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