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/*-
* BSD LICENSE
*
* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __INCLUDE_RTE_PORT_IP_FRAG_H__
#define __INCLUDE_RTE_PORT_IP_FRAG_H__
#ifdef __cplusplus
extern "C" {
#endif
/**
* @file
* RTE Port for IPv4 Fragmentation
*
* This port is built on top of pre-initialized single consumer rte_ring. In
* order to minimize the amount of packets stored in the ring at any given
* time, the IP fragmentation functionality is executed on ring read operation,
* hence this port is implemented as an input port. A regular ring_writer port
* can be created to write to the same ring.
*
* The packets written to the ring are either complete IP datagrams or jumbo
* frames (i.e. IP packets with length bigger than provided MTU value). The
* packets read from the ring are all non-jumbo frames. The complete IP
* datagrams written to the ring are not changed. The jumbo frames are
* fragmented into several IP packets with length less or equal to MTU.
*
***/
#include <stdint.h>
#include <rte_ring.h>
#include "rte_port.h"
/** ring_reader_ipv4_frag port parameters */
struct rte_port_ring_reader_ipv4_frag_params {
/** Underlying single consumer ring that has to be pre-initialized. */
struct rte_ring *ring;
/** Maximum Transfer Unit (MTU). Maximum IP packet size (in bytes). */
uint32_t mtu;
/** Size of application dependent meta-data stored per each input packet
that has to be copied to each of the fragments originating from the
same input IP datagram. */
uint32_t metadata_size;
/** Pre-initialized buffer pool used for allocating direct buffers for
the output fragments. */
struct rte_mempool *pool_direct;
/** Pre-initialized buffer pool used for allocating indirect buffers for
the output fragments. */
struct rte_mempool *pool_indirect;
};
/** ring_reader_ipv4_frag port operations */
extern struct rte_port_in_ops rte_port_ring_reader_ipv4_frag_ops;
#ifdef __cplusplus
}
#endif
#endif
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