-/*-
- * BSD LICENSE
- *
- * Copyright(c) 2017 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.
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2017 Intel Corporation
*/
#ifndef _RTE_GSO_H_
#include <stdint.h>
#include <rte_mbuf.h>
+/* Minimum GSO segment size for TCP based packets. */
+#define RTE_GSO_SEG_SIZE_MIN (sizeof(struct rte_ether_hdr) + \
+ sizeof(struct rte_ipv4_hdr) + sizeof(struct rte_tcp_hdr) + 1)
+
+/* Minimum GSO segment size for UDP based packets. */
+#define RTE_GSO_UDP_SEG_SIZE_MIN (sizeof(struct rte_ether_hdr) + \
+ sizeof(struct rte_ipv4_hdr) + sizeof(struct rte_udp_hdr) + 1)
+
/* GSO flags for rte_gso_ctx. */
#define RTE_GSO_FLAG_IPID_FIXED (1ULL << 0)
/**< Use fixed IP ids for output GSO segments. Setting
*/
uint16_t gso_size;
/**< maximum size of an output GSO segment, including packet
- * header and payload, measured in bytes.
+ * header and payload, measured in bytes. Must exceed
+ * RTE_GSO_SEG_SIZE_MIN.
*/
};
* Before calling rte_gso_segment(), applications must set proper ol_flags
* for the packet. The GSO library uses the same macros as that of TSO.
* For example, set PKT_TX_TCP_SEG and PKT_TX_IPV4 in ol_flags to segment
- * a TCP/IPv4 packet. If rte_gso_segment() succceds, the PKT_TX_TCP_SEG
+ * a TCP/IPv4 packet. If rte_gso_segment() succeeds, the PKT_TX_TCP_SEG
* flag is removed for all GSO segments and the input packet.
*
* Each of the newly-created GSO segments is organized as a two-segment