[vty] Add support for a 'restricted mode' with anonymous vty connections

	* lib/command.h: Add a RESTRICTED_NODE, intended for use with
	  anonymous, 'no login' vtys, to provide a subset of 'view' mode
	  commands.
	* lib/command.c: Add RESTRICTED_NODE bits, nothing special, just
	  following VIEW_NODE.
	* lib/vty.c: (vty_auth) enable authentication should fall back to
	  restricted/view node as appropriate.
	  (vty_create) init vty's to restricted/view node as appropriate,
	  for the 'no login' case.
	  (vty_{no_,}restricted_mode_cmd) config commands to enable
	  'anonymous restricted' in vty configuration.
	  (vty_config_write) 'anonymous restricted' config.
	  (vty_init) Install some commands to restricted mode, and the
	  'anonymous restricted' config commands into VTY_NODE.
	* bgpd/*.c: Install some of the safe(r) BGP commands into
	  'restricted mode', i.e. lookup commands of non-sensitive data.
	  Useful with looking-glass route-servers.

3 files changed, 96 insertions, 0 deletions

diff --git a/bgpd/bgp_nexthop.c b/bgpd/bgp_nexthop.c
index 4dd5d946..22e48db0 100644
--- a/bgpd/bgp_nexthop.c
+++ b/bgpd/bgp_nexthop.c
@@ -1319,5 +1319,6 @@ bgp_scan_init ()
   install_element (BGP_NODE, &no_bgp_scan_time_cmd);
   install_element (BGP_NODE, &no_bgp_scan_time_val_cmd);
   install_element (VIEW_NODE, &show_ip_bgp_scan_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_scan_cmd);
   install_element (ENABLE_NODE, &show_ip_bgp_scan_cmd);
 }
diff --git a/bgpd/bgp_route.c b/bgpd/bgp_route.c
index 4a642e34..9ff64654 100644
--- a/bgpd/bgp_route.c
+++ b/bgpd/bgp_route.c
@@ -11787,6 +11787,37 @@ bgp_route_init ()
   install_element (VIEW_NODE, &show_ip_bgp_view_rsclient_cmd);
   install_element (VIEW_NODE, &show_ip_bgp_view_rsclient_route_cmd);
   install_element (VIEW_NODE, &show_ip_bgp_view_rsclient_prefix_cmd);
+  
+  /* Restricted node: VIEW_NODE - (set of dangerous commands) */
+  install_element (RESTRICTED_NODE, &show_ip_bgp_route_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_ipv4_route_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_vpnv4_rd_route_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_prefix_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_ipv4_prefix_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_vpnv4_all_prefix_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_vpnv4_rd_prefix_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_view_route_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_view_prefix_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_community_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_community2_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_community3_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_community4_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_ipv4_community_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_ipv4_community2_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_ipv4_community3_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_ipv4_community4_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_community_exact_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_community2_exact_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_community3_exact_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_community4_exact_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_ipv4_community_exact_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_ipv4_community2_exact_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_ipv4_community3_exact_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_ipv4_community4_exact_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_rsclient_route_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_rsclient_prefix_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_view_rsclient_route_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_view_rsclient_prefix_cmd);
 
   install_element (ENABLE_NODE, &show_ip_bgp_cmd);
   install_element (ENABLE_NODE, &show_ip_bgp_ipv4_cmd);
@@ -11971,6 +12002,40 @@ bgp_route_init ()
   install_element (VIEW_NODE, &show_bgp_view_rsclient_cmd);
   install_element (VIEW_NODE, &show_bgp_view_rsclient_route_cmd);
   install_element (VIEW_NODE, &show_bgp_view_rsclient_prefix_cmd);
+  
+  /* Restricted:
+   * VIEW_NODE - (set of dangerous commands) - (commands dependent on prev) 
+   */
+  install_element (RESTRICTED_NODE, &show_bgp_route_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_ipv6_route_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_prefix_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_ipv6_prefix_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_community_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_ipv6_community_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_community2_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_ipv6_community2_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_community3_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_ipv6_community3_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_community4_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_ipv6_community4_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_community_exact_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_ipv6_community_exact_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_community2_exact_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_ipv6_community2_exact_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_community3_exact_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_ipv6_community3_exact_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_community4_exact_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_ipv6_community4_exact_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_rsclient_route_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_rsclient_prefix_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_view_route_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_view_ipv6_route_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_view_prefix_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_view_ipv6_prefix_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_view_neighbor_received_prefix_filter_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_view_ipv6_neighbor_received_prefix_filter_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_view_rsclient_route_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_view_rsclient_prefix_cmd);
 
   install_element (ENABLE_NODE, &show_bgp_cmd);
   install_element (ENABLE_NODE, &show_bgp_ipv6_cmd);
diff --git a/bgpd/bgp_vty.c b/bgpd/bgp_vty.c
index 90867373..9237cb0d 100644
--- a/bgpd/bgp_vty.c
+++ b/bgpd/bgp_vty.c
@@ -9748,6 +9748,18 @@ bgp_vty_init (void)
   install_element (VIEW_NODE, &show_bgp_ipv6_summary_cmd);
   install_element (VIEW_NODE, &show_bgp_instance_ipv6_summary_cmd);
 #endif /* HAVE_IPV6 */
+  install_element (RESTRICTED_NODE, &show_ip_bgp_summary_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_instance_summary_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_ipv4_summary_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_instance_ipv4_summary_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_vpnv4_all_summary_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_vpnv4_rd_summary_cmd);
+#ifdef HAVE_IPV6
+  install_element (RESTRICTED_NODE, &show_bgp_summary_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_instance_summary_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_ipv6_summary_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_instance_ipv6_summary_cmd);
+#endif /* HAVE_IPV6 */
   install_element (ENABLE_NODE, &show_ip_bgp_summary_cmd);
   install_element (ENABLE_NODE, &show_ip_bgp_instance_summary_cmd);
   install_element (ENABLE_NODE, &show_ip_bgp_ipv4_summary_cmd);
@@ -9772,6 +9784,11 @@ bgp_vty_init (void)
   install_element (VIEW_NODE, &show_ip_bgp_vpnv4_rd_neighbors_peer_cmd);
   install_element (VIEW_NODE, &show_ip_bgp_instance_neighbors_cmd);
   install_element (VIEW_NODE, &show_ip_bgp_instance_neighbors_peer_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_neighbors_peer_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_ipv4_neighbors_peer_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_vpnv4_all_neighbors_peer_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_vpnv4_rd_neighbors_peer_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_instance_neighbors_peer_cmd);
   install_element (ENABLE_NODE, &show_ip_bgp_neighbors_cmd);
   install_element (ENABLE_NODE, &show_ip_bgp_ipv4_neighbors_cmd);
   install_element (ENABLE_NODE, &show_ip_bgp_neighbors_peer_cmd);
@@ -9792,6 +9809,10 @@ bgp_vty_init (void)
   install_element (VIEW_NODE, &show_bgp_instance_ipv6_neighbors_cmd);
   install_element (VIEW_NODE, &show_bgp_instance_neighbors_peer_cmd);
   install_element (VIEW_NODE, &show_bgp_instance_ipv6_neighbors_peer_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_neighbors_peer_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_ipv6_neighbors_peer_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_instance_neighbors_peer_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_instance_ipv6_neighbors_peer_cmd);
   install_element (ENABLE_NODE, &show_bgp_neighbors_cmd);
   install_element (ENABLE_NODE, &show_bgp_ipv6_neighbors_cmd);
   install_element (ENABLE_NODE, &show_bgp_neighbors_peer_cmd);
@@ -9813,6 +9834,10 @@ bgp_vty_init (void)
   install_element (VIEW_NODE, &show_ip_bgp_instance_rsclient_summary_cmd);
   install_element (VIEW_NODE, &show_ip_bgp_ipv4_rsclient_summary_cmd);
   install_element (VIEW_NODE, &show_ip_bgp_instance_ipv4_rsclient_summary_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_rsclient_summary_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_instance_rsclient_summary_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_ipv4_rsclient_summary_cmd);
+  install_element (RESTRICTED_NODE, &show_ip_bgp_instance_ipv4_rsclient_summary_cmd);
   install_element (ENABLE_NODE, &show_ip_bgp_rsclient_summary_cmd);
   install_element (ENABLE_NODE, &show_ip_bgp_instance_rsclient_summary_cmd);
   install_element (ENABLE_NODE, &show_ip_bgp_ipv4_rsclient_summary_cmd);
@@ -9823,6 +9848,10 @@ bgp_vty_init (void)
   install_element (VIEW_NODE, &show_bgp_ipv6_rsclient_summary_cmd);
   install_element (VIEW_NODE, &show_bgp_instance_rsclient_summary_cmd);
   install_element (VIEW_NODE, &show_bgp_instance_ipv6_rsclient_summary_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_rsclient_summary_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_ipv6_rsclient_summary_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_instance_rsclient_summary_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_instance_ipv6_rsclient_summary_cmd);
   install_element (ENABLE_NODE, &show_bgp_rsclient_summary_cmd);
   install_element (ENABLE_NODE, &show_bgp_ipv6_rsclient_summary_cmd);
   install_element (ENABLE_NODE, &show_bgp_instance_rsclient_summary_cmd);
@@ -9869,6 +9898,7 @@ bgp_vty_init (void)
 
   /* "show bgp memory" commands. */
   install_element (VIEW_NODE, &show_bgp_memory_cmd);
+  install_element (RESTRICTED_NODE, &show_bgp_memory_cmd);
   install_element (ENABLE_NODE, &show_bgp_memory_cmd);
   
   /* Community-list. */