Add support of Traffic Engineering to IS-IS

These patches is an implementation of RFC5305 that enable the
support of Traffic Engineering in IS-IS

* isisd/Makefile.am: Add new files isis_te.c and isis_te.h
* isisd/isis_circuit.[c,h]: Add new mpls_te_circuit structure to isis_circuit
structure to handle new Traffic Engineering TLVs
* isisd/isis_lsp.c: Update LSP handler to mux/demux Traffic Engineering TLVs
* isisd/isis_main.c: Add initialisation of ISIS TE
* isisd/isis_pdu.c: Update function process_p2p_hello() to retrieve remote IP
address to populate Traffic Engineering TLV.
* isisd/isis_te.[c,]: Implementation of RFC5305
* isisd/isis_tlv.[c,h]: Update TLV definition and function to handle
Traffic Engineering ones
* isisd/isis_zebra.c: Add new function isis_zebra_link_params() to retrieve
the link parameters of interfaces from ZBus to populate the Traffic Engineering
TLVs
* isisd/isisd.[c,h]: Add Traffic Engineering support with new debug command

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

1 files changed, 26 insertions, 0 deletions

diff --git a/isisd/isis_zebra.c b/isisd/isis_zebra.c
index 0e5a7ff3b..569ff70d8 100644
--- a/isisd/isis_zebra.c
+++ b/isisd/isis_zebra.c
@@ -49,6 +49,7 @@
 #include "isisd/isis_lsp.h"
 #include "isisd/isis_route.h"
 #include "isisd/isis_zebra.h"
+#include "isisd/isis_te.h"
 
 struct zclient *zclient = NULL;
 
@@ -61,6 +62,13 @@ isis_router_id_update_zebra (int command, struct zclient *zclient,
   struct listnode *node;
   struct prefix router_id;
 
+  /*
+   * If ISIS TE is enable, TE Router ID is set through specific command.
+   * See mpls_te_router_addr() command in isis_te.c
+   */
+  if (IS_MPLS_TE(isisMplsTE))
+    return 0;
+
   zebra_router_id_update_read (zclient->ibuf, &router_id);
   if (isis->router_id == router_id.u.prefix4.s_addr)
     return 0;
@@ -228,6 +236,23 @@ isis_zebra_if_address_del (int command, struct zclient *client,
   return 0;
 }
 
+static int
+isis_zebra_link_params (int command, struct zclient *zclient,
+                        zebra_size_t length)
+{
+  struct interface *ifp;
+
+  ifp = zebra_interface_link_params_read (zclient->ibuf);
+
+  if (ifp == NULL)
+    return 0;
+
+  /* Update TE TLV */
+  isis_mpls_te_update(ifp);
+
+  return 0;
+}
+
 static void
 isis_zebra_route_add_ipv4 (struct prefix *prefix,
 			   struct isis_route_info *route_info)
@@ -680,6 +705,7 @@ isis_zebra_init (struct thread_master *master)
   zclient->interface_down = isis_zebra_if_state_down;
   zclient->interface_address_add = isis_zebra_if_address_add;
   zclient->interface_address_delete = isis_zebra_if_address_del;
+  zclient->interface_link_params = isis_zebra_link_params;
   zclient->ipv4_route_add = isis_zebra_read_ipv4;
   zclient->ipv4_route_delete = isis_zebra_read_ipv4;
   zclient->redistribute_route_ipv4_add = isis_zebra_read_ipv4;