155 lines
5.9 KiB
C
155 lines
5.9 KiB
C
/*
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* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* This file is part of the lwIP TCP/IP stack.
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*
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* Author: Adam Dunkels <adam@sics.se>
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*
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*/
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#ifndef __LWIP_IP_H__
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#define __LWIP_IP_H__
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#include "lwip/arch.h"
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#include "lwip/def.h"
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#include "lwip/pbuf.h"
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#include "lwip/ip_addr.h"
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#include "lwip/err.h"
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void ip_init(void);
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struct netif *ip_route(struct ip_addr *dest);
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err_t ip_input(struct pbuf *p, struct netif *inp);
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err_t ip_output(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest,
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u8_t ttl, u8_t tos, u8_t proto);
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err_t ip_output_if(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest,
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u8_t ttl, u8_t tos, u8_t proto,
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struct netif *netif);
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#define IP_HLEN 20
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#define IP_PROTO_ICMP 1
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#define IP_PROTO_UDP 17
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#define IP_PROTO_UDPLITE 136
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#define IP_PROTO_TCP 6
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/* This is passed as the destination address to ip_output_if (not
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to ip_output), meaning that an IP header already is constructed
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in the pbuf. This is used when TCP retransmits. */
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#ifdef IP_HDRINCL
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#undef IP_HDRINCL
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#endif /* IP_HDRINCL */
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#define IP_HDRINCL NULL
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/* This is the common part of all PCB types. It needs to be at the
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beginning of a PCB type definition. It is located here so that
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changes to this common part are made in one location instead of
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having to change all PCB structs. */
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#define IP_PCB struct ip_addr local_ip; \
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struct ip_addr remote_ip; \
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/* Socket options */ \
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u16_t so_options; \
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/* Type Of Service */ \
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u8_t tos; \
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/* Time To Live */ \
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u8_t ttl
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/*
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* Option flags per-socket. These are the same like SO_XXX.
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*/
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#define SOF_DEBUG (u16_t)0x0001U /* turn on debugging info recording */
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#define SOF_ACCEPTCONN (u16_t)0x0002U /* socket has had listen() */
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#define SOF_REUSEADDR (u16_t)0x0004U /* allow local address reuse */
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#define SOF_KEEPALIVE (u16_t)0x0008U /* keep connections alive */
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#define SOF_DONTROUTE (u16_t)0x0010U /* just use interface addresses */
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#define SOF_BROADCAST (u16_t)0x0020U /* permit sending of broadcast msgs */
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#define SOF_USELOOPBACK (u16_t)0x0040U /* bypass hardware when possible */
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#define SOF_LINGER (u16_t)0x0080U /* linger on close if data present */
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#define SOF_OOBINLINE (u16_t)0x0100U /* leave received OOB data in line */
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#define SOF_REUSEPORT (u16_t)0x0200U /* allow local address & port reuse */
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#ifdef PACK_STRUCT_USE_INCLUDES
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# include "arch/bpstruct.h"
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#endif
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PACK_STRUCT_BEGIN
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struct ip_hdr {
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/* version / header length / type of service */
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PACK_STRUCT_FIELD(u16_t _v_hl_tos);
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/* total length */
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PACK_STRUCT_FIELD(u16_t _len);
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/* identification */
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PACK_STRUCT_FIELD(u16_t _id);
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/* fragment offset field */
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PACK_STRUCT_FIELD(u16_t _offset);
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#define IP_RF 0x8000 /* reserved fragment flag */
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#define IP_DF 0x4000 /* dont fragment flag */
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#define IP_MF 0x2000 /* more fragments flag */
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#define IP_OFFMASK 0x1fff /* mask for fragmenting bits */
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/* time to live / protocol*/
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PACK_STRUCT_FIELD(u16_t _ttl_proto);
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/* checksum */
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PACK_STRUCT_FIELD(u16_t _chksum);
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/* source and destination IP addresses */
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PACK_STRUCT_FIELD(struct ip_addr src);
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PACK_STRUCT_FIELD(struct ip_addr dest);
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} PACK_STRUCT_STRUCT;
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PACK_STRUCT_END
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#ifdef PACK_STRUCT_USE_INCLUDES
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# include "arch/epstruct.h"
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#endif
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#define IPH_V(hdr) (ntohs((hdr)->_v_hl_tos) >> 12)
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#define IPH_HL(hdr) ((ntohs((hdr)->_v_hl_tos) >> 8) & 0x0f)
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#define IPH_TOS(hdr) (ntohs((hdr)->_v_hl_tos) & 0xff)
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#define IPH_LEN(hdr) ((hdr)->_len)
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#define IPH_ID(hdr) ((hdr)->_id)
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#define IPH_OFFSET(hdr) ((hdr)->_offset)
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#define IPH_TTL(hdr) (ntohs((hdr)->_ttl_proto) >> 8)
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#define IPH_PROTO(hdr) (ntohs((hdr)->_ttl_proto) & 0xff)
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#define IPH_CHKSUM(hdr) ((hdr)->_chksum)
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#define IPH_VHLTOS_SET(hdr, v, hl, tos) (hdr)->_v_hl_tos = (htons(((v) << 12) | ((hl) << 8) | (tos)))
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#define IPH_LEN_SET(hdr, len) (hdr)->_len = (len)
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#define IPH_ID_SET(hdr, id) (hdr)->_id = (id)
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#define IPH_OFFSET_SET(hdr, off) (hdr)->_offset = (off)
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#define IPH_TTL_SET(hdr, ttl) (hdr)->_ttl_proto = (htons(IPH_PROTO(hdr) | ((u16_t)(ttl) << 8)))
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#define IPH_PROTO_SET(hdr, proto) (hdr)->_ttl_proto = (htons((proto) | (IPH_TTL(hdr) << 8)))
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#define IPH_CHKSUM_SET(hdr, chksum) (hdr)->_chksum = (chksum)
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#if IP_DEBUG
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void ip_debug_print(struct pbuf *p);
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#else
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#define ip_debug_print(p)
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#endif /* IP_DEBUG */
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#endif /* __LWIP_IP_H__ */
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