tcp_lro.h revision 179737
1/******************************************************************************* 2 3Copyright (c) 2006, Myricom Inc. 4Copyright (c) 2008, Intel Corporation. 5All rights reserved. 6 7Redistribution and use in source and binary forms, with or without 8modification, are permitted provided that the following conditions are met: 9 10 1. Redistributions of source code must retain the above copyright notice, 11 this list of conditions and the following disclaimer. 12 13 2. Neither the name of the Myricom Inc, nor the names of its 14 contributors may be used to endorse or promote products derived from 15 this software without specific prior written permission. 16 17 2. Neither the name of the Intel Corporation, nor the names of its 18 contributors may be used to endorse or promote products derived from 19 this software without specific prior written permission. 20 21THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 22AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 25LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31POSSIBILITY OF SUCH DAMAGE. 32 33 34$FreeBSD: head/sys/netinet/tcp_lro.h 179737 2008-06-11 22:12:50Z jfv $ 35 36***************************************************************************/ 37#ifndef _TCP_LRO_H_ 38#define _TCP_LRO_H_ 39 40struct lro_entry; 41struct lro_entry 42{ 43 SLIST_ENTRY(lro_entry) next; 44 struct mbuf *m_head; 45 struct mbuf *m_tail; 46 int timestamp; 47 struct ip *ip; 48 uint32_t tsval; 49 uint32_t tsecr; 50 uint32_t source_ip; 51 uint32_t dest_ip; 52 uint32_t next_seq; 53 uint32_t ack_seq; 54 uint32_t len; 55 uint32_t data_csum; 56 uint16_t window; 57 uint16_t source_port; 58 uint16_t dest_port; 59 uint16_t append_cnt; 60 uint16_t mss; 61 62}; 63SLIST_HEAD(lro_head, lro_entry); 64 65struct lro_ctrl { 66 struct ifnet *ifp; 67 int lro_queued; 68 int lro_flushed; 69 int lro_bad_csum; 70 int lro_cnt; 71 72 struct lro_head lro_active; 73 struct lro_head lro_free; 74}; 75 76 77int tcp_lro_init(struct lro_ctrl *); 78void tcp_lro_free(struct lro_ctrl *); 79void tcp_lro_flush(struct lro_ctrl *, struct lro_entry *); 80int tcp_lro_rx(struct lro_ctrl *, struct mbuf *, uint32_t); 81 82/* Number of LRO entries - these are per rx queue */ 83#define LRO_ENTRIES 8 84 85#endif /* _TCP_LRO_H_ */ 86