255 lines
11 KiB
C
255 lines
11 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/opt.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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#include "lwip/netif.h"
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#include "lwip/ip4.h"
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#include "lwip/ip6.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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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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#if LWIP_NETIF_HWADDRHINT
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#define IP_PCB_ADDRHINT ;u8_t addr_hint
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#else
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#define IP_PCB_ADDRHINT
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#endif /* LWIP_NETIF_HWADDRHINT */
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#if LWIP_IPV6
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#define IP_PCB_ISIPV6_MEMBER u8_t isipv6;
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#define IP_PCB_IPVER_EQ(pcb1, pcb2) ((pcb1)->isipv6 == (pcb2)->isipv6)
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#define IP_PCB_IPVER_INPUT_MATCH(pcb) (ip_current_is_v6() ? \
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((pcb)->isipv6 != 0) : \
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((pcb)->isipv6 == 0))
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#define PCB_ISIPV6(pcb) ((pcb)->isipv6)
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#else
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#define IP_PCB_ISIPV6_MEMBER
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#define IP_PCB_IPVER_EQ(pcb1, pcb2) 1
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#define IP_PCB_IPVER_INPUT_MATCH(pcb) 1
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#define PCB_ISIPV6(pcb) 0
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#endif /* LWIP_IPV6 */
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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 \
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IP_PCB_ISIPV6_MEMBER \
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/* ip addresses in network byte order */ \
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ipX_addr_t local_ip; \
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ipX_addr_t remote_ip; \
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/* Socket options */ \
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u8_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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/* link layer address resolution hint */ \
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IP_PCB_ADDRHINT
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struct ip_pcb {
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/* Common members of all PCB types */
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IP_PCB;
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};
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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 0x01U Unimplemented: turn on debugging info recording */
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#define SOF_ACCEPTCONN 0x02U /* socket has had listen() */
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#define SOF_REUSEADDR 0x04U /* allow local address reuse */
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#define SOF_KEEPALIVE 0x08U /* keep connections alive */
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/*#define SOF_DONTROUTE 0x10U Unimplemented: just use interface addresses */
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#define SOF_BROADCAST 0x20U /* permit to send and to receive broadcast messages (see IP_SOF_BROADCAST option) */
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/*#define SOF_USELOOPBACK 0x40U Unimplemented: bypass hardware when possible */
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#define SOF_LINGER 0x80U /* linger on close if data present */
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/*#define SOF_OOBINLINE 0x0100U Unimplemented: leave received OOB data in line */
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/*#define SOF_REUSEPORT 0x0200U Unimplemented: allow local address & port reuse */
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/* These flags are inherited (e.g. from a listen-pcb to a connection-pcb): */
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#define SOF_INHERITED (SOF_REUSEADDR|SOF_KEEPALIVE|SOF_LINGER/*|SOF_DEBUG|SOF_DONTROUTE|SOF_OOBINLINE*/)
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/* Global variables of this module, kept in a struct for efficient access using base+index. */
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struct ip_globals
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{
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/** The interface that provided the packet for the current callback invocation. */
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struct netif *current_netif;
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/** Header of the input packet currently being processed. */
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const struct ip_hdr *current_ip4_header;
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#if LWIP_IPV6
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/** Header of the input IPv6 packet currently being processed. */
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const struct ip6_hdr *current_ip6_header;
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#endif /* LWIP_IPV6 */
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/** Total header length of current_ip4/6_header (i.e. after this, the UDP/TCP header starts) */
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u16_t current_ip_header_tot_len;
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/** Source IP address of current_header */
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ipX_addr_t current_iphdr_src;
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/** Destination IP address of current_header */
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ipX_addr_t current_iphdr_dest;
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};
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extern struct ip_globals ip_data;
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/** Get the interface that received the current packet.
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* This function must only be called from a receive callback (udp_recv,
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* raw_recv, tcp_accept). It will return NULL otherwise. */
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#define ip_current_netif() (ip_data.current_netif)
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/** Get the IP header of the current packet.
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* This function must only be called from a receive callback (udp_recv,
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* raw_recv, tcp_accept). It will return NULL otherwise. */
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#define ip_current_header() (ip_data.current_ip4_header)
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/** Total header length of ip(6)_current_header() (i.e. after this, the UDP/TCP header starts) */
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#define ip_current_header_tot_len() (ip_data.current_ip_header_tot_len)
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/** Source IP address of current_header */
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#define ipX_current_src_addr() (&ip_data.current_iphdr_src)
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/** Destination IP address of current_header */
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#define ipX_current_dest_addr() (&ip_data.current_iphdr_dest)
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#if LWIP_IPV6
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/** Get the IPv6 header of the current packet.
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* This function must only be called from a receive callback (udp_recv,
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* raw_recv, tcp_accept). It will return NULL otherwise. */
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#define ip6_current_header() (ip_data.current_ip6_header)
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/** Returns TRUE if the current IP input packet is IPv6, FALSE if it is IPv4 */
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#define ip_current_is_v6() (ip6_current_header() != NULL)
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/** Source IPv6 address of current_header */
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#define ip6_current_src_addr() (ipX_2_ip6(&ip_data.current_iphdr_src))
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/** Destination IPv6 address of current_header */
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#define ip6_current_dest_addr() (ipX_2_ip6(&ip_data.current_iphdr_dest))
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/** Get the transport layer protocol */
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#define ip_current_header_proto() (ip_current_is_v6() ? \
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IP6H_NEXTH(ip6_current_header()) :\
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IPH_PROTO(ip_current_header()))
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/** Get the transport layer header */
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#define ipX_next_header_ptr() ((void*)((ip_current_is_v6() ? \
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(u8_t*)ip6_current_header() : (u8_t*)ip_current_header()) + ip_current_header_tot_len()))
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/** Set an IP_PCB to IPv6 (IPv4 is the default) */
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#define ip_set_v6(pcb, val) do{if(pcb != NULL) { pcb->isipv6 = val; }}while(0)
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/** Source IP4 address of current_header */
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#define ip_current_src_addr() (ipX_2_ip(&ip_data.current_iphdr_src))
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/** Destination IP4 address of current_header */
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#define ip_current_dest_addr() (ipX_2_ip(&ip_data.current_iphdr_dest))
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#else /* LWIP_IPV6 */
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/** Always returns FALSE when only supporting IPv4 */
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#define ip_current_is_v6() 0
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/** Get the transport layer protocol */
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#define ip_current_header_proto() IPH_PROTO(ip_current_header())
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/** Get the transport layer header */
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#define ipX_next_header_ptr() ((void*)((u8_t*)ip_current_header() + ip_current_header_tot_len()))
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/** Source IP4 address of current_header */
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#define ip_current_src_addr() (&ip_data.current_iphdr_src)
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/** Destination IP4 address of current_header */
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#define ip_current_dest_addr() (&ip_data.current_iphdr_dest)
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#endif /* LWIP_IPV6 */
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/** Union source address of current_header */
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#define ipX_current_src_addr() (&ip_data.current_iphdr_src)
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/** Union destination address of current_header */
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#define ipX_current_dest_addr() (&ip_data.current_iphdr_dest)
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/** Gets an IP pcb option (SOF_* flags) */
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#define ip_get_option(pcb, opt) ((pcb)->so_options & (opt))
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/** Sets an IP pcb option (SOF_* flags) */
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#define ip_set_option(pcb, opt) ((pcb)->so_options |= (opt))
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/** Resets an IP pcb option (SOF_* flags) */
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#define ip_reset_option(pcb, opt) ((pcb)->so_options &= ~(opt))
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#if LWIP_IPV6
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#define ipX_output(isipv6, p, src, dest, ttl, tos, proto) \
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((isipv6) ? \
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ip6_output(p, ipX_2_ip6(src), ipX_2_ip6(dest), ttl, tos, proto) : \
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ip_output(p, ipX_2_ip(src), ipX_2_ip(dest), ttl, tos, proto))
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#define ipX_output_if(isipv6, p, src, dest, ttl, tos, proto, netif) \
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((isipv6) ? \
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ip6_output_if(p, ip_2_ip6(src), ip_2_ip6(dest), ttl, tos, proto, netif) : \
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ip_output_if(p, (src), (dest), ttl, tos, proto, netif))
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#define ipX_output_hinted(isipv6, p, src, dest, ttl, tos, proto, addr_hint) \
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((isipv6) ? \
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ip6_output_hinted(p, ipX_2_ip6(src), ipX_2_ip6(dest), ttl, tos, proto, addr_hint) : \
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ip_output_hinted(p, ipX_2_ip(src), ipX_2_ip(dest), ttl, tos, proto, addr_hint))
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#define ipX_route(isipv6, src, dest) \
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((isipv6) ? \
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ip6_route(ipX_2_ip6(src), ipX_2_ip6(dest)) : \
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ip_route(ipX_2_ip(dest)))
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#define ipX_netif_get_local_ipX(isipv6, netif, dest) \
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((isipv6) ? \
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ip6_netif_get_local_ipX(netif, ipX_2_ip6(dest)) : \
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ip_netif_get_local_ipX(netif))
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#define ipX_debug_print(is_ipv6, p) ((is_ipv6) ? ip6_debug_print(p) : ip_debug_print(p))
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#else /* LWIP_IPV6 */
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#define ipX_output(isipv6, p, src, dest, ttl, tos, proto) \
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ip_output(p, src, dest, ttl, tos, proto)
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#define ipX_output_if(isipv6, p, src, dest, ttl, tos, proto, netif) \
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ip_output_if(p, src, dest, ttl, tos, proto, netif)
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#define ipX_output_hinted(isipv6, p, src, dest, ttl, tos, proto, addr_hint) \
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ip_output_hinted(p, src, dest, ttl, tos, proto, addr_hint)
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#define ipX_route(isipv6, src, dest) \
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ip_route(ipX_2_ip(dest))
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#define ipX_netif_get_local_ipX(isipv6, netif, dest) \
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ip_netif_get_local_ipX(netif)
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#define ipX_debug_print(is_ipv6, p) ip_debug_print(p)
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#endif /* LWIP_IPV6 */
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#define ipX_route_get_local_ipX(isipv6, src, dest, netif, ipXaddr) do { \
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(netif) = ipX_route(isipv6, src, dest); \
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(ipXaddr) = ipX_netif_get_local_ipX(isipv6, netif, dest); \
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}while(0)
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#ifdef __cplusplus
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}
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#endif
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#endif /* __LWIP_IP_H__ */
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