Hello,
I am pretty new in using lwip and want to ask your recommendations on
an issue about using 2 IP numbers at the same time.
Let me describe my design first:
I am working on an Xilinx ML-403 platform and writing code for PPC
inside the FGPGA. I have an ethernet interface for communication and
using LwIP(LwIP 2.00.a version) for it.
Also using Xilinx MicroKernel.
Simply my application will have a static IP number and will communicate
with another system which has a static IP number too.
But now another requirement has been arised. That is my application must
communicate with a second system from an another IP number. And I
still have one physical ethernet port.
This means that my application must have 2 IP numbers. And it must
listen both connections at the same time.
>From mail group , I read that this is possible with creating seperate
network interfaces with 'netif_add' function.
In my design , I thought of creating two threads which will establish
two sockets and add seperate network interfaces at the same time.
But it didn`t work. While I could communicate with one IP number , the
other connection could not be established.
Here is my thread that I use for creating socket:
void *socket_app_thread( void *arg )
{
.....//declarations an initializations IP, port , MAC, subnet, gw
xtemacif_setmac( 0, ( u8_t* )fullmac ); //Set MAC
IP4_ADDR( &gw, gateway[ 0 ], gateway[ 1 ], gateway[ 2 ], gateway[ 3 ]
);
//Set gateway
IP4_ADDR( &ipaddr, ip[ 0 ], ip[ 1 ], ip[ 2 ], ip[ 3 ] ); //Set ip
IP4_ADDR( &netmask, subnet[ 0 ], subnet[ 1 ], subnet[ 2 ], subnet[ 3
] );
//Set subnet msk
/* allocate netif structure */
default_netif = mem_malloc( sizeof( struct netif ) );
if ( default_netif == NULL )
{
return NULL;
}
default_netif = netif_add( default_netif,
&ipaddr,
&netmask,
NULL,
&XTemacIf_ConfigTable[ 0 ],
xtemacif_init,
tcpip_input );
netif_set_default( default_netif );
/* Register XEmacHandler with interrupt controller and enable
interrupts
* with XMK
*/
register_int_handler(
XPAR_OPB_INTC_0_TRIMODE_MAC_GMII_IP2INTC_IRPT_INTR,
(XInterruptHandler )XTemac_IntrFifoHandler,
xtemacif_ptr->instance_ptr );
/* Enable EMAC interrupts in XMK */
enable_interrupt( XPAR_OPB_INTC_0_TRIMODE_MAC_GMII_IP2INTC_IRPT_INTR
);
/*----------------------------------------------------------------------
-*/
/* create socket and start application
*/
/*----------------------------------------------------------------------
-*/
sock = socket( AF_INET, SOCK_STREAM, 0 );
addr.sin_family = AF_INET;
addr.sin_port = htons( port );
addr.sin_addr.s_addr = INADDR_ANY;
bind( sock, ( struct sockaddr* ) &addr, sizeof( addr ) );
listen( sock, 7);
SockDesc = accept( sock, ( struct sockaddr* ) &rem, &lensock );
}
The second thread is similar with this one, only IP and port number is
different.
Do you have any idea where I am having mistakes?
I really appreciate for your help.
Thanks in advance.
Koray.
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