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git.proxmox.com Git - mirror_qemu.git/blob - slirp/slirp.c
e63c5e8fc6493cca13a330ba5592b8e5dbc34b45
4 * Copyright (c) 2004-2008 Fabrice Bellard
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
24 #include "qemu/osdep.h"
25 #include "qemu-common.h"
26 #include "qemu/timer.h"
27 #include "qemu/error-report.h"
28 #include "sysemu/char.h"
31 #include "qemu/cutils.h"
33 /* host loopback address */
34 struct in_addr loopback_addr
;
35 /* host loopback network mask */
36 unsigned long loopback_mask
;
38 /* emulated hosts use the MAC addr 52:55:IP:IP:IP:IP */
39 static const uint8_t special_ethaddr
[ETH_ALEN
] = {
40 0x52, 0x55, 0x00, 0x00, 0x00, 0x00
45 static QTAILQ_HEAD(slirp_instances
, Slirp
) slirp_instances
=
46 QTAILQ_HEAD_INITIALIZER(slirp_instances
);
48 static struct in_addr dns_addr
;
49 static u_int dns_addr_time
;
51 #define TIMEOUT_FAST 2 /* milliseconds */
52 #define TIMEOUT_SLOW 499 /* milliseconds */
53 /* for the aging of certain requests like DNS */
54 #define TIMEOUT_DEFAULT 1000 /* milliseconds */
58 int get_dns_addr(struct in_addr
*pdns_addr
)
60 FIXED_INFO
*FixedInfo
=NULL
;
63 IP_ADDR_STRING
*pIPAddr
;
64 struct in_addr tmp_addr
;
66 if (dns_addr
.s_addr
!= 0 && (curtime
- dns_addr_time
) < TIMEOUT_DEFAULT
) {
67 *pdns_addr
= dns_addr
;
71 FixedInfo
= (FIXED_INFO
*)GlobalAlloc(GPTR
, sizeof(FIXED_INFO
));
72 BufLen
= sizeof(FIXED_INFO
);
74 if (ERROR_BUFFER_OVERFLOW
== GetNetworkParams(FixedInfo
, &BufLen
)) {
76 GlobalFree(FixedInfo
);
79 FixedInfo
= GlobalAlloc(GPTR
, BufLen
);
82 if ((ret
= GetNetworkParams(FixedInfo
, &BufLen
)) != ERROR_SUCCESS
) {
83 printf("GetNetworkParams failed. ret = %08x\n", (u_int
)ret
);
85 GlobalFree(FixedInfo
);
91 pIPAddr
= &(FixedInfo
->DnsServerList
);
92 inet_aton(pIPAddr
->IpAddress
.String
, &tmp_addr
);
93 *pdns_addr
= tmp_addr
;
95 dns_addr_time
= curtime
;
97 GlobalFree(FixedInfo
);
103 static void winsock_cleanup(void)
110 static struct stat dns_addr_stat
;
112 static int get_dns_addr_cached(struct in_addr
*pdns_addr
)
114 struct stat old_stat
;
115 if (curtime
- dns_addr_time
< TIMEOUT_DEFAULT
) {
116 *pdns_addr
= dns_addr
;
119 old_stat
= dns_addr_stat
;
120 if (stat("/etc/resolv.conf", &dns_addr_stat
) != 0) {
123 if (dns_addr_stat
.st_dev
== old_stat
.st_dev
124 && dns_addr_stat
.st_ino
== old_stat
.st_ino
125 && dns_addr_stat
.st_size
== old_stat
.st_size
126 && dns_addr_stat
.st_mtime
== old_stat
.st_mtime
) {
127 *pdns_addr
= dns_addr
;
133 static int get_dns_addr_resolv_conf(struct in_addr
*pdns_addr
)
139 struct in_addr tmp_addr
;
141 f
= fopen("/etc/resolv.conf", "r");
146 fprintf(stderr
, "IP address of your DNS(s): ");
148 while (fgets(buff
, 512, f
) != NULL
) {
149 if (sscanf(buff
, "nameserver%*[ \t]%256s", buff2
) == 1) {
150 if (!inet_aton(buff2
, &tmp_addr
))
152 /* If it's the first one, set it to dns_addr */
154 *pdns_addr
= tmp_addr
;
156 dns_addr_time
= curtime
;
160 fprintf(stderr
, ", ");
164 fprintf(stderr
, "(more)");
170 fprintf(stderr
, "%s", inet_ntoa(tmp_addr
));
180 int get_dns_addr(struct in_addr
*pdns_addr
)
182 if (dns_addr
.s_addr
!= 0) {
184 ret
= get_dns_addr_cached(pdns_addr
);
189 return get_dns_addr_resolv_conf(pdns_addr
);
194 static void slirp_init_once(void)
196 static int initialized
;
207 WSAStartup(MAKEWORD(2,0), &Data
);
208 atexit(winsock_cleanup
);
211 loopback_addr
.s_addr
= htonl(INADDR_LOOPBACK
);
212 loopback_mask
= htonl(IN_CLASSA_NET
);
215 static void slirp_state_save(QEMUFile
*f
, void *opaque
);
216 static int slirp_state_load(QEMUFile
*f
, void *opaque
, int version_id
);
218 Slirp
*slirp_init(int restricted
, bool in_enabled
, struct in_addr vnetwork
,
219 struct in_addr vnetmask
, struct in_addr vhost
,
221 struct in6_addr vprefix_addr6
, uint8_t vprefix_len
,
222 struct in6_addr vhost6
, const char *vhostname
,
223 const char *tftp_path
, const char *bootfile
,
224 struct in_addr vdhcp_start
, struct in_addr vnameserver
,
225 struct in6_addr vnameserver6
, const char **vdnssearch
,
228 Slirp
*slirp
= g_malloc0(sizeof(Slirp
));
232 slirp
->grand
= g_rand_new();
233 slirp
->restricted
= restricted
;
235 slirp
->in_enabled
= in_enabled
;
236 slirp
->in6_enabled
= in6_enabled
;
242 /* Initialise mbufs *after* setting the MTU */
245 slirp
->vnetwork_addr
= vnetwork
;
246 slirp
->vnetwork_mask
= vnetmask
;
247 slirp
->vhost_addr
= vhost
;
248 slirp
->vprefix_addr6
= vprefix_addr6
;
249 slirp
->vprefix_len
= vprefix_len
;
250 slirp
->vhost_addr6
= vhost6
;
252 pstrcpy(slirp
->client_hostname
, sizeof(slirp
->client_hostname
),
255 slirp
->tftp_prefix
= g_strdup(tftp_path
);
256 slirp
->bootp_filename
= g_strdup(bootfile
);
257 slirp
->vdhcp_startaddr
= vdhcp_start
;
258 slirp
->vnameserver_addr
= vnameserver
;
259 slirp
->vnameserver_addr6
= vnameserver6
;
262 translate_dnssearch(slirp
, vdnssearch
);
265 slirp
->opaque
= opaque
;
267 register_savevm(NULL
, "slirp", 0, 4,
268 slirp_state_save
, slirp_state_load
, slirp
);
270 QTAILQ_INSERT_TAIL(&slirp_instances
, slirp
, entry
);
275 void slirp_cleanup(Slirp
*slirp
)
277 QTAILQ_REMOVE(&slirp_instances
, slirp
, entry
);
279 unregister_savevm(NULL
, "slirp", slirp
);
285 g_rand_free(slirp
->grand
);
287 g_free(slirp
->vdnssearch
);
288 g_free(slirp
->tftp_prefix
);
289 g_free(slirp
->bootp_filename
);
293 #define CONN_CANFSEND(so) (((so)->so_state & (SS_FCANTSENDMORE|SS_ISFCONNECTED)) == SS_ISFCONNECTED)
294 #define CONN_CANFRCV(so) (((so)->so_state & (SS_FCANTRCVMORE|SS_ISFCONNECTED)) == SS_ISFCONNECTED)
296 static void slirp_update_timeout(uint32_t *timeout
)
301 if (*timeout
<= TIMEOUT_FAST
) {
305 t
= MIN(1000, *timeout
);
307 /* If we have tcp timeout with slirp, then we will fill @timeout with
308 * more precise value.
310 QTAILQ_FOREACH(slirp
, &slirp_instances
, entry
) {
311 if (slirp
->time_fasttimo
) {
312 *timeout
= TIMEOUT_FAST
;
315 if (slirp
->do_slowtimo
) {
316 t
= MIN(TIMEOUT_SLOW
, t
);
322 void slirp_pollfds_fill(GArray
*pollfds
, uint32_t *timeout
)
325 struct socket
*so
, *so_next
;
327 if (QTAILQ_EMPTY(&slirp_instances
)) {
335 QTAILQ_FOREACH(slirp
, &slirp_instances
, entry
) {
337 * *_slowtimo needs calling if there are IP fragments
338 * in the fragment queue, or there are TCP connections active
340 slirp
->do_slowtimo
= ((slirp
->tcb
.so_next
!= &slirp
->tcb
) ||
341 (&slirp
->ipq
.ip_link
!= slirp
->ipq
.ip_link
.next
));
343 for (so
= slirp
->tcb
.so_next
; so
!= &slirp
->tcb
;
347 so_next
= so
->so_next
;
349 so
->pollfds_idx
= -1;
352 * See if we need a tcp_fasttimo
354 if (slirp
->time_fasttimo
== 0 &&
355 so
->so_tcpcb
->t_flags
& TF_DELACK
) {
356 slirp
->time_fasttimo
= curtime
; /* Flag when want a fasttimo */
360 * NOFDREF can include still connecting to local-host,
361 * newly socreated() sockets etc. Don't want to select these.
363 if (so
->so_state
& SS_NOFDREF
|| so
->s
== -1) {
368 * Set for reading sockets which are accepting
370 if (so
->so_state
& SS_FACCEPTCONN
) {
373 .events
= G_IO_IN
| G_IO_HUP
| G_IO_ERR
,
375 so
->pollfds_idx
= pollfds
->len
;
376 g_array_append_val(pollfds
, pfd
);
381 * Set for writing sockets which are connecting
383 if (so
->so_state
& SS_ISFCONNECTING
) {
386 .events
= G_IO_OUT
| G_IO_ERR
,
388 so
->pollfds_idx
= pollfds
->len
;
389 g_array_append_val(pollfds
, pfd
);
394 * Set for writing if we are connected, can send more, and
395 * we have something to send
397 if (CONN_CANFSEND(so
) && so
->so_rcv
.sb_cc
) {
398 events
|= G_IO_OUT
| G_IO_ERR
;
402 * Set for reading (and urgent data) if we are connected, can
403 * receive more, and we have room for it XXX /2 ?
405 if (CONN_CANFRCV(so
) &&
406 (so
->so_snd
.sb_cc
< (so
->so_snd
.sb_datalen
/2))) {
407 events
|= G_IO_IN
| G_IO_HUP
| G_IO_ERR
| G_IO_PRI
;
415 so
->pollfds_idx
= pollfds
->len
;
416 g_array_append_val(pollfds
, pfd
);
423 for (so
= slirp
->udb
.so_next
; so
!= &slirp
->udb
;
425 so_next
= so
->so_next
;
427 so
->pollfds_idx
= -1;
430 * See if it's timed out
433 if (so
->so_expire
<= curtime
) {
437 slirp
->do_slowtimo
= true; /* Let socket expire */
442 * When UDP packets are received from over the
443 * link, they're sendto()'d straight away, so
444 * no need for setting for writing
445 * Limit the number of packets queued by this session
446 * to 4. Note that even though we try and limit this
447 * to 4 packets, the session could have more queued
448 * if the packets needed to be fragmented
451 if ((so
->so_state
& SS_ISFCONNECTED
) && so
->so_queued
<= 4) {
454 .events
= G_IO_IN
| G_IO_HUP
| G_IO_ERR
,
456 so
->pollfds_idx
= pollfds
->len
;
457 g_array_append_val(pollfds
, pfd
);
464 for (so
= slirp
->icmp
.so_next
; so
!= &slirp
->icmp
;
466 so_next
= so
->so_next
;
468 so
->pollfds_idx
= -1;
471 * See if it's timed out
474 if (so
->so_expire
<= curtime
) {
478 slirp
->do_slowtimo
= true; /* Let socket expire */
482 if (so
->so_state
& SS_ISFCONNECTED
) {
485 .events
= G_IO_IN
| G_IO_HUP
| G_IO_ERR
,
487 so
->pollfds_idx
= pollfds
->len
;
488 g_array_append_val(pollfds
, pfd
);
492 slirp_update_timeout(timeout
);
495 void slirp_pollfds_poll(GArray
*pollfds
, int select_error
)
498 struct socket
*so
, *so_next
;
501 if (QTAILQ_EMPTY(&slirp_instances
)) {
505 curtime
= qemu_clock_get_ms(QEMU_CLOCK_REALTIME
);
507 QTAILQ_FOREACH(slirp
, &slirp_instances
, entry
) {
509 * See if anything has timed out
511 if (slirp
->time_fasttimo
&&
512 ((curtime
- slirp
->time_fasttimo
) >= TIMEOUT_FAST
)) {
514 slirp
->time_fasttimo
= 0;
516 if (slirp
->do_slowtimo
&&
517 ((curtime
- slirp
->last_slowtimo
) >= TIMEOUT_SLOW
)) {
520 slirp
->last_slowtimo
= curtime
;
530 for (so
= slirp
->tcb
.so_next
; so
!= &slirp
->tcb
;
534 so_next
= so
->so_next
;
537 if (so
->pollfds_idx
!= -1) {
538 revents
= g_array_index(pollfds
, GPollFD
,
539 so
->pollfds_idx
).revents
;
542 if (so
->so_state
& SS_NOFDREF
|| so
->s
== -1) {
548 * This will soread as well, so no need to
549 * test for G_IO_IN below if this succeeds
551 if (revents
& G_IO_PRI
) {
554 /* Socket error might have resulted in the socket being
555 * removed, do not try to do anything more with it. */
560 * Check sockets for reading
562 else if (revents
& (G_IO_IN
| G_IO_HUP
| G_IO_ERR
)) {
564 * Check for incoming connections
566 if (so
->so_state
& SS_FACCEPTCONN
) {
572 /* Output it if we read something */
574 tcp_output(sototcpcb(so
));
577 /* Socket error might have resulted in the socket being
578 * removed, do not try to do anything more with it. */
584 * Check sockets for writing
586 if (!(so
->so_state
& SS_NOFDREF
) &&
587 (revents
& (G_IO_OUT
| G_IO_ERR
))) {
589 * Check for non-blocking, still-connecting sockets
591 if (so
->so_state
& SS_ISFCONNECTING
) {
593 so
->so_state
&= ~SS_ISFCONNECTING
;
595 ret
= send(so
->s
, (const void *) &ret
, 0, 0);
597 /* XXXXX Must fix, zero bytes is a NOP */
598 if (errno
== EAGAIN
|| errno
== EWOULDBLOCK
||
599 errno
== EINPROGRESS
|| errno
== ENOTCONN
) {
604 so
->so_state
&= SS_PERSISTENT_MASK
;
605 so
->so_state
|= SS_NOFDREF
;
607 /* else so->so_state &= ~SS_ISFCONNECTING; */
612 tcp_input((struct mbuf
*)NULL
, sizeof(struct ip
), so
,
619 * XXXXX If we wrote something (a lot), there
620 * could be a need for a window update.
621 * In the worst case, the remote will send
622 * a window probe to get things going again
627 * Probe a still-connecting, non-blocking socket
628 * to check if it's still alive
631 if (so
->so_state
& SS_ISFCONNECTING
) {
632 ret
= qemu_recv(so
->s
, &ret
, 0, 0);
636 if (errno
== EAGAIN
|| errno
== EWOULDBLOCK
||
637 errno
== EINPROGRESS
|| errno
== ENOTCONN
) {
638 continue; /* Still connecting, continue */
642 so
->so_state
&= SS_PERSISTENT_MASK
;
643 so
->so_state
|= SS_NOFDREF
;
645 /* tcp_input will take care of it */
647 ret
= send(so
->s
, &ret
, 0, 0);
650 if (errno
== EAGAIN
|| errno
== EWOULDBLOCK
||
651 errno
== EINPROGRESS
|| errno
== ENOTCONN
) {
655 so
->so_state
&= SS_PERSISTENT_MASK
;
656 so
->so_state
|= SS_NOFDREF
;
658 so
->so_state
&= ~SS_ISFCONNECTING
;
662 tcp_input((struct mbuf
*)NULL
, sizeof(struct ip
), so
,
664 } /* SS_ISFCONNECTING */
670 * Incoming packets are sent straight away, they're not buffered.
671 * Incoming UDP data isn't buffered either.
673 for (so
= slirp
->udb
.so_next
; so
!= &slirp
->udb
;
677 so_next
= so
->so_next
;
680 if (so
->pollfds_idx
!= -1) {
681 revents
= g_array_index(pollfds
, GPollFD
,
682 so
->pollfds_idx
).revents
;
686 (revents
& (G_IO_IN
| G_IO_HUP
| G_IO_ERR
))) {
692 * Check incoming ICMP relies.
694 for (so
= slirp
->icmp
.so_next
; so
!= &slirp
->icmp
;
698 so_next
= so
->so_next
;
701 if (so
->pollfds_idx
!= -1) {
702 revents
= g_array_index(pollfds
, GPollFD
,
703 so
->pollfds_idx
).revents
;
707 (revents
& (G_IO_IN
| G_IO_HUP
| G_IO_ERR
))) {
717 static void arp_input(Slirp
*slirp
, const uint8_t *pkt
, int pkt_len
)
719 struct arphdr
*ah
= (struct arphdr
*)(pkt
+ ETH_HLEN
);
720 uint8_t arp_reply
[max(ETH_HLEN
+ sizeof(struct arphdr
), 64)];
721 struct ethhdr
*reh
= (struct ethhdr
*)arp_reply
;
722 struct arphdr
*rah
= (struct arphdr
*)(arp_reply
+ ETH_HLEN
);
724 struct ex_list
*ex_ptr
;
726 if (!slirp
->in_enabled
) {
730 ar_op
= ntohs(ah
->ar_op
);
733 if (ah
->ar_tip
== ah
->ar_sip
) {
735 arp_table_add(slirp
, ah
->ar_sip
, ah
->ar_sha
);
739 if ((ah
->ar_tip
& slirp
->vnetwork_mask
.s_addr
) ==
740 slirp
->vnetwork_addr
.s_addr
) {
741 if (ah
->ar_tip
== slirp
->vnameserver_addr
.s_addr
||
742 ah
->ar_tip
== slirp
->vhost_addr
.s_addr
)
744 for (ex_ptr
= slirp
->exec_list
; ex_ptr
; ex_ptr
= ex_ptr
->ex_next
) {
745 if (ex_ptr
->ex_addr
.s_addr
== ah
->ar_tip
)
750 memset(arp_reply
, 0, sizeof(arp_reply
));
752 arp_table_add(slirp
, ah
->ar_sip
, ah
->ar_sha
);
754 /* ARP request for alias/dns mac address */
755 memcpy(reh
->h_dest
, pkt
+ ETH_ALEN
, ETH_ALEN
);
756 memcpy(reh
->h_source
, special_ethaddr
, ETH_ALEN
- 4);
757 memcpy(&reh
->h_source
[2], &ah
->ar_tip
, 4);
758 reh
->h_proto
= htons(ETH_P_ARP
);
760 rah
->ar_hrd
= htons(1);
761 rah
->ar_pro
= htons(ETH_P_IP
);
762 rah
->ar_hln
= ETH_ALEN
;
764 rah
->ar_op
= htons(ARPOP_REPLY
);
765 memcpy(rah
->ar_sha
, reh
->h_source
, ETH_ALEN
);
766 rah
->ar_sip
= ah
->ar_tip
;
767 memcpy(rah
->ar_tha
, ah
->ar_sha
, ETH_ALEN
);
768 rah
->ar_tip
= ah
->ar_sip
;
769 slirp_output(slirp
->opaque
, arp_reply
, sizeof(arp_reply
));
773 arp_table_add(slirp
, ah
->ar_sip
, ah
->ar_sha
);
780 void slirp_input(Slirp
*slirp
, const uint8_t *pkt
, int pkt_len
)
785 if (pkt_len
< ETH_HLEN
)
788 proto
= ntohs(*(uint16_t *)(pkt
+ 12));
791 arp_input(slirp
, pkt
, pkt_len
);
798 /* Note: we add 2 to align the IP header on 4 bytes,
799 * and add the margin for the tcpiphdr overhead */
800 if (M_FREEROOM(m
) < pkt_len
+ TCPIPHDR_DELTA
+ 2) {
801 m_inc(m
, pkt_len
+ TCPIPHDR_DELTA
+ 2);
803 m
->m_len
= pkt_len
+ TCPIPHDR_DELTA
+ 2;
804 memcpy(m
->m_data
+ TCPIPHDR_DELTA
+ 2, pkt
, pkt_len
);
806 m
->m_data
+= TCPIPHDR_DELTA
+ 2 + ETH_HLEN
;
807 m
->m_len
-= TCPIPHDR_DELTA
+ 2 + ETH_HLEN
;
809 if (proto
== ETH_P_IP
) {
811 } else if (proto
== ETH_P_IPV6
) {
821 /* Prepare the IPv4 packet to be sent to the ethernet device. Returns 1 if no
822 * packet should be sent, 0 if the packet must be re-queued, 2 if the packet
825 static int if_encap4(Slirp
*slirp
, struct mbuf
*ifm
, struct ethhdr
*eh
,
826 uint8_t ethaddr
[ETH_ALEN
])
828 const struct ip
*iph
= (const struct ip
*)ifm
->m_data
;
830 if (iph
->ip_dst
.s_addr
== 0) {
831 /* 0.0.0.0 can not be a destination address, something went wrong,
832 * avoid making it worse */
835 if (!arp_table_search(slirp
, iph
->ip_dst
.s_addr
, ethaddr
)) {
836 uint8_t arp_req
[ETH_HLEN
+ sizeof(struct arphdr
)];
837 struct ethhdr
*reh
= (struct ethhdr
*)arp_req
;
838 struct arphdr
*rah
= (struct arphdr
*)(arp_req
+ ETH_HLEN
);
840 if (!ifm
->resolution_requested
) {
841 /* If the client addr is not known, send an ARP request */
842 memset(reh
->h_dest
, 0xff, ETH_ALEN
);
843 memcpy(reh
->h_source
, special_ethaddr
, ETH_ALEN
- 4);
844 memcpy(&reh
->h_source
[2], &slirp
->vhost_addr
, 4);
845 reh
->h_proto
= htons(ETH_P_ARP
);
846 rah
->ar_hrd
= htons(1);
847 rah
->ar_pro
= htons(ETH_P_IP
);
848 rah
->ar_hln
= ETH_ALEN
;
850 rah
->ar_op
= htons(ARPOP_REQUEST
);
853 memcpy(rah
->ar_sha
, special_ethaddr
, ETH_ALEN
- 4);
854 memcpy(&rah
->ar_sha
[2], &slirp
->vhost_addr
, 4);
857 rah
->ar_sip
= slirp
->vhost_addr
.s_addr
;
859 /* target hw addr (none) */
860 memset(rah
->ar_tha
, 0, ETH_ALEN
);
863 rah
->ar_tip
= iph
->ip_dst
.s_addr
;
864 slirp
->client_ipaddr
= iph
->ip_dst
;
865 slirp_output(slirp
->opaque
, arp_req
, sizeof(arp_req
));
866 ifm
->resolution_requested
= true;
868 /* Expire request and drop outgoing packet after 1 second */
869 ifm
->expiration_date
= qemu_clock_get_ns(QEMU_CLOCK_REALTIME
) + 1000000000ULL;
873 memcpy(eh
->h_source
, special_ethaddr
, ETH_ALEN
- 4);
874 /* XXX: not correct */
875 memcpy(&eh
->h_source
[2], &slirp
->vhost_addr
, 4);
876 eh
->h_proto
= htons(ETH_P_IP
);
883 /* Prepare the IPv6 packet to be sent to the ethernet device. Returns 1 if no
884 * packet should be sent, 0 if the packet must be re-queued, 2 if the packet
887 static int if_encap6(Slirp
*slirp
, struct mbuf
*ifm
, struct ethhdr
*eh
,
888 uint8_t ethaddr
[ETH_ALEN
])
890 const struct ip6
*ip6h
= mtod(ifm
, const struct ip6
*);
891 if (!ndp_table_search(slirp
, ip6h
->ip_dst
, ethaddr
)) {
892 if (!ifm
->resolution_requested
) {
893 ndp_send_ns(slirp
, ip6h
->ip_dst
);
894 ifm
->resolution_requested
= true;
895 ifm
->expiration_date
=
896 qemu_clock_get_ns(QEMU_CLOCK_REALTIME
) + 1000000000ULL;
900 eh
->h_proto
= htons(ETH_P_IPV6
);
901 in6_compute_ethaddr(ip6h
->ip_src
, eh
->h_source
);
908 /* Output the IP packet to the ethernet device. Returns 0 if the packet must be
911 int if_encap(Slirp
*slirp
, struct mbuf
*ifm
)
914 struct ethhdr
*eh
= (struct ethhdr
*)buf
;
915 uint8_t ethaddr
[ETH_ALEN
];
916 const struct ip
*iph
= (const struct ip
*)ifm
->m_data
;
919 if (ifm
->m_len
+ ETH_HLEN
> sizeof(buf
)) {
925 ret
= if_encap4(slirp
, ifm
, eh
, ethaddr
);
932 ret
= if_encap6(slirp
, ifm
, eh
, ethaddr
);
939 g_assert_not_reached();
943 memcpy(eh
->h_dest
, ethaddr
, ETH_ALEN
);
944 DEBUG_ARGS((dfd
, " src = %02x:%02x:%02x:%02x:%02x:%02x\n",
945 eh
->h_source
[0], eh
->h_source
[1], eh
->h_source
[2],
946 eh
->h_source
[3], eh
->h_source
[4], eh
->h_source
[5]));
947 DEBUG_ARGS((dfd
, " dst = %02x:%02x:%02x:%02x:%02x:%02x\n",
948 eh
->h_dest
[0], eh
->h_dest
[1], eh
->h_dest
[2],
949 eh
->h_dest
[3], eh
->h_dest
[4], eh
->h_dest
[5]));
950 memcpy(buf
+ sizeof(struct ethhdr
), ifm
->m_data
, ifm
->m_len
);
951 slirp_output(slirp
->opaque
, buf
, ifm
->m_len
+ ETH_HLEN
);
955 /* Drop host forwarding rule, return 0 if found. */
956 int slirp_remove_hostfwd(Slirp
*slirp
, int is_udp
, struct in_addr host_addr
,
960 struct socket
*head
= (is_udp
? &slirp
->udb
: &slirp
->tcb
);
961 struct sockaddr_in addr
;
962 int port
= htons(host_port
);
965 for (so
= head
->so_next
; so
!= head
; so
= so
->so_next
) {
966 addr_len
= sizeof(addr
);
967 if ((so
->so_state
& SS_HOSTFWD
) &&
968 getsockname(so
->s
, (struct sockaddr
*)&addr
, &addr_len
) == 0 &&
969 addr
.sin_addr
.s_addr
== host_addr
.s_addr
&&
970 addr
.sin_port
== port
) {
980 int slirp_add_hostfwd(Slirp
*slirp
, int is_udp
, struct in_addr host_addr
,
981 int host_port
, struct in_addr guest_addr
, int guest_port
)
983 if (!guest_addr
.s_addr
) {
984 guest_addr
= slirp
->vdhcp_startaddr
;
987 if (!udp_listen(slirp
, host_addr
.s_addr
, htons(host_port
),
988 guest_addr
.s_addr
, htons(guest_port
), SS_HOSTFWD
))
991 if (!tcp_listen(slirp
, host_addr
.s_addr
, htons(host_port
),
992 guest_addr
.s_addr
, htons(guest_port
), SS_HOSTFWD
))
998 int slirp_add_exec(Slirp
*slirp
, int do_pty
, const void *args
,
999 struct in_addr
*guest_addr
, int guest_port
)
1001 if (!guest_addr
->s_addr
) {
1002 guest_addr
->s_addr
= slirp
->vnetwork_addr
.s_addr
|
1003 (htonl(0x0204) & ~slirp
->vnetwork_mask
.s_addr
);
1005 if ((guest_addr
->s_addr
& slirp
->vnetwork_mask
.s_addr
) !=
1006 slirp
->vnetwork_addr
.s_addr
||
1007 guest_addr
->s_addr
== slirp
->vhost_addr
.s_addr
||
1008 guest_addr
->s_addr
== slirp
->vnameserver_addr
.s_addr
) {
1011 return add_exec(&slirp
->exec_list
, do_pty
, (char *)args
, *guest_addr
,
1015 ssize_t
slirp_send(struct socket
*so
, const void *buf
, size_t len
, int flags
)
1017 if (so
->s
== -1 && so
->extra
) {
1018 qemu_chr_fe_write(so
->extra
, buf
, len
);
1022 return send(so
->s
, buf
, len
, flags
);
1025 static struct socket
*
1026 slirp_find_ctl_socket(Slirp
*slirp
, struct in_addr guest_addr
, int guest_port
)
1030 for (so
= slirp
->tcb
.so_next
; so
!= &slirp
->tcb
; so
= so
->so_next
) {
1031 if (so
->so_faddr
.s_addr
== guest_addr
.s_addr
&&
1032 htons(so
->so_fport
) == guest_port
) {
1039 size_t slirp_socket_can_recv(Slirp
*slirp
, struct in_addr guest_addr
,
1042 struct iovec iov
[2];
1045 so
= slirp_find_ctl_socket(slirp
, guest_addr
, guest_port
);
1047 if (!so
|| so
->so_state
& SS_NOFDREF
) {
1051 if (!CONN_CANFRCV(so
) || so
->so_snd
.sb_cc
>= (so
->so_snd
.sb_datalen
/2)) {
1055 return sopreprbuf(so
, iov
, NULL
);
1058 void slirp_socket_recv(Slirp
*slirp
, struct in_addr guest_addr
, int guest_port
,
1059 const uint8_t *buf
, int size
)
1062 struct socket
*so
= slirp_find_ctl_socket(slirp
, guest_addr
, guest_port
);
1067 ret
= soreadbuf(so
, (const char *)buf
, size
);
1070 tcp_output(sototcpcb(so
));
1073 static void slirp_tcp_save(QEMUFile
*f
, struct tcpcb
*tp
)
1077 qemu_put_sbe16(f
, tp
->t_state
);
1078 for (i
= 0; i
< TCPT_NTIMERS
; i
++)
1079 qemu_put_sbe16(f
, tp
->t_timer
[i
]);
1080 qemu_put_sbe16(f
, tp
->t_rxtshift
);
1081 qemu_put_sbe16(f
, tp
->t_rxtcur
);
1082 qemu_put_sbe16(f
, tp
->t_dupacks
);
1083 qemu_put_be16(f
, tp
->t_maxseg
);
1084 qemu_put_sbyte(f
, tp
->t_force
);
1085 qemu_put_be16(f
, tp
->t_flags
);
1086 qemu_put_be32(f
, tp
->snd_una
);
1087 qemu_put_be32(f
, tp
->snd_nxt
);
1088 qemu_put_be32(f
, tp
->snd_up
);
1089 qemu_put_be32(f
, tp
->snd_wl1
);
1090 qemu_put_be32(f
, tp
->snd_wl2
);
1091 qemu_put_be32(f
, tp
->iss
);
1092 qemu_put_be32(f
, tp
->snd_wnd
);
1093 qemu_put_be32(f
, tp
->rcv_wnd
);
1094 qemu_put_be32(f
, tp
->rcv_nxt
);
1095 qemu_put_be32(f
, tp
->rcv_up
);
1096 qemu_put_be32(f
, tp
->irs
);
1097 qemu_put_be32(f
, tp
->rcv_adv
);
1098 qemu_put_be32(f
, tp
->snd_max
);
1099 qemu_put_be32(f
, tp
->snd_cwnd
);
1100 qemu_put_be32(f
, tp
->snd_ssthresh
);
1101 qemu_put_sbe16(f
, tp
->t_idle
);
1102 qemu_put_sbe16(f
, tp
->t_rtt
);
1103 qemu_put_be32(f
, tp
->t_rtseq
);
1104 qemu_put_sbe16(f
, tp
->t_srtt
);
1105 qemu_put_sbe16(f
, tp
->t_rttvar
);
1106 qemu_put_be16(f
, tp
->t_rttmin
);
1107 qemu_put_be32(f
, tp
->max_sndwnd
);
1108 qemu_put_byte(f
, tp
->t_oobflags
);
1109 qemu_put_byte(f
, tp
->t_iobc
);
1110 qemu_put_sbe16(f
, tp
->t_softerror
);
1111 qemu_put_byte(f
, tp
->snd_scale
);
1112 qemu_put_byte(f
, tp
->rcv_scale
);
1113 qemu_put_byte(f
, tp
->request_r_scale
);
1114 qemu_put_byte(f
, tp
->requested_s_scale
);
1115 qemu_put_be32(f
, tp
->ts_recent
);
1116 qemu_put_be32(f
, tp
->ts_recent_age
);
1117 qemu_put_be32(f
, tp
->last_ack_sent
);
1120 static void slirp_sbuf_save(QEMUFile
*f
, struct sbuf
*sbuf
)
1124 qemu_put_be32(f
, sbuf
->sb_cc
);
1125 qemu_put_be32(f
, sbuf
->sb_datalen
);
1126 off
= (uint32_t)(sbuf
->sb_wptr
- sbuf
->sb_data
);
1127 qemu_put_sbe32(f
, off
);
1128 off
= (uint32_t)(sbuf
->sb_rptr
- sbuf
->sb_data
);
1129 qemu_put_sbe32(f
, off
);
1130 qemu_put_buffer(f
, (unsigned char*)sbuf
->sb_data
, sbuf
->sb_datalen
);
1133 static void slirp_socket_save(QEMUFile
*f
, struct socket
*so
)
1135 qemu_put_be32(f
, so
->so_urgc
);
1136 qemu_put_be16(f
, so
->so_ffamily
);
1137 switch (so
->so_ffamily
) {
1139 qemu_put_be32(f
, so
->so_faddr
.s_addr
);
1140 qemu_put_be16(f
, so
->so_fport
);
1144 "so_ffamily unknown, unable to save so_faddr and so_fport\n");
1146 qemu_put_be16(f
, so
->so_lfamily
);
1147 switch (so
->so_lfamily
) {
1149 qemu_put_be32(f
, so
->so_laddr
.s_addr
);
1150 qemu_put_be16(f
, so
->so_lport
);
1154 "so_ffamily unknown, unable to save so_laddr and so_lport\n");
1156 qemu_put_byte(f
, so
->so_iptos
);
1157 qemu_put_byte(f
, so
->so_emu
);
1158 qemu_put_byte(f
, so
->so_type
);
1159 qemu_put_be32(f
, so
->so_state
);
1160 slirp_sbuf_save(f
, &so
->so_rcv
);
1161 slirp_sbuf_save(f
, &so
->so_snd
);
1162 slirp_tcp_save(f
, so
->so_tcpcb
);
1165 static void slirp_bootp_save(QEMUFile
*f
, Slirp
*slirp
)
1169 for (i
= 0; i
< NB_BOOTP_CLIENTS
; i
++) {
1170 qemu_put_be16(f
, slirp
->bootp_clients
[i
].allocated
);
1171 qemu_put_buffer(f
, slirp
->bootp_clients
[i
].macaddr
, 6);
1175 static void slirp_state_save(QEMUFile
*f
, void *opaque
)
1177 Slirp
*slirp
= opaque
;
1178 struct ex_list
*ex_ptr
;
1180 for (ex_ptr
= slirp
->exec_list
; ex_ptr
; ex_ptr
= ex_ptr
->ex_next
)
1181 if (ex_ptr
->ex_pty
== 3) {
1183 so
= slirp_find_ctl_socket(slirp
, ex_ptr
->ex_addr
,
1184 ntohs(ex_ptr
->ex_fport
));
1188 qemu_put_byte(f
, 42);
1189 slirp_socket_save(f
, so
);
1191 qemu_put_byte(f
, 0);
1193 qemu_put_be16(f
, slirp
->ip_id
);
1195 slirp_bootp_save(f
, slirp
);
1198 static void slirp_tcp_load(QEMUFile
*f
, struct tcpcb
*tp
)
1202 tp
->t_state
= qemu_get_sbe16(f
);
1203 for (i
= 0; i
< TCPT_NTIMERS
; i
++)
1204 tp
->t_timer
[i
] = qemu_get_sbe16(f
);
1205 tp
->t_rxtshift
= qemu_get_sbe16(f
);
1206 tp
->t_rxtcur
= qemu_get_sbe16(f
);
1207 tp
->t_dupacks
= qemu_get_sbe16(f
);
1208 tp
->t_maxseg
= qemu_get_be16(f
);
1209 tp
->t_force
= qemu_get_sbyte(f
);
1210 tp
->t_flags
= qemu_get_be16(f
);
1211 tp
->snd_una
= qemu_get_be32(f
);
1212 tp
->snd_nxt
= qemu_get_be32(f
);
1213 tp
->snd_up
= qemu_get_be32(f
);
1214 tp
->snd_wl1
= qemu_get_be32(f
);
1215 tp
->snd_wl2
= qemu_get_be32(f
);
1216 tp
->iss
= qemu_get_be32(f
);
1217 tp
->snd_wnd
= qemu_get_be32(f
);
1218 tp
->rcv_wnd
= qemu_get_be32(f
);
1219 tp
->rcv_nxt
= qemu_get_be32(f
);
1220 tp
->rcv_up
= qemu_get_be32(f
);
1221 tp
->irs
= qemu_get_be32(f
);
1222 tp
->rcv_adv
= qemu_get_be32(f
);
1223 tp
->snd_max
= qemu_get_be32(f
);
1224 tp
->snd_cwnd
= qemu_get_be32(f
);
1225 tp
->snd_ssthresh
= qemu_get_be32(f
);
1226 tp
->t_idle
= qemu_get_sbe16(f
);
1227 tp
->t_rtt
= qemu_get_sbe16(f
);
1228 tp
->t_rtseq
= qemu_get_be32(f
);
1229 tp
->t_srtt
= qemu_get_sbe16(f
);
1230 tp
->t_rttvar
= qemu_get_sbe16(f
);
1231 tp
->t_rttmin
= qemu_get_be16(f
);
1232 tp
->max_sndwnd
= qemu_get_be32(f
);
1233 tp
->t_oobflags
= qemu_get_byte(f
);
1234 tp
->t_iobc
= qemu_get_byte(f
);
1235 tp
->t_softerror
= qemu_get_sbe16(f
);
1236 tp
->snd_scale
= qemu_get_byte(f
);
1237 tp
->rcv_scale
= qemu_get_byte(f
);
1238 tp
->request_r_scale
= qemu_get_byte(f
);
1239 tp
->requested_s_scale
= qemu_get_byte(f
);
1240 tp
->ts_recent
= qemu_get_be32(f
);
1241 tp
->ts_recent_age
= qemu_get_be32(f
);
1242 tp
->last_ack_sent
= qemu_get_be32(f
);
1246 static int slirp_sbuf_load(QEMUFile
*f
, struct sbuf
*sbuf
)
1248 uint32_t off
, sb_cc
, sb_datalen
;
1250 sb_cc
= qemu_get_be32(f
);
1251 sb_datalen
= qemu_get_be32(f
);
1253 sbreserve(sbuf
, sb_datalen
);
1255 if (sbuf
->sb_datalen
!= sb_datalen
)
1258 sbuf
->sb_cc
= sb_cc
;
1260 off
= qemu_get_sbe32(f
);
1261 sbuf
->sb_wptr
= sbuf
->sb_data
+ off
;
1262 off
= qemu_get_sbe32(f
);
1263 sbuf
->sb_rptr
= sbuf
->sb_data
+ off
;
1264 qemu_get_buffer(f
, (unsigned char*)sbuf
->sb_data
, sbuf
->sb_datalen
);
1269 static int slirp_socket_load(QEMUFile
*f
, struct socket
*so
, int version_id
)
1271 if (tcp_attach(so
) < 0)
1274 so
->so_urgc
= qemu_get_be32(f
);
1275 if (version_id
<= 3) {
1276 so
->so_ffamily
= AF_INET
;
1277 so
->so_faddr
.s_addr
= qemu_get_be32(f
);
1278 so
->so_laddr
.s_addr
= qemu_get_be32(f
);
1279 so
->so_fport
= qemu_get_be16(f
);
1280 so
->so_lport
= qemu_get_be16(f
);
1282 so
->so_ffamily
= qemu_get_be16(f
);
1283 switch (so
->so_ffamily
) {
1285 so
->so_faddr
.s_addr
= qemu_get_be32(f
);
1286 so
->so_fport
= qemu_get_be16(f
);
1290 "so_ffamily unknown, unable to restore so_faddr and so_lport");
1292 so
->so_lfamily
= qemu_get_be16(f
);
1293 switch (so
->so_lfamily
) {
1295 so
->so_laddr
.s_addr
= qemu_get_be32(f
);
1296 so
->so_lport
= qemu_get_be16(f
);
1300 "so_ffamily unknown, unable to restore so_laddr and so_lport");
1303 so
->so_iptos
= qemu_get_byte(f
);
1304 so
->so_emu
= qemu_get_byte(f
);
1305 so
->so_type
= qemu_get_byte(f
);
1306 so
->so_state
= qemu_get_be32(f
);
1307 if (slirp_sbuf_load(f
, &so
->so_rcv
) < 0)
1309 if (slirp_sbuf_load(f
, &so
->so_snd
) < 0)
1311 slirp_tcp_load(f
, so
->so_tcpcb
);
1316 static void slirp_bootp_load(QEMUFile
*f
, Slirp
*slirp
)
1320 for (i
= 0; i
< NB_BOOTP_CLIENTS
; i
++) {
1321 slirp
->bootp_clients
[i
].allocated
= qemu_get_be16(f
);
1322 qemu_get_buffer(f
, slirp
->bootp_clients
[i
].macaddr
, 6);
1326 static int slirp_state_load(QEMUFile
*f
, void *opaque
, int version_id
)
1328 Slirp
*slirp
= opaque
;
1329 struct ex_list
*ex_ptr
;
1331 while (qemu_get_byte(f
)) {
1333 struct socket
*so
= socreate(slirp
);
1338 ret
= slirp_socket_load(f
, so
, version_id
);
1343 if ((so
->so_faddr
.s_addr
& slirp
->vnetwork_mask
.s_addr
) !=
1344 slirp
->vnetwork_addr
.s_addr
) {
1347 for (ex_ptr
= slirp
->exec_list
; ex_ptr
; ex_ptr
= ex_ptr
->ex_next
) {
1348 if (ex_ptr
->ex_pty
== 3 &&
1349 so
->so_faddr
.s_addr
== ex_ptr
->ex_addr
.s_addr
&&
1350 so
->so_fport
== ex_ptr
->ex_fport
) {
1357 so
->extra
= (void *)ex_ptr
->ex_exec
;
1360 if (version_id
>= 2) {
1361 slirp
->ip_id
= qemu_get_be16(f
);
1364 if (version_id
>= 3) {
1365 slirp_bootp_load(f
, slirp
);