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d75a0b97 FB |
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 | */ | |
e1c5a2b3 | 24 | #include "qemu-common.h" |
0580ac91 | 25 | #include "qemu-char.h" |
f0cbd3ec | 26 | #include "slirp.h" |
062e5527 | 27 | #include "hw/hw.h" |
f0cbd3ec FB |
28 | |
29 | /* host address */ | |
30 | struct in_addr our_addr; | |
31 | /* host dns address */ | |
32 | struct in_addr dns_addr; | |
33 | /* host loopback address */ | |
34 | struct in_addr loopback_addr; | |
35 | ||
36 | /* address for slirp virtual addresses */ | |
37 | struct in_addr special_addr; | |
8dbca8dd FB |
38 | /* virtual address alias for host */ |
39 | struct in_addr alias_addr; | |
f0cbd3ec | 40 | |
9634d903 | 41 | static const uint8_t special_ethaddr[6] = { |
f0cbd3ec FB |
42 | 0x52, 0x54, 0x00, 0x12, 0x35, 0x00 |
43 | }; | |
44 | ||
de806f07 | 45 | /* ARP cache for the guest IP addresses (XXX: allow many entries) */ |
f0cbd3ec | 46 | uint8_t client_ethaddr[6]; |
de806f07 FB |
47 | static struct in_addr client_ipaddr; |
48 | ||
49 | static const uint8_t zero_ethaddr[6] = { 0, 0, 0, 0, 0, 0 }; | |
f0cbd3ec | 50 | |
0580ac91 | 51 | const char *slirp_special_ip = CTL_SPECIAL; |
a9ba3a85 | 52 | int slirp_restrict; |
511d2b14 | 53 | static int do_slowtimo; |
f0cbd3ec FB |
54 | int link_up; |
55 | struct timeval tt; | |
56 | FILE *lfd; | |
a3d4af03 | 57 | struct ex_list *exec_list; |
f0cbd3ec FB |
58 | |
59 | /* XXX: suppress those select globals */ | |
60 | fd_set *global_readfds, *global_writefds, *global_xfds; | |
61 | ||
3f423c9c | 62 | char slirp_hostname[33]; |
115defd1 | 63 | |
f0cbd3ec FB |
64 | #ifdef _WIN32 |
65 | ||
66 | static int get_dns_addr(struct in_addr *pdns_addr) | |
67 | { | |
379ff53d FB |
68 | FIXED_INFO *FixedInfo=NULL; |
69 | ULONG BufLen; | |
70 | DWORD ret; | |
71 | IP_ADDR_STRING *pIPAddr; | |
72 | struct in_addr tmp_addr; | |
3b46e624 | 73 | |
379ff53d FB |
74 | FixedInfo = (FIXED_INFO *)GlobalAlloc(GPTR, sizeof(FIXED_INFO)); |
75 | BufLen = sizeof(FIXED_INFO); | |
3b46e624 | 76 | |
379ff53d FB |
77 | if (ERROR_BUFFER_OVERFLOW == GetNetworkParams(FixedInfo, &BufLen)) { |
78 | if (FixedInfo) { | |
79 | GlobalFree(FixedInfo); | |
80 | FixedInfo = NULL; | |
81 | } | |
82 | FixedInfo = GlobalAlloc(GPTR, BufLen); | |
83 | } | |
5fafdf24 | 84 | |
379ff53d FB |
85 | if ((ret = GetNetworkParams(FixedInfo, &BufLen)) != ERROR_SUCCESS) { |
86 | printf("GetNetworkParams failed. ret = %08x\n", (u_int)ret ); | |
87 | if (FixedInfo) { | |
88 | GlobalFree(FixedInfo); | |
89 | FixedInfo = NULL; | |
90 | } | |
91 | return -1; | |
92 | } | |
3b46e624 | 93 | |
379ff53d FB |
94 | pIPAddr = &(FixedInfo->DnsServerList); |
95 | inet_aton(pIPAddr->IpAddress.String, &tmp_addr); | |
96 | *pdns_addr = tmp_addr; | |
97 | #if 0 | |
98 | printf( "DNS Servers:\n" ); | |
99 | printf( "DNS Addr:%s\n", pIPAddr->IpAddress.String ); | |
3b46e624 | 100 | |
379ff53d FB |
101 | pIPAddr = FixedInfo -> DnsServerList.Next; |
102 | while ( pIPAddr ) { | |
103 | printf( "DNS Addr:%s\n", pIPAddr ->IpAddress.String ); | |
104 | pIPAddr = pIPAddr ->Next; | |
105 | } | |
106 | #endif | |
107 | if (FixedInfo) { | |
108 | GlobalFree(FixedInfo); | |
109 | FixedInfo = NULL; | |
110 | } | |
111 | return 0; | |
f0cbd3ec FB |
112 | } |
113 | ||
114 | #else | |
115 | ||
116 | static int get_dns_addr(struct in_addr *pdns_addr) | |
117 | { | |
118 | char buff[512]; | |
363a37d5 | 119 | char buff2[257]; |
f0cbd3ec FB |
120 | FILE *f; |
121 | int found = 0; | |
122 | struct in_addr tmp_addr; | |
3b46e624 | 123 | |
f0cbd3ec FB |
124 | f = fopen("/etc/resolv.conf", "r"); |
125 | if (!f) | |
126 | return -1; | |
127 | ||
31a60e22 | 128 | #ifdef DEBUG |
f0cbd3ec | 129 | lprint("IP address of your DNS(s): "); |
31a60e22 | 130 | #endif |
f0cbd3ec FB |
131 | while (fgets(buff, 512, f) != NULL) { |
132 | if (sscanf(buff, "nameserver%*[ \t]%256s", buff2) == 1) { | |
133 | if (!inet_aton(buff2, &tmp_addr)) | |
134 | continue; | |
135 | if (tmp_addr.s_addr == loopback_addr.s_addr) | |
136 | tmp_addr = our_addr; | |
137 | /* If it's the first one, set it to dns_addr */ | |
138 | if (!found) | |
139 | *pdns_addr = tmp_addr; | |
31a60e22 | 140 | #ifdef DEBUG |
f0cbd3ec FB |
141 | else |
142 | lprint(", "); | |
31a60e22 | 143 | #endif |
f0cbd3ec | 144 | if (++found > 3) { |
31a60e22 | 145 | #ifdef DEBUG |
f0cbd3ec | 146 | lprint("(more)"); |
31a60e22 | 147 | #endif |
f0cbd3ec | 148 | break; |
31a60e22 BS |
149 | } |
150 | #ifdef DEBUG | |
151 | else | |
f0cbd3ec | 152 | lprint("%s", inet_ntoa(tmp_addr)); |
31a60e22 | 153 | #endif |
f0cbd3ec FB |
154 | } |
155 | } | |
1d43a717 | 156 | fclose(f); |
f0cbd3ec FB |
157 | if (!found) |
158 | return -1; | |
159 | return 0; | |
160 | } | |
161 | ||
162 | #endif | |
163 | ||
379ff53d | 164 | #ifdef _WIN32 |
9634d903 | 165 | static void slirp_cleanup(void) |
379ff53d FB |
166 | { |
167 | WSACleanup(); | |
168 | } | |
169 | #endif | |
170 | ||
062e5527 AL |
171 | static void slirp_state_save(QEMUFile *f, void *opaque); |
172 | static int slirp_state_load(QEMUFile *f, void *opaque, int version_id); | |
173 | ||
511d2b14 | 174 | void slirp_init(int restricted, char *special_ip) |
f0cbd3ec | 175 | { |
512176db | 176 | // debug_init("/tmp/slirp.log", DEBUG_DEFAULT); |
3b46e624 | 177 | |
379ff53d FB |
178 | #ifdef _WIN32 |
179 | { | |
180 | WSADATA Data; | |
181 | WSAStartup(MAKEWORD(2,0), &Data); | |
182 | atexit(slirp_cleanup); | |
183 | } | |
184 | #endif | |
185 | ||
f0cbd3ec | 186 | link_up = 1; |
511d2b14 | 187 | slirp_restrict = restricted; |
f0cbd3ec FB |
188 | |
189 | if_init(); | |
190 | ip_init(); | |
191 | ||
192 | /* Initialise mbufs *after* setting the MTU */ | |
193 | m_init(); | |
194 | ||
195 | /* set default addresses */ | |
f0cbd3ec FB |
196 | inet_aton("127.0.0.1", &loopback_addr); |
197 | ||
198 | if (get_dns_addr(&dns_addr) < 0) { | |
0f8134bf PB |
199 | dns_addr = loopback_addr; |
200 | fprintf (stderr, "Warning: No DNS servers found\n"); | |
f0cbd3ec FB |
201 | } |
202 | ||
a9ba3a85 AL |
203 | if (special_ip) |
204 | slirp_special_ip = special_ip; | |
205 | ||
206 | inet_aton(slirp_special_ip, &special_addr); | |
8dbca8dd | 207 | alias_addr.s_addr = special_addr.s_addr | htonl(CTL_ALIAS); |
f4e15b4b | 208 | getouraddr(); |
062e5527 | 209 | register_savevm("slirp", 0, 1, slirp_state_save, slirp_state_load, NULL); |
f0cbd3ec FB |
210 | } |
211 | ||
212 | #define CONN_CANFSEND(so) (((so)->so_state & (SS_FCANTSENDMORE|SS_ISFCONNECTED)) == SS_ISFCONNECTED) | |
213 | #define CONN_CANFRCV(so) (((so)->so_state & (SS_FCANTRCVMORE|SS_ISFCONNECTED)) == SS_ISFCONNECTED) | |
214 | #define UPD_NFDS(x) if (nfds < (x)) nfds = (x) | |
215 | ||
216 | /* | |
217 | * curtime kept to an accuracy of 1ms | |
218 | */ | |
379ff53d FB |
219 | #ifdef _WIN32 |
220 | static void updtime(void) | |
221 | { | |
222 | struct _timeb tb; | |
223 | ||
224 | _ftime(&tb); | |
225 | curtime = (u_int)tb.time * (u_int)1000; | |
226 | curtime += (u_int)tb.millitm; | |
227 | } | |
228 | #else | |
f0cbd3ec FB |
229 | static void updtime(void) |
230 | { | |
511d2b14 | 231 | gettimeofday(&tt, NULL); |
5fafdf24 | 232 | |
f0cbd3ec FB |
233 | curtime = (u_int)tt.tv_sec * (u_int)1000; |
234 | curtime += (u_int)tt.tv_usec / (u_int)1000; | |
5fafdf24 | 235 | |
f0cbd3ec FB |
236 | if ((tt.tv_usec % 1000) >= 500) |
237 | curtime++; | |
238 | } | |
379ff53d | 239 | #endif |
f0cbd3ec | 240 | |
5fafdf24 | 241 | void slirp_select_fill(int *pnfds, |
f0cbd3ec FB |
242 | fd_set *readfds, fd_set *writefds, fd_set *xfds) |
243 | { | |
244 | struct socket *so, *so_next; | |
245 | struct timeval timeout; | |
246 | int nfds; | |
247 | int tmp_time; | |
248 | ||
249 | /* fail safe */ | |
250 | global_readfds = NULL; | |
251 | global_writefds = NULL; | |
252 | global_xfds = NULL; | |
3b46e624 | 253 | |
f0cbd3ec FB |
254 | nfds = *pnfds; |
255 | /* | |
256 | * First, TCP sockets | |
257 | */ | |
258 | do_slowtimo = 0; | |
259 | if (link_up) { | |
5fafdf24 | 260 | /* |
f0cbd3ec FB |
261 | * *_slowtimo needs calling if there are IP fragments |
262 | * in the fragment queue, or there are TCP connections active | |
263 | */ | |
264 | do_slowtimo = ((tcb.so_next != &tcb) || | |
429d0a3d | 265 | (&ipq.ip_link != ipq.ip_link.next)); |
3b46e624 | 266 | |
f0cbd3ec FB |
267 | for (so = tcb.so_next; so != &tcb; so = so_next) { |
268 | so_next = so->so_next; | |
3b46e624 | 269 | |
f0cbd3ec FB |
270 | /* |
271 | * See if we need a tcp_fasttimo | |
272 | */ | |
273 | if (time_fasttimo == 0 && so->so_tcpcb->t_flags & TF_DELACK) | |
274 | time_fasttimo = curtime; /* Flag when we want a fasttimo */ | |
3b46e624 | 275 | |
f0cbd3ec FB |
276 | /* |
277 | * NOFDREF can include still connecting to local-host, | |
278 | * newly socreated() sockets etc. Don't want to select these. | |
279 | */ | |
280 | if (so->so_state & SS_NOFDREF || so->s == -1) | |
281 | continue; | |
3b46e624 | 282 | |
f0cbd3ec FB |
283 | /* |
284 | * Set for reading sockets which are accepting | |
285 | */ | |
286 | if (so->so_state & SS_FACCEPTCONN) { | |
287 | FD_SET(so->s, readfds); | |
288 | UPD_NFDS(so->s); | |
289 | continue; | |
290 | } | |
3b46e624 | 291 | |
f0cbd3ec FB |
292 | /* |
293 | * Set for writing sockets which are connecting | |
294 | */ | |
295 | if (so->so_state & SS_ISFCONNECTING) { | |
296 | FD_SET(so->s, writefds); | |
297 | UPD_NFDS(so->s); | |
298 | continue; | |
299 | } | |
3b46e624 | 300 | |
f0cbd3ec FB |
301 | /* |
302 | * Set for writing if we are connected, can send more, and | |
303 | * we have something to send | |
304 | */ | |
305 | if (CONN_CANFSEND(so) && so->so_rcv.sb_cc) { | |
306 | FD_SET(so->s, writefds); | |
307 | UPD_NFDS(so->s); | |
308 | } | |
3b46e624 | 309 | |
f0cbd3ec FB |
310 | /* |
311 | * Set for reading (and urgent data) if we are connected, can | |
312 | * receive more, and we have room for it XXX /2 ? | |
313 | */ | |
314 | if (CONN_CANFRCV(so) && (so->so_snd.sb_cc < (so->so_snd.sb_datalen/2))) { | |
315 | FD_SET(so->s, readfds); | |
316 | FD_SET(so->s, xfds); | |
317 | UPD_NFDS(so->s); | |
318 | } | |
319 | } | |
3b46e624 | 320 | |
f0cbd3ec FB |
321 | /* |
322 | * UDP sockets | |
323 | */ | |
324 | for (so = udb.so_next; so != &udb; so = so_next) { | |
325 | so_next = so->so_next; | |
3b46e624 | 326 | |
f0cbd3ec FB |
327 | /* |
328 | * See if it's timed out | |
329 | */ | |
330 | if (so->so_expire) { | |
331 | if (so->so_expire <= curtime) { | |
332 | udp_detach(so); | |
333 | continue; | |
334 | } else | |
335 | do_slowtimo = 1; /* Let socket expire */ | |
336 | } | |
3b46e624 | 337 | |
f0cbd3ec FB |
338 | /* |
339 | * When UDP packets are received from over the | |
340 | * link, they're sendto()'d straight away, so | |
341 | * no need for setting for writing | |
342 | * Limit the number of packets queued by this session | |
343 | * to 4. Note that even though we try and limit this | |
344 | * to 4 packets, the session could have more queued | |
345 | * if the packets needed to be fragmented | |
346 | * (XXX <= 4 ?) | |
347 | */ | |
348 | if ((so->so_state & SS_ISFCONNECTED) && so->so_queued <= 4) { | |
349 | FD_SET(so->s, readfds); | |
350 | UPD_NFDS(so->s); | |
351 | } | |
352 | } | |
353 | } | |
5fafdf24 | 354 | |
f0cbd3ec FB |
355 | /* |
356 | * Setup timeout to use minimum CPU usage, especially when idle | |
357 | */ | |
5fafdf24 TS |
358 | |
359 | /* | |
f0cbd3ec FB |
360 | * First, see the timeout needed by *timo |
361 | */ | |
362 | timeout.tv_sec = 0; | |
363 | timeout.tv_usec = -1; | |
364 | /* | |
365 | * If a slowtimo is needed, set timeout to 500ms from the last | |
366 | * slow timeout. If a fast timeout is needed, set timeout within | |
367 | * 200ms of when it was requested. | |
368 | */ | |
369 | if (do_slowtimo) { | |
370 | /* XXX + 10000 because some select()'s aren't that accurate */ | |
371 | timeout.tv_usec = ((500 - (curtime - last_slowtimo)) * 1000) + 10000; | |
372 | if (timeout.tv_usec < 0) | |
373 | timeout.tv_usec = 0; | |
374 | else if (timeout.tv_usec > 510000) | |
375 | timeout.tv_usec = 510000; | |
3b46e624 | 376 | |
f0cbd3ec FB |
377 | /* Can only fasttimo if we also slowtimo */ |
378 | if (time_fasttimo) { | |
379 | tmp_time = (200 - (curtime - time_fasttimo)) * 1000; | |
380 | if (tmp_time < 0) | |
381 | tmp_time = 0; | |
3b46e624 | 382 | |
f0cbd3ec FB |
383 | /* Choose the smallest of the 2 */ |
384 | if (tmp_time < timeout.tv_usec) | |
385 | timeout.tv_usec = (u_int)tmp_time; | |
386 | } | |
387 | } | |
388 | *pnfds = nfds; | |
5fafdf24 | 389 | } |
f0cbd3ec FB |
390 | |
391 | void slirp_select_poll(fd_set *readfds, fd_set *writefds, fd_set *xfds) | |
392 | { | |
393 | struct socket *so, *so_next; | |
394 | int ret; | |
395 | ||
396 | global_readfds = readfds; | |
397 | global_writefds = writefds; | |
398 | global_xfds = xfds; | |
399 | ||
400 | /* Update time */ | |
401 | updtime(); | |
5fafdf24 | 402 | |
f0cbd3ec | 403 | /* |
5fafdf24 | 404 | * See if anything has timed out |
f0cbd3ec FB |
405 | */ |
406 | if (link_up) { | |
df5f8956 | 407 | if (time_fasttimo && ((curtime - time_fasttimo) >= 2)) { |
f0cbd3ec FB |
408 | tcp_fasttimo(); |
409 | time_fasttimo = 0; | |
410 | } | |
411 | if (do_slowtimo && ((curtime - last_slowtimo) >= 499)) { | |
412 | ip_slowtimo(); | |
413 | tcp_slowtimo(); | |
414 | last_slowtimo = curtime; | |
415 | } | |
416 | } | |
5fafdf24 | 417 | |
f0cbd3ec FB |
418 | /* |
419 | * Check sockets | |
420 | */ | |
421 | if (link_up) { | |
422 | /* | |
423 | * Check TCP sockets | |
424 | */ | |
425 | for (so = tcb.so_next; so != &tcb; so = so_next) { | |
426 | so_next = so->so_next; | |
3b46e624 | 427 | |
f0cbd3ec FB |
428 | /* |
429 | * FD_ISSET is meaningless on these sockets | |
430 | * (and they can crash the program) | |
431 | */ | |
432 | if (so->so_state & SS_NOFDREF || so->s == -1) | |
433 | continue; | |
3b46e624 | 434 | |
f0cbd3ec FB |
435 | /* |
436 | * Check for URG data | |
437 | * This will soread as well, so no need to | |
438 | * test for readfds below if this succeeds | |
439 | */ | |
440 | if (FD_ISSET(so->s, xfds)) | |
441 | sorecvoob(so); | |
442 | /* | |
443 | * Check sockets for reading | |
444 | */ | |
445 | else if (FD_ISSET(so->s, readfds)) { | |
446 | /* | |
447 | * Check for incoming connections | |
448 | */ | |
449 | if (so->so_state & SS_FACCEPTCONN) { | |
450 | tcp_connect(so); | |
451 | continue; | |
452 | } /* else */ | |
453 | ret = soread(so); | |
3b46e624 | 454 | |
f0cbd3ec FB |
455 | /* Output it if we read something */ |
456 | if (ret > 0) | |
457 | tcp_output(sototcpcb(so)); | |
458 | } | |
3b46e624 | 459 | |
f0cbd3ec FB |
460 | /* |
461 | * Check sockets for writing | |
462 | */ | |
463 | if (FD_ISSET(so->s, writefds)) { | |
464 | /* | |
465 | * Check for non-blocking, still-connecting sockets | |
466 | */ | |
467 | if (so->so_state & SS_ISFCONNECTING) { | |
468 | /* Connected */ | |
469 | so->so_state &= ~SS_ISFCONNECTING; | |
3b46e624 | 470 | |
02d2c54c | 471 | ret = send(so->s, &ret, 0, 0); |
f0cbd3ec FB |
472 | if (ret < 0) { |
473 | /* XXXXX Must fix, zero bytes is a NOP */ | |
474 | if (errno == EAGAIN || errno == EWOULDBLOCK || | |
475 | errno == EINPROGRESS || errno == ENOTCONN) | |
476 | continue; | |
3b46e624 | 477 | |
f0cbd3ec FB |
478 | /* else failed */ |
479 | so->so_state = SS_NOFDREF; | |
480 | } | |
481 | /* else so->so_state &= ~SS_ISFCONNECTING; */ | |
3b46e624 | 482 | |
f0cbd3ec FB |
483 | /* |
484 | * Continue tcp_input | |
485 | */ | |
486 | tcp_input((struct mbuf *)NULL, sizeof(struct ip), so); | |
487 | /* continue; */ | |
488 | } else | |
489 | ret = sowrite(so); | |
490 | /* | |
5fafdf24 | 491 | * XXXXX If we wrote something (a lot), there |
f0cbd3ec FB |
492 | * could be a need for a window update. |
493 | * In the worst case, the remote will send | |
494 | * a window probe to get things going again | |
495 | */ | |
496 | } | |
3b46e624 | 497 | |
f0cbd3ec FB |
498 | /* |
499 | * Probe a still-connecting, non-blocking socket | |
500 | * to check if it's still alive | |
501 | */ | |
502 | #ifdef PROBE_CONN | |
503 | if (so->so_state & SS_ISFCONNECTING) { | |
02d2c54c | 504 | ret = recv(so->s, (char *)&ret, 0,0); |
3b46e624 | 505 | |
f0cbd3ec FB |
506 | if (ret < 0) { |
507 | /* XXX */ | |
508 | if (errno == EAGAIN || errno == EWOULDBLOCK || | |
509 | errno == EINPROGRESS || errno == ENOTCONN) | |
510 | continue; /* Still connecting, continue */ | |
3b46e624 | 511 | |
f0cbd3ec FB |
512 | /* else failed */ |
513 | so->so_state = SS_NOFDREF; | |
3b46e624 | 514 | |
f0cbd3ec FB |
515 | /* tcp_input will take care of it */ |
516 | } else { | |
02d2c54c | 517 | ret = send(so->s, &ret, 0,0); |
f0cbd3ec FB |
518 | if (ret < 0) { |
519 | /* XXX */ | |
520 | if (errno == EAGAIN || errno == EWOULDBLOCK || | |
521 | errno == EINPROGRESS || errno == ENOTCONN) | |
522 | continue; | |
523 | /* else failed */ | |
524 | so->so_state = SS_NOFDREF; | |
525 | } else | |
526 | so->so_state &= ~SS_ISFCONNECTING; | |
3b46e624 | 527 | |
f0cbd3ec FB |
528 | } |
529 | tcp_input((struct mbuf *)NULL, sizeof(struct ip),so); | |
530 | } /* SS_ISFCONNECTING */ | |
531 | #endif | |
532 | } | |
3b46e624 | 533 | |
f0cbd3ec FB |
534 | /* |
535 | * Now UDP sockets. | |
536 | * Incoming packets are sent straight away, they're not buffered. | |
537 | * Incoming UDP data isn't buffered either. | |
538 | */ | |
539 | for (so = udb.so_next; so != &udb; so = so_next) { | |
540 | so_next = so->so_next; | |
3b46e624 | 541 | |
f0cbd3ec FB |
542 | if (so->s != -1 && FD_ISSET(so->s, readfds)) { |
543 | sorecvfrom(so); | |
544 | } | |
545 | } | |
546 | } | |
5fafdf24 | 547 | |
f0cbd3ec FB |
548 | /* |
549 | * See if we can start outputting | |
550 | */ | |
551 | if (if_queued && link_up) | |
552 | if_start(); | |
02d2c54c FB |
553 | |
554 | /* clear global file descriptor sets. | |
555 | * these reside on the stack in vl.c | |
556 | * so they're unusable if we're not in | |
557 | * slirp_select_fill or slirp_select_poll. | |
558 | */ | |
559 | global_readfds = NULL; | |
560 | global_writefds = NULL; | |
561 | global_xfds = NULL; | |
f0cbd3ec FB |
562 | } |
563 | ||
564 | #define ETH_ALEN 6 | |
565 | #define ETH_HLEN 14 | |
566 | ||
567 | #define ETH_P_IP 0x0800 /* Internet Protocol packet */ | |
568 | #define ETH_P_ARP 0x0806 /* Address Resolution packet */ | |
569 | ||
570 | #define ARPOP_REQUEST 1 /* ARP request */ | |
571 | #define ARPOP_REPLY 2 /* ARP reply */ | |
572 | ||
5fafdf24 | 573 | struct ethhdr |
f0cbd3ec FB |
574 | { |
575 | unsigned char h_dest[ETH_ALEN]; /* destination eth addr */ | |
576 | unsigned char h_source[ETH_ALEN]; /* source ether addr */ | |
577 | unsigned short h_proto; /* packet type ID field */ | |
578 | }; | |
579 | ||
580 | struct arphdr | |
581 | { | |
582 | unsigned short ar_hrd; /* format of hardware address */ | |
583 | unsigned short ar_pro; /* format of protocol address */ | |
584 | unsigned char ar_hln; /* length of hardware address */ | |
585 | unsigned char ar_pln; /* length of protocol address */ | |
586 | unsigned short ar_op; /* ARP opcode (command) */ | |
587 | ||
588 | /* | |
589 | * Ethernet looks like this : This bit is variable sized however... | |
590 | */ | |
591 | unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */ | |
592 | unsigned char ar_sip[4]; /* sender IP address */ | |
593 | unsigned char ar_tha[ETH_ALEN]; /* target hardware address */ | |
594 | unsigned char ar_tip[4]; /* target IP address */ | |
595 | }; | |
596 | ||
8fcd3692 | 597 | static void arp_input(const uint8_t *pkt, int pkt_len) |
f0cbd3ec FB |
598 | { |
599 | struct ethhdr *eh = (struct ethhdr *)pkt; | |
600 | struct arphdr *ah = (struct arphdr *)(pkt + ETH_HLEN); | |
601 | uint8_t arp_reply[ETH_HLEN + sizeof(struct arphdr)]; | |
602 | struct ethhdr *reh = (struct ethhdr *)arp_reply; | |
603 | struct arphdr *rah = (struct arphdr *)(arp_reply + ETH_HLEN); | |
604 | int ar_op; | |
a3d4af03 | 605 | struct ex_list *ex_ptr; |
f0cbd3ec FB |
606 | |
607 | ar_op = ntohs(ah->ar_op); | |
608 | switch(ar_op) { | |
609 | case ARPOP_REQUEST: | |
a3d4af03 | 610 | if (!memcmp(ah->ar_tip, &special_addr, 3)) { |
5fafdf24 | 611 | if (ah->ar_tip[3] == CTL_DNS || ah->ar_tip[3] == CTL_ALIAS) |
a3d4af03 FB |
612 | goto arp_ok; |
613 | for (ex_ptr = exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next) { | |
614 | if (ex_ptr->ex_addr == ah->ar_tip[3]) | |
615 | goto arp_ok; | |
616 | } | |
617 | return; | |
618 | arp_ok: | |
f0cbd3ec FB |
619 | /* XXX: make an ARP request to have the client address */ |
620 | memcpy(client_ethaddr, eh->h_source, ETH_ALEN); | |
621 | ||
622 | /* ARP request for alias/dns mac address */ | |
623 | memcpy(reh->h_dest, pkt + ETH_ALEN, ETH_ALEN); | |
624 | memcpy(reh->h_source, special_ethaddr, ETH_ALEN - 1); | |
625 | reh->h_source[5] = ah->ar_tip[3]; | |
626 | reh->h_proto = htons(ETH_P_ARP); | |
627 | ||
628 | rah->ar_hrd = htons(1); | |
629 | rah->ar_pro = htons(ETH_P_IP); | |
630 | rah->ar_hln = ETH_ALEN; | |
631 | rah->ar_pln = 4; | |
632 | rah->ar_op = htons(ARPOP_REPLY); | |
633 | memcpy(rah->ar_sha, reh->h_source, ETH_ALEN); | |
634 | memcpy(rah->ar_sip, ah->ar_tip, 4); | |
635 | memcpy(rah->ar_tha, ah->ar_sha, ETH_ALEN); | |
636 | memcpy(rah->ar_tip, ah->ar_sip, 4); | |
637 | slirp_output(arp_reply, sizeof(arp_reply)); | |
638 | } | |
639 | break; | |
de806f07 FB |
640 | case ARPOP_REPLY: |
641 | /* reply to request of client mac address ? */ | |
642 | if (!memcmp(client_ethaddr, zero_ethaddr, ETH_ALEN) && | |
643 | !memcmp(ah->ar_sip, &client_ipaddr.s_addr, 4)) { | |
644 | memcpy(client_ethaddr, ah->ar_sha, ETH_ALEN); | |
645 | } | |
646 | break; | |
f0cbd3ec FB |
647 | default: |
648 | break; | |
649 | } | |
650 | } | |
651 | ||
652 | void slirp_input(const uint8_t *pkt, int pkt_len) | |
653 | { | |
654 | struct mbuf *m; | |
655 | int proto; | |
656 | ||
657 | if (pkt_len < ETH_HLEN) | |
658 | return; | |
3b46e624 | 659 | |
f0cbd3ec FB |
660 | proto = ntohs(*(uint16_t *)(pkt + 12)); |
661 | switch(proto) { | |
662 | case ETH_P_ARP: | |
663 | arp_input(pkt, pkt_len); | |
664 | break; | |
665 | case ETH_P_IP: | |
666 | m = m_get(); | |
667 | if (!m) | |
668 | return; | |
38f3e7c2 | 669 | /* Note: we add to align the IP header */ |
e8e880a7 AJ |
670 | if (M_FREEROOM(m) < pkt_len + 2) { |
671 | m_inc(m, pkt_len + 2); | |
672 | } | |
38f3e7c2 FB |
673 | m->m_len = pkt_len + 2; |
674 | memcpy(m->m_data + 2, pkt, pkt_len); | |
f0cbd3ec | 675 | |
38f3e7c2 FB |
676 | m->m_data += 2 + ETH_HLEN; |
677 | m->m_len -= 2 + ETH_HLEN; | |
f0cbd3ec FB |
678 | |
679 | ip_input(m); | |
680 | break; | |
681 | default: | |
682 | break; | |
683 | } | |
684 | } | |
685 | ||
686 | /* output the IP packet to the ethernet device */ | |
687 | void if_encap(const uint8_t *ip_data, int ip_data_len) | |
688 | { | |
689 | uint8_t buf[1600]; | |
690 | struct ethhdr *eh = (struct ethhdr *)buf; | |
691 | ||
692 | if (ip_data_len + ETH_HLEN > sizeof(buf)) | |
693 | return; | |
de806f07 FB |
694 | |
695 | if (!memcmp(client_ethaddr, zero_ethaddr, ETH_ALEN)) { | |
696 | uint8_t arp_req[ETH_HLEN + sizeof(struct arphdr)]; | |
697 | struct ethhdr *reh = (struct ethhdr *)arp_req; | |
698 | struct arphdr *rah = (struct arphdr *)(arp_req + ETH_HLEN); | |
699 | const struct ip *iph = (const struct ip *)ip_data; | |
700 | ||
701 | /* If the client addr is not known, there is no point in | |
702 | sending the packet to it. Normally the sender should have | |
703 | done an ARP request to get its MAC address. Here we do it | |
704 | in place of sending the packet and we hope that the sender | |
705 | will retry sending its packet. */ | |
706 | memset(reh->h_dest, 0xff, ETH_ALEN); | |
707 | memcpy(reh->h_source, special_ethaddr, ETH_ALEN - 1); | |
708 | reh->h_source[5] = CTL_ALIAS; | |
709 | reh->h_proto = htons(ETH_P_ARP); | |
710 | rah->ar_hrd = htons(1); | |
711 | rah->ar_pro = htons(ETH_P_IP); | |
712 | rah->ar_hln = ETH_ALEN; | |
713 | rah->ar_pln = 4; | |
714 | rah->ar_op = htons(ARPOP_REQUEST); | |
715 | /* source hw addr */ | |
716 | memcpy(rah->ar_sha, special_ethaddr, ETH_ALEN - 1); | |
717 | rah->ar_sha[5] = CTL_ALIAS; | |
718 | /* source IP */ | |
719 | memcpy(rah->ar_sip, &alias_addr, 4); | |
720 | /* target hw addr (none) */ | |
721 | memset(rah->ar_tha, 0, ETH_ALEN); | |
722 | /* target IP */ | |
723 | memcpy(rah->ar_tip, &iph->ip_dst, 4); | |
724 | client_ipaddr = iph->ip_dst; | |
725 | slirp_output(arp_req, sizeof(arp_req)); | |
726 | } else { | |
727 | memcpy(eh->h_dest, client_ethaddr, ETH_ALEN); | |
728 | memcpy(eh->h_source, special_ethaddr, ETH_ALEN - 1); | |
729 | /* XXX: not correct */ | |
730 | eh->h_source[5] = CTL_ALIAS; | |
731 | eh->h_proto = htons(ETH_P_IP); | |
732 | memcpy(buf + sizeof(struct ethhdr), ip_data, ip_data_len); | |
733 | slirp_output(buf, ip_data_len + ETH_HLEN); | |
734 | } | |
f0cbd3ec | 735 | } |
9bf05444 | 736 | |
5fafdf24 | 737 | int slirp_redir(int is_udp, int host_port, |
9bf05444 FB |
738 | struct in_addr guest_addr, int guest_port) |
739 | { | |
740 | if (is_udp) { | |
5fafdf24 | 741 | if (!udp_listen(htons(host_port), guest_addr.s_addr, |
9bf05444 FB |
742 | htons(guest_port), 0)) |
743 | return -1; | |
744 | } else { | |
5fafdf24 | 745 | if (!solisten(htons(host_port), guest_addr.s_addr, |
9bf05444 FB |
746 | htons(guest_port), 0)) |
747 | return -1; | |
748 | } | |
749 | return 0; | |
750 | } | |
a3d4af03 | 751 | |
e1c5a2b3 | 752 | int slirp_add_exec(int do_pty, const void *args, int addr_low_byte, |
a3d4af03 FB |
753 | int guest_port) |
754 | { | |
5fafdf24 | 755 | return add_exec(&exec_list, do_pty, (char *)args, |
a3d4af03 FB |
756 | addr_low_byte, htons(guest_port)); |
757 | } | |
e1c5a2b3 AL |
758 | |
759 | ssize_t slirp_send(struct socket *so, const void *buf, size_t len, int flags) | |
760 | { | |
761 | if (so->s == -1 && so->extra) { | |
762 | qemu_chr_write(so->extra, buf, len); | |
763 | return len; | |
764 | } | |
765 | ||
766 | return send(so->s, buf, len, flags); | |
767 | } | |
768 | ||
769 | static struct socket *slirp_find_ctl_socket(int addr_low_byte, int guest_port) | |
770 | { | |
771 | struct socket *so; | |
772 | ||
773 | for (so = tcb.so_next; so != &tcb; so = so->so_next) { | |
774 | if ((so->so_faddr.s_addr & htonl(0xffffff00)) == | |
775 | special_addr.s_addr | |
776 | && (ntohl(so->so_faddr.s_addr) & 0xff) == | |
777 | addr_low_byte | |
778 | && htons(so->so_fport) == guest_port) | |
779 | return so; | |
780 | } | |
781 | ||
782 | return NULL; | |
783 | } | |
784 | ||
785 | size_t slirp_socket_can_recv(int addr_low_byte, int guest_port) | |
786 | { | |
787 | struct iovec iov[2]; | |
788 | struct socket *so; | |
789 | ||
790 | if (!link_up) | |
791 | return 0; | |
792 | ||
793 | so = slirp_find_ctl_socket(addr_low_byte, guest_port); | |
794 | ||
795 | if (!so || so->so_state & SS_NOFDREF) | |
796 | return 0; | |
797 | ||
798 | if (!CONN_CANFRCV(so) || so->so_snd.sb_cc >= (so->so_snd.sb_datalen/2)) | |
799 | return 0; | |
800 | ||
801 | return sopreprbuf(so, iov, NULL); | |
802 | } | |
803 | ||
804 | void slirp_socket_recv(int addr_low_byte, int guest_port, const uint8_t *buf, | |
805 | int size) | |
806 | { | |
807 | int ret; | |
808 | struct socket *so = slirp_find_ctl_socket(addr_low_byte, guest_port); | |
809 | ||
810 | if (!so) | |
811 | return; | |
812 | ||
0580ac91 | 813 | ret = soreadbuf(so, (const char *)buf, size); |
e1c5a2b3 AL |
814 | |
815 | if (ret > 0) | |
816 | tcp_output(sototcpcb(so)); | |
817 | } | |
062e5527 AL |
818 | |
819 | static void slirp_tcp_save(QEMUFile *f, struct tcpcb *tp) | |
820 | { | |
821 | int i; | |
822 | ||
823 | qemu_put_sbe16(f, tp->t_state); | |
824 | for (i = 0; i < TCPT_NTIMERS; i++) | |
825 | qemu_put_sbe16(f, tp->t_timer[i]); | |
826 | qemu_put_sbe16(f, tp->t_rxtshift); | |
827 | qemu_put_sbe16(f, tp->t_rxtcur); | |
828 | qemu_put_sbe16(f, tp->t_dupacks); | |
829 | qemu_put_be16(f, tp->t_maxseg); | |
830 | qemu_put_sbyte(f, tp->t_force); | |
831 | qemu_put_be16(f, tp->t_flags); | |
832 | qemu_put_be32(f, tp->snd_una); | |
833 | qemu_put_be32(f, tp->snd_nxt); | |
834 | qemu_put_be32(f, tp->snd_up); | |
835 | qemu_put_be32(f, tp->snd_wl1); | |
836 | qemu_put_be32(f, tp->snd_wl2); | |
837 | qemu_put_be32(f, tp->iss); | |
838 | qemu_put_be32(f, tp->snd_wnd); | |
839 | qemu_put_be32(f, tp->rcv_wnd); | |
840 | qemu_put_be32(f, tp->rcv_nxt); | |
841 | qemu_put_be32(f, tp->rcv_up); | |
842 | qemu_put_be32(f, tp->irs); | |
843 | qemu_put_be32(f, tp->rcv_adv); | |
844 | qemu_put_be32(f, tp->snd_max); | |
845 | qemu_put_be32(f, tp->snd_cwnd); | |
846 | qemu_put_be32(f, tp->snd_ssthresh); | |
847 | qemu_put_sbe16(f, tp->t_idle); | |
848 | qemu_put_sbe16(f, tp->t_rtt); | |
849 | qemu_put_be32(f, tp->t_rtseq); | |
850 | qemu_put_sbe16(f, tp->t_srtt); | |
851 | qemu_put_sbe16(f, tp->t_rttvar); | |
852 | qemu_put_be16(f, tp->t_rttmin); | |
853 | qemu_put_be32(f, tp->max_sndwnd); | |
854 | qemu_put_byte(f, tp->t_oobflags); | |
855 | qemu_put_byte(f, tp->t_iobc); | |
856 | qemu_put_sbe16(f, tp->t_softerror); | |
857 | qemu_put_byte(f, tp->snd_scale); | |
858 | qemu_put_byte(f, tp->rcv_scale); | |
859 | qemu_put_byte(f, tp->request_r_scale); | |
860 | qemu_put_byte(f, tp->requested_s_scale); | |
861 | qemu_put_be32(f, tp->ts_recent); | |
862 | qemu_put_be32(f, tp->ts_recent_age); | |
863 | qemu_put_be32(f, tp->last_ack_sent); | |
864 | } | |
865 | ||
866 | static void slirp_sbuf_save(QEMUFile *f, struct sbuf *sbuf) | |
867 | { | |
868 | uint32_t off; | |
869 | ||
870 | qemu_put_be32(f, sbuf->sb_cc); | |
871 | qemu_put_be32(f, sbuf->sb_datalen); | |
872 | off = (uint32_t)(sbuf->sb_wptr - sbuf->sb_data); | |
873 | qemu_put_sbe32(f, off); | |
874 | off = (uint32_t)(sbuf->sb_rptr - sbuf->sb_data); | |
875 | qemu_put_sbe32(f, off); | |
876 | qemu_put_buffer(f, (unsigned char*)sbuf->sb_data, sbuf->sb_datalen); | |
877 | } | |
878 | ||
879 | static void slirp_socket_save(QEMUFile *f, struct socket *so) | |
880 | { | |
881 | qemu_put_be32(f, so->so_urgc); | |
882 | qemu_put_be32(f, so->so_faddr.s_addr); | |
883 | qemu_put_be32(f, so->so_laddr.s_addr); | |
884 | qemu_put_be16(f, so->so_fport); | |
885 | qemu_put_be16(f, so->so_lport); | |
886 | qemu_put_byte(f, so->so_iptos); | |
887 | qemu_put_byte(f, so->so_emu); | |
888 | qemu_put_byte(f, so->so_type); | |
889 | qemu_put_be32(f, so->so_state); | |
890 | slirp_sbuf_save(f, &so->so_rcv); | |
891 | slirp_sbuf_save(f, &so->so_snd); | |
892 | slirp_tcp_save(f, so->so_tcpcb); | |
893 | } | |
894 | ||
895 | static void slirp_state_save(QEMUFile *f, void *opaque) | |
896 | { | |
897 | struct ex_list *ex_ptr; | |
898 | ||
899 | for (ex_ptr = exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next) | |
900 | if (ex_ptr->ex_pty == 3) { | |
901 | struct socket *so; | |
902 | so = slirp_find_ctl_socket(ex_ptr->ex_addr, ntohs(ex_ptr->ex_fport)); | |
903 | if (!so) | |
904 | continue; | |
905 | ||
906 | qemu_put_byte(f, 42); | |
907 | slirp_socket_save(f, so); | |
908 | } | |
909 | qemu_put_byte(f, 0); | |
910 | } | |
911 | ||
912 | static void slirp_tcp_load(QEMUFile *f, struct tcpcb *tp) | |
913 | { | |
914 | int i; | |
915 | ||
916 | tp->t_state = qemu_get_sbe16(f); | |
917 | for (i = 0; i < TCPT_NTIMERS; i++) | |
918 | tp->t_timer[i] = qemu_get_sbe16(f); | |
919 | tp->t_rxtshift = qemu_get_sbe16(f); | |
920 | tp->t_rxtcur = qemu_get_sbe16(f); | |
921 | tp->t_dupacks = qemu_get_sbe16(f); | |
922 | tp->t_maxseg = qemu_get_be16(f); | |
923 | tp->t_force = qemu_get_sbyte(f); | |
924 | tp->t_flags = qemu_get_be16(f); | |
925 | tp->snd_una = qemu_get_be32(f); | |
926 | tp->snd_nxt = qemu_get_be32(f); | |
927 | tp->snd_up = qemu_get_be32(f); | |
928 | tp->snd_wl1 = qemu_get_be32(f); | |
929 | tp->snd_wl2 = qemu_get_be32(f); | |
930 | tp->iss = qemu_get_be32(f); | |
931 | tp->snd_wnd = qemu_get_be32(f); | |
932 | tp->rcv_wnd = qemu_get_be32(f); | |
933 | tp->rcv_nxt = qemu_get_be32(f); | |
934 | tp->rcv_up = qemu_get_be32(f); | |
935 | tp->irs = qemu_get_be32(f); | |
936 | tp->rcv_adv = qemu_get_be32(f); | |
937 | tp->snd_max = qemu_get_be32(f); | |
938 | tp->snd_cwnd = qemu_get_be32(f); | |
939 | tp->snd_ssthresh = qemu_get_be32(f); | |
940 | tp->t_idle = qemu_get_sbe16(f); | |
941 | tp->t_rtt = qemu_get_sbe16(f); | |
942 | tp->t_rtseq = qemu_get_be32(f); | |
943 | tp->t_srtt = qemu_get_sbe16(f); | |
944 | tp->t_rttvar = qemu_get_sbe16(f); | |
945 | tp->t_rttmin = qemu_get_be16(f); | |
946 | tp->max_sndwnd = qemu_get_be32(f); | |
947 | tp->t_oobflags = qemu_get_byte(f); | |
948 | tp->t_iobc = qemu_get_byte(f); | |
949 | tp->t_softerror = qemu_get_sbe16(f); | |
950 | tp->snd_scale = qemu_get_byte(f); | |
951 | tp->rcv_scale = qemu_get_byte(f); | |
952 | tp->request_r_scale = qemu_get_byte(f); | |
953 | tp->requested_s_scale = qemu_get_byte(f); | |
954 | tp->ts_recent = qemu_get_be32(f); | |
955 | tp->ts_recent_age = qemu_get_be32(f); | |
956 | tp->last_ack_sent = qemu_get_be32(f); | |
957 | tcp_template(tp); | |
958 | } | |
959 | ||
960 | static int slirp_sbuf_load(QEMUFile *f, struct sbuf *sbuf) | |
961 | { | |
962 | uint32_t off, sb_cc, sb_datalen; | |
963 | ||
964 | sb_cc = qemu_get_be32(f); | |
965 | sb_datalen = qemu_get_be32(f); | |
966 | ||
967 | sbreserve(sbuf, sb_datalen); | |
968 | ||
969 | if (sbuf->sb_datalen != sb_datalen) | |
970 | return -ENOMEM; | |
971 | ||
972 | sbuf->sb_cc = sb_cc; | |
973 | ||
974 | off = qemu_get_sbe32(f); | |
975 | sbuf->sb_wptr = sbuf->sb_data + off; | |
976 | off = qemu_get_sbe32(f); | |
977 | sbuf->sb_rptr = sbuf->sb_data + off; | |
978 | qemu_get_buffer(f, (unsigned char*)sbuf->sb_data, sbuf->sb_datalen); | |
979 | ||
980 | return 0; | |
981 | } | |
982 | ||
983 | static int slirp_socket_load(QEMUFile *f, struct socket *so) | |
984 | { | |
985 | if (tcp_attach(so) < 0) | |
986 | return -ENOMEM; | |
987 | ||
988 | so->so_urgc = qemu_get_be32(f); | |
989 | so->so_faddr.s_addr = qemu_get_be32(f); | |
990 | so->so_laddr.s_addr = qemu_get_be32(f); | |
991 | so->so_fport = qemu_get_be16(f); | |
992 | so->so_lport = qemu_get_be16(f); | |
993 | so->so_iptos = qemu_get_byte(f); | |
994 | so->so_emu = qemu_get_byte(f); | |
995 | so->so_type = qemu_get_byte(f); | |
996 | so->so_state = qemu_get_be32(f); | |
997 | if (slirp_sbuf_load(f, &so->so_rcv) < 0) | |
998 | return -ENOMEM; | |
999 | if (slirp_sbuf_load(f, &so->so_snd) < 0) | |
1000 | return -ENOMEM; | |
1001 | slirp_tcp_load(f, so->so_tcpcb); | |
1002 | ||
1003 | return 0; | |
1004 | } | |
1005 | ||
1006 | static int slirp_state_load(QEMUFile *f, void *opaque, int version_id) | |
1007 | { | |
1008 | struct ex_list *ex_ptr; | |
1009 | int r; | |
1010 | ||
1011 | while ((r = qemu_get_byte(f))) { | |
1012 | int ret; | |
1013 | struct socket *so = socreate(); | |
1014 | ||
1015 | if (!so) | |
1016 | return -ENOMEM; | |
1017 | ||
1018 | ret = slirp_socket_load(f, so); | |
1019 | ||
1020 | if (ret < 0) | |
1021 | return ret; | |
1022 | ||
1023 | if ((so->so_faddr.s_addr & htonl(0xffffff00)) != special_addr.s_addr) | |
1024 | return -EINVAL; | |
1025 | ||
1026 | for (ex_ptr = exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next) | |
1027 | if (ex_ptr->ex_pty == 3 && | |
1028 | (ntohl(so->so_faddr.s_addr) & 0xff) == ex_ptr->ex_addr && | |
1029 | so->so_fport == ex_ptr->ex_fport) | |
1030 | break; | |
1031 | ||
1032 | if (!ex_ptr) | |
1033 | return -EINVAL; | |
1034 | ||
0580ac91 | 1035 | so->extra = (void *)ex_ptr->ex_exec; |
062e5527 AL |
1036 | } |
1037 | ||
1038 | return 0; | |
1039 | } |