Ridge Kennedy f3dea4cea6 l2tp: Allow duplicate session creation with UDP ... [ Upstream commit 0d0d9a388a ] In the past it was possible to create multiple L2TPv3 sessions with the same session id as long as the sessions belonged to different tunnels. The resulting sessions had issues when used with IP encapsulated tunnels, but worked fine with UDP encapsulated ones. Some applications began to rely on this behaviour to avoid having to negotiate unique session ids. Some time ago a change was made to require session ids to be unique across all tunnels, breaking the applications making use of this "feature". This change relaxes the duplicate session id check to allow duplicates if both of the colliding sessions belong to UDP encapsulated tunnels. Fixes: dbdbc73b44 ("l2tp: fix duplicate session creation") Signed-off-by: Ridge Kennedy <ridge.kennedy@alliedtelesis.co.nz> Acked-by: James Chapman <jchapman@katalix.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2020-02-11 04:35:04 -08:00
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Kconfig	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
Makefile	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
l2tp_core.c	l2tp: Allow duplicate session creation with UDP	2020-02-11 04:35:04 -08:00
l2tp_core.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
l2tp_debugfs.c	l2tp: no need to check return value of debugfs_create functions	2019-06-14 08:45:05 -07:00
l2tp_eth.c	net: core: add generic lockdep keys	2019-10-24 14:53:48 -07:00
l2tp_ip.c	netfilter: drop bridge nf reset from nf_reset	2019-10-01 18:42:15 +02:00
l2tp_ip6.c	net: ipv6: add net argument to ip6_dst_lookup_flow	2019-12-18 16:08:40 +01:00
l2tp_netlink.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
l2tp_ppp.c	compat_ioctl: pppoe: fix PPPOEIOCSFWD handling	2019-07-30 14:42:13 -07:00