bgpd: add flowspec feature

This work is derived from a work done by China-Telecom.
That initial work can be found in [0].
As the gap between frr and quagga is important, a reworks has been
done in the meantime.
The initial work consists of bringing the following:
- Bringing the client side of flowspec.
- the enhancement of address-family ipv4/ipv6 flowspec
- partial data path handling at reception has been prepared
- the support for ipv4 flowspec or ipv6 flowspec in BGP open messages,
  and the internals of BGP has been done.
- the memory contexts necessary for flowspec has been provisioned

In addition to this work, the following has been done:
- the complement of adaptation for FS safi in bgp code
- the code checkstyle has been reworked so as to match frr checkstyle
- the processing of IPv6 FS NLRI is prevented
- the processing of FS NLRI is stopped ( temporary)

[0] https://github.com/chinatelecom-sdn-group/quagga_flowspec/

Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
Signed-off-by: jaydom <chinatelecom-sdn-group@github.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/lib/prefix.c b/lib/prefix.c
index 515b4dcb5e..ed55fac883 100644
--- a/lib/prefix.c
+++ b/lib/prefix.c
@@ -523,6 +523,8 @@ const char *safi2str(safi_t safi)
 		return "evpn";
 	case SAFI_LABELED_UNICAST:
 		return "labeled-unicast";
+	case SAFI_FLOWSPEC:
+		return "flowspec";
 	default:
 		return "unknown";
 	}