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/*
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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_TCP_IMPL_H__
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#define __LWIP_TCP_IMPL_H__
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#include "lwip/opt.h"
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#if LWIP_TCP /* don't build if not configured for use in lwipopts.h */
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#include "lwip/tcp.h"
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#include "lwip/sys.h"
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#include "lwip/mem.h"
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#include "lwip/pbuf.h"
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#include "lwip/ip.h"
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#include "lwip/icmp.h"
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#include "lwip/err.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Functions for interfacing with TCP: */
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/* Lower layer interface to TCP: */
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#define tcp_init() /* Compatibility define, no init needed. */
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void tcp_tmr (void); /* Must be called every
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TCP_TMR_INTERVAL
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ms. (Typically 250 ms). */
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/* It is also possible to call these two functions at the right
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intervals (instead of calling tcp_tmr()). */
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void tcp_slowtmr (void);
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void tcp_fasttmr (void);
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/* Only used by IP to pass a TCP segment to TCP: */
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void tcp_input (struct pbuf *p, struct netif *inp);
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/* Used within the TCP code only: */
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struct tcp_pcb * tcp_alloc (u8_t prio);
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void tcp_abandon (struct tcp_pcb *pcb, int reset);
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err_t tcp_send_empty_ack(struct tcp_pcb *pcb);
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void tcp_rexmit (struct tcp_pcb *pcb);
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void tcp_rexmit_rto (struct tcp_pcb *pcb);
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void tcp_rexmit_fast (struct tcp_pcb *pcb);
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u32_t tcp_update_rcv_ann_wnd(struct tcp_pcb *pcb);
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/**
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* This is the Nagle algorithm: try to combine user data to send as few TCP
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* segments as possible. Only send if
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* - no previously transmitted data on the connection remains unacknowledged or
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* - the TF_NODELAY flag is set (nagle algorithm turned off for this pcb) or
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* - the only unsent segment is at least pcb->mss bytes long (or there is more
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* than one unsent segment - with lwIP, this can happen although unsent->len < mss)
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* - or if we are in fast-retransmit (TF_INFR)
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*/
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#define tcp_do_output_nagle(tpcb) ((((tpcb)->unacked == NULL) || \
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((tpcb)->flags & (TF_NODELAY | TF_INFR)) || \
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(((tpcb)->unsent != NULL) && (((tpcb)->unsent->next != NULL) || \
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((tpcb)->unsent->len >= (tpcb)->mss))) \
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) ? 1 : 0)
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#define tcp_output_nagle(tpcb) (tcp_do_output_nagle(tpcb) ? tcp_output(tpcb) : ERR_OK)
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#define TCP_SEQ_LT(a,b) ((s32_t)((a)-(b)) < 0)
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#define TCP_SEQ_LEQ(a,b) ((s32_t)((a)-(b)) <= 0)
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#define TCP_SEQ_GT(a,b) ((s32_t)((a)-(b)) > 0)
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#define TCP_SEQ_GEQ(a,b) ((s32_t)((a)-(b)) >= 0)
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/* is b<=a<=c? */
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#if 0 /* see bug #10548 */
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#define TCP_SEQ_BETWEEN(a,b,c) ((c)-(b) >= (a)-(b))
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#endif
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#define TCP_SEQ_BETWEEN(a,b,c) (TCP_SEQ_GEQ(a,b) && TCP_SEQ_LEQ(a,c))
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#define TCP_FIN 0x01U
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#define TCP_SYN 0x02U
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#define TCP_RST 0x04U
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#define TCP_PSH 0x08U
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#define TCP_ACK 0x10U
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#define TCP_URG 0x20U
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#define TCP_ECE 0x40U
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#define TCP_CWR 0x80U
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#define TCP_FLAGS 0x3fU
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/* Length of the TCP header, excluding options. */
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#define TCP_HLEN 20
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#ifndef TCP_TMR_INTERVAL
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#define TCP_TMR_INTERVAL 250 /* The TCP timer interval in milliseconds. */
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#endif /* TCP_TMR_INTERVAL */
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#ifndef TCP_FAST_INTERVAL
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#define TCP_FAST_INTERVAL TCP_TMR_INTERVAL /* the fine grained timeout in milliseconds */
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#endif /* TCP_FAST_INTERVAL */
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#ifndef TCP_SLOW_INTERVAL
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#define TCP_SLOW_INTERVAL (2*TCP_TMR_INTERVAL) /* the coarse grained timeout in milliseconds */
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#endif /* TCP_SLOW_INTERVAL */
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#define TCP_FIN_WAIT_TIMEOUT 20000 /* milliseconds */
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#define TCP_SYN_RCVD_TIMEOUT 20000 /* milliseconds */
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#define TCP_OOSEQ_TIMEOUT 6U /* x RTO */
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#ifndef TCP_MSL
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#define TCP_MSL 60000UL /* The maximum segment lifetime in milliseconds */
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#endif
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/* Keepalive values, compliant with RFC 1122. Don't change this unless you know what you're doing */
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#ifndef TCP_KEEPIDLE_DEFAULT
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#define TCP_KEEPIDLE_DEFAULT 7200000UL /* Default KEEPALIVE timer in milliseconds */
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#endif
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#ifndef TCP_KEEPINTVL_DEFAULT
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#define TCP_KEEPINTVL_DEFAULT 75000UL /* Default Time between KEEPALIVE probes in milliseconds */
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#endif
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#ifndef TCP_KEEPCNT_DEFAULT
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#define TCP_KEEPCNT_DEFAULT 9U /* Default Counter for KEEPALIVE probes */
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#endif
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#define TCP_MAXIDLE TCP_KEEPCNT_DEFAULT * TCP_KEEPINTVL_DEFAULT /* Maximum KEEPALIVE probe time */
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/* Fields are (of course) in network byte order.
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* Some fields are converted to host byte order in tcp_input().
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*/
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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 tcp_hdr {
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PACK_STRUCT_FIELD(u16_t src);
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PACK_STRUCT_FIELD(u16_t dest);
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PACK_STRUCT_FIELD(u32_t seqno);
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PACK_STRUCT_FIELD(u32_t ackno);
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PACK_STRUCT_FIELD(u16_t _hdrlen_rsvd_flags);
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PACK_STRUCT_FIELD(u16_t wnd);
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PACK_STRUCT_FIELD(u16_t chksum);
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PACK_STRUCT_FIELD(u16_t urgp);
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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 TCPH_OFFSET(phdr) (ntohs((phdr)->_hdrlen_rsvd_flags) >> 8)
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#define TCPH_HDRLEN(phdr) (ntohs((phdr)->_hdrlen_rsvd_flags) >> 12)
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#define TCPH_FLAGS(phdr) (ntohs((phdr)->_hdrlen_rsvd_flags) & TCP_FLAGS)
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#define TCPH_OFFSET_SET(phdr, offset) (phdr)->_hdrlen_rsvd_flags = htons(((offset) << 8) | TCPH_FLAGS(phdr))
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#define TCPH_HDRLEN_SET(phdr, len) (phdr)->_hdrlen_rsvd_flags = htons(((len) << 12) | TCPH_FLAGS(phdr))
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#define TCPH_FLAGS_SET(phdr, flags) (phdr)->_hdrlen_rsvd_flags = (((phdr)->_hdrlen_rsvd_flags & PP_HTONS((u16_t)(~(u16_t)(TCP_FLAGS)))) | htons(flags))
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#define TCPH_HDRLEN_FLAGS_SET(phdr, len, flags) (phdr)->_hdrlen_rsvd_flags = htons(((len) << 12) | (flags))
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#define TCPH_SET_FLAG(phdr, flags ) (phdr)->_hdrlen_rsvd_flags = ((phdr)->_hdrlen_rsvd_flags | htons(flags))
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#define TCPH_UNSET_FLAG(phdr, flags) (phdr)->_hdrlen_rsvd_flags = htons(ntohs((phdr)->_hdrlen_rsvd_flags) | (TCPH_FLAGS(phdr) & ~(flags)) )
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#define TCP_TCPLEN(seg) ((seg)->len + ((TCPH_FLAGS((seg)->tcphdr) & (TCP_FIN | TCP_SYN)) != 0))
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/** Flags used on input processing, not on pcb->flags
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*/
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189
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#define TF_RESET (u8_t)0x08U /* Connection was reset. */
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#define TF_CLOSED (u8_t)0x10U /* Connection was sucessfully closed. */
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191
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#define TF_GOT_FIN (u8_t)0x20U /* Connection was closed by the remote end. */
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192
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193
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194
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#if LWIP_EVENT_API
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#define TCP_EVENT_ACCEPT(pcb,err,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\
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197
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LWIP_EVENT_ACCEPT, NULL, 0, err)
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198
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#define TCP_EVENT_SENT(pcb,space,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\
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199
|
LWIP_EVENT_SENT, NULL, space, ERR_OK)
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200
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#define TCP_EVENT_RECV(pcb,p,err,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\
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201
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LWIP_EVENT_RECV, (p), 0, (err))
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202
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#define TCP_EVENT_CLOSED(pcb,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\
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203
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LWIP_EVENT_RECV, NULL, 0, ERR_OK)
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204
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#define TCP_EVENT_CONNECTED(pcb,err,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\
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205
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LWIP_EVENT_CONNECTED, NULL, 0, (err))
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206
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#define TCP_EVENT_POLL(pcb,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\
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207
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LWIP_EVENT_POLL, NULL, 0, ERR_OK)
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208
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#define TCP_EVENT_ERR(errf,arg,err) lwip_tcp_event((arg), NULL, \
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209
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LWIP_EVENT_ERR, NULL, 0, (err))
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210
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211
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#else /* LWIP_EVENT_API */
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212
|
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213
|
#define TCP_EVENT_ACCEPT(pcb,err,ret) \
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214
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do { \
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215
|
if((pcb)->accept != NULL) \
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216
|
(ret) = (pcb)->accept((pcb)->callback_arg,(pcb),(err)); \
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217
|
else (ret) = ERR_ARG; \
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|
218
|
} while (0)
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|
219
|
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220
|
#define TCP_EVENT_SENT(pcb,space,ret) \
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221
|
do { \
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|
222
|
if((pcb)->sent != NULL) \
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223
|
(ret) = (pcb)->sent((pcb)->callback_arg,(pcb),(space)); \
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| mbed714 |
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|
224
|
else (ret) = ERR_OK; \
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| mbed714 |
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|
225
|
} while (0)
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| mbed714 |
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|
226
|
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| mbed714 |
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|
227
|
#define TCP_EVENT_RECV(pcb,p,err,ret) \
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| mbed714 |
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|
228
|
do { \
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| mbed714 |
0:d616ece2d859
|
229
|
if((pcb)->recv != NULL) { \
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| mbed714 |
0:d616ece2d859
|
230
|
(ret) = (pcb)->recv((pcb)->callback_arg,(pcb),(p),(err));\
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| mbed714 |
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|
231
|
} else { \
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|
232
|
(ret) = tcp_recv_null(NULL, (pcb), (p), (err)); \
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| mbed714 |
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|
233
|
} \
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| mbed714 |
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|
234
|
} while (0)
|
| mbed714 |
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|
235
|
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| mbed714 |
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|
236
|
#define TCP_EVENT_CLOSED(pcb,ret) \
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| mbed714 |
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|
237
|
do { \
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| mbed714 |
0:d616ece2d859
|
238
|
if(((pcb)->recv != NULL)) { \
|
| mbed714 |
0:d616ece2d859
|
239
|
(ret) = (pcb)->recv((pcb)->callback_arg,(pcb),NULL,ERR_OK);\
|
| mbed714 |
0:d616ece2d859
|
240
|
} else { \
|
| mbed714 |
0:d616ece2d859
|
241
|
(ret) = ERR_OK; \
|
| mbed714 |
0:d616ece2d859
|
242
|
} \
|
| mbed714 |
0:d616ece2d859
|
243
|
} while (0)
|
| mbed714 |
0:d616ece2d859
|
244
|
|
| mbed714 |
0:d616ece2d859
|
245
|
#define TCP_EVENT_CONNECTED(pcb,err,ret) \
|
| mbed714 |
0:d616ece2d859
|
246
|
do { \
|
| mbed714 |
0:d616ece2d859
|
247
|
if((pcb)->connected != NULL) \
|
| mbed714 |
0:d616ece2d859
|
248
|
(ret) = (pcb)->connected((pcb)->callback_arg,(pcb),(err)); \
|
| mbed714 |
0:d616ece2d859
|
249
|
else (ret) = ERR_OK; \
|
| mbed714 |
0:d616ece2d859
|
250
|
} while (0)
|
| mbed714 |
0:d616ece2d859
|
251
|
|
| mbed714 |
0:d616ece2d859
|
252
|
#define TCP_EVENT_POLL(pcb,ret) \
|
| mbed714 |
0:d616ece2d859
|
253
|
do { \
|
| mbed714 |
0:d616ece2d859
|
254
|
if((pcb)->poll != NULL) \
|
| mbed714 |
0:d616ece2d859
|
255
|
(ret) = (pcb)->poll((pcb)->callback_arg,(pcb)); \
|
| mbed714 |
0:d616ece2d859
|
256
|
else (ret) = ERR_OK; \
|
| mbed714 |
0:d616ece2d859
|
257
|
} while (0)
|
| mbed714 |
0:d616ece2d859
|
258
|
|
| mbed714 |
0:d616ece2d859
|
259
|
#define TCP_EVENT_ERR(errf,arg,err) \
|
| mbed714 |
0:d616ece2d859
|
260
|
do { \
|
| mbed714 |
0:d616ece2d859
|
261
|
if((errf) != NULL) \
|
| mbed714 |
0:d616ece2d859
|
262
|
(errf)((arg),(err)); \
|
| mbed714 |
0:d616ece2d859
|
263
|
} while (0)
|
| mbed714 |
0:d616ece2d859
|
264
|
|
| mbed714 |
0:d616ece2d859
|
265
|
#endif /* LWIP_EVENT_API */
|
| mbed714 |
0:d616ece2d859
|
266
|
|
| mbed714 |
0:d616ece2d859
|
267
|
/** Enabled extra-check for TCP_OVERSIZE if LWIP_DEBUG is enabled */
|
| mbed714 |
0:d616ece2d859
|
268
|
#if TCP_OVERSIZE && defined(LWIP_DEBUG)
|
| mbed714 |
0:d616ece2d859
|
269
|
#define TCP_OVERSIZE_DBGCHECK 1
|
| mbed714 |
0:d616ece2d859
|
270
|
#else
|
| mbed714 |
0:d616ece2d859
|
271
|
#define TCP_OVERSIZE_DBGCHECK 0
|
| mbed714 |
0:d616ece2d859
|
272
|
#endif
|
| mbed714 |
0:d616ece2d859
|
273
|
|
| mbed714 |
0:d616ece2d859
|
274
|
/** Don't generate checksum on copy if CHECKSUM_GEN_TCP is disabled */
|
| mbed714 |
0:d616ece2d859
|
275
|
#define TCP_CHECKSUM_ON_COPY (LWIP_CHECKSUM_ON_COPY && CHECKSUM_GEN_TCP)
|
| mbed714 |
0:d616ece2d859
|
276
|
|
| mbed714 |
0:d616ece2d859
|
277
|
/* This structure represents a TCP segment on the unsent, unacked and ooseq queues */
|
| mbed714 |
0:d616ece2d859
|
278
|
struct tcp_seg {
|
| mbed714 |
0:d616ece2d859
|
279
|
struct tcp_seg *next; /* used when putting segements on a queue */
|
| mbed714 |
0:d616ece2d859
|
280
|
struct pbuf *p; /* buffer containing data + TCP header */
|
| mbed714 |
0:d616ece2d859
|
281
|
void *dataptr; /* pointer to the TCP data in the pbuf */
|
| mbed714 |
0:d616ece2d859
|
282
|
u16_t len; /* the TCP length of this segment */
|
| mbed714 |
0:d616ece2d859
|
283
|
#if TCP_OVERSIZE_DBGCHECK
|
| mbed714 |
0:d616ece2d859
|
284
|
u16_t oversize_left; /* Extra bytes available at the end of the last
|
| mbed714 |
0:d616ece2d859
|
285
|
pbuf in unsent (used for asserting vs.
|
| mbed714 |
0:d616ece2d859
|
286
|
tcp_pcb.unsent_oversized only) */
|
| mbed714 |
0:d616ece2d859
|
287
|
#endif /* TCP_OVERSIZE_DBGCHECK */
|
| mbed714 |
0:d616ece2d859
|
288
|
#if TCP_CHECKSUM_ON_COPY
|
| mbed714 |
0:d616ece2d859
|
289
|
u16_t chksum;
|
| mbed714 |
0:d616ece2d859
|
290
|
u8_t chksum_swapped;
|
| mbed714 |
0:d616ece2d859
|
291
|
#endif /* TCP_CHECKSUM_ON_COPY */
|
| mbed714 |
0:d616ece2d859
|
292
|
u8_t flags;
|
| mbed714 |
0:d616ece2d859
|
293
|
#define TF_SEG_OPTS_MSS (u8_t)0x01U /* Include MSS option. */
|
| mbed714 |
0:d616ece2d859
|
294
|
#define TF_SEG_OPTS_TS (u8_t)0x02U /* Include timestamp option. */
|
| mbed714 |
0:d616ece2d859
|
295
|
#define TF_SEG_DATA_CHECKSUMMED (u8_t)0x04U /* ALL data (not the header) is
|
| mbed714 |
0:d616ece2d859
|
296
|
checksummed into 'chksum' */
|
| mbed714 |
0:d616ece2d859
|
297
|
struct tcp_hdr *tcphdr; /* the TCP header */
|
| mbed714 |
0:d616ece2d859
|
298
|
};
|
| mbed714 |
0:d616ece2d859
|
299
|
|
| mbed714 |
0:d616ece2d859
|
300
|
#define LWIP_TCP_OPT_LENGTH(flags) \
|
| mbed714 |
0:d616ece2d859
|
301
|
(flags & TF_SEG_OPTS_MSS ? 4 : 0) + \
|
| mbed714 |
0:d616ece2d859
|
302
|
(flags & TF_SEG_OPTS_TS ? 12 : 0)
|
| mbed714 |
0:d616ece2d859
|
303
|
|
| mbed714 |
0:d616ece2d859
|
304
|
/** This returns a TCP header option for MSS in an u32_t */
|
| mbed714 |
0:d616ece2d859
|
305
|
#define TCP_BUILD_MSS_OPTION(x) (x) = PP_HTONL(((u32_t)2 << 24) | \
|
| mbed714 |
0:d616ece2d859
|
306
|
((u32_t)4 << 16) | \
|
| mbed714 |
0:d616ece2d859
|
307
|
(((u32_t)TCP_MSS / 256) << 8) | \
|
| mbed714 |
0:d616ece2d859
|
308
|
(TCP_MSS & 255))
|
| mbed714 |
0:d616ece2d859
|
309
|
|
| mbed714 |
0:d616ece2d859
|
310
|
/* Global variables: */
|
| mbed714 |
0:d616ece2d859
|
311
|
extern struct tcp_pcb *tcp_input_pcb;
|
| mbed714 |
0:d616ece2d859
|
312
|
extern u32_t tcp_ticks;
|
| mbed714 |
0:d616ece2d859
|
313
|
|
| mbed714 |
0:d616ece2d859
|
314
|
/* The TCP PCB lists. */
|
| mbed714 |
0:d616ece2d859
|
315
|
union tcp_listen_pcbs_t { /* List of all TCP PCBs in LISTEN state. */
|
| mbed714 |
0:d616ece2d859
|
316
|
struct tcp_pcb_listen *listen_pcbs;
|
| mbed714 |
0:d616ece2d859
|
317
|
struct tcp_pcb *pcbs;
|
| mbed714 |
0:d616ece2d859
|
318
|
};
|
| mbed714 |
0:d616ece2d859
|
319
|
extern struct tcp_pcb *tcp_bound_pcbs;
|
| mbed714 |
0:d616ece2d859
|
320
|
extern union tcp_listen_pcbs_t tcp_listen_pcbs;
|
| mbed714 |
0:d616ece2d859
|
321
|
extern struct tcp_pcb *tcp_active_pcbs; /* List of all TCP PCBs that are in a
|
| mbed714 |
0:d616ece2d859
|
322
|
state in which they accept or send
|
| mbed714 |
0:d616ece2d859
|
323
|
data. */
|
| mbed714 |
0:d616ece2d859
|
324
|
extern struct tcp_pcb *tcp_tw_pcbs; /* List of all TCP PCBs in TIME-WAIT. */
|
| mbed714 |
0:d616ece2d859
|
325
|
|
| mbed714 |
0:d616ece2d859
|
326
|
extern struct tcp_pcb *tcp_tmp_pcb; /* Only used for temporary storage. */
|
| mbed714 |
0:d616ece2d859
|
327
|
|
| mbed714 |
0:d616ece2d859
|
328
|
/* Axioms about the above lists:
|
| mbed714 |
0:d616ece2d859
|
329
|
1) Every TCP PCB that is not CLOSED is in one of the lists.
|
| mbed714 |
0:d616ece2d859
|
330
|
2) A PCB is only in one of the lists.
|
| mbed714 |
0:d616ece2d859
|
331
|
3) All PCBs in the tcp_listen_pcbs list is in LISTEN state.
|
| mbed714 |
0:d616ece2d859
|
332
|
4) All PCBs in the tcp_tw_pcbs list is in TIME-WAIT state.
|
| mbed714 |
0:d616ece2d859
|
333
|
*/
|
| mbed714 |
0:d616ece2d859
|
334
|
/* Define two macros, TCP_REG and TCP_RMV that registers a TCP PCB
|
| mbed714 |
0:d616ece2d859
|
335
|
with a PCB list or removes a PCB from a list, respectively. */
|
| mbed714 |
0:d616ece2d859
|
336
|
#ifndef TCP_DEBUG_PCB_LISTS
|
| mbed714 |
0:d616ece2d859
|
337
|
#define TCP_DEBUG_PCB_LISTS 0
|
| mbed714 |
0:d616ece2d859
|
338
|
#endif
|
| mbed714 |
0:d616ece2d859
|
339
|
#if TCP_DEBUG_PCB_LISTS
|
| mbed714 |
0:d616ece2d859
|
340
|
#define TCP_REG(pcbs, npcb) do {\
|
| mbed714 |
0:d616ece2d859
|
341
|
LWIP_DEBUGF(TCP_DEBUG, ("TCP_REG %p local port %d\n", (npcb), (npcb)->local_port)); \
|
| mbed714 |
0:d616ece2d859
|
342
|
for(tcp_tmp_pcb = *(pcbs); \
|
| mbed714 |
0:d616ece2d859
|
343
|
tcp_tmp_pcb != NULL; \
|
| mbed714 |
0:d616ece2d859
|
344
|
tcp_tmp_pcb = tcp_tmp_pcb->next) { \
|
| mbed714 |
0:d616ece2d859
|
345
|
LWIP_ASSERT("TCP_REG: already registered\n", tcp_tmp_pcb != (npcb)); \
|
| mbed714 |
0:d616ece2d859
|
346
|
} \
|
| mbed714 |
0:d616ece2d859
|
347
|
LWIP_ASSERT("TCP_REG: pcb->state != CLOSED", ((pcbs) == &tcp_bound_pcbs) || ((npcb)->state != CLOSED)); \
|
| mbed714 |
0:d616ece2d859
|
348
|
(npcb)->next = *(pcbs); \
|
| mbed714 |
0:d616ece2d859
|
349
|
LWIP_ASSERT("TCP_REG: npcb->next != npcb", (npcb)->next != (npcb)); \
|
| mbed714 |
0:d616ece2d859
|
350
|
*(pcbs) = (npcb); \
|
| mbed714 |
0:d616ece2d859
|
351
|
LWIP_ASSERT("TCP_RMV: tcp_pcbs sane", tcp_pcbs_sane()); \
|
| mbed714 |
0:d616ece2d859
|
352
|
tcp_timer_needed(); \
|
| mbed714 |
0:d616ece2d859
|
353
|
} while(0)
|
| mbed714 |
0:d616ece2d859
|
354
|
#define TCP_RMV(pcbs, npcb) do { \
|
| mbed714 |
0:d616ece2d859
|
355
|
LWIP_ASSERT("TCP_RMV: pcbs != NULL", *(pcbs) != NULL); \
|
| mbed714 |
0:d616ece2d859
|
356
|
LWIP_DEBUGF(TCP_DEBUG, ("TCP_RMV: removing %p from %p\n", (npcb), *(pcbs))); \
|
| mbed714 |
0:d616ece2d859
|
357
|
if(*(pcbs) == (npcb)) { \
|
| mbed714 |
0:d616ece2d859
|
358
|
*(pcbs) = (*pcbs)->next; \
|
| mbed714 |
0:d616ece2d859
|
359
|
} else for(tcp_tmp_pcb = *(pcbs); tcp_tmp_pcb != NULL; tcp_tmp_pcb = tcp_tmp_pcb->next) { \
|
| mbed714 |
0:d616ece2d859
|
360
|
if(tcp_tmp_pcb->next == (npcb)) { \
|
| mbed714 |
0:d616ece2d859
|
361
|
tcp_tmp_pcb->next = (npcb)->next; \
|
| mbed714 |
0:d616ece2d859
|
362
|
break; \
|
| mbed714 |
0:d616ece2d859
|
363
|
} \
|
| mbed714 |
0:d616ece2d859
|
364
|
} \
|
| mbed714 |
0:d616ece2d859
|
365
|
(npcb)->next = NULL; \
|
| mbed714 |
0:d616ece2d859
|
366
|
LWIP_ASSERT("TCP_RMV: tcp_pcbs sane", tcp_pcbs_sane()); \
|
| mbed714 |
0:d616ece2d859
|
367
|
LWIP_DEBUGF(TCP_DEBUG, ("TCP_RMV: removed %p from %p\n", (npcb), *(pcbs))); \
|
| mbed714 |
0:d616ece2d859
|
368
|
} while(0)
|
| mbed714 |
0:d616ece2d859
|
369
|
|
| mbed714 |
0:d616ece2d859
|
370
|
#else /* LWIP_DEBUG */
|
| mbed714 |
0:d616ece2d859
|
371
|
|
| mbed714 |
0:d616ece2d859
|
372
|
#define TCP_REG(pcbs, npcb) \
|
| mbed714 |
0:d616ece2d859
|
373
|
do { \
|
| mbed714 |
0:d616ece2d859
|
374
|
(npcb)->next = *pcbs; \
|
| mbed714 |
0:d616ece2d859
|
375
|
*(pcbs) = (npcb); \
|
| mbed714 |
0:d616ece2d859
|
376
|
tcp_timer_needed(); \
|
| mbed714 |
0:d616ece2d859
|
377
|
} while (0)
|
| mbed714 |
0:d616ece2d859
|
378
|
|
| mbed714 |
0:d616ece2d859
|
379
|
#define TCP_RMV(pcbs, npcb) \
|
| mbed714 |
0:d616ece2d859
|
380
|
do { \
|
| mbed714 |
0:d616ece2d859
|
381
|
if(*(pcbs) == (npcb)) { \
|
| mbed714 |
0:d616ece2d859
|
382
|
(*(pcbs)) = (*pcbs)->next; \
|
| mbed714 |
0:d616ece2d859
|
383
|
} \
|
| mbed714 |
0:d616ece2d859
|
384
|
else { \
|
| mbed714 |
0:d616ece2d859
|
385
|
for(tcp_tmp_pcb = *pcbs; \
|
| mbed714 |
0:d616ece2d859
|
386
|
tcp_tmp_pcb != NULL; \
|
| mbed714 |
0:d616ece2d859
|
387
|
tcp_tmp_pcb = tcp_tmp_pcb->next) { \
|
| mbed714 |
0:d616ece2d859
|
388
|
if(tcp_tmp_pcb->next == (npcb)) { \
|
| mbed714 |
0:d616ece2d859
|
389
|
tcp_tmp_pcb->next = (npcb)->next; \
|
| mbed714 |
0:d616ece2d859
|
390
|
break; \
|
| mbed714 |
0:d616ece2d859
|
391
|
} \
|
| mbed714 |
0:d616ece2d859
|
392
|
} \
|
| mbed714 |
0:d616ece2d859
|
393
|
} \
|
| mbed714 |
0:d616ece2d859
|
394
|
(npcb)->next = NULL; \
|
| mbed714 |
0:d616ece2d859
|
395
|
} while(0)
|
| mbed714 |
0:d616ece2d859
|
396
|
|
| mbed714 |
0:d616ece2d859
|
397
|
#endif /* LWIP_DEBUG */
|
| mbed714 |
0:d616ece2d859
|
398
|
|
| mbed714 |
0:d616ece2d859
|
399
|
|
| mbed714 |
0:d616ece2d859
|
400
|
/* Internal functions: */
|
| mbed714 |
0:d616ece2d859
|
401
|
struct tcp_pcb *tcp_pcb_copy(struct tcp_pcb *pcb);
|
| mbed714 |
0:d616ece2d859
|
402
|
void tcp_pcb_purge(struct tcp_pcb *pcb);
|
| mbed714 |
0:d616ece2d859
|
403
|
void tcp_pcb_remove(struct tcp_pcb **pcblist, struct tcp_pcb *pcb);
|
| mbed714 |
0:d616ece2d859
|
404
|
|
| mbed714 |
0:d616ece2d859
|
405
|
void tcp_segs_free(struct tcp_seg *seg);
|
| mbed714 |
0:d616ece2d859
|
406
|
void tcp_seg_free(struct tcp_seg *seg);
|
| mbed714 |
0:d616ece2d859
|
407
|
struct tcp_seg *tcp_seg_copy(struct tcp_seg *seg);
|
| mbed714 |
0:d616ece2d859
|
408
|
|
| mbed714 |
0:d616ece2d859
|
409
|
#define tcp_ack(pcb) \
|
| mbed714 |
0:d616ece2d859
|
410
|
do { \
|
| mbed714 |
0:d616ece2d859
|
411
|
if((pcb)->flags & TF_ACK_DELAY) { \
|
| mbed714 |
0:d616ece2d859
|
412
|
(pcb)->flags &= ~TF_ACK_DELAY; \
|
| mbed714 |
0:d616ece2d859
|
413
|
(pcb)->flags |= TF_ACK_NOW; \
|
| mbed714 |
0:d616ece2d859
|
414
|
} \
|
| mbed714 |
0:d616ece2d859
|
415
|
else { \
|
| mbed714 |
0:d616ece2d859
|
416
|
(pcb)->flags |= TF_ACK_DELAY; \
|
| mbed714 |
0:d616ece2d859
|
417
|
} \
|
| mbed714 |
0:d616ece2d859
|
418
|
} while (0)
|
| mbed714 |
0:d616ece2d859
|
419
|
|
| mbed714 |
0:d616ece2d859
|
420
|
#define tcp_ack_now(pcb) \
|
| mbed714 |
0:d616ece2d859
|
421
|
do { \
|
| mbed714 |
0:d616ece2d859
|
422
|
(pcb)->flags |= TF_ACK_NOW; \
|
| mbed714 |
0:d616ece2d859
|
423
|
} while (0)
|
| mbed714 |
0:d616ece2d859
|
424
|
|
| mbed714 |
0:d616ece2d859
|
425
|
err_t tcp_send_fin(struct tcp_pcb *pcb);
|
| mbed714 |
0:d616ece2d859
|
426
|
err_t tcp_enqueue_flags(struct tcp_pcb *pcb, u8_t flags);
|
| mbed714 |
0:d616ece2d859
|
427
|
|
| mbed714 |
0:d616ece2d859
|
428
|
void tcp_rexmit_seg(struct tcp_pcb *pcb, struct tcp_seg *seg);
|
| mbed714 |
0:d616ece2d859
|
429
|
|
| mbed714 |
0:d616ece2d859
|
430
|
void tcp_rst(u32_t seqno, u32_t ackno,
|
| mbed714 |
0:d616ece2d859
|
431
|
ip_addr_t *local_ip, ip_addr_t *remote_ip,
|
| mbed714 |
0:d616ece2d859
|
432
|
u16_t local_port, u16_t remote_port);
|
| mbed714 |
0:d616ece2d859
|
433
|
|
| mbed714 |
0:d616ece2d859
|
434
|
u32_t tcp_next_iss(void);
|
| mbed714 |
0:d616ece2d859
|
435
|
|
| mbed714 |
0:d616ece2d859
|
436
|
void tcp_keepalive(struct tcp_pcb *pcb);
|
| mbed714 |
0:d616ece2d859
|
437
|
void tcp_zero_window_probe(struct tcp_pcb *pcb);
|
| mbed714 |
0:d616ece2d859
|
438
|
|
| mbed714 |
0:d616ece2d859
|
439
|
#if TCP_CALCULATE_EFF_SEND_MSS
|
| mbed714 |
0:d616ece2d859
|
440
|
u16_t tcp_eff_send_mss(u16_t sendmss, ip_addr_t *addr);
|
| mbed714 |
0:d616ece2d859
|
441
|
#endif /* TCP_CALCULATE_EFF_SEND_MSS */
|
| mbed714 |
0:d616ece2d859
|
442
|
|
| mbed714 |
0:d616ece2d859
|
443
|
#if LWIP_CALLBACK_API
|
| mbed714 |
0:d616ece2d859
|
444
|
err_t tcp_recv_null(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err);
|
| mbed714 |
0:d616ece2d859
|
445
|
#endif /* LWIP_CALLBACK_API */
|
| mbed714 |
0:d616ece2d859
|
446
|
|
| mbed714 |
0:d616ece2d859
|
447
|
#if TCP_DEBUG || TCP_INPUT_DEBUG || TCP_OUTPUT_DEBUG
|
| mbed714 |
0:d616ece2d859
|
448
|
void tcp_debug_print(struct tcp_hdr *tcphdr);
|
| mbed714 |
0:d616ece2d859
|
449
|
void tcp_debug_print_flags(u8_t flags);
|
| mbed714 |
0:d616ece2d859
|
450
|
void tcp_debug_print_state(enum tcp_state s);
|
| mbed714 |
0:d616ece2d859
|
451
|
void tcp_debug_print_pcbs(void);
|
| mbed714 |
0:d616ece2d859
|
452
|
s16_t tcp_pcbs_sane(void);
|
| mbed714 |
0:d616ece2d859
|
453
|
#else
|
| mbed714 |
0:d616ece2d859
|
454
|
# define tcp_debug_print(tcphdr)
|
| mbed714 |
0:d616ece2d859
|
455
|
# define tcp_debug_print_flags(flags)
|
| mbed714 |
0:d616ece2d859
|
456
|
# define tcp_debug_print_state(s)
|
| mbed714 |
0:d616ece2d859
|
457
|
# define tcp_debug_print_pcbs()
|
| mbed714 |
0:d616ece2d859
|
458
|
# define tcp_pcbs_sane() 1
|
| mbed714 |
0:d616ece2d859
|
459
|
#endif /* TCP_DEBUG */
|
| mbed714 |
0:d616ece2d859
|
460
|
|
| mbed714 |
0:d616ece2d859
|
461
|
/** External function (implemented in timers.c), called when TCP detects
|
| mbed714 |
0:d616ece2d859
|
462
|
* that a timer is needed (i.e. active- or time-wait-pcb found). */
|
| mbed714 |
0:d616ece2d859
|
463
|
void tcp_timer_needed(void);
|
| mbed714 |
0:d616ece2d859
|
464
|
|
| mbed714 |
0:d616ece2d859
|
465
|
|
| mbed714 |
0:d616ece2d859
|
466
|
#ifdef __cplusplus
|
| mbed714 |
0:d616ece2d859
|
467
|
}
|
| mbed714 |
0:d616ece2d859
|
468
|
#endif
|
| mbed714 |
0:d616ece2d859
|
469
|
|
| mbed714 |
0:d616ece2d859
|
470
|
#endif /* LWIP_TCP */
|
| mbed714 |
0:d616ece2d859
|
471
|
|
| mbed714 |
0:d616ece2d859
|
472
|
#endif /* __LWIP_TCP_H__ */
|
Daniel Peter