tcp_lro.h

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    1 /*-
    2  * Copyright (c) 2006, Myricom Inc.
    3  * Copyright (c) 2008, Intel Corporation.
    4  * All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   25  * SUCH DAMAGE.
   26  *
   27  * $FreeBSD: releng/8.4/sys/netinet/tcp_lro.h 236092 2012-05-26 10:24:35Z bz $
   28  */
   29 
   30 #ifndef _TCP_LRO_H_
   31 #define _TCP_LRO_H_
   32 
   33 struct lro_entry;
   34 struct lro_entry
   35 {
   36         SLIST_ENTRY(lro_entry) next;
   37         struct mbuf     *m_head;
   38         struct mbuf     *m_tail;
   39         int             timestamp;
   40         struct ip       *ip;
   41         uint32_t        tsval;
   42         uint32_t        tsecr;
   43         uint32_t        source_ip;
   44         uint32_t        dest_ip;
   45         uint32_t        next_seq;
   46         uint32_t        ack_seq;
   47         uint32_t        len;
   48         uint32_t        data_csum;
   49         uint16_t        window;
   50         uint16_t        source_port;
   51         uint16_t        dest_port;
   52         uint16_t        append_cnt;
   53         uint16_t        mss;
   54         
   55 };
   56 SLIST_HEAD(lro_head, lro_entry);
   57 
   58 struct lro_ctrl {
   59         struct ifnet    *ifp;
   60         int             lro_queued;
   61         int             lro_flushed;
   62         int             lro_bad_csum;
   63         int             lro_cnt;
   64 
   65         struct lro_head lro_active;
   66         struct lro_head lro_free;
   67 };
   68 
   69 
   70 int tcp_lro_init(struct lro_ctrl *);
   71 void tcp_lro_free(struct lro_ctrl *);
   72 void tcp_lro_flush(struct lro_ctrl *, struct lro_entry *);
   73 int tcp_lro_rx(struct lro_ctrl *, struct mbuf *, uint32_t);
   74 
   75 /* Number of LRO entries - these are per rx queue */
   76 #define LRO_ENTRIES                     8
   77 
   78 #endif /* _TCP_LRO_H_ */

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FreeBSD/Linux Kernel Cross Reference sys/netinet/tcp_lro.h

FreeBSD/Linux Kernel Cross Reference
sys/netinet/tcp_lro.h