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[INET]: Add IP(V6)_PMTUDISC_RPOBE

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Add IP(V6)_PMTUDISC_PROBE value for IP(V6)_MTU_DISCOVER.  This option forces
us not to fragment, but does not make use of the kernel path MTU discovery.
That is, it allows for user-mode MTU probing (or, packetization-layer path
MTU discovery).  This is particularly useful for diagnostic utilities, like
traceroute/tracepath.

Signed-off-by: John Heffner <jheffner@psc.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
John Heffner
2007-04-20 15:53:27 -07:00
committed by David S. Miller
parent b881ef7603
commit 628a5c5618
6 changed files with 31 additions and 10 deletions
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include/linux/in6.h
+1
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@@ -179,6 +179,7 @@ struct in6_flowlabel_req
#define IPV6_PMTUDISC_DONT 0
#define IPV6_PMTUDISC_WANT 1
#define IPV6_PMTUDISC_DO 2
#define IPV6_PMTUDISC_PROBE 3
/* Flowlabel */
#define IPV6_FLOWLABEL_MGR 32