Ignat Korchagin ed6ae5ca43 sit: allow encapsulated IPv6 traffic to be delivered locally ... While experimenting with FOU encapsulation Amir noticed that encapsulated IPv6 traffic fails to be delivered, if the peer IP address is configured locally. It can be easily verified by creating a sit interface like below: $ sudo ip link add name fou_test type sit remote 127.0.0.1 encap fou encap-sport auto encap-dport 1111 $ sudo ip link set fou_test up and sending some IPv4 and IPv6 traffic to it $ ping -I fou_test -c 1 1.1.1.1 $ ping6 -I fou_test -c 1 fe80::d0b0:dfff:fe4c:fcbc "tcpdump -i any udp dst port 1111" will confirm that only the first IPv4 ping was encapsulated and attempted to be delivered. This seems like a limitation: for example, in a cloud environment the "peer" service may be arbitrarily scheduled on any server within the cluster, where all nodes are trying to send encapsulated traffic. And the unlucky node will not be able to. Moreover, delivering encapsulated IPv4 traffic locally is allowed. But I may not have all the context about this restriction and this code predates the observable git history. Reported-by: Amir Razmjou <arazmjou@cloudflare.com> Signed-off-by: Ignat Korchagin <ignat@cloudflare.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20220107123842.211335-1-ignat@cloudflare.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>		2022-01-12 13:56:07 -08:00
..
6lowpan	6lowpan: iphc: Fix an off-by-one check of array index	2021-07-22 16:19:03 +02:00
9p	9p: fix a bunch of checkpatch warnings	2021-11-04 21:04:25 +09:00
802	net: 802: Use memset_startat() to clear struct fields	2021-11-19 11:23:23 +00:00
8021q	vlan: add net device refcount tracker	2021-12-07 20:44:58 -08:00
appletalk	net: socket: rework compat_ifreq_ioctl()	2021-07-23 14:20:25 +01:00
atm	net: atm: use address setting helpers	2021-10-24 13:59:45 +01:00
ax25	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2022-01-09 17:00:17 -08:00
batman-adv	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2022-01-05 14:36:10 -08:00
bluetooth	Bluetooth: hci_sock: fix endian bug in hci_sock_setsockopt()	2022-01-07 08:41:38 +01:00
bpf	bpf: Add dummy BPF STRUCT_OPS for test purpose	2021-11-01 14:10:00 -07:00
bpfilter	bpfilter: Specify the log level for the kmsg message	2021-06-25 13:13:50 +02:00
bridge	net: bridge: fix net device refcount tracking issue in error path	2022-01-12 14:44:18 +00:00
caif	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next	2021-12-31 14:35:40 +00:00
can	can: isotp: convert struct tpcon::{idx,len} to unsigned int	2022-01-05 21:49:47 +01:00
ceph	libceph, ceph: move ceph_osdc_copy_from() into cephfs code	2021-11-08 03:29:52 +01:00
core	net: fix sock_timestamping_bind_phc() to release device	2022-01-12 14:16:15 +00:00
dcb	net: dcb: Return the correct errno code	2021-06-01 17:01:33 -07:00
dccp	dccp: Inline dccp_listen_start().	2021-11-23 20:16:22 -08:00
decnet	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next	2021-12-31 14:35:40 +00:00
dns_resolver	net: remove redundant 'depends on NET'	2021-01-27 17:04:12 -08:00
dsa	net: dsa: setup master before ports	2022-01-06 11:59:10 +00:00
ethernet	gro: remove rcu_read_lock/rcu_read_unlock from gro_complete handlers	2021-11-24 17:21:42 -08:00
ethtool	ethtool: use phydev variable	2022-01-06 12:33:35 +00:00
hsr	net: Write lock dev_base_lock without disabling bottom halves.	2021-11-29 12:12:36 +00:00
ieee802154	net: drop nopreempt requirement on sock_prot_inuse_add()	2021-11-16 13:20:45 +00:00
ife	net: remove redundant 'depends on NET'	2021-01-27 17:04:12 -08:00
ipv4	gre: Don't accidentally set RTO_ONLINK in gre_fill_metadata_dst()	2022-01-11 20:36:08 -08:00
ipv6	sit: allow encapsulated IPv6 traffic to be delivered locally	2022-01-12 13:56:07 -08:00
iucv	net: Don't include filter.h from net/sock.h	2021-12-29 08:48:14 -08:00
kcm	net: Don't include filter.h from net/sock.h	2021-12-29 08:48:14 -08:00
key	net: Remove unnecessary variables	2021-05-26 07:03:39 +02:00
l2tp	l2tp: add netns refcount tracker to l2tp_dfs_seq_data	2021-12-10 06:38:27 -08:00
l3mdev	l3mdev: Correct function names in the kerneldoc comments	2021-03-28 17:56:55 -07:00
lapb	net: lapb: Use list_for_each_entry() to simplify code in lapb_iface.c	2021-06-08 16:31:25 -07:00
llc	sock: Use sock_owned_by_user_nocheck() instead of sk_lock.owned.	2021-12-10 19:43:00 -08:00
mac80211	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2022-01-05 14:36:10 -08:00
mac802154	mac802154: use dev_addr_set() - manual	2021-10-20 14:27:40 +01:00
mctp	mctp: test: zero out sockaddr	2022-01-11 20:26:36 -08:00
mpls	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2021-12-02 11:44:56 -08:00
mptcp	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2022-01-09 17:00:17 -08:00
ncsi	net/ncsi: check for error return from call to nla_put_u32	2021-12-29 17:53:24 -08:00
netfilter	netfilter: nf_tables: typo NULL check in _clone() function	2022-01-10 21:09:43 -08:00
netlabel	net: fix NULL pointer reference in cipso_v4_doi_free	2021-08-30 12:23:18 +01:00
netlink	net: Don't include filter.h from net/sock.h	2021-12-29 08:48:14 -08:00
netrom	netrom: fix api breakage in nr_setsockopt()	2022-01-07 14:11:05 +00:00
nfc	nfc: fix potential NULL pointer deref in nfc_genl_dump_ses_done	2021-12-09 07:50:32 -08:00
nsh	…
openvswitch	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2022-01-09 17:00:17 -08:00
packet	af_packet: fix tracking issues in packet_do_bind()	2022-01-07 19:11:55 -08:00
phonet	phonet/pep: refuse to enable an unbound pipe	2021-12-20 11:49:51 +00:00
psample	psample: Add additional metadata attributes	2021-03-14 15:00:43 -07:00
qrtr	net: qrtr: combine nameservice into main module	2021-09-28 17:36:43 -07:00
rds	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2021-12-16 16:13:19 -08:00
rfkill	rfkill: allow to get the software rfkill state	2021-12-20 11:02:38 +01:00
rose	net: Don't include filter.h from net/sock.h	2021-12-29 08:48:14 -08:00
rxrpc	rxrpc: Fix rxrpc_local leak in rxrpc_lookup_peer()	2021-11-29 15:40:02 +00:00
sched	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2022-01-09 17:00:17 -08:00
sctp	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2022-01-05 14:36:10 -08:00
smc	net/smc: fix possible NULL deref in smc_pnet_add_eth()	2022-01-12 14:45:29 +00:00
strparser	bpf: sockmap, strparser, and tls are reusing qdisc_skb_cb and colliding	2021-11-09 01:05:28 +01:00
sunrpc	NFS client bugfixes for Linux 5.16	2021-11-27 10:33:55 -08:00
switchdev	net: switchdev: add net device refcount tracker	2021-12-07 20:44:58 -08:00
tipc	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2022-01-05 14:36:10 -08:00
tls	net/tls: Fix skb memory leak when running kTLS traffic	2022-01-07 18:42:18 -08:00
unix	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next	2021-12-31 14:35:40 +00:00
vmw_vsock	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next	2021-12-31 14:35:40 +00:00
wireless	This time we have:	2021-12-21 07:41:52 -08:00
x25	net: x25: drop harmless check of !more	2021-12-09 18:35:11 -08:00
xdp	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2022-01-05 14:36:10 -08:00
xfrm	xfrm: Don't accidentally set RTO_ONLINK in decode_session4()	2022-01-11 20:36:08 -08:00
Kconfig	net: kunit: add a test for dev_addr_lists	2021-11-20 12:25:57 +00:00
Kconfig.debug	net: add networking namespace refcount tracker	2021-12-10 06:38:26 -08:00
Makefile	mctp: Add MCTP base	2021-07-29 15:06:49 +01:00
compat.c	net: Return the correct errno code	2021-06-03 15:13:56 -07:00
devres.c	net: devres: Correct a grammatical error	2021-06-11 12:55:28 -07:00
socket.c	net: fix SOF_TIMESTAMPING_BIND_PHC to work with multiple sockets	2022-01-06 12:18:08 +00:00
sysctl_net.c	sections: move and rename core_kernel_data() to is_kernel_core_data()	2021-11-09 10:02:50 -08:00