root / slirp / slirp.c @ 11217a75
History | View | Annotate | Download (30.6 kB)
1 |
/*
|
---|---|
2 |
* libslirp glue
|
3 |
*
|
4 |
* Copyright (c) 2004-2008 Fabrice Bellard
|
5 |
*
|
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:
|
12 |
*
|
13 |
* The above copyright notice and this permission notice shall be included in
|
14 |
* all copies or substantial portions of the Software.
|
15 |
*
|
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
|
22 |
* THE SOFTWARE.
|
23 |
*/
|
24 |
#include "qemu-common.h" |
25 |
#include "qemu-timer.h" |
26 |
#include "qemu-char.h" |
27 |
#include "slirp.h" |
28 |
#include "hw/hw.h" |
29 |
|
30 |
/* host loopback address */
|
31 |
struct in_addr loopback_addr;
|
32 |
|
33 |
/* emulated hosts use the MAC addr 52:55:IP:IP:IP:IP */
|
34 |
static const uint8_t special_ethaddr[6] = { |
35 |
0x52, 0x55, 0x00, 0x00, 0x00, 0x00 |
36 |
}; |
37 |
|
38 |
static const uint8_t zero_ethaddr[6] = { 0, 0, 0, 0, 0, 0 }; |
39 |
|
40 |
/* XXX: suppress those select globals */
|
41 |
fd_set *global_readfds, *global_writefds, *global_xfds; |
42 |
|
43 |
u_int curtime; |
44 |
static u_int time_fasttimo, last_slowtimo;
|
45 |
static int do_slowtimo; |
46 |
|
47 |
static QTAILQ_HEAD(slirp_instances, Slirp) slirp_instances =
|
48 |
QTAILQ_HEAD_INITIALIZER(slirp_instances); |
49 |
|
50 |
static struct in_addr dns_addr; |
51 |
static u_int dns_addr_time;
|
52 |
|
53 |
#ifdef _WIN32
|
54 |
|
55 |
int get_dns_addr(struct in_addr *pdns_addr) |
56 |
{ |
57 |
FIXED_INFO *FixedInfo=NULL;
|
58 |
ULONG BufLen; |
59 |
DWORD ret; |
60 |
IP_ADDR_STRING *pIPAddr; |
61 |
struct in_addr tmp_addr;
|
62 |
|
63 |
if (dns_addr.s_addr != 0 && (curtime - dns_addr_time) < 1000) { |
64 |
*pdns_addr = dns_addr; |
65 |
return 0; |
66 |
} |
67 |
|
68 |
FixedInfo = (FIXED_INFO *)GlobalAlloc(GPTR, sizeof(FIXED_INFO));
|
69 |
BufLen = sizeof(FIXED_INFO);
|
70 |
|
71 |
if (ERROR_BUFFER_OVERFLOW == GetNetworkParams(FixedInfo, &BufLen)) {
|
72 |
if (FixedInfo) {
|
73 |
GlobalFree(FixedInfo); |
74 |
FixedInfo = NULL;
|
75 |
} |
76 |
FixedInfo = GlobalAlloc(GPTR, BufLen); |
77 |
} |
78 |
|
79 |
if ((ret = GetNetworkParams(FixedInfo, &BufLen)) != ERROR_SUCCESS) {
|
80 |
printf("GetNetworkParams failed. ret = %08x\n", (u_int)ret );
|
81 |
if (FixedInfo) {
|
82 |
GlobalFree(FixedInfo); |
83 |
FixedInfo = NULL;
|
84 |
} |
85 |
return -1; |
86 |
} |
87 |
|
88 |
pIPAddr = &(FixedInfo->DnsServerList); |
89 |
inet_aton(pIPAddr->IpAddress.String, &tmp_addr); |
90 |
*pdns_addr = tmp_addr; |
91 |
dns_addr = tmp_addr; |
92 |
dns_addr_time = curtime; |
93 |
if (FixedInfo) {
|
94 |
GlobalFree(FixedInfo); |
95 |
FixedInfo = NULL;
|
96 |
} |
97 |
return 0; |
98 |
} |
99 |
|
100 |
static void winsock_cleanup(void) |
101 |
{ |
102 |
WSACleanup(); |
103 |
} |
104 |
|
105 |
#else
|
106 |
|
107 |
static struct stat dns_addr_stat; |
108 |
|
109 |
int get_dns_addr(struct in_addr *pdns_addr) |
110 |
{ |
111 |
char buff[512]; |
112 |
char buff2[257]; |
113 |
FILE *f; |
114 |
int found = 0; |
115 |
struct in_addr tmp_addr;
|
116 |
|
117 |
if (dns_addr.s_addr != 0) { |
118 |
struct stat old_stat;
|
119 |
if ((curtime - dns_addr_time) < 1000) { |
120 |
*pdns_addr = dns_addr; |
121 |
return 0; |
122 |
} |
123 |
old_stat = dns_addr_stat; |
124 |
if (stat("/etc/resolv.conf", &dns_addr_stat) != 0) |
125 |
return -1; |
126 |
if ((dns_addr_stat.st_dev == old_stat.st_dev)
|
127 |
&& (dns_addr_stat.st_ino == old_stat.st_ino) |
128 |
&& (dns_addr_stat.st_size == old_stat.st_size) |
129 |
&& (dns_addr_stat.st_mtime == old_stat.st_mtime)) { |
130 |
*pdns_addr = dns_addr; |
131 |
return 0; |
132 |
} |
133 |
} |
134 |
|
135 |
f = fopen("/etc/resolv.conf", "r"); |
136 |
if (!f)
|
137 |
return -1; |
138 |
|
139 |
#ifdef DEBUG
|
140 |
lprint("IP address of your DNS(s): ");
|
141 |
#endif
|
142 |
while (fgets(buff, 512, f) != NULL) { |
143 |
if (sscanf(buff, "nameserver%*[ \t]%256s", buff2) == 1) { |
144 |
if (!inet_aton(buff2, &tmp_addr))
|
145 |
continue;
|
146 |
/* If it's the first one, set it to dns_addr */
|
147 |
if (!found) {
|
148 |
*pdns_addr = tmp_addr; |
149 |
dns_addr = tmp_addr; |
150 |
dns_addr_time = curtime; |
151 |
} |
152 |
#ifdef DEBUG
|
153 |
else
|
154 |
lprint(", ");
|
155 |
#endif
|
156 |
if (++found > 3) { |
157 |
#ifdef DEBUG
|
158 |
lprint("(more)");
|
159 |
#endif
|
160 |
break;
|
161 |
} |
162 |
#ifdef DEBUG
|
163 |
else
|
164 |
lprint("%s", inet_ntoa(tmp_addr));
|
165 |
#endif
|
166 |
} |
167 |
} |
168 |
fclose(f); |
169 |
if (!found)
|
170 |
return -1; |
171 |
return 0; |
172 |
} |
173 |
|
174 |
#endif
|
175 |
|
176 |
static void slirp_init_once(void) |
177 |
{ |
178 |
static int initialized; |
179 |
#ifdef _WIN32
|
180 |
WSADATA Data; |
181 |
#endif
|
182 |
|
183 |
if (initialized) {
|
184 |
return;
|
185 |
} |
186 |
initialized = 1;
|
187 |
|
188 |
#ifdef _WIN32
|
189 |
WSAStartup(MAKEWORD(2,0), &Data); |
190 |
atexit(winsock_cleanup); |
191 |
#endif
|
192 |
|
193 |
loopback_addr.s_addr = htonl(INADDR_LOOPBACK); |
194 |
} |
195 |
|
196 |
static void slirp_state_save(QEMUFile *f, void *opaque); |
197 |
static int slirp_state_load(QEMUFile *f, void *opaque, int version_id); |
198 |
|
199 |
Slirp *slirp_init(int restricted, struct in_addr vnetwork, |
200 |
struct in_addr vnetmask, struct in_addr vhost, |
201 |
const char *vhostname, const char *tftp_path, |
202 |
const char *bootfile, struct in_addr vdhcp_start, |
203 |
struct in_addr vnameserver, void *opaque) |
204 |
{ |
205 |
Slirp *slirp = qemu_mallocz(sizeof(Slirp));
|
206 |
|
207 |
slirp_init_once(); |
208 |
|
209 |
slirp->restricted = restricted; |
210 |
|
211 |
if_init(slirp); |
212 |
ip_init(slirp); |
213 |
|
214 |
/* Initialise mbufs *after* setting the MTU */
|
215 |
m_init(slirp); |
216 |
|
217 |
slirp->vnetwork_addr = vnetwork; |
218 |
slirp->vnetwork_mask = vnetmask; |
219 |
slirp->vhost_addr = vhost; |
220 |
if (vhostname) {
|
221 |
pstrcpy(slirp->client_hostname, sizeof(slirp->client_hostname),
|
222 |
vhostname); |
223 |
} |
224 |
if (tftp_path) {
|
225 |
slirp->tftp_prefix = qemu_strdup(tftp_path); |
226 |
} |
227 |
if (bootfile) {
|
228 |
slirp->bootp_filename = qemu_strdup(bootfile); |
229 |
} |
230 |
slirp->vdhcp_startaddr = vdhcp_start; |
231 |
slirp->vnameserver_addr = vnameserver; |
232 |
|
233 |
slirp->opaque = opaque; |
234 |
|
235 |
register_savevm(NULL, "slirp", 0, 3, |
236 |
slirp_state_save, slirp_state_load, slirp); |
237 |
|
238 |
QTAILQ_INSERT_TAIL(&slirp_instances, slirp, entry); |
239 |
|
240 |
return slirp;
|
241 |
} |
242 |
|
243 |
void slirp_cleanup(Slirp *slirp)
|
244 |
{ |
245 |
QTAILQ_REMOVE(&slirp_instances, slirp, entry); |
246 |
|
247 |
unregister_savevm(NULL, "slirp", slirp); |
248 |
|
249 |
qemu_free(slirp->tftp_prefix); |
250 |
qemu_free(slirp->bootp_filename); |
251 |
qemu_free(slirp); |
252 |
} |
253 |
|
254 |
#define CONN_CANFSEND(so) (((so)->so_state & (SS_FCANTSENDMORE|SS_ISFCONNECTED)) == SS_ISFCONNECTED)
|
255 |
#define CONN_CANFRCV(so) (((so)->so_state & (SS_FCANTRCVMORE|SS_ISFCONNECTED)) == SS_ISFCONNECTED)
|
256 |
#define UPD_NFDS(x) if (nfds < (x)) nfds = (x) |
257 |
|
258 |
void slirp_select_fill(int *pnfds, |
259 |
fd_set *readfds, fd_set *writefds, fd_set *xfds) |
260 |
{ |
261 |
Slirp *slirp; |
262 |
struct socket *so, *so_next;
|
263 |
int nfds;
|
264 |
|
265 |
if (QTAILQ_EMPTY(&slirp_instances)) {
|
266 |
return;
|
267 |
} |
268 |
|
269 |
/* fail safe */
|
270 |
global_readfds = NULL;
|
271 |
global_writefds = NULL;
|
272 |
global_xfds = NULL;
|
273 |
|
274 |
nfds = *pnfds; |
275 |
/*
|
276 |
* First, TCP sockets
|
277 |
*/
|
278 |
do_slowtimo = 0;
|
279 |
|
280 |
QTAILQ_FOREACH(slirp, &slirp_instances, entry) { |
281 |
/*
|
282 |
* *_slowtimo needs calling if there are IP fragments
|
283 |
* in the fragment queue, or there are TCP connections active
|
284 |
*/
|
285 |
do_slowtimo |= ((slirp->tcb.so_next != &slirp->tcb) || |
286 |
(&slirp->ipq.ip_link != slirp->ipq.ip_link.next)); |
287 |
|
288 |
for (so = slirp->tcb.so_next; so != &slirp->tcb;
|
289 |
so = so_next) { |
290 |
so_next = so->so_next; |
291 |
|
292 |
/*
|
293 |
* See if we need a tcp_fasttimo
|
294 |
*/
|
295 |
if (time_fasttimo == 0 && so->so_tcpcb->t_flags & TF_DELACK) |
296 |
time_fasttimo = curtime; /* Flag when we want a fasttimo */
|
297 |
|
298 |
/*
|
299 |
* NOFDREF can include still connecting to local-host,
|
300 |
* newly socreated() sockets etc. Don't want to select these.
|
301 |
*/
|
302 |
if (so->so_state & SS_NOFDREF || so->s == -1) |
303 |
continue;
|
304 |
|
305 |
/*
|
306 |
* Set for reading sockets which are accepting
|
307 |
*/
|
308 |
if (so->so_state & SS_FACCEPTCONN) {
|
309 |
FD_SET(so->s, readfds); |
310 |
UPD_NFDS(so->s); |
311 |
continue;
|
312 |
} |
313 |
|
314 |
/*
|
315 |
* Set for writing sockets which are connecting
|
316 |
*/
|
317 |
if (so->so_state & SS_ISFCONNECTING) {
|
318 |
FD_SET(so->s, writefds); |
319 |
UPD_NFDS(so->s); |
320 |
continue;
|
321 |
} |
322 |
|
323 |
/*
|
324 |
* Set for writing if we are connected, can send more, and
|
325 |
* we have something to send
|
326 |
*/
|
327 |
if (CONN_CANFSEND(so) && so->so_rcv.sb_cc) {
|
328 |
FD_SET(so->s, writefds); |
329 |
UPD_NFDS(so->s); |
330 |
} |
331 |
|
332 |
/*
|
333 |
* Set for reading (and urgent data) if we are connected, can
|
334 |
* receive more, and we have room for it XXX /2 ?
|
335 |
*/
|
336 |
if (CONN_CANFRCV(so) && (so->so_snd.sb_cc < (so->so_snd.sb_datalen/2))) { |
337 |
FD_SET(so->s, readfds); |
338 |
FD_SET(so->s, xfds); |
339 |
UPD_NFDS(so->s); |
340 |
} |
341 |
} |
342 |
|
343 |
/*
|
344 |
* UDP sockets
|
345 |
*/
|
346 |
for (so = slirp->udb.so_next; so != &slirp->udb;
|
347 |
so = so_next) { |
348 |
so_next = so->so_next; |
349 |
|
350 |
/*
|
351 |
* See if it's timed out
|
352 |
*/
|
353 |
if (so->so_expire) {
|
354 |
if (so->so_expire <= curtime) {
|
355 |
udp_detach(so); |
356 |
continue;
|
357 |
} else
|
358 |
do_slowtimo = 1; /* Let socket expire */ |
359 |
} |
360 |
|
361 |
/*
|
362 |
* When UDP packets are received from over the
|
363 |
* link, they're sendto()'d straight away, so
|
364 |
* no need for setting for writing
|
365 |
* Limit the number of packets queued by this session
|
366 |
* to 4. Note that even though we try and limit this
|
367 |
* to 4 packets, the session could have more queued
|
368 |
* if the packets needed to be fragmented
|
369 |
* (XXX <= 4 ?)
|
370 |
*/
|
371 |
if ((so->so_state & SS_ISFCONNECTED) && so->so_queued <= 4) { |
372 |
FD_SET(so->s, readfds); |
373 |
UPD_NFDS(so->s); |
374 |
} |
375 |
} |
376 |
} |
377 |
|
378 |
*pnfds = nfds; |
379 |
} |
380 |
|
381 |
void slirp_select_poll(fd_set *readfds, fd_set *writefds, fd_set *xfds,
|
382 |
int select_error)
|
383 |
{ |
384 |
Slirp *slirp; |
385 |
struct socket *so, *so_next;
|
386 |
int ret;
|
387 |
|
388 |
if (QTAILQ_EMPTY(&slirp_instances)) {
|
389 |
return;
|
390 |
} |
391 |
|
392 |
global_readfds = readfds; |
393 |
global_writefds = writefds; |
394 |
global_xfds = xfds; |
395 |
|
396 |
curtime = qemu_get_clock(rt_clock); |
397 |
|
398 |
QTAILQ_FOREACH(slirp, &slirp_instances, entry) { |
399 |
/*
|
400 |
* See if anything has timed out
|
401 |
*/
|
402 |
if (time_fasttimo && ((curtime - time_fasttimo) >= 2)) { |
403 |
tcp_fasttimo(slirp); |
404 |
time_fasttimo = 0;
|
405 |
} |
406 |
if (do_slowtimo && ((curtime - last_slowtimo) >= 499)) { |
407 |
ip_slowtimo(slirp); |
408 |
tcp_slowtimo(slirp); |
409 |
last_slowtimo = curtime; |
410 |
} |
411 |
|
412 |
/*
|
413 |
* Check sockets
|
414 |
*/
|
415 |
if (!select_error) {
|
416 |
/*
|
417 |
* Check TCP sockets
|
418 |
*/
|
419 |
for (so = slirp->tcb.so_next; so != &slirp->tcb;
|
420 |
so = so_next) { |
421 |
so_next = so->so_next; |
422 |
|
423 |
/*
|
424 |
* FD_ISSET is meaningless on these sockets
|
425 |
* (and they can crash the program)
|
426 |
*/
|
427 |
if (so->so_state & SS_NOFDREF || so->s == -1) |
428 |
continue;
|
429 |
|
430 |
/*
|
431 |
* Check for URG data
|
432 |
* This will soread as well, so no need to
|
433 |
* test for readfds below if this succeeds
|
434 |
*/
|
435 |
if (FD_ISSET(so->s, xfds))
|
436 |
sorecvoob(so); |
437 |
/*
|
438 |
* Check sockets for reading
|
439 |
*/
|
440 |
else if (FD_ISSET(so->s, readfds)) { |
441 |
/*
|
442 |
* Check for incoming connections
|
443 |
*/
|
444 |
if (so->so_state & SS_FACCEPTCONN) {
|
445 |
tcp_connect(so); |
446 |
continue;
|
447 |
} /* else */
|
448 |
ret = soread(so); |
449 |
|
450 |
/* Output it if we read something */
|
451 |
if (ret > 0) |
452 |
tcp_output(sototcpcb(so)); |
453 |
} |
454 |
|
455 |
/*
|
456 |
* Check sockets for writing
|
457 |
*/
|
458 |
if (FD_ISSET(so->s, writefds)) {
|
459 |
/*
|
460 |
* Check for non-blocking, still-connecting sockets
|
461 |
*/
|
462 |
if (so->so_state & SS_ISFCONNECTING) {
|
463 |
/* Connected */
|
464 |
so->so_state &= ~SS_ISFCONNECTING; |
465 |
|
466 |
ret = send(so->s, (const void *) &ret, 0, 0); |
467 |
if (ret < 0) { |
468 |
/* XXXXX Must fix, zero bytes is a NOP */
|
469 |
if (errno == EAGAIN || errno == EWOULDBLOCK ||
|
470 |
errno == EINPROGRESS || errno == ENOTCONN) |
471 |
continue;
|
472 |
|
473 |
/* else failed */
|
474 |
so->so_state &= SS_PERSISTENT_MASK; |
475 |
so->so_state |= SS_NOFDREF; |
476 |
} |
477 |
/* else so->so_state &= ~SS_ISFCONNECTING; */
|
478 |
|
479 |
/*
|
480 |
* Continue tcp_input
|
481 |
*/
|
482 |
tcp_input((struct mbuf *)NULL, sizeof(struct ip), so); |
483 |
/* continue; */
|
484 |
} else
|
485 |
ret = sowrite(so); |
486 |
/*
|
487 |
* XXXXX If we wrote something (a lot), there
|
488 |
* could be a need for a window update.
|
489 |
* In the worst case, the remote will send
|
490 |
* a window probe to get things going again
|
491 |
*/
|
492 |
} |
493 |
|
494 |
/*
|
495 |
* Probe a still-connecting, non-blocking socket
|
496 |
* to check if it's still alive
|
497 |
*/
|
498 |
#ifdef PROBE_CONN
|
499 |
if (so->so_state & SS_ISFCONNECTING) {
|
500 |
ret = recv(so->s, (char *)&ret, 0,0); |
501 |
|
502 |
if (ret < 0) { |
503 |
/* XXX */
|
504 |
if (errno == EAGAIN || errno == EWOULDBLOCK ||
|
505 |
errno == EINPROGRESS || errno == ENOTCONN) |
506 |
continue; /* Still connecting, continue */ |
507 |
|
508 |
/* else failed */
|
509 |
so->so_state &= SS_PERSISTENT_MASK; |
510 |
so->so_state |= SS_NOFDREF; |
511 |
|
512 |
/* tcp_input will take care of it */
|
513 |
} else {
|
514 |
ret = send(so->s, &ret, 0,0); |
515 |
if (ret < 0) { |
516 |
/* XXX */
|
517 |
if (errno == EAGAIN || errno == EWOULDBLOCK ||
|
518 |
errno == EINPROGRESS || errno == ENOTCONN) |
519 |
continue;
|
520 |
/* else failed */
|
521 |
so->so_state &= SS_PERSISTENT_MASK; |
522 |
so->so_state |= SS_NOFDREF; |
523 |
} else
|
524 |
so->so_state &= ~SS_ISFCONNECTING; |
525 |
|
526 |
} |
527 |
tcp_input((struct mbuf *)NULL, sizeof(struct ip),so); |
528 |
} /* SS_ISFCONNECTING */
|
529 |
#endif
|
530 |
} |
531 |
|
532 |
/*
|
533 |
* Now UDP sockets.
|
534 |
* Incoming packets are sent straight away, they're not buffered.
|
535 |
* Incoming UDP data isn't buffered either.
|
536 |
*/
|
537 |
for (so = slirp->udb.so_next; so != &slirp->udb;
|
538 |
so = so_next) { |
539 |
so_next = so->so_next; |
540 |
|
541 |
if (so->s != -1 && FD_ISSET(so->s, readfds)) { |
542 |
sorecvfrom(so); |
543 |
} |
544 |
} |
545 |
} |
546 |
|
547 |
/*
|
548 |
* See if we can start outputting
|
549 |
*/
|
550 |
if (slirp->if_queued) {
|
551 |
if_start(slirp); |
552 |
} |
553 |
} |
554 |
|
555 |
/* clear global file descriptor sets.
|
556 |
* these reside on the stack in vl.c
|
557 |
* so they're unusable if we're not in
|
558 |
* slirp_select_fill or slirp_select_poll.
|
559 |
*/
|
560 |
global_readfds = NULL;
|
561 |
global_writefds = NULL;
|
562 |
global_xfds = NULL;
|
563 |
} |
564 |
|
565 |
#define ETH_ALEN 6 |
566 |
#define ETH_HLEN 14 |
567 |
|
568 |
#define ETH_P_IP 0x0800 /* Internet Protocol packet */ |
569 |
#define ETH_P_ARP 0x0806 /* Address Resolution packet */ |
570 |
|
571 |
#define ARPOP_REQUEST 1 /* ARP request */ |
572 |
#define ARPOP_REPLY 2 /* ARP reply */ |
573 |
|
574 |
struct ethhdr
|
575 |
{ |
576 |
unsigned char h_dest[ETH_ALEN]; /* destination eth addr */ |
577 |
unsigned char h_source[ETH_ALEN]; /* source ether addr */ |
578 |
unsigned short h_proto; /* packet type ID field */ |
579 |
}; |
580 |
|
581 |
struct arphdr
|
582 |
{ |
583 |
unsigned short ar_hrd; /* format of hardware address */ |
584 |
unsigned short ar_pro; /* format of protocol address */ |
585 |
unsigned char ar_hln; /* length of hardware address */ |
586 |
unsigned char ar_pln; /* length of protocol address */ |
587 |
unsigned short ar_op; /* ARP opcode (command) */ |
588 |
|
589 |
/*
|
590 |
* Ethernet looks like this : This bit is variable sized however...
|
591 |
*/
|
592 |
unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */ |
593 |
uint32_t ar_sip; /* sender IP address */
|
594 |
unsigned char ar_tha[ETH_ALEN]; /* target hardware address */ |
595 |
uint32_t ar_tip ; /* target IP address */
|
596 |
} __attribute__((packed)); |
597 |
|
598 |
static void arp_input(Slirp *slirp, const uint8_t *pkt, int pkt_len) |
599 |
{ |
600 |
struct ethhdr *eh = (struct ethhdr *)pkt; |
601 |
struct arphdr *ah = (struct arphdr *)(pkt + ETH_HLEN); |
602 |
uint8_t arp_reply[max(ETH_HLEN + sizeof(struct arphdr), 64)]; |
603 |
struct ethhdr *reh = (struct ethhdr *)arp_reply; |
604 |
struct arphdr *rah = (struct arphdr *)(arp_reply + ETH_HLEN); |
605 |
int ar_op;
|
606 |
struct ex_list *ex_ptr;
|
607 |
|
608 |
ar_op = ntohs(ah->ar_op); |
609 |
switch(ar_op) {
|
610 |
case ARPOP_REQUEST:
|
611 |
if ((ah->ar_tip & slirp->vnetwork_mask.s_addr) ==
|
612 |
slirp->vnetwork_addr.s_addr) { |
613 |
if (ah->ar_tip == slirp->vnameserver_addr.s_addr ||
|
614 |
ah->ar_tip == slirp->vhost_addr.s_addr) |
615 |
goto arp_ok;
|
616 |
for (ex_ptr = slirp->exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next) {
|
617 |
if (ex_ptr->ex_addr.s_addr == ah->ar_tip)
|
618 |
goto arp_ok;
|
619 |
} |
620 |
return;
|
621 |
arp_ok:
|
622 |
memset(arp_reply, 0, sizeof(arp_reply)); |
623 |
/* XXX: make an ARP request to have the client address */
|
624 |
memcpy(slirp->client_ethaddr, eh->h_source, ETH_ALEN); |
625 |
|
626 |
/* ARP request for alias/dns mac address */
|
627 |
memcpy(reh->h_dest, pkt + ETH_ALEN, ETH_ALEN); |
628 |
memcpy(reh->h_source, special_ethaddr, ETH_ALEN - 4);
|
629 |
memcpy(&reh->h_source[2], &ah->ar_tip, 4); |
630 |
reh->h_proto = htons(ETH_P_ARP); |
631 |
|
632 |
rah->ar_hrd = htons(1);
|
633 |
rah->ar_pro = htons(ETH_P_IP); |
634 |
rah->ar_hln = ETH_ALEN; |
635 |
rah->ar_pln = 4;
|
636 |
rah->ar_op = htons(ARPOP_REPLY); |
637 |
memcpy(rah->ar_sha, reh->h_source, ETH_ALEN); |
638 |
rah->ar_sip = ah->ar_tip; |
639 |
memcpy(rah->ar_tha, ah->ar_sha, ETH_ALEN); |
640 |
rah->ar_tip = ah->ar_sip; |
641 |
slirp_output(slirp->opaque, arp_reply, sizeof(arp_reply));
|
642 |
} |
643 |
break;
|
644 |
case ARPOP_REPLY:
|
645 |
/* reply to request of client mac address ? */
|
646 |
if (!memcmp(slirp->client_ethaddr, zero_ethaddr, ETH_ALEN) &&
|
647 |
ah->ar_sip == slirp->client_ipaddr.s_addr) { |
648 |
memcpy(slirp->client_ethaddr, ah->ar_sha, ETH_ALEN); |
649 |
} |
650 |
break;
|
651 |
default:
|
652 |
break;
|
653 |
} |
654 |
} |
655 |
|
656 |
void slirp_input(Slirp *slirp, const uint8_t *pkt, int pkt_len) |
657 |
{ |
658 |
struct mbuf *m;
|
659 |
int proto;
|
660 |
|
661 |
if (pkt_len < ETH_HLEN)
|
662 |
return;
|
663 |
|
664 |
proto = ntohs(*(uint16_t *)(pkt + 12));
|
665 |
switch(proto) {
|
666 |
case ETH_P_ARP:
|
667 |
arp_input(slirp, pkt, pkt_len); |
668 |
break;
|
669 |
case ETH_P_IP:
|
670 |
m = m_get(slirp); |
671 |
if (!m)
|
672 |
return;
|
673 |
/* Note: we add to align the IP header */
|
674 |
if (M_FREEROOM(m) < pkt_len + 2) { |
675 |
m_inc(m, pkt_len + 2);
|
676 |
} |
677 |
m->m_len = pkt_len + 2;
|
678 |
memcpy(m->m_data + 2, pkt, pkt_len);
|
679 |
|
680 |
m->m_data += 2 + ETH_HLEN;
|
681 |
m->m_len -= 2 + ETH_HLEN;
|
682 |
|
683 |
ip_input(m); |
684 |
break;
|
685 |
default:
|
686 |
break;
|
687 |
} |
688 |
} |
689 |
|
690 |
/* output the IP packet to the ethernet device */
|
691 |
void if_encap(Slirp *slirp, const uint8_t *ip_data, int ip_data_len) |
692 |
{ |
693 |
uint8_t buf[1600];
|
694 |
struct ethhdr *eh = (struct ethhdr *)buf; |
695 |
|
696 |
if (ip_data_len + ETH_HLEN > sizeof(buf)) |
697 |
return;
|
698 |
|
699 |
if (!memcmp(slirp->client_ethaddr, zero_ethaddr, ETH_ALEN)) {
|
700 |
uint8_t arp_req[ETH_HLEN + sizeof(struct arphdr)]; |
701 |
struct ethhdr *reh = (struct ethhdr *)arp_req; |
702 |
struct arphdr *rah = (struct arphdr *)(arp_req + ETH_HLEN); |
703 |
const struct ip *iph = (const struct ip *)ip_data; |
704 |
|
705 |
/* If the client addr is not known, there is no point in
|
706 |
sending the packet to it. Normally the sender should have
|
707 |
done an ARP request to get its MAC address. Here we do it
|
708 |
in place of sending the packet and we hope that the sender
|
709 |
will retry sending its packet. */
|
710 |
memset(reh->h_dest, 0xff, ETH_ALEN);
|
711 |
memcpy(reh->h_source, special_ethaddr, ETH_ALEN - 4);
|
712 |
memcpy(&reh->h_source[2], &slirp->vhost_addr, 4); |
713 |
reh->h_proto = htons(ETH_P_ARP); |
714 |
rah->ar_hrd = htons(1);
|
715 |
rah->ar_pro = htons(ETH_P_IP); |
716 |
rah->ar_hln = ETH_ALEN; |
717 |
rah->ar_pln = 4;
|
718 |
rah->ar_op = htons(ARPOP_REQUEST); |
719 |
/* source hw addr */
|
720 |
memcpy(rah->ar_sha, special_ethaddr, ETH_ALEN - 4);
|
721 |
memcpy(&rah->ar_sha[2], &slirp->vhost_addr, 4); |
722 |
/* source IP */
|
723 |
rah->ar_sip = slirp->vhost_addr.s_addr; |
724 |
/* target hw addr (none) */
|
725 |
memset(rah->ar_tha, 0, ETH_ALEN);
|
726 |
/* target IP */
|
727 |
rah->ar_tip = iph->ip_dst.s_addr; |
728 |
slirp->client_ipaddr = iph->ip_dst; |
729 |
slirp_output(slirp->opaque, arp_req, sizeof(arp_req));
|
730 |
} else {
|
731 |
memcpy(eh->h_dest, slirp->client_ethaddr, ETH_ALEN); |
732 |
memcpy(eh->h_source, special_ethaddr, ETH_ALEN - 4);
|
733 |
/* XXX: not correct */
|
734 |
memcpy(&eh->h_source[2], &slirp->vhost_addr, 4); |
735 |
eh->h_proto = htons(ETH_P_IP); |
736 |
memcpy(buf + sizeof(struct ethhdr), ip_data, ip_data_len); |
737 |
slirp_output(slirp->opaque, buf, ip_data_len + ETH_HLEN); |
738 |
} |
739 |
} |
740 |
|
741 |
/* Drop host forwarding rule, return 0 if found. */
|
742 |
int slirp_remove_hostfwd(Slirp *slirp, int is_udp, struct in_addr host_addr, |
743 |
int host_port)
|
744 |
{ |
745 |
struct socket *so;
|
746 |
struct socket *head = (is_udp ? &slirp->udb : &slirp->tcb);
|
747 |
struct sockaddr_in addr;
|
748 |
int port = htons(host_port);
|
749 |
socklen_t addr_len; |
750 |
|
751 |
for (so = head->so_next; so != head; so = so->so_next) {
|
752 |
addr_len = sizeof(addr);
|
753 |
if ((so->so_state & SS_HOSTFWD) &&
|
754 |
getsockname(so->s, (struct sockaddr *)&addr, &addr_len) == 0 && |
755 |
addr.sin_addr.s_addr == host_addr.s_addr && |
756 |
addr.sin_port == port) { |
757 |
close(so->s); |
758 |
sofree(so); |
759 |
return 0; |
760 |
} |
761 |
} |
762 |
|
763 |
return -1; |
764 |
} |
765 |
|
766 |
int slirp_add_hostfwd(Slirp *slirp, int is_udp, struct in_addr host_addr, |
767 |
int host_port, struct in_addr guest_addr, int guest_port) |
768 |
{ |
769 |
if (!guest_addr.s_addr) {
|
770 |
guest_addr = slirp->vdhcp_startaddr; |
771 |
} |
772 |
if (is_udp) {
|
773 |
if (!udp_listen(slirp, host_addr.s_addr, htons(host_port),
|
774 |
guest_addr.s_addr, htons(guest_port), SS_HOSTFWD)) |
775 |
return -1; |
776 |
} else {
|
777 |
if (!tcp_listen(slirp, host_addr.s_addr, htons(host_port),
|
778 |
guest_addr.s_addr, htons(guest_port), SS_HOSTFWD)) |
779 |
return -1; |
780 |
} |
781 |
return 0; |
782 |
} |
783 |
|
784 |
int slirp_add_exec(Slirp *slirp, int do_pty, const void *args, |
785 |
struct in_addr *guest_addr, int guest_port) |
786 |
{ |
787 |
if (!guest_addr->s_addr) {
|
788 |
guest_addr->s_addr = slirp->vnetwork_addr.s_addr | |
789 |
(htonl(0x0204) & ~slirp->vnetwork_mask.s_addr);
|
790 |
} |
791 |
if ((guest_addr->s_addr & slirp->vnetwork_mask.s_addr) !=
|
792 |
slirp->vnetwork_addr.s_addr || |
793 |
guest_addr->s_addr == slirp->vhost_addr.s_addr || |
794 |
guest_addr->s_addr == slirp->vnameserver_addr.s_addr) { |
795 |
return -1; |
796 |
} |
797 |
return add_exec(&slirp->exec_list, do_pty, (char *)args, *guest_addr, |
798 |
htons(guest_port)); |
799 |
} |
800 |
|
801 |
ssize_t slirp_send(struct socket *so, const void *buf, size_t len, int flags) |
802 |
{ |
803 |
if (so->s == -1 && so->extra) { |
804 |
qemu_chr_write(so->extra, buf, len); |
805 |
return len;
|
806 |
} |
807 |
|
808 |
return send(so->s, buf, len, flags);
|
809 |
} |
810 |
|
811 |
static struct socket * |
812 |
slirp_find_ctl_socket(Slirp *slirp, struct in_addr guest_addr, int guest_port) |
813 |
{ |
814 |
struct socket *so;
|
815 |
|
816 |
for (so = slirp->tcb.so_next; so != &slirp->tcb; so = so->so_next) {
|
817 |
if (so->so_faddr.s_addr == guest_addr.s_addr &&
|
818 |
htons(so->so_fport) == guest_port) { |
819 |
return so;
|
820 |
} |
821 |
} |
822 |
return NULL; |
823 |
} |
824 |
|
825 |
size_t slirp_socket_can_recv(Slirp *slirp, struct in_addr guest_addr,
|
826 |
int guest_port)
|
827 |
{ |
828 |
struct iovec iov[2]; |
829 |
struct socket *so;
|
830 |
|
831 |
so = slirp_find_ctl_socket(slirp, guest_addr, guest_port); |
832 |
|
833 |
if (!so || so->so_state & SS_NOFDREF)
|
834 |
return 0; |
835 |
|
836 |
if (!CONN_CANFRCV(so) || so->so_snd.sb_cc >= (so->so_snd.sb_datalen/2)) |
837 |
return 0; |
838 |
|
839 |
return sopreprbuf(so, iov, NULL); |
840 |
} |
841 |
|
842 |
void slirp_socket_recv(Slirp *slirp, struct in_addr guest_addr, int guest_port, |
843 |
const uint8_t *buf, int size) |
844 |
{ |
845 |
int ret;
|
846 |
struct socket *so = slirp_find_ctl_socket(slirp, guest_addr, guest_port);
|
847 |
|
848 |
if (!so)
|
849 |
return;
|
850 |
|
851 |
ret = soreadbuf(so, (const char *)buf, size); |
852 |
|
853 |
if (ret > 0) |
854 |
tcp_output(sototcpcb(so)); |
855 |
} |
856 |
|
857 |
static void slirp_tcp_save(QEMUFile *f, struct tcpcb *tp) |
858 |
{ |
859 |
int i;
|
860 |
|
861 |
qemu_put_sbe16(f, tp->t_state); |
862 |
for (i = 0; i < TCPT_NTIMERS; i++) |
863 |
qemu_put_sbe16(f, tp->t_timer[i]); |
864 |
qemu_put_sbe16(f, tp->t_rxtshift); |
865 |
qemu_put_sbe16(f, tp->t_rxtcur); |
866 |
qemu_put_sbe16(f, tp->t_dupacks); |
867 |
qemu_put_be16(f, tp->t_maxseg); |
868 |
qemu_put_sbyte(f, tp->t_force); |
869 |
qemu_put_be16(f, tp->t_flags); |
870 |
qemu_put_be32(f, tp->snd_una); |
871 |
qemu_put_be32(f, tp->snd_nxt); |
872 |
qemu_put_be32(f, tp->snd_up); |
873 |
qemu_put_be32(f, tp->snd_wl1); |
874 |
qemu_put_be32(f, tp->snd_wl2); |
875 |
qemu_put_be32(f, tp->iss); |
876 |
qemu_put_be32(f, tp->snd_wnd); |
877 |
qemu_put_be32(f, tp->rcv_wnd); |
878 |
qemu_put_be32(f, tp->rcv_nxt); |
879 |
qemu_put_be32(f, tp->rcv_up); |
880 |
qemu_put_be32(f, tp->irs); |
881 |
qemu_put_be32(f, tp->rcv_adv); |
882 |
qemu_put_be32(f, tp->snd_max); |
883 |
qemu_put_be32(f, tp->snd_cwnd); |
884 |
qemu_put_be32(f, tp->snd_ssthresh); |
885 |
qemu_put_sbe16(f, tp->t_idle); |
886 |
qemu_put_sbe16(f, tp->t_rtt); |
887 |
qemu_put_be32(f, tp->t_rtseq); |
888 |
qemu_put_sbe16(f, tp->t_srtt); |
889 |
qemu_put_sbe16(f, tp->t_rttvar); |
890 |
qemu_put_be16(f, tp->t_rttmin); |
891 |
qemu_put_be32(f, tp->max_sndwnd); |
892 |
qemu_put_byte(f, tp->t_oobflags); |
893 |
qemu_put_byte(f, tp->t_iobc); |
894 |
qemu_put_sbe16(f, tp->t_softerror); |
895 |
qemu_put_byte(f, tp->snd_scale); |
896 |
qemu_put_byte(f, tp->rcv_scale); |
897 |
qemu_put_byte(f, tp->request_r_scale); |
898 |
qemu_put_byte(f, tp->requested_s_scale); |
899 |
qemu_put_be32(f, tp->ts_recent); |
900 |
qemu_put_be32(f, tp->ts_recent_age); |
901 |
qemu_put_be32(f, tp->last_ack_sent); |
902 |
} |
903 |
|
904 |
static void slirp_sbuf_save(QEMUFile *f, struct sbuf *sbuf) |
905 |
{ |
906 |
uint32_t off; |
907 |
|
908 |
qemu_put_be32(f, sbuf->sb_cc); |
909 |
qemu_put_be32(f, sbuf->sb_datalen); |
910 |
off = (uint32_t)(sbuf->sb_wptr - sbuf->sb_data); |
911 |
qemu_put_sbe32(f, off); |
912 |
off = (uint32_t)(sbuf->sb_rptr - sbuf->sb_data); |
913 |
qemu_put_sbe32(f, off); |
914 |
qemu_put_buffer(f, (unsigned char*)sbuf->sb_data, sbuf->sb_datalen); |
915 |
} |
916 |
|
917 |
static void slirp_socket_save(QEMUFile *f, struct socket *so) |
918 |
{ |
919 |
qemu_put_be32(f, so->so_urgc); |
920 |
qemu_put_be32(f, so->so_faddr.s_addr); |
921 |
qemu_put_be32(f, so->so_laddr.s_addr); |
922 |
qemu_put_be16(f, so->so_fport); |
923 |
qemu_put_be16(f, so->so_lport); |
924 |
qemu_put_byte(f, so->so_iptos); |
925 |
qemu_put_byte(f, so->so_emu); |
926 |
qemu_put_byte(f, so->so_type); |
927 |
qemu_put_be32(f, so->so_state); |
928 |
slirp_sbuf_save(f, &so->so_rcv); |
929 |
slirp_sbuf_save(f, &so->so_snd); |
930 |
slirp_tcp_save(f, so->so_tcpcb); |
931 |
} |
932 |
|
933 |
static void slirp_bootp_save(QEMUFile *f, Slirp *slirp) |
934 |
{ |
935 |
int i;
|
936 |
|
937 |
for (i = 0; i < NB_BOOTP_CLIENTS; i++) { |
938 |
qemu_put_be16(f, slirp->bootp_clients[i].allocated); |
939 |
qemu_put_buffer(f, slirp->bootp_clients[i].macaddr, 6);
|
940 |
} |
941 |
} |
942 |
|
943 |
static void slirp_state_save(QEMUFile *f, void *opaque) |
944 |
{ |
945 |
Slirp *slirp = opaque; |
946 |
struct ex_list *ex_ptr;
|
947 |
|
948 |
for (ex_ptr = slirp->exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next)
|
949 |
if (ex_ptr->ex_pty == 3) { |
950 |
struct socket *so;
|
951 |
so = slirp_find_ctl_socket(slirp, ex_ptr->ex_addr, |
952 |
ntohs(ex_ptr->ex_fport)); |
953 |
if (!so)
|
954 |
continue;
|
955 |
|
956 |
qemu_put_byte(f, 42);
|
957 |
slirp_socket_save(f, so); |
958 |
} |
959 |
qemu_put_byte(f, 0);
|
960 |
|
961 |
qemu_put_be16(f, slirp->ip_id); |
962 |
|
963 |
slirp_bootp_save(f, slirp); |
964 |
} |
965 |
|
966 |
static void slirp_tcp_load(QEMUFile *f, struct tcpcb *tp) |
967 |
{ |
968 |
int i;
|
969 |
|
970 |
tp->t_state = qemu_get_sbe16(f); |
971 |
for (i = 0; i < TCPT_NTIMERS; i++) |
972 |
tp->t_timer[i] = qemu_get_sbe16(f); |
973 |
tp->t_rxtshift = qemu_get_sbe16(f); |
974 |
tp->t_rxtcur = qemu_get_sbe16(f); |
975 |
tp->t_dupacks = qemu_get_sbe16(f); |
976 |
tp->t_maxseg = qemu_get_be16(f); |
977 |
tp->t_force = qemu_get_sbyte(f); |
978 |
tp->t_flags = qemu_get_be16(f); |
979 |
tp->snd_una = qemu_get_be32(f); |
980 |
tp->snd_nxt = qemu_get_be32(f); |
981 |
tp->snd_up = qemu_get_be32(f); |
982 |
tp->snd_wl1 = qemu_get_be32(f); |
983 |
tp->snd_wl2 = qemu_get_be32(f); |
984 |
tp->iss = qemu_get_be32(f); |
985 |
tp->snd_wnd = qemu_get_be32(f); |
986 |
tp->rcv_wnd = qemu_get_be32(f); |
987 |
tp->rcv_nxt = qemu_get_be32(f); |
988 |
tp->rcv_up = qemu_get_be32(f); |
989 |
tp->irs = qemu_get_be32(f); |
990 |
tp->rcv_adv = qemu_get_be32(f); |
991 |
tp->snd_max = qemu_get_be32(f); |
992 |
tp->snd_cwnd = qemu_get_be32(f); |
993 |
tp->snd_ssthresh = qemu_get_be32(f); |
994 |
tp->t_idle = qemu_get_sbe16(f); |
995 |
tp->t_rtt = qemu_get_sbe16(f); |
996 |
tp->t_rtseq = qemu_get_be32(f); |
997 |
tp->t_srtt = qemu_get_sbe16(f); |
998 |
tp->t_rttvar = qemu_get_sbe16(f); |
999 |
tp->t_rttmin = qemu_get_be16(f); |
1000 |
tp->max_sndwnd = qemu_get_be32(f); |
1001 |
tp->t_oobflags = qemu_get_byte(f); |
1002 |
tp->t_iobc = qemu_get_byte(f); |
1003 |
tp->t_softerror = qemu_get_sbe16(f); |
1004 |
tp->snd_scale = qemu_get_byte(f); |
1005 |
tp->rcv_scale = qemu_get_byte(f); |
1006 |
tp->request_r_scale = qemu_get_byte(f); |
1007 |
tp->requested_s_scale = qemu_get_byte(f); |
1008 |
tp->ts_recent = qemu_get_be32(f); |
1009 |
tp->ts_recent_age = qemu_get_be32(f); |
1010 |
tp->last_ack_sent = qemu_get_be32(f); |
1011 |
tcp_template(tp); |
1012 |
} |
1013 |
|
1014 |
static int slirp_sbuf_load(QEMUFile *f, struct sbuf *sbuf) |
1015 |
{ |
1016 |
uint32_t off, sb_cc, sb_datalen; |
1017 |
|
1018 |
sb_cc = qemu_get_be32(f); |
1019 |
sb_datalen = qemu_get_be32(f); |
1020 |
|
1021 |
sbreserve(sbuf, sb_datalen); |
1022 |
|
1023 |
if (sbuf->sb_datalen != sb_datalen)
|
1024 |
return -ENOMEM;
|
1025 |
|
1026 |
sbuf->sb_cc = sb_cc; |
1027 |
|
1028 |
off = qemu_get_sbe32(f); |
1029 |
sbuf->sb_wptr = sbuf->sb_data + off; |
1030 |
off = qemu_get_sbe32(f); |
1031 |
sbuf->sb_rptr = sbuf->sb_data + off; |
1032 |
qemu_get_buffer(f, (unsigned char*)sbuf->sb_data, sbuf->sb_datalen); |
1033 |
|
1034 |
return 0; |
1035 |
} |
1036 |
|
1037 |
static int slirp_socket_load(QEMUFile *f, struct socket *so) |
1038 |
{ |
1039 |
if (tcp_attach(so) < 0) |
1040 |
return -ENOMEM;
|
1041 |
|
1042 |
so->so_urgc = qemu_get_be32(f); |
1043 |
so->so_faddr.s_addr = qemu_get_be32(f); |
1044 |
so->so_laddr.s_addr = qemu_get_be32(f); |
1045 |
so->so_fport = qemu_get_be16(f); |
1046 |
so->so_lport = qemu_get_be16(f); |
1047 |
so->so_iptos = qemu_get_byte(f); |
1048 |
so->so_emu = qemu_get_byte(f); |
1049 |
so->so_type = qemu_get_byte(f); |
1050 |
so->so_state = qemu_get_be32(f); |
1051 |
if (slirp_sbuf_load(f, &so->so_rcv) < 0) |
1052 |
return -ENOMEM;
|
1053 |
if (slirp_sbuf_load(f, &so->so_snd) < 0) |
1054 |
return -ENOMEM;
|
1055 |
slirp_tcp_load(f, so->so_tcpcb); |
1056 |
|
1057 |
return 0; |
1058 |
} |
1059 |
|
1060 |
static void slirp_bootp_load(QEMUFile *f, Slirp *slirp) |
1061 |
{ |
1062 |
int i;
|
1063 |
|
1064 |
for (i = 0; i < NB_BOOTP_CLIENTS; i++) { |
1065 |
slirp->bootp_clients[i].allocated = qemu_get_be16(f); |
1066 |
qemu_get_buffer(f, slirp->bootp_clients[i].macaddr, 6);
|
1067 |
} |
1068 |
} |
1069 |
|
1070 |
static int slirp_state_load(QEMUFile *f, void *opaque, int version_id) |
1071 |
{ |
1072 |
Slirp *slirp = opaque; |
1073 |
struct ex_list *ex_ptr;
|
1074 |
|
1075 |
while (qemu_get_byte(f)) {
|
1076 |
int ret;
|
1077 |
struct socket *so = socreate(slirp);
|
1078 |
|
1079 |
if (!so)
|
1080 |
return -ENOMEM;
|
1081 |
|
1082 |
ret = slirp_socket_load(f, so); |
1083 |
|
1084 |
if (ret < 0) |
1085 |
return ret;
|
1086 |
|
1087 |
if ((so->so_faddr.s_addr & slirp->vnetwork_mask.s_addr) !=
|
1088 |
slirp->vnetwork_addr.s_addr) { |
1089 |
return -EINVAL;
|
1090 |
} |
1091 |
for (ex_ptr = slirp->exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next) {
|
1092 |
if (ex_ptr->ex_pty == 3 && |
1093 |
so->so_faddr.s_addr == ex_ptr->ex_addr.s_addr && |
1094 |
so->so_fport == ex_ptr->ex_fport) { |
1095 |
break;
|
1096 |
} |
1097 |
} |
1098 |
if (!ex_ptr)
|
1099 |
return -EINVAL;
|
1100 |
|
1101 |
so->extra = (void *)ex_ptr->ex_exec;
|
1102 |
} |
1103 |
|
1104 |
if (version_id >= 2) { |
1105 |
slirp->ip_id = qemu_get_be16(f); |
1106 |
} |
1107 |
|
1108 |
if (version_id >= 3) { |
1109 |
slirp_bootp_load(f, slirp); |
1110 |
} |
1111 |
|
1112 |
return 0; |
1113 |
} |