786Sps/* RTSP routines */ 19660786Spsvoid AliasHandleRtspOut(struct ip *_pip, struct alias_link *_link, 19760786Sps int _maxpacketsize); 19860786Sps 19960786Sps/* PPTP routines */ 20060786Spsvoid AliasHandlePptpOut(struct ip *_pip, struct alias_link *_link); 20160786Spsvoid AliasHandlePptpIn(struct ip *_pip, struct alias_link *_link); 20260786Spsint AliasHandlePptpGreOut(struct ip *_pip); 20360786Spsint AliasHandlePptpGreIn(struct ip *_pip); 20460786Sps 20560786Sps/* NetBIOS routines */ 20660786Spsint AliasHandleUdpNbt(struct ip *_pip, struct alias_link *_link, 20760786Sps struct in_addr *_alias_address, u_short _alias_port); 20860786Spsint AliasHandleUdpNbtNS(struct ip *_pip, struct alias_link *_link, 20960786Sps struct in_addr *_alias_address, u_short *_alias_port, 21060786Sps struct in_addr *_original_address, u_short *_original_port); 21160786Sps 21260786Sps/* CUSeeMe routines */ 21360786Spsvoid AliasHandleCUSeeMeOut(struct ip *_pip, struct alias_link *_link); 21460786Spsvoid AliasHandleCUSeeMeIn(struct ip *_pip, struct in_addr _original_addr); 21560812Sps 21660786Sps/* Skinny routines */ 21760786Spsvoid AliasHandleSkinny(struct ip *_pip, struct alias_link *_link); 21860786Sps 21960786Sps/* Transparent proxy routines */ 22060786Spsint ProxyCheck(struct ip *_pip, struct in_addr *_proxy_server_addr, 22160786Sps u_short *_proxy_server_port); 22260786Spsvoid ProxyModify(struct alias_link *_link, struct ip *_pip, 22360786Sps int _maxpacketsize, int _proxy_type); 22460786Sps 22560786Spsenum alias_tcp_state { 22660786Sps ALIAS_TCP_STATE_NOT_CONNECTED, 22760786Sps ALIAS_TCP_STATE_CONNECTED, 22860786Sps ALIAS_TCP_STATE_DISCONNECTED 22960786Sps}; 23060786Sps 23160786Sps/*lint -restore */ 23260786Sps 23360786Sps#endif /* !_ALIAS_LOCAL_H_ */ 23460786Sps