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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2017 Intel Corporation
*/
#ifndef _GSO_TCP4_H_
#define _GSO_TCP4_H_
#include <stdint.h>
#include <rte_mbuf.h>
/**
* Segment an IPv4/TCP packet. This function doesn't check if the input
* packet has correct checksums, and doesn't update checksums for output
* GSO segments. Furthermore, it doesn't process IP fragment packets.
*
* @param pkt
* The packet mbuf to segment.
* @param gso_size
* The max length of a GSO segment, measured in bytes.
* @param ipid_delta
* The increasing unit of IP ids.
* @param direct_pool
* MBUF pool used for allocating direct buffers for output segments.
* @param indirect_pool
* MBUF pool used for allocating indirect buffers for output segments.
* @param pkts_out
* Pointer array used to store the MBUF addresses of output GSO
* segments, when the function succeeds. If the memory space in
* pkts_out is insufficient, it fails and returns -EINVAL.
* @param nb_pkts_out
* The max number of items that 'pkts_out' can keep.
*
* @return
* - The number of GSO segments filled in pkts_out on success.
* - Return -ENOMEM if run out of memory in MBUF pools.
* - Return -EINVAL for invalid parameters.
*/
int gso_tcp4_segment(struct rte_mbuf *pkt,
uint16_t gso_size,
uint8_t ip_delta,
struct rte_mempool *direct_pool,
struct rte_mempool *indirect_pool,
struct rte_mbuf **pkts_out,
uint16_t nb_pkts_out);
#endif
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