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Date: Mon, 24 Mar 2003 10:25:11 +0530 (IST)
From: Prasad <prasad_s@students.iiit.net>
To: shesha bhushan <bhushan_vadulas@hotmail.com>
cc: linux-kernel@vger.kernel.org, <kernelnewbies@nl.linux.org>
Subject: Re: GETHOSTBYNAME()
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hi,
	i dont think there is one similar to gethostbyname in the 
kernel-space.  I do think so because most of the work done by 
gethostbyname is based on the nameservices and is generally not required 
in the kernel-space.  Implementing it should not be that big a problem.
once you have the IP of the name server (/etc/resolve.conf???) you can 
always connect to it and get the IP of the given host.

Prasad.


On Mon, 24 Mar 2003, shesha bhushan wrote:

> Hi All
> I am trying to find the gethostbyname() equivalent function in kernel space. 
> Does any one know that.
> The reason is...
> I am using UDP to transfer data from one machine to another. It is not one 
> time transfer. Once I get a message from machine A; I need to send some 
> message back to Machine A from Machine B. For that I was using the following 
> lines in user space program. I need to do the same in kernel space. Could 
> any one help me out in this.
> 
> struct hostent *data;
> struct sockaddr_in server;
> int sock;
> 
>   sock = socket(AF_INET, SOCK_DGRAM , 0)
> 
> /* binding and all are done here */
> 
>   data = gethostbyname("158.168.1.1");
>   memcpy (&server.sin_addrs, data->h_addr, data->h_length);
>   retval = sendto(sock,msg,sizeof(msg), 0, (struct sockaddr *) &server, 
> sizeof server);
> 
> 
> Thanking You
> Shesha
> 
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