so_original_dst problem for orginal destination ip

[zxiion86]

hello im making a transparent proxy like program..i have my linksys wrt54gs running dd-wrt as the iptables server with the following ip tables command on it

iptables -t nat -A PREROUTING -i br0 -s ! 10.10.10.106 -p tcp --dport 80 -j DNAT --to 10.10.10.106:2000

and i have an ubuntu box connected via hardwire so my configuration looks like this

internet via wireless cause im using it as a repeater
|
|
wireless | hardwire
laptop ----------> router dd-wrt ----------> ubuntu proxy

the iptables rule is working and redirecting the traffic to my proxy program and i get the connection except that getsockopt(so_original_dst) is returning the incorrect ip address its returning the ip aaddress of the laptop instead of the ip address that im originally trying to connect to
so when i connect to www.google.com 80 i should get the ip adress of google.com returned but i dont

here is the source code

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <errno.h>
#include <dlfcn.h>
#include <linux/netfilter_ipv4.h>

#define SD_BOTH 2
#define SOCKET int
#define INVALID_SOCKET (SOCKET)(~0)
#define SOCKET_ERROR (-1)

int main(void)
{
SOCKET listen_sock, new_sock;
struct sockaddr_in client;
struct sockaddr_in me;
struct sockaddr_in peer;

unsigned long sockmode = 0;
socklen_t SLen = sizeof(client);

if ((listen_sock = socket(AF_INET, SOCK_STREAM, 0))==
INVALID_SOCKET) {
exit(1);
}

/* Local address and port */
me.sin_family = AF_INET;
me.sin_port = htons(10101);
inet_aton("10.0.0.1", &me.sin_addr);

if (ioctl(listen_sock, FIONBIO, &sockmode) == SOCKET_ERROR) {
close(listen_sock);
exit(1);
}

if (bind(listen_sock, (struct sockaddr *)&me, sizeof(me)) ==
SOCKET_ERROR) {
close(listen_sock);
exit(1);
}

if (listen(listen_sock, SOMAXCONN) == SOCKET_ERROR) {
shutdown(listen_sock, SD_BOTH);
close(listen_sock);
exit(1);
}

while ((new_sock = accept(listen_sock, (struct sockaddr *)&client,
&SLen))
!= INVALID_SOCKET)
{
SLen = sizeof(peer);
memset(&peer, 0, SLen);
getsockopt(new_sock, SOL_IP, SO_ORIGINAL_DST, &peer, &SLen);
printf( "Client: %s:%hu\n", inet_ntoa(peer.sin_addr), ntohs(peer.sin_port));

if ( shutdown(new_sock, SD_BOTH) == SOCKET_ERROR ||
close(new_sock) == SOCKET_ERROR )
{
shutdown(listen_sock, SD_BOTH);
close(listen_sock);
exit(1);
}
}
if(new_sock == INVALID_SOCKET) {
shutdown(listen_sock, SD_BOTH);
close(listen_sock);
exit(1);
}

if (shutdown(listen_sock, SD_BOTH) == SOCKET_ERROR ||
close(listen_sock) == SOCKET_ERROR)
{
exit(1);
}

exit(0);
}


any help would be appreciated i have been working on this for days and its driving me nuts... is there a coding problem an iptables problem or a kernel problem?