ReactOS 0.4.16-dev-297-gc569aee
ip4.h
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1
6/*
7 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without modification,
11 * are permitted provided that the following conditions are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright notice,
14 * this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright notice,
16 * this list of conditions and the following disclaimer in the documentation
17 * and/or other materials provided with the distribution.
18 * 3. The name of the author may not be used to endorse or promote products
19 * derived from this software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
22 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
24 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
26 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
29 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
30 * OF SUCH DAMAGE.
31 *
32 * This file is part of the lwIP TCP/IP stack.
33 *
34 * Author: Adam Dunkels <adam@sics.se>
35 *
36 */
37#ifndef LWIP_HDR_PROT_IP4_H
38#define LWIP_HDR_PROT_IP4_H
39
40#include "lwip/arch.h"
41#include "lwip/ip4_addr.h"
42
43#ifdef __cplusplus
44extern "C" {
45#endif
46
49#ifdef PACK_STRUCT_USE_INCLUDES
50# include "arch/bpstruct.h"
51#endif
57#ifdef PACK_STRUCT_USE_INCLUDES
58# include "arch/epstruct.h"
59#endif
60
62
63/* Size of the IPv4 header. Same as 'sizeof(struct ip_hdr)'. */
64#define IP_HLEN 20
65/* Maximum size of the IPv4 header with options. */
66#define IP_HLEN_MAX 60
67
68#ifdef PACK_STRUCT_USE_INCLUDES
69# include "arch/bpstruct.h"
70#endif
72/* The IPv4 header */
73struct ip_hdr {
74 /* version / header length */
76 /* type of service */
78 /* total length */
80 /* identification */
82 /* fragment offset field */
84#define IP_RF 0x8000U /* reserved fragment flag */
85#define IP_DF 0x4000U /* don't fragment flag */
86#define IP_MF 0x2000U /* more fragments flag */
87#define IP_OFFMASK 0x1fffU /* mask for fragmenting bits */
88 /* time to live */
90 /* protocol*/
92 /* checksum */
94 /* source and destination IP addresses */
99#ifdef PACK_STRUCT_USE_INCLUDES
100# include "arch/epstruct.h"
101#endif
102
103/* Macros to get struct ip_hdr fields: */
104#define IPH_V(hdr) ((hdr)->_v_hl >> 4)
105#define IPH_HL(hdr) ((hdr)->_v_hl & 0x0f)
106#define IPH_HL_BYTES(hdr) ((u8_t)(IPH_HL(hdr) * 4))
107#define IPH_TOS(hdr) ((hdr)->_tos)
108#define IPH_LEN(hdr) ((hdr)->_len)
109#define IPH_ID(hdr) ((hdr)->_id)
110#define IPH_OFFSET(hdr) ((hdr)->_offset)
111#define IPH_OFFSET_BYTES(hdr) ((u16_t)((lwip_ntohs(IPH_OFFSET(hdr)) & IP_OFFMASK) * 8U))
112#define IPH_TTL(hdr) ((hdr)->_ttl)
113#define IPH_PROTO(hdr) ((hdr)->_proto)
114#define IPH_CHKSUM(hdr) ((hdr)->_chksum)
115
116/* Macros to set struct ip_hdr fields: */
117#define IPH_VHL_SET(hdr, v, hl) (hdr)->_v_hl = (u8_t)((((v) << 4) | (hl)))
118#define IPH_TOS_SET(hdr, tos) (hdr)->_tos = (tos)
119#define IPH_LEN_SET(hdr, len) (hdr)->_len = (len)
120#define IPH_ID_SET(hdr, id) (hdr)->_id = (id)
121#define IPH_OFFSET_SET(hdr, off) (hdr)->_offset = (off)
122#define IPH_TTL_SET(hdr, ttl) (hdr)->_ttl = (u8_t)(ttl)
123#define IPH_PROTO_SET(hdr, proto) (hdr)->_proto = (u8_t)(proto)
124#define IPH_CHKSUM_SET(hdr, chksum) (hdr)->_chksum = (chksum)
125
126
127#ifdef __cplusplus
128}
129#endif
130
131#endif /* LWIP_HDR_PROT_IP4_H */
GLenum src
Definition: glext.h:6340
GLenum const GLvoid * addr
Definition: glext.h:9621
#define PACK_STRUCT_END
Definition: arch.h:316
uint32_t u32_t
Definition: arch.h:129
uint8_t u8_t
Definition: arch.h:125
#define PACK_STRUCT_BEGIN
Definition: arch.h:307
uint16_t u16_t
Definition: arch.h:127
static char * dest
Definition: rtl.c:135
PACK_STRUCT_BEGIN struct ip4_addr_packed PACK_STRUCT_STRUCT
typedefPACK_STRUCT_END struct ip4_addr_packed ip4_addr_p_t
Definition: ip4.h:61
PACK_STRUCT_FIELD(u32_t addr)
Definition: ip4.h:73
PACK_STRUCT_FLD_8(u8_t _proto)
PACK_STRUCT_FIELD(u16_t _offset)
PACK_STRUCT_FLD_8(u8_t _v_hl)
PACK_STRUCT_FIELD(u16_t _chksum)
PACK_STRUCT_FIELD(u16_t _id)
PACK_STRUCT_FLD_8(u8_t _tos)
PACK_STRUCT_FLD_S(ip4_addr_p_t src)
PACK_STRUCT_FIELD(u16_t _len)
PACK_STRUCT_FLD_S(ip4_addr_p_t dest)
PACK_STRUCT_FLD_8(u8_t _ttl)