ip.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause
    3  *
    4  * Copyright (c) 2020-2021 The FreeBSD Foundation
    5  *
    6  * This software was developed by Björn Zeeb under sponsorship from
    7  * the FreeBSD Foundation.
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice, this list of conditions and the following disclaimer.
   14  * 2. Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in the
   16  *    documentation and/or other materials provided with the distribution.
   17  *
   18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   28  * SUCH DAMAGE.
   29  *
   30  * $FreeBSD$
   31  */
   32 
   33 #ifndef _LINUXKPI_LINUX_IP_H
   34 #define _LINUXKPI_LINUX_IP_H
   35 
   36 #include <sys/types.h>
   37 
   38 #include <netinet/in.h>
   39 #include <netinet/ip.h>
   40 #include <machine/in_cksum.h>
   41 
   42 #include <linux/skbuff.h>
   43 
   44 /* (u) unconfirmed structure field names; using FreeBSD's meanwhile. */
   45 struct iphdr {
   46         uint8_t         ip_hl:4, ip_ver:4;      /* (u) */
   47         uint8_t         ip_tos;                 /* (u) */
   48         uint16_t        ip_len;                 /* (u) */
   49         uint16_t        id;
   50         uint16_t        ip_off;                 /* (u) */
   51         uint8_t         ip_ttl;                 /* (u) */
   52         uint8_t         protocol;
   53         uint16_t        check;
   54         uint32_t        saddr;
   55         uint32_t        daddr;
   56 };
   57 
   58 static __inline struct iphdr *
   59 ip_hdr(struct sk_buff *skb)
   60 {
   61 
   62         return (struct iphdr *)skb_network_header(skb);
   63 }
   64 
   65 static __inline void
   66 ip_send_check(struct iphdr *iph)
   67 {
   68 
   69         /* Clear the checksum before computing! */
   70         iph->check = 0;
   71         /* An IPv4 header is the same everywhere even if names differ. */
   72         iph->check = in_cksum_hdr((const void *)iph);
   73 }
   74 
   75 #endif  /* _LINUXKPI_LINUX_IP_H */

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FreeBSD/Linux Kernel Cross Reference sys/compat/linuxkpi/common/include/linux/ip.h

FreeBSD/Linux Kernel Cross Reference
sys/compat/linuxkpi/common/include/linux/ip.h