zebra: static label binding

Implement static label binding of a label to a prefix (FEC).

Note: Currently, only binding to a prefix is supported, the nexthop and/or
other parameters are not considered.  This was cherry-picked by hand from
an earlier mpls branch.

Signed-off-by: Don Slice <dslice@cumulusnetworks.com>

1 files changed, 133 insertions, 0 deletions

diff --git a/zebra/zebra_mpls_vty.c b/zebra/zebra_mpls_vty.c
index dd381723c5..90624c12a4 100644
--- a/zebra/zebra_mpls_vty.c
+++ b/zebra/zebra_mpls_vty.c
@@ -209,6 +209,101 @@ DEFUN (no_mpls_transit_lsp_all,
   return zebra_mpls_transit_lsp (vty, 0, argv[3]->arg, NULL, NULL, NULL);
 }
 
+static int
+zebra_mpls_bind (struct vty *vty, int add_cmd, const char *prefix,
+                const char *label_str)
+{
+  struct zebra_vrf *zvrf;
+  struct prefix p;
+  u_int32_t label;
+  int ret;
+
+  zvrf = vrf_info_lookup(VRF_DEFAULT);
+  if (!zvrf)
+    {
+      vty_out (vty, "%% Default VRF does not exist%s", VTY_NEWLINE);
+      return CMD_WARNING;
+    }
+
+  memset(&p, 0, sizeof(struct prefix));
+  ret = str2prefix(prefix, &p);
+  if (ret <= 0)
+    {
+      vty_out (vty, "%% Malformed address%s", VTY_NEWLINE);
+      return CMD_WARNING;
+    }
+
+  if (add_cmd)
+    {
+      if (!label_str)
+        {
+          vty_out (vty, "%% No label binding specified%s", VTY_NEWLINE);
+          return CMD_WARNING;
+        }
+
+      if (!strcmp(label_str, "implicit-null"))
+        label = MPLS_IMP_NULL_LABEL;
+      else
+        {
+          label = atoi(label_str);
+          if (!IS_MPLS_UNRESERVED_LABEL(label))
+            {
+              vty_out (vty, "%% Invalid label%s", VTY_NEWLINE);
+              return CMD_WARNING;
+            }
+          if (zebra_mpls_label_already_bound (zvrf, label))
+            {
+              vty_out (vty, "%% Label already bound to a FEC%s",
+                       VTY_NEWLINE);
+              return CMD_WARNING;
+            }
+        }
+
+      ret = zebra_mpls_static_fec_add (zvrf, &p, label);
+    }
+  else
+    ret = zebra_mpls_static_fec_del (zvrf, &p);
+
+  if (ret)
+    {
+      vty_out (vty, "%% FEC to label binding cannot be %s%s",
+               add_cmd ? "added" : "deleted", VTY_NEWLINE);
+      return CMD_WARNING;
+    }
+
+  return CMD_SUCCESS;
+}
+
+DEFUN (mpls_label_bind,
+       mpls_label_bind_cmd,
+       "mpls label bind <A.B.C.D/M|X:X::X:X/M> <(16-1048575)|implicit-null>",
+       MPLS_STR
+       "Label configuration\n"
+       "Establish FEC to label binding\n"
+       "IPv4 prefix\n"
+       "IPv6 prefix\n"
+       "MPLS Label to bind\n"
+       "Use Implicit-Null Label\n")
+{
+  return zebra_mpls_bind (vty, 1, argv[3]->arg, argv[4]->arg);
+}
+
+DEFUN (no_mpls_label_bind,
+       no_mpls_label_bind_cmd,
+       "no mpls label bind <A.B.C.D/M|X:X::X:X/M> [<(16-1048575)|implicit-null>]",
+       NO_STR
+       MPLS_STR
+       "Label configuration\n"
+       "Establish FEC to label binding\n"
+       "IPv4 prefix\n"
+       "IPv6 prefix\n"
+       "MPLS Label to bind\n"
+       "Use Implicit-Null Label\n")
+
+{
+  return zebra_mpls_bind (vty, 0, argv[4]->arg, NULL);
+}
+
 /* Static route configuration.  */
 DEFUN (ip_route_label,
        ip_route_label_cmd,
@@ -777,9 +872,44 @@ zebra_mpls_config (struct vty *vty)
     return 0;
 
   write += zebra_mpls_write_lsp_config(vty, zvrf);
+  write += zebra_mpls_write_fec_config(vty, zvrf);
   return write;
 }
 
+DEFUN (show_mpls_fec,
+       show_mpls_fec_cmd,
+       "show mpls fec [<A.B.C.D/M|X:X::X:X/M>]",
+       SHOW_STR
+       MPLS_STR
+       "MPLS FEC table\n"
+       "FEC to display information about\n"
+       "FEC to display information about\n")
+{
+  struct zebra_vrf *zvrf;
+  struct prefix p;
+  int ret;
+
+  zvrf = vrf_info_lookup(VRF_DEFAULT);
+    if (!zvrf)
+      return 0;
+
+  if (argc == 3)
+    zebra_mpls_print_fec_table(vty, zvrf);
+  else
+    {
+      memset(&p, 0, sizeof(struct prefix));
+      ret = str2prefix(argv[3]->arg, &p);
+      if (ret <= 0)
+        {
+          vty_out (vty, "%% Malformed address%s", VTY_NEWLINE);
+          return CMD_WARNING;
+        }
+      zebra_mpls_print_fec (vty, zvrf, &p);
+    }
+
+  return CMD_SUCCESS;
+}
+
 DEFUN (show_mpls_table,
        show_mpls_table_cmd,
        "show mpls table [json]",
@@ -876,7 +1006,10 @@ zebra_mpls_vty_init (void)
   install_element (CONFIG_NODE, &no_mpls_transit_lsp_cmd);
   install_element (CONFIG_NODE, &no_mpls_transit_lsp_out_label_cmd);
   install_element (CONFIG_NODE, &no_mpls_transit_lsp_all_cmd);
+  install_element (CONFIG_NODE, &mpls_label_bind_cmd);
+  install_element (CONFIG_NODE, &no_mpls_label_bind_cmd);
 
   install_element (VIEW_NODE, &show_mpls_table_cmd);
   install_element (VIEW_NODE, &show_mpls_table_lsp_cmd);
+  install_element (VIEW_NODE, &show_mpls_fec_cmd);
 }