netdev - Re: [PATCH 1/4 2.6.28] cxgb3 - manage a private ip address for iSCSI

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Date:	Fri, 22 Aug 2008 14:17:18 -0500
From:	Steve Wise <swise@...ngridcomputing.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Karen Xie <kxie@...lsio.com>, netdev@...r.kernel.org,
	open-iscsi@...glegroups.com, linux-scsi@...r.kernel.org,
	linux-kernel@...r.kernel.org, jgarzik@...ox.com,
	davem@...emloft.net, michaelc@...wisc.edu, rdreier@...co.com,
	daisyc@...ibm.com, wenxiong@...ibm.com, bhua@...ibm.com,
	divy@...lsio.com, dm@...lsio.com, leedom@...lsio.com
Subject: Re: [PATCH 1/4 2.6.28] cxgb3 - manage a private ip address for iSCSI

Andrew Morton wrote:
>> +	unsigned long octet;
>> +	const char *parse = buf;
>> +	char *endp;
>> +	int i;
>> +
>> +	for (i = 1; i <= 4; i++) {
>> +		octet = simple_strtoul(parse, &endp, 10);
>> +		if (endp == buf || octet > 255 ||
>> +		    (i < 4 && *endp != '.') ||
>> +		    (i == 4 && *endp != '\0' && *endp != '\n'))
>> +			return -EINVAL;
>> +		a = (a << 8) | octet;
>> +		parse = endp+1;
>> +	}
>> +	pi->iscsi_ipaddr = htonl(a);
>> +	return endp-buf;
>> +}
>>     
>
> This appears to be taking a dotted quad ipv4 address in ascii form,
> turning it into a u32 while performing checking?
>
> Surely we have a library function somewhere in networking which does
> this?  If not, I'd suggest writing one. 
>
>   

try in_aton() from include/linux/inet.h.




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