OSPFD: Add Experimental Segment Routing support

This is an implementation of draft-ietf-ospf-segment-routing-extensions-24
and RFC7684 for Extended Link & Prefix Opaque LSA.
Look to doc/OSPF_SR.rst for implementation details & known limitations.

New files:

 - ospfd/ospf_sr.h: Segment Routing structure definition (SubTLVs + SRDB)
 - ospfd/ospf_sr.c: Main functions for Segment Routing support
 - ospfd/ospf_ext.h: TLVs and SubTLVs definition for RFC7684
 - ospfd/ospf_ext.c: RFC7684 Extended Link / Prefix implementation
 - doc/OSPF-SRr.rst: Documentation

Modified Files:

 - doc/ospfd.texi: Add new Segment Routing CLI command definition
 - lib/command.h: Add new string command for Segment Routing CLI
 - lib/mpls.h: Add default value for SRGB
 - lib/route_types.txt: Add new OSPF Segment Routing route type
 - ospfd/ospf_dump.[c,h]: Add OSPF SR debug
 - ospfd/ospf_memory.[c,h]: Add new Segment Routing memory type
 - ospfd/ospf_opaque.[c,h]: Add ospf_sr_init() starting function
 - ospfd/ospf_ri.c: Add new functions to Set/Get Segment Routing TLVs
Add new ospf_router_info_lsa_upadte() to send Opaque LSA to ospf_sr.c()
 - ospfd/ospf_ri.h: Add new Router Information SR SubTLVs
 - ospfd/ospf_spf.c: Add new scheduler when running SPF to trigger
update of NHLFE
 - ospfd/ospfd.h: Add new thread for Segment Routing scheduler
 - ospfd/subdir.am: Add new files
 - vtysh/Makefile.am: Add new ospf_sr.c file for vtysh
 - zebra/kernel_netlink.c: Add new OSPF_SR route type
 - zebra/rt_netlink.[c,h]: Add new OSPF_SR route type
 - zebra/zebra_mpls.h: Add new OSPF_SR route type

Signed-off-by: Olivier Dugeon <olivier.dugeon@orange.com>

1 files changed, 22 insertions, 3 deletions

diff --git a/ospfd/ospf_opaque.c b/ospfd/ospf_opaque.c
index 6f9da9254..292d5e818 100644
--- a/ospfd/ospf_opaque.c
+++ b/ospfd/ospf_opaque.c
@@ -50,6 +50,10 @@
 #include "ospfd/ospf_route.h"
 #include "ospfd/ospf_ase.h"
 #include "ospfd/ospf_zebra.h"
+#include "ospfd/ospf_te.h"
+#include "ospfd/ospf_sr.h"
+#include "ospfd/ospf_ri.h"
+#include "ospfd/ospf_ext.h"
 
 DEFINE_MTYPE_STATIC(OSPFD, OSPF_OPAQUE_FUNCTAB, "OSPF opaque function table")
 DEFINE_MTYPE_STATIC(OSPFD, OPAQUE_INFO_PER_TYPE, "OSPF opaque per-type info")
@@ -59,9 +63,6 @@ DEFINE_MTYPE_STATIC(OSPFD, OPAQUE_INFO_PER_ID, "OSPF opaque per-ID info")
  * Followings are initialize/terminate functions for Opaque-LSAs handling.
  *------------------------------------------------------------------------*/
 
-#include "ospfd/ospf_te.h"
-#include "ospfd/ospf_ri.h"
-
 #ifdef SUPPORT_OSPF_API
 int ospf_apiserver_init(void);
 void ospf_apiserver_term(void);
@@ -85,9 +86,17 @@ void ospf_opaque_init(void)
 	if (ospf_mpls_te_init() != 0)
 		exit(1);
 
+	/* Segment Routing init */
+	if (ospf_sr_init() != 0)
+		exit(1);
+
 	if (ospf_router_info_init() != 0)
 		exit(1);
 
+	/* Force Extended Prefix/Link to Type 10 */
+	if (ospf_ext_init() != 0)
+		exit(1);
+
 #ifdef SUPPORT_OSPF_API
 	if ((ospf_apiserver_enable) && (ospf_apiserver_init() != 0))
 		exit(1);
@@ -102,6 +111,10 @@ void ospf_opaque_term(void)
 
 	ospf_router_info_term();
 
+	ospf_ext_term();
+
+	ospf_sr_term();
+
 #ifdef SUPPORT_OSPF_API
 	ospf_apiserver_term();
 #endif /* SUPPORT_OSPF_API */
@@ -209,6 +222,12 @@ static const char *ospf_opaque_type_name(u_char opaque_type)
 	case OPAQUE_TYPE_ROUTER_INFORMATION_LSA:
 		name = "Router Information LSA";
 		break;
+	case OPAQUE_TYPE_EXTENDED_PREFIX_LSA:
+		name = "Extended Prefix Opaque LSA";
+		break;
+	case OPAQUE_TYPE_EXTENDED_LINK_LSA:
+		name = "Extended Link Opaque LSA";
+		break;
 	default:
 		if (OPAQUE_TYPE_RANGE_UNASSIGNED(opaque_type))
 			name = "Unassigned";