ReactOS  0.4.15-dev-439-g292f67a
tcp_impl.h
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1 /*
2  * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without modification,
6  * are permitted provided that the following conditions are met:
7  *
8  * 1. Redistributions of source code must retain the above copyright notice,
9  * this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright notice,
11  * this list of conditions and the following disclaimer in the documentation
12  * and/or other materials provided with the distribution.
13  * 3. The name of the author may not be used to endorse or promote products
14  * derived from this software without specific prior written permission.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
19  * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
21  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
22  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
23  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
24  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
25  * OF SUCH DAMAGE.
26  *
27  * This file is part of the lwIP TCP/IP stack.
28  *
29  * Author: Adam Dunkels <adam@sics.se>
30  *
31  */
32 #ifndef __LWIP_TCP_IMPL_H__
33 #define __LWIP_TCP_IMPL_H__
34 
35 #include "lwip/opt.h"
36 
37 #if LWIP_TCP /* don't build if not configured for use in lwipopts.h */
38 
39 #include "lwip/tcp.h"
40 #include "lwip/mem.h"
41 #include "lwip/pbuf.h"
42 #include "lwip/ip.h"
43 #include "lwip/icmp.h"
44 #include "lwip/err.h"
45 
46 #ifdef __cplusplus
47 extern "C" {
48 #endif
49 
50 /* Functions for interfacing with TCP: */
51 
52 /* Lower layer interface to TCP: */
53 void tcp_init (void); /* Initialize this module. */
54 void tcp_tmr (void); /* Must be called every
55  TCP_TMR_INTERVAL
56  ms. (Typically 250 ms). */
57 /* It is also possible to call these two functions at the right
58  intervals (instead of calling tcp_tmr()). */
59 void tcp_slowtmr (void);
60 void tcp_fasttmr (void);
61 
62 
63 /* Only used by IP to pass a TCP segment to TCP: */
64 void tcp_input (struct pbuf *p, struct netif *inp);
65 /* Used within the TCP code only: */
66 struct tcp_pcb * tcp_alloc (u8_t prio);
67 void tcp_abandon (struct tcp_pcb *pcb, int reset);
68 err_t tcp_send_empty_ack(struct tcp_pcb *pcb);
69 void tcp_rexmit (struct tcp_pcb *pcb);
70 void tcp_rexmit_rto (struct tcp_pcb *pcb);
71 void tcp_rexmit_fast (struct tcp_pcb *pcb);
72 u32_t tcp_update_rcv_ann_wnd(struct tcp_pcb *pcb);
73 err_t tcp_process_refused_data(struct tcp_pcb *pcb);
74 
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)) \
89  ) ? 1 : 0)
90 #define tcp_output_nagle(tpcb) (tcp_do_output_nagle(tpcb) ? tcp_output(tpcb) : ERR_OK)
91 
92 
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)
97 /* is b<=a<=c? */
98 #if 0 /* see bug #10548 */
99 #define TCP_SEQ_BETWEEN(a,b,c) ((c)-(b) >= (a)-(b))
100 #endif
101 #define TCP_SEQ_BETWEEN(a,b,c) (TCP_SEQ_GEQ(a,b) && TCP_SEQ_LEQ(a,c))
102 #define TCP_FIN 0x01U
103 #define TCP_SYN 0x02U
104 #define TCP_RST 0x04U
105 #define TCP_PSH 0x08U
106 #define TCP_ACK 0x10U
107 #define TCP_URG 0x20U
108 #define TCP_ECE 0x40U
109 #define TCP_CWR 0x80U
110 
111 #define TCP_FLAGS 0x3fU
112 
113 /* Length of the TCP header, excluding options. */
114 #define TCP_HLEN 20
115 
116 #ifndef TCP_TMR_INTERVAL
117 #define TCP_TMR_INTERVAL 250 /* The TCP timer interval in milliseconds. */
118 #endif /* TCP_TMR_INTERVAL */
119 
120 #ifndef TCP_FAST_INTERVAL
121 #define TCP_FAST_INTERVAL TCP_TMR_INTERVAL /* the fine grained timeout in milliseconds */
122 #endif /* TCP_FAST_INTERVAL */
123 
124 #ifndef TCP_SLOW_INTERVAL
125 #define TCP_SLOW_INTERVAL (2*TCP_TMR_INTERVAL) /* the coarse grained timeout in milliseconds */
126 #endif /* TCP_SLOW_INTERVAL */
127 
128 #define TCP_FIN_WAIT_TIMEOUT 20000 /* milliseconds */
129 #define TCP_SYN_RCVD_TIMEOUT 20000 /* milliseconds */
130 
131 #define TCP_OOSEQ_TIMEOUT 6U /* x RTO */
132 
133 #ifndef TCP_MSL
134 #define TCP_MSL 60000UL /* The maximum segment lifetime in milliseconds */
135 #endif
136 
137 /* Keepalive values, compliant with RFC 1122. Don't change this unless you know what you're doing */
138 #ifndef TCP_KEEPIDLE_DEFAULT
139 #define TCP_KEEPIDLE_DEFAULT 7200000UL /* Default KEEPALIVE timer in milliseconds */
140 #endif
141 
142 #ifndef TCP_KEEPINTVL_DEFAULT
143 #define TCP_KEEPINTVL_DEFAULT 75000UL /* Default Time between KEEPALIVE probes in milliseconds */
144 #endif
145 
146 #ifndef TCP_KEEPCNT_DEFAULT
147 #define TCP_KEEPCNT_DEFAULT 9U /* Default Counter for KEEPALIVE probes */
148 #endif
149 
150 #define TCP_MAXIDLE TCP_KEEPCNT_DEFAULT * TCP_KEEPINTVL_DEFAULT /* Maximum KEEPALIVE probe time */
151 
152 /* Fields are (of course) in network byte order.
153  * Some fields are converted to host byte order in tcp_input().
154  */
155 #ifdef PACK_STRUCT_USE_INCLUDES
156 # include "arch/bpstruct.h"
157 #endif
159 struct tcp_hdr {
162  PACK_STRUCT_FIELD(u32_t seqno);
163  PACK_STRUCT_FIELD(u32_t ackno);
164  PACK_STRUCT_FIELD(u16_t _hdrlen_rsvd_flags);
167  PACK_STRUCT_FIELD(u16_t urgp);
170 #ifdef PACK_STRUCT_USE_INCLUDES
171 # include "arch/epstruct.h"
172 #endif
173 
174 #define TCPH_HDRLEN(phdr) (ntohs((phdr)->_hdrlen_rsvd_flags) >> 12)
175 #define TCPH_FLAGS(phdr) (ntohs((phdr)->_hdrlen_rsvd_flags) & TCP_FLAGS)
176 
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))
180 
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)) )
183 
184 #define TCP_TCPLEN(seg) ((seg)->len + ((TCPH_FLAGS((seg)->tcphdr) & (TCP_FIN | TCP_SYN)) != 0))
185 
188 #define TF_RESET (u8_t)0x08U /* Connection was reset. */
189 #define TF_CLOSED (u8_t)0x10U /* Connection was sucessfully closed. */
190 #define TF_GOT_FIN (u8_t)0x20U /* Connection was closed by the remote end. */
191 
192 
193 #if LWIP_EVENT_API
194 
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))
209 
210 #else /* LWIP_EVENT_API */
211 
212 #define TCP_EVENT_ACCEPT(pcb,err,ret) \
213  do { \
214  if((pcb)->accept != NULL) \
215  (ret) = (pcb)->accept((pcb)->callback_arg,(pcb),(err)); \
216  else (ret) = ERR_ARG; \
217  } while (0)
218 
219 #define TCP_EVENT_SENT(pcb,space,ret) \
220  do { \
221  if((pcb)->sent != NULL) \
222  (ret) = (pcb)->sent((pcb)->callback_arg,(pcb),(space)); \
223  else (ret) = ERR_OK; \
224  } while (0)
225 
226 #define TCP_EVENT_RECV(pcb,p,err,ret) \
227  do { \
228  if((pcb)->recv != NULL) { \
229  (ret) = (pcb)->recv((pcb)->callback_arg,(pcb),(p),(err));\
230  } else { \
231  (ret) = tcp_recv_null(NULL, (pcb), (p), (err)); \
232  } \
233  } while (0)
234 
235 #define TCP_EVENT_CLOSED(pcb,ret) \
236  do { \
237  if(((pcb)->recv != NULL)) { \
238  (ret) = (pcb)->recv((pcb)->callback_arg,(pcb),NULL,ERR_OK);\
239  } else { \
240  (ret) = ERR_OK; \
241  } \
242  } while (0)
243 
244 #define TCP_EVENT_CONNECTED(pcb,err,ret) \
245  do { \
246  if((pcb)->connected != NULL) \
247  (ret) = (pcb)->connected((pcb)->callback_arg,(pcb),(err)); \
248  else (ret) = ERR_OK; \
249  } while (0)
250 
251 #define TCP_EVENT_POLL(pcb,ret) \
252  do { \
253  if((pcb)->poll != NULL) \
254  (ret) = (pcb)->poll((pcb)->callback_arg,(pcb)); \
255  else (ret) = ERR_OK; \
256  } while (0)
257 
258 #define TCP_EVENT_ERR(errf,arg,err) \
259  do { \
260  if((errf) != NULL) \
261  (errf)((arg),(err)); \
262  } while (0)
263 
264 #endif /* LWIP_EVENT_API */
265 
267 #if TCP_OVERSIZE && defined(LWIP_DEBUG)
268 #define TCP_OVERSIZE_DBGCHECK 1
269 #else
270 #define TCP_OVERSIZE_DBGCHECK 0
271 #endif
272 
274 #define TCP_CHECKSUM_ON_COPY (LWIP_CHECKSUM_ON_COPY && CHECKSUM_GEN_TCP)
275 
276 /* This structure represents a TCP segment on the unsent, unacked and ooseq queues */
277 struct tcp_seg {
278  struct tcp_seg *next; /* used when putting segements on a queue */
279  struct pbuf *p; /* buffer containing data + TCP header */
280  u16_t len; /* the TCP length of this segment */
281 #if TCP_OVERSIZE_DBGCHECK
282  u16_t oversize_left; /* Extra bytes available at the end of the last
283  pbuf in unsent (used for asserting vs.
284  tcp_pcb.unsent_oversized only) */
285 #endif /* TCP_OVERSIZE_DBGCHECK */
286 #if TCP_CHECKSUM_ON_COPY
287  u16_t chksum;
288  u8_t chksum_swapped;
289 #endif /* TCP_CHECKSUM_ON_COPY */
290  u8_t flags;
291 #define TF_SEG_OPTS_MSS (u8_t)0x01U /* Include MSS option. */
292 #define TF_SEG_OPTS_TS (u8_t)0x02U /* Include timestamp option. */
293 #define TF_SEG_DATA_CHECKSUMMED (u8_t)0x04U /* ALL data (not the header) is
294  checksummed into 'chksum' */
295  struct tcp_hdr *tcphdr; /* the TCP header */
296 };
297 
298 #define LWIP_TCP_OPT_LENGTH(flags) \
299  (flags & TF_SEG_OPTS_MSS ? 4 : 0) + \
300  (flags & TF_SEG_OPTS_TS ? 12 : 0)
301 
303 #define TCP_BUILD_MSS_OPTION(mss) htonl(0x02040000 | ((mss) & 0xFFFF))
304 
305 /* Global variables: */
306 extern struct tcp_pcb *tcp_input_pcb;
307 extern u32_t tcp_ticks;
308 extern u8_t tcp_active_pcbs_changed;
309 
310 /* The TCP PCB lists. */
311 union tcp_listen_pcbs_t { /* List of all TCP PCBs in LISTEN state. */
312  struct tcp_pcb_listen *listen_pcbs;
313  struct tcp_pcb *pcbs;
314 };
315 extern struct tcp_pcb *tcp_bound_pcbs;
316 extern union tcp_listen_pcbs_t tcp_listen_pcbs;
317 extern struct tcp_pcb *tcp_active_pcbs; /* List of all TCP PCBs that are in a
318  state in which they accept or send
319  data. */
320 extern struct tcp_pcb *tcp_tw_pcbs; /* List of all TCP PCBs in TIME-WAIT. */
321 
322 extern struct tcp_pcb *tcp_tmp_pcb; /* Only used for temporary storage. */
323 
324 /* Axioms about the above lists:
325  1) Every TCP PCB that is not CLOSED is in one of the lists.
326  2) A PCB is only in one of the lists.
327  3) All PCBs in the tcp_listen_pcbs list is in LISTEN state.
328  4) All PCBs in the tcp_tw_pcbs list is in TIME-WAIT state.
329 */
330 /* Define two macros, TCP_REG and TCP_RMV that registers a TCP PCB
331  with a PCB list or removes a PCB from a list, respectively. */
332 #ifndef TCP_DEBUG_PCB_LISTS
333 #define TCP_DEBUG_PCB_LISTS 0
334 #endif
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)); \
342  } \
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)); \
346  *(pcbs) = (npcb); \
347  LWIP_ASSERT("TCP_RMV: tcp_pcbs sane", tcp_pcbs_sane()); \
348  tcp_timer_needed(); \
349  } while(0)
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; \
358  break; \
359  } \
360  } \
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))); \
364  } while(0)
365 
366 #else /* LWIP_DEBUG */
367 
368 #define TCP_REG(pcbs, npcb) \
369  do { \
370  (npcb)->next = *pcbs; \
371  *(pcbs) = (npcb); \
372  tcp_timer_needed(); \
373  } while (0)
374 
375 #define TCP_RMV(pcbs, npcb) \
376  do { \
377  if(*(pcbs) == (npcb)) { \
378  (*(pcbs)) = (*pcbs)->next; \
379  } \
380  else { \
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; \
386  break; \
387  } \
388  } \
389  } \
390  (npcb)->next = NULL; \
391  } while(0)
392 
393 #endif /* LWIP_DEBUG */
394 
395 #define TCP_REG_ACTIVE(npcb) \
396  do { \
397  TCP_REG(&tcp_active_pcbs, npcb); \
398  tcp_active_pcbs_changed = 1; \
399  } while (0)
400 
401 #define TCP_RMV_ACTIVE(npcb) \
402  do { \
403  TCP_RMV(&tcp_active_pcbs, npcb); \
404  tcp_active_pcbs_changed = 1; \
405  } while (0)
406 
407 #define TCP_PCB_REMOVE_ACTIVE(pcb) \
408  do { \
409  tcp_pcb_remove(&tcp_active_pcbs, pcb); \
410  tcp_active_pcbs_changed = 1; \
411  } while (0)
412 
413 
414 /* Internal functions: */
415 struct tcp_pcb *tcp_pcb_copy(struct tcp_pcb *pcb);
416 void tcp_pcb_purge(struct tcp_pcb *pcb);
417 void tcp_pcb_remove(struct tcp_pcb **pcblist, struct tcp_pcb *pcb);
418 
419 void tcp_segs_free(struct tcp_seg *seg);
420 void tcp_seg_free(struct tcp_seg *seg);
421 struct tcp_seg *tcp_seg_copy(struct tcp_seg *seg);
422 
423 #define tcp_ack(pcb) \
424  do { \
425  if((pcb)->flags & TF_ACK_DELAY) { \
426  (pcb)->flags &= ~TF_ACK_DELAY; \
427  (pcb)->flags |= TF_ACK_NOW; \
428  } \
429  else { \
430  (pcb)->flags |= TF_ACK_DELAY; \
431  } \
432  } while (0)
433 
434 #define tcp_ack_now(pcb) \
435  do { \
436  (pcb)->flags |= TF_ACK_NOW; \
437  } while (0)
438 
439 err_t tcp_send_fin(struct tcp_pcb *pcb);
440 err_t tcp_enqueue_flags(struct tcp_pcb *pcb, u8_t flags);
441 
442 void tcp_rexmit_seg(struct tcp_pcb *pcb, struct tcp_seg *seg);
443 
444 void tcp_rst(u32_t seqno, u32_t ackno,
445  ip_addr_t *local_ip, ip_addr_t *remote_ip,
446  u16_t local_port, u16_t remote_port);
447 
448 u32_t tcp_next_iss(void);
449 
450 void tcp_keepalive(struct tcp_pcb *pcb);
451 void tcp_zero_window_probe(struct tcp_pcb *pcb);
452 
453 #if TCP_CALCULATE_EFF_SEND_MSS
454 u16_t tcp_eff_send_mss(u16_t sendmss, ip_addr_t *addr);
455 #endif /* TCP_CALCULATE_EFF_SEND_MSS */
456 
457 #if LWIP_CALLBACK_API
458 err_t tcp_recv_null(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err);
459 #endif /* LWIP_CALLBACK_API */
460 
461 #if TCP_DEBUG || TCP_INPUT_DEBUG || TCP_OUTPUT_DEBUG
462 void tcp_debug_print(struct tcp_hdr *tcphdr);
463 void tcp_debug_print_flags(u8_t flags);
464 void tcp_debug_print_state(enum tcp_state s);
465 void tcp_debug_print_pcbs(void);
466 s16_t tcp_pcbs_sane(void);
467 #else
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
473 #endif /* TCP_DEBUG */
474 
477 void tcp_timer_needed(void);
478 
479 
480 #ifdef __cplusplus
481 }
482 #endif
483 
484 #endif /* LWIP_TCP */
485 
486 #endif /* __LWIP_TCP_H__ */
typedefPACK_STRUCT_END struct ip_addr ip_addr_t
Definition: ip_addr.h:64
void tcp_timer_needed(void)
Definition: timers.c:484
#define PACK_STRUCT_FIELD(x)
Definition: arch.h:68
void tcp_send_fin(struct sock *sk)
#define PACK_STRUCT_STRUCT
Definition: cc.h:59
STREAM tcp_init(uint32 maxlen)
Definition: tcp.c:82
s8_t err_t
Definition: err.h:47
Definition: pbuf.h:79
unsigned long u32_t
Definition: cc.h:25
Definition: netif.h:136
GLbitfield flags
Definition: glext.h:7161
Definition: tcpdef.h:22
GLenum const GLvoid * addr
Definition: glext.h:9621
#define PACK_STRUCT_BEGIN
Definition: arch.h:60
GLenum GLsizei len
Definition: glext.h:6722
GLdouble s
Definition: gl.h:2039
GLenum src
Definition: glext.h:6340
#define err(...)
seg
Definition: i386-dis.c:3857
static unsigned __int64 next
Definition: rand_nt.c:6
GLboolean reset
Definition: glext.h:5666
static u32_t chksum(void *dataptr, u16_t len)
Definition: inet6.c:55
unsigned char u8_t
Definition: cc.h:23
#define PACK_STRUCT_END
Definition: arch.h:64
static char * dest
Definition: rtl.c:135
unsigned short u16_t
Definition: cc.h:24
GLfloat GLfloat p
Definition: glext.h:8902
signed short s16_t
Definition: cc.h:29