32#ifndef __LWIP_TCP_IMPL_H__
33#define __LWIP_TCP_IMPL_H__
59void tcp_slowtmr (
void);
60void tcp_fasttmr (
void);
64void tcp_input (
struct pbuf *p,
struct netif *inp);
66struct tcp_pcb * tcp_alloc (
u8_t prio);
67void tcp_abandon (
struct tcp_pcb *pcb,
int reset);
68err_t tcp_send_empty_ack(
struct tcp_pcb *pcb);
69void tcp_rexmit (
struct tcp_pcb *pcb);
70void tcp_rexmit_rto (
struct tcp_pcb *pcb);
71void tcp_rexmit_fast (
struct tcp_pcb *pcb);
72u32_t tcp_update_rcv_ann_wnd(
struct tcp_pcb *pcb);
73err_t tcp_process_refused_data(
struct tcp_pcb *pcb);
84#define tcp_do_output_nagle(tpcb) ((((tpcb)->unacked == NULL) || \
85 ((tpcb)->flags & (TF_NODELAY | TF_INFR)) || \
86 (((tpcb)->unsent != NULL) && (((tpcb)->unsent->next != NULL) || \
87 ((tpcb)->unsent->len >= (tpcb)->mss))) || \
88 ((tcp_sndbuf(tpcb) == 0) || (tcp_sndqueuelen(tpcb) >= TCP_SND_QUEUELEN)) \
90#define tcp_output_nagle(tpcb) (tcp_do_output_nagle(tpcb) ? tcp_output(tpcb) : ERR_OK)
93#define TCP_SEQ_LT(a,b) ((s32_t)((u32_t)(a) - (u32_t)(b)) < 0)
94#define TCP_SEQ_LEQ(a,b) ((s32_t)((u32_t)(a) - (u32_t)(b)) <= 0)
95#define TCP_SEQ_GT(a,b) ((s32_t)((u32_t)(a) - (u32_t)(b)) > 0)
96#define TCP_SEQ_GEQ(a,b) ((s32_t)((u32_t)(a) - (u32_t)(b)) >= 0)
99#define TCP_SEQ_BETWEEN(a,b,c) ((c)-(b) >= (a)-(b))
101#define TCP_SEQ_BETWEEN(a,b,c) (TCP_SEQ_GEQ(a,b) && TCP_SEQ_LEQ(a,c))
111#define TCP_FLAGS 0x3fU
116#ifndef TCP_TMR_INTERVAL
117#define TCP_TMR_INTERVAL 250
120#ifndef TCP_FAST_INTERVAL
121#define TCP_FAST_INTERVAL TCP_TMR_INTERVAL
124#ifndef TCP_SLOW_INTERVAL
125#define TCP_SLOW_INTERVAL (2*TCP_TMR_INTERVAL)
128#define TCP_FIN_WAIT_TIMEOUT 20000
129#define TCP_SYN_RCVD_TIMEOUT 20000
131#define TCP_OOSEQ_TIMEOUT 6U
134#define TCP_MSL 60000UL
138#ifndef TCP_KEEPIDLE_DEFAULT
139#define TCP_KEEPIDLE_DEFAULT 7200000UL
142#ifndef TCP_KEEPINTVL_DEFAULT
143#define TCP_KEEPINTVL_DEFAULT 75000UL
146#ifndef TCP_KEEPCNT_DEFAULT
147#define TCP_KEEPCNT_DEFAULT 9U
150#define TCP_MAXIDLE TCP_KEEPCNT_DEFAULT * TCP_KEEPINTVL_DEFAULT
155#ifdef PACK_STRUCT_USE_INCLUDES
156# include "arch/bpstruct.h"
170#ifdef PACK_STRUCT_USE_INCLUDES
171# include "arch/epstruct.h"
174#define TCPH_HDRLEN(phdr) (ntohs((phdr)->_hdrlen_rsvd_flags) >> 12)
175#define TCPH_FLAGS(phdr) (ntohs((phdr)->_hdrlen_rsvd_flags) & TCP_FLAGS)
177#define TCPH_HDRLEN_SET(phdr, len) (phdr)->_hdrlen_rsvd_flags = htons(((len) << 12) | TCPH_FLAGS(phdr))
178#define TCPH_FLAGS_SET(phdr, flags) (phdr)->_hdrlen_rsvd_flags = (((phdr)->_hdrlen_rsvd_flags & PP_HTONS((u16_t)(~(u16_t)(TCP_FLAGS)))) | htons(flags))
179#define TCPH_HDRLEN_FLAGS_SET(phdr, len, flags) (phdr)->_hdrlen_rsvd_flags = htons(((len) << 12) | (flags))
181#define TCPH_SET_FLAG(phdr, flags ) (phdr)->_hdrlen_rsvd_flags = ((phdr)->_hdrlen_rsvd_flags | htons(flags))
182#define TCPH_UNSET_FLAG(phdr, flags) (phdr)->_hdrlen_rsvd_flags = htons(ntohs((phdr)->_hdrlen_rsvd_flags) | (TCPH_FLAGS(phdr) & ~(flags)) )
184#define TCP_TCPLEN(seg) ((seg)->len + ((TCPH_FLAGS((seg)->tcphdr) & (TCP_FIN | TCP_SYN)) != 0))
188#define TF_RESET (u8_t)0x08U
189#define TF_CLOSED (u8_t)0x10U
190#define TF_GOT_FIN (u8_t)0x20U
195#define TCP_EVENT_ACCEPT(pcb,err,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\
196 LWIP_EVENT_ACCEPT, NULL, 0, err)
197#define TCP_EVENT_SENT(pcb,space,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\
198 LWIP_EVENT_SENT, NULL, space, ERR_OK)
199#define TCP_EVENT_RECV(pcb,p,err,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\
200 LWIP_EVENT_RECV, (p), 0, (err))
201#define TCP_EVENT_CLOSED(pcb,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\
202 LWIP_EVENT_RECV, NULL, 0, ERR_OK)
203#define TCP_EVENT_CONNECTED(pcb,err,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\
204 LWIP_EVENT_CONNECTED, NULL, 0, (err))
205#define TCP_EVENT_POLL(pcb,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\
206 LWIP_EVENT_POLL, NULL, 0, ERR_OK)
207#define TCP_EVENT_ERR(errf,arg,err) lwip_tcp_event((arg), NULL, \
208 LWIP_EVENT_ERR, NULL, 0, (err))
212#define TCP_EVENT_ACCEPT(pcb,err,ret) \
214 if((pcb)->accept != NULL) \
215 (ret) = (pcb)->accept((pcb)->callback_arg,(pcb),(err)); \
216 else (ret) = ERR_ARG; \
219#define TCP_EVENT_SENT(pcb,space,ret) \
221 if((pcb)->sent != NULL) \
222 (ret) = (pcb)->sent((pcb)->callback_arg,(pcb),(space)); \
223 else (ret) = ERR_OK; \
226#define TCP_EVENT_RECV(pcb,p,err,ret) \
228 if((pcb)->recv != NULL) { \
229 (ret) = (pcb)->recv((pcb)->callback_arg,(pcb),(p),(err));\
231 (ret) = tcp_recv_null(NULL, (pcb), (p), (err)); \
235#define TCP_EVENT_CLOSED(pcb,ret) \
237 if(((pcb)->recv != NULL)) { \
238 (ret) = (pcb)->recv((pcb)->callback_arg,(pcb),NULL,ERR_OK);\
244#define TCP_EVENT_CONNECTED(pcb,err,ret) \
246 if((pcb)->connected != NULL) \
247 (ret) = (pcb)->connected((pcb)->callback_arg,(pcb),(err)); \
248 else (ret) = ERR_OK; \
251#define TCP_EVENT_POLL(pcb,ret) \
253 if((pcb)->poll != NULL) \
254 (ret) = (pcb)->poll((pcb)->callback_arg,(pcb)); \
255 else (ret) = ERR_OK; \
258#define TCP_EVENT_ERR(errf,arg,err) \
261 (errf)((arg),(err)); \
267#if TCP_OVERSIZE && defined(LWIP_DEBUG)
268#define TCP_OVERSIZE_DBGCHECK 1
270#define TCP_OVERSIZE_DBGCHECK 0
274#define TCP_CHECKSUM_ON_COPY (LWIP_CHECKSUM_ON_COPY && CHECKSUM_GEN_TCP)
278 struct tcp_seg *
next;
281#if TCP_OVERSIZE_DBGCHECK
286#if TCP_CHECKSUM_ON_COPY
291#define TF_SEG_OPTS_MSS (u8_t)0x01U
292#define TF_SEG_OPTS_TS (u8_t)0x02U
293#define TF_SEG_DATA_CHECKSUMMED (u8_t)0x04U
298#define LWIP_TCP_OPT_LENGTH(flags) \
299 (flags & TF_SEG_OPTS_MSS ? 4 : 0) + \
300 (flags & TF_SEG_OPTS_TS ? 12 : 0)
303#define TCP_BUILD_MSS_OPTION(mss) htonl(0x02040000 | ((mss) & 0xFFFF))
306extern struct tcp_pcb *tcp_input_pcb;
307extern u32_t tcp_ticks;
308extern u8_t tcp_active_pcbs_changed;
311union tcp_listen_pcbs_t {
312 struct tcp_pcb_listen *listen_pcbs;
313 struct tcp_pcb *pcbs;
315extern struct tcp_pcb *tcp_bound_pcbs;
316extern union tcp_listen_pcbs_t tcp_listen_pcbs;
317extern struct tcp_pcb *tcp_active_pcbs;
320extern struct tcp_pcb *tcp_tw_pcbs;
322extern struct tcp_pcb *tcp_tmp_pcb;
332#ifndef TCP_DEBUG_PCB_LISTS
333#define TCP_DEBUG_PCB_LISTS 0
335#if TCP_DEBUG_PCB_LISTS
336#define TCP_REG(pcbs, npcb) do {\
337 LWIP_DEBUGF(TCP_DEBUG, ("TCP_REG %p local port %d\n", (npcb), (npcb)->local_port)); \
338 for(tcp_tmp_pcb = *(pcbs); \
339 tcp_tmp_pcb != NULL; \
340 tcp_tmp_pcb = tcp_tmp_pcb->next) { \
341 LWIP_ASSERT("TCP_REG: already registered\n", tcp_tmp_pcb != (npcb)); \
343 LWIP_ASSERT("TCP_REG: pcb->state != CLOSED", ((pcbs) == &tcp_bound_pcbs) || ((npcb)->state != CLOSED)); \
344 (npcb)->next = *(pcbs); \
345 LWIP_ASSERT("TCP_REG: npcb->next != npcb", (npcb)->next != (npcb)); \
347 LWIP_ASSERT("TCP_RMV: tcp_pcbs sane", tcp_pcbs_sane()); \
348 tcp_timer_needed(); \
350#define TCP_RMV(pcbs, npcb) do { \
351 LWIP_ASSERT("TCP_RMV: pcbs != NULL", *(pcbs) != NULL); \
352 LWIP_DEBUGF(TCP_DEBUG, ("TCP_RMV: removing %p from %p\n", (npcb), *(pcbs))); \
353 if(*(pcbs) == (npcb)) { \
354 *(pcbs) = (*pcbs)->next; \
355 } else for(tcp_tmp_pcb = *(pcbs); tcp_tmp_pcb != NULL; tcp_tmp_pcb = tcp_tmp_pcb->next) { \
356 if(tcp_tmp_pcb->next == (npcb)) { \
357 tcp_tmp_pcb->next = (npcb)->next; \
361 (npcb)->next = NULL; \
362 LWIP_ASSERT("TCP_RMV: tcp_pcbs sane", tcp_pcbs_sane()); \
363 LWIP_DEBUGF(TCP_DEBUG, ("TCP_RMV: removed %p from %p\n", (npcb), *(pcbs))); \
368#define TCP_REG(pcbs, npcb) \
370 (npcb)->next = *pcbs; \
372 tcp_timer_needed(); \
375#define TCP_RMV(pcbs, npcb) \
377 if(*(pcbs) == (npcb)) { \
378 (*(pcbs)) = (*pcbs)->next; \
381 for(tcp_tmp_pcb = *pcbs; \
382 tcp_tmp_pcb != NULL; \
383 tcp_tmp_pcb = tcp_tmp_pcb->next) { \
384 if(tcp_tmp_pcb->next == (npcb)) { \
385 tcp_tmp_pcb->next = (npcb)->next; \
390 (npcb)->next = NULL; \
395#define TCP_REG_ACTIVE(npcb) \
397 TCP_REG(&tcp_active_pcbs, npcb); \
398 tcp_active_pcbs_changed = 1; \
401#define TCP_RMV_ACTIVE(npcb) \
403 TCP_RMV(&tcp_active_pcbs, npcb); \
404 tcp_active_pcbs_changed = 1; \
407#define TCP_PCB_REMOVE_ACTIVE(pcb) \
409 tcp_pcb_remove(&tcp_active_pcbs, pcb); \
410 tcp_active_pcbs_changed = 1; \
415struct tcp_pcb *tcp_pcb_copy(
struct tcp_pcb *pcb);
416void tcp_pcb_purge(
struct tcp_pcb *pcb);
417void tcp_pcb_remove(
struct tcp_pcb **pcblist,
struct tcp_pcb *pcb);
419void tcp_segs_free(
struct tcp_seg *seg);
420void tcp_seg_free(
struct tcp_seg *seg);
421struct tcp_seg *tcp_seg_copy(
struct tcp_seg *seg);
423#define tcp_ack(pcb) \
425 if((pcb)->flags & TF_ACK_DELAY) { \
426 (pcb)->flags &= ~TF_ACK_DELAY; \
427 (pcb)->flags |= TF_ACK_NOW; \
430 (pcb)->flags |= TF_ACK_DELAY; \
434#define tcp_ack_now(pcb) \
436 (pcb)->flags |= TF_ACK_NOW; \
439err_t tcp_send_fin(
struct tcp_pcb *pcb);
440err_t tcp_enqueue_flags(
struct tcp_pcb *pcb,
u8_t flags);
442void tcp_rexmit_seg(
struct tcp_pcb *pcb,
struct tcp_seg *seg);
448u32_t tcp_next_iss(
void);
450void tcp_keepalive(
struct tcp_pcb *pcb);
451void tcp_zero_window_probe(
struct tcp_pcb *pcb);
453#if TCP_CALCULATE_EFF_SEND_MSS
458err_t tcp_recv_null(
void *arg,
struct tcp_pcb *pcb,
struct pbuf *p,
err_t err);
461#if TCP_DEBUG || TCP_INPUT_DEBUG || TCP_OUTPUT_DEBUG
462void tcp_debug_print(
struct tcp_hdr *
tcphdr);
463void tcp_debug_print_flags(
u8_t flags);
464void tcp_debug_print_state(
enum tcp_state s);
465void tcp_debug_print_pcbs(
void);
466s16_t tcp_pcbs_sane(
void);
468# define tcp_debug_print(tcphdr)
469# define tcp_debug_print_flags(flags)
470# define tcp_debug_print_state(s)
471# define tcp_debug_print_pcbs()
472# define tcp_pcbs_sane() 1
#define PACK_STRUCT_BEGIN
#define PACK_STRUCT_FIELD(x)
#define PACK_STRUCT_STRUCT
typedefPACK_STRUCT_END struct ip_addr ip_addr_t
void tcp_timer_needed(void)