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freebsd/lib/libalias/alias_local.h

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Create the alias library. This is currently only used by ppp (or will be shortly). Natd can now be updated to use this library rather than carrying its own version of the code. Submitted by: Charles Mott <cmott@srv.net>
1997-05-23 04:41:31 +00:00
/* -*- mode: c; tab-width: 3; c-basic-offset: 3; -*-
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
Version 3.0: January 1, 1999 - Transparent proxying support added. - PPTP redirecting support added based on patches contributed by Dru Nelson <dnelson@redwoodsoft.com>. Submitted by: Charles Mott <cmott@srv.net>
1999-02-27 02:16:01 +00:00
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
Create the alias library. This is currently only used by ppp (or will be shortly). Natd can now be updated to use this library rather than carrying its own version of the code. Submitted by: Charles Mott <cmott@srv.net>
1997-05-23 04:41:31 +00:00
This software is placed into the public domain with no restrictions
on its distribution.
Initial version: August, 1996 (cjm)
Add $FreeBSD$ and spell Eklund properly. Approved by: brian (well, he approved adding $Id$)
1999-08-29 23:17:04 +00:00
<updated several times by original author and Eivind Eklund>
$FreeBSD$
Create the alias library. This is currently only used by ppp (or will be shortly). Natd can now be updated to use this library rather than carrying its own version of the code. Submitted by: Charles Mott <cmott@srv.net>
1997-05-23 04:41:31 +00:00
*/
Teach libalias to work with IPFW firewalls (controlled by a flag). Obtained from: Yes development tree (+ 10 lines of patches from Charles Mott, original libalias author)
1998-01-09 21:13:35 +00:00
#ifndef ALIAS_LOCAL_H
#define ALIAS_LOCAL_H
Create the alias library. This is currently only used by ppp (or will be shortly). Natd can now be updated to use this library rather than carrying its own version of the code. Submitted by: Charles Mott <cmott@srv.net>
1997-05-23 04:41:31 +00:00
- Moved NULL definition into private include file. - Minor spelling fixes.
2000-04-05 14:23:42 +00:00
#ifndef NULL
#define NULL 0
#endif
Version 3.0: January 1, 1999 - Transparent proxying support added. - PPTP redirecting support added based on patches contributed by Dru Nelson <dnelson@redwoodsoft.com>. Submitted by: Charles Mott <cmott@srv.net>
1999-02-27 02:16:01 +00:00
/*
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) { \
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; \
} \
}
/*
Globals
*/
Create the alias library. This is currently only used by ppp (or will be shortly). Natd can now be updated to use this library rather than carrying its own version of the code. Submitted by: Charles Mott <cmott@srv.net>
1997-05-23 04:41:31 +00:00
extern int packetAliasMode;
Version 3.0: January 1, 1999 - Transparent proxying support added. - PPTP redirecting support added based on patches contributed by Dru Nelson <dnelson@redwoodsoft.com>. Submitted by: Charles Mott <cmott@srv.net>
1999-02-27 02:16:01 +00:00
/*
Structs
*/
struct alias_link; /* Incomplete structure */
/*
Prototypes
*/
Create the alias library. This is currently only used by ppp (or will be shortly). Natd can now be updated to use this library rather than carrying its own version of the code. Submitted by: Charles Mott <cmott@srv.net>
1997-05-23 04:41:31 +00:00
/* 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);
struct alias_link *
FindIcmpOut(struct in_addr, struct in_addr, u_short);
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);
Add support for multiple PPTP sessions: - new API function: PacketAliasRedirectPptp() - new mode bit: PKT_ALIAS_DENY_PPTP Please see manual page for details.
2000-04-18 10:18:21 +00:00
struct alias_link *
Replace PacketAliasRedirectPptp() (which had nothing specific to PPTP) with more generic PacketAliasRedirectProto(). Major number is not bumped because it is believed that noone has started using PacketAliasRedirectPptp() yet.
2000-04-28 13:44:49 +00:00
FindProtoIn(struct in_addr, struct in_addr, u_char);
Add support for multiple PPTP sessions: - new API function: PacketAliasRedirectPptp() - new mode bit: PKT_ALIAS_DENY_PPTP Please see manual page for details.
2000-04-18 10:18:21 +00:00
struct alias_link *
Replace PacketAliasRedirectPptp() (which had nothing specific to PPTP) with more generic PacketAliasRedirectProto(). Major number is not bumped because it is believed that noone has started using PacketAliasRedirectPptp() yet.
2000-04-28 13:44:49 +00:00
FindProtoOut(struct in_addr, struct in_addr, u_char);
Add support for multiple PPTP sessions: - new API function: PacketAliasRedirectPptp() - new mode bit: PKT_ALIAS_DENY_PPTP Please see manual page for details.
2000-04-18 10:18:21 +00:00
Create the alias library. This is currently only used by ppp (or will be shortly). Natd can now be updated to use this library rather than carrying its own version of the code. Submitted by: Charles Mott <cmott@srv.net>
1997-05-23 04:41:31 +00:00
struct alias_link *
FindUdpTcpIn (struct in_addr, struct in_addr, u_short, u_short, u_char);
struct alias_link *
FindUdpTcpOut(struct in_addr, struct in_addr, u_short, u_short, u_char);
Added true support for PPTP aliasing. Some nice features include: - Multiple PPTP clients behind NAT to the same or different servers. - Single PPTP server behind NAT -- you just need to redirect TCP port 1723 to a local machine. Multiple servers behind NAT is possible but would require a simple API change. - No API changes! For more information on how this works see comments at the start of the alias_pptp.c. PacketAliasPptp() is no longer necessary and will be removed soon. Submitted by: Erik Salander <erik@whistle.com> Reviewed by: ru Rewritten by: ru Reviewed by: Erik Salander <erik@whistle.com>
2000-06-20 11:41:48 +00:00
struct alias_link *
A significant rewrite of PPTP aliasing code. PPTP links are no longer dropped by simple (and inappropriate in this case) "inactivity timeout" procedure, only when requested through the control connection. It is now possible to have multiple PPTP servers running behind NAT. Just redirect the incoming TCP traffic to port 1723, everything else is done transparently. Problems were reported and the fix was tested by: Michael Adler <Michael.Adler@compaq.com>, David Andersen <dga@lcs.mit.edu>
2000-10-30 12:39:41 +00:00
AddPptp(struct in_addr, struct in_addr, struct in_addr, u_int16_t);
Added true support for PPTP aliasing. Some nice features include: - Multiple PPTP clients behind NAT to the same or different servers. - Single PPTP server behind NAT -- you just need to redirect TCP port 1723 to a local machine. Multiple servers behind NAT is possible but would require a simple API change. - No API changes! For more information on how this works see comments at the start of the alias_pptp.c. PacketAliasPptp() is no longer necessary and will be removed soon. Submitted by: Erik Salander <erik@whistle.com> Reviewed by: ru Rewritten by: ru Reviewed by: Erik Salander <erik@whistle.com>
2000-06-20 11:41:48 +00:00
struct alias_link *
A significant rewrite of PPTP aliasing code. PPTP links are no longer dropped by simple (and inappropriate in this case) "inactivity timeout" procedure, only when requested through the control connection. It is now possible to have multiple PPTP servers running behind NAT. Just redirect the incoming TCP traffic to port 1723, everything else is done transparently. Problems were reported and the fix was tested by: Michael Adler <Michael.Adler@compaq.com>, David Andersen <dga@lcs.mit.edu>
2000-10-30 12:39:41 +00:00
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);
Added true support for PPTP aliasing. Some nice features include: - Multiple PPTP clients behind NAT to the same or different servers. - Single PPTP server behind NAT -- you just need to redirect TCP port 1723 to a local machine. Multiple servers behind NAT is possible but would require a simple API change. - No API changes! For more information on how this works see comments at the start of the alias_pptp.c. PacketAliasPptp() is no longer necessary and will be removed soon. Submitted by: Erik Salander <erik@whistle.com> Reviewed by: ru Rewritten by: ru Reviewed by: Erik Salander <erik@whistle.com>
2000-06-20 11:41:48 +00:00
Add address translation support for RTSP/RTP used by RealPlayer and Quicktime streaming media applications. Add a BUGS section to the man page. Submitted by: Erik Salander <erik@whistle.com>
2000-07-26 23:15:46 +00:00
struct alias_link *
QueryUdpTcpIn (struct in_addr, struct in_addr, u_short, u_short, u_char);
struct alias_link *
QueryUdpTcpOut(struct in_addr, struct in_addr, u_short, u_short, u_char);
struct alias_link *
FindRtspOut(struct in_addr, struct in_addr, u_short, u_short, u_char);
Create the alias library. This is currently only used by ppp (or will be shortly). Natd can now be updated to use this library rather than carrying its own version of the code. Submitted by: Charles Mott <cmott@srv.net>
1997-05-23 04:41:31 +00:00
struct in_addr
FindOriginalAddress(struct in_addr);
struct in_addr
FindAliasAddress(struct in_addr);
/* External data access/modification */
Add address translation support for RTSP/RTP used by RealPlayer and Quicktime streaming media applications. Add a BUGS section to the man page. Submitted by: Erik Salander <erik@whistle.com>
2000-07-26 23:15:46 +00:00
int FindNewPortGroup(struct in_addr, struct in_addr,
u_short, u_short, u_short, u_char, u_char);
Create the alias library. This is currently only used by ppp (or will be shortly). Natd can now be updated to use this library rather than carrying its own version of the code. Submitted by: Charles Mott <cmott@srv.net>
1997-05-23 04:41:31 +00:00
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 *);
Version 3.0: January 1, 1999 - Transparent proxying support added. - PPTP redirecting support added based on patches contributed by Dru Nelson <dnelson@redwoodsoft.com>. Submitted by: Charles Mott <cmott@srv.net>
1999-02-27 02:16:01 +00:00
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);
Create the alias library. This is currently only used by ppp (or will be shortly). Natd can now be updated to use this library rather than carrying its own version of the code. Submitted by: Charles Mott <cmott@srv.net>
1997-05-23 04:41:31 +00:00
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);
Update to version 2.2. Only the PacketAlias*() functions should now be used. The old 2.1 stuff is there for backwards compatability. Submitted by: Charles Mott <cmott@snake.srv.net>
1997-08-03 18:20:03 +00:00
void ClearCheckNewLink(void);
- Added support for passive mode FTP by aliasing 227 replies. It does mean that it is now possible to run passive-mode FTP server behind NAT. - SECURITY: FTP aliasing engine now ensures that: o the segment preceding a PORT/227 segment terminates with a \r\n; o the IP address in the PORT/227 matches the source IP address of the packet; o the port number in the PORT command or 277 reply is greater than or equal to 1024. Submitted by: Erik Salander <erik@whistle.com> Reviewed by: ru
2000-06-14 16:09:35 +00:00
void SetLastLineCrlfTermed(struct alias_link *, int);
int GetLastLineCrlfTermed(struct alias_link *);
A significant rewrite of PPTP aliasing code. PPTP links are no longer dropped by simple (and inappropriate in this case) "inactivity timeout" procedure, only when requested through the control connection. It is now possible to have multiple PPTP servers running behind NAT. Just redirect the incoming TCP traffic to port 1723, everything else is done transparently. Problems were reported and the fix was tested by: Michael Adler <Michael.Adler@compaq.com>, David Andersen <dga@lcs.mit.edu>
2000-10-30 12:39:41 +00:00
void SetDestCallId(struct alias_link *, u_int16_t);
Don't call PunchFWHole() ifdef NO_FW_PUNCH Pointed out by: "Steve Sims" <SimsS@IBM.Net>
1998-06-06 21:52:37 +00:00
#ifndef NO_FW_PUNCH
Teach libalias to work with IPFW firewalls (controlled by a flag). Obtained from: Yes development tree (+ 10 lines of patches from Charles Mott, original libalias author)
1998-01-09 21:13:35 +00:00
void PunchFWHole(struct alias_link *);
Don't call PunchFWHole() ifdef NO_FW_PUNCH Pointed out by: "Steve Sims" <SimsS@IBM.Net>
1998-06-06 21:52:37 +00:00
#endif
Teach libalias to work with IPFW firewalls (controlled by a flag). Obtained from: Yes development tree (+ 10 lines of patches from Charles Mott, original libalias author)
1998-01-09 21:13:35 +00:00
Create the alias library. This is currently only used by ppp (or will be shortly). Natd can now be updated to use this library rather than carrying its own version of the code. Submitted by: Charles Mott <cmott@srv.net>
1997-05-23 04:41:31 +00:00
/* Housekeeping function */
void HouseKeeping(void);
/* Tcp specfic routines */
/*lint -save -library Suppress flexelint warnings */
Version 3.0: January 1, 1999 - Transparent proxying support added. - PPTP redirecting support added based on patches contributed by Dru Nelson <dnelson@redwoodsoft.com>. Submitted by: Charles Mott <cmott@srv.net>
1999-02-27 02:16:01 +00:00
/* FTP routines */
Create the alias library. This is currently only used by ppp (or will be shortly). Natd can now be updated to use this library rather than carrying its own version of the code. Submitted by: Charles Mott <cmott@srv.net>
1997-05-23 04:41:31 +00:00
void AliasHandleFtpOut(struct ip *, struct alias_link *, int);
Version 3.0: January 1, 1999 - Transparent proxying support added. - PPTP redirecting support added based on patches contributed by Dru Nelson <dnelson@redwoodsoft.com>. Submitted by: Charles Mott <cmott@srv.net>
1999-02-27 02:16:01 +00:00
/* IRC routines */
Add a ``const'' and remove some inconsistent prototype args.
1999-03-24 20:28:58 +00:00
void AliasHandleIrcOut(struct ip *, struct alias_link *, int);
Version 3.0: January 1, 1999 - Transparent proxying support added. - PPTP redirecting support added based on patches contributed by Dru Nelson <dnelson@redwoodsoft.com>. Submitted by: Charles Mott <cmott@srv.net>
1999-02-27 02:16:01 +00:00
Add address translation support for RTSP/RTP used by RealPlayer and Quicktime streaming media applications. Add a BUGS section to the man page. Submitted by: Erik Salander <erik@whistle.com>
2000-07-26 23:15:46 +00:00
/* RTSP routines */
void AliasHandleRtspOut(struct ip *, struct alias_link *, int);
Added true support for PPTP aliasing. Some nice features include: - Multiple PPTP clients behind NAT to the same or different servers. - Single PPTP server behind NAT -- you just need to redirect TCP port 1723 to a local machine. Multiple servers behind NAT is possible but would require a simple API change. - No API changes! For more information on how this works see comments at the start of the alias_pptp.c. PacketAliasPptp() is no longer necessary and will be removed soon. Submitted by: Erik Salander <erik@whistle.com> Reviewed by: ru Rewritten by: ru Reviewed by: Erik Salander <erik@whistle.com>
2000-06-20 11:41:48 +00:00
/* PPTP routines */
void AliasHandlePptpOut(struct ip *, struct alias_link *);
void AliasHandlePptpIn(struct ip *, struct alias_link *);
A significant rewrite of PPTP aliasing code. PPTP links are no longer dropped by simple (and inappropriate in this case) "inactivity timeout" procedure, only when requested through the control connection. It is now possible to have multiple PPTP servers running behind NAT. Just redirect the incoming TCP traffic to port 1723, everything else is done transparently. Problems were reported and the fix was tested by: Michael Adler <Michael.Adler@compaq.com>, David Andersen <dga@lcs.mit.edu>
2000-10-30 12:39:41 +00:00
int AliasHandlePptpGreOut(struct ip *);
int AliasHandlePptpGreIn(struct ip *);
Added true support for PPTP aliasing. Some nice features include: - Multiple PPTP clients behind NAT to the same or different servers. - Single PPTP server behind NAT -- you just need to redirect TCP port 1723 to a local machine. Multiple servers behind NAT is possible but would require a simple API change. - No API changes! For more information on how this works see comments at the start of the alias_pptp.c. PacketAliasPptp() is no longer necessary and will be removed soon. Submitted by: Erik Salander <erik@whistle.com> Reviewed by: ru Rewritten by: ru Reviewed by: Erik Salander <erik@whistle.com>
2000-06-20 11:41:48 +00:00
Version 3.0: January 1, 1999 - Transparent proxying support added. - PPTP redirecting support added based on patches contributed by Dru Nelson <dnelson@redwoodsoft.com>. Submitted by: Charles Mott <cmott@srv.net>
1999-02-27 02:16:01 +00:00
/* NetBIOS routines */
Reviewed by: freebsd-current Add bounds checking to netbios NS packet resolving code. This should prevent natd from crashing on badly formed netbios packets (as might be heard when the machine is sitting on a cable modem or certain DSL networks), and also closes potential security holes that might have exploited the lack of bounds checking in the previous version of the code.
1998-12-14 02:25:32 +00:00
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 *);
Version 3.0: January 1, 1999 - Transparent proxying support added. - PPTP redirecting support added based on patches contributed by Dru Nelson <dnelson@redwoodsoft.com>. Submitted by: Charles Mott <cmott@srv.net>
1999-02-27 02:16:01 +00:00
/* CUSeeMe routines */
Add CUSEEME support. This has *not* been tested, nor could I find anyone to test it, so please report any problems to me.
1998-06-24 06:58:00 +00:00
void AliasHandleCUSeeMeOut(struct ip *, struct alias_link *);
void AliasHandleCUSeeMeIn(struct ip *, struct in_addr);
Primary verison of NetBIOS over TCP/IP. Now you can connect Windows DOMAIN as DOMAIN user through NAT function. See also RFC1002 for futher detail of SMB structure. Submitted by: Atsushi Murai <amurai@spec.co.jp>
1998-05-24 03:03:10 +00:00
Version 3.0: January 1, 1999 - Transparent proxying support added. - PPTP redirecting support added based on patches contributed by Dru Nelson <dnelson@redwoodsoft.com>. Submitted by: Charles Mott <cmott@srv.net>
1999-02-27 02:16:01 +00:00
/* Transparent proxy routines */
int ProxyCheck(struct ip *, struct in_addr *, u_short *);
void ProxyModify(struct alias_link *, struct ip *, int, int);
Primary verison of NetBIOS over TCP/IP. Now you can connect Windows DOMAIN as DOMAIN user through NAT function. See also RFC1002 for futher detail of SMB structure. Submitted by: Atsushi Murai <amurai@spec.co.jp>
1998-05-24 03:03:10 +00:00
Update to version 2.2. Only the PacketAlias*() functions should now be used. The old 2.1 stuff is there for backwards compatability. Submitted by: Charles Mott <cmott@snake.srv.net>
1997-08-03 18:20:03 +00:00
Teach libalias to work with IPFW firewalls (controlled by a flag). Obtained from: Yes development tree (+ 10 lines of patches from Charles Mott, original libalias author)
1998-01-09 21:13:35 +00:00
enum alias_tcp_state {
ALIAS_TCP_STATE_NOT_CONNECTED,
ALIAS_TCP_STATE_CONNECTED,
ALIAS_TCP_STATE_DISCONNECTED
};
Create the alias library. This is currently only used by ppp (or will be shortly). Natd can now be updated to use this library rather than carrying its own version of the code. Submitted by: Charles Mott <cmott@srv.net>
1997-05-23 04:41:31 +00:00
/*lint -restore */
Teach libalias to work with IPFW firewalls (controlled by a flag). Obtained from: Yes development tree (+ 10 lines of patches from Charles Mott, original libalias author)
1998-01-09 21:13:35 +00:00
#endif /* defined(ALIAS_LOCAL_H) */
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