/* | |
* 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_TCP_H__ | |
#define __LWIP_TCP_H__ | |
#include "lwip/sys.h" | |
#include "lwip/mem.h" | |
#include "lwip/pbuf.h" | |
#include "lwip/opt.h" | |
#include "lwip/ip.h" | |
#include "lwip/icmp.h" | |
#include "lwip/err.h" | |
struct tcp_pcb; | |
/* Functions for interfacing with TCP: */ | |
/* Lower layer interface to TCP: */ | |
void tcp_init (void); /* Must be called first to | |
initialize TCP. */ | |
void tcp_tmr (void); /* Must be called every | |
TCP_TMR_INTERVAL | |
ms. (Typically 250 ms). */ | |
/* Application program's interface: */ | |
struct tcp_pcb * tcp_new (void); | |
struct tcp_pcb * tcp_alloc (u8_t prio); | |
void tcp_arg (struct tcp_pcb *pcb, void *arg); | |
void tcp_accept (struct tcp_pcb *pcb, | |
err_t (* accept)(void *arg, struct tcp_pcb *newpcb, | |
err_t err)); | |
void tcp_recv (struct tcp_pcb *pcb, | |
err_t (* recv)(void *arg, struct tcp_pcb *tpcb, | |
struct pbuf *p, err_t err)); | |
void tcp_sent (struct tcp_pcb *pcb, | |
err_t (* sent)(void *arg, struct tcp_pcb *tpcb, | |
u16_t len)); | |
void tcp_poll (struct tcp_pcb *pcb, | |
err_t (* poll)(void *arg, struct tcp_pcb *tpcb), | |
u8_t interval); | |
void tcp_err (struct tcp_pcb *pcb, | |
void (* err)(void *arg, err_t err)); | |
#define tcp_mss(pcb) ((pcb)->mss) | |
#define tcp_sndbuf(pcb) ((pcb)->snd_buf) | |
void tcp_recved (struct tcp_pcb *pcb, u16_t len); | |
err_t tcp_bind (struct tcp_pcb *pcb, struct ip_addr *ipaddr, | |
u16_t port); | |
err_t tcp_connect (struct tcp_pcb *pcb, struct ip_addr *ipaddr, | |
u16_t port, err_t (* connected)(void *arg, | |
struct tcp_pcb *tpcb, | |
err_t err)); | |
struct tcp_pcb * tcp_listen (struct tcp_pcb *pcb); | |
void tcp_abort (struct tcp_pcb *pcb); | |
err_t tcp_close (struct tcp_pcb *pcb); | |
err_t tcp_write (struct tcp_pcb *pcb, const void *dataptr, u16_t len, | |
u8_t copy); | |
void tcp_setprio (struct tcp_pcb *pcb, u8_t prio); | |
#define TCP_PRIO_MIN 1 | |
#define TCP_PRIO_NORMAL 64 | |
#define TCP_PRIO_MAX 127 | |
/* It is also possible to call these two functions at the right | |
intervals (instead of calling tcp_tmr()). */ | |
void tcp_slowtmr (void); | |
void tcp_fasttmr (void); | |
/* Only used by IP to pass a TCP segment to TCP: */ | |
void tcp_input (struct pbuf *p, struct netif *inp); | |
/* Used within the TCP code only: */ | |
err_t tcp_output (struct tcp_pcb *pcb); | |
void tcp_rexmit (struct tcp_pcb *pcb); | |
void tcp_rexmit_rto (struct tcp_pcb *pcb); | |
#define TCP_SEQ_LT(a,b) ((s32_t)((a)-(b)) < 0) | |
#define TCP_SEQ_LEQ(a,b) ((s32_t)((a)-(b)) <= 0) | |
#define TCP_SEQ_GT(a,b) ((s32_t)((a)-(b)) > 0) | |
#define TCP_SEQ_GEQ(a,b) ((s32_t)((a)-(b)) >= 0) | |
/* is b<=a<=c? */ | |
#if 0 /* see bug #10548 */ | |
#define TCP_SEQ_BETWEEN(a,b,c) ((c)-(b) >= (a)-(b)) | |
#endif | |
#define TCP_SEQ_BETWEEN(a,b,c) (TCP_SEQ_GEQ(a,b) && TCP_SEQ_LEQ(a,c)) | |
#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 | |
#define TCP_FLAGS 0x3fU | |
/* Length of the TCP header, excluding options. */ | |
#define TCP_HLEN 20 | |
#ifndef TCP_TMR_INTERVAL | |
#define TCP_TMR_INTERVAL 250 /* The TCP timer interval in | |
milliseconds. */ | |
#endif /* TCP_TMR_INTERVAL */ | |
#ifndef TCP_FAST_INTERVAL | |
#define TCP_FAST_INTERVAL TCP_TMR_INTERVAL /* the fine grained timeout in | |
milliseconds */ | |
#endif /* TCP_FAST_INTERVAL */ | |
#ifndef TCP_SLOW_INTERVAL | |
#define TCP_SLOW_INTERVAL (2*TCP_TMR_INTERVAL) /* the coarse grained timeout in | |
milliseconds */ | |
#endif /* TCP_SLOW_INTERVAL */ | |
#define TCP_FIN_WAIT_TIMEOUT 20000 /* milliseconds */ | |
#define TCP_SYN_RCVD_TIMEOUT 20000 /* milliseconds */ | |
#define TCP_OOSEQ_TIMEOUT 6U /* x RTO */ | |
#define TCP_MSL 60000 /* The maximum segment lifetime in microseconds */ | |
/* | |
* User-settable options (used with setsockopt). | |
*/ | |
#define TCP_NODELAY 0x01 /* don't delay send to coalesce packets */ | |
#define TCP_KEEPALIVE 0x02 /* send KEEPALIVE probes when idle for pcb->keepalive miliseconds */ | |
/* Keepalive values */ | |
#define TCP_KEEPDEFAULT 7200000 /* KEEPALIVE timer in miliseconds */ | |
#define TCP_KEEPINTVL 75000 /* Time between KEEPALIVE probes in miliseconds */ | |
#define TCP_KEEPCNT 9 /* Counter for KEEPALIVE probes */ | |
#define TCP_MAXIDLE TCP_KEEPCNT * TCP_KEEPINTVL /* Maximum KEEPALIVE probe time */ | |
#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 | |
#define TCPH_OFFSET(phdr) (ntohs((phdr)->_hdrlen_rsvd_flags) >> 8) | |
#define TCPH_HDRLEN(phdr) (ntohs((phdr)->_hdrlen_rsvd_flags) >> 12) | |
#define TCPH_FLAGS(phdr) (ntohs((phdr)->_hdrlen_rsvd_flags) & TCP_FLAGS) | |
#define TCPH_OFFSET_SET(phdr, offset) (phdr)->_hdrlen_rsvd_flags = htons(((offset) << 8) | TCPH_FLAGS(phdr)) | |
#define TCPH_HDRLEN_SET(phdr, len) (phdr)->_hdrlen_rsvd_flags = htons(((len) << 12) | TCPH_FLAGS(phdr)) | |
#define TCPH_FLAGS_SET(phdr, flags) (phdr)->_hdrlen_rsvd_flags = htons((ntohs((phdr)->_hdrlen_rsvd_flags) & ~TCP_FLAGS) | (flags)) | |
#define TCPH_SET_FLAG(phdr, flags ) (phdr)->_hdrlen_rsvd_flags = htons(ntohs((phdr)->_hdrlen_rsvd_flags) | (flags)) | |
#define TCPH_UNSET_FLAG(phdr, flags) (phdr)->_hdrlen_rsvd_flags = htons(ntohs((phdr)->_hdrlen_rsvd_flags) | (TCPH_FLAGS(phdr) & ~(flags)) ) | |
#define TCP_TCPLEN(seg) ((seg)->len + ((TCPH_FLAGS((seg)->tcphdr) & TCP_FIN || \ | |
TCPH_FLAGS((seg)->tcphdr) & TCP_SYN)? 1: 0)) | |
enum tcp_state { | |
CLOSED = 0, | |
LISTEN = 1, | |
SYN_SENT = 2, | |
SYN_RCVD = 3, | |
ESTABLISHED = 4, | |
FIN_WAIT_1 = 5, | |
FIN_WAIT_2 = 6, | |
CLOSE_WAIT = 7, | |
CLOSING = 8, | |
LAST_ACK = 9, | |
TIME_WAIT = 10 | |
}; | |
/* the TCP protocol control block */ | |
struct tcp_pcb { | |
/** common PCB members */ | |
IP_PCB; | |
/** protocol specific PCB members */ | |
struct tcp_pcb *next; /* for the linked list */ | |
enum tcp_state state; /* TCP state */ | |
u8_t prio; | |
void *callback_arg; | |
u16_t local_port; | |
u16_t remote_port; | |
u8_t flags; | |
#define TF_ACK_DELAY (u8_t)0x01U /* Delayed ACK. */ | |
#define TF_ACK_NOW (u8_t)0x02U /* Immediate ACK. */ | |
#define TF_INFR (u8_t)0x04U /* In fast recovery. */ | |
#define TF_RESET (u8_t)0x08U /* Connection was reset. */ | |
#define TF_CLOSED (u8_t)0x10U /* Connection was sucessfully closed. */ | |
#define TF_GOT_FIN (u8_t)0x20U /* Connection was closed by the remote end. */ | |
#define TF_NODELAY (u8_t)0x40U /* Disable Nagle algorithm */ | |
/* receiver variables */ | |
u32_t rcv_nxt; /* next seqno expected */ | |
u16_t rcv_wnd; /* receiver window */ | |
/* Timers */ | |
u32_t tmr; | |
u8_t polltmr, pollinterval; | |
/* Retransmission timer. */ | |
u16_t rtime; | |
u16_t mss; /* maximum segment size */ | |
/* RTT (round trip time) estimation variables */ | |
u32_t rttest; /* RTT estimate in 500ms ticks */ | |
u32_t rtseq; /* sequence number being timed */ | |
s16_t sa, sv; /* @todo document this */ | |
u16_t rto; /* retransmission time-out */ | |
u8_t nrtx; /* number of retransmissions */ | |
/* fast retransmit/recovery */ | |
u32_t lastack; /* Highest acknowledged seqno. */ | |
u8_t dupacks; | |
/* congestion avoidance/control variables */ | |
u16_t cwnd; | |
u16_t ssthresh; | |
/* sender variables */ | |
u32_t snd_nxt, /* next seqno to be sent */ | |
snd_max, /* Highest seqno sent. */ | |
snd_wnd, /* sender window */ | |
snd_wl1, snd_wl2, /* Sequence and acknowledgement numbers of last | |
window update. */ | |
snd_lbb; /* Sequence number of next byte to be buffered. */ | |
u16_t acked; | |
u16_t snd_buf; /* Available buffer space for sending (in bytes). */ | |
u8_t snd_queuelen; /* Available buffer space for sending (in tcp_segs). */ | |
/* These are ordered by sequence number: */ | |
struct tcp_seg *unsent; /* Unsent (queued) segments. */ | |
struct tcp_seg *unacked; /* Sent but unacknowledged segments. */ | |
#if TCP_QUEUE_OOSEQ | |
struct tcp_seg *ooseq; /* Received out of sequence segments. */ | |
#endif /* TCP_QUEUE_OOSEQ */ | |
#if LWIP_CALLBACK_API | |
/* Function to be called when more send buffer space is available. */ | |
err_t (* sent)(void *arg, struct tcp_pcb *pcb, u16_t space); | |
/* Function to be called when (in-sequence) data has arrived. */ | |
err_t (* recv)(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err); | |
/* Function to be called when a connection has been set up. */ | |
err_t (* connected)(void *arg, struct tcp_pcb *pcb, err_t err); | |
/* Function to call when a listener has been connected. */ | |
err_t (* accept)(void *arg, struct tcp_pcb *newpcb, err_t err); | |
/* Function which is called periodically. */ | |
err_t (* poll)(void *arg, struct tcp_pcb *pcb); | |
/* Function to be called whenever a fatal error occurs. */ | |
void (* errf)(void *arg, err_t err); | |
#endif /* LWIP_CALLBACK_API */ | |
/* idle time before KEEPALIVE is sent */ | |
u32_t keepalive; | |
/* KEEPALIVE counter */ | |
u8_t keep_cnt; | |
}; | |
struct tcp_pcb_listen { | |
/* Common members of all PCB types */ | |
IP_PCB; | |
/* Protocol specific PCB members */ | |
struct tcp_pcb_listen *next; /* for the linked list */ | |
/* Even if state is obviously LISTEN this is here for | |
* field compatibility with tpc_pcb to which it is cast sometimes | |
* Until a cleaner solution emerges this is here.FIXME | |
*/ | |
enum tcp_state state; /* TCP state */ | |
u8_t prio; | |
void *callback_arg; | |
u16_t local_port; | |
#if LWIP_CALLBACK_API | |
/* Function to call when a listener has been connected. */ | |
err_t (* accept)(void *arg, struct tcp_pcb *newpcb, err_t err); | |
#endif /* LWIP_CALLBACK_API */ | |
}; | |
#if LWIP_EVENT_API | |
enum lwip_event { | |
LWIP_EVENT_ACCEPT, | |
LWIP_EVENT_SENT, | |
LWIP_EVENT_RECV, | |
LWIP_EVENT_CONNECTED, | |
LWIP_EVENT_POLL, | |
LWIP_EVENT_ERR | |
}; | |
err_t lwip_tcp_event(void *arg, struct tcp_pcb *pcb, | |
enum lwip_event, | |
struct pbuf *p, | |
u16_t size, | |
err_t err); | |
#define TCP_EVENT_ACCEPT(pcb,err,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\ | |
LWIP_EVENT_ACCEPT, NULL, 0, err) | |
#define TCP_EVENT_SENT(pcb,space,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\ | |
LWIP_EVENT_SENT, NULL, space, ERR_OK) | |
#define TCP_EVENT_RECV(pcb,p,err,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\ | |
LWIP_EVENT_RECV, (p), 0, (err)) | |
#define TCP_EVENT_CONNECTED(pcb,err,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\ | |
LWIP_EVENT_CONNECTED, NULL, 0, (err)) | |
#define TCP_EVENT_POLL(pcb,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\ | |
LWIP_EVENT_POLL, NULL, 0, ERR_OK) | |
#define TCP_EVENT_ERR(errf,arg,err) lwip_tcp_event((arg), NULL, \ | |
LWIP_EVENT_ERR, NULL, 0, (err)) | |
#else /* LWIP_EVENT_API */ | |
#define TCP_EVENT_ACCEPT(pcb,err,ret) \ | |
if((pcb)->accept != NULL) \ | |
(ret = (pcb)->accept((pcb)->callback_arg,(pcb),(err))) | |
#define TCP_EVENT_SENT(pcb,space,ret) \ | |
if((pcb)->sent != NULL) \ | |
(ret = (pcb)->sent((pcb)->callback_arg,(pcb),(space))) | |
#define TCP_EVENT_RECV(pcb,p,err,ret) \ | |
if((pcb)->recv != NULL) \ | |
{ ret = (pcb)->recv((pcb)->callback_arg,(pcb),(p),(err)); } else { \ | |
if (p) pbuf_free(p); } | |
#define TCP_EVENT_CONNECTED(pcb,err,ret) \ | |
if((pcb)->connected != NULL) \ | |
(ret = (pcb)->connected((pcb)->callback_arg,(pcb),(err))) | |
#define TCP_EVENT_POLL(pcb,ret) \ | |
if((pcb)->poll != NULL) \ | |
(ret = (pcb)->poll((pcb)->callback_arg,(pcb))) | |
#define TCP_EVENT_ERR(errf,arg,err) \ | |
if((errf) != NULL) \ | |
(errf)((arg),(err)) | |
#endif /* LWIP_EVENT_API */ | |
/* This structure represents a TCP segment on the unsent and unacked queues */ | |
struct tcp_seg { | |
struct tcp_seg *next; /* used when putting segements on a queue */ | |
struct pbuf *p; /* buffer containing data + TCP header */ | |
void *dataptr; /* pointer to the TCP data in the pbuf */ | |
u16_t len; /* the TCP length of this segment */ | |
struct tcp_hdr *tcphdr; /* the TCP header */ | |
}; | |
/* Internal functions and global variables: */ | |
struct tcp_pcb *tcp_pcb_copy(struct tcp_pcb *pcb); | |
void tcp_pcb_purge(struct tcp_pcb *pcb); | |
void tcp_pcb_remove(struct tcp_pcb **pcblist, struct tcp_pcb *pcb); | |
u8_t tcp_segs_free(struct tcp_seg *seg); | |
u8_t tcp_seg_free(struct tcp_seg *seg); | |
struct tcp_seg *tcp_seg_copy(struct tcp_seg *seg); | |
#define tcp_ack(pcb) if((pcb)->flags & TF_ACK_DELAY) { \ | |
(pcb)->flags &= ~TF_ACK_DELAY; \ | |
(pcb)->flags |= TF_ACK_NOW; \ | |
tcp_output(pcb); \ | |
} else { \ | |
(pcb)->flags |= TF_ACK_DELAY; \ | |
} | |
#define tcp_ack_now(pcb) (pcb)->flags |= TF_ACK_NOW; \ | |
tcp_output(pcb) | |
err_t tcp_send_ctrl(struct tcp_pcb *pcb, u8_t flags); | |
err_t tcp_enqueue(struct tcp_pcb *pcb, void *dataptr, u16_t len, | |
u8_t flags, u8_t copy, | |
u8_t *optdata, u8_t optlen); | |
void tcp_rexmit_seg(struct tcp_pcb *pcb, struct tcp_seg *seg); | |
void tcp_rst(u32_t seqno, u32_t ackno, | |
struct ip_addr *local_ip, struct ip_addr *remote_ip, | |
u16_t local_port, u16_t remote_port); | |
u32_t tcp_next_iss(void); | |
void tcp_keepalive(struct tcp_pcb *pcb); | |
extern struct tcp_pcb *tcp_input_pcb; | |
extern u32_t tcp_ticks; | |
#if TCP_DEBUG || TCP_INPUT_DEBUG || TCP_OUTPUT_DEBUG | |
void tcp_debug_print(struct tcp_hdr *tcphdr); | |
void tcp_debug_print_flags(u8_t flags); | |
void tcp_debug_print_state(enum tcp_state s); | |
void tcp_debug_print_pcbs(void); | |
s16_t tcp_pcbs_sane(void); | |
#else | |
# define tcp_debug_print(tcphdr) | |
# define tcp_debug_print_flags(flags) | |
# define tcp_debug_print_state(s) | |
# define tcp_debug_print_pcbs() | |
# define tcp_pcbs_sane() 1 | |
#endif /* TCP_DEBUG */ | |
#if NO_SYS | |
#define tcp_timer_needed() | |
#else | |
void tcp_timer_needed(void); | |
#endif | |
/* The TCP PCB lists. */ | |
union tcp_listen_pcbs_t { /* List of all TCP PCBs in LISTEN state. */ | |
struct tcp_pcb_listen *listen_pcbs; | |
struct tcp_pcb *pcbs; | |
}; | |
extern union tcp_listen_pcbs_t tcp_listen_pcbs; | |
extern struct tcp_pcb *tcp_active_pcbs; /* List of all TCP PCBs that are in a | |
state in which they accept or send | |
data. */ | |
extern struct tcp_pcb *tcp_tw_pcbs; /* List of all TCP PCBs in TIME-WAIT. */ | |
extern struct tcp_pcb *tcp_tmp_pcb; /* Only used for temporary storage. */ | |
/* Axioms about the above lists: | |
1) Every TCP PCB that is not CLOSED is in one of the lists. | |
2) A PCB is only in one of the lists. | |
3) All PCBs in the tcp_listen_pcbs list is in LISTEN state. | |
4) All PCBs in the tcp_tw_pcbs list is in TIME-WAIT state. | |
*/ | |
/* Define two macros, TCP_REG and TCP_RMV that registers a TCP PCB | |
with a PCB list or removes a PCB from a list, respectively. */ | |
#if 0 | |
#define TCP_REG(pcbs, npcb) do {\ | |
LWIP_DEBUGF(TCP_DEBUG, ("TCP_REG %p local port %d\n", npcb, npcb->local_port)); \ | |
for(tcp_tmp_pcb = *pcbs; \ | |
tcp_tmp_pcb != NULL; \ | |
tcp_tmp_pcb = tcp_tmp_pcb->next) { \ | |
LWIP_ASSERT("TCP_REG: already registered\n", tcp_tmp_pcb != npcb); \ | |
} \ | |
LWIP_ASSERT("TCP_REG: pcb->state != CLOSED", npcb->state != CLOSED); \ | |
npcb->next = *pcbs; \ | |
LWIP_ASSERT("TCP_REG: npcb->next != npcb", npcb->next != npcb); \ | |
*(pcbs) = npcb; \ | |
LWIP_ASSERT("TCP_RMV: tcp_pcbs sane", tcp_pcbs_sane()); \ | |
tcp_timer_needed(); \ | |
} while(0) | |
#define TCP_RMV(pcbs, npcb) do { \ | |
LWIP_ASSERT("TCP_RMV: pcbs != NULL", *pcbs != NULL); \ | |
LWIP_DEBUGF(TCP_DEBUG, ("TCP_RMV: removing %p from %p\n", npcb, *pcbs)); \ | |
if(*pcbs == npcb) { \ | |
*pcbs = (*pcbs)->next; \ | |
} else for(tcp_tmp_pcb = *pcbs; tcp_tmp_pcb != NULL; tcp_tmp_pcb = tcp_tmp_pcb->next) { \ | |
if(tcp_tmp_pcb->next != NULL && tcp_tmp_pcb->next == npcb) { \ | |
tcp_tmp_pcb->next = npcb->next; \ | |
break; \ | |
} \ | |
} \ | |
npcb->next = NULL; \ | |
LWIP_ASSERT("TCP_RMV: tcp_pcbs sane", tcp_pcbs_sane()); \ | |
LWIP_DEBUGF(TCP_DEBUG, ("TCP_RMV: removed %p from %p\n", npcb, *pcbs)); \ | |
} while(0) | |
#else /* LWIP_DEBUG */ | |
#define TCP_REG(pcbs, npcb) do { \ | |
npcb->next = *pcbs; \ | |
*(pcbs) = npcb; \ | |
tcp_timer_needed(); \ | |
} while(0) | |
#define TCP_RMV(pcbs, npcb) do { \ | |
if(*(pcbs) == npcb) { \ | |
(*(pcbs)) = (*pcbs)->next; \ | |
} else for(tcp_tmp_pcb = *pcbs; tcp_tmp_pcb != NULL; tcp_tmp_pcb = tcp_tmp_pcb->next) { \ | |
if(tcp_tmp_pcb->next != NULL && tcp_tmp_pcb->next == npcb) { \ | |
tcp_tmp_pcb->next = npcb->next; \ | |
break; \ | |
} \ | |
} \ | |
npcb->next = NULL; \ | |
} while(0) | |
#endif /* LWIP_DEBUG */ | |
#endif /* __LWIP_TCP_H__ */ | |