* bgpd.[ch], bgp_vty.c, bgp_route.c: "Restart session after

	  maximum-prefix limit" feature support.

	[merge from GNU Zebra]

1 files changed, 135 insertions, 29 deletions

diff --git a/bgpd/bgp_vty.c b/bgpd/bgp_vty.c
index b94e66b0..02f8e4cf 100644
--- a/bgpd/bgp_vty.c
+++ b/bgpd/bgp_vty.c
@@ -3569,12 +3569,14 @@ DEFUN (no_neighbor_unsuppress_map,
 int
 peer_maximum_prefix_set_vty (struct vty *vty, const char *ip_str, afi_t afi,
 			     safi_t safi, const char *num_str,  
-                             const char *threshold_str, int warning)
+			     const char *threshold_str, int warning,
+			     const char *restart_str)
 {
   int ret;
   struct peer *peer;
   u_int32_t max;
   u_char threshold;
+  u_int16_t restart;
 
   peer = peer_and_group_lookup_vty (vty, ip_str);
   if (! peer)
@@ -3586,7 +3588,12 @@ peer_maximum_prefix_set_vty (struct vty *vty, const char *ip_str, afi_t afi,
   else
     threshold = MAXIMUM_PREFIX_THRESHOLD_DEFAULT;
 
-  ret = peer_maximum_prefix_set (peer, afi, safi, max, threshold, warning);
+  if (restart_str)
+    restart = atoi (restart_str);
+  else
+    restart = 0;
+
+  ret = peer_maximum_prefix_set (peer, afi, safi, max, threshold, warning, restart);
 
   return bgp_vty_return (vty, ret);
 }
@@ -3619,7 +3626,8 @@ DEFUN (neighbor_maximum_prefix,
        "maximum no. of prefix limit\n")
 {
   return peer_maximum_prefix_set_vty (vty, argv[0], bgp_node_afi (vty),
-                                     bgp_node_safi (vty), argv[1], NULL, 0);
+				      bgp_node_safi (vty), argv[1], NULL, 0,
+				      NULL);
 }
 
 DEFUN (neighbor_maximum_prefix_threshold,
@@ -3632,8 +3640,9 @@ DEFUN (neighbor_maximum_prefix_threshold,
        "Threshold value (%) at which to generate a warning msg\n")
 {
   return peer_maximum_prefix_set_vty (vty, argv[0], bgp_node_afi (vty),
-                                     bgp_node_safi (vty), argv[1], argv[2], 0);
- }
+				      bgp_node_safi (vty), argv[1], argv[2], 0,
+				      NULL);
+}
 
 DEFUN (neighbor_maximum_prefix_warning,
        neighbor_maximum_prefix_warning_cmd,
@@ -3645,7 +3654,8 @@ DEFUN (neighbor_maximum_prefix_warning,
        "Only give warning message when limit is exceeded\n")
 {
   return peer_maximum_prefix_set_vty (vty, argv[0], bgp_node_afi (vty),
-                                     bgp_node_safi (vty), argv[1], NULL, 1);
+				      bgp_node_safi (vty), argv[1], NULL, 1,
+				      NULL);
 }
 
 DEFUN (neighbor_maximum_prefix_threshold_warning,
@@ -3659,8 +3669,37 @@ DEFUN (neighbor_maximum_prefix_threshold_warning,
        "Only give warning message when limit is exceeded\n")
 {
   return peer_maximum_prefix_set_vty (vty, argv[0], bgp_node_afi (vty),
-                                     bgp_node_safi (vty), argv[1], argv[2], 1);
- }
+				      bgp_node_safi (vty), argv[1], argv[2], 1, NULL);
+}
+
+DEFUN (neighbor_maximum_prefix_restart,
+       neighbor_maximum_prefix_restart_cmd,
+       NEIGHBOR_CMD2 "maximum-prefix <1-4294967295> restart <1-65535>",
+       NEIGHBOR_STR
+       NEIGHBOR_ADDR_STR2
+       "Maximum number of prefix accept from this peer\n"
+       "maximum no. of prefix limit\n"
+       "Restart bgp connection after limit is exceeded\n"
+       "Restart interval in minutes")
+{
+  return peer_maximum_prefix_set_vty (vty, argv[0], bgp_node_afi (vty),
+				      bgp_node_safi (vty), argv[1], NULL, 0, argv[2]);
+}
+
+DEFUN (neighbor_maximum_prefix_threshold_restart,
+       neighbor_maximum_prefix_threshold_restart_cmd,
+       NEIGHBOR_CMD2 "maximum-prefix <1-4294967295> <1-100> restart <1-65535>",
+       NEIGHBOR_STR
+       NEIGHBOR_ADDR_STR2
+       "Maximum number of prefix accept from this peer\n"
+       "maximum no. of prefix limit\n"
+       "Threshold value (%) at which to generate a warning msg\n"
+       "Restart bgp connection after limit is exceeded\n"
+       "Restart interval in minutes")
+{
+  return peer_maximum_prefix_set_vty (vty, argv[0], bgp_node_afi (vty),
+				      bgp_node_safi (vty), argv[1], argv[2], 0, argv[3]);
+}
 
 DEFUN (no_neighbor_maximum_prefix,
        no_neighbor_maximum_prefix_cmd,
@@ -3684,7 +3723,27 @@ ALIAS (no_neighbor_maximum_prefix,
        "maximum no. of prefix limit\n")
 
 ALIAS (no_neighbor_maximum_prefix,
-       no_neighbor_maximum_prefix_val2_cmd,
+       no_neighbor_maximum_prefix_threshold_cmd,
+       NO_NEIGHBOR_CMD2 "maximum-prefix <1-4294967295> warning-only",
+       NO_STR
+       NEIGHBOR_STR
+       NEIGHBOR_ADDR_STR2
+       "Maximum number of prefix accept from this peer\n"
+       "maximum no. of prefix limit\n"
+       "Threshold value (%) at which to generate a warning msg\n")
+
+ALIAS (no_neighbor_maximum_prefix,
+       no_neighbor_maximum_prefix_warning_cmd,
+       NO_NEIGHBOR_CMD2 "maximum-prefix <1-4294967295> warning-only",
+       NO_STR
+       NEIGHBOR_STR
+       NEIGHBOR_ADDR_STR2
+       "Maximum number of prefix accept from this peer\n"
+       "maximum no. of prefix limit\n"
+       "Only give warning message when limit is exceeded\n");
+
+ALIAS (no_neighbor_maximum_prefix,
+       no_neighbor_maximum_prefix_threshold_warning_cmd,
        NO_NEIGHBOR_CMD2 "maximum-prefix <1-4294967295> <1-100> warning-only",
        NO_STR
        NEIGHBOR_STR
@@ -3692,17 +3751,30 @@ ALIAS (no_neighbor_maximum_prefix,
        "Maximum number of prefix accept from this peer\n"
        "maximum no. of prefix limit\n"
        "Threshold value (%) at which to generate a warning msg\n"
-       "Only give warning message when limit is exceeded\n")
+       "Only give warning message when limit is exceeded\n");
 
 ALIAS (no_neighbor_maximum_prefix,
-       no_neighbor_maximum_prefix_val3_cmd,
-       NO_NEIGHBOR_CMD2 "maximum-prefix <1-4294967295> warning-only",
+       no_neighbor_maximum_prefix_restart_cmd,
+       NO_NEIGHBOR_CMD2 "maximum-prefix <1-4294967295> restart <1-65535>",
        NO_STR
        NEIGHBOR_STR
        NEIGHBOR_ADDR_STR2
        "Maximum number of prefix accept from this peer\n"
        "maximum no. of prefix limit\n"
-       "Only give warning message when limit is exceeded\n")
+       "Restart bgp connection after limit is exceeded\n"
+       "Restart interval in minutes")
+
+ALIAS (no_neighbor_maximum_prefix,
+       no_neighbor_maximum_prefix_threshold_restart_cmd,
+       NO_NEIGHBOR_CMD2 "maximum-prefix <1-4294967295> <1-100> restart <1-65535>",
+       NO_STR
+       NEIGHBOR_STR
+       NEIGHBOR_ADDR_STR2
+       "Maximum number of prefix accept from this peer\n"
+       "maximum no. of prefix limit\n"
+       "Threshold value (%) at which to generate a warning msg\n"
+       "Restart bgp connection after limit is exceeded\n"
+       "Restart interval in minutes")
 
 /* "neighbor allowas-in" */
 DEFUN (neighbor_allowas_in,
@@ -6860,11 +6932,14 @@ bgp_show_peer_afi (struct vty *vty, struct peer *p, afi_t afi, safi_t safi)
   /* Maximum prefix */
   if (CHECK_FLAG (p->af_flags[afi][safi], PEER_FLAG_MAX_PREFIX))
     {
-      vty_out (vty, "  maximum limit %ld%s%s", p->pmax[afi][safi],
+      vty_out (vty, "  Maximum prefixes allowed %ld%s%s", p->pmax[afi][safi],
 	       CHECK_FLAG (p->af_flags[afi][safi], PEER_FLAG_MAX_PREFIX_WARNING)
-               ? " (warning-only)" : "", VTY_NEWLINE);
-      vty_out (vty, "  Threshold for warning message %d%%%s", p->pmax_threshold [afi][safi],
-              VTY_NEWLINE);
+	       ? " (warning-only)" : "", VTY_NEWLINE);
+      vty_out (vty, "  Threshold for warning message %d%%",
+	       p->pmax_threshold[afi][safi]);
+      if (p->pmax_restart[afi][safi])
+	vty_out (vty, ", restart interval %d min", p->pmax_restart[afi][safi]);
+      vty_out (vty, "%s", VTY_NEWLINE);
     }
 
   vty_out (vty, "%s", VTY_NEWLINE);
@@ -7092,8 +7167,14 @@ bgp_show_peer (struct vty *vty, struct peer *p)
   if (CHECK_FLAG (p->sflags, PEER_STATUS_PREFIX_OVERFLOW))
     {
       vty_out (vty, "  Peer had exceeded the max. no. of prefixes configured.%s", VTY_NEWLINE);
-      vty_out (vty, "  Reduce the no. of prefix and clear ip bgp %s to restore peering%s",
-	       p->host, VTY_NEWLINE);
+
+      if (p->t_pmax_restart)
+	vty_out (vty, "  Reduce the no. of prefix from %s, will restart in %ld seconds%s",
+		 p->host, thread_timer_remain_second (p->t_pmax_restart),
+		 VTY_NEWLINE);
+      else
+	vty_out (vty, "  Reduce the no. of prefix and clear ip bgp %s to restore peering%s",
+		 p->host, VTY_NEWLINE);
     }
 
   /* EBGP Multihop */
@@ -8923,42 +9004,67 @@ bgp_vty_init ()
   install_element (BGP_NODE, &neighbor_maximum_prefix_threshold_cmd);
   install_element (BGP_NODE, &neighbor_maximum_prefix_warning_cmd);
   install_element (BGP_NODE, &neighbor_maximum_prefix_threshold_warning_cmd);
+  install_element (BGP_NODE, &neighbor_maximum_prefix_restart_cmd);
+  install_element (BGP_NODE, &neighbor_maximum_prefix_threshold_restart_cmd);
   install_element (BGP_NODE, &no_neighbor_maximum_prefix_cmd);
   install_element (BGP_NODE, &no_neighbor_maximum_prefix_val_cmd);
-  install_element (BGP_NODE, &no_neighbor_maximum_prefix_val2_cmd);
-  install_element (BGP_NODE, &no_neighbor_maximum_prefix_val3_cmd);
+  install_element (BGP_NODE, &no_neighbor_maximum_prefix_threshold_cmd);
+  install_element (BGP_NODE, &no_neighbor_maximum_prefix_warning_cmd);
+  install_element (BGP_NODE, &no_neighbor_maximum_prefix_threshold_warning_cmd);
+  install_element (BGP_NODE, &no_neighbor_maximum_prefix_restart_cmd);
+  install_element (BGP_NODE, &no_neighbor_maximum_prefix_threshold_restart_cmd);
   install_element (BGP_IPV4_NODE, &neighbor_maximum_prefix_cmd);
   install_element (BGP_IPV4_NODE, &neighbor_maximum_prefix_threshold_cmd);
   install_element (BGP_IPV4_NODE, &neighbor_maximum_prefix_warning_cmd);
   install_element (BGP_IPV4_NODE, &neighbor_maximum_prefix_threshold_warning_cmd);
+  install_element (BGP_IPV4_NODE, &neighbor_maximum_prefix_restart_cmd);
+  install_element (BGP_IPV4_NODE, &neighbor_maximum_prefix_threshold_restart_cmd);
   install_element (BGP_IPV4_NODE, &no_neighbor_maximum_prefix_cmd);
   install_element (BGP_IPV4_NODE, &no_neighbor_maximum_prefix_val_cmd);
-  install_element (BGP_IPV4_NODE, &no_neighbor_maximum_prefix_val2_cmd);
-  install_element (BGP_IPV4_NODE, &no_neighbor_maximum_prefix_val3_cmd);
+  install_element (BGP_IPV4_NODE, &no_neighbor_maximum_prefix_threshold_cmd);
+  install_element (BGP_IPV4_NODE, &no_neighbor_maximum_prefix_warning_cmd);
+  install_element (BGP_IPV4_NODE, &no_neighbor_maximum_prefix_threshold_warning_cmd);
+  install_element (BGP_IPV4_NODE, &no_neighbor_maximum_prefix_restart_cmd);
+  install_element (BGP_IPV4_NODE, &no_neighbor_maximum_prefix_threshold_restart_cmd);
   install_element (BGP_IPV4M_NODE, &neighbor_maximum_prefix_cmd);
   install_element (BGP_IPV4M_NODE, &neighbor_maximum_prefix_threshold_cmd);
   install_element (BGP_IPV4M_NODE, &neighbor_maximum_prefix_warning_cmd);
   install_element (BGP_IPV4M_NODE, &neighbor_maximum_prefix_threshold_warning_cmd);
+  install_element (BGP_IPV4M_NODE, &neighbor_maximum_prefix_restart_cmd);
+  install_element (BGP_IPV4M_NODE, &neighbor_maximum_prefix_threshold_restart_cmd);
   install_element (BGP_IPV4M_NODE, &no_neighbor_maximum_prefix_cmd);
   install_element (BGP_IPV4M_NODE, &no_neighbor_maximum_prefix_val_cmd);
-  install_element (BGP_IPV4M_NODE, &no_neighbor_maximum_prefix_val2_cmd);
-  install_element (BGP_IPV4M_NODE, &no_neighbor_maximum_prefix_val3_cmd);
+  install_element (BGP_IPV4M_NODE, &no_neighbor_maximum_prefix_threshold_cmd);
+  install_element (BGP_IPV4M_NODE, &no_neighbor_maximum_prefix_warning_cmd);
+  install_element (BGP_IPV4M_NODE, &no_neighbor_maximum_prefix_threshold_warning_cmd);
+  install_element (BGP_IPV4M_NODE, &no_neighbor_maximum_prefix_restart_cmd);
+  install_element (BGP_IPV4M_NODE, &no_neighbor_maximum_prefix_threshold_restart_cmd);
   install_element (BGP_IPV6_NODE, &neighbor_maximum_prefix_cmd);
   install_element (BGP_IPV6_NODE, &neighbor_maximum_prefix_threshold_cmd);
   install_element (BGP_IPV6_NODE, &neighbor_maximum_prefix_warning_cmd);
   install_element (BGP_IPV6_NODE, &neighbor_maximum_prefix_threshold_warning_cmd);
+  install_element (BGP_IPV6_NODE, &neighbor_maximum_prefix_restart_cmd);
+  install_element (BGP_IPV6_NODE, &neighbor_maximum_prefix_threshold_restart_cmd);
   install_element (BGP_IPV6_NODE, &no_neighbor_maximum_prefix_cmd);
   install_element (BGP_IPV6_NODE, &no_neighbor_maximum_prefix_val_cmd);
-  install_element (BGP_IPV6_NODE, &no_neighbor_maximum_prefix_val2_cmd);
-  install_element (BGP_IPV6_NODE, &no_neighbor_maximum_prefix_val3_cmd);
+  install_element (BGP_IPV6_NODE, &no_neighbor_maximum_prefix_threshold_cmd);
+  install_element (BGP_IPV6_NODE, &no_neighbor_maximum_prefix_warning_cmd);
+  install_element (BGP_IPV6_NODE, &no_neighbor_maximum_prefix_threshold_warning_cmd);
+  install_element (BGP_IPV6_NODE, &no_neighbor_maximum_prefix_restart_cmd);
+  install_element (BGP_IPV6_NODE, &no_neighbor_maximum_prefix_threshold_restart_cmd);
   install_element (BGP_VPNV4_NODE, &neighbor_maximum_prefix_cmd);
   install_element (BGP_VPNV4_NODE, &neighbor_maximum_prefix_threshold_cmd);
   install_element (BGP_VPNV4_NODE, &neighbor_maximum_prefix_warning_cmd);
   install_element (BGP_VPNV4_NODE, &neighbor_maximum_prefix_threshold_warning_cmd);
+  install_element (BGP_VPNV4_NODE, &neighbor_maximum_prefix_restart_cmd);
+  install_element (BGP_VPNV4_NODE, &neighbor_maximum_prefix_threshold_restart_cmd);
   install_element (BGP_VPNV4_NODE, &no_neighbor_maximum_prefix_cmd);
   install_element (BGP_VPNV4_NODE, &no_neighbor_maximum_prefix_val_cmd);
-  install_element (BGP_VPNV4_NODE, &no_neighbor_maximum_prefix_val2_cmd);
-  install_element (BGP_VPNV4_NODE, &no_neighbor_maximum_prefix_val3_cmd);
+  install_element (BGP_VPNV4_NODE, &no_neighbor_maximum_prefix_threshold_cmd);
+  install_element (BGP_VPNV4_NODE, &no_neighbor_maximum_prefix_warning_cmd);
+  install_element (BGP_VPNV4_NODE, &no_neighbor_maximum_prefix_threshold_warning_cmd);
+  install_element (BGP_VPNV4_NODE, &no_neighbor_maximum_prefix_restart_cmd);
+  install_element (BGP_VPNV4_NODE, &no_neighbor_maximum_prefix_threshold_restart_cmd);
 
   /* "neighbor allowas-in" */
   install_element (BGP_NODE, &neighbor_allowas_in_cmd);