diff options
Diffstat (limited to 'lib/libalias/alias.h')
| -rw-r--r-- | lib/libalias/alias.h | 265 |
1 files changed, 0 insertions, 265 deletions
diff --git a/lib/libalias/alias.h b/lib/libalias/alias.h deleted file mode 100644 index 1deec9f..0000000 --- a/lib/libalias/alias.h +++ /dev/null @@ -1,265 +0,0 @@ -/* lint -save -library Flexelint comment for external headers */ - -/*- - * 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.h defines the outside world interfaces for the packet aliasing - * software. - * - * This software is placed into the public domain with no restrictions on its - * distribution. - */ - -#ifndef _ALIAS_H_ -#define _ALIAS_H_ - -/* - * The external interface to libalias, the packet aliasing engine. - * - * There are two sets of functions: - * - * PacketAlias*() the old API which doesn't take an instance pointer - * and therefore can only have one packet engine at a time. - * - * LibAlias*() the new API which takes as first argument a pointer to - * the instance of the packet aliasing engine. - * - * The functions otherwise correspond to each other one for one, except - * for the LibAliasUnaliasOut()/PacketUnaliasOut() function which were - * were misnamed in the old API. - */ - -/* - * The instance structure - */ -struct libalias; - -/* - * An anonymous structure, a pointer to which is returned from - * PacketAliasRedirectAddr(), PacketAliasRedirectPort() or - * PacketAliasRedirectProto(), passed to PacketAliasAddServer(), - * and freed by PacketAliasRedirectDelete(). - */ -struct alias_link; - - -/* OLD API */ - -/* Initialization and control functions. */ -void PacketAliasInit(void); -void PacketAliasSetAddress(struct in_addr _addr); -void PacketAliasSetFWBase(unsigned int _base, unsigned int _num); -void PacketAliasSetSkinnyPort(unsigned int _port); -unsigned int - PacketAliasSetMode(unsigned int _flags, unsigned int _mask); -void PacketAliasUninit(void); - -/* Packet Handling functions. */ -int PacketAliasIn(char *_ptr, int _maxpacketsize); -int PacketAliasOut(char *_ptr, int _maxpacketsize); -int PacketUnaliasOut(char *_ptr, int _maxpacketsize); - -/* Port and address redirection functions. */ - - -int -PacketAliasAddServer(struct alias_link *_lnk, - struct in_addr _addr, unsigned short _port); -struct alias_link * -PacketAliasRedirectAddr(struct in_addr _src_addr, - struct in_addr _alias_addr); -int PacketAliasRedirectDynamic(struct alias_link *_lnk); -void PacketAliasRedirectDelete(struct alias_link *_lnk); -struct alias_link * -PacketAliasRedirectPort(struct in_addr _src_addr, - unsigned short _src_port, struct in_addr _dst_addr, - unsigned short _dst_port, struct in_addr _alias_addr, - unsigned short _alias_port, unsigned char _proto); -struct alias_link * -PacketAliasRedirectProto(struct in_addr _src_addr, - struct in_addr _dst_addr, struct in_addr _alias_addr, - unsigned char _proto); - -/* Fragment Handling functions. */ -void PacketAliasFragmentIn(char *_ptr, char *_ptr_fragment); -char *PacketAliasGetFragment(char *_ptr); -int PacketAliasSaveFragment(char *_ptr); - -/* Miscellaneous functions. */ -int PacketAliasCheckNewLink(void); -unsigned short - PacketAliasInternetChecksum(unsigned short *_ptr, int _nbytes); -void PacketAliasSetTarget(struct in_addr _target_addr); - -/* Transparent proxying routines. */ -int PacketAliasProxyRule(const char *_cmd); - -/* NEW API */ - -/* Initialization and control functions. */ -struct libalias *LibAliasInit(struct libalias *); -void LibAliasSetAddress(struct libalias *, struct in_addr _addr); -void LibAliasSetFWBase(struct libalias *, unsigned int _base, unsigned int _num); -void LibAliasSetSkinnyPort(struct libalias *, unsigned int _port); -unsigned int - LibAliasSetMode(struct libalias *, unsigned int _flags, unsigned int _mask); -void LibAliasUninit(struct libalias *); - -/* Packet Handling functions. */ -int LibAliasIn (struct libalias *, char *_ptr, int _maxpacketsize); -int LibAliasOut(struct libalias *, char *_ptr, int _maxpacketsize); -int LibAliasOutTry(struct libalias *, char *_ptr, int _maxpacketsize, int _create); -int LibAliasUnaliasOut(struct libalias *, char *_ptr, int _maxpacketsize); - -/* Port and address redirection functions. */ - -int -LibAliasAddServer(struct libalias *, struct alias_link *_lnk, - struct in_addr _addr, unsigned short _port); -struct alias_link * -LibAliasRedirectAddr(struct libalias *, struct in_addr _src_addr, - struct in_addr _alias_addr); -int LibAliasRedirectDynamic(struct libalias *, struct alias_link *_lnk); -void LibAliasRedirectDelete(struct libalias *, struct alias_link *_lnk); -struct alias_link * -LibAliasRedirectPort(struct libalias *, struct in_addr _src_addr, - unsigned short _src_port, struct in_addr _dst_addr, - unsigned short _dst_port, struct in_addr _alias_addr, - unsigned short _alias_port, unsigned char _proto); -struct alias_link * -LibAliasRedirectProto(struct libalias *, struct in_addr _src_addr, - struct in_addr _dst_addr, struct in_addr _alias_addr, - unsigned char _proto); - -/* Fragment Handling functions. */ -void LibAliasFragmentIn(struct libalias *, char *_ptr, char *_ptr_fragment); -char *LibAliasGetFragment(struct libalias *, char *_ptr); -int LibAliasSaveFragment(struct libalias *, char *_ptr); - -/* Miscellaneous functions. */ -int LibAliasCheckNewLink(struct libalias *); -unsigned short - LibAliasInternetChecksum(struct libalias *, unsigned short *_ptr, int _nbytes); -void LibAliasSetTarget(struct libalias *, struct in_addr _target_addr); - -/* Transparent proxying routines. */ -int LibAliasProxyRule(struct libalias *, const char *_cmd); - - -/* - * Mode flags and other constants. - */ - - -/* Mode flags, set using PacketAliasSetMode() */ - -/* - * If PKT_ALIAS_LOG is set, a message will be printed to /var/log/alias.log - * every time a link is created or deleted. This is useful for debugging. - */ -#define PKT_ALIAS_LOG 0x01 - -/* - * If PKT_ALIAS_DENY_INCOMING is set, then incoming connections (e.g. to ftp, - * telnet or web servers will be prevented by the aliasing mechanism. - */ -#define PKT_ALIAS_DENY_INCOMING 0x02 - -/* - * If PKT_ALIAS_SAME_PORTS is set, packets will be attempted sent from the - * same port as they originated on. This allows e.g. rsh to work *99% of the - * time*, but _not_ 100% (it will be slightly flakey instead of not working - * at all). This mode bit is set by PacketAliasInit(), so it is a default - * mode of operation. - */ -#define PKT_ALIAS_SAME_PORTS 0x04 - -/* - * If PKT_ALIAS_USE_SOCKETS is set, then when partially specified links (e.g. - * destination port and/or address is zero), the packet aliasing engine will - * attempt to allocate a socket for the aliasing port it chooses. This will - * avoid interference with the host machine. Fully specified links do not - * require this. This bit is set after a call to PacketAliasInit(), so it is - * a default mode of operation. - */ -#define PKT_ALIAS_USE_SOCKETS 0x08 - -/*- - * If PKT_ALIAS_UNREGISTERED_ONLY is set, then only packets with - * unregistered source addresses will be aliased. Private - * addresses are those in the following ranges: - * - * 10.0.0.0 -> 10.255.255.255 - * 172.16.0.0 -> 172.31.255.255 - * 192.168.0.0 -> 192.168.255.255 - */ -#define PKT_ALIAS_UNREGISTERED_ONLY 0x10 - -/* - * If PKT_ALIAS_RESET_ON_ADDR_CHANGE is set, then the table of dynamic - * aliasing links will be reset whenever PacketAliasSetAddress() changes the - * default aliasing address. If the default aliasing address is left - * unchanged by this function call, then the table of dynamic aliasing links - * will be left intact. This bit is set after a call to PacketAliasInit(). - */ -#define PKT_ALIAS_RESET_ON_ADDR_CHANGE 0x20 - -#ifndef NO_FW_PUNCH -/* - * If PKT_ALIAS_PUNCH_FW is set, active FTP and IRC DCC connections will - * create a 'hole' in the firewall to allow the transfers to work. The - * ipfw rule number that the hole is created with is controlled by - * PacketAliasSetFWBase(). The hole will be attached to that - * particular alias_link, so when the link goes away the hole is deleted. - */ -#define PKT_ALIAS_PUNCH_FW 0x100 -#endif - -/* - * If PKT_ALIAS_PROXY_ONLY is set, then NAT will be disabled and only - * transparent proxying is performed. - */ -#define PKT_ALIAS_PROXY_ONLY 0x40 - -/* - * If PKT_ALIAS_REVERSE is set, the actions of PacketAliasIn() and - * PacketAliasOut() are reversed. - */ -#define PKT_ALIAS_REVERSE 0x80 - -/* Function return codes. */ -#define PKT_ALIAS_ERROR -1 -#define PKT_ALIAS_OK 1 -#define PKT_ALIAS_IGNORED 2 -#define PKT_ALIAS_UNRESOLVED_FRAGMENT 3 -#define PKT_ALIAS_FOUND_HEADER_FRAGMENT 4 - -#endif /* !_ALIAS_H_ */ - -/* lint -restore */ |
