rte_gso.h

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/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2017 Intel Corporation
 */

#ifndef _RTE_GSO_H_
#define _RTE_GSO_H_

#ifdef __cplusplus
extern "C" {
#endif

#include <stdint.h>
#include <rte_mbuf.h>

/* Minimum GSO segment size for TCP based packets. */
#define RTE_GSO_SEG_SIZE_MIN (sizeof(struct ether_hdr) + \
                sizeof(struct ipv4_hdr) + sizeof(struct tcp_hdr) + 1)

/* Minimum GSO segment size for UDP based packets. */
#define RTE_GSO_UDP_SEG_SIZE_MIN (sizeof(struct ether_hdr) + \
                sizeof(struct ipv4_hdr) + sizeof(struct udp_hdr) + 1)

/* GSO flags for rte_gso_ctx. */
#define RTE_GSO_FLAG_IPID_FIXED (1ULL << 0)

struct rte_gso_ctx {
        struct rte_mempool *direct_pool;
        struct rte_mempool *indirect_pool;
        uint64_t flag;
        uint32_t gso_types;
        uint16_t gso_size;
};

int rte_gso_segment(struct rte_mbuf *pkt,
                const struct rte_gso_ctx *ctx,
                struct rte_mbuf **pkts_out,
                uint16_t nb_pkts_out);
#ifdef __cplusplus
}
#endif

#endif /* _RTE_GSO_H_ */