]>
Commit | Line | Data |
---|---|---|
f0cbd3ec FB |
1 | #include "slirp.h" |
2 | ||
3 | /* host address */ | |
4 | struct in_addr our_addr; | |
5 | /* host dns address */ | |
6 | struct in_addr dns_addr; | |
7 | /* host loopback address */ | |
8 | struct in_addr loopback_addr; | |
9 | ||
10 | /* address for slirp virtual addresses */ | |
11 | struct in_addr special_addr; | |
8dbca8dd FB |
12 | /* virtual address alias for host */ |
13 | struct in_addr alias_addr; | |
f0cbd3ec FB |
14 | |
15 | const uint8_t special_ethaddr[6] = { | |
16 | 0x52, 0x54, 0x00, 0x12, 0x35, 0x00 | |
17 | }; | |
18 | ||
19 | uint8_t client_ethaddr[6]; | |
20 | ||
21 | int do_slowtimo; | |
22 | int link_up; | |
23 | struct timeval tt; | |
24 | FILE *lfd; | |
a3d4af03 | 25 | struct ex_list *exec_list; |
f0cbd3ec FB |
26 | |
27 | /* XXX: suppress those select globals */ | |
28 | fd_set *global_readfds, *global_writefds, *global_xfds; | |
29 | ||
3f423c9c | 30 | char slirp_hostname[33]; |
115defd1 | 31 | |
f0cbd3ec FB |
32 | #ifdef _WIN32 |
33 | ||
34 | static int get_dns_addr(struct in_addr *pdns_addr) | |
35 | { | |
379ff53d FB |
36 | FIXED_INFO *FixedInfo=NULL; |
37 | ULONG BufLen; | |
38 | DWORD ret; | |
39 | IP_ADDR_STRING *pIPAddr; | |
40 | struct in_addr tmp_addr; | |
41 | ||
42 | FixedInfo = (FIXED_INFO *)GlobalAlloc(GPTR, sizeof(FIXED_INFO)); | |
43 | BufLen = sizeof(FIXED_INFO); | |
44 | ||
45 | if (ERROR_BUFFER_OVERFLOW == GetNetworkParams(FixedInfo, &BufLen)) { | |
46 | if (FixedInfo) { | |
47 | GlobalFree(FixedInfo); | |
48 | FixedInfo = NULL; | |
49 | } | |
50 | FixedInfo = GlobalAlloc(GPTR, BufLen); | |
51 | } | |
52 | ||
53 | if ((ret = GetNetworkParams(FixedInfo, &BufLen)) != ERROR_SUCCESS) { | |
54 | printf("GetNetworkParams failed. ret = %08x\n", (u_int)ret ); | |
55 | if (FixedInfo) { | |
56 | GlobalFree(FixedInfo); | |
57 | FixedInfo = NULL; | |
58 | } | |
59 | return -1; | |
60 | } | |
61 | ||
62 | pIPAddr = &(FixedInfo->DnsServerList); | |
63 | inet_aton(pIPAddr->IpAddress.String, &tmp_addr); | |
64 | *pdns_addr = tmp_addr; | |
65 | #if 0 | |
66 | printf( "DNS Servers:\n" ); | |
67 | printf( "DNS Addr:%s\n", pIPAddr->IpAddress.String ); | |
68 | ||
69 | pIPAddr = FixedInfo -> DnsServerList.Next; | |
70 | while ( pIPAddr ) { | |
71 | printf( "DNS Addr:%s\n", pIPAddr ->IpAddress.String ); | |
72 | pIPAddr = pIPAddr ->Next; | |
73 | } | |
74 | #endif | |
75 | if (FixedInfo) { | |
76 | GlobalFree(FixedInfo); | |
77 | FixedInfo = NULL; | |
78 | } | |
79 | return 0; | |
f0cbd3ec FB |
80 | } |
81 | ||
82 | #else | |
83 | ||
84 | static int get_dns_addr(struct in_addr *pdns_addr) | |
85 | { | |
86 | char buff[512]; | |
87 | char buff2[256]; | |
88 | FILE *f; | |
89 | int found = 0; | |
90 | struct in_addr tmp_addr; | |
91 | ||
92 | f = fopen("/etc/resolv.conf", "r"); | |
93 | if (!f) | |
94 | return -1; | |
95 | ||
96 | lprint("IP address of your DNS(s): "); | |
97 | while (fgets(buff, 512, f) != NULL) { | |
98 | if (sscanf(buff, "nameserver%*[ \t]%256s", buff2) == 1) { | |
99 | if (!inet_aton(buff2, &tmp_addr)) | |
100 | continue; | |
101 | if (tmp_addr.s_addr == loopback_addr.s_addr) | |
102 | tmp_addr = our_addr; | |
103 | /* If it's the first one, set it to dns_addr */ | |
104 | if (!found) | |
105 | *pdns_addr = tmp_addr; | |
106 | else | |
107 | lprint(", "); | |
108 | if (++found > 3) { | |
109 | lprint("(more)"); | |
110 | break; | |
111 | } else | |
112 | lprint("%s", inet_ntoa(tmp_addr)); | |
113 | } | |
114 | } | |
1d43a717 | 115 | fclose(f); |
f0cbd3ec FB |
116 | if (!found) |
117 | return -1; | |
118 | return 0; | |
119 | } | |
120 | ||
121 | #endif | |
122 | ||
379ff53d FB |
123 | #ifdef _WIN32 |
124 | void slirp_cleanup(void) | |
125 | { | |
126 | WSACleanup(); | |
127 | } | |
128 | #endif | |
129 | ||
f0cbd3ec FB |
130 | void slirp_init(void) |
131 | { | |
512176db | 132 | // debug_init("/tmp/slirp.log", DEBUG_DEFAULT); |
1d43a717 | 133 | |
379ff53d FB |
134 | #ifdef _WIN32 |
135 | { | |
136 | WSADATA Data; | |
137 | WSAStartup(MAKEWORD(2,0), &Data); | |
138 | atexit(slirp_cleanup); | |
139 | } | |
140 | #endif | |
141 | ||
f0cbd3ec FB |
142 | link_up = 1; |
143 | ||
144 | if_init(); | |
145 | ip_init(); | |
146 | ||
147 | /* Initialise mbufs *after* setting the MTU */ | |
148 | m_init(); | |
149 | ||
150 | /* set default addresses */ | |
f0cbd3ec FB |
151 | inet_aton("127.0.0.1", &loopback_addr); |
152 | ||
153 | if (get_dns_addr(&dns_addr) < 0) { | |
0f8134bf PB |
154 | dns_addr = loopback_addr; |
155 | fprintf (stderr, "Warning: No DNS servers found\n"); | |
f0cbd3ec FB |
156 | } |
157 | ||
158 | inet_aton(CTL_SPECIAL, &special_addr); | |
8dbca8dd | 159 | alias_addr.s_addr = special_addr.s_addr | htonl(CTL_ALIAS); |
f4e15b4b | 160 | getouraddr(); |
f0cbd3ec FB |
161 | } |
162 | ||
163 | #define CONN_CANFSEND(so) (((so)->so_state & (SS_FCANTSENDMORE|SS_ISFCONNECTED)) == SS_ISFCONNECTED) | |
164 | #define CONN_CANFRCV(so) (((so)->so_state & (SS_FCANTRCVMORE|SS_ISFCONNECTED)) == SS_ISFCONNECTED) | |
165 | #define UPD_NFDS(x) if (nfds < (x)) nfds = (x) | |
166 | ||
167 | /* | |
168 | * curtime kept to an accuracy of 1ms | |
169 | */ | |
379ff53d FB |
170 | #ifdef _WIN32 |
171 | static void updtime(void) | |
172 | { | |
173 | struct _timeb tb; | |
174 | ||
175 | _ftime(&tb); | |
176 | curtime = (u_int)tb.time * (u_int)1000; | |
177 | curtime += (u_int)tb.millitm; | |
178 | } | |
179 | #else | |
f0cbd3ec FB |
180 | static void updtime(void) |
181 | { | |
182 | gettimeofday(&tt, 0); | |
183 | ||
184 | curtime = (u_int)tt.tv_sec * (u_int)1000; | |
185 | curtime += (u_int)tt.tv_usec / (u_int)1000; | |
186 | ||
187 | if ((tt.tv_usec % 1000) >= 500) | |
188 | curtime++; | |
189 | } | |
379ff53d | 190 | #endif |
f0cbd3ec FB |
191 | |
192 | void slirp_select_fill(int *pnfds, | |
193 | fd_set *readfds, fd_set *writefds, fd_set *xfds) | |
194 | { | |
195 | struct socket *so, *so_next; | |
196 | struct timeval timeout; | |
197 | int nfds; | |
198 | int tmp_time; | |
199 | ||
200 | /* fail safe */ | |
201 | global_readfds = NULL; | |
202 | global_writefds = NULL; | |
203 | global_xfds = NULL; | |
204 | ||
205 | nfds = *pnfds; | |
206 | /* | |
207 | * First, TCP sockets | |
208 | */ | |
209 | do_slowtimo = 0; | |
210 | if (link_up) { | |
211 | /* | |
212 | * *_slowtimo needs calling if there are IP fragments | |
213 | * in the fragment queue, or there are TCP connections active | |
214 | */ | |
215 | do_slowtimo = ((tcb.so_next != &tcb) || | |
216 | ((struct ipasfrag *)&ipq != (struct ipasfrag *)ipq.next)); | |
217 | ||
218 | for (so = tcb.so_next; so != &tcb; so = so_next) { | |
219 | so_next = so->so_next; | |
220 | ||
221 | /* | |
222 | * See if we need a tcp_fasttimo | |
223 | */ | |
224 | if (time_fasttimo == 0 && so->so_tcpcb->t_flags & TF_DELACK) | |
225 | time_fasttimo = curtime; /* Flag when we want a fasttimo */ | |
226 | ||
227 | /* | |
228 | * NOFDREF can include still connecting to local-host, | |
229 | * newly socreated() sockets etc. Don't want to select these. | |
230 | */ | |
231 | if (so->so_state & SS_NOFDREF || so->s == -1) | |
232 | continue; | |
233 | ||
234 | /* | |
235 | * Set for reading sockets which are accepting | |
236 | */ | |
237 | if (so->so_state & SS_FACCEPTCONN) { | |
238 | FD_SET(so->s, readfds); | |
239 | UPD_NFDS(so->s); | |
240 | continue; | |
241 | } | |
242 | ||
243 | /* | |
244 | * Set for writing sockets which are connecting | |
245 | */ | |
246 | if (so->so_state & SS_ISFCONNECTING) { | |
247 | FD_SET(so->s, writefds); | |
248 | UPD_NFDS(so->s); | |
249 | continue; | |
250 | } | |
251 | ||
252 | /* | |
253 | * Set for writing if we are connected, can send more, and | |
254 | * we have something to send | |
255 | */ | |
256 | if (CONN_CANFSEND(so) && so->so_rcv.sb_cc) { | |
257 | FD_SET(so->s, writefds); | |
258 | UPD_NFDS(so->s); | |
259 | } | |
260 | ||
261 | /* | |
262 | * Set for reading (and urgent data) if we are connected, can | |
263 | * receive more, and we have room for it XXX /2 ? | |
264 | */ | |
265 | if (CONN_CANFRCV(so) && (so->so_snd.sb_cc < (so->so_snd.sb_datalen/2))) { | |
266 | FD_SET(so->s, readfds); | |
267 | FD_SET(so->s, xfds); | |
268 | UPD_NFDS(so->s); | |
269 | } | |
270 | } | |
271 | ||
272 | /* | |
273 | * UDP sockets | |
274 | */ | |
275 | for (so = udb.so_next; so != &udb; so = so_next) { | |
276 | so_next = so->so_next; | |
277 | ||
278 | /* | |
279 | * See if it's timed out | |
280 | */ | |
281 | if (so->so_expire) { | |
282 | if (so->so_expire <= curtime) { | |
283 | udp_detach(so); | |
284 | continue; | |
285 | } else | |
286 | do_slowtimo = 1; /* Let socket expire */ | |
287 | } | |
288 | ||
289 | /* | |
290 | * When UDP packets are received from over the | |
291 | * link, they're sendto()'d straight away, so | |
292 | * no need for setting for writing | |
293 | * Limit the number of packets queued by this session | |
294 | * to 4. Note that even though we try and limit this | |
295 | * to 4 packets, the session could have more queued | |
296 | * if the packets needed to be fragmented | |
297 | * (XXX <= 4 ?) | |
298 | */ | |
299 | if ((so->so_state & SS_ISFCONNECTED) && so->so_queued <= 4) { | |
300 | FD_SET(so->s, readfds); | |
301 | UPD_NFDS(so->s); | |
302 | } | |
303 | } | |
304 | } | |
305 | ||
306 | /* | |
307 | * Setup timeout to use minimum CPU usage, especially when idle | |
308 | */ | |
309 | ||
310 | /* | |
311 | * First, see the timeout needed by *timo | |
312 | */ | |
313 | timeout.tv_sec = 0; | |
314 | timeout.tv_usec = -1; | |
315 | /* | |
316 | * If a slowtimo is needed, set timeout to 500ms from the last | |
317 | * slow timeout. If a fast timeout is needed, set timeout within | |
318 | * 200ms of when it was requested. | |
319 | */ | |
320 | if (do_slowtimo) { | |
321 | /* XXX + 10000 because some select()'s aren't that accurate */ | |
322 | timeout.tv_usec = ((500 - (curtime - last_slowtimo)) * 1000) + 10000; | |
323 | if (timeout.tv_usec < 0) | |
324 | timeout.tv_usec = 0; | |
325 | else if (timeout.tv_usec > 510000) | |
326 | timeout.tv_usec = 510000; | |
327 | ||
328 | /* Can only fasttimo if we also slowtimo */ | |
329 | if (time_fasttimo) { | |
330 | tmp_time = (200 - (curtime - time_fasttimo)) * 1000; | |
331 | if (tmp_time < 0) | |
332 | tmp_time = 0; | |
333 | ||
334 | /* Choose the smallest of the 2 */ | |
335 | if (tmp_time < timeout.tv_usec) | |
336 | timeout.tv_usec = (u_int)tmp_time; | |
337 | } | |
338 | } | |
339 | *pnfds = nfds; | |
340 | } | |
341 | ||
342 | void slirp_select_poll(fd_set *readfds, fd_set *writefds, fd_set *xfds) | |
343 | { | |
344 | struct socket *so, *so_next; | |
345 | int ret; | |
346 | ||
347 | global_readfds = readfds; | |
348 | global_writefds = writefds; | |
349 | global_xfds = xfds; | |
350 | ||
351 | /* Update time */ | |
352 | updtime(); | |
353 | ||
354 | /* | |
355 | * See if anything has timed out | |
356 | */ | |
357 | if (link_up) { | |
df5f8956 | 358 | if (time_fasttimo && ((curtime - time_fasttimo) >= 2)) { |
f0cbd3ec FB |
359 | tcp_fasttimo(); |
360 | time_fasttimo = 0; | |
361 | } | |
362 | if (do_slowtimo && ((curtime - last_slowtimo) >= 499)) { | |
363 | ip_slowtimo(); | |
364 | tcp_slowtimo(); | |
365 | last_slowtimo = curtime; | |
366 | } | |
367 | } | |
368 | ||
369 | /* | |
370 | * Check sockets | |
371 | */ | |
372 | if (link_up) { | |
373 | /* | |
374 | * Check TCP sockets | |
375 | */ | |
376 | for (so = tcb.so_next; so != &tcb; so = so_next) { | |
377 | so_next = so->so_next; | |
378 | ||
379 | /* | |
380 | * FD_ISSET is meaningless on these sockets | |
381 | * (and they can crash the program) | |
382 | */ | |
383 | if (so->so_state & SS_NOFDREF || so->s == -1) | |
384 | continue; | |
385 | ||
386 | /* | |
387 | * Check for URG data | |
388 | * This will soread as well, so no need to | |
389 | * test for readfds below if this succeeds | |
390 | */ | |
391 | if (FD_ISSET(so->s, xfds)) | |
392 | sorecvoob(so); | |
393 | /* | |
394 | * Check sockets for reading | |
395 | */ | |
396 | else if (FD_ISSET(so->s, readfds)) { | |
397 | /* | |
398 | * Check for incoming connections | |
399 | */ | |
400 | if (so->so_state & SS_FACCEPTCONN) { | |
401 | tcp_connect(so); | |
402 | continue; | |
403 | } /* else */ | |
404 | ret = soread(so); | |
405 | ||
406 | /* Output it if we read something */ | |
407 | if (ret > 0) | |
408 | tcp_output(sototcpcb(so)); | |
409 | } | |
410 | ||
411 | /* | |
412 | * Check sockets for writing | |
413 | */ | |
414 | if (FD_ISSET(so->s, writefds)) { | |
415 | /* | |
416 | * Check for non-blocking, still-connecting sockets | |
417 | */ | |
418 | if (so->so_state & SS_ISFCONNECTING) { | |
419 | /* Connected */ | |
420 | so->so_state &= ~SS_ISFCONNECTING; | |
421 | ||
02d2c54c | 422 | ret = send(so->s, &ret, 0, 0); |
f0cbd3ec FB |
423 | if (ret < 0) { |
424 | /* XXXXX Must fix, zero bytes is a NOP */ | |
425 | if (errno == EAGAIN || errno == EWOULDBLOCK || | |
426 | errno == EINPROGRESS || errno == ENOTCONN) | |
427 | continue; | |
428 | ||
429 | /* else failed */ | |
430 | so->so_state = SS_NOFDREF; | |
431 | } | |
432 | /* else so->so_state &= ~SS_ISFCONNECTING; */ | |
433 | ||
434 | /* | |
435 | * Continue tcp_input | |
436 | */ | |
437 | tcp_input((struct mbuf *)NULL, sizeof(struct ip), so); | |
438 | /* continue; */ | |
439 | } else | |
440 | ret = sowrite(so); | |
441 | /* | |
442 | * XXXXX If we wrote something (a lot), there | |
443 | * could be a need for a window update. | |
444 | * In the worst case, the remote will send | |
445 | * a window probe to get things going again | |
446 | */ | |
447 | } | |
448 | ||
449 | /* | |
450 | * Probe a still-connecting, non-blocking socket | |
451 | * to check if it's still alive | |
452 | */ | |
453 | #ifdef PROBE_CONN | |
454 | if (so->so_state & SS_ISFCONNECTING) { | |
02d2c54c | 455 | ret = recv(so->s, (char *)&ret, 0,0); |
f0cbd3ec FB |
456 | |
457 | if (ret < 0) { | |
458 | /* XXX */ | |
459 | if (errno == EAGAIN || errno == EWOULDBLOCK || | |
460 | errno == EINPROGRESS || errno == ENOTCONN) | |
461 | continue; /* Still connecting, continue */ | |
462 | ||
463 | /* else failed */ | |
464 | so->so_state = SS_NOFDREF; | |
465 | ||
466 | /* tcp_input will take care of it */ | |
467 | } else { | |
02d2c54c | 468 | ret = send(so->s, &ret, 0,0); |
f0cbd3ec FB |
469 | if (ret < 0) { |
470 | /* XXX */ | |
471 | if (errno == EAGAIN || errno == EWOULDBLOCK || | |
472 | errno == EINPROGRESS || errno == ENOTCONN) | |
473 | continue; | |
474 | /* else failed */ | |
475 | so->so_state = SS_NOFDREF; | |
476 | } else | |
477 | so->so_state &= ~SS_ISFCONNECTING; | |
478 | ||
479 | } | |
480 | tcp_input((struct mbuf *)NULL, sizeof(struct ip),so); | |
481 | } /* SS_ISFCONNECTING */ | |
482 | #endif | |
483 | } | |
484 | ||
485 | /* | |
486 | * Now UDP sockets. | |
487 | * Incoming packets are sent straight away, they're not buffered. | |
488 | * Incoming UDP data isn't buffered either. | |
489 | */ | |
490 | for (so = udb.so_next; so != &udb; so = so_next) { | |
491 | so_next = so->so_next; | |
492 | ||
493 | if (so->s != -1 && FD_ISSET(so->s, readfds)) { | |
494 | sorecvfrom(so); | |
495 | } | |
496 | } | |
497 | } | |
498 | ||
499 | /* | |
500 | * See if we can start outputting | |
501 | */ | |
502 | if (if_queued && link_up) | |
503 | if_start(); | |
02d2c54c FB |
504 | |
505 | /* clear global file descriptor sets. | |
506 | * these reside on the stack in vl.c | |
507 | * so they're unusable if we're not in | |
508 | * slirp_select_fill or slirp_select_poll. | |
509 | */ | |
510 | global_readfds = NULL; | |
511 | global_writefds = NULL; | |
512 | global_xfds = NULL; | |
f0cbd3ec FB |
513 | } |
514 | ||
515 | #define ETH_ALEN 6 | |
516 | #define ETH_HLEN 14 | |
517 | ||
518 | #define ETH_P_IP 0x0800 /* Internet Protocol packet */ | |
519 | #define ETH_P_ARP 0x0806 /* Address Resolution packet */ | |
520 | ||
521 | #define ARPOP_REQUEST 1 /* ARP request */ | |
522 | #define ARPOP_REPLY 2 /* ARP reply */ | |
523 | ||
524 | struct ethhdr | |
525 | { | |
526 | unsigned char h_dest[ETH_ALEN]; /* destination eth addr */ | |
527 | unsigned char h_source[ETH_ALEN]; /* source ether addr */ | |
528 | unsigned short h_proto; /* packet type ID field */ | |
529 | }; | |
530 | ||
531 | struct arphdr | |
532 | { | |
533 | unsigned short ar_hrd; /* format of hardware address */ | |
534 | unsigned short ar_pro; /* format of protocol address */ | |
535 | unsigned char ar_hln; /* length of hardware address */ | |
536 | unsigned char ar_pln; /* length of protocol address */ | |
537 | unsigned short ar_op; /* ARP opcode (command) */ | |
538 | ||
539 | /* | |
540 | * Ethernet looks like this : This bit is variable sized however... | |
541 | */ | |
542 | unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */ | |
543 | unsigned char ar_sip[4]; /* sender IP address */ | |
544 | unsigned char ar_tha[ETH_ALEN]; /* target hardware address */ | |
545 | unsigned char ar_tip[4]; /* target IP address */ | |
546 | }; | |
547 | ||
548 | void arp_input(const uint8_t *pkt, int pkt_len) | |
549 | { | |
550 | struct ethhdr *eh = (struct ethhdr *)pkt; | |
551 | struct arphdr *ah = (struct arphdr *)(pkt + ETH_HLEN); | |
552 | uint8_t arp_reply[ETH_HLEN + sizeof(struct arphdr)]; | |
553 | struct ethhdr *reh = (struct ethhdr *)arp_reply; | |
554 | struct arphdr *rah = (struct arphdr *)(arp_reply + ETH_HLEN); | |
555 | int ar_op; | |
a3d4af03 | 556 | struct ex_list *ex_ptr; |
f0cbd3ec FB |
557 | |
558 | ar_op = ntohs(ah->ar_op); | |
559 | switch(ar_op) { | |
560 | case ARPOP_REQUEST: | |
a3d4af03 FB |
561 | if (!memcmp(ah->ar_tip, &special_addr, 3)) { |
562 | if (ah->ar_tip[3] == CTL_DNS || ah->ar_tip[3] == CTL_ALIAS) | |
563 | goto arp_ok; | |
564 | for (ex_ptr = exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next) { | |
565 | if (ex_ptr->ex_addr == ah->ar_tip[3]) | |
566 | goto arp_ok; | |
567 | } | |
568 | return; | |
569 | arp_ok: | |
f0cbd3ec FB |
570 | /* XXX: make an ARP request to have the client address */ |
571 | memcpy(client_ethaddr, eh->h_source, ETH_ALEN); | |
572 | ||
573 | /* ARP request for alias/dns mac address */ | |
574 | memcpy(reh->h_dest, pkt + ETH_ALEN, ETH_ALEN); | |
575 | memcpy(reh->h_source, special_ethaddr, ETH_ALEN - 1); | |
576 | reh->h_source[5] = ah->ar_tip[3]; | |
577 | reh->h_proto = htons(ETH_P_ARP); | |
578 | ||
579 | rah->ar_hrd = htons(1); | |
580 | rah->ar_pro = htons(ETH_P_IP); | |
581 | rah->ar_hln = ETH_ALEN; | |
582 | rah->ar_pln = 4; | |
583 | rah->ar_op = htons(ARPOP_REPLY); | |
584 | memcpy(rah->ar_sha, reh->h_source, ETH_ALEN); | |
585 | memcpy(rah->ar_sip, ah->ar_tip, 4); | |
586 | memcpy(rah->ar_tha, ah->ar_sha, ETH_ALEN); | |
587 | memcpy(rah->ar_tip, ah->ar_sip, 4); | |
588 | slirp_output(arp_reply, sizeof(arp_reply)); | |
589 | } | |
590 | break; | |
591 | default: | |
592 | break; | |
593 | } | |
594 | } | |
595 | ||
596 | void slirp_input(const uint8_t *pkt, int pkt_len) | |
597 | { | |
598 | struct mbuf *m; | |
599 | int proto; | |
600 | ||
601 | if (pkt_len < ETH_HLEN) | |
602 | return; | |
603 | ||
604 | proto = ntohs(*(uint16_t *)(pkt + 12)); | |
605 | switch(proto) { | |
606 | case ETH_P_ARP: | |
607 | arp_input(pkt, pkt_len); | |
608 | break; | |
609 | case ETH_P_IP: | |
610 | m = m_get(); | |
611 | if (!m) | |
612 | return; | |
38f3e7c2 FB |
613 | /* Note: we add to align the IP header */ |
614 | m->m_len = pkt_len + 2; | |
615 | memcpy(m->m_data + 2, pkt, pkt_len); | |
f0cbd3ec | 616 | |
38f3e7c2 FB |
617 | m->m_data += 2 + ETH_HLEN; |
618 | m->m_len -= 2 + ETH_HLEN; | |
f0cbd3ec FB |
619 | |
620 | ip_input(m); | |
621 | break; | |
622 | default: | |
623 | break; | |
624 | } | |
625 | } | |
626 | ||
627 | /* output the IP packet to the ethernet device */ | |
628 | void if_encap(const uint8_t *ip_data, int ip_data_len) | |
629 | { | |
630 | uint8_t buf[1600]; | |
631 | struct ethhdr *eh = (struct ethhdr *)buf; | |
632 | ||
633 | if (ip_data_len + ETH_HLEN > sizeof(buf)) | |
634 | return; | |
635 | ||
636 | memcpy(eh->h_dest, client_ethaddr, ETH_ALEN); | |
637 | memcpy(eh->h_source, special_ethaddr, ETH_ALEN - 1); | |
a3d4af03 | 638 | /* XXX: not correct */ |
f0cbd3ec FB |
639 | eh->h_source[5] = CTL_ALIAS; |
640 | eh->h_proto = htons(ETH_P_IP); | |
641 | memcpy(buf + sizeof(struct ethhdr), ip_data, ip_data_len); | |
642 | slirp_output(buf, ip_data_len + ETH_HLEN); | |
643 | } | |
9bf05444 FB |
644 | |
645 | int slirp_redir(int is_udp, int host_port, | |
646 | struct in_addr guest_addr, int guest_port) | |
647 | { | |
648 | if (is_udp) { | |
649 | if (!udp_listen(htons(host_port), guest_addr.s_addr, | |
650 | htons(guest_port), 0)) | |
651 | return -1; | |
652 | } else { | |
653 | if (!solisten(htons(host_port), guest_addr.s_addr, | |
654 | htons(guest_port), 0)) | |
655 | return -1; | |
656 | } | |
657 | return 0; | |
658 | } | |
a3d4af03 FB |
659 | |
660 | int slirp_add_exec(int do_pty, const char *args, int addr_low_byte, | |
661 | int guest_port) | |
662 | { | |
663 | return add_exec(&exec_list, do_pty, (char *)args, | |
664 | addr_low_byte, htons(guest_port)); | |
665 | } |