bsd/netinet/lro_ext.h

   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
  36 extern int sw_lro;
  37 extern int lrodebug;
  38 extern 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
  47 void tcp_lro_init(void);
  48
  49 /* When doing LRO in IP call this function */
  50 struct mbuf* tcp_lro(struct mbuf *m, unsigned int hlen);
  51
  52 /* TCP calls this to start coalescing a flow */
  53 int tcp_start_coalescing(struct ip *, struct tcphdr *, int tlen);
  54
  55 /* TCP calls this to stop coalescing a flow */
  56 int 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 */
  60 void 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_ */