From: Masahide NAKAMURA <[EMAIL PROTECTED]>
IPv6 source address is replaced in receiving packet
with home address option carried by destination options header.
To send ICMPv6 error back, original address which is received one on wire
should be used. This function checks such header is included
and reverts them.
Based on MIPL2 kernel patch.
This patch was also written by: Ville Nuorvala <[EMAIL PROTECTED]>
Signed-off-by: Masahide NAKAMURA <[EMAIL PROTECTED]>
Signed-off-by: YOSHIFUJI Hideaki <[EMAIL PROTECTED]>
---
net/ipv6/icmp.c | 25 +++++++++++++++++++++++++
1 files changed, 25 insertions(+), 0 deletions(-)
diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c
index 4a6e911..37364a7 100644
--- a/net/ipv6/icmp.c
+++ b/net/ipv6/icmp.c
@@ -273,6 +273,29 @@ static int icmpv6_getfrag(void *from, ch
return 0;
}
+#ifdef CONFIG_IPV6_MIP6
+static void mip6_addr_swap(struct sk_buff *skb)
+{
+ struct ipv6hdr *iph = skb->nh.ipv6h;
+ struct inet6_skb_parm *opt = IP6CB(skb);
+ struct ipv6_destopt_hao *hao;
+ struct in6_addr tmp;
+ int off;
+
+ if (opt->dsthao) {
+ off = ipv6_find_tlv(skb, opt->dsthao, IPV6_TLV_HAO);
+ if (likely(off >= 0)) {
+ hao = (struct ipv6_destopt_hao *)(skb->nh.raw + off);
+ ipv6_addr_copy(&tmp, &iph->saddr);
+ ipv6_addr_copy(&iph->saddr, &hao->addr);
+ ipv6_addr_copy(&hao->addr, &tmp);
+ }
+ }
+}
+#else
+static inline void mip6_addr_swap(struct sk_buff *skb) {}
+#endif
+
/*
* Send an ICMP message in response to a packet in error
*/
@@ -350,6 +373,8 @@ void icmpv6_send(struct sk_buff *skb, in
return;
}
+ mip6_addr_swap(skb);
+
memset(&fl, 0, sizeof(fl));
fl.proto = IPPROTO_ICMPV6;
ipv6_addr_copy(&fl.fl6_dst, &hdr->saddr);
--
1.4.0
-
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
