1/*
2 * Copyright (c) 2011 Apple Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28
29#ifndef LRO_EXT_H_
30#define LRO_EXT_H_
31
32#ifdef BSD_KERNEL_PRIVATE
33
34/* All definitions exported from LRO go into this file */
35
36extern int sw_lro;
37extern int lrodebug;
38extern unsigned int coalesc_sz;
39
40/* flow return values */
41#define TCP_LRO_NAN 0x00 /* No flow exists */
42#define TCP_LRO_CONSUMED 0x01 /* LRO consumed the packet */
43#define TCP_LRO_EJECT_FLOW 0x02 /* LRO ejected the flow */
44#define TCP_LRO_COALESCE 0x03 /* LRO to coalesce the packet */
45#define TCP_LRO_COLLISION 0x04 /* Two flows map to the same slot */
46
47void tcp_lro_init(void);
48
49/* When doing LRO in IP call this function */
50struct mbuf* tcp_lro(struct mbuf *m, unsigned int hlen);
51
52/* TCP calls this to start coalescing a flow */
53int tcp_start_coalescing(struct ip *, struct tcphdr *, int tlen);
54
55/* TCP calls this to stop coalescing a flow */
56int tcp_lro_remove_state(struct in_addr, struct in_addr, unsigned short,
57 unsigned short);
58
59/* TCP calls this to keep the seq number updated */
60void tcp_update_lro_seq(__uint32_t, struct in_addr, struct in_addr,
61 unsigned short, unsigned short);
62
63#endif
64
65#endif /* LRO_EXT_H_ */
66