[lwip-users] problem with netconn_accept

[shobhit saxena]

hello everyone,
                   i am using arm e7t board with ecos cofig tool & my
target is to establish LWIP-TCP/IP over PPP & have communication
between a server and ARM kit(client).I am using the lwip_init()
function to establish PPP connection.I am using the following code for
establishing TCP/IP .
my problem is that the program is running fine till the line
"newconn=netconn_accept(conn);"
but its not accepting connection.Is there something wrong with my code?
Is there any function to check the ip address that is being used?


static void simple_prog(CYG_ADDRESS data)
{
cyg_io_handle_t handle1;
cyg_io_lookup( "/dev/ser0", &handle1);
lwip_init();
   printf("\nConnected PPP\n");
struct netconn *conn, *newconn;
err_t err;
struct ip_addr *addr;
unsigned short port;
conn = netconn_new(NETCONN_TCP);
   cyg_thread_delay(50);

int bind_result = netconn_bind(conn, NULL, 2506);
//int bind_result = netconn_bind(conn,"192.168.0.4",2506);
   cyg_thread_delay(50);
   printf("\nBind to port 2506: [%d]", bind_result);
int listen_result = netconn_listen(conn);
   cyg_thread_delay(50);
   printf("\nListening: [%d]\nPress any key to begin accepting.",
listen_result);
   getchar();
   cyg_thread_delay(100);
int netconn_peer_result;
netconn_peer_result = netconn_peer(conn,NULL, NULL);

   printf("\nEntering while loop");
while(1) {
       printf("\nInside while loop");

   // --FROM HERE THE PROBLEM STARTS--//

       newconn=netconn_accept(conn);
       cyg_thread_delay(50);
       printf("\nAccept: [%d]", newconn);
       if(newconn != NULL)
       {
                 struct netbuf *buf;
                 void *data;
                 u16_t len;
                       while((buf = netconn_recv(newconn)) != NULL)
           {
           do {
                 netbuf_data(buf, &data, &len);
                 err = netconn_write(newconn, data, len, NETCONN_COPY);
                   if(err != ERR_OK) {    }
              } while(netbuf_next(buf) >= 0);
           netbuf_delete(buf);
                 }
                   netconn_delete(newconn);
               }
    }
}



void cyg_user_start(void)
{
   cyg_thread_create(4, simple_prog, (cyg_addrword_t) 0, "serial",
                     (void *)stack[0], STACKSIZE, &thread[0], &thread_obj[0]);
   cyg_thread_resume(thread[0]);
   cyg_scheduler_start();
}