changeing the IP address

[Dominique Bastien]

you need to pass via the ioctl function :

#define satosin(sa)  ((struct sockaddr_in *) (sa))

   struct ifreq   IntRequest;

   // Set new IP address.   
   IntRequest.ifr_ifno = PortIndex;

   satosin(&IntRequest.ifr_addr)->sin_family       = AF_INET;
   satosin(&IntRequest.ifr_addr)->sin_addr.s_addr  = htonl( NiIPAddr );

   ioctl ( MySocket, SIOCSIFADDR, (char *)&IntRequest );
       
   // Set new Network Mask.
   IntRequest.ifr_ifno = PortIndex;

   satosin(&IntRequest.ifr_addr)->sin_family       = AF_INET;
   satosin(&IntRequest.ifr_addr)->sin_addr.s_addr  = htonl( NiNetMask );

   ioctl ( MySocket, SIOCSIFNETMASK, (char *)&IntRequest );


p.s. to program the IP stack and other network component you can read
Richard Stevens, he
made a realy good job in his books.

Dominique Bastien

> -----Message d'origine-----
> De:	320094152587-0001 at t-online.de [SMTP:320094152587-0001 at t-online.de]
> Date:	22 mai 2000 12:04
> À:	RTEMS List
> Objet:	changeing the IP address
> 
> Is it possible to change the IP address (, netmask and gateway)
> from a running system without reboot (re-init) ?
> 
> I only found a reference on setting up the address at init time
> but don't realy understand if the same thing should be used
> for reconfiguration at runtime.
> 
> TIA,
> Erwin
> 
> -- 
>         Q - S O F T - E N G I N E E R I N G 
>      Rodachtalweg 11, 81549 Muenchen, Germany
> 
> Erwin Rol (Software Engineer)     phone: +49-89-68050051
> Erwin.Rol at Q-Soft-Engineering.com  fax  : +49-89-68050052