RE : RE : [lwip-users] Source MAC address

[Frédéric BERNON]

Strange, a broadcast address as source ? Just for my information, which 
protocol need/use that ?

  
====================================
Frédéric BERNON 
HYMATOM SA 
Chef de projet informatique 
Microsoft Certified Professional 
Tél. : +33 (0)4-67-87-61-10 
Fax. : +33 (0)4-67-70-85-44 
Email : address@hidden 
Web Site : http://www.hymatom.fr 
====================================
P Avant d'imprimer, penser à l'environnement
 


-----Message d'origine-----
De : address@hidden [mailto:address@hidden De la part de Nicolas Pinault
Envoyé : mardi 18 décembre 2007 08:50
À : Mailing list for lwIP users
Objet : Re: RE : [lwip-users] Source MAC address


Hi,

Frédéric BERNON a écrit :
> Hi,
>
> I think you could use etharp_find_addr to read the ARP table :
>
>   
Sorry but I can't since sometimes source IP address is broadcast 
(255.255.255.255).

Nicolas



> s
> /**
>  * Finds (stable) ethernet/IP address pair from ARP table
>  * using interface and IP address index.
>  * @note the addresses in the ARP table are in network order!
>  *
>  * @param netif points to interface index
>  * @param ipaddr points to the (network order) IP address index
>  * @param eth_ret points to return pointer
>  * @param ip_ret points to return pointer
>  * @return table index if found, -1 otherwise
>  */
> s8_t etharp_find_addr(struct netif *netif, struct ip_addr *ipaddr, 
> struct eth_addr **eth_ret, struct ip_addr **ip_ret);
>
>  
>   
> ====================================
> Frédéric BERNON
> HYMATOM SA 
> Chef de projet informatique 
> Microsoft Certified Professional 
> Tél. : +33 (0)4-67-87-61-10 
> Fax. : +33 (0)4-67-70-85-44 
> Email : address@hidden 
> Web Site : http://www.hymatom.fr 
> ====================================
> P Avant d'imprimer, penser à l'environnement
>  
>
>
> -----Message d'origine-----
> De : address@hidden 
> [mailto:address@hidden De 
> la part de Nicolas Pinault Envoyé : lundi 17 décembre 2007 17:00 À : 
> Mailing list for lwIP users Objet : [lwip-users] Source MAC address
>
>
> Hi all,
>
> My system uses non connected sockets (UDP) to get data from other
> machines. Some packets are received thru broadcast address 
> (255.255.255.255).
> In the thread wich manages the rx socket, I'd like to know the sender 
> MAC address. I allready have the sender IP address but that is not what 
> I want.
> It seems it is not posible to get this information without a big 
> modification of lwip.
> I am wrong ?
>
> Nicolas
>
>
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