LwIP
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Outline
#define LWIP_HDR_PROT_TCP_H
#include "lwip/arch.h"
#define TCP_HLEN
#include "arch/bpstruct.h"
tcp_hdr
#include "arch/epstruct.h"
#define TCP_FIN
#define TCP_SYN
#define TCP_RST
#define TCP_PSH
#define TCP_ACK
#define TCP_URG
#define TCP_ECE
#define TCP_CWR
#define TCP_FLAGS
#define TCP_MAX_OPTION_BYTES
#define TCPH_HDRLEN
#define TCPH_HDRLEN_BYTES
#define TCPH_FLAGS
#define TCPH_HDRLEN_SET
#define TCPH_FLAGS_SET
#define TCPH_HDRLEN_FLAGS_SET
#define TCPH_SET_FLAG
#define TCPH_UNSET_FLAG
Files
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SourceVuSTM32 Libraries and SamplesLwIPsrc/include/lwip/prot/tcp.h
 
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/** * @file * TCP protocol definitions *//* ... */ /* * 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_HDR_PROT_TCP_H #define LWIP_HDR_PROT_TCP_H #include "lwip/arch.h" #ifdef __cplusplus extern "C" { #endif /* Length of the TCP header, excluding options. */ #define TCP_HLEN 20 /* Fields are (of course) in network byte order. * Some fields are converted to host byte order in tcp_input(). *//* ... */ #ifdef PACK_STRUCT_USE_INCLUDES # include "arch/bpstruct.h" #endif PACK_STRUCT_BEGIN struct tcp_hdr { PACK_STRUCT_FIELD(u16_t src); PACK_STRUCT_FIELD(u16_t dest); PACK_STRUCT_FIELD(u32_t seqno); PACK_STRUCT_FIELD(u32_t ackno); PACK_STRUCT_FIELD(u16_t _hdrlen_rsvd_flags); PACK_STRUCT_FIELD(u16_t wnd); PACK_STRUCT_FIELD(u16_t chksum); PACK_STRUCT_FIELD(u16_t urgp); ...} PACK_STRUCT_STRUCT; PACK_STRUCT_END #ifdef PACK_STRUCT_USE_INCLUDES # include "arch/epstruct.h" #endif /* TCP header flags bits */ #define TCP_FIN 0x01U #define TCP_SYN 0x02U #define TCP_RST 0x04U #define TCP_PSH 0x08U #define TCP_ACK 0x10U #define TCP_URG 0x20U #define TCP_ECE 0x40U #define TCP_CWR 0x80U /* Valid TCP header flags */ #define TCP_FLAGS 0x3fU #define TCP_MAX_OPTION_BYTES 40 #define TCPH_HDRLEN(phdr) ((u16_t)(lwip_ntohs((phdr)->_hdrlen_rsvd_flags) >> 12)) #define TCPH_HDRLEN_BYTES(phdr) ((u8_t)(TCPH_HDRLEN(phdr) << 2)) #define TCPH_FLAGS(phdr) ((u8_t)((lwip_ntohs((phdr)->_hdrlen_rsvd_flags) & TCP_FLAGS))) #define TCPH_HDRLEN_SET(phdr, len) (phdr)->_hdrlen_rsvd_flags = lwip_htons(((len) << 12) | TCPH_FLAGS(phdr)) #define TCPH_FLAGS_SET(phdr, flags) (phdr)->_hdrlen_rsvd_flags = (((phdr)->_hdrlen_rsvd_flags & PP_HTONS(~TCP_FLAGS)) | lwip_htons(flags)) #define TCPH_HDRLEN_FLAGS_SET(phdr, len, flags) (phdr)->_hdrlen_rsvd_flags = (u16_t)(lwip_htons((u16_t)((len) << 12) | (flags))) #define TCPH_SET_FLAG(phdr, flags ) (phdr)->_hdrlen_rsvd_flags = ((phdr)->_hdrlen_rsvd_flags | lwip_htons(flags)) #define TCPH_UNSET_FLAG(phdr, flags) (phdr)->_hdrlen_rsvd_flags = ((phdr)->_hdrlen_rsvd_flags & ~lwip_htons(flags)) 18 defines #ifdef __cplusplus }extern "C" { ... } #endif /* ... */ #endif /* LWIP_HDR_PROT_TCP_H */
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