Hi saket,
I need a small clarification.
You need root permission to do this right.
On 14 Feb 2012 11:38, "Saket Chawla" <[email protected]> wrote:
> Solved it and as a refrence to anyone who read this later
>
> To enable a lwip stack access to/from other network over unix port
> Here are the steps
>
> *sudo sysctl -w net.ipv4.ip_forward=1*
> *sudo ifconfig eth0 0.0.0.0 promisc up*
> *sudo brctl addbr br0*
> *sudo ifconfig br0 <bridge IP suitable to network you wih to be on>*
> *sudo brctl addif br0 eth0*
>
>
> Note : Remember bridging works only over ethernet not wirless interface
>
> Contrib version : 1.4.0
> Modifications to file contrib/ports/unix/netif/tapif.c
>
> *Function : low_level_init()*
> *Near about Line# 137*
> /* sprintf(buf, IFCONFIG_BIN IFCONFIG_ARGS,
> ip4_addr1(&(netif->gw)),
> ip4_addr2(&(netif->gw)),
> ip4_addr3(&(netif->gw)),
> ip4_addr4(&(netif->gw)));
> */
> snprintf(buf,sizeof(buf),"ifconfig tap0 0.0.0.0 promisc up");
> LWIP_DEBUGF(TAPIF_DEBUG, ("tapif_init: system(\"%s\");\n", buf));
> system(buf);
>
> snprintf(buf,sizeof(buf),"brctl addif br0 tap0");
> LWIP_DEBUGF(TAPIF_DEBUG, ("tapif_init: system(\"%s\");\n", buf));
> system(buf);
>
> sys_thread_new("tapif_thread", tapif_thread, netif,
> DEFAULT_THREAD_STACKSIZE, DEFAULT_THREAD_PRIO);
> }
> ......................................................
>
> This should make it work,
> however it may some time to establish the path and return intial reply to
> ping
> and may even show "Destination Host Unreachable" for inital packet replies
>
> If this take too much time or no connection at all then
>
> After you run the simhost application
> *sudo arp -s <LWIP stack IP> <Tap0 MAC address>*
>
> Tap0 MAC address changes everytime you execute the application
> so if it suddenly stops working then please repeat the last step
>
>
> Note :
> LWIP stack IP : Host IP
> Tap IP : Gateway IP
>
>
> --
>
> Thanks
> Regards
> Saket Chawla
>
> _______________________________________________
> lwip-users mailing list
> [email protected]
> https://lists.nongnu.org/mailman/listinfo/lwip-users
>
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