1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright(c) 2017 Intel Corporation 3 */ 4 5 #ifndef _GSO_TUNNEL_TCP4_H_ 6 #define _GSO_TUNNEL_TCP4_H_ 7 8 #include <stdint.h> 9 #include <rte_mbuf.h> 10 11 /** 12 * Segment a tunneling packet with inner TCP/IPv4 headers. This function 13 * doesn't check if the input packet has correct checksums, and doesn't 14 * update checksums for output GSO segments. Furthermore, it doesn't 15 * process IP fragment packets. 16 * 17 * @param pkt 18 * The packet mbuf to segment. 19 * @param gso_size 20 * The max length of a GSO segment, measured in bytes. 21 * @param ipid_delta 22 * The increasing unit of IP ids. 23 * @param direct_pool 24 * MBUF pool used for allocating direct buffers for output segments. 25 * @param indirect_pool 26 * MBUF pool used for allocating indirect buffers for output segments. 27 * @param pkts_out 28 * Pointer array used to store the MBUF addresses of output GSO 29 * segments, when it succeeds. If the memory space in pkts_out is 30 * insufficient, it fails and returns -EINVAL. 31 * @param nb_pkts_out 32 * The max number of items that 'pkts_out' can keep. 33 * 34 * @return 35 * - The number of GSO segments filled in pkts_out on success. 36 * - Return -ENOMEM if run out of memory in MBUF pools. 37 * - Return -EINVAL for invalid parameters. 38 */ 39 int gso_tunnel_tcp4_segment(struct rte_mbuf *pkt, 40 uint16_t gso_size, 41 uint8_t ipid_delta, 42 struct rte_mempool *direct_pool, 43 struct rte_mempool *indirect_pool, 44 struct rte_mbuf **pkts_out, 45 uint16_t nb_pkts_out); 46 #endif 47