diff options
Diffstat (limited to 'lib/libalias/alias.h')
| -rw-r--r-- | lib/libalias/alias.h | 94 |
1 files changed, 86 insertions, 8 deletions
diff --git a/lib/libalias/alias.h b/lib/libalias/alias.h index b0c75c9..d714126 100644 --- a/lib/libalias/alias.h +++ b/lib/libalias/alias.h @@ -39,7 +39,37 @@ #ifndef _ALIAS_H_ #define _ALIAS_H_ -/* The external interface to libalias, the packet aliasing engine. */ +/* + * 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); @@ -57,13 +87,6 @@ int PacketUnaliasOut(char *_ptr, int _maxpacketsize); /* Port and address redirection functions. */ -/* - * An anonymous structure, a pointer to which is returned from - * PacketAliasRedirectAddr(), PacketAliasRedirectPort() or - * PacketAliasRedirectProto(), passed to PacketAliasAddServer(), - * and freed by PacketAliasRedirectDelete(). - */ -struct alias_link; int PacketAliasAddServer(struct alias_link *_link, struct in_addr _addr, unsigned short _port); @@ -96,6 +119,61 @@ 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 LibAliasUnaliasOut(struct libalias *, char *_ptr, int _maxpacketsize); + +/* Port and address redirection functions. */ + +int LibAliasAddServer(struct libalias *, struct alias_link *_link, + 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 *_link); +void LibAliasRedirectDelete(struct libalias *, struct alias_link *_link); +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() */ /* |
