isisd: Add support for RFC6119 (IPv6 TE in IS-IS)

 - Add advertisement of Global IPv6 address in IIH pdu
 - Add new CLI to set IPv6 Router ID
 - Add advertisement of IPv6 Router ID
 - Correctly advertise IPv6 local and neighbor addresses in Extended IS and MT
   Reachability TLVs
 - Correct output of Neighbor IPv6 address in 'show isis database detail'
 - Manage IPv6 addresses advertisement and corresponiding Adjacency SID when
   IS-IS is not using Multi-Topology by introducing a new ISIS_MT_DISABLE
   value for mtid (== 4096 i.e. first reserved flag set to 1)

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

1 files changed, 39 insertions, 0 deletions

diff --git a/isisd/isis_cli.c b/isisd/isis_cli.c
index bf03d0a050..b6f798bb25 100644
--- a/isisd/isis_cli.c
+++ b/isisd/isis_cli.c
@@ -1140,6 +1140,43 @@ void cli_show_isis_mpls_te_router_addr(struct vty *vty,
 		yang_dnode_get_string(dnode, NULL));
 }
 
+/*
+ * XPath: /frr-isisd:isis/instance/mpls-te/router-address-v6
+ */
+DEFPY_YANG(isis_mpls_te_router_addr_v6, isis_mpls_te_router_addr_v6_cmd,
+      "mpls-te router-address ipv6 X:X::X:X",
+      MPLS_TE_STR
+      "Stable IP address of the advertising router\n"
+      "IPv6 address\n"
+      "MPLS-TE router address in IPv6 address format\n")
+{
+	nb_cli_enqueue_change(vty, "./mpls-te/router-address-v6", NB_OP_MODIFY,
+			      ipv6_str);
+
+	return nb_cli_apply_changes(vty, NULL);
+}
+
+DEFPY_YANG(no_isis_mpls_te_router_addr_v6, no_isis_mpls_te_router_addr_v6_cmd,
+      "no mpls-te router-address ipv6 [X:X::X:X]",
+      NO_STR MPLS_TE_STR
+      "Delete IP address of the advertising router\n"
+      "IPv6 address\n"
+      "MPLS-TE router address in IPv6 address format\n")
+{
+	nb_cli_enqueue_change(vty, "./mpls-te/router-address-v6", NB_OP_DESTROY,
+			      NULL);
+
+	return nb_cli_apply_changes(vty, NULL);
+}
+
+void cli_show_isis_mpls_te_router_addr_ipv6(struct vty *vty,
+					    const struct lyd_node *dnode,
+					    bool show_defaults)
+{
+	vty_out(vty, " mpls-te router-address ipv6 %s\n",
+		yang_dnode_get_string(dnode, NULL));
+}
+
 DEFPY_YANG(isis_mpls_te_inter_as, isis_mpls_te_inter_as_cmd,
       "[no] mpls-te inter-as [level-1|level-1-2|level-2-only]",
       NO_STR MPLS_TE_STR
@@ -3125,6 +3162,8 @@ void isis_cli_init(void)
 	install_element(ISIS_NODE, &no_isis_mpls_te_on_cmd);
 	install_element(ISIS_NODE, &isis_mpls_te_router_addr_cmd);
 	install_element(ISIS_NODE, &no_isis_mpls_te_router_addr_cmd);
+	install_element(ISIS_NODE, &isis_mpls_te_router_addr_v6_cmd);
+	install_element(ISIS_NODE, &no_isis_mpls_te_router_addr_v6_cmd);
 	install_element(ISIS_NODE, &isis_mpls_te_inter_as_cmd);
 
 	install_element(ISIS_NODE, &isis_default_originate_cmd);