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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[ETH_ALEN] = { | |
35 | 0x52, 0x55, 0x00, 0x00, 0x00, 0x00 | |
36 | }; | |
37 | ||
38 | static const uint8_t zero_ethaddr[ETH_ALEN] = { 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 = g_malloc0(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 = g_strdup(tftp_path); | |
226 | } | |
227 | if (bootfile) { | |
228 | slirp->bootp_filename = g_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 | ip_cleanup(slirp); | |
250 | m_cleanup(slirp); | |
251 | ||
252 | g_free(slirp->tftp_prefix); | |
253 | g_free(slirp->bootp_filename); | |
254 | g_free(slirp); | |
255 | } | |
256 | ||
257 | #define CONN_CANFSEND(so) (((so)->so_state & (SS_FCANTSENDMORE|SS_ISFCONNECTED)) == SS_ISFCONNECTED) | |
258 | #define CONN_CANFRCV(so) (((so)->so_state & (SS_FCANTRCVMORE|SS_ISFCONNECTED)) == SS_ISFCONNECTED) | |
259 | #define UPD_NFDS(x) if (nfds < (x)) nfds = (x) | |
260 | ||
261 | void slirp_update_timeout(uint32_t *timeout) | |
262 | { | |
263 | if (!QTAILQ_EMPTY(&slirp_instances)) { | |
264 | *timeout = MIN(1000, *timeout); | |
265 | } | |
266 | } | |
267 | ||
268 | void slirp_select_fill(int *pnfds, | |
269 | fd_set *readfds, fd_set *writefds, fd_set *xfds) | |
270 | { | |
271 | Slirp *slirp; | |
272 | struct socket *so, *so_next; | |
273 | int nfds; | |
274 | ||
275 | if (QTAILQ_EMPTY(&slirp_instances)) { | |
276 | return; | |
277 | } | |
278 | ||
279 | /* fail safe */ | |
280 | global_readfds = NULL; | |
281 | global_writefds = NULL; | |
282 | global_xfds = NULL; | |
283 | ||
284 | nfds = *pnfds; | |
285 | /* | |
286 | * First, TCP sockets | |
287 | */ | |
288 | do_slowtimo = 0; | |
289 | ||
290 | QTAILQ_FOREACH(slirp, &slirp_instances, entry) { | |
291 | /* | |
292 | * *_slowtimo needs calling if there are IP fragments | |
293 | * in the fragment queue, or there are TCP connections active | |
294 | */ | |
295 | do_slowtimo |= ((slirp->tcb.so_next != &slirp->tcb) || | |
296 | (&slirp->ipq.ip_link != slirp->ipq.ip_link.next)); | |
297 | ||
298 | for (so = slirp->tcb.so_next; so != &slirp->tcb; | |
299 | so = so_next) { | |
300 | so_next = so->so_next; | |
301 | ||
302 | /* | |
303 | * See if we need a tcp_fasttimo | |
304 | */ | |
305 | if (time_fasttimo == 0 && so->so_tcpcb->t_flags & TF_DELACK) | |
306 | time_fasttimo = curtime; /* Flag when we want a fasttimo */ | |
307 | ||
308 | /* | |
309 | * NOFDREF can include still connecting to local-host, | |
310 | * newly socreated() sockets etc. Don't want to select these. | |
311 | */ | |
312 | if (so->so_state & SS_NOFDREF || so->s == -1) | |
313 | continue; | |
314 | ||
315 | /* | |
316 | * Set for reading sockets which are accepting | |
317 | */ | |
318 | if (so->so_state & SS_FACCEPTCONN) { | |
319 | FD_SET(so->s, readfds); | |
320 | UPD_NFDS(so->s); | |
321 | continue; | |
322 | } | |
323 | ||
324 | /* | |
325 | * Set for writing sockets which are connecting | |
326 | */ | |
327 | if (so->so_state & SS_ISFCONNECTING) { | |
328 | FD_SET(so->s, writefds); | |
329 | UPD_NFDS(so->s); | |
330 | continue; | |
331 | } | |
332 | ||
333 | /* | |
334 | * Set for writing if we are connected, can send more, and | |
335 | * we have something to send | |
336 | */ | |
337 | if (CONN_CANFSEND(so) && so->so_rcv.sb_cc) { | |
338 | FD_SET(so->s, writefds); | |
339 | UPD_NFDS(so->s); | |
340 | } | |
341 | ||
342 | /* | |
343 | * Set for reading (and urgent data) if we are connected, can | |
344 | * receive more, and we have room for it XXX /2 ? | |
345 | */ | |
346 | if (CONN_CANFRCV(so) && (so->so_snd.sb_cc < (so->so_snd.sb_datalen/2))) { | |
347 | FD_SET(so->s, readfds); | |
348 | FD_SET(so->s, xfds); | |
349 | UPD_NFDS(so->s); | |
350 | } | |
351 | } | |
352 | ||
353 | /* | |
354 | * UDP sockets | |
355 | */ | |
356 | for (so = slirp->udb.so_next; so != &slirp->udb; | |
357 | so = so_next) { | |
358 | so_next = so->so_next; | |
359 | ||
360 | /* | |
361 | * See if it's timed out | |
362 | */ | |
363 | if (so->so_expire) { | |
364 | if (so->so_expire <= curtime) { | |
365 | udp_detach(so); | |
366 | continue; | |
367 | } else | |
368 | do_slowtimo = 1; /* Let socket expire */ | |
369 | } | |
370 | ||
371 | /* | |
372 | * When UDP packets are received from over the | |
373 | * link, they're sendto()'d straight away, so | |
374 | * no need for setting for writing | |
375 | * Limit the number of packets queued by this session | |
376 | * to 4. Note that even though we try and limit this | |
377 | * to 4 packets, the session could have more queued | |
378 | * if the packets needed to be fragmented | |
379 | * (XXX <= 4 ?) | |
380 | */ | |
381 | if ((so->so_state & SS_ISFCONNECTED) && so->so_queued <= 4) { | |
382 | FD_SET(so->s, readfds); | |
383 | UPD_NFDS(so->s); | |
384 | } | |
385 | } | |
386 | ||
387 | /* | |
388 | * ICMP sockets | |
389 | */ | |
390 | for (so = slirp->icmp.so_next; so != &slirp->icmp; | |
391 | so = so_next) { | |
392 | so_next = so->so_next; | |
393 | ||
394 | /* | |
395 | * See if it's timed out | |
396 | */ | |
397 | if (so->so_expire) { | |
398 | if (so->so_expire <= curtime) { | |
399 | icmp_detach(so); | |
400 | continue; | |
401 | } else { | |
402 | do_slowtimo = 1; /* Let socket expire */ | |
403 | } | |
404 | } | |
405 | ||
406 | if (so->so_state & SS_ISFCONNECTED) { | |
407 | FD_SET(so->s, readfds); | |
408 | UPD_NFDS(so->s); | |
409 | } | |
410 | } | |
411 | } | |
412 | ||
413 | *pnfds = nfds; | |
414 | } | |
415 | ||
416 | void slirp_select_poll(fd_set *readfds, fd_set *writefds, fd_set *xfds, | |
417 | int select_error) | |
418 | { | |
419 | Slirp *slirp; | |
420 | struct socket *so, *so_next; | |
421 | int ret; | |
422 | ||
423 | if (QTAILQ_EMPTY(&slirp_instances)) { | |
424 | return; | |
425 | } | |
426 | ||
427 | global_readfds = readfds; | |
428 | global_writefds = writefds; | |
429 | global_xfds = xfds; | |
430 | ||
431 | curtime = qemu_get_clock_ms(rt_clock); | |
432 | ||
433 | QTAILQ_FOREACH(slirp, &slirp_instances, entry) { | |
434 | /* | |
435 | * See if anything has timed out | |
436 | */ | |
437 | if (time_fasttimo && ((curtime - time_fasttimo) >= 2)) { | |
438 | tcp_fasttimo(slirp); | |
439 | time_fasttimo = 0; | |
440 | } | |
441 | if (do_slowtimo && ((curtime - last_slowtimo) >= 499)) { | |
442 | ip_slowtimo(slirp); | |
443 | tcp_slowtimo(slirp); | |
444 | last_slowtimo = curtime; | |
445 | } | |
446 | ||
447 | /* | |
448 | * Check sockets | |
449 | */ | |
450 | if (!select_error) { | |
451 | /* | |
452 | * Check TCP sockets | |
453 | */ | |
454 | for (so = slirp->tcb.so_next; so != &slirp->tcb; | |
455 | so = so_next) { | |
456 | so_next = so->so_next; | |
457 | ||
458 | /* | |
459 | * FD_ISSET is meaningless on these sockets | |
460 | * (and they can crash the program) | |
461 | */ | |
462 | if (so->so_state & SS_NOFDREF || so->s == -1) | |
463 | continue; | |
464 | ||
465 | /* | |
466 | * Check for URG data | |
467 | * This will soread as well, so no need to | |
468 | * test for readfds below if this succeeds | |
469 | */ | |
470 | if (FD_ISSET(so->s, xfds)) | |
471 | sorecvoob(so); | |
472 | /* | |
473 | * Check sockets for reading | |
474 | */ | |
475 | else if (FD_ISSET(so->s, readfds)) { | |
476 | /* | |
477 | * Check for incoming connections | |
478 | */ | |
479 | if (so->so_state & SS_FACCEPTCONN) { | |
480 | tcp_connect(so); | |
481 | continue; | |
482 | } /* else */ | |
483 | ret = soread(so); | |
484 | ||
485 | /* Output it if we read something */ | |
486 | if (ret > 0) | |
487 | tcp_output(sototcpcb(so)); | |
488 | } | |
489 | ||
490 | /* | |
491 | * Check sockets for writing | |
492 | */ | |
493 | if (FD_ISSET(so->s, writefds)) { | |
494 | /* | |
495 | * Check for non-blocking, still-connecting sockets | |
496 | */ | |
497 | if (so->so_state & SS_ISFCONNECTING) { | |
498 | /* Connected */ | |
499 | so->so_state &= ~SS_ISFCONNECTING; | |
500 | ||
501 | ret = send(so->s, (const void *) &ret, 0, 0); | |
502 | if (ret < 0) { | |
503 | /* XXXXX Must fix, zero bytes is a NOP */ | |
504 | if (errno == EAGAIN || errno == EWOULDBLOCK || | |
505 | errno == EINPROGRESS || errno == ENOTCONN) | |
506 | continue; | |
507 | ||
508 | /* else failed */ | |
509 | so->so_state &= SS_PERSISTENT_MASK; | |
510 | so->so_state |= SS_NOFDREF; | |
511 | } | |
512 | /* else so->so_state &= ~SS_ISFCONNECTING; */ | |
513 | ||
514 | /* | |
515 | * Continue tcp_input | |
516 | */ | |
517 | tcp_input((struct mbuf *)NULL, sizeof(struct ip), so); | |
518 | /* continue; */ | |
519 | } else | |
520 | ret = sowrite(so); | |
521 | /* | |
522 | * XXXXX If we wrote something (a lot), there | |
523 | * could be a need for a window update. | |
524 | * In the worst case, the remote will send | |
525 | * a window probe to get things going again | |
526 | */ | |
527 | } | |
528 | ||
529 | /* | |
530 | * Probe a still-connecting, non-blocking socket | |
531 | * to check if it's still alive | |
532 | */ | |
533 | #ifdef PROBE_CONN | |
534 | if (so->so_state & SS_ISFCONNECTING) { | |
535 | ret = qemu_recv(so->s, &ret, 0,0); | |
536 | ||
537 | if (ret < 0) { | |
538 | /* XXX */ | |
539 | if (errno == EAGAIN || errno == EWOULDBLOCK || | |
540 | errno == EINPROGRESS || errno == ENOTCONN) | |
541 | continue; /* Still connecting, continue */ | |
542 | ||
543 | /* else failed */ | |
544 | so->so_state &= SS_PERSISTENT_MASK; | |
545 | so->so_state |= SS_NOFDREF; | |
546 | ||
547 | /* tcp_input will take care of it */ | |
548 | } else { | |
549 | ret = send(so->s, &ret, 0,0); | |
550 | if (ret < 0) { | |
551 | /* XXX */ | |
552 | if (errno == EAGAIN || errno == EWOULDBLOCK || | |
553 | errno == EINPROGRESS || errno == ENOTCONN) | |
554 | continue; | |
555 | /* else failed */ | |
556 | so->so_state &= SS_PERSISTENT_MASK; | |
557 | so->so_state |= SS_NOFDREF; | |
558 | } else | |
559 | so->so_state &= ~SS_ISFCONNECTING; | |
560 | ||
561 | } | |
562 | tcp_input((struct mbuf *)NULL, sizeof(struct ip),so); | |
563 | } /* SS_ISFCONNECTING */ | |
564 | #endif | |
565 | } | |
566 | ||
567 | /* | |
568 | * Now UDP sockets. | |
569 | * Incoming packets are sent straight away, they're not buffered. | |
570 | * Incoming UDP data isn't buffered either. | |
571 | */ | |
572 | for (so = slirp->udb.so_next; so != &slirp->udb; | |
573 | so = so_next) { | |
574 | so_next = so->so_next; | |
575 | ||
576 | if (so->s != -1 && FD_ISSET(so->s, readfds)) { | |
577 | sorecvfrom(so); | |
578 | } | |
579 | } | |
580 | ||
581 | /* | |
582 | * Check incoming ICMP relies. | |
583 | */ | |
584 | for (so = slirp->icmp.so_next; so != &slirp->icmp; | |
585 | so = so_next) { | |
586 | so_next = so->so_next; | |
587 | ||
588 | if (so->s != -1 && FD_ISSET(so->s, readfds)) { | |
589 | icmp_receive(so); | |
590 | } | |
591 | } | |
592 | } | |
593 | ||
594 | if_start(slirp); | |
595 | } | |
596 | ||
597 | /* clear global file descriptor sets. | |
598 | * these reside on the stack in vl.c | |
599 | * so they're unusable if we're not in | |
600 | * slirp_select_fill or slirp_select_poll. | |
601 | */ | |
602 | global_readfds = NULL; | |
603 | global_writefds = NULL; | |
604 | global_xfds = NULL; | |
605 | } | |
606 | ||
607 | static void arp_input(Slirp *slirp, const uint8_t *pkt, int pkt_len) | |
608 | { | |
609 | struct arphdr *ah = (struct arphdr *)(pkt + ETH_HLEN); | |
610 | uint8_t arp_reply[max(ETH_HLEN + sizeof(struct arphdr), 64)]; | |
611 | struct ethhdr *reh = (struct ethhdr *)arp_reply; | |
612 | struct arphdr *rah = (struct arphdr *)(arp_reply + ETH_HLEN); | |
613 | int ar_op; | |
614 | struct ex_list *ex_ptr; | |
615 | ||
616 | ar_op = ntohs(ah->ar_op); | |
617 | switch(ar_op) { | |
618 | case ARPOP_REQUEST: | |
619 | if (ah->ar_tip == ah->ar_sip) { | |
620 | /* Gratuitous ARP */ | |
621 | arp_table_add(slirp, ah->ar_sip, ah->ar_sha); | |
622 | return; | |
623 | } | |
624 | ||
625 | if ((ah->ar_tip & slirp->vnetwork_mask.s_addr) == | |
626 | slirp->vnetwork_addr.s_addr) { | |
627 | if (ah->ar_tip == slirp->vnameserver_addr.s_addr || | |
628 | ah->ar_tip == slirp->vhost_addr.s_addr) | |
629 | goto arp_ok; | |
630 | for (ex_ptr = slirp->exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next) { | |
631 | if (ex_ptr->ex_addr.s_addr == ah->ar_tip) | |
632 | goto arp_ok; | |
633 | } | |
634 | return; | |
635 | arp_ok: | |
636 | memset(arp_reply, 0, sizeof(arp_reply)); | |
637 | ||
638 | arp_table_add(slirp, ah->ar_sip, ah->ar_sha); | |
639 | ||
640 | /* ARP request for alias/dns mac address */ | |
641 | memcpy(reh->h_dest, pkt + ETH_ALEN, ETH_ALEN); | |
642 | memcpy(reh->h_source, special_ethaddr, ETH_ALEN - 4); | |
643 | memcpy(&reh->h_source[2], &ah->ar_tip, 4); | |
644 | reh->h_proto = htons(ETH_P_ARP); | |
645 | ||
646 | rah->ar_hrd = htons(1); | |
647 | rah->ar_pro = htons(ETH_P_IP); | |
648 | rah->ar_hln = ETH_ALEN; | |
649 | rah->ar_pln = 4; | |
650 | rah->ar_op = htons(ARPOP_REPLY); | |
651 | memcpy(rah->ar_sha, reh->h_source, ETH_ALEN); | |
652 | rah->ar_sip = ah->ar_tip; | |
653 | memcpy(rah->ar_tha, ah->ar_sha, ETH_ALEN); | |
654 | rah->ar_tip = ah->ar_sip; | |
655 | slirp_output(slirp->opaque, arp_reply, sizeof(arp_reply)); | |
656 | } | |
657 | break; | |
658 | case ARPOP_REPLY: | |
659 | arp_table_add(slirp, ah->ar_sip, ah->ar_sha); | |
660 | break; | |
661 | default: | |
662 | break; | |
663 | } | |
664 | } | |
665 | ||
666 | void slirp_input(Slirp *slirp, const uint8_t *pkt, int pkt_len) | |
667 | { | |
668 | struct mbuf *m; | |
669 | int proto; | |
670 | ||
671 | if (pkt_len < ETH_HLEN) | |
672 | return; | |
673 | ||
674 | proto = ntohs(*(uint16_t *)(pkt + 12)); | |
675 | switch(proto) { | |
676 | case ETH_P_ARP: | |
677 | arp_input(slirp, pkt, pkt_len); | |
678 | break; | |
679 | case ETH_P_IP: | |
680 | m = m_get(slirp); | |
681 | if (!m) | |
682 | return; | |
683 | /* Note: we add to align the IP header */ | |
684 | if (M_FREEROOM(m) < pkt_len + 2) { | |
685 | m_inc(m, pkt_len + 2); | |
686 | } | |
687 | m->m_len = pkt_len + 2; | |
688 | memcpy(m->m_data + 2, pkt, pkt_len); | |
689 | ||
690 | m->m_data += 2 + ETH_HLEN; | |
691 | m->m_len -= 2 + ETH_HLEN; | |
692 | ||
693 | ip_input(m); | |
694 | break; | |
695 | default: | |
696 | break; | |
697 | } | |
698 | } | |
699 | ||
700 | /* Output the IP packet to the ethernet device. Returns 0 if the packet must be | |
701 | * re-queued. | |
702 | */ | |
703 | int if_encap(Slirp *slirp, struct mbuf *ifm) | |
704 | { | |
705 | uint8_t buf[1600]; | |
706 | struct ethhdr *eh = (struct ethhdr *)buf; | |
707 | uint8_t ethaddr[ETH_ALEN]; | |
708 | const struct ip *iph = (const struct ip *)ifm->m_data; | |
709 | ||
710 | if (ifm->m_len + ETH_HLEN > sizeof(buf)) { | |
711 | return 1; | |
712 | } | |
713 | ||
714 | if (!arp_table_search(slirp, iph->ip_dst.s_addr, ethaddr)) { | |
715 | uint8_t arp_req[ETH_HLEN + sizeof(struct arphdr)]; | |
716 | struct ethhdr *reh = (struct ethhdr *)arp_req; | |
717 | struct arphdr *rah = (struct arphdr *)(arp_req + ETH_HLEN); | |
718 | ||
719 | if (!ifm->arp_requested) { | |
720 | /* If the client addr is not known, send an ARP request */ | |
721 | memset(reh->h_dest, 0xff, ETH_ALEN); | |
722 | memcpy(reh->h_source, special_ethaddr, ETH_ALEN - 4); | |
723 | memcpy(&reh->h_source[2], &slirp->vhost_addr, 4); | |
724 | reh->h_proto = htons(ETH_P_ARP); | |
725 | rah->ar_hrd = htons(1); | |
726 | rah->ar_pro = htons(ETH_P_IP); | |
727 | rah->ar_hln = ETH_ALEN; | |
728 | rah->ar_pln = 4; | |
729 | rah->ar_op = htons(ARPOP_REQUEST); | |
730 | ||
731 | /* source hw addr */ | |
732 | memcpy(rah->ar_sha, special_ethaddr, ETH_ALEN - 4); | |
733 | memcpy(&rah->ar_sha[2], &slirp->vhost_addr, 4); | |
734 | ||
735 | /* source IP */ | |
736 | rah->ar_sip = slirp->vhost_addr.s_addr; | |
737 | ||
738 | /* target hw addr (none) */ | |
739 | memset(rah->ar_tha, 0, ETH_ALEN); | |
740 | ||
741 | /* target IP */ | |
742 | rah->ar_tip = iph->ip_dst.s_addr; | |
743 | slirp->client_ipaddr = iph->ip_dst; | |
744 | slirp_output(slirp->opaque, arp_req, sizeof(arp_req)); | |
745 | ifm->arp_requested = true; | |
746 | ||
747 | /* Expire request and drop outgoing packet after 1 second */ | |
748 | ifm->expiration_date = qemu_get_clock_ns(rt_clock) + 1000000000ULL; | |
749 | } | |
750 | return 0; | |
751 | } else { | |
752 | memcpy(eh->h_dest, ethaddr, ETH_ALEN); | |
753 | memcpy(eh->h_source, special_ethaddr, ETH_ALEN - 4); | |
754 | /* XXX: not correct */ | |
755 | memcpy(&eh->h_source[2], &slirp->vhost_addr, 4); | |
756 | eh->h_proto = htons(ETH_P_IP); | |
757 | memcpy(buf + sizeof(struct ethhdr), ifm->m_data, ifm->m_len); | |
758 | slirp_output(slirp->opaque, buf, ifm->m_len + ETH_HLEN); | |
759 | return 1; | |
760 | } | |
761 | } | |
762 | ||
763 | /* Drop host forwarding rule, return 0 if found. */ | |
764 | int slirp_remove_hostfwd(Slirp *slirp, int is_udp, struct in_addr host_addr, | |
765 | int host_port) | |
766 | { | |
767 | struct socket *so; | |
768 | struct socket *head = (is_udp ? &slirp->udb : &slirp->tcb); | |
769 | struct sockaddr_in addr; | |
770 | int port = htons(host_port); | |
771 | socklen_t addr_len; | |
772 | ||
773 | for (so = head->so_next; so != head; so = so->so_next) { | |
774 | addr_len = sizeof(addr); | |
775 | if ((so->so_state & SS_HOSTFWD) && | |
776 | getsockname(so->s, (struct sockaddr *)&addr, &addr_len) == 0 && | |
777 | addr.sin_addr.s_addr == host_addr.s_addr && | |
778 | addr.sin_port == port) { | |
779 | close(so->s); | |
780 | sofree(so); | |
781 | return 0; | |
782 | } | |
783 | } | |
784 | ||
785 | return -1; | |
786 | } | |
787 | ||
788 | int slirp_add_hostfwd(Slirp *slirp, int is_udp, struct in_addr host_addr, | |
789 | int host_port, struct in_addr guest_addr, int guest_port) | |
790 | { | |
791 | if (!guest_addr.s_addr) { | |
792 | guest_addr = slirp->vdhcp_startaddr; | |
793 | } | |
794 | if (is_udp) { | |
795 | if (!udp_listen(slirp, host_addr.s_addr, htons(host_port), | |
796 | guest_addr.s_addr, htons(guest_port), SS_HOSTFWD)) | |
797 | return -1; | |
798 | } else { | |
799 | if (!tcp_listen(slirp, host_addr.s_addr, htons(host_port), | |
800 | guest_addr.s_addr, htons(guest_port), SS_HOSTFWD)) | |
801 | return -1; | |
802 | } | |
803 | return 0; | |
804 | } | |
805 | ||
806 | int slirp_add_exec(Slirp *slirp, int do_pty, const void *args, | |
807 | struct in_addr *guest_addr, int guest_port) | |
808 | { | |
809 | if (!guest_addr->s_addr) { | |
810 | guest_addr->s_addr = slirp->vnetwork_addr.s_addr | | |
811 | (htonl(0x0204) & ~slirp->vnetwork_mask.s_addr); | |
812 | } | |
813 | if ((guest_addr->s_addr & slirp->vnetwork_mask.s_addr) != | |
814 | slirp->vnetwork_addr.s_addr || | |
815 | guest_addr->s_addr == slirp->vhost_addr.s_addr || | |
816 | guest_addr->s_addr == slirp->vnameserver_addr.s_addr) { | |
817 | return -1; | |
818 | } | |
819 | return add_exec(&slirp->exec_list, do_pty, (char *)args, *guest_addr, | |
820 | htons(guest_port)); | |
821 | } | |
822 | ||
823 | ssize_t slirp_send(struct socket *so, const void *buf, size_t len, int flags) | |
824 | { | |
825 | if (so->s == -1 && so->extra) { | |
826 | qemu_chr_fe_write(so->extra, buf, len); | |
827 | return len; | |
828 | } | |
829 | ||
830 | return send(so->s, buf, len, flags); | |
831 | } | |
832 | ||
833 | static struct socket * | |
834 | slirp_find_ctl_socket(Slirp *slirp, struct in_addr guest_addr, int guest_port) | |
835 | { | |
836 | struct socket *so; | |
837 | ||
838 | for (so = slirp->tcb.so_next; so != &slirp->tcb; so = so->so_next) { | |
839 | if (so->so_faddr.s_addr == guest_addr.s_addr && | |
840 | htons(so->so_fport) == guest_port) { | |
841 | return so; | |
842 | } | |
843 | } | |
844 | return NULL; | |
845 | } | |
846 | ||
847 | size_t slirp_socket_can_recv(Slirp *slirp, struct in_addr guest_addr, | |
848 | int guest_port) | |
849 | { | |
850 | struct iovec iov[2]; | |
851 | struct socket *so; | |
852 | ||
853 | so = slirp_find_ctl_socket(slirp, guest_addr, guest_port); | |
854 | ||
855 | if (!so || so->so_state & SS_NOFDREF) | |
856 | return 0; | |
857 | ||
858 | if (!CONN_CANFRCV(so) || so->so_snd.sb_cc >= (so->so_snd.sb_datalen/2)) | |
859 | return 0; | |
860 | ||
861 | return sopreprbuf(so, iov, NULL); | |
862 | } | |
863 | ||
864 | void slirp_socket_recv(Slirp *slirp, struct in_addr guest_addr, int guest_port, | |
865 | const uint8_t *buf, int size) | |
866 | { | |
867 | int ret; | |
868 | struct socket *so = slirp_find_ctl_socket(slirp, guest_addr, guest_port); | |
869 | ||
870 | if (!so) | |
871 | return; | |
872 | ||
873 | ret = soreadbuf(so, (const char *)buf, size); | |
874 | ||
875 | if (ret > 0) | |
876 | tcp_output(sototcpcb(so)); | |
877 | } | |
878 | ||
879 | static void slirp_tcp_save(QEMUFile *f, struct tcpcb *tp) | |
880 | { | |
881 | int i; | |
882 | ||
883 | qemu_put_sbe16(f, tp->t_state); | |
884 | for (i = 0; i < TCPT_NTIMERS; i++) | |
885 | qemu_put_sbe16(f, tp->t_timer[i]); | |
886 | qemu_put_sbe16(f, tp->t_rxtshift); | |
887 | qemu_put_sbe16(f, tp->t_rxtcur); | |
888 | qemu_put_sbe16(f, tp->t_dupacks); | |
889 | qemu_put_be16(f, tp->t_maxseg); | |
890 | qemu_put_sbyte(f, tp->t_force); | |
891 | qemu_put_be16(f, tp->t_flags); | |
892 | qemu_put_be32(f, tp->snd_una); | |
893 | qemu_put_be32(f, tp->snd_nxt); | |
894 | qemu_put_be32(f, tp->snd_up); | |
895 | qemu_put_be32(f, tp->snd_wl1); | |
896 | qemu_put_be32(f, tp->snd_wl2); | |
897 | qemu_put_be32(f, tp->iss); | |
898 | qemu_put_be32(f, tp->snd_wnd); | |
899 | qemu_put_be32(f, tp->rcv_wnd); | |
900 | qemu_put_be32(f, tp->rcv_nxt); | |
901 | qemu_put_be32(f, tp->rcv_up); | |
902 | qemu_put_be32(f, tp->irs); | |
903 | qemu_put_be32(f, tp->rcv_adv); | |
904 | qemu_put_be32(f, tp->snd_max); | |
905 | qemu_put_be32(f, tp->snd_cwnd); | |
906 | qemu_put_be32(f, tp->snd_ssthresh); | |
907 | qemu_put_sbe16(f, tp->t_idle); | |
908 | qemu_put_sbe16(f, tp->t_rtt); | |
909 | qemu_put_be32(f, tp->t_rtseq); | |
910 | qemu_put_sbe16(f, tp->t_srtt); | |
911 | qemu_put_sbe16(f, tp->t_rttvar); | |
912 | qemu_put_be16(f, tp->t_rttmin); | |
913 | qemu_put_be32(f, tp->max_sndwnd); | |
914 | qemu_put_byte(f, tp->t_oobflags); | |
915 | qemu_put_byte(f, tp->t_iobc); | |
916 | qemu_put_sbe16(f, tp->t_softerror); | |
917 | qemu_put_byte(f, tp->snd_scale); | |
918 | qemu_put_byte(f, tp->rcv_scale); | |
919 | qemu_put_byte(f, tp->request_r_scale); | |
920 | qemu_put_byte(f, tp->requested_s_scale); | |
921 | qemu_put_be32(f, tp->ts_recent); | |
922 | qemu_put_be32(f, tp->ts_recent_age); | |
923 | qemu_put_be32(f, tp->last_ack_sent); | |
924 | } | |
925 | ||
926 | static void slirp_sbuf_save(QEMUFile *f, struct sbuf *sbuf) | |
927 | { | |
928 | uint32_t off; | |
929 | ||
930 | qemu_put_be32(f, sbuf->sb_cc); | |
931 | qemu_put_be32(f, sbuf->sb_datalen); | |
932 | off = (uint32_t)(sbuf->sb_wptr - sbuf->sb_data); | |
933 | qemu_put_sbe32(f, off); | |
934 | off = (uint32_t)(sbuf->sb_rptr - sbuf->sb_data); | |
935 | qemu_put_sbe32(f, off); | |
936 | qemu_put_buffer(f, (unsigned char*)sbuf->sb_data, sbuf->sb_datalen); | |
937 | } | |
938 | ||
939 | static void slirp_socket_save(QEMUFile *f, struct socket *so) | |
940 | { | |
941 | qemu_put_be32(f, so->so_urgc); | |
942 | qemu_put_be32(f, so->so_faddr.s_addr); | |
943 | qemu_put_be32(f, so->so_laddr.s_addr); | |
944 | qemu_put_be16(f, so->so_fport); | |
945 | qemu_put_be16(f, so->so_lport); | |
946 | qemu_put_byte(f, so->so_iptos); | |
947 | qemu_put_byte(f, so->so_emu); | |
948 | qemu_put_byte(f, so->so_type); | |
949 | qemu_put_be32(f, so->so_state); | |
950 | slirp_sbuf_save(f, &so->so_rcv); | |
951 | slirp_sbuf_save(f, &so->so_snd); | |
952 | slirp_tcp_save(f, so->so_tcpcb); | |
953 | } | |
954 | ||
955 | static void slirp_bootp_save(QEMUFile *f, Slirp *slirp) | |
956 | { | |
957 | int i; | |
958 | ||
959 | for (i = 0; i < NB_BOOTP_CLIENTS; i++) { | |
960 | qemu_put_be16(f, slirp->bootp_clients[i].allocated); | |
961 | qemu_put_buffer(f, slirp->bootp_clients[i].macaddr, 6); | |
962 | } | |
963 | } | |
964 | ||
965 | static void slirp_state_save(QEMUFile *f, void *opaque) | |
966 | { | |
967 | Slirp *slirp = opaque; | |
968 | struct ex_list *ex_ptr; | |
969 | ||
970 | for (ex_ptr = slirp->exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next) | |
971 | if (ex_ptr->ex_pty == 3) { | |
972 | struct socket *so; | |
973 | so = slirp_find_ctl_socket(slirp, ex_ptr->ex_addr, | |
974 | ntohs(ex_ptr->ex_fport)); | |
975 | if (!so) | |
976 | continue; | |
977 | ||
978 | qemu_put_byte(f, 42); | |
979 | slirp_socket_save(f, so); | |
980 | } | |
981 | qemu_put_byte(f, 0); | |
982 | ||
983 | qemu_put_be16(f, slirp->ip_id); | |
984 | ||
985 | slirp_bootp_save(f, slirp); | |
986 | } | |
987 | ||
988 | static void slirp_tcp_load(QEMUFile *f, struct tcpcb *tp) | |
989 | { | |
990 | int i; | |
991 | ||
992 | tp->t_state = qemu_get_sbe16(f); | |
993 | for (i = 0; i < TCPT_NTIMERS; i++) | |
994 | tp->t_timer[i] = qemu_get_sbe16(f); | |
995 | tp->t_rxtshift = qemu_get_sbe16(f); | |
996 | tp->t_rxtcur = qemu_get_sbe16(f); | |
997 | tp->t_dupacks = qemu_get_sbe16(f); | |
998 | tp->t_maxseg = qemu_get_be16(f); | |
999 | tp->t_force = qemu_get_sbyte(f); | |
1000 | tp->t_flags = qemu_get_be16(f); | |
1001 | tp->snd_una = qemu_get_be32(f); | |
1002 | tp->snd_nxt = qemu_get_be32(f); | |
1003 | tp->snd_up = qemu_get_be32(f); | |
1004 | tp->snd_wl1 = qemu_get_be32(f); | |
1005 | tp->snd_wl2 = qemu_get_be32(f); | |
1006 | tp->iss = qemu_get_be32(f); | |
1007 | tp->snd_wnd = qemu_get_be32(f); | |
1008 | tp->rcv_wnd = qemu_get_be32(f); | |
1009 | tp->rcv_nxt = qemu_get_be32(f); | |
1010 | tp->rcv_up = qemu_get_be32(f); | |
1011 | tp->irs = qemu_get_be32(f); | |
1012 | tp->rcv_adv = qemu_get_be32(f); | |
1013 | tp->snd_max = qemu_get_be32(f); | |
1014 | tp->snd_cwnd = qemu_get_be32(f); | |
1015 | tp->snd_ssthresh = qemu_get_be32(f); | |
1016 | tp->t_idle = qemu_get_sbe16(f); | |
1017 | tp->t_rtt = qemu_get_sbe16(f); | |
1018 | tp->t_rtseq = qemu_get_be32(f); | |
1019 | tp->t_srtt = qemu_get_sbe16(f); | |
1020 | tp->t_rttvar = qemu_get_sbe16(f); | |
1021 | tp->t_rttmin = qemu_get_be16(f); | |
1022 | tp->max_sndwnd = qemu_get_be32(f); | |
1023 | tp->t_oobflags = qemu_get_byte(f); | |
1024 | tp->t_iobc = qemu_get_byte(f); | |
1025 | tp->t_softerror = qemu_get_sbe16(f); | |
1026 | tp->snd_scale = qemu_get_byte(f); | |
1027 | tp->rcv_scale = qemu_get_byte(f); | |
1028 | tp->request_r_scale = qemu_get_byte(f); | |
1029 | tp->requested_s_scale = qemu_get_byte(f); | |
1030 | tp->ts_recent = qemu_get_be32(f); | |
1031 | tp->ts_recent_age = qemu_get_be32(f); | |
1032 | tp->last_ack_sent = qemu_get_be32(f); | |
1033 | tcp_template(tp); | |
1034 | } | |
1035 | ||
1036 | static int slirp_sbuf_load(QEMUFile *f, struct sbuf *sbuf) | |
1037 | { | |
1038 | uint32_t off, sb_cc, sb_datalen; | |
1039 | ||
1040 | sb_cc = qemu_get_be32(f); | |
1041 | sb_datalen = qemu_get_be32(f); | |
1042 | ||
1043 | sbreserve(sbuf, sb_datalen); | |
1044 | ||
1045 | if (sbuf->sb_datalen != sb_datalen) | |
1046 | return -ENOMEM; | |
1047 | ||
1048 | sbuf->sb_cc = sb_cc; | |
1049 | ||
1050 | off = qemu_get_sbe32(f); | |
1051 | sbuf->sb_wptr = sbuf->sb_data + off; | |
1052 | off = qemu_get_sbe32(f); | |
1053 | sbuf->sb_rptr = sbuf->sb_data + off; | |
1054 | qemu_get_buffer(f, (unsigned char*)sbuf->sb_data, sbuf->sb_datalen); | |
1055 | ||
1056 | return 0; | |
1057 | } | |
1058 | ||
1059 | static int slirp_socket_load(QEMUFile *f, struct socket *so) | |
1060 | { | |
1061 | if (tcp_attach(so) < 0) | |
1062 | return -ENOMEM; | |
1063 | ||
1064 | so->so_urgc = qemu_get_be32(f); | |
1065 | so->so_faddr.s_addr = qemu_get_be32(f); | |
1066 | so->so_laddr.s_addr = qemu_get_be32(f); | |
1067 | so->so_fport = qemu_get_be16(f); | |
1068 | so->so_lport = qemu_get_be16(f); | |
1069 | so->so_iptos = qemu_get_byte(f); | |
1070 | so->so_emu = qemu_get_byte(f); | |
1071 | so->so_type = qemu_get_byte(f); | |
1072 | so->so_state = qemu_get_be32(f); | |
1073 | if (slirp_sbuf_load(f, &so->so_rcv) < 0) | |
1074 | return -ENOMEM; | |
1075 | if (slirp_sbuf_load(f, &so->so_snd) < 0) | |
1076 | return -ENOMEM; | |
1077 | slirp_tcp_load(f, so->so_tcpcb); | |
1078 | ||
1079 | return 0; | |
1080 | } | |
1081 | ||
1082 | static void slirp_bootp_load(QEMUFile *f, Slirp *slirp) | |
1083 | { | |
1084 | int i; | |
1085 | ||
1086 | for (i = 0; i < NB_BOOTP_CLIENTS; i++) { | |
1087 | slirp->bootp_clients[i].allocated = qemu_get_be16(f); | |
1088 | qemu_get_buffer(f, slirp->bootp_clients[i].macaddr, 6); | |
1089 | } | |
1090 | } | |
1091 | ||
1092 | static int slirp_state_load(QEMUFile *f, void *opaque, int version_id) | |
1093 | { | |
1094 | Slirp *slirp = opaque; | |
1095 | struct ex_list *ex_ptr; | |
1096 | ||
1097 | while (qemu_get_byte(f)) { | |
1098 | int ret; | |
1099 | struct socket *so = socreate(slirp); | |
1100 | ||
1101 | if (!so) | |
1102 | return -ENOMEM; | |
1103 | ||
1104 | ret = slirp_socket_load(f, so); | |
1105 | ||
1106 | if (ret < 0) | |
1107 | return ret; | |
1108 | ||
1109 | if ((so->so_faddr.s_addr & slirp->vnetwork_mask.s_addr) != | |
1110 | slirp->vnetwork_addr.s_addr) { | |
1111 | return -EINVAL; | |
1112 | } | |
1113 | for (ex_ptr = slirp->exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next) { | |
1114 | if (ex_ptr->ex_pty == 3 && | |
1115 | so->so_faddr.s_addr == ex_ptr->ex_addr.s_addr && | |
1116 | so->so_fport == ex_ptr->ex_fport) { | |
1117 | break; | |
1118 | } | |
1119 | } | |
1120 | if (!ex_ptr) | |
1121 | return -EINVAL; | |
1122 | ||
1123 | so->extra = (void *)ex_ptr->ex_exec; | |
1124 | } | |
1125 | ||
1126 | if (version_id >= 2) { | |
1127 | slirp->ip_id = qemu_get_be16(f); | |
1128 | } | |
1129 | ||
1130 | if (version_id >= 3) { | |
1131 | slirp_bootp_load(f, slirp); | |
1132 | } | |
1133 | ||
1134 | return 0; | |
1135 | } |