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/*
* Copyright (c) 2021 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.
*/
#ifndef __HICN_PG_H__
#define __HICN_PG_H__
/**
* @file pg.h
*
* The packet generator is made of two entities, a client and a server.
* The client issues interests at high speed and the server satisfy each
* interest it receives with the corresponding data.
* The packet generator is made of three nodes:
* - hicnpg-interest that receives packets from a packet generator interface
* and manipulate them to generate interests based on the given
* configuration. This node runs at the client side.
* - hicnpg-data that receives data packets at the client side and counts them.
* This is useful for statistics. The "show err" command will give the number
* of interest issued and data received at the client side
* - hicnpg-server that recevies and interest and replies with the
* corresponding data. The data is generated from the interest switching the
* src and destination address in the packet and appending a payload to the
* packet.
*
*
* These three nodes are inserted in the vlib graph in the following manner:
* - hicnpg-interest is added as a possible next node of the pg-input node. The
* packet generator stream then specifies it as next node.
* - hicnpg-data is added as next hop of the ip4/6-unicast node exploiting the
* corresponding feature and it runs before the ip4/6-inacl node. In this way,
* every packet that is received through an interface on which this feature is
* enabled is sent to this node.
* - hicnpg-server is added as next hop of the ip4/6-unicast using the
* corresponding feature and it runs before the ip4/6-inacl node. In this way,
* every packet that is received through an interface on which this feature is
* enabled is sent to this node.
*
* An example of how to use the pg for hicn is available in the documentation.
*/
/**
* @brief hICN packet generator main for the pg client nodes
*
* It stores the configuration and make it availables to the pg client nodes.
*/
typedef struct hicnpg_main_s
{
u32 index; // used to compute the sequence number
fib_prefix_t *pgen_clt_hicn_name; // hICN name to put in the destiantion
// addess of an interest
u32
index_ifaces; /* used to mimic interests coming from different consumer */
u32 n_ifaces; /* The source address will change from interest to interest */
/* index_ifaces is used to keep a global reference to the iface used */
/* and it is incremented when we want to change "consumer" */
/* n_ifaces identifies how many consumers to simulate */
u32 max_seq_number; // Use to limit the max sequence number
u32 n_flows; // Use to simulate multiple flows (a flow always have the same
// hICN name)
ip46_address_t pgen_clt_src_addr; // Source addess base to use in the
// interest
u16 interest_lifetime; // Interest lifetime
u32 sw_if; // Interface where to send interest and receives data
} hicnpg_main_t;
extern hicnpg_main_t hicnpg_main;
/**
* @brief hICN packet generator main for the pg server node
*
* It stores the configuration and make it availables to the pg server node.
*/
typedef struct hicnpg_server_main_s
{
u32 node_index;
/* Arbitrary content */
u32 pgen_svr_buffer_idx;
fib_prefix_t *pgen_srv_hicn_name;
} hicnpg_server_main_t;
extern hicnpg_server_main_t hicnpg_server_main;
extern vlib_node_registration_t hicn_pg_interest_node;
extern vlib_node_registration_t hicn_pg_data_node;
#endif // __HICN_PG_H__
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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