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Diffstat (limited to 'lib/libalias/alias_local.h')
| -rw-r--r-- | lib/libalias/alias_local.h | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/lib/libalias/alias_local.h b/lib/libalias/alias_local.h new file mode 100644 index 0000000..c25259a --- /dev/null +++ b/lib/libalias/alias_local.h @@ -0,0 +1,229 @@ +/*- + * Copyright (c) 2001 Charles Mott <cm@linktel.net> + * 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. + * + * $FreeBSD$ + */ + +/* + * 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) + * + * <updated several times by original author and Eivind Eklund> + */ + +#ifndef _ALIAS_LOCAL_H_ +#define _ALIAS_LOCAL_H_ + +/* 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; + +/* Prototypes */ + +/* General utilities */ +u_short IpChecksum(struct ip *_pip); +u_short TcpChecksum(struct ip *_pip); +void DifferentialChecksum(u_short *_cksum, u_short *_new, u_short *_old, + int _n); + +/* Internal data access */ +struct alias_link * + FindIcmpIn(struct in_addr _dst_addr, struct in_addr _alias_addr, + u_short _id_alias, int _create); +struct alias_link * + FindIcmpOut(struct in_addr _src_addr, struct in_addr _dst_addr, + u_short _id, int _create); +struct alias_link * + FindFragmentIn1(struct in_addr _dst_addr, struct in_addr _alias_addr, + u_short _ip_id); +struct alias_link * + FindFragmentIn2(struct in_addr _dst_addr, struct in_addr _alias_addr, + u_short _ip_id); +struct alias_link * + AddFragmentPtrLink(struct in_addr _dst_addr, u_short _ip_id); +struct alias_link * + FindFragmentPtr(struct in_addr _dst_addr, u_short _ip_id); +struct alias_link * + FindProtoIn(struct in_addr _dst_addr, struct in_addr _alias_addr, + u_char _proto); +struct alias_link * + FindProtoOut(struct in_addr _src_addr, struct in_addr _dst_addr, + u_char _proto); +struct alias_link * + FindUdpTcpIn(struct in_addr _dst_addr, struct in_addr _alias_addr, + u_short _dst_port, u_short _alias_port, u_char _proto, int _create); +struct alias_link * + FindUdpTcpOut(struct in_addr _src_addr, struct in_addr _dst_addr, + u_short _src_port, u_short _dst_port, u_char _proto, int _create); +struct alias_link * + AddPptp(struct in_addr _src_addr, struct in_addr _dst_addr, + struct in_addr _alias_addr, u_int16_t _src_call_id); +struct alias_link * + FindPptpOutByCallId(struct in_addr _src_addr, + struct in_addr _dst_addr, u_int16_t _src_call_id); +struct alias_link * + FindPptpInByCallId(struct in_addr _dst_addr, + struct in_addr _alias_addr, u_int16_t _dst_call_id); +struct alias_link * + FindPptpOutByPeerCallId(struct in_addr _src_addr, + struct in_addr _dst_addr, u_int16_t _dst_call_id); +struct alias_link * + FindPptpInByPeerCallId(struct in_addr _dst_addr, + struct in_addr _alias_addr, u_int16_t _alias_call_id); +struct alias_link * + FindRtspOut(struct in_addr _src_addr, struct in_addr _dst_addr, + u_short _src_port, u_short _alias_port, u_char _proto); +struct in_addr + FindOriginalAddress(struct in_addr _alias_addr); +struct in_addr + FindAliasAddress(struct in_addr _original_addr); + +/* External data access/modification */ +int FindNewPortGroup(struct in_addr _dst_addr, struct in_addr _alias_addr, + u_short _src_port, u_short _dst_port, u_short _port_count, + u_char _proto, u_char _align); +void GetFragmentAddr(struct alias_link *_link, struct in_addr *_src_addr); +void SetFragmentAddr(struct alias_link *_link, struct in_addr _src_addr); +void GetFragmentPtr(struct alias_link *_link, char **_fptr); +void SetFragmentPtr(struct alias_link *_link, char *fptr); +void SetStateIn(struct alias_link *_link, int _state); +void SetStateOut(struct alias_link *_link, int _state); +int GetStateIn(struct alias_link *_link); +int GetStateOut(struct alias_link *_link); +struct in_addr + GetOriginalAddress(struct alias_link *_link); +struct in_addr + GetDestAddress(struct alias_link *_link); +struct in_addr + GetAliasAddress(struct alias_link *_link); +struct in_addr + GetDefaultAliasAddress(void); +void SetDefaultAliasAddress(struct in_addr _alias_addr); +u_short GetOriginalPort(struct alias_link *_link); +u_short GetAliasPort(struct alias_link *_link); +struct in_addr + GetProxyAddress(struct alias_link *_link); +void SetProxyAddress(struct alias_link *_link, struct in_addr _addr); +u_short GetProxyPort(struct alias_link *_link); +void SetProxyPort(struct alias_link *_link, u_short _port); +void SetAckModified(struct alias_link *_link); +int GetAckModified(struct alias_link *_link); +int GetDeltaAckIn(struct ip *_pip, struct alias_link *_link); +int GetDeltaSeqOut(struct ip *_pip, struct alias_link *_link); +void AddSeq(struct ip *_pip, struct alias_link *_link, int _delta); +void SetExpire(struct alias_link *_link, int _expire); +void ClearCheckNewLink(void); +void SetProtocolFlags(struct alias_link *_link, int _pflags); +int GetProtocolFlags(struct alias_link *_link); +void SetDestCallId(struct alias_link *_link, u_int16_t _cid); +#ifndef NO_FW_PUNCH +void PunchFWHole(struct alias_link *_link); +#endif + +/* Housekeeping function */ +void HouseKeeping(void); + +/* Tcp specfic routines */ +/* lint -save -library Suppress flexelint warnings */ + +/* FTP routines */ +void AliasHandleFtpOut(struct ip *_pip, struct alias_link *_link, + int _maxpacketsize); + +/* IRC routines */ +void AliasHandleIrcOut(struct ip *_pip, struct alias_link *_link, + int _maxsize); + +/* RTSP routines */ +void AliasHandleRtspOut(struct ip *_pip, struct alias_link *_link, + int _maxpacketsize); + +/* PPTP routines */ +void AliasHandlePptpOut(struct ip *_pip, struct alias_link *_link); +void AliasHandlePptpIn(struct ip *_pip, struct alias_link *_link); +int AliasHandlePptpGreOut(struct ip *_pip); +int AliasHandlePptpGreIn(struct ip *_pip); + +/* NetBIOS routines */ +int AliasHandleUdpNbt(struct ip *_pip, struct alias_link *_link, + struct in_addr *_alias_address, u_short _alias_port); +int AliasHandleUdpNbtNS(struct ip *_pip, struct alias_link *_link, + struct in_addr *_alias_address, u_short *_alias_port, + struct in_addr *_original_address, u_short *_original_port); + +/* CUSeeMe routines */ +void AliasHandleCUSeeMeOut(struct ip *_pip, struct alias_link *_link); +void AliasHandleCUSeeMeIn(struct ip *_pip, struct in_addr _original_addr); + +/* Transparent proxy routines */ +int ProxyCheck(struct ip *_pip, struct in_addr *_proxy_server_addr, + u_short *_proxy_server_port); +void ProxyModify(struct alias_link *_link, struct ip *_pip, + int _maxpacketsize, int _proxy_type); + +enum alias_tcp_state { + ALIAS_TCP_STATE_NOT_CONNECTED, + ALIAS_TCP_STATE_CONNECTED, + ALIAS_TCP_STATE_DISCONNECTED +}; + +/*lint -restore */ + +#endif /* !_ALIAS_LOCAL_H_ */ |
