]>
Commit | Line | Data |
---|---|---|
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_ms(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 | } |