bgpd, lib: support for flow_label flowspec type

in ipv6 flowspec, a new type is defined to be able to do filtering rules
based on 20 bits flow label field as depicted in [0]. The change include
the decoding by flowspec, and the addition of a new attribute in policy
routing rule, so that the data is ready to be sent to zebra.
The commit also includes a check on fragment option, since dont fragment
bit does not exist in ipv6, the value should always be set to 0,
otherwise the flowspec rule becomes invalid.

[0] https://tools.ietf.org/html/draft-ietf-idr-flow-spec-v6-09

Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/lib/pbr.h b/lib/pbr.h
index fd183d711..53a63122c 100644
--- a/lib/pbr.h
+++ b/lib/pbr.h
@@ -129,6 +129,8 @@ struct pbr_rule {
 #define MATCH_FRAGMENT_INVERSE_SET	(1 << 9)
 #define MATCH_ICMP_SET			(1 << 10)
 #define MATCH_PROTOCOL_SET		(1 << 11)
+#define MATCH_FLOW_LABEL_SET		(1 << 12)
+#define MATCH_FLOW_LABEL_INVERSE_SET	(1 << 13)
 
 extern int zapi_pbr_rule_encode(uint8_t cmd, struct stream *s,
 				struct pbr_rule *zrule);