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From: Andrew Lunn <andrew@lunn.ch>
To: Goran Pantar <gpantar@xylon.hr>
Cc: ecos-discuss@ecos.sourceware.org
Subject: Re: [ECOS] Runtime network reinit
Date: Wed, 11 May 2005 20:42:00 -0000	[thread overview]
Message-ID: <20050511202334.GT31731@lunn.ch> (raw)
In-Reply-To: <9D79B9A9194389468A922F618415D0A4020435@abc.xylon.local>

On Mon, May 09, 2005 at 12:11:15PM +0200, Goran Pantar wrote:
> Hi,
> I have initialised the Network stack using fixed IP adresses. I would
> now like the possibility to change the IP address at runtime. Is this
> possible in eCos?
> 
> Parts of my network intialisation procedure:
> ..
>    s = socket(AF_INET, SOCK_DGRAM, 0);
> ..
>    ioctl(s, SIOCSIFHWADDR, &ifr);
>    close(s);
> ..
>    eth0_bootp_data.bp_op = BOOTREPLY;
>    eth0_bootp_data.bp_htype = HTYPE_ETHERNET;
>    eth0_bootp_data.bp_hlen = ETHER_ADDR_LEN;
>    for(i = 0;  i < eth0_bootp_data.bp_hlen;  i++)
>    {
>      eth0_bootp_data.bp_chaddr[i] = 0xFF;
>    }
>    eth0_bootp_data.bp_ciaddr.s_addr = *(in_addr_t *)NetHeader.addr_ip;
>    eth0_bootp_data.bp_yiaddr.s_addr = *(in_addr_t *)NetHeader.addr_ip;
>    eth0_bootp_data.bp_siaddr.s_addr = *(in_addr_t
> *)NetHeader.addr_server;
>    eth0_bootp_data.bp_giaddr.s_addr = *(in_addr_t
> *)NetHeader.addr_gateway;
> ..
>    init_net(eth0_name, &eth0_bootp_data);
> ..
> 
> The obove procedure initializes the network sucessfully and all the
> services are working. But when I run the same procedure (with changed IP
> addresses) init_net fails with a diag print: SIOCIFADDR: File exist.

You probably need to make a couple of ioctl calls to remove the
current addressing information before you can call init_net again.

        Andrew

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      reply	other threads:[~2005-05-11 20:23 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-05-09 15:53 Goran Pantar
2005-05-11 20:42 ` Andrew Lunn [this message]

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