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ipv6: yet another new IPV6_MTU_DISCOVER option IPV6_PMTUDISC_OMIT

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This option has the same semantic as IP_PMTUDISC_OMIT for IPv4 which
got recently introduced. It doesn't honor the path mtu discovered by the
host but in contrary to IPV6_PMTUDISC_INTERFACE allows the generation of
fragments if the packet size exceeds the MTU of the outgoing interface
MTU.

Fixes: 93b36cf342 ("ipv6: support IPV6_PMTU_INTERFACE on sockets")
Cc: Florian Weimer <fweimer@redhat.com>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Hannes Frederic Sowa 2014-02-26 01:20:43 +01:00 • committed by David S. Miller
commit 0b95227a7b
4 changed files with 18 additions and 6 deletions
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4
include/uapi/linux/in6.h
View file

@ -185,6 +185,10 @@ struct in6_flowlabel_req {
* also see comments on IP_PMTUDISC_INTERFACE
*/
#define IPV6_PMTUDISC_INTERFACE 4
/* weaker version of IPV6_PMTUDISC_INTERFACE, which allows packets to
* get fragmented if they exceed the interface mtu
*/
#define IPV6_PMTUDISC_OMIT 5
/* Flowlabel */
#define IPV6_FLOWLABEL_MGR 32