static int
ProtoAliasIn(struct libalias *la, struct in_addr ip_src,
struct in_addr *ip_dst, u_char ip_p, u_short *ip_sum)
{
/*
Handle incoming IP packets. The
only thing which is done in this case is to alias
the dest IP address of the packet to our inside
machine.
*/
struct alias_link *lnk;
LIBALIAS_LOCK_ASSERT(la);
/* Return if proxy-only mode is enabled */
if (la->packetAliasMode & PKT_ALIAS_PROXY_ONLY)
return (PKT_ALIAS_OK);
lnk = FindProtoIn(la, ip_src, *ip_dst, ip_p);
if (lnk != NULL) {
struct in_addr original_address;
original_address = GetOriginalAddress(lnk);
/* Restore original IP address */
DifferentialChecksum(ip_sum,
&original_address, ip_dst, 2);
*ip_dst = original_address;
return (PKT_ALIAS_OK);
}
return (PKT_ALIAS_IGNORED);
}
static int
ProtoAliasIn(struct ip *pip)
{
/*
Handle incoming IP packets. The
only thing which is done in this case is to alias
the dest IP address of the packet to our inside
machine.
*/
struct alias_link *link;
/* Return if proxy-only mode is enabled */
if (packetAliasMode & PKT_ALIAS_PROXY_ONLY)
return PKT_ALIAS_OK;
link = FindProtoIn(pip->ip_src, pip->ip_dst, pip->ip_p);
if (link != NULL)
{
struct in_addr original_address;
original_address = GetOriginalAddress(link);
/* Restore original IP address */
DifferentialChecksum(&pip->ip_sum,
(u_short *) &original_address,
(u_short *) &pip->ip_dst,
2);
pip->ip_dst = original_address;
return(PKT_ALIAS_OK);
}
return(PKT_ALIAS_IGNORED);
}
