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1 | /* | |
2 | * Copyright (c) 1995 Danny Gasparovski. | |
3 | * | |
4 | * Please read the file COPYRIGHT for the | |
5 | * terms and conditions of the copyright. | |
6 | */ | |
7 | ||
8 | #include "qemu-common.h" | |
9 | #include <slirp.h> | |
10 | #include "ip_icmp.h" | |
11 | #ifdef __sun__ | |
12 | #include <sys/filio.h> | |
13 | #endif | |
14 | ||
15 | static void sofcantrcvmore(struct socket *so); | |
16 | static void sofcantsendmore(struct socket *so); | |
17 | ||
18 | struct socket * | |
19 | solookup(struct socket *head, struct in_addr laddr, u_int lport, | |
20 | struct in_addr faddr, u_int fport) | |
21 | { | |
22 | struct socket *so; | |
23 | ||
24 | for (so = head->so_next; so != head; so = so->so_next) { | |
25 | if (so->so_lport == lport && | |
26 | so->so_laddr.s_addr == laddr.s_addr && | |
27 | so->so_faddr.s_addr == faddr.s_addr && | |
28 | so->so_fport == fport) | |
29 | break; | |
30 | } | |
31 | ||
32 | if (so == head) | |
33 | return (struct socket *)NULL; | |
34 | return so; | |
35 | ||
36 | } | |
37 | ||
38 | /* | |
39 | * Create a new socket, initialise the fields | |
40 | * It is the responsibility of the caller to | |
41 | * insque() it into the correct linked-list | |
42 | */ | |
43 | struct socket * | |
44 | socreate(Slirp *slirp) | |
45 | { | |
46 | struct socket *so; | |
47 | ||
48 | so = (struct socket *)malloc(sizeof(struct socket)); | |
49 | if(so) { | |
50 | memset(so, 0, sizeof(struct socket)); | |
51 | so->so_state = SS_NOFDREF; | |
52 | so->s = -1; | |
53 | so->slirp = slirp; | |
54 | } | |
55 | return(so); | |
56 | } | |
57 | ||
58 | /* | |
59 | * remque and free a socket, clobber cache | |
60 | */ | |
61 | void | |
62 | sofree(struct socket *so) | |
63 | { | |
64 | Slirp *slirp = so->slirp; | |
65 | ||
66 | if (so->so_emu==EMU_RSH && so->extra) { | |
67 | sofree(so->extra); | |
68 | so->extra=NULL; | |
69 | } | |
70 | if (so == slirp->tcp_last_so) { | |
71 | slirp->tcp_last_so = &slirp->tcb; | |
72 | } else if (so == slirp->udp_last_so) { | |
73 | slirp->udp_last_so = &slirp->udb; | |
74 | } | |
75 | m_free(so->so_m); | |
76 | ||
77 | if(so->so_next && so->so_prev) | |
78 | remque(so); /* crashes if so is not in a queue */ | |
79 | ||
80 | free(so); | |
81 | } | |
82 | ||
83 | size_t sopreprbuf(struct socket *so, struct iovec *iov, int *np) | |
84 | { | |
85 | int n, lss, total; | |
86 | struct sbuf *sb = &so->so_snd; | |
87 | int len = sb->sb_datalen - sb->sb_cc; | |
88 | int mss = so->so_tcpcb->t_maxseg; | |
89 | ||
90 | DEBUG_CALL("sopreprbuf"); | |
91 | DEBUG_ARG("so = %lx", (long )so); | |
92 | ||
93 | len = sb->sb_datalen - sb->sb_cc; | |
94 | ||
95 | if (len <= 0) | |
96 | return 0; | |
97 | ||
98 | iov[0].iov_base = sb->sb_wptr; | |
99 | iov[1].iov_base = NULL; | |
100 | iov[1].iov_len = 0; | |
101 | if (sb->sb_wptr < sb->sb_rptr) { | |
102 | iov[0].iov_len = sb->sb_rptr - sb->sb_wptr; | |
103 | /* Should never succeed, but... */ | |
104 | if (iov[0].iov_len > len) | |
105 | iov[0].iov_len = len; | |
106 | if (iov[0].iov_len > mss) | |
107 | iov[0].iov_len -= iov[0].iov_len%mss; | |
108 | n = 1; | |
109 | } else { | |
110 | iov[0].iov_len = (sb->sb_data + sb->sb_datalen) - sb->sb_wptr; | |
111 | /* Should never succeed, but... */ | |
112 | if (iov[0].iov_len > len) iov[0].iov_len = len; | |
113 | len -= iov[0].iov_len; | |
114 | if (len) { | |
115 | iov[1].iov_base = sb->sb_data; | |
116 | iov[1].iov_len = sb->sb_rptr - sb->sb_data; | |
117 | if(iov[1].iov_len > len) | |
118 | iov[1].iov_len = len; | |
119 | total = iov[0].iov_len + iov[1].iov_len; | |
120 | if (total > mss) { | |
121 | lss = total%mss; | |
122 | if (iov[1].iov_len > lss) { | |
123 | iov[1].iov_len -= lss; | |
124 | n = 2; | |
125 | } else { | |
126 | lss -= iov[1].iov_len; | |
127 | iov[0].iov_len -= lss; | |
128 | n = 1; | |
129 | } | |
130 | } else | |
131 | n = 2; | |
132 | } else { | |
133 | if (iov[0].iov_len > mss) | |
134 | iov[0].iov_len -= iov[0].iov_len%mss; | |
135 | n = 1; | |
136 | } | |
137 | } | |
138 | if (np) | |
139 | *np = n; | |
140 | ||
141 | return iov[0].iov_len + (n - 1) * iov[1].iov_len; | |
142 | } | |
143 | ||
144 | /* | |
145 | * Read from so's socket into sb_snd, updating all relevant sbuf fields | |
146 | * NOTE: This will only be called if it is select()ed for reading, so | |
147 | * a read() of 0 (or less) means it's disconnected | |
148 | */ | |
149 | int | |
150 | soread(struct socket *so) | |
151 | { | |
152 | int n, nn; | |
153 | struct sbuf *sb = &so->so_snd; | |
154 | struct iovec iov[2]; | |
155 | ||
156 | DEBUG_CALL("soread"); | |
157 | DEBUG_ARG("so = %lx", (long )so); | |
158 | ||
159 | /* | |
160 | * No need to check if there's enough room to read. | |
161 | * soread wouldn't have been called if there weren't | |
162 | */ | |
163 | sopreprbuf(so, iov, &n); | |
164 | ||
165 | #ifdef HAVE_READV | |
166 | nn = readv(so->s, (struct iovec *)iov, n); | |
167 | DEBUG_MISC((dfd, " ... read nn = %d bytes\n", nn)); | |
168 | #else | |
169 | nn = recv(so->s, iov[0].iov_base, iov[0].iov_len,0); | |
170 | #endif | |
171 | if (nn <= 0) { | |
172 | if (nn < 0 && (errno == EINTR || errno == EAGAIN)) | |
173 | return 0; | |
174 | else { | |
175 | DEBUG_MISC((dfd, " --- soread() disconnected, nn = %d, errno = %d-%s\n", nn, errno,strerror(errno))); | |
176 | sofcantrcvmore(so); | |
177 | tcp_sockclosed(sototcpcb(so)); | |
178 | return -1; | |
179 | } | |
180 | } | |
181 | ||
182 | #ifndef HAVE_READV | |
183 | /* | |
184 | * If there was no error, try and read the second time round | |
185 | * We read again if n = 2 (ie, there's another part of the buffer) | |
186 | * and we read as much as we could in the first read | |
187 | * We don't test for <= 0 this time, because there legitimately | |
188 | * might not be any more data (since the socket is non-blocking), | |
189 | * a close will be detected on next iteration. | |
190 | * A return of -1 wont (shouldn't) happen, since it didn't happen above | |
191 | */ | |
192 | if (n == 2 && nn == iov[0].iov_len) { | |
193 | int ret; | |
194 | ret = recv(so->s, iov[1].iov_base, iov[1].iov_len,0); | |
195 | if (ret > 0) | |
196 | nn += ret; | |
197 | } | |
198 | ||
199 | DEBUG_MISC((dfd, " ... read nn = %d bytes\n", nn)); | |
200 | #endif | |
201 | ||
202 | /* Update fields */ | |
203 | sb->sb_cc += nn; | |
204 | sb->sb_wptr += nn; | |
205 | if (sb->sb_wptr >= (sb->sb_data + sb->sb_datalen)) | |
206 | sb->sb_wptr -= sb->sb_datalen; | |
207 | return nn; | |
208 | } | |
209 | ||
210 | int soreadbuf(struct socket *so, const char *buf, int size) | |
211 | { | |
212 | int n, nn, copy = size; | |
213 | struct sbuf *sb = &so->so_snd; | |
214 | struct iovec iov[2]; | |
215 | ||
216 | DEBUG_CALL("soreadbuf"); | |
217 | DEBUG_ARG("so = %lx", (long )so); | |
218 | ||
219 | /* | |
220 | * No need to check if there's enough room to read. | |
221 | * soread wouldn't have been called if there weren't | |
222 | */ | |
223 | if (sopreprbuf(so, iov, &n) < size) | |
224 | goto err; | |
225 | ||
226 | nn = MIN(iov[0].iov_len, copy); | |
227 | memcpy(iov[0].iov_base, buf, nn); | |
228 | ||
229 | copy -= nn; | |
230 | buf += nn; | |
231 | ||
232 | if (copy == 0) | |
233 | goto done; | |
234 | ||
235 | memcpy(iov[1].iov_base, buf, copy); | |
236 | ||
237 | done: | |
238 | /* Update fields */ | |
239 | sb->sb_cc += size; | |
240 | sb->sb_wptr += size; | |
241 | if (sb->sb_wptr >= (sb->sb_data + sb->sb_datalen)) | |
242 | sb->sb_wptr -= sb->sb_datalen; | |
243 | return size; | |
244 | err: | |
245 | ||
246 | sofcantrcvmore(so); | |
247 | tcp_sockclosed(sototcpcb(so)); | |
248 | fprintf(stderr, "soreadbuf buffer to small"); | |
249 | return -1; | |
250 | } | |
251 | ||
252 | /* | |
253 | * Get urgent data | |
254 | * | |
255 | * When the socket is created, we set it SO_OOBINLINE, | |
256 | * so when OOB data arrives, we soread() it and everything | |
257 | * in the send buffer is sent as urgent data | |
258 | */ | |
259 | void | |
260 | sorecvoob(struct socket *so) | |
261 | { | |
262 | struct tcpcb *tp = sototcpcb(so); | |
263 | ||
264 | DEBUG_CALL("sorecvoob"); | |
265 | DEBUG_ARG("so = %lx", (long)so); | |
266 | ||
267 | /* | |
268 | * We take a guess at how much urgent data has arrived. | |
269 | * In most situations, when urgent data arrives, the next | |
270 | * read() should get all the urgent data. This guess will | |
271 | * be wrong however if more data arrives just after the | |
272 | * urgent data, or the read() doesn't return all the | |
273 | * urgent data. | |
274 | */ | |
275 | soread(so); | |
276 | tp->snd_up = tp->snd_una + so->so_snd.sb_cc; | |
277 | tp->t_force = 1; | |
278 | tcp_output(tp); | |
279 | tp->t_force = 0; | |
280 | } | |
281 | ||
282 | /* | |
283 | * Send urgent data | |
284 | * There's a lot duplicated code here, but... | |
285 | */ | |
286 | int | |
287 | sosendoob(struct socket *so) | |
288 | { | |
289 | struct sbuf *sb = &so->so_rcv; | |
290 | char buff[2048]; /* XXX Shouldn't be sending more oob data than this */ | |
291 | ||
292 | int n, len; | |
293 | ||
294 | DEBUG_CALL("sosendoob"); | |
295 | DEBUG_ARG("so = %lx", (long)so); | |
296 | DEBUG_ARG("sb->sb_cc = %d", sb->sb_cc); | |
297 | ||
298 | if (so->so_urgc > 2048) | |
299 | so->so_urgc = 2048; /* XXXX */ | |
300 | ||
301 | if (sb->sb_rptr < sb->sb_wptr) { | |
302 | /* We can send it directly */ | |
303 | n = slirp_send(so, sb->sb_rptr, so->so_urgc, (MSG_OOB)); /* |MSG_DONTWAIT)); */ | |
304 | so->so_urgc -= n; | |
305 | ||
306 | DEBUG_MISC((dfd, " --- sent %d bytes urgent data, %d urgent bytes left\n", n, so->so_urgc)); | |
307 | } else { | |
308 | /* | |
309 | * Since there's no sendv or sendtov like writev, | |
310 | * we must copy all data to a linear buffer then | |
311 | * send it all | |
312 | */ | |
313 | len = (sb->sb_data + sb->sb_datalen) - sb->sb_rptr; | |
314 | if (len > so->so_urgc) len = so->so_urgc; | |
315 | memcpy(buff, sb->sb_rptr, len); | |
316 | so->so_urgc -= len; | |
317 | if (so->so_urgc) { | |
318 | n = sb->sb_wptr - sb->sb_data; | |
319 | if (n > so->so_urgc) n = so->so_urgc; | |
320 | memcpy((buff + len), sb->sb_data, n); | |
321 | so->so_urgc -= n; | |
322 | len += n; | |
323 | } | |
324 | n = slirp_send(so, buff, len, (MSG_OOB)); /* |MSG_DONTWAIT)); */ | |
325 | #ifdef DEBUG | |
326 | if (n != len) | |
327 | DEBUG_ERROR((dfd, "Didn't send all data urgently XXXXX\n")); | |
328 | #endif | |
329 | DEBUG_MISC((dfd, " ---2 sent %d bytes urgent data, %d urgent bytes left\n", n, so->so_urgc)); | |
330 | } | |
331 | ||
332 | sb->sb_cc -= n; | |
333 | sb->sb_rptr += n; | |
334 | if (sb->sb_rptr >= (sb->sb_data + sb->sb_datalen)) | |
335 | sb->sb_rptr -= sb->sb_datalen; | |
336 | ||
337 | return n; | |
338 | } | |
339 | ||
340 | /* | |
341 | * Write data from so_rcv to so's socket, | |
342 | * updating all sbuf field as necessary | |
343 | */ | |
344 | int | |
345 | sowrite(struct socket *so) | |
346 | { | |
347 | int n,nn; | |
348 | struct sbuf *sb = &so->so_rcv; | |
349 | int len = sb->sb_cc; | |
350 | struct iovec iov[2]; | |
351 | ||
352 | DEBUG_CALL("sowrite"); | |
353 | DEBUG_ARG("so = %lx", (long)so); | |
354 | ||
355 | if (so->so_urgc) { | |
356 | sosendoob(so); | |
357 | if (sb->sb_cc == 0) | |
358 | return 0; | |
359 | } | |
360 | ||
361 | /* | |
362 | * No need to check if there's something to write, | |
363 | * sowrite wouldn't have been called otherwise | |
364 | */ | |
365 | ||
366 | len = sb->sb_cc; | |
367 | ||
368 | iov[0].iov_base = sb->sb_rptr; | |
369 | iov[1].iov_base = NULL; | |
370 | iov[1].iov_len = 0; | |
371 | if (sb->sb_rptr < sb->sb_wptr) { | |
372 | iov[0].iov_len = sb->sb_wptr - sb->sb_rptr; | |
373 | /* Should never succeed, but... */ | |
374 | if (iov[0].iov_len > len) iov[0].iov_len = len; | |
375 | n = 1; | |
376 | } else { | |
377 | iov[0].iov_len = (sb->sb_data + sb->sb_datalen) - sb->sb_rptr; | |
378 | if (iov[0].iov_len > len) iov[0].iov_len = len; | |
379 | len -= iov[0].iov_len; | |
380 | if (len) { | |
381 | iov[1].iov_base = sb->sb_data; | |
382 | iov[1].iov_len = sb->sb_wptr - sb->sb_data; | |
383 | if (iov[1].iov_len > len) iov[1].iov_len = len; | |
384 | n = 2; | |
385 | } else | |
386 | n = 1; | |
387 | } | |
388 | /* Check if there's urgent data to send, and if so, send it */ | |
389 | ||
390 | #ifdef HAVE_READV | |
391 | nn = writev(so->s, (const struct iovec *)iov, n); | |
392 | ||
393 | DEBUG_MISC((dfd, " ... wrote nn = %d bytes\n", nn)); | |
394 | #else | |
395 | nn = slirp_send(so, iov[0].iov_base, iov[0].iov_len,0); | |
396 | #endif | |
397 | /* This should never happen, but people tell me it does *shrug* */ | |
398 | if (nn < 0 && (errno == EAGAIN || errno == EINTR)) | |
399 | return 0; | |
400 | ||
401 | if (nn <= 0) { | |
402 | DEBUG_MISC((dfd, " --- sowrite disconnected, so->so_state = %x, errno = %d\n", | |
403 | so->so_state, errno)); | |
404 | sofcantsendmore(so); | |
405 | tcp_sockclosed(sototcpcb(so)); | |
406 | return -1; | |
407 | } | |
408 | ||
409 | #ifndef HAVE_READV | |
410 | if (n == 2 && nn == iov[0].iov_len) { | |
411 | int ret; | |
412 | ret = slirp_send(so, iov[1].iov_base, iov[1].iov_len,0); | |
413 | if (ret > 0) | |
414 | nn += ret; | |
415 | } | |
416 | DEBUG_MISC((dfd, " ... wrote nn = %d bytes\n", nn)); | |
417 | #endif | |
418 | ||
419 | /* Update sbuf */ | |
420 | sb->sb_cc -= nn; | |
421 | sb->sb_rptr += nn; | |
422 | if (sb->sb_rptr >= (sb->sb_data + sb->sb_datalen)) | |
423 | sb->sb_rptr -= sb->sb_datalen; | |
424 | ||
425 | /* | |
426 | * If in DRAIN mode, and there's no more data, set | |
427 | * it CANTSENDMORE | |
428 | */ | |
429 | if ((so->so_state & SS_FWDRAIN) && sb->sb_cc == 0) | |
430 | sofcantsendmore(so); | |
431 | ||
432 | return nn; | |
433 | } | |
434 | ||
435 | /* | |
436 | * recvfrom() a UDP socket | |
437 | */ | |
438 | void | |
439 | sorecvfrom(struct socket *so) | |
440 | { | |
441 | struct sockaddr_in addr; | |
442 | socklen_t addrlen = sizeof(struct sockaddr_in); | |
443 | ||
444 | DEBUG_CALL("sorecvfrom"); | |
445 | DEBUG_ARG("so = %lx", (long)so); | |
446 | ||
447 | if (so->so_type == IPPROTO_ICMP) { /* This is a "ping" reply */ | |
448 | char buff[256]; | |
449 | int len; | |
450 | ||
451 | len = recvfrom(so->s, buff, 256, 0, | |
452 | (struct sockaddr *)&addr, &addrlen); | |
453 | /* XXX Check if reply is "correct"? */ | |
454 | ||
455 | if(len == -1 || len == 0) { | |
456 | u_char code=ICMP_UNREACH_PORT; | |
457 | ||
458 | if(errno == EHOSTUNREACH) code=ICMP_UNREACH_HOST; | |
459 | else if(errno == ENETUNREACH) code=ICMP_UNREACH_NET; | |
460 | ||
461 | DEBUG_MISC((dfd," udp icmp rx errno = %d-%s\n", | |
462 | errno,strerror(errno))); | |
463 | icmp_error(so->so_m, ICMP_UNREACH,code, 0,strerror(errno)); | |
464 | } else { | |
465 | icmp_reflect(so->so_m); | |
466 | so->so_m = NULL; /* Don't m_free() it again! */ | |
467 | } | |
468 | /* No need for this socket anymore, udp_detach it */ | |
469 | udp_detach(so); | |
470 | } else { /* A "normal" UDP packet */ | |
471 | struct mbuf *m; | |
472 | int len; | |
473 | #ifdef _WIN32 | |
474 | unsigned long n; | |
475 | #else | |
476 | int n; | |
477 | #endif | |
478 | ||
479 | m = m_get(so->slirp); | |
480 | if (!m) { | |
481 | return; | |
482 | } | |
483 | m->m_data += IF_MAXLINKHDR; | |
484 | ||
485 | /* | |
486 | * XXX Shouldn't FIONREAD packets destined for port 53, | |
487 | * but I don't know the max packet size for DNS lookups | |
488 | */ | |
489 | len = M_FREEROOM(m); | |
490 | /* if (so->so_fport != htons(53)) { */ | |
491 | ioctlsocket(so->s, FIONREAD, &n); | |
492 | ||
493 | if (n > len) { | |
494 | n = (m->m_data - m->m_dat) + m->m_len + n + 1; | |
495 | m_inc(m, n); | |
496 | len = M_FREEROOM(m); | |
497 | } | |
498 | /* } */ | |
499 | ||
500 | m->m_len = recvfrom(so->s, m->m_data, len, 0, | |
501 | (struct sockaddr *)&addr, &addrlen); | |
502 | DEBUG_MISC((dfd, " did recvfrom %d, errno = %d-%s\n", | |
503 | m->m_len, errno,strerror(errno))); | |
504 | if(m->m_len<0) { | |
505 | u_char code=ICMP_UNREACH_PORT; | |
506 | ||
507 | if(errno == EHOSTUNREACH) code=ICMP_UNREACH_HOST; | |
508 | else if(errno == ENETUNREACH) code=ICMP_UNREACH_NET; | |
509 | ||
510 | DEBUG_MISC((dfd," rx error, tx icmp ICMP_UNREACH:%i\n", code)); | |
511 | icmp_error(so->so_m, ICMP_UNREACH,code, 0,strerror(errno)); | |
512 | m_free(m); | |
513 | } else { | |
514 | /* | |
515 | * Hack: domain name lookup will be used the most for UDP, | |
516 | * and since they'll only be used once there's no need | |
517 | * for the 4 minute (or whatever) timeout... So we time them | |
518 | * out much quicker (10 seconds for now...) | |
519 | */ | |
520 | if (so->so_expire) { | |
521 | if (so->so_fport == htons(53)) | |
522 | so->so_expire = curtime + SO_EXPIREFAST; | |
523 | else | |
524 | so->so_expire = curtime + SO_EXPIRE; | |
525 | } | |
526 | ||
527 | /* | |
528 | * If this packet was destined for CTL_ADDR, | |
529 | * make it look like that's where it came from, done by udp_output | |
530 | */ | |
531 | udp_output(so, m, &addr); | |
532 | } /* rx error */ | |
533 | } /* if ping packet */ | |
534 | } | |
535 | ||
536 | /* | |
537 | * sendto() a socket | |
538 | */ | |
539 | int | |
540 | sosendto(struct socket *so, struct mbuf *m) | |
541 | { | |
542 | Slirp *slirp = so->slirp; | |
543 | int ret; | |
544 | struct sockaddr_in addr; | |
545 | ||
546 | DEBUG_CALL("sosendto"); | |
547 | DEBUG_ARG("so = %lx", (long)so); | |
548 | DEBUG_ARG("m = %lx", (long)m); | |
549 | ||
550 | addr.sin_family = AF_INET; | |
551 | if ((so->so_faddr.s_addr & slirp->vnetwork_mask.s_addr) == | |
552 | slirp->vnetwork_addr.s_addr) { | |
553 | /* It's an alias */ | |
554 | if (so->so_faddr.s_addr == slirp->vnameserver_addr.s_addr) { | |
555 | if (get_dns_addr(&addr.sin_addr) < 0) | |
556 | addr.sin_addr = loopback_addr; | |
557 | } else { | |
558 | addr.sin_addr = loopback_addr; | |
559 | } | |
560 | } else | |
561 | addr.sin_addr = so->so_faddr; | |
562 | addr.sin_port = so->so_fport; | |
563 | ||
564 | DEBUG_MISC((dfd, " sendto()ing, addr.sin_port=%d, addr.sin_addr.s_addr=%.16s\n", ntohs(addr.sin_port), inet_ntoa(addr.sin_addr))); | |
565 | ||
566 | /* Don't care what port we get */ | |
567 | ret = sendto(so->s, m->m_data, m->m_len, 0, | |
568 | (struct sockaddr *)&addr, sizeof (struct sockaddr)); | |
569 | if (ret < 0) | |
570 | return -1; | |
571 | ||
572 | /* | |
573 | * Kill the socket if there's no reply in 4 minutes, | |
574 | * but only if it's an expirable socket | |
575 | */ | |
576 | if (so->so_expire) | |
577 | so->so_expire = curtime + SO_EXPIRE; | |
578 | so->so_state &= SS_PERSISTENT_MASK; | |
579 | so->so_state |= SS_ISFCONNECTED; /* So that it gets select()ed */ | |
580 | return 0; | |
581 | } | |
582 | ||
583 | /* | |
584 | * Listen for incoming TCP connections | |
585 | */ | |
586 | struct socket * | |
587 | tcp_listen(Slirp *slirp, u_int32_t haddr, u_int hport, u_int32_t laddr, | |
588 | u_int lport, int flags) | |
589 | { | |
590 | struct sockaddr_in addr; | |
591 | struct socket *so; | |
592 | int s, opt = 1; | |
593 | socklen_t addrlen = sizeof(addr); | |
594 | ||
595 | DEBUG_CALL("tcp_listen"); | |
596 | DEBUG_ARG("haddr = %x", haddr); | |
597 | DEBUG_ARG("hport = %d", hport); | |
598 | DEBUG_ARG("laddr = %x", laddr); | |
599 | DEBUG_ARG("lport = %d", lport); | |
600 | DEBUG_ARG("flags = %x", flags); | |
601 | ||
602 | so = socreate(slirp); | |
603 | if (!so) { | |
604 | return NULL; | |
605 | } | |
606 | ||
607 | /* Don't tcp_attach... we don't need so_snd nor so_rcv */ | |
608 | if ((so->so_tcpcb = tcp_newtcpcb(so)) == NULL) { | |
609 | free(so); | |
610 | return NULL; | |
611 | } | |
612 | insque(so, &slirp->tcb); | |
613 | ||
614 | /* | |
615 | * SS_FACCEPTONCE sockets must time out. | |
616 | */ | |
617 | if (flags & SS_FACCEPTONCE) | |
618 | so->so_tcpcb->t_timer[TCPT_KEEP] = TCPTV_KEEP_INIT*2; | |
619 | ||
620 | so->so_state &= SS_PERSISTENT_MASK; | |
621 | so->so_state |= (SS_FACCEPTCONN | flags); | |
622 | so->so_lport = lport; /* Kept in network format */ | |
623 | so->so_laddr.s_addr = laddr; /* Ditto */ | |
624 | ||
625 | addr.sin_family = AF_INET; | |
626 | addr.sin_addr.s_addr = haddr; | |
627 | addr.sin_port = hport; | |
628 | ||
629 | if (((s = qemu_socket(AF_INET,SOCK_STREAM,0)) < 0) || | |
630 | (setsockopt(s,SOL_SOCKET,SO_REUSEADDR,(char *)&opt,sizeof(int)) < 0) || | |
631 | (bind(s,(struct sockaddr *)&addr, sizeof(addr)) < 0) || | |
632 | (listen(s,1) < 0)) { | |
633 | int tmperrno = errno; /* Don't clobber the real reason we failed */ | |
634 | ||
635 | close(s); | |
636 | sofree(so); | |
637 | /* Restore the real errno */ | |
638 | #ifdef _WIN32 | |
639 | WSASetLastError(tmperrno); | |
640 | #else | |
641 | errno = tmperrno; | |
642 | #endif | |
643 | return NULL; | |
644 | } | |
645 | setsockopt(s,SOL_SOCKET,SO_OOBINLINE,(char *)&opt,sizeof(int)); | |
646 | ||
647 | getsockname(s,(struct sockaddr *)&addr,&addrlen); | |
648 | so->so_fport = addr.sin_port; | |
649 | if (addr.sin_addr.s_addr == 0 || addr.sin_addr.s_addr == loopback_addr.s_addr) | |
650 | so->so_faddr = slirp->vhost_addr; | |
651 | else | |
652 | so->so_faddr = addr.sin_addr; | |
653 | ||
654 | so->s = s; | |
655 | return so; | |
656 | } | |
657 | ||
658 | /* | |
659 | * Various session state calls | |
660 | * XXX Should be #define's | |
661 | * The socket state stuff needs work, these often get call 2 or 3 | |
662 | * times each when only 1 was needed | |
663 | */ | |
664 | void | |
665 | soisfconnecting(struct socket *so) | |
666 | { | |
667 | so->so_state &= ~(SS_NOFDREF|SS_ISFCONNECTED|SS_FCANTRCVMORE| | |
668 | SS_FCANTSENDMORE|SS_FWDRAIN); | |
669 | so->so_state |= SS_ISFCONNECTING; /* Clobber other states */ | |
670 | } | |
671 | ||
672 | void | |
673 | soisfconnected(struct socket *so) | |
674 | { | |
675 | so->so_state &= ~(SS_ISFCONNECTING|SS_FWDRAIN|SS_NOFDREF); | |
676 | so->so_state |= SS_ISFCONNECTED; /* Clobber other states */ | |
677 | } | |
678 | ||
679 | static void | |
680 | sofcantrcvmore(struct socket *so) | |
681 | { | |
682 | if ((so->so_state & SS_NOFDREF) == 0) { | |
683 | shutdown(so->s,0); | |
684 | if(global_writefds) { | |
685 | FD_CLR(so->s,global_writefds); | |
686 | } | |
687 | } | |
688 | so->so_state &= ~(SS_ISFCONNECTING); | |
689 | if (so->so_state & SS_FCANTSENDMORE) { | |
690 | so->so_state &= SS_PERSISTENT_MASK; | |
691 | so->so_state |= SS_NOFDREF; /* Don't select it */ | |
692 | } else { | |
693 | so->so_state |= SS_FCANTRCVMORE; | |
694 | } | |
695 | } | |
696 | ||
697 | static void | |
698 | sofcantsendmore(struct socket *so) | |
699 | { | |
700 | if ((so->so_state & SS_NOFDREF) == 0) { | |
701 | shutdown(so->s,1); /* send FIN to fhost */ | |
702 | if (global_readfds) { | |
703 | FD_CLR(so->s,global_readfds); | |
704 | } | |
705 | if (global_xfds) { | |
706 | FD_CLR(so->s,global_xfds); | |
707 | } | |
708 | } | |
709 | so->so_state &= ~(SS_ISFCONNECTING); | |
710 | if (so->so_state & SS_FCANTRCVMORE) { | |
711 | so->so_state &= SS_PERSISTENT_MASK; | |
712 | so->so_state |= SS_NOFDREF; /* as above */ | |
713 | } else { | |
714 | so->so_state |= SS_FCANTSENDMORE; | |
715 | } | |
716 | } | |
717 | ||
718 | /* | |
719 | * Set write drain mode | |
720 | * Set CANTSENDMORE once all data has been write()n | |
721 | */ | |
722 | void | |
723 | sofwdrain(struct socket *so) | |
724 | { | |
725 | if (so->so_rcv.sb_cc) | |
726 | so->so_state |= SS_FWDRAIN; | |
727 | else | |
728 | sofcantsendmore(so); | |
729 | } |