VirtualBox

source: vbox/trunk/src/VBox/Devices/Network/slirp/slirp_state.h@ 16581

Last change on this file since 16581 was 16562, checked in by vboxsync, 16 years ago

NAT:NSOK_INC/DEC added to count sockets number for allocation enough pollfd buffer
(and latter epoll_event (for Linux only)).
  • Property svn:eol-style set to native
File size: 26.0 KB
Line 
1/** @file
2 * NAT state/configuration.
3 */
4
5/*
6 * Copyright (C) 2006-2007 Sun Microsystems, Inc.
7 *
8 * This file is part of VirtualBox Open Source Edition (OSE), as
9 * available from http://www.virtualbox.org. This file is free software;
10 * you can redistribute it and/or modify it under the terms of the GNU
11 * General Public License (GPL) as published by the Free Software
12 * Foundation, in version 2 as it comes in the "COPYING" file of the
13 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
14 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
15 *
16 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
17 * Clara, CA 95054 USA or visit http://www.sun.com if you need
18 * additional information or have any questions.
19 */
20
21#ifndef _slirp_state_h_
22#define _slirp_state_h_
23#include <iprt/req.h>
24#include "ip_icmp.h"
25
26/** Number of DHCP clients supported by NAT. */
27#define NB_ADDR 16
28
29/** Where to start DHCP IP number allocation. */
30#define START_ADDR 15
31
32/** DHCP Lease time. */
33#define LEASE_TIME (24 * 3600)
34
35/** Entry in the table of known DHCP clients. */
36typedef struct
37{
38 bool allocated;
39 uint8_t macaddr[6];
40} BOOTPClient;
41
42
43/** TFTP session entry. */
44struct tftp_session
45{
46 int in_use;
47 unsigned char filename[TFTP_FILENAME_MAX];
48
49 struct in_addr client_ip;
50 u_int16_t client_port;
51
52 int timestamp;
53};
54
55#ifdef VBOX_WITH_MULTI_DNS
56struct dns_entry
57{
58 struct in_addr de_addr;
59 LIST_ENTRY(dns_entry) de_list;
60};
61LIST_HEAD(dns_list_head, dns_entry);
62#endif
63
64/** Main state/configuration structure for slirp NAT. */
65typedef struct NATState
66{
67 /* Stuff from boot.c */
68 BOOTPClient bootp_clients[NB_ADDR];
69 const char *bootp_filename;
70 /* Stuff from if.c */
71 int if_mtu, if_mru;
72 int if_comp;
73 int if_maxlinkhdr;
74 int if_queued;
75 int if_thresh;
76 struct mbuf if_fastq;
77 struct mbuf if_batchq;
78 struct mbuf *next_m;
79 /* Stuff from icmp.c */
80 struct icmpstat_t icmpstat;
81 /* Stuff from ip_input.c */
82 struct ipstat_t ipstat;
83 struct ipqhead ipq[IPREASS_NHASH];
84 int maxnipq; /* Administrative limit on # of reass queues*/
85 int maxfragsperpacket; /* Maximum number of IPv4 fragments allowed per packet */
86 int nipq; /* total number of reass queues */
87 uint16_t ip_currid;
88 /* Stuff from mbuf.c */
89 int mbuf_alloced, mbuf_max;
90 int msize;
91 struct mbuf m_freelist, m_usedlist;
92 /* Stuff from slirp.c */
93 void *pvUser;
94 uint32_t curtime;
95 uint32_t time_fasttimo;
96 uint32_t last_slowtimo;
97 bool do_slowtimo;
98 bool link_up;
99 struct timeval tt;
100 struct in_addr our_addr;
101 struct in_addr alias_addr;
102 struct in_addr special_addr;
103#ifdef VBOX_WITH_SLIRP_MT
104 PRTREQQUEUE pReqQueue;
105#endif
106#ifndef VBOX_WITH_MULTI_DNS
107 struct in_addr dns_addr;
108#else
109 struct dns_list_head dns_list_head;
110#endif
111 struct in_addr tftp_server;
112 struct in_addr loopback_addr;
113 uint32_t netmask;
114 uint8_t client_ethaddr[6];
115 struct ex_list *exec_list;
116 char slirp_hostname[33];
117 bool fPassDomain;
118 const char *pszDomain;
119 /* Stuff from tcp_input.c */
120 struct socket tcb;
121#ifdef VBOX_WITH_SLIRP_MT
122 RTCRITSECT tcb_mutex;
123#endif
124 struct socket *tcp_last_so;
125 tcp_seq tcp_iss;
126 /* Stuff from tcp_timer.c */
127 struct tcpstat_t tcpstat;
128 uint32_t tcp_now;
129 int tcp_reass_qsize;
130 int tcp_reass_maxqlen;
131 int tcp_reass_maxseg;
132 int tcp_reass_overflows;
133 /* Stuff from tftp.c */
134 struct tftp_session tftp_sessions[TFTP_SESSIONS_MAX];
135 const char *tftp_prefix;
136 /* Stuff from udp.c */
137 struct udpstat_t udpstat;
138 struct socket udb;
139#ifdef VBOX_WITH_SLIRP_MT
140 RTCRITSECT udb_mutex;
141#endif
142 struct socket *udp_last_so;
143 struct socket icmp_socket;
144 struct icmp_storage icmp_msg_head;
145# ifndef RT_OS_WINDOWS
146 /* counter of sockets needed for allocation enough room to
147 * process sockets with poll/epoll
148 *
149 * NSOCK_INC/DEC should be injected before every
150 * operation on socket queue (tcb, udb)
151 */
152 int nsock;
153# define NSOCK_INC() do {pData->nsock++;} while (0)
154# define NSOCK_DEC() do {pData->nsock--;} while (0)
155# else
156# define NSOCK_INC() do {} while (0)
157# define NSOCK_DEC() do {} while (0)
158# endif
159# ifdef RT_OS_WINDOWS
160 void *pvIcmpBuffer;
161 size_t szIcmpBuffer;
162 /* Accordin MSDN specification IcmpParseReplies
163 * function should be detected in runtime
164 */
165 long (WINAPI * pfIcmpParseReplies)(void *, long);
166 BOOL (WINAPI * pfIcmpCloseHandle)(HANDLE);
167 HMODULE hmIcmpLibrary;
168# endif
169#if defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && defined(RT_OS_WINDOWS)
170# define VBOX_SOCKET_EVENT (pData->phEvents[VBOX_SOCKET_EVENT_INDEX])
171 HANDLE phEvents[VBOX_EVENT_COUNT];
172#endif
173#if !defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && defined(RT_OS_WINDOWS)
174 int fIcmp;
175#endif
176 STAMPROFILE StatFill;
177 STAMPROFILE StatPoll;
178 STAMPROFILE StatFastTimer;
179 STAMPROFILE StatSlowTimer;
180 STAMCOUNTER StatTCP;
181 STAMCOUNTER StatUDP;
182 STAMCOUNTER StatTCPHot;
183 STAMCOUNTER StatUDPHot;
184} NATState;
185
186
187/** Default IP time to live. */
188#define ip_defttl IPDEFTTL
189
190/** Number of permanent buffers in mbuf. */
191#define mbuf_thresh 30
192
193/** Use a fixed time before sending keepalive. */
194#define tcp_keepidle TCPTV_KEEP_IDLE
195
196/** Use a fixed interval between keepalive. */
197#define tcp_keepintvl TCPTV_KEEPINTVL
198
199/** Maximum idle time before timing out a connection. */
200#define tcp_maxidle (TCPTV_KEEPCNT * tcp_keepintvl)
201
202/** Default TCP socket options. */
203#define so_options DO_KEEPALIVE
204
205/** Default TCP MSS value. */
206#define tcp_mssdflt TCP_MSS
207
208/** Default TCP round trip time. */
209#define tcp_rttdflt (TCPTV_SRTTDFLT / PR_SLOWHZ)
210
211/** Enable RFC1323 performance enhancements.
212 * @todo check if it really works, it was turned off before. */
213#define tcp_do_rfc1323 1
214
215/** TCP receive buffer size. */
216#define tcp_rcvspace TCP_RCVSPACE
217
218/** TCP receive buffer size. */
219#define tcp_sndspace TCP_SNDSPACE
220
221/* TCP duplicate ACK retransmit threshold. */
222#define tcprexmtthresh 3
223
224
225#define bootp_filename pData->bootp_filename
226#define bootp_clients pData->bootp_clients
227
228#define if_mtu pData->if_mtu
229#define if_mru pData->if_mru
230#define if_comp pData->if_comp
231#define if_maxlinkhdr pData->if_maxlinkhdr
232#define if_queued pData->if_queued
233#define if_thresh pData->if_thresh
234#define if_fastq pData->if_fastq
235#define if_batchq pData->if_batchq
236#define next_m pData->next_m
237
238#define icmpstat pData->icmpstat
239
240#define ipstat pData->ipstat
241#define ipq pData->ipq
242#define ip_currid pData->ip_currid
243
244#define mbuf_alloced pData->mbuf_alloced
245#define mbuf_max pData->mbuf_max
246#define msize pData->msize
247#define m_freelist pData->m_freelist
248#define m_usedlist pData->m_usedlist
249
250#define curtime pData->curtime
251#define time_fasttimo pData->time_fasttimo
252#define last_slowtimo pData->last_slowtimo
253#define do_slowtimo pData->do_slowtimo
254#define link_up pData->link_up
255#define cUsers pData->cUsers
256#define tt pData->tt
257#define our_addr pData->our_addr
258#define alias_addr pData->alias_addr
259#define special_addr pData->special_addr
260#define dns_addr pData->dns_addr
261#define loopback_addr pData->loopback_addr
262#define client_ethaddr pData->client_ethaddr
263#define exec_list pData->exec_list
264#define slirp_hostname pData->slirp_hostname
265
266#define tcb pData->tcb
267#define tcp_last_so pData->tcp_last_so
268#define tcp_iss pData->tcp_iss
269
270#define tcpstat pData->tcpstat
271#define tcp_now pData->tcp_now
272
273#define tftp_sessions pData->tftp_sessions
274#define tftp_prefix pData->tftp_prefix
275
276#define udpstat pData->udpstat
277#define udb pData->udb
278#define udp_last_so pData->udp_last_so
279
280#define maxfragsperpacket pData->maxfragsperpacket
281#define maxnipq pData->maxnipq
282#define nipq pData->nipq
283
284#define tcp_reass_qsize pData->tcp_reass_qsize
285#define tcp_reass_maxqlen pData->tcp_reass_maxqlen
286#define tcp_reass_maxseg pData->tcp_reass_maxseg
287#define tcp_reass_overflows pData->tcp_reass_overflows
288
289#if !defined(VBOX_WITH_SIMPLIFIED_SLIRP_SYNC) && defined(RT_OS_WINDOWS)
290# define fIcmp pData->fIcmp
291#endif
292
293#define queue_tcp_label tcb
294#define queue_udp_label udb
295#define __X(x) x
296#define _X(x) __X(x)
297#define _str(x) #x
298#define str(x) _str(x)
299#ifdef VBOX_WITH_SLIRP_MT
300#define QSOCKET_LOCK(queue) \
301do { \
302 int rc; \
303 /* Assert(strcmp(RTThreadSelfName(), "EMT") != 0); */ \
304 rc = RTCritSectEnter(&_X(queue) ## _mutex); \
305 AssertReleaseRC(rc); \
306} while (0)
307#define QSOCKET_UNLOCK(queue) \
308do { \
309 int rc; \
310 rc = RTCritSectLeave(&_X(queue) ## _mutex); \
311 AssertReleaseRC(rc); \
312} while (0)
313#define QSOCKET_LOCK_CREATE(queue) \
314do { \
315 int rc; \
316 rc = RTCritSectInit(&pData->queue ## _mutex); \
317 AssertReleaseRC(rc); \
318} while (0)
319#define QSOCKET_LOCK_DESTROY(queue) \
320do { \
321 int rc = RTCritSectDelete(&pData->queue ## _mutex); \
322 AssertReleaseRC(rc); \
323} while (0)
324
325# define QSOCKET_FOREACH(so, sonext, label) \
326 QSOCKET_LOCK(__X(queue_## label ## _label)); \
327 (so) = (_X(queue_ ## label ## _label)).so_next; \
328 QSOCKET_UNLOCK(__X(queue_## label ##_label)); \
329 if ((so) != &(_X(queue_## label ## _label))) SOCKET_LOCK((so)); \
330 for(;;) \
331 { \
332 if ((so) == &(_X(queue_## label ## _label))) \
333 { \
334 break; \
335 } \
336 Log2(("%s:%d Processing so:%R[natsock]\n", __FUNCTION__, __LINE__, (so)));
337
338# define CONTINUE_NO_UNLOCK(label) goto loop_end_ ## label ## _mt_nounlock
339# define CONTINUE(label) goto loop_end_ ## label ## _mt
340/* @todo replace queue parameter with macrodinition */
341/* _mt_nounlock - user should lock so_next before calling CONTINUE_NO_UNLOCK */
342# define LOOP_LABEL(label, so, sonext) loop_end_ ## label ## _mt: \
343 (sonext) = (so)->so_next; \
344 SOCKET_UNLOCK(so); \
345 QSOCKET_LOCK(_X(queue_ ## label ## _label)); \
346 if ((sonext) != &(_X(queue_## label ## _label))) \
347 { \
348 SOCKET_LOCK((sonext)); \
349 QSOCKET_UNLOCK(_X(queue_ ## label ## _label)); \
350 } \
351 else \
352 { \
353 so = &_X(queue_ ## label ## _label); \
354 QSOCKET_UNLOCK(_X(queue_ ## label ## _label)); \
355 break; \
356 } \
357 (so) = (sonext); \
358 continue; \
359 loop_end_ ## label ## _mt_nounlock: \
360 (so) = (sonext)
361
362#define DO_TCP_OUTPUT(data, sotcb) \
363do { \
364 PRTREQ pReq = NULL; \
365 int rc; \
366 rc = RTReqAlloc((data)->pReqQueue, &pReq, RTREQTYPE_INTERNAL); \
367 AssertReleaseRC(rc); \
368 pReq->u.Internal.pfn = (PFNRT)tcp_output; \
369 pReq->u.Internal.cArgs = 2; \
370 pReq->u.Internal.aArgs[0] = (uintptr_t)(data); \
371 pReq->u.Internal.aArgs[1] = (uintptr_t)(sotcb); \
372 pReq->fFlags = RTREQFLAGS_VOID; \
373 rc = RTReqQueue(pReq, 0); \
374 if (RT_LIKELY(rc) == VERR_TIMEOUT) \
375 { \
376 SOCKET_UNLOCK(so); \
377 rc = RTReqWait(pReq, RT_INDEFINITE_WAIT); \
378 AssertReleaseRC(rc); \
379 SOCKET_LOCK(so); \
380 RTReqFree(pReq); \
381 } \
382 else \
383 AssertReleaseRC(rc); \
384} while(0)
385
386#define DO_TCP_INPUT(data, mbuf, size, so) \
387do { \
388 PRTREQ pReq = NULL; \
389 int rc; \
390 rc = RTReqAlloc((data)->pReqQueue, &pReq, RTREQTYPE_INTERNAL); \
391 AssertReleaseRC(rc); \
392 pReq->u.Internal.pfn = (PFNRT)tcp_input; \
393 pReq->u.Internal.cArgs = 4; \
394 pReq->u.Internal.aArgs[0] = (uintptr_t)(data); \
395 pReq->u.Internal.aArgs[1] = (uintptr_t)(mbuf); \
396 pReq->u.Internal.aArgs[2] = (uintptr_t)(size); \
397 pReq->u.Internal.aArgs[3] = (uintptr_t)(so); \
398 pReq->fFlags = RTREQFLAGS_VOID|RTREQFLAGS_NO_WAIT; \
399 rc = RTReqQueue(pReq, 0); \
400 AssertReleaseRC(rc); \
401} while(0)
402
403#define DO_TCP_CONNECT(data, so) \
404do { \
405 PRTREQ pReq = NULL; \
406 int rc; \
407 rc = RTReqAlloc((data)->pReqQueue, &pReq, RTREQTYPE_INTERNAL); \
408 AssertReleaseRC(rc); \
409 pReq->u.Internal.pfn = (PFNRT)tcp_connect; \
410 pReq->u.Internal.cArgs = 2; \
411 pReq->u.Internal.aArgs[0] = (uintptr_t)(data); \
412 pReq->u.Internal.aArgs[1] = (uintptr_t)(so); \
413 pReq->fFlags = RTREQFLAGS_VOID; \
414 rc = RTReqQueue(pReq, 0); /* don't wait, we have to release lock before*/ \
415 if (RT_LIKELY(rc) == VERR_TIMEOUT) \
416 { \
417 SOCKET_UNLOCK(so); \
418 rc = RTReqWait(pReq, RT_INDEFINITE_WAIT); \
419 AssertReleaseRC(rc); \
420 SOCKET_LOCK(so); \
421 RTReqFree(pReq); \
422 } \
423 else \
424 AssertReleaseRC(rc); \
425} while(0)
426
427#define DO_SOREAD(ret, data, so, ifclose) \
428do { \
429 PRTREQ pReq = NULL; \
430 int rc; \
431 rc = RTReqAlloc((data)->pReqQueue, &pReq, RTREQTYPE_INTERNAL); \
432 AssertReleaseRC(rc); \
433 pReq->u.Internal.pfn = (PFNRT)soread_queue; \
434 pReq->u.Internal.cArgs = 4; \
435 pReq->u.Internal.aArgs[0] = (uintptr_t)(data); \
436 pReq->u.Internal.aArgs[1] = (uintptr_t)(so); \
437 pReq->u.Internal.aArgs[2] = (uintptr_t)(ifclose); \
438 pReq->u.Internal.aArgs[3] = (uintptr_t)&(ret); \
439 pReq->fFlags = RTREQFLAGS_VOID; \
440 rc = RTReqQueue(pReq, 0); /* don't wait, we have to release lock before*/ \
441 if (RT_LIKELY(rc) == VERR_TIMEOUT) \
442 { \
443 SOCKET_UNLOCK(so); \
444 rc = RTReqWait(pReq, RT_INDEFINITE_WAIT); \
445 AssertReleaseRC(rc); \
446 SOCKET_LOCK(so); \
447 RTReqFree(pReq); \
448 } \
449 else \
450 AssertReleaseRC(rc); \
451} while(0)
452
453#define DO_SOWRITE(ret, data, so) \
454do { \
455 PRTREQ pReq = NULL; \
456 int rc; \
457 rc = RTReqAlloc((data)->pReqQueue, &pReq, RTREQTYPE_INTERNAL); \
458 AssertReleaseRC(rc); \
459 pReq->u.Internal.pfn = (PFNRT)sowrite; \
460 pReq->u.Internal.cArgs = 2; \
461 pReq->u.Internal.aArgs[0] = (uintptr_t)(data); \
462 pReq->u.Internal.aArgs[1] = (uintptr_t)(so); \
463 pReq->fFlags = RTREQFLAGS_RETURN_MASK; \
464 rc = RTReqQueue(pReq, 0); /* don't wait, we have to release lock before*/ \
465 if (RT_LIKELY(rc) == VERR_TIMEOUT) \
466 { \
467 SOCKET_UNLOCK(so); \
468 rc = RTReqWait(pReq, RT_INDEFINITE_WAIT); \
469 SOCKET_LOCK(so); \
470 ret = pReq->iStatus; \
471 RTReqFree(pReq); \
472 } \
473 else \
474 AssertReleaseRC(rc); \
475} while(0)
476
477#define DO_SORECFROM(data, so) \
478do { \
479 PRTREQ pReq = NULL; \
480 int rc; \
481 rc = RTReqAlloc((data)->pReqQueue, &pReq, RTREQTYPE_INTERNAL); \
482 AssertReleaseRC(rc); \
483 pReq->u.Internal.pfn = (PFNRT)sorecvfrom; \
484 pReq->u.Internal.cArgs = 2; \
485 pReq->u.Internal.aArgs[0] = (uintptr_t)(data); \
486 pReq->u.Internal.aArgs[1] = (uintptr_t)(so); \
487 pReq->fFlags = RTREQFLAGS_VOID; \
488 rc = RTReqQueue(pReq, 0); \
489 if (RT_LIKELY(rc) == VERR_TIMEOUT) \
490 { \
491 SOCKET_UNLOCK(so); \
492 rc = RTReqWait(pReq, RT_INDEFINITE_WAIT); \
493 AssertReleaseRC(rc); \
494 SOCKET_LOCK(so); \
495 RTReqFree(pReq); \
496 } \
497 else \
498 AssertReleaseRC(rc); \
499} while(0)
500
501#define DO_UDP_DETACH(data, so, so_next) \
502do { \
503 PRTREQ pReq = NULL; \
504 int rc; \
505 rc = RTReqAlloc((data)->pReqQueue, &pReq, RTREQTYPE_INTERNAL); \
506 AssertReleaseRC(rc); \
507 pReq->u.Internal.pfn = (PFNRT)udp_detach; \
508 pReq->u.Internal.cArgs = 2; \
509 pReq->u.Internal.aArgs[0] = (uintptr_t)(data); \
510 pReq->u.Internal.aArgs[1] = (uintptr_t)(so); \
511 pReq->fFlags = RTREQFLAGS_VOID; \
512 rc = RTReqQueue(pReq, 0); /* don't wait, we have to release lock before*/ \
513 if (RT_LIKELY(rc) == VERR_TIMEOUT) \
514 { \
515 SOCKET_UNLOCK(so); \
516 rc = RTReqWait(pReq, RT_INDEFINITE_WAIT); \
517 AssertReleaseRC(rc); \
518 if ((so_next) != &udb) SOCKET_LOCK((so_next)); \
519 RTReqFree(pReq); \
520 } \
521 else \
522 AssertReleaseRC(rc); \
523} while(0)
524
525#define SOLOOKUP(so, label, src, sport, dst, dport) \
526do { \
527 struct socket *sonxt; \
528 (so) = NULL; \
529 QSOCKET_FOREACH(so, sonxt, label) \
530 /* { */ \
531 if ( so->so_lport == (sport) \
532 && so->so_laddr.s_addr == (src).s_addr \
533 && so->so_faddr.s_addr == (dst).s_addr \
534 && so->so_fport == (dport)) \
535 { \
536 if (sonxt != &__X(queue_ ## label ## _label)) \
537 SOCKET_UNLOCK(sonxt); \
538 break; /*so is locked*/ \
539 } \
540 LOOP_LABEL(so, sonxt, label); \
541 } \
542 } \
543}while (0)
544
545#else
546#define QSOCKET_LOCK(queue) do {} while (0)
547#define QSOCKET_UNLOCK(queue) do {} while (0)
548#define QSOCKET_LOCK_CREATE(queue) do {} while (0)
549#define QSOCKET_LOCK_DESTROY(queue) do {} while (0)
550# define QSOCKET_FOREACH(so, sonext, label) \
551 for ((so) = __X(queue_ ## label ## _label).so_next; so != &(__X(queue_ ## label ## _label)); (so) = (sonext)) \
552 { \
553 (sonext) = (so)->so_next;
554# define CONTINUE(label) continue
555# define CONTINUE_NO_UNLOCK(label) continue
556# define LOOP_LABEL(label, so, sonext) /* empty*/
557#define DO_TCP_OUTPUT(data, sotcb) tcp_output((data), (sotcb))
558#define DO_TCP_INPUT(data, mbuf, size, so) tcp_input((data), (mbuf), (size), (so))
559#define DO_TCP_CONNECT(data, so) tcp_connect((data), (so))
560#define DO_SOREAD(ret, data, so, ifclose) do{(ret) = soread((data), (so), (ifclose));}while(0)
561#define DO_SOWRITE(ret, data, so) do{(ret) = sowrite((data), (so));}while(0)
562#define DO_SORECFROM(data, so) sorecvfrom((data), (so))
563#define SOLOOKUP(so, label, src, sport, dst, dport) \
564do { \
565 (so) = solookup(&__X(queue_ ## label ## _label), (src), (sport), (dst), (dport)); \
566} while (0)
567#define DO_UDP_DETACH(data, so, ignored) udp_detach((data), (so))
568#endif
569
570#define TCP_OUTPUT(data, sotcb) DO_TCP_OUTPUT((data), (sotcb))
571#define TCP_INPUT(data, mbuf, size, so) DO_TCP_INPUT((data), (mbuf), (size), (so))
572#define TCP_CONNECT(data, so) DO_TCP_CONNECT((data), (so))
573#define SOREAD(ret, data, so, ifclose) DO_SOREAD((ret), (data), (so), (ifclose))
574#define SOWRITE(ret, data, so) DO_SOWRITE((ret), (data), (so))
575#define SORECVFROM(data, so) DO_SORECFROM((data), (so))
576#define UDP_DETACH(data, so, so_next) DO_UDP_DETACH((data), (so), (so_next))
577#endif /* !_slirp_state_h_ */
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