diff options
Diffstat (limited to 'sys/netinet/libalias/alias.h')
| -rw-r--r-- | sys/netinet/libalias/alias.h | 113 |
1 files changed, 79 insertions, 34 deletions
diff --git a/sys/netinet/libalias/alias.h b/sys/netinet/libalias/alias.h index 0063802..f574017 100644 --- a/sys/netinet/libalias/alias.h +++ b/sys/netinet/libalias/alias.h @@ -12,45 +12,82 @@ #ifndef _ALIAS_H_ #define _ALIAS_H_ -/* Alias link representativei (incomplete struct) */ +#ifndef NULL +#define NULL 0 +#endif + +/* Alias link representative (incomplete struct) */ struct alias_link; /* External interfaces (API) to packet aliasing engine */ + +/* Initialization and Control */ + extern void + PacketAliasInit(void); + + extern void + PacketAliasSetAddress(struct in_addr); + + extern unsigned int + PacketAliasSetMode(unsigned int, unsigned int); + +/* Packet Handling */ + extern int + PacketAliasIn(char *, int maxpacketsize); + + extern int + PacketAliasOut(char *, int maxpacketsize); + +/* Port and Address Redirection */ + extern struct alias_link * + PacketAliasRedirectPort(struct in_addr, u_short, + struct in_addr, u_short, + struct in_addr, u_short, + u_char); + + extern struct alias_link * + PacketAliasRedirectAddr(struct in_addr, + struct in_addr); + + extern void + PacketAliasRedirectDelete(struct alias_link *); + +/* Fragment Handling */ + extern int + PacketAliasSaveFragment(char *); + + extern char * + PacketAliasGetFragment(char *); + + extern void + PacketAliasFragmentIn(char *, char *); + +/* Miscellaneous Functions */ + extern u_short + PacketAliasInternetChecksum(u_short *, int); + + +/* + In version 2.2, the function names were rationalized + to all be of the form PacketAlias... These are the + old function names for backwards compatibility +*/ extern int SaveFragmentPtr(char *); extern char *GetNextFragmentPtr(char *); extern void FragmentAliasIn(char *, char *); -extern int PacketAliasIn(char *, int maxpacketsize); -extern int PacketAliasOut(char *, int maxpacketsize); -extern int PacketAliasIn2(char *, struct in_addr, int maxpacketsize); -extern int PacketAliasOut2(char *, struct in_addr, int maxpacketsize); extern void SetPacketAliasAddress(struct in_addr); extern void InitPacketAlias(void); -extern void InitPacketAliasLog(void); -extern void UninitPacketAliasLog(void); extern unsigned int SetPacketAliasMode(unsigned int, unsigned int); -extern struct alias_link * -PacketAliasRedirectPort(struct in_addr, u_short, - struct in_addr, u_short, - struct in_addr, u_short, - u_char); +extern int PacketAliasIn2(char *, struct in_addr, int maxpacketsize); +extern int PacketAliasOut2(char *, struct in_addr, int maxpacketsize); extern int PacketAliasPermanentLink(struct in_addr, u_short, struct in_addr, u_short, u_short, u_char); -extern struct alias_link * -PacketAliasRedirectAddr(struct in_addr, - struct in_addr); -void PacketAliasRedirectDelete(struct alias_link *); - - -/* InternetChecksum() is not specifically part of the - packet aliasing API, but is sometimes needed outside - the module. (~for instance, natd uses it to create - an ICMP error message when interface size is - exceeded.) */ - extern u_short InternetChecksum(u_short *, int); +/* Obsolete constant */ +#define PKT_ALIAS_NEW_LINK 5 /********************** Mode flags ********************/ /* Set these flags using SetPacketAliasMode() */ @@ -58,25 +95,28 @@ extern u_short InternetChecksum(u_short *, int); /* 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 1 +#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 2 +#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 allow eg rsh to work + the same port as they originated on. This allows eg rsh to work *99% of the time*, but _not_ 100%. (It will be slightly flakey - instead of not working at all.) */ -#define PKT_ALIAS_SAME_PORTS 4 + 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. */ -#define PKT_ALIAS_USE_SOCKETS 8 + 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 with unregistered source addresses will be aliased (along with those @@ -86,9 +126,15 @@ extern u_short InternetChecksum(u_short *, int); 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 16 - +#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 functions 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 /* Return Codes */ #define PKT_ALIAS_ERROR -1 @@ -96,7 +142,6 @@ extern u_short InternetChecksum(u_short *, int); #define PKT_ALIAS_IGNORED 2 #define PKT_ALIAS_UNRESOLVED_FRAGMENT 3 #define PKT_ALIAS_FOUND_HEADER_FRAGMENT 4 -#define PKT_ALIAS_NEW_LINK 5 #endif /*lint -restore */ |
