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156 lines
5.7 KiB
156 lines
5.7 KiB
/* |
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* Copyright (c) 2001-2003 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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struct netif; |
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void ip_init(void); |
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u8_t ip_lookup(void *header, struct netif *inp); |
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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 170 |
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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) (htons((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) | ((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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