source: UsbWattMeter/trunk/lwip-1.4.1/src/include/ipv4/lwip/ip.h@ 164

Last change on this file since 164 was 164, checked in by coas-nagasima, 6 years ago

TOPPERS/ECNLサンプルアプリ「USB充電器電力計」を追加

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1/*
2 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without modification,
6 * are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice,
9 * this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright notice,
11 * this list of conditions and the following disclaimer in the documentation
12 * and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
19 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
21 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
24 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
25 * OF SUCH DAMAGE.
26 *
27 * This file is part of the lwIP TCP/IP stack.
28 *
29 * Author: Adam Dunkels <adam@sics.se>
30 *
31 */
32#ifndef __LWIP_IP_H__
33#define __LWIP_IP_H__
34
35#include "lwip/opt.h"
36
37#include "lwip/def.h"
38#include "lwip/pbuf.h"
39#include "lwip/ip_addr.h"
40#include "lwip/err.h"
41#include "lwip/netif.h"
42
43#ifdef __cplusplus
44extern "C" {
45#endif
46
47/** Currently, the function ip_output_if_opt() is only used with IGMP */
48#define IP_OPTIONS_SEND LWIP_IGMP
49
50#define IP_HLEN 20
51
52#define IP_PROTO_ICMP 1
53#define IP_PROTO_IGMP 2
54#define IP_PROTO_UDP 17
55#define IP_PROTO_UDPLITE 136
56#define IP_PROTO_TCP 6
57
58/* This is passed as the destination address to ip_output_if (not
59 to ip_output), meaning that an IP header already is constructed
60 in the pbuf. This is used when TCP retransmits. */
61#ifdef IP_HDRINCL
62#undef IP_HDRINCL
63#endif /* IP_HDRINCL */
64#define IP_HDRINCL NULL
65
66#if LWIP_NETIF_HWADDRHINT
67#define IP_PCB_ADDRHINT ;u8_t addr_hint
68#else
69#define IP_PCB_ADDRHINT
70#endif /* LWIP_NETIF_HWADDRHINT */
71
72/* This is the common part of all PCB types. It needs to be at the
73 beginning of a PCB type definition. It is located here so that
74 changes to this common part are made in one location instead of
75 having to change all PCB structs. */
76#define IP_PCB \
77 /* ip addresses in network byte order */ \
78 ip_addr_t local_ip; \
79 ip_addr_t remote_ip; \
80 /* Socket options */ \
81 u8_t so_options; \
82 /* Type Of Service */ \
83 u8_t tos; \
84 /* Time To Live */ \
85 u8_t ttl \
86 /* link layer address resolution hint */ \
87 IP_PCB_ADDRHINT
88
89struct ip_pcb {
90/* Common members of all PCB types */
91 IP_PCB;
92};
93
94/*
95 * Option flags per-socket. These are the same like SO_XXX.
96 */
97/*#define SOF_DEBUG 0x01U Unimplemented: turn on debugging info recording */
98#define SOF_ACCEPTCONN 0x02U /* socket has had listen() */
99#define SOF_REUSEADDR 0x04U /* allow local address reuse */
100#define SOF_KEEPALIVE 0x08U /* keep connections alive */
101/*#define SOF_DONTROUTE 0x10U Unimplemented: just use interface addresses */
102#define SOF_BROADCAST 0x20U /* permit to send and to receive broadcast messages (see IP_SOF_BROADCAST option) */
103/*#define SOF_USELOOPBACK 0x40U Unimplemented: bypass hardware when possible */
104#define SOF_LINGER 0x80U /* linger on close if data present */
105/*#define SOF_OOBINLINE 0x0100U Unimplemented: leave received OOB data in line */
106/*#define SOF_REUSEPORT 0x0200U Unimplemented: allow local address & port reuse */
107
108/* These flags are inherited (e.g. from a listen-pcb to a connection-pcb): */
109#define SOF_INHERITED (SOF_REUSEADDR|SOF_KEEPALIVE|SOF_LINGER/*|SOF_DEBUG|SOF_DONTROUTE|SOF_OOBINLINE*/)
110
111
112#ifdef PACK_STRUCT_USE_INCLUDES
113# include "arch/bpstruct.h"
114#endif
115PACK_STRUCT_BEGIN
116struct ip_hdr {
117 /* version / header length */
118 PACK_STRUCT_FIELD(u8_t _v_hl);
119 /* type of service */
120 PACK_STRUCT_FIELD(u8_t _tos);
121 /* total length */
122 PACK_STRUCT_FIELD(u16_t _len);
123 /* identification */
124 PACK_STRUCT_FIELD(u16_t _id);
125 /* fragment offset field */
126 PACK_STRUCT_FIELD(u16_t _offset);
127#define IP_RF 0x8000U /* reserved fragment flag */
128#define IP_DF 0x4000U /* dont fragment flag */
129#define IP_MF 0x2000U /* more fragments flag */
130#define IP_OFFMASK 0x1fffU /* mask for fragmenting bits */
131 /* time to live */
132 PACK_STRUCT_FIELD(u8_t _ttl);
133 /* protocol*/
134 PACK_STRUCT_FIELD(u8_t _proto);
135 /* checksum */
136 PACK_STRUCT_FIELD(u16_t _chksum);
137 /* source and destination IP addresses */
138 PACK_STRUCT_FIELD(ip_addr_p_t src);
139 PACK_STRUCT_FIELD(ip_addr_p_t dest);
140} PACK_STRUCT_STRUCT;
141PACK_STRUCT_END
142#ifdef PACK_STRUCT_USE_INCLUDES
143# include "arch/epstruct.h"
144#endif
145
146#define IPH_V(hdr) ((hdr)->_v_hl >> 4)
147#define IPH_HL(hdr) ((hdr)->_v_hl & 0x0f)
148#define IPH_TOS(hdr) ((hdr)->_tos)
149#define IPH_LEN(hdr) ((hdr)->_len)
150#define IPH_ID(hdr) ((hdr)->_id)
151#define IPH_OFFSET(hdr) ((hdr)->_offset)
152#define IPH_TTL(hdr) ((hdr)->_ttl)
153#define IPH_PROTO(hdr) ((hdr)->_proto)
154#define IPH_CHKSUM(hdr) ((hdr)->_chksum)
155
156#define IPH_VHL_SET(hdr, v, hl) (hdr)->_v_hl = (((v) << 4) | (hl))
157#define IPH_TOS_SET(hdr, tos) (hdr)->_tos = (tos)
158#define IPH_LEN_SET(hdr, len) (hdr)->_len = (len)
159#define IPH_ID_SET(hdr, id) (hdr)->_id = (id)
160#define IPH_OFFSET_SET(hdr, off) (hdr)->_offset = (off)
161#define IPH_TTL_SET(hdr, ttl) (hdr)->_ttl = (u8_t)(ttl)
162#define IPH_PROTO_SET(hdr, proto) (hdr)->_proto = (u8_t)(proto)
163#define IPH_CHKSUM_SET(hdr, chksum) (hdr)->_chksum = (chksum)
164
165/** The interface that provided the packet for the current callback invocation. */
166extern struct netif *current_netif;
167/** Header of the input packet currently being processed. */
168extern const struct ip_hdr *current_header;
169/** Source IP address of current_header */
170extern ip_addr_t current_iphdr_src;
171/** Destination IP address of current_header */
172extern ip_addr_t current_iphdr_dest;
173
174#define ip_init() /* Compatibility define, not init needed. */
175struct netif *ip_route(ip_addr_t *dest);
176err_t ip_input(struct pbuf *p, struct netif *inp);
177err_t ip_output(struct pbuf *p, ip_addr_t *src, ip_addr_t *dest,
178 u8_t ttl, u8_t tos, u8_t proto);
179err_t ip_output_if(struct pbuf *p, ip_addr_t *src, ip_addr_t *dest,
180 u8_t ttl, u8_t tos, u8_t proto,
181 struct netif *netif);
182#if LWIP_NETIF_HWADDRHINT
183err_t ip_output_hinted(struct pbuf *p, ip_addr_t *src, ip_addr_t *dest,
184 u8_t ttl, u8_t tos, u8_t proto, u8_t *addr_hint);
185#endif /* LWIP_NETIF_HWADDRHINT */
186#if IP_OPTIONS_SEND
187err_t ip_output_if_opt(struct pbuf *p, ip_addr_t *src, ip_addr_t *dest,
188 u8_t ttl, u8_t tos, u8_t proto, struct netif *netif, void *ip_options,
189 u16_t optlen);
190#endif /* IP_OPTIONS_SEND */
191/** Get the interface that received the current packet.
192 * This function must only be called from a receive callback (udp_recv,
193 * raw_recv, tcp_accept). It will return NULL otherwise. */
194#define ip_current_netif() (current_netif)
195/** Get the IP header of the current packet.
196 * This function must only be called from a receive callback (udp_recv,
197 * raw_recv, tcp_accept). It will return NULL otherwise. */
198#define ip_current_header() (current_header)
199/** Source IP address of current_header */
200#define ip_current_src_addr() (&current_iphdr_src)
201/** Destination IP address of current_header */
202#define ip_current_dest_addr() (&current_iphdr_dest)
203
204/** Gets an IP pcb option (SOF_* flags) */
205#define ip_get_option(pcb, opt) ((pcb)->so_options & (opt))
206/** Sets an IP pcb option (SOF_* flags) */
207#define ip_set_option(pcb, opt) ((pcb)->so_options |= (opt))
208/** Resets an IP pcb option (SOF_* flags) */
209#define ip_reset_option(pcb, opt) ((pcb)->so_options &= ~(opt))
210
211#if IP_DEBUG
212void ip_debug_print(struct pbuf *p);
213#else
214#define ip_debug_print(p)
215#endif /* IP_DEBUG */
216
217#ifdef __cplusplus
218}
219#endif
220
221#endif /* __LWIP_IP_H__ */
222
223
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