netdev - Re: [RFC 2/2] TCP: Add TCP-AO support

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Date:	Mon, 28 Jul 2008 13:33:40 -0400 (EDT)
From:	YOSHIFUJI Hideaki / 吉藤英明 
	<yoshfuji@...ux-ipv6.org>
To:	agl@...erialviolet.org
Cc:	netdev@...r.kernel.org, yoshfuji@...ux-ipv6.org
Subject: Re: [RFC 2/2] TCP: Add TCP-AO support

In article <396556a20807251434n300ca24bw833f51dc0a332676@...l.gmail.com> (at Fri, 25 Jul 2008 14:34:00 -0700), "Adam Langley" <agl@...erialviolet.org> says:

> /* struct tcp_auth_op_key - add, delete or replace a key
>  * @tcpak_addr - the address of the host to which this key applies
>  * @tcpak_keynum - the number of this key.
>  * @tcpak_tx_keyid - the keyid of this key on the wire when transmitted
>  * @tcpak_keylen - length of the key, in bytes
>  * @tcpak_key - the key data follows this structure
>  */
> struct tcp_auth_op_key {
> 	struct __kernel_sockaddr_storage	tcpak_addr;
> 	__u16					tcpak_keynum;
> 	__u8					tcpak_tx_keyid;
> 	__u8					tcpak_keylen;
> 	__u8					tcpak_reserved[4];
> 	__u8					tcpak_key[0];
> };

Let's share layout between tcp_md5sig{} and tcp_auth_op_key{} like this:
struct tcp_auth_op_key {
	struct __kernel_sockaddr_storage        tcpak_addr;
	__u16					tcpak_keynum;
	__u16					tcpak_keylen;
	__u8					tcpak_tx_keyid;
	__u8					tcpak_reserved[3];
	__u8					tcpak_key[0];
};

Then we can share TCP_AUTH_KEY_SET and TCP_MD5SIG.

--yoshfuji
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