udp.c@ 94264

Last change on this file since 94264 was 93115, checked in by vboxsync, 3 years ago
scm --update-copyright-year
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 19.3 KB

Line
1	/* $Id: udp.c 93115 2022-01-01 11:31:46Z vboxsync $ */
2	/** @file
3	* NAT - UDP protocol.
4	*/
5
6	/*
7	* Copyright (C) 2006-2022 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*/
17
18	/*
19	* This code is based on:
20	*
21	* Copyright (c) 1982, 1986, 1988, 1990, 1993
22	* The Regents of the University of California. All rights reserved.
23	*
24	* Redistribution and use in source and binary forms, with or without
25	* modification, are permitted provided that the following conditions
26	* are met:
27	* 1. Redistributions of source code must retain the above copyright
28	* notice, this list of conditions and the following disclaimer.
29	* 2. Redistributions in binary form must reproduce the above copyright
30	* notice, this list of conditions and the following disclaimer in the
31	* documentation and/or other materials provided with the distribution.
32	* 3. All advertising materials mentioning features or use of this software
33	* must display the following acknowledgement:
34	* This product includes software developed by the University of
35	* California, Berkeley and its contributors.
36	* 4. Neither the name of the University nor the names of its contributors
37	* may be used to endorse or promote products derived from this software
38	* without specific prior written permission.
39	*
40	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
41	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
44	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50	* SUCH DAMAGE.
51	*
52	* @(#)udp_usrreq.c 8.4 (Berkeley) 1/21/94
53	* udp_usrreq.c,v 1.4 1994/10/02 17:48:45 phk Exp
54	*/
55
56	/*
57	* Changes and additions relating to SLiRP
58	* Copyright (c) 1995 Danny Gasparovski.
59	*
60	* Please read the file COPYRIGHT for the
61	* terms and conditions of the copyright.
62	*/
63
64	#include <slirp.h>
65	#include "ip_icmp.h"
66
67
68	/*
69	* UDP protocol implementation.
70	* Per RFC 768, August, 1980.
71	*/
72	#define udpcksum 1
73
74	void
75	udp_init(PNATState pData)
76	{
77	udp_last_so = &udb;
78	udb.so_next = udb.so_prev = &udb;
79	}
80
81	/* m->m_data points at ip packet header
82	* m->m_len length ip packet
83	* ip->ip_len length data (IPDU)
84	*/
85	void
86	udp_input(PNATState pData, register struct mbuf *m, int iphlen)
87	{
88	register struct ip *ip;
89	register struct udphdr *uh;
90	int len;
91	struct ip save_ip;
92	struct socket *so;
93	int ret;
94	int ttl, tos;
95
96	LogFlowFunc(("ENTER: m = %p, iphlen = %d\n", m, iphlen));
97	ip = mtod(m, struct ip *);
98	Log2(("%RTnaipv4 iphlen = %d\n", ip->ip_dst, iphlen));
99
100	udpstat.udps_ipackets++;
101
102	/*
103	* Strip IP options, if any; should skip this,
104	* make available to user, and use on returned packets,
105	* but we don't yet have a way to check the checksum
106	* with options still present.
107	*/
108	if (iphlen > sizeof(struct ip))
109	{
110	ip_stripoptions(m, (struct mbuf *)0);
111	iphlen = sizeof(struct ip);
112	}
113
114	/*
115	* Get IP and UDP header together in first mbuf.
116	*/
117	ip = mtod(m, struct ip *);
118	uh = (struct udphdr *)((caddr_t)ip + iphlen);
119
120	/*
121	* Make mbuf data length reflect UDP length.
122	* If not enough data to reflect UDP length, drop.
123	*/
124	len = RT_N2H_U16((u_int16_t)uh->uh_ulen);
125	Assert(ip->ip_len + iphlen == (ssize_t)m_length(m, NULL));
126
127	if (ip->ip_len != len)
128	{
129	if (len > ip->ip_len)
130	{
131	udpstat.udps_badlen++;
132	Log3(("NAT: IP(id: %hd) has bad size\n", ip->ip_id));
133	goto bad_free_mbuf;
134	}
135	m_adj(m, len - ip->ip_len);
136	ip->ip_len = len;
137	}
138
139	/*
140	* Save a copy of the IP header in case we want restore it
141	* for sending an ICMP error message in response.
142	*/
143	save_ip = *ip;
144	save_ip.ip_len+= iphlen; /* tcp_input subtracts this */
145
146	/*
147	* Checksum extended UDP header and data.
148	*/
149	if (udpcksum && uh->uh_sum)
150	{
151	memset(((struct ipovly *)ip)->ih_x1, 0, 9);
152	((struct ipovly *)ip)->ih_len = uh->uh_ulen;
153	#if 0
154	/* keep uh_sum for ICMP reply */
155	uh->uh_sum = cksum(m, len + sizeof (struct ip));
156	if (uh->uh_sum)
157	{
158
159	#endif
160	if (cksum(m, len + iphlen))
161	{
162	udpstat.udps_badsum++;
163	Log3(("NAT: IP(id: %hd) has bad (udp) cksum\n", ip->ip_id));
164	goto bad_free_mbuf;
165	}
166	}
167	#if 0
168	}
169	#endif
170
171	/*
172	* handle DHCP/BOOTP
173	*/
174	if (uh->uh_dport == RT_H2N_U16_C(BOOTP_SERVER))
175	{
176	bootp_input(pData, m);
177	goto done_free_mbuf;
178	}
179
180	LogFunc(("uh src: %RTnaipv4:%d, dst: %RTnaipv4:%d\n",
181	ip->ip_src.s_addr, RT_N2H_U16(uh->uh_sport),
182	ip->ip_dst.s_addr, RT_N2H_U16(uh->uh_dport)));
183
184	/*
185	* handle DNS host resolver without creating a socket
186	*/
187	if ( pData->fUseHostResolver
188	&& uh->uh_dport == RT_H2N_U16_C(53)
189	&& CTL_CHECK(ip->ip_dst.s_addr, CTL_DNS))
190	{
191	struct sockaddr_in dst, src;
192
193	src.sin_addr.s_addr = ip->ip_dst.s_addr;
194	src.sin_port = uh->uh_dport;
195	dst.sin_addr.s_addr = ip->ip_src.s_addr;
196	dst.sin_port = uh->uh_sport;
197
198	m_adj(m, sizeof(struct udpiphdr));
199
200	m = hostresolver(pData, m, ip->ip_src.s_addr, uh->uh_sport);
201	if (m == NULL)
202	goto done_free_mbuf;
203
204	slirpMbufTagService(pData, m, CTL_DNS);
205
206	udp_output2(pData, NULL, m, &src, &dst, IPTOS_LOWDELAY);
207	LogFlowFuncLeave();
208	return;
209	}
210
211	/*
212	* handle TFTP
213	*/
214	if ( uh->uh_dport == RT_H2N_U16_C(TFTP_SERVER)
215	&& CTL_CHECK(ip->ip_dst.s_addr, CTL_TFTP))
216	{
217	if (pData->pvTftpSessions)
218	slirpTftpInput(pData, m);
219	goto done_free_mbuf;
220	}
221
222	/*
223	* XXX: DNS proxy currently relies on the fact that each socket
224	* only serves one request.
225	*/
226	if ( pData->fUseDnsProxy
227	&& CTL_CHECK(ip->ip_dst.s_addr, CTL_DNS)
228	&& (uh->uh_dport == RT_H2N_U16_C(53)))
229	{
230	so = NULL;
231	goto new_socket;
232	}
233
234	/*
235	* Drop UDP packets destind for CTL_ALIAS (i.e. the hosts loopback interface)
236	* if it is disabled.
237	*/
238	if ( CTL_CHECK(ip->ip_dst.s_addr, CTL_ALIAS)
239	&& !pData->fLocalhostReachable)
240	goto done_free_mbuf;
241
242	/*
243	* Locate pcb for datagram.
244	*/
245	so = udp_last_so;
246	if ( so->so_lport != uh->uh_sport
247	\|\| so->so_laddr.s_addr != ip->ip_src.s_addr)
248	{
249	struct socket *tmp;
250
251	for (tmp = udb.so_next; tmp != &udb; tmp = tmp->so_next)
252	{
253	if ( tmp->so_lport == uh->uh_sport
254	&& tmp->so_laddr.s_addr == ip->ip_src.s_addr)
255	{
256	so = tmp;
257	break;
258	}
259	}
260	if (tmp == &udb)
261	so = NULL;
262	else
263	{
264	udpstat.udpps_pcbcachemiss++;
265	udp_last_so = so;
266	}
267	}
268
269	new_socket:
270	if (so == NULL)
271	{
272	/*
273	* If there's no socket for this packet,
274	* create one
275	*/
276	if ((so = socreate()) == NULL)
277	{
278	Log2(("NAT: IP(id: %hd) failed to create socket\n", ip->ip_id));
279	goto bad_free_mbuf;
280	}
281
282	/*
283	* Setup fields
284	*/
285	so->so_laddr = ip->ip_src;
286	so->so_lport = uh->uh_sport;
287	so->so_iptos = ip->ip_tos;
288
289	if (udp_attach(pData, so) <= 0)
290	{
291	Log2(("NAT: IP(id: %hd) udp_attach errno = %d (%s)\n",
292	ip->ip_id, errno, strerror(errno)));
293	sofree(pData, so);
294	goto bad_free_mbuf;
295	}
296
297	/* udp_last_so = so; */
298	/*
299	* XXXXX Here, check if it's in udpexec_list,
300	* and if it is, do the fork_exec() etc.
301	*/
302	}
303
304	so->so_faddr = ip->ip_dst; /* XXX */
305	so->so_fport = uh->uh_dport; /* XXX */
306	Assert(so->so_type == IPPROTO_UDP);
307
308	/*
309	* DNS proxy
310	*/
311	if ( pData->fUseDnsProxy
312	&& CTL_CHECK(ip->ip_dst.s_addr, CTL_DNS)
313	&& (uh->uh_dport == RT_H2N_U16_C(53)))
314	{
315	dnsproxy_query(pData, so, m, iphlen);
316	goto done_free_mbuf;
317	}
318
319	iphlen += sizeof(struct udphdr);
320	m->m_len -= iphlen;
321	m->m_data += iphlen;
322
323	ttl = ip->ip_ttl = save_ip.ip_ttl;
324	if (ttl != so->so_sottl) {
325	ret = setsockopt(so->s, IPPROTO_IP, IP_TTL,
326	(char *)&ttl, sizeof(ttl));
327	if (RT_LIKELY(ret == 0))
328	so->so_sottl = ttl;
329	}
330
331	tos = save_ip.ip_tos;
332	if (tos != so->so_sotos) {
333	ret = setsockopt(so->s, IPPROTO_IP, IP_TOS,
334	(char *)&tos, sizeof(tos));
335	if (RT_LIKELY(ret == 0))
336	so->so_sotos = tos;
337	}
338
339	{
340	/*
341	* Different OSes have different socket options for DF. We
342	* can't use IP_HDRINCL here as it's only valid for SOCK_RAW.
343	*/
344	# define USE_DF_OPTION(_Optname) \
345	const int dfopt = _Optname
346	#if defined(IP_MTU_DISCOVER)
347	USE_DF_OPTION(IP_MTU_DISCOVER);
348	#elif defined(IP_DONTFRAG) /* Solaris 11+, FreeBSD */
349	USE_DF_OPTION(IP_DONTFRAG);
350	#elif defined(IP_DONTFRAGMENT) /* Windows */
351	USE_DF_OPTION(IP_DONTFRAGMENT);
352	#else
353	USE_DF_OPTION(0);
354	#endif
355	if (dfopt) {
356	int df = (save_ip.ip_off & IP_DF) != 0;
357	#if defined(IP_MTU_DISCOVER)
358	df = df ? IP_PMTUDISC_DO : IP_PMTUDISC_DONT;
359	#endif
360	if (df != so->so_sodf) {
361	ret = setsockopt(so->s, IPPROTO_IP, dfopt,
362	(char *)&df, sizeof(df));
363	if (RT_LIKELY(ret == 0))
364	so->so_sodf = df;
365	}
366	}
367	}
368
369	if ( sosendto(pData, so, m) == -1
370	&& ( !soIgnorableErrorCode(errno)
371	&& errno != ENOTCONN))
372	{
373	m->m_len += iphlen;
374	m->m_data -= iphlen;
375	*ip = save_ip;
376	Log2(("NAT: UDP tx errno = %d (%s) on sent to %RTnaipv4\n",
377	errno, strerror(errno), ip->ip_dst));
378	icmp_error(pData, m, ICMP_UNREACH, ICMP_UNREACH_NET, 0, strerror(errno));
379	so->so_m = NULL;
380	LogFlowFuncLeave();
381	return;
382	}
383
384	if (so->so_m)
385	m_freem(pData, so->so_m); /* used for ICMP if error on sorecvfrom */
386
387	/* restore the orig mbuf packet */
388	m->m_len += iphlen;
389	m->m_data -= iphlen;
390	*ip = save_ip;
391	so->so_m = m; /* ICMP backup */
392	LogFlowFuncLeave();
393	return;
394
395	bad_free_mbuf:
396	Log2(("NAT: UDP(id: %hd) datagram to %RTnaipv4 with size(%d) claimed as bad\n",
397	ip->ip_id, &ip->ip_dst, ip->ip_len));
398
399	done_free_mbuf:
400	/* some services like bootp(built-in), dns(buildt-in) and dhcp don't need sockets
401	* and create new m'buffers to send them to guest, so we'll free their incomming
402	* buffers here.
403	*/
404	if (m != NULL)
405	m_freem(pData, m);
406	LogFlowFuncLeave();
407	return;
408	}
409
410	/**
411	* Output a UDP packet.
412	*
413	* @note This function will finally free m!
414	*/
415	int udp_output2(PNATState pData, struct socket so, struct mbuf m,
416	struct sockaddr_in saddr, struct sockaddr_in daddr,
417	int iptos)
418	{
419	register struct udpiphdr *ui;
420	int error;
421	int mlen = 0;
422
423	LogFlowFunc(("ENTER: so = %R[natsock], m = %p, saddr = %RTnaipv4, daddr = %RTnaipv4\n",
424	so, m, saddr->sin_addr.s_addr, daddr->sin_addr.s_addr));
425
426	/* in case of built-in service so might be NULL */
427	if (so) Assert(so->so_type == IPPROTO_UDP);
428
429	/*
430	* Adjust for header
431	*/
432	m->m_data -= sizeof(struct udpiphdr);
433	m->m_len += sizeof(struct udpiphdr);
434	mlen = m_length(m, NULL);
435
436	/*
437	* Fill in mbuf with extended UDP header
438	* and addresses and length put into network format.
439	*/
440	ui = mtod(m, struct udpiphdr *);
441	memset(ui->ui_x1, 0, 9);
442	ui->ui_pr = IPPROTO_UDP;
443	ui->ui_len = RT_H2N_U16((uint16_t)(mlen - sizeof(struct ip)));
444	/* XXXXX Check for from-one-location sockets, or from-any-location sockets */
445	ui->ui_src = saddr->sin_addr;
446	ui->ui_dst = daddr->sin_addr;
447	ui->ui_sport = saddr->sin_port;
448	ui->ui_dport = daddr->sin_port;
449	ui->ui_ulen = ui->ui_len;
450
451	/*
452	* Stuff checksum and output datagram.
453	*/
454	ui->ui_sum = 0;
455	if (udpcksum)
456	{
457	if ((ui->ui_sum = cksum(m, /* sizeof (struct udpiphdr) + */ mlen)) == 0)
458	ui->ui_sum = 0xffff;
459	}
460	((struct ip *)ui)->ip_len = mlen;
461	((struct ip *)ui)->ip_ttl = ip_defttl;
462	((struct ip *)ui)->ip_tos = iptos;
463
464	udpstat.udps_opackets++;
465
466	error = ip_output(pData, so, m);
467
468	return error;
469	}
470
471	/**
472	* @note This function will free m!
473	*/
474	int udp_output(PNATState pData, struct socket so, struct mbuf m,
475	struct sockaddr_in *addr)
476	{
477	struct sockaddr_in saddr, daddr;
478
479	Assert(so->so_type == IPPROTO_UDP);
480	LogFlowFunc(("ENTER: so = %R[natsock], m = %p, saddr = %RTnaipv4\n", so, m, addr->sin_addr.s_addr));
481
482	if (so->so_laddr.s_addr == INADDR_ANY)
483	{
484	if (pData->guest_addr_guess.s_addr != INADDR_ANY)
485	{
486	LogRel2(("NAT: port-forward: using %RTnaipv4 for %R[natsock]\n",
487	pData->guest_addr_guess.s_addr, so));
488	so->so_laddr = pData->guest_addr_guess;
489	}
490	else
491	{
492	LogRel2(("NAT: port-forward: guest address unknown for %R[natsock]\n", so));
493	m_freem(pData, m);
494	return 0;
495	}
496	}
497
498	saddr = *addr;
499	if ((so->so_faddr.s_addr & RT_H2N_U32(pData->netmask)) == pData->special_addr.s_addr)
500	{
501	saddr.sin_addr.s_addr = so->so_faddr.s_addr;
502	if (slirpIsWideCasting(pData, so->so_faddr.s_addr))
503	{
504	/**
505	* We haven't got real firewall but have got its submodule libalias.
506	*/
507	m->m_flags \|= M_SKIP_FIREWALL;
508	/**
509	* udp/137 port is Name Service in NetBIOS protocol. for some reasons Windows guest rejects
510	* accept data from non-aliased server.
511	*/
512	if ( (so->so_fport == so->so_lport)
513	&& (so->so_fport == RT_H2N_U16(137)))
514	saddr.sin_addr.s_addr = alias_addr.s_addr;
515	else
516	saddr.sin_addr.s_addr = addr->sin_addr.s_addr;
517	so->so_faddr.s_addr = addr->sin_addr.s_addr;
518	}
519	}
520
521	/* Any UDP packet to the loopback address must be translated to be from
522	* the forwarding address, i.e. 10.0.2.2. */
523	if ( (saddr.sin_addr.s_addr & RT_H2N_U32_C(IN_CLASSA_NET))
524	== RT_H2N_U32_C(INADDR_LOOPBACK & IN_CLASSA_NET))
525	saddr.sin_addr.s_addr = alias_addr.s_addr;
526
527	daddr.sin_addr = so->so_laddr;
528	daddr.sin_port = so->so_lport;
529
530	return udp_output2(pData, so, m, &saddr, &daddr, so->so_iptos);
531	}
532
533	int
534	udp_attach(PNATState pData, struct socket *so)
535	{
536	struct sockaddr sa_addr;
537	socklen_t socklen = sizeof(struct sockaddr);
538	int status;
539	int opt = 1;
540
541	AssertReturn(so->so_type == 0, -1);
542	so->so_type = IPPROTO_UDP;
543
544	so->s = socket(AF_INET, SOCK_DGRAM, 0);
545	if (so->s == -1)
546	goto error;
547	fd_nonblock(so->s);
548
549	so->so_sottl = 0;
550	so->so_sotos = 0;
551	so->so_sodf = -1;
552
553	status = sobind(pData, so);
554	if (status != 0)
555	return status;
556
557	/* success, insert in queue */
558	so->so_expire = curtime + SO_EXPIRE;
559
560	/* enable broadcast for later use */
561	setsockopt(so->s, SOL_SOCKET, SO_BROADCAST, (const char *)&opt, sizeof(opt));
562
563	status = getsockname(so->s, &sa_addr, &socklen);
564	if (status == 0)
565	{
566	Assert(sa_addr.sa_family == AF_INET);
567	so->so_hlport = ((struct sockaddr_in *)&sa_addr)->sin_port;
568	so->so_hladdr.s_addr = ((struct sockaddr_in *)&sa_addr)->sin_addr.s_addr;
569	}
570
571	SOCKET_LOCK_CREATE(so);
572	QSOCKET_LOCK(udb);
573	insque(pData, so, &udb);
574	NSOCK_INC();
575	QSOCKET_UNLOCK(udb);
576	return so->s;
577	error:
578	Log2(("NAT: can't create datagram socket\n"));
579	return -1;
580	}
581
582	void
583	udp_detach(PNATState pData, struct socket *so)
584	{
585	if (so != &pData->icmp_socket)
586	{
587	Assert(so->so_type == IPPROTO_UDP);
588	QSOCKET_LOCK(udb);
589	SOCKET_LOCK(so);
590	QSOCKET_UNLOCK(udb);
591	closesocket(so->s);
592	sofree(pData, so);
593	SOCKET_UNLOCK(so);
594	}
595	}
596
597	struct socket *
598	udp_listen(PNATState pData, u_int32_t bind_addr, u_int port, u_int32_t laddr, u_int lport, int flags)
599	{
600	struct sockaddr_in addr;
601	struct socket *so;
602	socklen_t addrlen = sizeof(struct sockaddr_in);
603	int opt = 1;
604	LogFlowFunc(("ENTER: bind_addr:%RTnaipv4, port:%d, laddr:%RTnaipv4, lport:%d, flags:%x\n",
605	bind_addr, RT_N2H_U16(port), laddr, RT_N2H_U16(lport), flags));
606
607	if ((so = socreate()) == NULL)
608	{
609	LogFlowFunc(("LEAVE: NULL\n"));
610	return NULL;
611	}
612
613	so->s = socket(AF_INET, SOCK_DGRAM, 0);
614	if (so->s == -1)
615	{
616	LogRel(("NAT: can't create datagram socket\n"));
617	RTMemFree(so);
618	LogFlowFunc(("LEAVE: NULL\n"));
619	return NULL;
620	}
621	so->so_expire = curtime + SO_EXPIRE;
622	so->so_type = IPPROTO_UDP;
623	fd_nonblock(so->s);
624	so->so_sottl = 0;
625	so->so_sotos = 0;
626	so->so_sodf = -1;
627	SOCKET_LOCK_CREATE(so);
628	QSOCKET_LOCK(udb);
629	insque(pData, so, &udb);
630	NSOCK_INC();
631	QSOCKET_UNLOCK(udb);
632
633	memset(&addr, 0, sizeof(addr));
634	#ifdef RT_OS_DARWIN
635	addr.sin_len = sizeof(addr);
636	#endif
637	addr.sin_family = AF_INET;
638	addr.sin_addr.s_addr = bind_addr;
639	addr.sin_port = port;
640
641	if (bind(so->s,(struct sockaddr *)&addr, addrlen) < 0)
642	{
643	LogRel(("NAT: udp bind to %RTnaipv4:%d failed, error %d\n",
644	addr.sin_addr, RT_N2H_U16(port), errno));
645	udp_detach(pData, so);
646	LogFlowFunc(("LEAVE: NULL\n"));
647	return NULL;
648	}
649	setsockopt(so->s, SOL_SOCKET, SO_REUSEADDR,(char *)&opt, sizeof(int));
650	/* setsockopt(so->s, SOL_SOCKET, SO_OOBINLINE,(char )&opt, sizeof(int)); /
651
652	getsockname(so->s,(struct sockaddr *)&addr,&addrlen);
653	so->so_hladdr = addr.sin_addr;
654	so->so_hlport = addr.sin_port;
655
656	/* XXX: wtf are we setting so_faddr/so_fport here? */
657	so->so_fport = addr.sin_port;
658	#if 0
659	/* The original check was completely broken, as the commented out
660	* if statement was always true (INADDR_ANY=0). */
661	/** @todo vvl - alias_addr should be set (if required)
662	* later by liabalias module.
663	*/
664	if (addr.sin_addr.s_addr == 0 \|\| addr.sin_addr.s_addr == loopback_addr.s_addr)
665	so->so_faddr = alias_addr;
666	else
667	#endif
668	so->so_faddr = addr.sin_addr;
669
670	so->so_lport = lport;
671	so->so_laddr.s_addr = laddr;
672	if (flags != SS_FACCEPTONCE)
673	so->so_expire = 0;
674
675	so->so_state = SS_ISFCONNECTED;
676
677	LogFlowFunc(("LEAVE: %R[natsock]\n", so));
678	return so;
679	}

Note: See TracBrowser for help on using the repository browser.

source: vbox/trunk/src/VBox/Devices/Network/slirp/udp.c@ 94264

Download in other formats: