From: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
To: davem@davemloft.net, netdev@vger.kernel.org
Cc: yoshfuji@linux-ipv6.org
Subject: [PATCH net-next 04/19] ndisc: Introduce ndisc_fill_redirect_hdr_option().
Date: Tue, 22 Jan 2013 01:48:09 +0900 [thread overview]
Message-ID: <50FD7149.70304@linux-ipv6.org> (raw)
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
---
net/ipv6/ndisc.c | 21 +++++++++++++++------
1 file changed, 15 insertions(+), 6 deletions(-)
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index 539b2ec..53a545f 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -1341,6 +1341,19 @@ static void ndisc_redirect_rcv(struct sk_buff *skb)
icmpv6_notify(skb, NDISC_REDIRECT, 0, 0);
}
+static u8 *ndisc_fill_redirect_hdr_option(u8 *opt, struct sk_buff *orig_skb,
+ int rd_len)
+{
+ memset(opt, 0, 8);
+ *(opt++) = ND_OPT_REDIRECT_HDR;
+ *(opt++) = (rd_len >> 3);
+ opt += 6;
+
+ memcpy(opt, ipv6_hdr(orig_skb), rd_len - 8);
+
+ return opt + rd_len - 8;
+}
+
void ndisc_send_redirect(struct sk_buff *skb, const struct in6_addr *target)
{
struct net_device *dev = skb->dev;
@@ -1470,12 +1483,8 @@ void ndisc_send_redirect(struct sk_buff *skb, const struct in6_addr *target)
* build redirect option and copy skb over to the new packet.
*/
- memset(opt, 0, 8);
- *(opt++) = ND_OPT_REDIRECT_HDR;
- *(opt++) = (rd_len >> 3);
- opt += 6;
-
- memcpy(opt, ipv6_hdr(skb), rd_len - 8);
+ if (rd_len)
+ opt = ndisc_fill_redirect_hdr_option(opt, skb, rd_len);
msg->icmph.icmp6_cksum = csum_ipv6_magic(&saddr_buf, &ipv6_hdr(skb)->saddr,
len, IPPROTO_ICMPV6,
--
1.7.9.5
reply other threads:[~2013-01-21 16:48 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=50FD7149.70304@linux-ipv6.org \
--to=yoshfuji@linux-ipv6.org \
--cc=davem@davemloft.net \
--cc=netdev@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).