From 7cd468a3d7dee7d6c92f69a0bb7061ae208ec727 Mon Sep 17 00:00:00 2001 From: Damjan Marion Date: Mon, 19 Dec 2016 23:05:39 +0100 Subject: Reorganize source tree to use single autotools instance Change-Id: I7b51f88292e057c6443b12224486f2d0c9f8ae23 Signed-off-by: Damjan Marion --- src/vnet/dpo/ip_null_dpo.h | 56 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 src/vnet/dpo/ip_null_dpo.h (limited to 'src/vnet/dpo/ip_null_dpo.h') diff --git a/src/vnet/dpo/ip_null_dpo.h b/src/vnet/dpo/ip_null_dpo.h new file mode 100644 index 00000000..002a2a70 --- /dev/null +++ b/src/vnet/dpo/ip_null_dpo.h @@ -0,0 +1,56 @@ +/* + * Copyright (c) 2016 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +/** + * @brief + * The IP NULL DPO represents the rubbish bin for IP traffic. Without specifying an + * action (i.e. send IMCP type X to sender) it is equivalent to using a drop DPO. + * However, in contrast to the drop DPO any route that resovles via a NULL, is + * considered to 'resolved' by FIB, i.e. a IP NULL is used when the control plane + * is explicitly expressing the desire to drop packets. Drop DPOs are used + * internally by FIB when resolution is not possible. + * + * Any replies to sender are rate limited. + */ + +#ifndef __IP_NULL_DPO_H__ +#define __IP_NULL_DPO_H__ + +#include + +/** + * @brief Actions to take when a packet encounters the NULL DPO + */ +typedef enum ip_null_dpo_action_t_ +{ + IP_NULL_ACTION_NONE, + IP_NULL_ACTION_SEND_ICMP_UNREACH, + IP_NULL_ACTION_SEND_ICMP_PROHIBIT, +} ip_null_dpo_action_t; + +#define IP_NULL_ACTIONS { \ + [IP_NULL_ACTION_NONE] = "discard", \ + [IP_NULL_ACTION_SEND_ICMP_UNREACH] = "send-unreachable", \ + [IP_NULL_ACTION_SEND_ICMP_PROHIBIT] = "send-prohibited", \ +} + +#define IP_NULL_DPO_ACTION_NUM (IP_NULL_ACTION_SEND_ICMP_PROHIBIT+1) + +extern void ip_null_dpo_add_and_lock (dpo_proto_t proto, + ip_null_dpo_action_t action, + dpo_id_t *dpo); + +extern void ip_null_dpo_module_init(void); + +#endif -- cgit 1.2.3-korg