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authorJohn Heffner <jheffner@psc.edu>2007-04-20 15:53:27 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2007-04-25 22:29:10 -0700
commit628a5c561890a9a9a74dea017873530584aab06e (patch)
treef10edc4078c3f19487bbe3a902ecadda89273361 /include/linux
parentb881ef7603230550aa0150b22af94089f07ab00d (diff)
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op-kernel-dev-628a5c561890a9a9a74dea017873530584aab06e.tar.gz
[INET]: Add IP(V6)_PMTUDISC_RPOBE
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>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/in.h1
-rw-r--r--include/linux/in6.h1
2 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/in.h b/include/linux/in.h
index 1912e7c..3975cbf 100644
--- a/include/linux/in.h
+++ b/include/linux/in.h
@@ -83,6 +83,7 @@ struct in_addr {
#define IP_PMTUDISC_DONT 0 /* Never send DF frames */
#define IP_PMTUDISC_WANT 1 /* Use per route hints */
#define IP_PMTUDISC_DO 2 /* Always DF */
+#define IP_PMTUDISC_PROBE 3 /* Ignore dst pmtu */
#define IP_MULTICAST_IF 32
#define IP_MULTICAST_TTL 33
diff --git a/include/linux/in6.h b/include/linux/in6.h
index 4e8350a..d559fac 100644
--- a/include/linux/in6.h
+++ b/include/linux/in6.h
@@ -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
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