bgpd: Add RFC9234 implementation

RFC9234 is a way to establish correct connection roles (Customer/
Provider, Peer or with RS) between bgp speakers. This patch:
- Add a new configuration/terminal option to set the appropriate local
role;
- Add a mechanism for checking used roles, implemented by exchanging
the corresponding capabilities in OPEN messages;
- Add strict mode to force other party to use this feature;
- Add basic support for a new transitive optional bgp attribute - OTC
(Only to Customer);
- Add logic for default setting OTC attribute and filtering routes with
this attribute by the edge speakers, if the appropriate conditions are
met;
- Add two test stands to check role negotiation and route filtering
during role usage.

Signed-off-by: Eugene Bogomazov <eb@qrator.net>

1 files changed, 3 insertions, 0 deletions

diff --git a/tests/bgpd/test_capability.py b/tests/bgpd/test_capability.py
index e275195537..da9245bf04 100644
--- a/tests/bgpd/test_capability.py
+++ b/tests/bgpd/test_capability.py
@@ -36,6 +36,9 @@ TestCapability.okfail("ORF-empty: ORF capability, but empty.")
 TestCapability.okfail("AS4-empty: AS4 capability, but empty.")
 TestCapability.okfail("dyn-empty: Dynamic capability, but empty.")
 TestCapability.okfail("dyn-old: Dynamic capability (deprecated version)")
+TestCapability.okfail("Role: Role capability")
+TestCapability.okfail("Role-long: Role capability, but too long")
+TestCapability.okfail("Role-empty: Role capability, but empty.")
 TestCapability.okfail("Cap-singlets: One capability per Optional-Param")
 TestCapability.okfail("Cap-series: Series of capability, one Optional-Param")
 TestCapability.okfail("AS4more: AS4 capability after other caps (singlets)")