/* | |
* Copyright (c) 2001-2004 Swedish Institute of Computer Science. | |
* All rights reserved. | |
* | |
* Redistribution and use in source and binary forms, with or without modification, | |
* are permitted provided that the following conditions are met: | |
* | |
* 1. Redistributions of source code must retain the above copyright notice, | |
* this list of conditions and the following disclaimer. | |
* 2. Redistributions in binary form must reproduce the above copyright notice, | |
* this list of conditions and the following disclaimer in the documentation | |
* and/or other materials provided with the distribution. | |
* 3. The name of the author may not be used to endorse or promote products | |
* derived from this software without specific prior written permission. | |
* | |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT | |
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT | |
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY | |
* OF SUCH DAMAGE. | |
* | |
* This file is part of the lwIP TCP/IP stack. | |
* | |
* Author: Adam Dunkels <adam@sics.se> | |
* | |
*/ | |
#ifndef __LWIP_IP_H__ | |
#define __LWIP_IP_H__ | |
#include "lwip/arch.h" | |
#include "lwip/def.h" | |
#include "lwip/pbuf.h" | |
#include "lwip/ip_addr.h" | |
#include "lwip/err.h" | |
void ip_init(void); | |
struct netif *ip_route(struct ip_addr *dest); | |
err_t ip_input(struct pbuf *p, struct netif *inp); | |
err_t ip_output(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest, | |
u8_t ttl, u8_t tos, u8_t proto); | |
err_t ip_output_if(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest, | |
u8_t ttl, u8_t tos, u8_t proto, | |
struct netif *netif); | |
#define IP_HLEN 20 | |
#define IP_PROTO_ICMP 1 | |
#define IP_PROTO_UDP 17 | |
#define IP_PROTO_UDPLITE 170 | |
#define IP_PROTO_TCP 6 | |
/* This is passed as the destination address to ip_output_if (not | |
to ip_output), meaning that an IP header already is constructed | |
in the pbuf. This is used when TCP retransmits. */ | |
#ifdef IP_HDRINCL | |
#undef IP_HDRINCL | |
#endif /* IP_HDRINCL */ | |
#define IP_HDRINCL NULL | |
/* This is the common part of all PCB types. It needs to be at the | |
beginning of a PCB type definition. It is located here so that | |
changes to this common part are made in one location instead of | |
having to change all PCB structs. */ | |
#define IP_PCB struct ip_addr local_ip; \ | |
struct ip_addr remote_ip; \ | |
/* Socket options */ \ | |
u16_t so_options; \ | |
/* Type Of Service */ \ | |
u8_t tos; \ | |
/* Time To Live */ \ | |
u8_t ttl | |
/* | |
* Option flags per-socket. These are the same like SO_XXX. | |
*/ | |
#define SOF_DEBUG (u16_t)0x0001U /* turn on debugging info recording */ | |
#define SOF_ACCEPTCONN (u16_t)0x0002U /* socket has had listen() */ | |
#define SOF_REUSEADDR (u16_t)0x0004U /* allow local address reuse */ | |
#define SOF_KEEPALIVE (u16_t)0x0008U /* keep connections alive */ | |
#define SOF_DONTROUTE (u16_t)0x0010U /* just use interface addresses */ | |
#define SOF_BROADCAST (u16_t)0x0020U /* permit sending of broadcast msgs */ | |
#define SOF_USELOOPBACK (u16_t)0x0040U /* bypass hardware when possible */ | |
#define SOF_LINGER (u16_t)0x0080U /* linger on close if data present */ | |
#define SOF_OOBINLINE (u16_t)0x0100U /* leave received OOB data in line */ | |
#define SOF_REUSEPORT (u16_t)0x0200U /* allow local address & port reuse */ | |
#ifdef PACK_STRUCT_USE_INCLUDES | |
# include "arch/bpstruct.h" | |
#endif | |
PACK_STRUCT_BEGIN | |
struct ip_hdr { | |
/* version / header length / type of service */ | |
PACK_STRUCT_FIELD(u16_t _v_hl_tos); | |
/* total length */ | |
PACK_STRUCT_FIELD(u16_t _len); | |
/* identification */ | |
PACK_STRUCT_FIELD(u16_t _id); | |
/* fragment offset field */ | |
PACK_STRUCT_FIELD(u16_t _offset); | |
#define IP_RF 0x8000 /* reserved fragment flag */ | |
#define IP_DF 0x4000 /* dont fragment flag */ | |
#define IP_MF 0x2000 /* more fragments flag */ | |
#define IP_OFFMASK 0x1fff /* mask for fragmenting bits */ | |
/* time to live / protocol*/ | |
PACK_STRUCT_FIELD(u16_t _ttl_proto); | |
/* checksum */ | |
PACK_STRUCT_FIELD(u16_t _chksum); | |
/* source and destination IP addresses */ | |
PACK_STRUCT_FIELD(struct ip_addr src); | |
PACK_STRUCT_FIELD(struct ip_addr dest); | |
} PACK_STRUCT_STRUCT; | |
PACK_STRUCT_END | |
#ifdef PACK_STRUCT_USE_INCLUDES | |
# include "arch/epstruct.h" | |
#endif | |
#define IPH_V(hdr) (ntohs((hdr)->_v_hl_tos) >> 12) | |
#define IPH_HL(hdr) ((ntohs((hdr)->_v_hl_tos) >> 8) & 0x0f) | |
#define IPH_TOS(hdr) (ntohs((hdr)->_v_hl_tos) & 0xff) | |
#define IPH_LEN(hdr) ((hdr)->_len) | |
#define IPH_ID(hdr) ((hdr)->_id) | |
#define IPH_OFFSET(hdr) ((hdr)->_offset) | |
#define IPH_TTL(hdr) (ntohs((hdr)->_ttl_proto) >> 8) | |
#define IPH_PROTO(hdr) (ntohs((hdr)->_ttl_proto) & 0xff) | |
#define IPH_CHKSUM(hdr) ((hdr)->_chksum) | |
#define IPH_VHLTOS_SET(hdr, v, hl, tos) (hdr)->_v_hl_tos = (htons(((v) << 12) | ((hl) << 8) | (tos))) | |
#define IPH_LEN_SET(hdr, len) (hdr)->_len = (len) | |
#define IPH_ID_SET(hdr, id) (hdr)->_id = (id) | |
#define IPH_OFFSET_SET(hdr, off) (hdr)->_offset = (off) | |
#define IPH_TTL_SET(hdr, ttl) (hdr)->_ttl_proto = (htons(IPH_PROTO(hdr) | ((ttl) << 8))) | |
#define IPH_PROTO_SET(hdr, proto) (hdr)->_ttl_proto = (htons((proto) | (IPH_TTL(hdr) << 8))) | |
#define IPH_CHKSUM_SET(hdr, chksum) (hdr)->_chksum = (chksum) | |
#if IP_DEBUG | |
void ip_debug_print(struct pbuf *p); | |
#else | |
#define ip_debug_print(p) | |
#endif /* IP_DEBUG */ | |
#endif /* __LWIP_IP_H__ */ | |