2 * Copyright (c) 1995 Danny Gasparovski.
4 * Please read the file COPYRIGHT for the
5 * terms and conditions of the copyright.
8 #include "qemu/osdep.h"
9 #include "qemu-common.h"
13 #include <sys/filio.h>
16 static void sofcantrcvmore(struct socket
*so
);
17 static void sofcantsendmore(struct socket
*so
);
19 struct socket
*solookup(struct socket
**last
, struct socket
*head
,
20 struct sockaddr_storage
*lhost
, struct sockaddr_storage
*fhost
)
22 struct socket
*so
= *last
;
25 if (so
!= head
&& sockaddr_equal(&(so
->lhost
.ss
), lhost
)
26 && (!fhost
|| sockaddr_equal(&so
->fhost
.ss
, fhost
))) {
30 for (so
= head
->so_next
; so
!= head
; so
= so
->so_next
) {
31 if (sockaddr_equal(&(so
->lhost
.ss
), lhost
)
32 && (!fhost
|| sockaddr_equal(&so
->fhost
.ss
, fhost
))) {
38 return (struct socket
*)NULL
;
42 * Create a new socket, initialise the fields
43 * It is the responsibility of the caller to
44 * insque() it into the correct linked-list
47 socreate(Slirp
*slirp
)
51 so
= (struct socket
*)malloc(sizeof(struct socket
));
53 memset(so
, 0, sizeof(struct socket
));
54 so
->so_state
= SS_NOFDREF
;
63 * remque and free a socket, clobber cache
66 sofree(struct socket
*so
)
68 Slirp
*slirp
= so
->slirp
;
71 for (ifm
= (struct mbuf
*) slirp
->if_fastq
.qh_link
;
72 (struct quehead
*) ifm
!= &slirp
->if_fastq
;
73 ifm
= ifm
->ifq_next
) {
74 if (ifm
->ifq_so
== so
) {
79 for (ifm
= (struct mbuf
*) slirp
->if_batchq
.qh_link
;
80 (struct quehead
*) ifm
!= &slirp
->if_batchq
;
81 ifm
= ifm
->ifq_next
) {
82 if (ifm
->ifq_so
== so
) {
87 if (so
->so_emu
==EMU_RSH
&& so
->extra
) {
91 if (so
== slirp
->tcp_last_so
) {
92 slirp
->tcp_last_so
= &slirp
->tcb
;
93 } else if (so
== slirp
->udp_last_so
) {
94 slirp
->udp_last_so
= &slirp
->udb
;
95 } else if (so
== slirp
->icmp_last_so
) {
96 slirp
->icmp_last_so
= &slirp
->icmp
;
100 if(so
->so_next
&& so
->so_prev
)
101 remque(so
); /* crashes if so is not in a queue */
109 size_t sopreprbuf(struct socket
*so
, struct iovec
*iov
, int *np
)
112 struct sbuf
*sb
= &so
->so_snd
;
113 int len
= sb
->sb_datalen
- sb
->sb_cc
;
114 int mss
= so
->so_tcpcb
->t_maxseg
;
116 DEBUG_CALL("sopreprbuf");
117 DEBUG_ARG("so = %p", so
);
122 iov
[0].iov_base
= sb
->sb_wptr
;
123 iov
[1].iov_base
= NULL
;
125 if (sb
->sb_wptr
< sb
->sb_rptr
) {
126 iov
[0].iov_len
= sb
->sb_rptr
- sb
->sb_wptr
;
127 /* Should never succeed, but... */
128 if (iov
[0].iov_len
> len
)
129 iov
[0].iov_len
= len
;
130 if (iov
[0].iov_len
> mss
)
131 iov
[0].iov_len
-= iov
[0].iov_len
%mss
;
134 iov
[0].iov_len
= (sb
->sb_data
+ sb
->sb_datalen
) - sb
->sb_wptr
;
135 /* Should never succeed, but... */
136 if (iov
[0].iov_len
> len
) iov
[0].iov_len
= len
;
137 len
-= iov
[0].iov_len
;
139 iov
[1].iov_base
= sb
->sb_data
;
140 iov
[1].iov_len
= sb
->sb_rptr
- sb
->sb_data
;
141 if(iov
[1].iov_len
> len
)
142 iov
[1].iov_len
= len
;
143 total
= iov
[0].iov_len
+ iov
[1].iov_len
;
146 if (iov
[1].iov_len
> lss
) {
147 iov
[1].iov_len
-= lss
;
150 lss
-= iov
[1].iov_len
;
151 iov
[0].iov_len
-= lss
;
157 if (iov
[0].iov_len
> mss
)
158 iov
[0].iov_len
-= iov
[0].iov_len
%mss
;
165 return iov
[0].iov_len
+ (n
- 1) * iov
[1].iov_len
;
169 * Read from so's socket into sb_snd, updating all relevant sbuf fields
170 * NOTE: This will only be called if it is select()ed for reading, so
171 * a read() of 0 (or less) means it's disconnected
174 soread(struct socket
*so
)
177 struct sbuf
*sb
= &so
->so_snd
;
180 DEBUG_CALL("soread");
181 DEBUG_ARG("so = %p", so
);
184 * No need to check if there's enough room to read.
185 * soread wouldn't have been called if there weren't
187 sopreprbuf(so
, iov
, &n
);
190 nn
= readv(so
->s
, (struct iovec
*)iov
, n
);
191 DEBUG_MISC((dfd
, " ... read nn = %d bytes\n", nn
));
193 nn
= qemu_recv(so
->s
, iov
[0].iov_base
, iov
[0].iov_len
,0);
196 if (nn
< 0 && (errno
== EINTR
|| errno
== EAGAIN
))
200 socklen_t slen
= sizeof err
;
204 getsockopt(so
->s
, SOL_SOCKET
, SO_ERROR
,
208 DEBUG_MISC((dfd
, " --- soread() disconnected, nn = %d, errno = %d-%s\n", nn
, errno
,strerror(errno
)));
211 if (err
== ECONNRESET
|| err
== ECONNREFUSED
212 || err
== ENOTCONN
|| err
== EPIPE
) {
213 tcp_drop(sototcpcb(so
), err
);
215 tcp_sockclosed(sototcpcb(so
));
223 * If there was no error, try and read the second time round
224 * We read again if n = 2 (ie, there's another part of the buffer)
225 * and we read as much as we could in the first read
226 * We don't test for <= 0 this time, because there legitimately
227 * might not be any more data (since the socket is non-blocking),
228 * a close will be detected on next iteration.
229 * A return of -1 won't (shouldn't) happen, since it didn't happen above
231 if (n
== 2 && nn
== iov
[0].iov_len
) {
233 ret
= qemu_recv(so
->s
, iov
[1].iov_base
, iov
[1].iov_len
,0);
238 DEBUG_MISC((dfd
, " ... read nn = %d bytes\n", nn
));
244 if (sb
->sb_wptr
>= (sb
->sb_data
+ sb
->sb_datalen
))
245 sb
->sb_wptr
-= sb
->sb_datalen
;
249 int soreadbuf(struct socket
*so
, const char *buf
, int size
)
251 int n
, nn
, copy
= size
;
252 struct sbuf
*sb
= &so
->so_snd
;
255 DEBUG_CALL("soreadbuf");
256 DEBUG_ARG("so = %p", so
);
259 * No need to check if there's enough room to read.
260 * soread wouldn't have been called if there weren't
262 if (sopreprbuf(so
, iov
, &n
) < size
)
265 nn
= MIN(iov
[0].iov_len
, copy
);
266 memcpy(iov
[0].iov_base
, buf
, nn
);
274 memcpy(iov
[1].iov_base
, buf
, copy
);
280 if (sb
->sb_wptr
>= (sb
->sb_data
+ sb
->sb_datalen
))
281 sb
->sb_wptr
-= sb
->sb_datalen
;
286 tcp_sockclosed(sototcpcb(so
));
287 fprintf(stderr
, "soreadbuf buffer to small");
294 * When the socket is created, we set it SO_OOBINLINE,
295 * so when OOB data arrives, we soread() it and everything
296 * in the send buffer is sent as urgent data
299 sorecvoob(struct socket
*so
)
301 struct tcpcb
*tp
= sototcpcb(so
);
304 DEBUG_CALL("sorecvoob");
305 DEBUG_ARG("so = %p", so
);
308 * We take a guess at how much urgent data has arrived.
309 * In most situations, when urgent data arrives, the next
310 * read() should get all the urgent data. This guess will
311 * be wrong however if more data arrives just after the
312 * urgent data, or the read() doesn't return all the
317 tp
->snd_up
= tp
->snd_una
+ so
->so_snd
.sb_cc
;
328 * There's a lot duplicated code here, but...
331 sosendoob(struct socket
*so
)
333 struct sbuf
*sb
= &so
->so_rcv
;
334 char buff
[2048]; /* XXX Shouldn't be sending more oob data than this */
338 DEBUG_CALL("sosendoob");
339 DEBUG_ARG("so = %p", so
);
340 DEBUG_ARG("sb->sb_cc = %d", sb
->sb_cc
);
342 if (so
->so_urgc
> 2048)
343 so
->so_urgc
= 2048; /* XXXX */
345 if (sb
->sb_rptr
< sb
->sb_wptr
) {
346 /* We can send it directly */
347 n
= slirp_send(so
, sb
->sb_rptr
, so
->so_urgc
, (MSG_OOB
)); /* |MSG_DONTWAIT)); */
350 * Since there's no sendv or sendtov like writev,
351 * we must copy all data to a linear buffer then
354 uint32_t urgc
= so
->so_urgc
;
355 len
= (sb
->sb_data
+ sb
->sb_datalen
) - sb
->sb_rptr
;
359 memcpy(buff
, sb
->sb_rptr
, len
);
362 n
= sb
->sb_wptr
- sb
->sb_data
;
366 memcpy((buff
+ len
), sb
->sb_data
, n
);
369 n
= slirp_send(so
, buff
, len
, (MSG_OOB
)); /* |MSG_DONTWAIT)); */
374 DEBUG_ERROR((dfd
, "Didn't send all data urgently XXXXX\n"));
381 DEBUG_MISC((dfd
, " ---2 sent %d bytes urgent data, %d urgent bytes left\n", n
, so
->so_urgc
));
385 if (sb
->sb_rptr
>= (sb
->sb_data
+ sb
->sb_datalen
))
386 sb
->sb_rptr
-= sb
->sb_datalen
;
392 * Write data from so_rcv to so's socket,
393 * updating all sbuf field as necessary
396 sowrite(struct socket
*so
)
399 struct sbuf
*sb
= &so
->so_rcv
;
403 DEBUG_CALL("sowrite");
404 DEBUG_ARG("so = %p", so
);
407 uint32_t expected
= so
->so_urgc
;
408 if (sosendoob(so
) < expected
) {
409 /* Treat a short write as a fatal error too,
410 * rather than continuing on and sending the urgent
411 * data as if it were non-urgent and leaving the
412 * so_urgc count wrong.
414 goto err_disconnected
;
421 * No need to check if there's something to write,
422 * sowrite wouldn't have been called otherwise
425 iov
[0].iov_base
= sb
->sb_rptr
;
426 iov
[1].iov_base
= NULL
;
428 if (sb
->sb_rptr
< sb
->sb_wptr
) {
429 iov
[0].iov_len
= sb
->sb_wptr
- sb
->sb_rptr
;
430 /* Should never succeed, but... */
431 if (iov
[0].iov_len
> len
) iov
[0].iov_len
= len
;
434 iov
[0].iov_len
= (sb
->sb_data
+ sb
->sb_datalen
) - sb
->sb_rptr
;
435 if (iov
[0].iov_len
> len
) iov
[0].iov_len
= len
;
436 len
-= iov
[0].iov_len
;
438 iov
[1].iov_base
= sb
->sb_data
;
439 iov
[1].iov_len
= sb
->sb_wptr
- sb
->sb_data
;
440 if (iov
[1].iov_len
> len
) iov
[1].iov_len
= len
;
445 /* Check if there's urgent data to send, and if so, send it */
448 nn
= writev(so
->s
, (const struct iovec
*)iov
, n
);
450 DEBUG_MISC((dfd
, " ... wrote nn = %d bytes\n", nn
));
452 nn
= slirp_send(so
, iov
[0].iov_base
, iov
[0].iov_len
,0);
454 /* This should never happen, but people tell me it does *shrug* */
455 if (nn
< 0 && (errno
== EAGAIN
|| errno
== EINTR
))
459 goto err_disconnected
;
463 if (n
== 2 && nn
== iov
[0].iov_len
) {
465 ret
= slirp_send(so
, iov
[1].iov_base
, iov
[1].iov_len
,0);
469 DEBUG_MISC((dfd
, " ... wrote nn = %d bytes\n", nn
));
475 if (sb
->sb_rptr
>= (sb
->sb_data
+ sb
->sb_datalen
))
476 sb
->sb_rptr
-= sb
->sb_datalen
;
479 * If in DRAIN mode, and there's no more data, set
482 if ((so
->so_state
& SS_FWDRAIN
) && sb
->sb_cc
== 0)
488 DEBUG_MISC((dfd
, " --- sowrite disconnected, so->so_state = %x, errno = %d\n",
489 so
->so_state
, errno
));
491 tcp_sockclosed(sototcpcb(so
));
496 * recvfrom() a UDP socket
499 sorecvfrom(struct socket
*so
)
501 struct sockaddr_storage addr
;
502 struct sockaddr_storage saddr
, daddr
;
503 socklen_t addrlen
= sizeof(struct sockaddr_storage
);
505 DEBUG_CALL("sorecvfrom");
506 DEBUG_ARG("so = %p", so
);
508 if (so
->so_type
== IPPROTO_ICMP
) { /* This is a "ping" reply */
512 len
= recvfrom(so
->s
, buff
, 256, 0,
513 (struct sockaddr
*)&addr
, &addrlen
);
514 /* XXX Check if reply is "correct"? */
516 if(len
== -1 || len
== 0) {
517 u_char code
=ICMP_UNREACH_PORT
;
519 if(errno
== EHOSTUNREACH
) code
=ICMP_UNREACH_HOST
;
520 else if(errno
== ENETUNREACH
) code
=ICMP_UNREACH_NET
;
522 DEBUG_MISC((dfd
," udp icmp rx errno = %d-%s\n",
523 errno
,strerror(errno
)));
524 icmp_send_error(so
->so_m
, ICMP_UNREACH
, code
, 0, strerror(errno
));
526 icmp_reflect(so
->so_m
);
527 so
->so_m
= NULL
; /* Don't m_free() it again! */
529 /* No need for this socket anymore, udp_detach it */
531 } else { /* A "normal" UDP packet */
540 m
= m_get(so
->slirp
);
544 switch (so
->so_ffamily
) {
546 m
->m_data
+= IF_MAXLINKHDR
+ sizeof(struct udpiphdr
);
549 m
->m_data
+= IF_MAXLINKHDR
+ sizeof(struct ip6
)
550 + sizeof(struct udphdr
);
553 g_assert_not_reached();
558 * XXX Shouldn't FIONREAD packets destined for port 53,
559 * but I don't know the max packet size for DNS lookups
562 /* if (so->so_fport != htons(53)) { */
563 ioctlsocket(so
->s
, FIONREAD
, &n
);
566 n
= (m
->m_data
- m
->m_dat
) + m
->m_len
+ n
+ 1;
572 m
->m_len
= recvfrom(so
->s
, m
->m_data
, len
, 0,
573 (struct sockaddr
*)&addr
, &addrlen
);
574 DEBUG_MISC((dfd
, " did recvfrom %d, errno = %d-%s\n",
575 m
->m_len
, errno
,strerror(errno
)));
577 /* Report error as ICMP */
578 switch (so
->so_lfamily
) {
581 code
= ICMP_UNREACH_PORT
;
583 if (errno
== EHOSTUNREACH
) {
584 code
= ICMP_UNREACH_HOST
;
585 } else if (errno
== ENETUNREACH
) {
586 code
= ICMP_UNREACH_NET
;
589 DEBUG_MISC((dfd
, " rx error, tx icmp ICMP_UNREACH:%i\n", code
));
590 icmp_send_error(so
->so_m
, ICMP_UNREACH
, code
, 0, strerror(errno
));
593 code
= ICMP6_UNREACH_PORT
;
595 if (errno
== EHOSTUNREACH
) {
596 code
= ICMP6_UNREACH_ADDRESS
;
597 } else if (errno
== ENETUNREACH
) {
598 code
= ICMP6_UNREACH_NO_ROUTE
;
601 DEBUG_MISC((dfd
, " rx error, tx icmp6 ICMP_UNREACH:%i\n", code
));
602 icmp6_send_error(so
->so_m
, ICMP6_UNREACH
, code
);
605 g_assert_not_reached();
611 * Hack: domain name lookup will be used the most for UDP,
612 * and since they'll only be used once there's no need
613 * for the 4 minute (or whatever) timeout... So we time them
614 * out much quicker (10 seconds for now...)
617 if (so
->so_fport
== htons(53))
618 so
->so_expire
= curtime
+ SO_EXPIREFAST
;
620 so
->so_expire
= curtime
+ SO_EXPIRE
;
624 * If this packet was destined for CTL_ADDR,
625 * make it look like that's where it came from
628 sotranslate_in(so
, &saddr
);
629 daddr
= so
->lhost
.ss
;
631 switch (so
->so_ffamily
) {
633 udp_output(so
, m
, (struct sockaddr_in
*) &saddr
,
634 (struct sockaddr_in
*) &daddr
,
638 udp6_output(so
, m
, (struct sockaddr_in6
*) &saddr
,
639 (struct sockaddr_in6
*) &daddr
);
642 g_assert_not_reached();
646 } /* if ping packet */
653 sosendto(struct socket
*so
, struct mbuf
*m
)
656 struct sockaddr_storage addr
;
658 DEBUG_CALL("sosendto");
659 DEBUG_ARG("so = %p", so
);
660 DEBUG_ARG("m = %p", m
);
663 DEBUG_CALL(" sendto()ing)");
664 sotranslate_out(so
, &addr
);
666 /* Don't care what port we get */
667 ret
= sendto(so
->s
, m
->m_data
, m
->m_len
, 0,
668 (struct sockaddr
*)&addr
, sockaddr_size(&addr
));
673 * Kill the socket if there's no reply in 4 minutes,
674 * but only if it's an expirable socket
677 so
->so_expire
= curtime
+ SO_EXPIRE
;
678 so
->so_state
&= SS_PERSISTENT_MASK
;
679 so
->so_state
|= SS_ISFCONNECTED
; /* So that it gets select()ed */
684 * Listen for incoming TCP connections
687 tcp_listen(Slirp
*slirp
, uint32_t haddr
, u_int hport
, uint32_t laddr
,
688 u_int lport
, int flags
)
690 struct sockaddr_in addr
;
693 socklen_t addrlen
= sizeof(addr
);
694 memset(&addr
, 0, addrlen
);
696 DEBUG_CALL("tcp_listen");
697 DEBUG_ARG("haddr = %x", haddr
);
698 DEBUG_ARG("hport = %d", hport
);
699 DEBUG_ARG("laddr = %x", laddr
);
700 DEBUG_ARG("lport = %d", lport
);
701 DEBUG_ARG("flags = %x", flags
);
703 so
= socreate(slirp
);
708 /* Don't tcp_attach... we don't need so_snd nor so_rcv */
709 if ((so
->so_tcpcb
= tcp_newtcpcb(so
)) == NULL
) {
713 insque(so
, &slirp
->tcb
);
716 * SS_FACCEPTONCE sockets must time out.
718 if (flags
& SS_FACCEPTONCE
)
719 so
->so_tcpcb
->t_timer
[TCPT_KEEP
] = TCPTV_KEEP_INIT
*2;
721 so
->so_state
&= SS_PERSISTENT_MASK
;
722 so
->so_state
|= (SS_FACCEPTCONN
| flags
);
723 so
->so_lfamily
= AF_INET
;
724 so
->so_lport
= lport
; /* Kept in network format */
725 so
->so_laddr
.s_addr
= laddr
; /* Ditto */
727 addr
.sin_family
= AF_INET
;
728 addr
.sin_addr
.s_addr
= haddr
;
729 addr
.sin_port
= hport
;
731 if (((s
= qemu_socket(AF_INET
,SOCK_STREAM
,0)) < 0) ||
732 (socket_set_fast_reuse(s
) < 0) ||
733 (bind(s
,(struct sockaddr
*)&addr
, sizeof(addr
)) < 0) ||
735 int tmperrno
= errno
; /* Don't clobber the real reason we failed */
741 /* Restore the real errno */
743 WSASetLastError(tmperrno
);
749 qemu_setsockopt(s
, SOL_SOCKET
, SO_OOBINLINE
, &opt
, sizeof(int));
751 getsockname(s
,(struct sockaddr
*)&addr
,&addrlen
);
752 so
->so_ffamily
= AF_INET
;
753 so
->so_fport
= addr
.sin_port
;
754 if (addr
.sin_addr
.s_addr
== 0 || addr
.sin_addr
.s_addr
== loopback_addr
.s_addr
)
755 so
->so_faddr
= slirp
->vhost_addr
;
757 so
->so_faddr
= addr
.sin_addr
;
764 * Various session state calls
765 * XXX Should be #define's
766 * The socket state stuff needs work, these often get call 2 or 3
767 * times each when only 1 was needed
770 soisfconnecting(struct socket
*so
)
772 so
->so_state
&= ~(SS_NOFDREF
|SS_ISFCONNECTED
|SS_FCANTRCVMORE
|
773 SS_FCANTSENDMORE
|SS_FWDRAIN
);
774 so
->so_state
|= SS_ISFCONNECTING
; /* Clobber other states */
778 soisfconnected(struct socket
*so
)
780 so
->so_state
&= ~(SS_ISFCONNECTING
|SS_FWDRAIN
|SS_NOFDREF
);
781 so
->so_state
|= SS_ISFCONNECTED
; /* Clobber other states */
785 sofcantrcvmore(struct socket
*so
)
787 if ((so
->so_state
& SS_NOFDREF
) == 0) {
790 so
->so_state
&= ~(SS_ISFCONNECTING
);
791 if (so
->so_state
& SS_FCANTSENDMORE
) {
792 so
->so_state
&= SS_PERSISTENT_MASK
;
793 so
->so_state
|= SS_NOFDREF
; /* Don't select it */
795 so
->so_state
|= SS_FCANTRCVMORE
;
800 sofcantsendmore(struct socket
*so
)
802 if ((so
->so_state
& SS_NOFDREF
) == 0) {
803 shutdown(so
->s
,1); /* send FIN to fhost */
805 so
->so_state
&= ~(SS_ISFCONNECTING
);
806 if (so
->so_state
& SS_FCANTRCVMORE
) {
807 so
->so_state
&= SS_PERSISTENT_MASK
;
808 so
->so_state
|= SS_NOFDREF
; /* as above */
810 so
->so_state
|= SS_FCANTSENDMORE
;
815 * Set write drain mode
816 * Set CANTSENDMORE once all data has been write()n
819 sofwdrain(struct socket
*so
)
821 if (so
->so_rcv
.sb_cc
)
822 so
->so_state
|= SS_FWDRAIN
;
828 * Translate addr in host addr when it is a virtual address
830 void sotranslate_out(struct socket
*so
, struct sockaddr_storage
*addr
)
832 Slirp
*slirp
= so
->slirp
;
833 struct sockaddr_in
*sin
= (struct sockaddr_in
*)addr
;
834 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*)addr
;
836 switch (addr
->ss_family
) {
838 if ((so
->so_faddr
.s_addr
& slirp
->vnetwork_mask
.s_addr
) ==
839 slirp
->vnetwork_addr
.s_addr
) {
841 if (so
->so_faddr
.s_addr
== slirp
->vnameserver_addr
.s_addr
) {
842 if (get_dns_addr(&sin
->sin_addr
) < 0) {
843 sin
->sin_addr
= loopback_addr
;
846 sin
->sin_addr
= loopback_addr
;
850 DEBUG_MISC((dfd
, " addr.sin_port=%d, "
851 "addr.sin_addr.s_addr=%.16s\n",
852 ntohs(sin
->sin_port
), inet_ntoa(sin
->sin_addr
)));
856 if (in6_equal_net(&so
->so_faddr6
, &slirp
->vprefix_addr6
,
857 slirp
->vprefix_len
)) {
858 if (in6_equal(&so
->so_faddr6
, &slirp
->vnameserver_addr6
)) {
860 if (get_dns6_addr(&sin6
->sin6_addr
, &scope_id
) >= 0) {
861 sin6
->sin6_scope_id
= scope_id
;
863 sin6
->sin6_addr
= in6addr_loopback
;
866 sin6
->sin6_addr
= in6addr_loopback
;
876 void sotranslate_in(struct socket
*so
, struct sockaddr_storage
*addr
)
878 Slirp
*slirp
= so
->slirp
;
879 struct sockaddr_in
*sin
= (struct sockaddr_in
*)addr
;
880 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*)addr
;
882 switch (addr
->ss_family
) {
884 if ((so
->so_faddr
.s_addr
& slirp
->vnetwork_mask
.s_addr
) ==
885 slirp
->vnetwork_addr
.s_addr
) {
886 uint32_t inv_mask
= ~slirp
->vnetwork_mask
.s_addr
;
888 if ((so
->so_faddr
.s_addr
& inv_mask
) == inv_mask
) {
889 sin
->sin_addr
= slirp
->vhost_addr
;
890 } else if (sin
->sin_addr
.s_addr
== loopback_addr
.s_addr
||
891 so
->so_faddr
.s_addr
!= slirp
->vhost_addr
.s_addr
) {
892 sin
->sin_addr
= so
->so_faddr
;
898 if (in6_equal_net(&so
->so_faddr6
, &slirp
->vprefix_addr6
,
899 slirp
->vprefix_len
)) {
900 if (in6_equal(&sin6
->sin6_addr
, &in6addr_loopback
)
901 || !in6_equal(&so
->so_faddr6
, &slirp
->vhost_addr6
)) {
902 sin6
->sin6_addr
= so
->so_faddr6
;
913 * Translate connections from localhost to the real hostname
915 void sotranslate_accept(struct socket
*so
)
917 Slirp
*slirp
= so
->slirp
;
919 switch (so
->so_ffamily
) {
921 if (so
->so_faddr
.s_addr
== INADDR_ANY
||
922 (so
->so_faddr
.s_addr
& loopback_mask
) ==
923 (loopback_addr
.s_addr
& loopback_mask
)) {
924 so
->so_faddr
= slirp
->vhost_addr
;
929 if (in6_equal(&so
->so_faddr6
, &in6addr_any
) ||
930 in6_equal(&so
->so_faddr6
, &in6addr_loopback
)) {
931 so
->so_faddr6
= slirp
->vhost_addr6
;