This patchset adds the VRF processing in SCTP. Simliar to TCP/UDP, it includes socket bind and socket/association lookup changes. For socket bind change, it allows sockets to bind to a VRF device and allows multiple sockets with the same IP and PORT to bind to different interfaces in patch 1-3. For socket/association lookup change, it adds dif and sdif check in both asoc and ep lookup in patch 4 and 5, and when binding to nodev, users can decide if accept the packets received from one l3mdev by setup a sysctl option in patch 6. Note with VRF support, in a netns, an association will be decided by src ip + src port + dst ip + dst port + bound_dev_if, and it's possible for ss to have: # ss --sctp -n State Local Address:Port Peer Address:Port ESTAB 192.168.1.2%vrf-s1:1234 `- ESTAB 192.168.1.2%veth1:1234 192.168.1.1:1234 ESTAB 192.168.1.2%vrf-s2:1234 `- ESTAB 192.168.1.2%veth2:1234 192.168.1.1:1234 See the selftest in patch 7 for more usage. Also, thanks Carlo for testing this patch series on their use. Xin Long (7): sctp: verify the bind address with the tb_id from l3mdev sctp: check ipv6 addr with sk_bound_dev if set sctp: check sk_bound_dev_if when matching ep in get_port sctp: add skb_sdif in struct sctp_af sctp: add dif and sdif check in asoc and ep lookup sctp: add sysctl net.sctp.l3mdev_accept selftests: add a selftest for sctp vrf Documentation/networking/ip-sysctl.rst | 9 ++ include/net/netns/sctp.h | 4 + include/net/sctp/sctp.h | 16 ++- include/net/sctp/structs.h | 9 +- net/sctp/diag.c | 3 +- net/sctp/endpointola.c | 13 +- net/sctp/input.c | 98 +++++++------- net/sctp/ipv6.c | 22 +++- net/sctp/protocol.c | 19 ++- net/sctp/socket.c | 9 +- net/sctp/sysctl.c | 11 ++ tools/testing/selftests/net/Makefile | 2 + tools/testing/selftests/net/sctp_hello.c | 139 ++++++++++++++++++++ tools/testing/selftests/net/sctp_vrf.sh | 160 +++++++++++++++++++++++ 14 files changed, 445 insertions(+), 69 deletions(-) create mode 100644 tools/testing/selftests/net/sctp_hello.c create mode 100755 tools/testing/selftests/net/sctp_vrf.sh -- 2.31.1
