lib, zebra: Add SR-TE policy infrastructure to zebra

For the sake of Segment Routing (SR) and Traffic Engineering (TE)
Policies there's a need for additional infrastructure within zebra.
The infrastructure in this PR is supposed to manage such policies
in terms of installing binding SIDs and LSPs. Also it is capable of
managing MPLS labels using the label manager, keeping track of
nexthops (for resolving labels) and notifying interested parties about
changes of a policy/LSP state. Further it enables a route map mechanism
for BGP and SR-TE colors such that learned BGP routes can be mapped
onto SR-TE Policies.

This PR does not introduce any usable features by now, it is just
infrastructure for other upcoming PRs which will introduce 'pathd',
a new SR-TE daemon.

Co-authored-by: Renato Westphal <renato@opensourcerouting.org>
Co-authored-by: GalaxyGorilla <sascha@netdef.org>
Signed-off-by: Sebastien Merle <sebastien@netdef.org>

1 files changed, 14 insertions, 0 deletions

diff --git a/lib/ipaddr.h b/lib/ipaddr.h
index aa5b4a3217..730c7ce130 100644
--- a/lib/ipaddr.h
+++ b/lib/ipaddr.h
@@ -25,6 +25,8 @@
 
 #include <zebra.h>
 
+#include "lib/log.h"
+
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -59,6 +61,18 @@ struct ipaddr {
 #define IPADDRSZ(p)                                                            \
 	(IS_IPADDR_V4((p)) ? sizeof(struct in_addr) : sizeof(struct in6_addr))
 
+static inline int ipaddr_family(const struct ipaddr *ip)
+{
+	switch (ip->ipa_type) {
+	case IPADDR_V4:
+		return AF_INET;
+	case IPADDR_V6:
+		return AF_INET6;
+	default:
+		return AF_UNSPEC;
+	}
+}
+
 static inline int str2ipaddr(const char *str, struct ipaddr *ip)
 {
 	int ret;