1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright(c) 2017 Intel Corporation 3 */ 4 5 #ifndef _GSO_TCP4_H_ 6 #define _GSO_TCP4_H_ 7 8 #include <stdint.h> 9 10 /** 11 * Segment an IPv4/TCP packet. This function doesn't check if the input 12 * packet has correct checksums, and doesn't update checksums for output 13 * GSO segments. Furthermore, it doesn't process IP fragment packets. 14 * 15 * @param pkt 16 * The packet mbuf to segment. 17 * @param gso_size 18 * The max length of a GSO segment, measured in bytes. 19 * @param ipid_delta 20 * The increasing unit of IP ids. 21 * @param direct_pool 22 * MBUF pool used for allocating direct buffers for output segments. 23 * @param indirect_pool 24 * MBUF pool used for allocating indirect buffers for output segments. 25 * @param pkts_out 26 * Pointer array used to store the MBUF addresses of output GSO 27 * segments, when the function succeeds. If the memory space in 28 * pkts_out is insufficient, it fails and returns -EINVAL. 29 * @param nb_pkts_out 30 * The max number of items that 'pkts_out' can keep. 31 * 32 * @return 33 * - The number of GSO segments filled in pkts_out on success. 34 * - Return -ENOMEM if run out of memory in MBUF pools. 35 * - Return -EINVAL for invalid parameters. 36 */ 37 int gso_tcp4_segment(struct rte_mbuf *pkt, 38 uint16_t gso_size, 39 uint8_t ip_delta, 40 struct rte_mempool *direct_pool, 41 struct rte_mempool *indirect_pool, 42 struct rte_mbuf **pkts_out, 43 uint16_t nb_pkts_out); 44 #endif 45