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/*-
* Copyright (c) 2006, Myricom Inc.
* Copyright (c) 2008, Intel Corporation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* $FreeBSD: release/9.1.0/sys/netinet/tcp_lro.h 238230 2012-07-08 11:24:22Z bz $
*/
#ifndef _TCP_LRO_H_
#define _TCP_LRO_H_
struct lro_entry
{
SLIST_ENTRY(lro_entry) next;
struct mbuf *m_head;
struct mbuf *m_tail;
union {
struct ip *ip4;
struct ip6_hdr *ip6;
} leip;
union {
in_addr_t s_ip4;
struct in6_addr s_ip6;
} lesource;
union {
in_addr_t d_ip4;
struct in6_addr d_ip6;
} ledest;
uint16_t source_port;
uint16_t dest_port;
uint16_t eh_type; /* EthernetHeader type. */
uint16_t append_cnt;
uint32_t p_len; /* IP header payload length. */
uint32_t ulp_csum; /* TCP, etc. checksum. */
uint32_t next_seq; /* tcp_seq */
uint32_t ack_seq; /* tcp_seq */
uint32_t tsval;
uint32_t tsecr;
uint16_t window;
uint16_t timestamp; /* flag, not a TCP hdr field. */
};
SLIST_HEAD(lro_head, lro_entry);
#define le_ip4 leip.ip4
#define le_ip6 leip.ip6
#define source_ip4 lesource.s_ip4
#define dest_ip4 ledest.d_ip4
#define source_ip6 lesource.s_ip6
#define dest_ip6 ledest.d_ip6
/* NB: This is part of driver structs. */
struct lro_ctrl {
struct ifnet *ifp;
int lro_queued;
int lro_flushed;
int lro_bad_csum;
int lro_cnt;
struct lro_head lro_active;
struct lro_head lro_free;
};
int tcp_lro_init(struct lro_ctrl *);
void tcp_lro_free(struct lro_ctrl *);
void tcp_lro_flush(struct lro_ctrl *, struct lro_entry *);
int tcp_lro_rx(struct lro_ctrl *, struct mbuf *, uint32_t);
#define TCP_LRO_CANNOT -1
#define TCP_LRO_NOT_SUPPORTED 1
#endif /* _TCP_LRO_H_ */