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IPv6: Complete IPV6_DONTFRAG support

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Finally add support to detect a local IPV6_DONTFRAG event
and return the relevant data to the user if they've enabled
IPV6_RECVPATHMTU on the socket.  The next recvmsg() will
return no data, but have an IPV6_PATHMTU as ancillary data.

Signed-off-by: Brian Haley <brian.haley@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Brian Haley
2010-04-23 11:26:09 +00:00
committed by David S. Miller
parent 13b52cd446
commit 4b340ae20d
7 changed files with 116 additions and 8 deletions
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2
include/linux/ipv6.h
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@@ -257,6 +257,7 @@ struct inet6_skb_parm {
};
#define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
#define IP6CBMTU(skb) ((struct ip6_mtuinfo *)((skb)->cb))
static inline int inet6_iif(const struct sk_buff *skb)
{
@@ -366,6 +367,7 @@ struct ipv6_pinfo {
struct ipv6_txoptions *opt;
struct sk_buff *pktoptions;
struct sk_buff *rxpmtu;
struct {
struct ipv6_txoptions *opt;
u8 hop_limit;