1.1 --- a/xen/net/dev.c	Wed Oct 08 14:15:08 2003 +0000
     1.2 +++ b/xen/net/dev.c	Thu Oct 09 08:44:10 2003 +0000
     1.3 @@ -1800,20 +1800,28 @@ int __init net_dev_init(void)
     1.4      return 0;
     1.5  }
     1.6  
     1.7 -inline int init_tx_header(u8 *data, unsigned int len, struct net_device *dev)
     1.8 +inline int init_tx_header(net_vif_t *vif, u8 *data, 
     1.9 +                          unsigned int len, struct net_device *dev)
    1.10  {
    1.11 +    int proto = ntohs(*(unsigned short *)(data + 12));
    1.12 +
    1.13      memcpy(data + ETH_ALEN, dev->dev_addr, ETH_ALEN);
    1.14          
    1.15 -    switch ( ntohs(*(unsigned short *)(data + 12)) )
    1.16 +    switch ( proto )
    1.17      {
    1.18      case ETH_P_ARP:
    1.19          if ( len < 42 ) break;
    1.20          memcpy(data + 22, dev->dev_addr, ETH_ALEN);
    1.21 -        return ETH_P_ARP;
    1.22 +        break;
    1.23      case ETH_P_IP:
    1.24 -        return ETH_P_IP;
    1.25 +        break;
    1.26 +    default:
    1.27 +        /* Unsupported protocols are onyl allowed to/from VIF0/0. */
    1.28 +        if ( (vif->domain->domain != 0) || (vif->idx != 0) )
    1.29 +            proto = 0;
    1.30 +        break;
    1.31      }
    1.32 -    return 0;
    1.33 +    return proto;
    1.34  }
    1.35  
    1.36  
    1.37 @@ -1884,7 +1892,7 @@ static int get_tx_bufs(net_vif_t *vif)
    1.38          g_data = map_domain_mem(tx.addr);
    1.39  
    1.40          protocol = __constant_htons(
    1.41 -            init_tx_header(g_data, tx.size, the_dev));
    1.42 +            init_tx_header(vif, g_data, tx.size, the_dev));
    1.43          if ( protocol == 0 )
    1.44          {
    1.45              __make_tx_response(vif, tx.id, RING_STATUS_BAD_PAGE);