Re: [lwip-users] DHCP OK but TCP not? (Chen)

[Pomeroy, Marty]

 

I honestly don't know if this is an issue, but on 1.4.0, my startup also calls tcpip_init as below:

 

   g_EmacSetMacFromRegs( (char *)&m_NetIF.hwaddr); // init MAC address from the hardware

   IP4_ADDR(&eth0gw, 192,168,0,1);
   IP4_ADDR(&eth0ipaddr, 0,0,0,0);  // for DHCP, start with this IP
   IP4_ADDR(&eth0netmask, 255,255,255,0);

 

   tcpip_init( NULL, NULL);

 

   netif_add( &m_NetIF, &eth0ipaddr, &eth0netmask, &eth0gw, NULL, ethernetif_init, tcpip_input);

 

   dhcp_start( &m_NetIF)

     ...

After DHCP completes, try ping it from a computer on the subnet.

 

HTH!

 

Marty

 

---

From: address@hidden [mailto:address@hidden On Behalf Of Chen
Sent: Thursday, September 20, 2012 3:54 PM
To: address@hidden
Subject: [lwip-users] DHCP OK but TCP not? (Chen)

> Bad news, DHCP got the IP assigned, 
>   but I can't connect to it via TCP 
> anymore (UDP works fine), and the only 
>   difference in codes are
>
>     if 
>   (DHCP){
>          //This gets the 
>   IP, but I can't open via 
>   TCP
>             
>   IP4_ADDR( &xIpAddr,0,0,0,0 
>   );
>             
>   IP4_ADDR( &xNetMask,255,255,255,0 
>   );
>             
>   IP4_ADDR( &xGateway,0,0,0,0 
>   );
>             
>   netif_add( &MACB_if, &xIpAddr, &xNetMask, &xGateway, 
> NULL, 
>   ethernetif_init, tcpip_input 
>   );
>
>             
>   netif_set_default( &MACB_if 
>   );
>
>             
>   dhcp_start(&MACB_if);
>     }
>     
>   else{
>          //This works 
>   perfectly
>             
>   IP4_ADDR( 
>   &xIpAddr,myIP[0],myIP[1],myIP[2],myIP[3]);
>             
>   IP4_ADDR( &xNetMask,255,255,255,0 
>   );
>             
>   IP4_ADDR( &xGateway,0,0,0,0 
>   );
>             
>   netif_add( &MACB_if, &xIpAddr, &xNetMask, &xGateway, 
> NULL, 
>   ethernetif_init, tcpip_input 
>   );
>
>             
>   netif_set_default( &MACB_if 
>   );
>             
>   netif_set_up( &MACB_if );
>     
> }