| /* |
| * 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/opt.h" |
| |
| #include "lwip/def.h" |
| #include "lwip/pbuf.h" |
| #include "lwip/ip_addr.h" |
| #include "lwip/err.h" |
| #include "lwip/netif.h" |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /** Currently, the function ip_output_if_opt() is only used with IGMP */ |
| #define IP_OPTIONS_SEND LWIP_IGMP |
| |
| #define IP_HLEN 20 |
| |
| #define IP_PROTO_ICMP 1 |
| #define IP_PROTO_UDP 17 |
| #define IP_PROTO_UDPLITE 136 |
| #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 |
| |
| #if LWIP_NETIF_HWADDRHINT |
| #define IP_PCB_ADDRHINT ;u8_t addr_hint |
| #else |
| #define IP_PCB_ADDRHINT |
| #endif /* LWIP_NETIF_HWADDRHINT */ |
| |
| /* 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 \ |
| /* ip addresses in network byte order */ \ |
| 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 \ |
| /* link layer address resolution hint */ \ |
| IP_PCB_ADDRHINT |
| |
| struct ip_pcb { |
| /* Common members of all PCB types */ |
| IP_PCB; |
| }; |
| |
| /* |
| * 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 to send and to receive broadcast messages (see IP_SOF_BROADCAST option) */ |
| #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) | ((u16_t)(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) |
| |
| /** The interface that provided the packet for the current callback invocation. */ |
| extern struct netif *current_netif; |
| /** Header of the input packet currently being processed. */ |
| extern const struct ip_hdr *current_header; |
| |
| #define ip_init() /* Compatibility define, not init needed. */ |
| 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); |
| #if LWIP_NETIF_HWADDRHINT |
| err_t ip_output_hinted(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest, |
| u8_t ttl, u8_t tos, u8_t proto, u8_t *addr_hint); |
| #endif /* LWIP_NETIF_HWADDRHINT */ |
| #if IP_OPTIONS_SEND |
| err_t ip_output_if_opt(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest, |
| u8_t ttl, u8_t tos, u8_t proto, struct netif *netif, void *ip_options, |
| u16_t optlen); |
| #endif /* IP_OPTIONS_SEND */ |
| /** Get the interface that received the current packet. |
| * This function must only be called from a receive callback (udp_recv, |
| * raw_recv, tcp_accept). It will return NULL otherwise. */ |
| #define ip_current_netif() (current_netif) |
| /** Get the IP header of the current packet. |
| * This function must only be called from a receive callback (udp_recv, |
| * raw_recv, tcp_accept). It will return NULL otherwise. */ |
| #define ip_current_header() (current_header) |
| #if IP_DEBUG |
| void ip_debug_print(struct pbuf *p); |
| #else |
| #define ip_debug_print(p) |
| #endif /* IP_DEBUG */ |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* __LWIP_IP_H__ */ |
| |
| |