During SRv6 prefix SID unmarshalling, wrong Path Attribute
length was applied (4B instead of 3B). This was causing
a 1 byte difference in PA length after marshalling & unmarshalling.
Signed-off-by: Rastislav Szabo <rastislav.szabo@isovalent.com>
Fix TEID processing in Type 2 ST Route:
- TEID can be 0-32 bits value as described in I-D.
Accept hex and IPv4 format for TEID in CLI and show TEID as IPv4 format in CLI.
- TEID is generally represented in hexadecimal format.
- IPv4 format is useful because Type 2 ST Route can be used in the longest match algorithm as described in I-D.
https://datatracker.ietf.org/doc/html/draft-abraitis-bgp-version-capability
Working example with FRR
```
% ./gobgp neighbor 192.168.10.124
BGP neighbor is 192.168.10.124, remote AS 65001
BGP version 4, remote router ID 200.200.200.202
BGP state = ESTABLISHED, up for 00:01:14
BGP OutQ = 0, Flops = 0
Hold time is 3, keepalive interval is 1 seconds
Configured hold time is 90, keepalive interval is 30 seconds
Neighbor capabilities:
multiprotocol:
ipv6-unicast: advertised
ipv4-unicast: advertised and received
route-refresh: advertised and received
extended-nexthop: advertised
Local: nlri: ipv4-unicast, nexthop: ipv6
UnknownCapability(6): received
UnknownCapability(9): received
graceful-restart: advertised and received
Local: restart time 10 sec
ipv6-unicast
ipv4-unicast
Remote: restart time 120 sec, notification flag set
ipv4-unicast, forward flag set
4-octet-as: advertised and received
add-path: received
Remote:
ipv4-unicast: receive
enhanced-route-refresh: received
long-lived-graceful-restart: advertised and received
Local:
ipv6-unicast, restart time 10 sec
ipv4-unicast, restart time 20 sec
Remote:
ipv4-unicast, restart time 0 sec, forward flag set
fqdn: advertised and received
Local:
name: donatas-pc, domain:
Remote:
name: spine1-debian-11, domain:
software-version: advertised and received
Local:
GoBGP/3.10.0
Remote:
FRRouting/8.5-dev-MyOwnFRRVersion-gdc92f44a4
cisco-route-refresh: received
Message statistics:
```
FRR side:
```
root@spine1-debian-11:~# vtysh -c 'show bgp neighbor 192.168.10.17 json' | \
> jq '."192.168.10.17".neighborCapabilities.softwareVersion.receivedSoftwareVersion'
"GoBGP/3.10.0"
root@spine1-debian-11:~#
```
Signed-off-by: Donatas Abraitis <donatas@opensourcerouting.org>
- Add TLVType contant values.
- Add NewPathAttributePrefixSID().
- Add SRv6ServiceTLV to support SRv6 L2 Service TLV.
- Move reserved field handling to each type of TLV,
because header and reserved field size are different for each type.
For more details, see https://www.rfc-editor.org/rfc/rfc8669.html
and https://www.rfc-editor.org/rfc/rfc9252.html.
