netdev - [PATCH net-next 02/15] rose: Set the destination address in rose

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Message-ID: <877fv09but.fsf_-_@x220.int.ebiederm.org>
Date:	Mon, 02 Mar 2015 00:01:30 -0600
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	David Miller <davem@...emloft.net>
Cc:	netdev@...r.kernel.org, Ralf Baechle <ralf@...ux-mips.org>,
	linux-hams@...r.kernel.org
Subject: [PATCH net-next 02/15] rose: Set the destination address in rose_header


Not setting the destination address is a bug that I suspect causes no
problems today, as only the arp code seems to call dev_hard_header and
the description I have of rose is that it is expected to be used with a
static neigbour table.

I have derived the offset and the length of the rose destination address
from rose_rebuild_header where arp_find calls neigh_ha_snapshot to set
the destination address.

Cc: Ralf Baechle <ralf@...ux-mips.org>
Cc: linux-hams@...r.kernel.org
Signed-off-by: "Eric W. Biederman" <ebiederm@...ssion.com>
---
 net/rose/rose_dev.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/rose/rose_dev.c b/net/rose/rose_dev.c
index 50005888be57..24d2b40b6c6b 100644
--- a/net/rose/rose_dev.c
+++ b/net/rose/rose_dev.c
@@ -41,6 +41,9 @@ static int rose_header(struct sk_buff *skb, struct net_device *dev,
 {
 	unsigned char *buff = skb_push(skb, ROSE_MIN_LEN + 2);
 
+	if (daddr)
+		memcpy(buff + 7, daddr, dev->addr_len);
+
 	*buff++ = ROSE_GFI | ROSE_Q_BIT;
 	*buff++ = 0x00;
 	*buff++ = ROSE_DATA;
-- 
2.2.1

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