Re: [Qemu-devel] Status of user-mode networking for win32

[Elefterios Stamatogiannakis <estama@dblab.ece.ntua.gr>]

  Mmmmmm.

  If i understand correctly ne2000 links the guest with the host.

  This connection works for me because i can get a dhcp lease from the 
qemu-slirp throught ne2000.

  I can also ping the dhcp server.

  My problem is with the host -> internet connection from what i can 
understand.

  Qemu doesn't seem to open a "real" socket with the outside world at all.

  Also all the above are using win2k as a host with linux as a guest.

  teris.


Renzo Davoli wrote:

> On Mon, Jun 07, 2004 at 05:01:35PM +0300, Elefterios Stamatogiannakis wrote:
> 
>> The problem is that it doesn't seem to connect to the outside world.
> 
> I have seen with a packet sniffer that the packet payload was 16 bits
> misaligned.
> 
> I have tried the workaround here included as a patch and 
> Win98+vdeqemu pci works.
> 
> I am trying to figure out if this is a correct patch or it is the 
> writel/readl call parameter to be wrong. (word sized transfers should be
> aligned...)
> 
> renzo
> ---------------
> --- hw/ne2000.c.orig    2004-06-07 16:14:28.000000000 +0200
> +++ hw/ne2000.c 2004-06-07 16:27:14.000000000 +0200
> @@ -401,7 +401,8 @@
>  static inline void ne2000_mem_writel(NE2000State *s, uint32_t addr, 
>                                       uint32_t val)
>  {
> -    addr &= ~3; /* XXX: check exact behaviour if not even */
> +    /*addr &= ~3; XXX: check exact behaviour if not even */
> +    addr &= ~1; /* XXX: check exact behaviour if not even */
>      if (addr < 32 || 
>          (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) {
>          *(uint32_t *)(s->mem + addr) = cpu_to_le32(val);
> @@ -431,7 +432,8 @@
>  
>  static inline uint32_t ne2000_mem_readl(NE2000State *s, uint32_t addr)
>  {
> -    addr &= ~3; /* XXX: check exact behaviour if not even */
> +    /*addr &= ~3;  XXX: check exact behaviour if not even */
> +    addr &= ~1; /* XXX: check exact behaviour if not even */
>      if (addr < 32 || 
>          (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) {
>          return le32_to_cpu(*(uint32_t *)(s->mem + addr));
> 
> 
> 
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