ADD: SRv6 SID NLRI

[Azunyan19]

• ADD: SRv6 SID NLRI (https://datatracker.ietf.org/doc/rfc9514/)
  • SRv6 SID Information TLV
  • Multi-Topology Identifier TLV
• FIX: Existing BGP-LS Implementations
  • LsAddrPrefix Length
  • Recognize local-bgp-router-id as IPv4
  • Remove unused function (parseLsLinkProtocol())
  • Remove unused argument from parseLsArgs()
  • Sort BGP-LS TLVs
    • Add GetLsTLV() method to get LsTLVType from []LsTLVInterface
    • Please point out if GetLsTLV() is unnecessary

[watal]

Usage Examples:

• Registering a route:

gobgp global rib add -a ls srv6sid bgp identifier 0 local-asn 65000 local-bgp-ls-id 0 local-bgp-router-id 192.168.255.1 local-bgp-confederation-member 1 sids fd00::1 multi-topology-id 1

• Checking routes:

gobgp global rib -a ls
   Network                                                                                Next Hop             AS_PATH              Age        Attrs
*> NLRI { SRv6SID { LOCAL_NODE:  SRv6SID: {SIDs: fd00::1} MultiTopo: {MultiTopoIDs: 1}} } 0.0.0.0                                   00:00:26   [{Origin: ?}]

[fujita]

Usage Examples:

• Registering a route:

gobgp global rib add -a ls srv6sid bgp identifier 0 local-asn 65000 local-bgp-ls-id 0 local-bgp-router-id 192.168.255.1 local-bgp-confederation-member 1 sids fd00::1 multi-topology-id 1

• Checking routes:

gobgp global rib -a ls
   Network                                                                                Next Hop             AS_PATH              Age        Attrs
*> NLRI { SRv6SID { LOCAL_NODE:  SRv6SID: {SIDs: fd00::1} MultiTopo: {MultiTopoIDs: 1}} } 0.0.0.0                                   00:00:26   [{Origin: ?}]

Can you add the above to docs directory?

[watal]

@fujita
I've finished the documentation.
082d8e2

I renamed lib-ls.md to bgp-ls.md and updated it to explain both using GoBGP as a daemon and as a library.

The command execution examples are based on the following PRs:

• NODE NLRI
  • BGP-LS data exchange functions for gRPC #2618
• LINK NLRI
  • Add option to register BGP-LS NLRI in gobgp command #2656
• SRv6 SID NLRI
  • this PR

I have also fixed a bug in the previous output.

gobgp global rib -a ls
   Network                                                                                                                                              Next Hop             AS_PATH              Age        Attrs
*> NLRI { SRv6SID { LOCAL_NODE: {ASN: 65000, BGP LS ID: 0, BGP ROUTER ID: 192.168.255.1} SRv6_SID: {SIDs: fd00::1} MULTI_TOPO_IDs: {MultiTopoIDs: 1}} } 0.0.0.0                                   00:00:08   [{Origin: ?}]

[watal]

I removed the markdownlint errors and renamed lib-ls.md to bgp-ls.md in the ci.yml.

[watal]

@fujita fix the embedded workflow error, the following was done:

• Updated build_embedded_go.py:
  • 1. Added a flag to target only Go snippets in markdown.
  • 2. Added validation for multiple Go snippets.
  • 3. Added an error for missing Go snippets.
• Corrected the typo from "embeded" to "embedded."

[fujita]

Thanks!