static int
ProtoAliasOut(struct libalias *la, struct in_addr *ip_src,
struct in_addr ip_dst, u_char ip_p, u_short *ip_sum, int create)
{
/*
Handle outgoing IP packets. The
only thing which is done in this case is to alias
the source IP address of the packet.
*/
struct alias_link *lnk;
LIBALIAS_LOCK_ASSERT(la);
(void)create;
/* Return if proxy-only mode is enabled */
if (la->packetAliasMode & PKT_ALIAS_PROXY_ONLY)
return (PKT_ALIAS_OK);
lnk = FindProtoOut(la, *ip_src, ip_dst, ip_p);
if (lnk != NULL) {
struct in_addr alias_address;
alias_address = GetAliasAddress(lnk);
/* Change source address */
DifferentialChecksum(ip_sum,
&alias_address, ip_src, 2);
*ip_src = alias_address;
return (PKT_ALIAS_OK);
}
return (PKT_ALIAS_IGNORED);
}
static int
ProtoAliasOut(struct ip *pip)
{
/*
Handle outgoing IP packets. The
only thing which is done in this case is to alias
the source IP address of the packet.
*/
struct alias_link *link;
/* Return if proxy-only mode is enabled */
if (packetAliasMode & PKT_ALIAS_PROXY_ONLY)
return PKT_ALIAS_OK;
link = FindProtoOut(pip->ip_src, pip->ip_dst, pip->ip_p);
if (link != NULL)
{
struct in_addr alias_address;
alias_address = GetAliasAddress(link);
/* Change source address */
DifferentialChecksum(&pip->ip_sum,
(u_short *) &alias_address,
(u_short *) &pip->ip_src,
2);
pip->ip_src = alias_address;
return(PKT_ALIAS_OK);
}
return(PKT_ALIAS_IGNORED);
}
