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b26fb63f2b
Add header files for struct and accessors for IPv4, UDP, and TCP. Only parts of the fields of the structs have been seen while working on wireless drivers. The remaining field names are filled up with the FreeBSD field names for now. If you have insights into their correct naming in Linux, feel free to adjust. Sponsored by: The FreeBSD Foundation MFC after: 2 weeks Reviewed by: hselasky Differential Revision: https://reviews.freebsd.org/D30428
74 lines
2.3 KiB
C
74 lines
2.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2020-2021 The FreeBSD Foundation
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*
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* This software was developed by Björn Zeeb under sponsorship from
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* the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef __LKPI_LINUX_IP_H
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#define __LKPI_LINUX_IP_H
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#include <sys/types.h>
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#include <netinet/ip.h>
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#include <machine/in_cksum.h>
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#include <linux/skbuff.h>
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/* (u) unconfirmed structure field names; using FreeBSD's meanwhile. */
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struct iphdr {
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uint8_t ip_hl:4, ip_ver:4; /* (u) */
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uint8_t ip_tos; /* (u) */
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uint16_t ip_len; /* (u) */
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uint16_t id;
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uint16_t ip_off; /* (u) */
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uint8_t ip_ttl; /* (u) */
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uint8_t protocol;
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uint16_t check;
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uint32_t saddr;
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uint32_t daddr;
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};
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static __inline struct iphdr *
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ip_hdr(struct sk_buff *skb)
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{
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return (struct iphdr *)skb_network_header(skb);
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}
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static __inline void
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ip_send_check(struct iphdr *iph)
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{
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/* Clear the checksum before computing! */
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iph->check = 0;
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/* An IPv4 header is the same everywhere even if names differ. */
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iph->check = in_cksum_hdr((const void *)iph);
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}
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#endif /* __LKPI_LINUX_IP_H */
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