#ifndef ALIAS_LOCAL_H
#define ALIAS_LOCAL_H
#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; \
} \
}
extern int packetAliasMode;
struct alias_link;
u_short IpChecksum(struct ip *);
u_short TcpChecksum(struct ip *);
void DifferentialChecksum(u_short *, u_short *, u_short *, int);
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);
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);
struct in_addr
FindOriginalAddress(struct in_addr);
struct in_addr
FindAliasAddress(struct in_addr);
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 *);
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);
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);
void ClearCheckNewLink(void);
#ifndef NO_FW_PUNCH
void PunchFWHole(struct alias_link *);
#endif
void HouseKeeping(void);
void AliasHandleFtpOut(struct ip *, struct alias_link *, int);
void AliasHandleIrcOut(struct ip *, struct alias_link *, int);
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 *);
void AliasHandleCUSeeMeOut(struct ip *, struct alias_link *);
void AliasHandleCUSeeMeIn(struct ip *, struct in_addr);
int ProxyCheck(struct ip *, struct in_addr *, u_short *);
void ProxyModify(struct alias_link *, struct ip *, int, int);
enum alias_tcp_state {
ALIAS_TCP_STATE_NOT_CONNECTED,
ALIAS_TCP_STATE_CONNECTED,
ALIAS_TCP_STATE_DISCONNECTED
};
int GetPptpAlias (struct in_addr*);
#endif