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SRv6 IETF 104 Hackathon

License: Apache License 2.0

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srv6-mobile's Issues

End.M.GTP6.DT6

When a node N receives a packet destined to S and S is a
local End.M.GTP6.DT6 SID, N does:

    1. IF NH=UDP & UDP_DST_PORT = GTP & inner_first_nibble = 6 THEN
    2.    IF inner IPv6 DA != link-local address
    3.       pop the outer IPv6, UDP and GTP headers
    4.       set the packet's associated FIB table to T1
    5.       resubmit the packet to the egress IPv6 FIB lookup and
             transmission to the inner IPv6 destination
    6.    ELSE
    7.       set the packet's associated FIB table to T2
    8.       resubmit the packet to the egress IPv6 FIB lookup and
             transmission to the outer IPv6 destination
    9. ELSE
   10.    Drop the packet

Configurable bit position for SID argument

Where to put/extract the SID argument (i.e, TEID) will be configurable based on the prefix length of the SID.

SRH TLV support for Error Indication message

#22

Fill up the UDP source port with hash

NH type config for GTP6.D

sub-issue of #12

no option: first nibble lookup
w/ ipv4 : GTP-U payload should only be IPv4
w/ ipv6 : GTP-U payload should only be IPv6
w/ non-ip: NH==59 (no next-header)

The following GTP-U messages will be mapping to SRv6. Each GTP-U message is indicated by Message Type value. Message Type is encoded in the Message Type field in GTP-U header. Encoding GTP-U Message Types in SRv6 is TBD.

Echo Request: 1
Echo Responce: 2
Error Indication: 26
End Marker: 254

GTP-U header format:

     0                   1                   2                   3
     0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     | Ver |P|R|E|S|N| Message Type  |           Length              |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |                Tunnel Endpoint Identifier                     |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |      Sequence Number          | N-PDU Number  |  Next-Ext-Hdr |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

5G QoS flow support

5G user plane requires a new GTP-U extension header "PDU Session Container" in which 6-bits QFI and 1-bit RQI are encoded as specified in 3GPP TS36.415 "PDU Session User Plane Protocol".

T.M.GTP4.D(former T.M.Tmap) and End.M.GTP6.D will to be able to copy QFI from the extension header in the incoming GTP-U packets to the 8-bits space in between the prefix and TEID of the last SID of outgoing IPv6/SRv6 packet.

End.M.GTP4/6.E will be able to copy 8-bits consists of PPI(always 0)/RQI/QFI from the SID argument of incoming packets to the extension header of outgoing GTP-U packets. Supporting PPP/PPI mapping is currently TBD.

GTP-U header with PDU Session container extension header in 4-octets row format is as following:

     GTP-U header
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     | 0x1 |1|0|1|0|0|     0xff      |           Length              |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |                           TEID                                |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |    Sequence Number = 0        |N-PDU Number=0 |NextExtHdr=0x85|
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

     GTP-U Extension Header (PDU Session Container)
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |  ExtHdrLen=2  | Type  | Spare |P|R|   QFI     | PPI |  Spare  |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |                    Padding                    |NextExtHdr=0x0 |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Type: 0 = Downlink (indicates RQI, QFI and PPP present)
      1 = Uplink (indicates only QFI presents)
P: PPI (Paging policy Indicator) PPI set to 1 indicates PPI presents.
R: RQI (Reflective QoS Indicator)

Define Message Encoding on SRH

Parent issue is #22 .

To be ready as a part of FD.io VPP distribution

IPv6 over GTP-U support

All srv6-mobile localsid and T.M.GTP4.D(former T.M.Tmap) will be able to support IPv6 over GTP-U case.

Config term of source address for gtp4.d/e

need to be more intuitive to configure src address.

Configurable bit position of argument support for End.M.GTP4.E

sub-issue of #15 for End.M.GTP4.E.

Optimize the docker image size

as of July 10:

$ ~/vpp/extras/ietf105$ docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
ietf105-image       latest              928adbda59c7        6 days ago          5.49GB