Ethernet for Nucleo and Disco board STM32F746 works with gcc and arm. IAC is untested
Dependents: STM32F746_iothub_client_sample_mqtt DISCO-F746NG_Ethernet Nucleo_F746ZG_Ethernet thethingsiO-DISCO_F746NG-mqtt ... more
tcp_impl.h
00001 /* 00002 * Copyright (c) 2001-2004 Swedish Institute of Computer Science. 00003 * All rights reserved. 00004 * 00005 * Redistribution and use in source and binary forms, with or without modification, 00006 * are permitted provided that the following conditions are met: 00007 * 00008 * 1. Redistributions of source code must retain the above copyright notice, 00009 * this list of conditions and the following disclaimer. 00010 * 2. Redistributions in binary form must reproduce the above copyright notice, 00011 * this list of conditions and the following disclaimer in the documentation 00012 * and/or other materials provided with the distribution. 00013 * 3. The name of the author may not be used to endorse or promote products 00014 * derived from this software without specific prior written permission. 00015 * 00016 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 00017 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 00018 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 00019 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 00020 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 00021 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 00022 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 00023 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 00024 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 00025 * OF SUCH DAMAGE. 00026 * 00027 * This file is part of the lwIP TCP/IP stack. 00028 * 00029 * Author: Adam Dunkels <adam@sics.se> 00030 * 00031 */ 00032 #ifndef __LWIP_TCP_IMPL_H__ 00033 #define __LWIP_TCP_IMPL_H__ 00034 00035 #include "lwip/opt.h" 00036 00037 #if LWIP_TCP /* don't build if not configured for use in lwipopts.h */ 00038 00039 #include "lwip/tcp.h" 00040 #include "lwip/mem.h" 00041 #include "lwip/pbuf.h" 00042 #include "lwip/ip.h" 00043 #include "lwip/icmp.h" 00044 #include "lwip/err.h" 00045 00046 #ifdef __cplusplus 00047 extern "C" { 00048 #endif 00049 00050 /* Functions for interfacing with TCP: */ 00051 00052 /* Lower layer interface to TCP: */ 00053 void tcp_init (void); /* Initialize this module. */ 00054 void tcp_tmr (void); /* Must be called every 00055 TCP_TMR_INTERVAL 00056 ms. (Typically 250 ms). */ 00057 /* It is also possible to call these two functions at the right 00058 intervals (instead of calling tcp_tmr()). */ 00059 void tcp_slowtmr (void); 00060 void tcp_fasttmr (void); 00061 00062 00063 /* Only used by IP to pass a TCP segment to TCP: */ 00064 void tcp_input (struct pbuf *p, struct netif *inp); 00065 /* Used within the TCP code only: */ 00066 struct tcp_pcb * tcp_alloc (u8_t prio); 00067 void tcp_abandon (struct tcp_pcb *pcb, int reset); 00068 err_t tcp_send_empty_ack(struct tcp_pcb *pcb); 00069 void tcp_rexmit (struct tcp_pcb *pcb); 00070 void tcp_rexmit_rto (struct tcp_pcb *pcb); 00071 void tcp_rexmit_fast (struct tcp_pcb *pcb); 00072 u32_t tcp_update_rcv_ann_wnd(struct tcp_pcb *pcb); 00073 err_t tcp_process_refused_data(struct tcp_pcb *pcb); 00074 00075 /** 00076 * This is the Nagle algorithm: try to combine user data to send as few TCP 00077 * segments as possible. Only send if 00078 * - no previously transmitted data on the connection remains unacknowledged or 00079 * - the TF_NODELAY flag is set (nagle algorithm turned off for this pcb) or 00080 * - the only unsent segment is at least pcb->mss bytes long (or there is more 00081 * than one unsent segment - with lwIP, this can happen although unsent->len < mss) 00082 * - or if we are in fast-retransmit (TF_INFR) 00083 */ 00084 #define tcp_do_output_nagle(tpcb) ((((tpcb)->unacked == NULL) || \ 00085 ((tpcb)->flags & (TF_NODELAY | TF_INFR)) || \ 00086 (((tpcb)->unsent != NULL) && (((tpcb)->unsent->next != NULL) || \ 00087 ((tpcb)->unsent->len >= (tpcb)->mss))) || \ 00088 ((tcp_sndbuf(tpcb) == 0) || (tcp_sndqueuelen(tpcb) >= TCP_SND_QUEUELEN)) \ 00089 ) ? 1 : 0) 00090 #define tcp_output_nagle(tpcb) (tcp_do_output_nagle(tpcb) ? tcp_output(tpcb) : ERR_OK) 00091 00092 00093 #define TCP_SEQ_LT(a,b) ((s32_t)((u32_t)(a) - (u32_t)(b)) < 0) 00094 #define TCP_SEQ_LEQ(a,b) ((s32_t)((u32_t)(a) - (u32_t)(b)) <= 0) 00095 #define TCP_SEQ_GT(a,b) ((s32_t)((u32_t)(a) - (u32_t)(b)) > 0) 00096 #define TCP_SEQ_GEQ(a,b) ((s32_t)((u32_t)(a) - (u32_t)(b)) >= 0) 00097 /* is b<=a<=c? */ 00098 #if 0 /* see bug #10548 */ 00099 #define TCP_SEQ_BETWEEN(a,b,c) ((c)-(b) >= (a)-(b)) 00100 #endif 00101 #define TCP_SEQ_BETWEEN(a,b,c) (TCP_SEQ_GEQ(a,b) && TCP_SEQ_LEQ(a,c)) 00102 #define TCP_FIN 0x01U 00103 #define TCP_SYN 0x02U 00104 #define TCP_RST 0x04U 00105 #define TCP_PSH 0x08U 00106 #define TCP_ACK 0x10U 00107 #define TCP_URG 0x20U 00108 #define TCP_ECE 0x40U 00109 #define TCP_CWR 0x80U 00110 00111 #define TCP_FLAGS 0x3fU 00112 00113 /* Length of the TCP header, excluding options. */ 00114 #define TCP_HLEN 20 00115 00116 #ifndef TCP_TMR_INTERVAL 00117 #define TCP_TMR_INTERVAL 250 /* The TCP timer interval in milliseconds. */ 00118 #endif /* TCP_TMR_INTERVAL */ 00119 00120 #ifndef TCP_FAST_INTERVAL 00121 #define TCP_FAST_INTERVAL TCP_TMR_INTERVAL /* the fine grained timeout in milliseconds */ 00122 #endif /* TCP_FAST_INTERVAL */ 00123 00124 #ifndef TCP_SLOW_INTERVAL 00125 #define TCP_SLOW_INTERVAL (2*TCP_TMR_INTERVAL) /* the coarse grained timeout in milliseconds */ 00126 #endif /* TCP_SLOW_INTERVAL */ 00127 00128 #define TCP_FIN_WAIT_TIMEOUT 20000 /* milliseconds */ 00129 #define TCP_SYN_RCVD_TIMEOUT 20000 /* milliseconds */ 00130 00131 #define TCP_OOSEQ_TIMEOUT 6U /* x RTO */ 00132 00133 #ifndef TCP_MSL 00134 #define TCP_MSL 60000UL /* The maximum segment lifetime in milliseconds */ 00135 #endif 00136 00137 /* Keepalive values, compliant with RFC 1122. Don't change this unless you know what you're doing */ 00138 #ifndef TCP_KEEPIDLE_DEFAULT 00139 #define TCP_KEEPIDLE_DEFAULT 7200000UL /* Default KEEPALIVE timer in milliseconds */ 00140 #endif 00141 00142 #ifndef TCP_KEEPINTVL_DEFAULT 00143 #define TCP_KEEPINTVL_DEFAULT 75000UL /* Default Time between KEEPALIVE probes in milliseconds */ 00144 #endif 00145 00146 #ifndef TCP_KEEPCNT_DEFAULT 00147 #define TCP_KEEPCNT_DEFAULT 9U /* Default Counter for KEEPALIVE probes */ 00148 #endif 00149 00150 #define TCP_MAXIDLE TCP_KEEPCNT_DEFAULT * TCP_KEEPINTVL_DEFAULT /* Maximum KEEPALIVE probe time */ 00151 00152 /* Fields are (of course) in network byte order. 00153 * Some fields are converted to host byte order in tcp_input(). 00154 */ 00155 #ifdef PACK_STRUCT_USE_INCLUDES 00156 # include "arch/bpstruct.h" 00157 #endif 00158 PACK_STRUCT_BEGIN 00159 struct tcp_hdr { 00160 PACK_STRUCT_FIELD(u16_t src); 00161 PACK_STRUCT_FIELD(u16_t dest); 00162 PACK_STRUCT_FIELD(u32_t seqno); 00163 PACK_STRUCT_FIELD(u32_t ackno); 00164 PACK_STRUCT_FIELD(u16_t _hdrlen_rsvd_flags); 00165 PACK_STRUCT_FIELD(u16_t wnd); 00166 PACK_STRUCT_FIELD(u16_t chksum); 00167 PACK_STRUCT_FIELD(u16_t urgp); 00168 } PACK_STRUCT_STRUCT; 00169 PACK_STRUCT_END 00170 #ifdef PACK_STRUCT_USE_INCLUDES 00171 # include "arch/epstruct.h" 00172 #endif 00173 00174 #define TCPH_HDRLEN(phdr) (ntohs((phdr)->_hdrlen_rsvd_flags) >> 12) 00175 #define TCPH_FLAGS(phdr) (ntohs((phdr)->_hdrlen_rsvd_flags) & TCP_FLAGS) 00176 00177 #define TCPH_HDRLEN_SET(phdr, len) (phdr)->_hdrlen_rsvd_flags = htons(((len) << 12) | TCPH_FLAGS(phdr)) 00178 #define TCPH_FLAGS_SET(phdr, flags) (phdr)->_hdrlen_rsvd_flags = (((phdr)->_hdrlen_rsvd_flags & PP_HTONS((u16_t)(~(u16_t)(TCP_FLAGS)))) | htons(flags)) 00179 #define TCPH_HDRLEN_FLAGS_SET(phdr, len, flags) (phdr)->_hdrlen_rsvd_flags = htons(((len) << 12) | (flags)) 00180 00181 #define TCPH_SET_FLAG(phdr, flags ) (phdr)->_hdrlen_rsvd_flags = ((phdr)->_hdrlen_rsvd_flags | htons(flags)) 00182 #define TCPH_UNSET_FLAG(phdr, flags) (phdr)->_hdrlen_rsvd_flags = htons(ntohs((phdr)->_hdrlen_rsvd_flags) | (TCPH_FLAGS(phdr) & ~(flags)) ) 00183 00184 #define TCP_TCPLEN(seg) ((seg)->len + ((TCPH_FLAGS((seg)->tcphdr) & (TCP_FIN | TCP_SYN)) != 0)) 00185 00186 /** Flags used on input processing, not on pcb->flags 00187 */ 00188 #define TF_RESET (u8_t)0x08U /* Connection was reset. */ 00189 #define TF_CLOSED (u8_t)0x10U /* Connection was sucessfully closed. */ 00190 #define TF_GOT_FIN (u8_t)0x20U /* Connection was closed by the remote end. */ 00191 00192 00193 #if LWIP_EVENT_API 00194 00195 #define TCP_EVENT_ACCEPT(pcb,err,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\ 00196 LWIP_EVENT_ACCEPT, NULL, 0, err) 00197 #define TCP_EVENT_SENT(pcb,space,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\ 00198 LWIP_EVENT_SENT, NULL, space, ERR_OK) 00199 #define TCP_EVENT_RECV(pcb,p,err,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\ 00200 LWIP_EVENT_RECV, (p), 0, (err)) 00201 #define TCP_EVENT_CLOSED(pcb,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\ 00202 LWIP_EVENT_RECV, NULL, 0, ERR_OK) 00203 #define TCP_EVENT_CONNECTED(pcb,err,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\ 00204 LWIP_EVENT_CONNECTED, NULL, 0, (err)) 00205 #define TCP_EVENT_POLL(pcb,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\ 00206 LWIP_EVENT_POLL, NULL, 0, ERR_OK) 00207 #define TCP_EVENT_ERR(errf,arg,err) lwip_tcp_event((arg), NULL, \ 00208 LWIP_EVENT_ERR, NULL, 0, (err)) 00209 00210 #else /* LWIP_EVENT_API */ 00211 00212 #define TCP_EVENT_ACCEPT(pcb,err,ret) \ 00213 do { \ 00214 if((pcb)->accept != NULL) \ 00215 (ret) = (pcb)->accept((pcb)->callback_arg,(pcb),(err)); \ 00216 else (ret) = ERR_ARG; \ 00217 } while (0) 00218 00219 #define TCP_EVENT_SENT(pcb,space,ret) \ 00220 do { \ 00221 if((pcb)->sent != NULL) \ 00222 (ret) = (pcb)->sent((pcb)->callback_arg,(pcb),(space)); \ 00223 else (ret) = ERR_OK; \ 00224 } while (0) 00225 00226 #define TCP_EVENT_RECV(pcb,p,err,ret) \ 00227 do { \ 00228 if((pcb)->recv != NULL) { \ 00229 (ret) = (pcb)->recv((pcb)->callback_arg,(pcb),(p),(err));\ 00230 } else { \ 00231 (ret) = tcp_recv_null(NULL, (pcb), (p), (err)); \ 00232 } \ 00233 } while (0) 00234 00235 #define TCP_EVENT_CLOSED(pcb,ret) \ 00236 do { \ 00237 if(((pcb)->recv != NULL)) { \ 00238 (ret) = (pcb)->recv((pcb)->callback_arg,(pcb),NULL,ERR_OK);\ 00239 } else { \ 00240 (ret) = ERR_OK; \ 00241 } \ 00242 } while (0) 00243 00244 #define TCP_EVENT_CONNECTED(pcb,err,ret) \ 00245 do { \ 00246 if((pcb)->connected != NULL) \ 00247 (ret) = (pcb)->connected((pcb)->callback_arg,(pcb),(err)); \ 00248 else (ret) = ERR_OK; \ 00249 } while (0) 00250 00251 #define TCP_EVENT_POLL(pcb,ret) \ 00252 do { \ 00253 if((pcb)->poll != NULL) \ 00254 (ret) = (pcb)->poll((pcb)->callback_arg,(pcb)); \ 00255 else (ret) = ERR_OK; \ 00256 } while (0) 00257 00258 #define TCP_EVENT_ERR(errf,arg,err) \ 00259 do { \ 00260 if((errf) != NULL) \ 00261 (errf)((arg),(err)); \ 00262 } while (0) 00263 00264 #endif /* LWIP_EVENT_API */ 00265 00266 /** Enabled extra-check for TCP_OVERSIZE if LWIP_DEBUG is enabled */ 00267 #if TCP_OVERSIZE && defined(LWIP_DEBUG) 00268 #define TCP_OVERSIZE_DBGCHECK 1 00269 #else 00270 #define TCP_OVERSIZE_DBGCHECK 0 00271 #endif 00272 00273 /** Don't generate checksum on copy if CHECKSUM_GEN_TCP is disabled */ 00274 #define TCP_CHECKSUM_ON_COPY (LWIP_CHECKSUM_ON_COPY && CHECKSUM_GEN_TCP) 00275 00276 /* This structure represents a TCP segment on the unsent, unacked and ooseq queues */ 00277 struct tcp_seg { 00278 struct tcp_seg *next; /* used when putting segements on a queue */ 00279 struct pbuf *p; /* buffer containing data + TCP header */ 00280 u16_t len; /* the TCP length of this segment */ 00281 #if TCP_OVERSIZE_DBGCHECK 00282 u16_t oversize_left; /* Extra bytes available at the end of the last 00283 pbuf in unsent (used for asserting vs. 00284 tcp_pcb.unsent_oversized only) */ 00285 #endif /* TCP_OVERSIZE_DBGCHECK */ 00286 #if TCP_CHECKSUM_ON_COPY 00287 u16_t chksum; 00288 u8_t chksum_swapped; 00289 #endif /* TCP_CHECKSUM_ON_COPY */ 00290 u8_t flags; 00291 #define TF_SEG_OPTS_MSS (u8_t)0x01U /* Include MSS option. */ 00292 #define TF_SEG_OPTS_TS (u8_t)0x02U /* Include timestamp option. */ 00293 #define TF_SEG_DATA_CHECKSUMMED (u8_t)0x04U /* ALL data (not the header) is 00294 checksummed into 'chksum' */ 00295 struct tcp_hdr *tcphdr; /* the TCP header */ 00296 }; 00297 00298 #define LWIP_TCP_OPT_LENGTH(flags) \ 00299 (flags & TF_SEG_OPTS_MSS ? 4 : 0) + \ 00300 (flags & TF_SEG_OPTS_TS ? 12 : 0) 00301 00302 /** This returns a TCP header option for MSS in an u32_t */ 00303 #define TCP_BUILD_MSS_OPTION(mss) htonl(0x02040000 | ((mss) & 0xFFFF)) 00304 00305 /* Global variables: */ 00306 extern struct tcp_pcb *tcp_input_pcb; 00307 extern u32_t tcp_ticks; 00308 extern u8_t tcp_active_pcbs_changed; 00309 00310 /* The TCP PCB lists. */ 00311 union tcp_listen_pcbs_t { /* List of all TCP PCBs in LISTEN state. */ 00312 struct tcp_pcb_listen *listen_pcbs; 00313 struct tcp_pcb *pcbs; 00314 }; 00315 extern struct tcp_pcb *tcp_bound_pcbs; 00316 extern union tcp_listen_pcbs_t tcp_listen_pcbs; 00317 extern struct tcp_pcb *tcp_active_pcbs; /* List of all TCP PCBs that are in a 00318 state in which they accept or send 00319 data. */ 00320 extern struct tcp_pcb *tcp_tw_pcbs; /* List of all TCP PCBs in TIME-WAIT. */ 00321 00322 extern struct tcp_pcb *tcp_tmp_pcb; /* Only used for temporary storage. */ 00323 00324 /* Axioms about the above lists: 00325 1) Every TCP PCB that is not CLOSED is in one of the lists. 00326 2) A PCB is only in one of the lists. 00327 3) All PCBs in the tcp_listen_pcbs list is in LISTEN state. 00328 4) All PCBs in the tcp_tw_pcbs list is in TIME-WAIT state. 00329 */ 00330 /* Define two macros, TCP_REG and TCP_RMV that registers a TCP PCB 00331 with a PCB list or removes a PCB from a list, respectively. */ 00332 #ifndef TCP_DEBUG_PCB_LISTS 00333 #define TCP_DEBUG_PCB_LISTS 0 00334 #endif 00335 #if TCP_DEBUG_PCB_LISTS 00336 #define TCP_REG(pcbs, npcb) do {\ 00337 LWIP_DEBUGF(TCP_DEBUG, ("TCP_REG %p local port %d\n", (npcb), (npcb)->local_port)); \ 00338 for(tcp_tmp_pcb = *(pcbs); \ 00339 tcp_tmp_pcb != NULL; \ 00340 tcp_tmp_pcb = tcp_tmp_pcb->next) { \ 00341 LWIP_ASSERT("TCP_REG: already registered\n", tcp_tmp_pcb != (npcb)); \ 00342 } \ 00343 LWIP_ASSERT("TCP_REG: pcb->state != CLOSED", ((pcbs) == &tcp_bound_pcbs) || ((npcb)->state != CLOSED)); \ 00344 (npcb)->next = *(pcbs); \ 00345 LWIP_ASSERT("TCP_REG: npcb->next != npcb", (npcb)->next != (npcb)); \ 00346 *(pcbs) = (npcb); \ 00347 LWIP_ASSERT("TCP_RMV: tcp_pcbs sane", tcp_pcbs_sane()); \ 00348 tcp_timer_needed(); \ 00349 } while(0) 00350 #define TCP_RMV(pcbs, npcb) do { \ 00351 LWIP_ASSERT("TCP_RMV: pcbs != NULL", *(pcbs) != NULL); \ 00352 LWIP_DEBUGF(TCP_DEBUG, ("TCP_RMV: removing %p from %p\n", (npcb), *(pcbs))); \ 00353 if(*(pcbs) == (npcb)) { \ 00354 *(pcbs) = (*pcbs)->next; \ 00355 } else for(tcp_tmp_pcb = *(pcbs); tcp_tmp_pcb != NULL; tcp_tmp_pcb = tcp_tmp_pcb->next) { \ 00356 if(tcp_tmp_pcb->next == (npcb)) { \ 00357 tcp_tmp_pcb->next = (npcb)->next; \ 00358 break; \ 00359 } \ 00360 } \ 00361 (npcb)->next = NULL; \ 00362 LWIP_ASSERT("TCP_RMV: tcp_pcbs sane", tcp_pcbs_sane()); \ 00363 LWIP_DEBUGF(TCP_DEBUG, ("TCP_RMV: removed %p from %p\n", (npcb), *(pcbs))); \ 00364 } while(0) 00365 00366 #else /* LWIP_DEBUG */ 00367 00368 #define TCP_REG(pcbs, npcb) \ 00369 do { \ 00370 (npcb)->next = *pcbs; \ 00371 *(pcbs) = (npcb); \ 00372 tcp_timer_needed(); \ 00373 } while (0) 00374 00375 #define TCP_RMV(pcbs, npcb) \ 00376 do { \ 00377 if(*(pcbs) == (npcb)) { \ 00378 (*(pcbs)) = (*pcbs)->next; \ 00379 } \ 00380 else { \ 00381 for(tcp_tmp_pcb = *pcbs; \ 00382 tcp_tmp_pcb != NULL; \ 00383 tcp_tmp_pcb = tcp_tmp_pcb->next) { \ 00384 if(tcp_tmp_pcb->next == (npcb)) { \ 00385 tcp_tmp_pcb->next = (npcb)->next; \ 00386 break; \ 00387 } \ 00388 } \ 00389 } \ 00390 (npcb)->next = NULL; \ 00391 } while(0) 00392 00393 #endif /* LWIP_DEBUG */ 00394 00395 #define TCP_REG_ACTIVE(npcb) \ 00396 do { \ 00397 TCP_REG(&tcp_active_pcbs, npcb); \ 00398 tcp_active_pcbs_changed = 1; \ 00399 } while (0) 00400 00401 #define TCP_RMV_ACTIVE(npcb) \ 00402 do { \ 00403 TCP_RMV(&tcp_active_pcbs, npcb); \ 00404 tcp_active_pcbs_changed = 1; \ 00405 } while (0) 00406 00407 #define TCP_PCB_REMOVE_ACTIVE(pcb) \ 00408 do { \ 00409 tcp_pcb_remove(&tcp_active_pcbs, pcb); \ 00410 tcp_active_pcbs_changed = 1; \ 00411 } while (0) 00412 00413 00414 /* Internal functions: */ 00415 struct tcp_pcb *tcp_pcb_copy(struct tcp_pcb *pcb); 00416 void tcp_pcb_purge(struct tcp_pcb *pcb); 00417 void tcp_pcb_remove(struct tcp_pcb **pcblist, struct tcp_pcb *pcb); 00418 00419 void tcp_segs_free(struct tcp_seg *seg); 00420 void tcp_seg_free(struct tcp_seg *seg); 00421 struct tcp_seg *tcp_seg_copy(struct tcp_seg *seg); 00422 00423 #define tcp_ack(pcb) \ 00424 do { \ 00425 if((pcb)->flags & TF_ACK_DELAY) { \ 00426 (pcb)->flags &= ~TF_ACK_DELAY; \ 00427 (pcb)->flags |= TF_ACK_NOW; \ 00428 } \ 00429 else { \ 00430 (pcb)->flags |= TF_ACK_DELAY; \ 00431 } \ 00432 } while (0) 00433 00434 #define tcp_ack_now(pcb) \ 00435 do { \ 00436 (pcb)->flags |= TF_ACK_NOW; \ 00437 } while (0) 00438 00439 err_t tcp_send_fin(struct tcp_pcb *pcb); 00440 err_t tcp_enqueue_flags(struct tcp_pcb *pcb, u8_t flags); 00441 00442 void tcp_rexmit_seg(struct tcp_pcb *pcb, struct tcp_seg *seg); 00443 00444 void tcp_rst(u32_t seqno, u32_t ackno, 00445 ip_addr_t *local_ip, ip_addr_t *remote_ip, 00446 u16_t local_port, u16_t remote_port); 00447 00448 u32_t tcp_next_iss(void); 00449 00450 void tcp_keepalive(struct tcp_pcb *pcb); 00451 void tcp_zero_window_probe(struct tcp_pcb *pcb); 00452 00453 #if TCP_CALCULATE_EFF_SEND_MSS 00454 u16_t tcp_eff_send_mss(u16_t sendmss, ip_addr_t *addr); 00455 #endif /* TCP_CALCULATE_EFF_SEND_MSS */ 00456 00457 #if LWIP_CALLBACK_API 00458 err_t tcp_recv_null(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err); 00459 #endif /* LWIP_CALLBACK_API */ 00460 00461 #if TCP_DEBUG || TCP_INPUT_DEBUG || TCP_OUTPUT_DEBUG 00462 void tcp_debug_print(struct tcp_hdr *tcphdr); 00463 void tcp_debug_print_flags(u8_t flags); 00464 void tcp_debug_print_state(enum tcp_state s); 00465 void tcp_debug_print_pcbs(void); 00466 s16_t tcp_pcbs_sane(void); 00467 #else 00468 # define tcp_debug_print(tcphdr) 00469 # define tcp_debug_print_flags(flags) 00470 # define tcp_debug_print_state(s) 00471 # define tcp_debug_print_pcbs() 00472 # define tcp_pcbs_sane() 1 00473 #endif /* TCP_DEBUG */ 00474 00475 /** External function (implemented in timers.c), called when TCP detects 00476 * that a timer is needed (i.e. active- or time-wait-pcb found). */ 00477 void tcp_timer_needed(void); 00478 00479 00480 #ifdef __cplusplus 00481 } 00482 #endif 00483 00484 #endif /* LWIP_TCP */ 00485 00486 #endif /* __LWIP_TCP_H__ */
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