Subject: Re: getting rid of NTOHS() in ip_input()
To: enami tsugutomo <enami@sm.sony.co.jp>
From: None <itojun@iijlab.net>
List: tech-net
Date: 08/13/2002 14:31:50 
>> -			NTOHS(ip->ip_len);
>> -			ip->ip_len += msiz;
>> +			ip->ip_len = htons(ntohs(ip->ip_len) + msiz);
>You are modifying mbuf anyway, aren't you?
>m_pullup if mbuf is readonly is better, isn't it?

	for this particular case (sys/net/if_gre.c) this portion is adjusting
	length field of encapsulating IP header, which was allocated by
	MGETHDR.  therefore it is totally safe.

itojun