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Commit | Line | Data |
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f0cbd3ec FB |
1 | /* |
2 | * Copyright (c) 1982, 1986, 1988, 1990, 1993 | |
3 | * The Regents of the University of California. All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * 2. Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in the | |
12 | * documentation and/or other materials provided with the distribution. | |
2f5f8996 | 13 | * 3. Neither the name of the University nor the names of its contributors |
f0cbd3ec FB |
14 | * may be used to endorse or promote products derived from this software |
15 | * without specific prior written permission. | |
16 | * | |
17 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
27 | * SUCH DAMAGE. | |
28 | * | |
29 | * @(#)tcp_subr.c 8.1 (Berkeley) 6/10/93 | |
30 | * tcp_subr.c,v 1.5 1994/10/08 22:39:58 phk Exp | |
31 | */ | |
32 | ||
33 | /* | |
34 | * Changes and additions relating to SLiRP | |
35 | * Copyright (c) 1995 Danny Gasparovski. | |
5fafdf24 TS |
36 | * |
37 | * Please read the file COPYRIGHT for the | |
f0cbd3ec FB |
38 | * terms and conditions of the copyright. |
39 | */ | |
40 | ||
7df7482b | 41 | #include "qemu/osdep.h" |
f0cbd3ec FB |
42 | #include <slirp.h> |
43 | ||
44 | /* patchable/settable parameters for tcp */ | |
9634d903 BS |
45 | /* Don't do rfc1323 performance enhancements */ |
46 | #define TCP_DO_RFC1323 0 | |
f0cbd3ec FB |
47 | |
48 | /* | |
49 | * Tcp initialization | |
50 | */ | |
51 | void | |
460fec67 | 52 | tcp_init(Slirp *slirp) |
f0cbd3ec | 53 | { |
460fec67 JK |
54 | slirp->tcp_iss = 1; /* wrong */ |
55 | slirp->tcb.so_next = slirp->tcb.so_prev = &slirp->tcb; | |
56 | slirp->tcp_last_so = &slirp->tcb; | |
f0cbd3ec FB |
57 | } |
58 | ||
a68adc22 JK |
59 | void tcp_cleanup(Slirp *slirp) |
60 | { | |
61 | while (slirp->tcb.so_next != &slirp->tcb) { | |
62 | tcp_close(sototcpcb(slirp->tcb.so_next)); | |
63 | } | |
64 | } | |
65 | ||
f0cbd3ec FB |
66 | /* |
67 | * Create template to be used to send tcp packets on a connection. | |
68 | * Call after host entry created, fills | |
69 | * in a skeletal tcp/ip header, minimizing the amount of work | |
70 | * necessary when the connection is used. | |
71 | */ | |
f0cbd3ec | 72 | void |
511d2b14 | 73 | tcp_template(struct tcpcb *tp) |
f0cbd3ec FB |
74 | { |
75 | struct socket *so = tp->t_socket; | |
76 | register struct tcpiphdr *n = &tp->t_template; | |
77 | ||
429d0a3d | 78 | n->ti_mbuf = NULL; |
98c63057 GS |
79 | memset(&n->ti, 0, sizeof(n->ti)); |
80 | n->ti_x0 = 0; | |
9dfbf250 GS |
81 | switch (so->so_ffamily) { |
82 | case AF_INET: | |
1252cf40 GS |
83 | n->ti_pr = IPPROTO_TCP; |
84 | n->ti_len = htons(sizeof(struct tcphdr)); | |
85 | n->ti_src = so->so_faddr; | |
86 | n->ti_dst = so->so_laddr; | |
87 | n->ti_sport = so->so_fport; | |
88 | n->ti_dport = so->so_lport; | |
9dfbf250 GS |
89 | break; |
90 | ||
91 | default: | |
92 | g_assert_not_reached(); | |
93 | } | |
5fafdf24 | 94 | |
f0cbd3ec FB |
95 | n->ti_seq = 0; |
96 | n->ti_ack = 0; | |
97 | n->ti_x2 = 0; | |
98 | n->ti_off = 5; | |
99 | n->ti_flags = 0; | |
100 | n->ti_win = 0; | |
101 | n->ti_sum = 0; | |
102 | n->ti_urp = 0; | |
103 | } | |
104 | ||
105 | /* | |
106 | * Send a single message to the TCP at address specified by | |
107 | * the given TCP/IP header. If m == 0, then we make a copy | |
108 | * of the tcpiphdr at ti and send directly to the addressed host. | |
109 | * This is used to force keep alive messages out using the TCP | |
110 | * template for a connection tp->t_template. If flags are given | |
111 | * then we send a message back to the TCP which originated the | |
112 | * segment ti, and discard the mbuf containing it and any other | |
113 | * attached mbufs. | |
114 | * | |
115 | * In any case the ack and sequence number of the transmitted | |
116 | * segment are as specified by the parameters. | |
117 | */ | |
118 | void | |
511d2b14 | 119 | tcp_respond(struct tcpcb *tp, struct tcpiphdr *ti, struct mbuf *m, |
9dfbf250 | 120 | tcp_seq ack, tcp_seq seq, int flags, unsigned short af) |
f0cbd3ec FB |
121 | { |
122 | register int tlen; | |
123 | int win = 0; | |
124 | ||
125 | DEBUG_CALL("tcp_respond"); | |
c4d12a74 SW |
126 | DEBUG_ARG("tp = %p", tp); |
127 | DEBUG_ARG("ti = %p", ti); | |
128 | DEBUG_ARG("m = %p", m); | |
f0cbd3ec FB |
129 | DEBUG_ARG("ack = %u", ack); |
130 | DEBUG_ARG("seq = %u", seq); | |
131 | DEBUG_ARG("flags = %x", flags); | |
5fafdf24 | 132 | |
f0cbd3ec FB |
133 | if (tp) |
134 | win = sbspace(&tp->t_socket->so_rcv); | |
511d2b14 | 135 | if (m == NULL) { |
e56afbc5 | 136 | if (!tp || (m = m_get(tp->t_socket->slirp)) == NULL) |
f0cbd3ec | 137 | return; |
f0cbd3ec | 138 | tlen = 0; |
9634d903 | 139 | m->m_data += IF_MAXLINKHDR; |
f0cbd3ec FB |
140 | *mtod(m, struct tcpiphdr *) = *ti; |
141 | ti = mtod(m, struct tcpiphdr *); | |
98c63057 | 142 | memset(&ti->ti, 0, sizeof(ti->ti)); |
f0cbd3ec FB |
143 | flags = TH_ACK; |
144 | } else { | |
5fafdf24 | 145 | /* |
f0cbd3ec FB |
146 | * ti points into m so the next line is just making |
147 | * the mbuf point to ti | |
148 | */ | |
149 | m->m_data = (caddr_t)ti; | |
3b46e624 | 150 | |
f0cbd3ec FB |
151 | m->m_len = sizeof (struct tcpiphdr); |
152 | tlen = 0; | |
153 | #define xchg(a,b,type) { type t; t=a; a=b; b=t; } | |
9dfbf250 GS |
154 | switch (af) { |
155 | case AF_INET: | |
1252cf40 GS |
156 | xchg(ti->ti_dst.s_addr, ti->ti_src.s_addr, uint32_t); |
157 | xchg(ti->ti_dport, ti->ti_sport, uint16_t); | |
9dfbf250 GS |
158 | break; |
159 | default: | |
160 | g_assert_not_reached(); | |
161 | } | |
f0cbd3ec FB |
162 | #undef xchg |
163 | } | |
164 | ti->ti_len = htons((u_short)(sizeof (struct tcphdr) + tlen)); | |
165 | tlen += sizeof (struct tcpiphdr); | |
166 | m->m_len = tlen; | |
167 | ||
98c63057 GS |
168 | ti->ti_mbuf = NULL; |
169 | ti->ti_x0 = 0; | |
f0cbd3ec FB |
170 | ti->ti_seq = htonl(seq); |
171 | ti->ti_ack = htonl(ack); | |
172 | ti->ti_x2 = 0; | |
173 | ti->ti_off = sizeof (struct tcphdr) >> 2; | |
174 | ti->ti_flags = flags; | |
175 | if (tp) | |
b6dce92e | 176 | ti->ti_win = htons((uint16_t) (win >> tp->rcv_scale)); |
f0cbd3ec | 177 | else |
b6dce92e | 178 | ti->ti_win = htons((uint16_t)win); |
f0cbd3ec FB |
179 | ti->ti_urp = 0; |
180 | ti->ti_sum = 0; | |
181 | ti->ti_sum = cksum(m, tlen); | |
f0cbd3ec | 182 | |
98c63057 | 183 | struct tcpiphdr tcpiph_save = *(mtod(m, struct tcpiphdr *)); |
9dfbf250 GS |
184 | struct ip *ip; |
185 | ||
186 | switch (af) { | |
187 | case AF_INET: | |
1252cf40 GS |
188 | m->m_data += sizeof(struct tcpiphdr) - sizeof(struct tcphdr) |
189 | - sizeof(struct ip); | |
190 | m->m_len -= sizeof(struct tcpiphdr) - sizeof(struct tcphdr) | |
191 | - sizeof(struct ip); | |
192 | ip = mtod(m, struct ip *); | |
193 | ip->ip_len = tlen; | |
194 | ip->ip_dst = tcpiph_save.ti_dst; | |
195 | ip->ip_src = tcpiph_save.ti_src; | |
196 | ip->ip_p = tcpiph_save.ti_pr; | |
197 | ||
198 | if (flags & TH_RST) { | |
199 | ip->ip_ttl = MAXTTL; | |
200 | } else { | |
201 | ip->ip_ttl = IPDEFTTL; | |
202 | } | |
203 | ||
204 | (void) ip_output((struct socket *)0, m); | |
9dfbf250 GS |
205 | break; |
206 | ||
207 | default: | |
208 | g_assert_not_reached(); | |
209 | } | |
f0cbd3ec FB |
210 | } |
211 | ||
212 | /* | |
213 | * Create a new TCP control block, making an | |
214 | * empty reassembly queue and hooking it to the argument | |
215 | * protocol control block. | |
216 | */ | |
217 | struct tcpcb * | |
511d2b14 | 218 | tcp_newtcpcb(struct socket *so) |
f0cbd3ec FB |
219 | { |
220 | register struct tcpcb *tp; | |
5fafdf24 | 221 | |
f0cbd3ec FB |
222 | tp = (struct tcpcb *)malloc(sizeof(*tp)); |
223 | if (tp == NULL) | |
224 | return ((struct tcpcb *)0); | |
5fafdf24 | 225 | |
f0cbd3ec | 226 | memset((char *) tp, 0, sizeof(struct tcpcb)); |
429d0a3d | 227 | tp->seg_next = tp->seg_prev = (struct tcpiphdr*)tp; |
9634d903 | 228 | tp->t_maxseg = TCP_MSS; |
5fafdf24 | 229 | |
9634d903 | 230 | tp->t_flags = TCP_DO_RFC1323 ? (TF_REQ_SCALE|TF_REQ_TSTMP) : 0; |
f0cbd3ec | 231 | tp->t_socket = so; |
5fafdf24 | 232 | |
f0cbd3ec FB |
233 | /* |
234 | * Init srtt to TCPTV_SRTTBASE (0), so we can tell that we have no | |
235 | * rtt estimate. Set rttvar so that srtt + 2 * rttvar gives | |
236 | * reasonable initial retransmit time. | |
237 | */ | |
238 | tp->t_srtt = TCPTV_SRTTBASE; | |
9634d903 | 239 | tp->t_rttvar = TCPTV_SRTTDFLT << 2; |
f0cbd3ec FB |
240 | tp->t_rttmin = TCPTV_MIN; |
241 | ||
5fafdf24 | 242 | TCPT_RANGESET(tp->t_rxtcur, |
f0cbd3ec FB |
243 | ((TCPTV_SRTTBASE >> 2) + (TCPTV_SRTTDFLT << 2)) >> 1, |
244 | TCPTV_MIN, TCPTV_REXMTMAX); | |
245 | ||
246 | tp->snd_cwnd = TCP_MAXWIN << TCP_MAX_WINSHIFT; | |
247 | tp->snd_ssthresh = TCP_MAXWIN << TCP_MAX_WINSHIFT; | |
248 | tp->t_state = TCPS_CLOSED; | |
5fafdf24 | 249 | |
f0cbd3ec FB |
250 | so->so_tcpcb = tp; |
251 | ||
252 | return (tp); | |
253 | } | |
254 | ||
255 | /* | |
256 | * Drop a TCP connection, reporting | |
257 | * the specified error. If connection is synchronized, | |
258 | * then send a RST to peer. | |
259 | */ | |
5fafdf24 | 260 | struct tcpcb *tcp_drop(struct tcpcb *tp, int err) |
f0cbd3ec | 261 | { |
f0cbd3ec | 262 | DEBUG_CALL("tcp_drop"); |
ecc804ca | 263 | DEBUG_ARG("tp = %p", tp); |
f0cbd3ec | 264 | DEBUG_ARG("errno = %d", errno); |
5fafdf24 | 265 | |
f0cbd3ec FB |
266 | if (TCPS_HAVERCVDSYN(tp->t_state)) { |
267 | tp->t_state = TCPS_CLOSED; | |
268 | (void) tcp_output(tp); | |
0fe6a7f2 | 269 | } |
f0cbd3ec FB |
270 | return (tcp_close(tp)); |
271 | } | |
272 | ||
273 | /* | |
274 | * Close a TCP control block: | |
275 | * discard all space held by the tcp | |
276 | * discard internet protocol block | |
277 | * wake up any sleepers | |
278 | */ | |
279 | struct tcpcb * | |
511d2b14 | 280 | tcp_close(struct tcpcb *tp) |
f0cbd3ec FB |
281 | { |
282 | register struct tcpiphdr *t; | |
283 | struct socket *so = tp->t_socket; | |
460fec67 | 284 | Slirp *slirp = so->slirp; |
f0cbd3ec FB |
285 | register struct mbuf *m; |
286 | ||
287 | DEBUG_CALL("tcp_close"); | |
ecc804ca | 288 | DEBUG_ARG("tp = %p", tp); |
5fafdf24 | 289 | |
f0cbd3ec | 290 | /* free the reassembly queue, if any */ |
429d0a3d BS |
291 | t = tcpfrag_list_first(tp); |
292 | while (!tcpfrag_list_end(t, tp)) { | |
293 | t = tcpiphdr_next(t); | |
294 | m = tcpiphdr_prev(t)->ti_mbuf; | |
295 | remque(tcpiphdr2qlink(tcpiphdr_prev(t))); | |
3acccfc6 | 296 | m_free(m); |
f0cbd3ec | 297 | } |
f0cbd3ec | 298 | free(tp); |
511d2b14 | 299 | so->so_tcpcb = NULL; |
f0cbd3ec | 300 | /* clobber input socket cache if we're closing the cached connection */ |
460fec67 JK |
301 | if (so == slirp->tcp_last_so) |
302 | slirp->tcp_last_so = &slirp->tcb; | |
379ff53d | 303 | closesocket(so->s); |
f0cbd3ec FB |
304 | sbfree(&so->so_rcv); |
305 | sbfree(&so->so_snd); | |
306 | sofree(so); | |
f0cbd3ec FB |
307 | return ((struct tcpcb *)0); |
308 | } | |
309 | ||
f0cbd3ec FB |
310 | /* |
311 | * TCP protocol interface to socket abstraction. | |
312 | */ | |
313 | ||
314 | /* | |
315 | * User issued close, and wish to trail through shutdown states: | |
316 | * if never received SYN, just forget it. If got a SYN from peer, | |
317 | * but haven't sent FIN, then go to FIN_WAIT_1 state to send peer a FIN. | |
318 | * If already got a FIN from peer, then almost done; go to LAST_ACK | |
319 | * state. In all other cases, have already sent FIN to peer (e.g. | |
320 | * after PRU_SHUTDOWN), and just have to play tedious game waiting | |
321 | * for peer to send FIN or not respond to keep-alives, etc. | |
322 | * We can let the user exit from the close as soon as the FIN is acked. | |
323 | */ | |
324 | void | |
511d2b14 | 325 | tcp_sockclosed(struct tcpcb *tp) |
f0cbd3ec FB |
326 | { |
327 | ||
328 | DEBUG_CALL("tcp_sockclosed"); | |
ecc804ca | 329 | DEBUG_ARG("tp = %p", tp); |
5fafdf24 | 330 | |
f0cbd3ec FB |
331 | switch (tp->t_state) { |
332 | ||
333 | case TCPS_CLOSED: | |
334 | case TCPS_LISTEN: | |
335 | case TCPS_SYN_SENT: | |
336 | tp->t_state = TCPS_CLOSED; | |
337 | tp = tcp_close(tp); | |
338 | break; | |
339 | ||
340 | case TCPS_SYN_RECEIVED: | |
341 | case TCPS_ESTABLISHED: | |
342 | tp->t_state = TCPS_FIN_WAIT_1; | |
343 | break; | |
344 | ||
345 | case TCPS_CLOSE_WAIT: | |
346 | tp->t_state = TCPS_LAST_ACK; | |
347 | break; | |
348 | } | |
f0cbd3ec FB |
349 | if (tp) |
350 | tcp_output(tp); | |
351 | } | |
352 | ||
5fafdf24 | 353 | /* |
f0cbd3ec FB |
354 | * Connect to a host on the Internet |
355 | * Called by tcp_input | |
356 | * Only do a connect, the tcp fields will be set in tcp_input | |
357 | * return 0 if there's a result of the connect, | |
358 | * else return -1 means we're still connecting | |
359 | * The return value is almost always -1 since the socket is | |
5fafdf24 | 360 | * nonblocking. Connect returns after the SYN is sent, and does |
f0cbd3ec FB |
361 | * not wait for ACK+SYN. |
362 | */ | |
cc573a69 | 363 | int tcp_fconnect(struct socket *so, unsigned short af) |
f0cbd3ec FB |
364 | { |
365 | int ret=0; | |
3b46e624 | 366 | |
f0cbd3ec | 367 | DEBUG_CALL("tcp_fconnect"); |
ecc804ca | 368 | DEBUG_ARG("so = %p", so); |
f0cbd3ec | 369 | |
cc573a69 GS |
370 | ret = so->s = qemu_socket(af, SOCK_STREAM, 0); |
371 | if (ret >= 0) { | |
f0cbd3ec | 372 | int opt, s=so->s; |
5379229a | 373 | struct sockaddr_storage addr; |
f0cbd3ec | 374 | |
f9e8cacc | 375 | qemu_set_nonblock(s); |
aad1239a | 376 | socket_set_fast_reuse(s); |
f0cbd3ec | 377 | opt = 1; |
9957fc7f | 378 | qemu_setsockopt(s, SOL_SOCKET, SO_OOBINLINE, &opt, sizeof(opt)); |
3b46e624 | 379 | |
5379229a GS |
380 | addr = so->fhost.ss; |
381 | DEBUG_CALL(" connect()ing") | |
382 | sotranslate_out(so, &addr); | |
383 | ||
f0cbd3ec FB |
384 | /* We don't care what port we get */ |
385 | ret = connect(s,(struct sockaddr *)&addr,sizeof (addr)); | |
3b46e624 | 386 | |
f0cbd3ec FB |
387 | /* |
388 | * If it's not in progress, it failed, so we just return 0, | |
389 | * without clearing SS_NOFDREF | |
390 | */ | |
391 | soisfconnecting(so); | |
392 | } | |
393 | ||
394 | return(ret); | |
395 | } | |
396 | ||
397 | /* | |
398 | * Accept the socket and connect to the local-host | |
5fafdf24 | 399 | * |
f0cbd3ec FB |
400 | * We have a problem. The correct thing to do would be |
401 | * to first connect to the local-host, and only if the | |
402 | * connection is accepted, then do an accept() here. | |
5fafdf24 | 403 | * But, a) we need to know who's trying to connect |
f0cbd3ec FB |
404 | * to the socket to be able to SYN the local-host, and |
405 | * b) we are already connected to the foreign host by | |
406 | * the time it gets to accept(), so... We simply accept | |
407 | * here and SYN the local-host. | |
5fafdf24 | 408 | */ |
4ef7b894 | 409 | void tcp_connect(struct socket *inso) |
f0cbd3ec | 410 | { |
4ef7b894 MK |
411 | Slirp *slirp = inso->slirp; |
412 | struct socket *so; | |
9dfbf250 GS |
413 | struct sockaddr_storage addr; |
414 | socklen_t addrlen = sizeof(struct sockaddr_storage); | |
4ef7b894 MK |
415 | struct tcpcb *tp; |
416 | int s, opt; | |
f0cbd3ec | 417 | |
4ef7b894 | 418 | DEBUG_CALL("tcp_connect"); |
ecc804ca | 419 | DEBUG_ARG("inso = %p", inso); |
5fafdf24 | 420 | |
4ef7b894 MK |
421 | /* |
422 | * If it's an SS_ACCEPTONCE socket, no need to socreate() | |
423 | * another socket, just use the accept() socket. | |
424 | */ | |
425 | if (inso->so_state & SS_FACCEPTONCE) { | |
426 | /* FACCEPTONCE already have a tcpcb */ | |
427 | so = inso; | |
428 | } else { | |
429 | so = socreate(slirp); | |
430 | if (so == NULL) { | |
431 | /* If it failed, get rid of the pending connection */ | |
432 | closesocket(accept(inso->s, (struct sockaddr *)&addr, &addrlen)); | |
433 | return; | |
434 | } | |
435 | if (tcp_attach(so) < 0) { | |
436 | free(so); /* NOT sofree */ | |
437 | return; | |
438 | } | |
9dfbf250 GS |
439 | so->lhost = inso->lhost; |
440 | so->so_ffamily = inso->so_ffamily; | |
4ef7b894 | 441 | } |
5fafdf24 | 442 | |
4ef7b894 | 443 | tcp_mss(sototcpcb(so), 0); |
f0cbd3ec | 444 | |
4ef7b894 MK |
445 | s = accept(inso->s, (struct sockaddr *)&addr, &addrlen); |
446 | if (s < 0) { | |
447 | tcp_close(sototcpcb(so)); /* This will sofree() as well */ | |
448 | return; | |
449 | } | |
f9e8cacc | 450 | qemu_set_nonblock(s); |
aad1239a | 451 | socket_set_fast_reuse(s); |
4ef7b894 | 452 | opt = 1; |
9957fc7f | 453 | qemu_setsockopt(s, SOL_SOCKET, SO_OOBINLINE, &opt, sizeof(int)); |
bf1c852a | 454 | socket_set_nodelay(s); |
4ef7b894 | 455 | |
9dfbf250 | 456 | so->fhost.ss = addr; |
5379229a | 457 | sotranslate_accept(so); |
5fafdf24 | 458 | |
4ef7b894 MK |
459 | /* Close the accept() socket, set right state */ |
460 | if (inso->so_state & SS_FACCEPTONCE) { | |
461 | /* If we only accept once, close the accept() socket */ | |
462 | closesocket(so->s); | |
463 | ||
464 | /* Don't select it yet, even though we have an FD */ | |
465 | /* if it's not FACCEPTONCE, it's already NOFDREF */ | |
466 | so->so_state = SS_NOFDREF; | |
467 | } | |
468 | so->s = s; | |
469 | so->so_state |= SS_INCOMING; | |
5fafdf24 | 470 | |
4ef7b894 MK |
471 | so->so_iptos = tcp_tos(so); |
472 | tp = sototcpcb(so); | |
f0cbd3ec | 473 | |
4ef7b894 | 474 | tcp_template(tp); |
5fafdf24 | 475 | |
4ef7b894 MK |
476 | tp->t_state = TCPS_SYN_SENT; |
477 | tp->t_timer[TCPT_KEEP] = TCPTV_KEEP_INIT; | |
478 | tp->iss = slirp->tcp_iss; | |
479 | slirp->tcp_iss += TCP_ISSINCR/2; | |
480 | tcp_sendseqinit(tp); | |
481 | tcp_output(tp); | |
f0cbd3ec FB |
482 | } |
483 | ||
484 | /* | |
485 | * Attach a TCPCB to a socket. | |
486 | */ | |
487 | int | |
511d2b14 | 488 | tcp_attach(struct socket *so) |
f0cbd3ec FB |
489 | { |
490 | if ((so->so_tcpcb = tcp_newtcpcb(so)) == NULL) | |
491 | return -1; | |
5fafdf24 | 492 | |
460fec67 | 493 | insque(so, &so->slirp->tcb); |
f0cbd3ec FB |
494 | |
495 | return 0; | |
496 | } | |
497 | ||
498 | /* | |
499 | * Set the socket's type of service field | |
500 | */ | |
9634d903 | 501 | static const struct tos_t tcptos[] = { |
f0cbd3ec FB |
502 | {0, 20, IPTOS_THROUGHPUT, 0}, /* ftp data */ |
503 | {21, 21, IPTOS_LOWDELAY, EMU_FTP}, /* ftp control */ | |
504 | {0, 23, IPTOS_LOWDELAY, 0}, /* telnet */ | |
505 | {0, 80, IPTOS_THROUGHPUT, 0}, /* WWW */ | |
506 | {0, 513, IPTOS_LOWDELAY, EMU_RLOGIN|EMU_NOCONNECT}, /* rlogin */ | |
507 | {0, 514, IPTOS_LOWDELAY, EMU_RSH|EMU_NOCONNECT}, /* shell */ | |
508 | {0, 544, IPTOS_LOWDELAY, EMU_KSH}, /* kshell */ | |
509 | {0, 543, IPTOS_LOWDELAY, 0}, /* klogin */ | |
510 | {0, 6667, IPTOS_THROUGHPUT, EMU_IRC}, /* IRC */ | |
511 | {0, 6668, IPTOS_THROUGHPUT, EMU_IRC}, /* IRC undernet */ | |
512 | {0, 7070, IPTOS_LOWDELAY, EMU_REALAUDIO }, /* RealAudio control */ | |
513 | {0, 113, IPTOS_LOWDELAY, EMU_IDENT }, /* identd protocol */ | |
514 | {0, 0, 0, 0} | |
515 | }; | |
516 | ||
0d62c4cf | 517 | static struct emu_t *tcpemu = NULL; |
3b46e624 | 518 | |
f0cbd3ec FB |
519 | /* |
520 | * Return TOS according to the above table | |
521 | */ | |
b6dce92e | 522 | uint8_t |
511d2b14 | 523 | tcp_tos(struct socket *so) |
f0cbd3ec FB |
524 | { |
525 | int i = 0; | |
526 | struct emu_t *emup; | |
5fafdf24 | 527 | |
f0cbd3ec FB |
528 | while(tcptos[i].tos) { |
529 | if ((tcptos[i].fport && (ntohs(so->so_fport) == tcptos[i].fport)) || | |
530 | (tcptos[i].lport && (ntohs(so->so_lport) == tcptos[i].lport))) { | |
531 | so->so_emu = tcptos[i].emu; | |
532 | return tcptos[i].tos; | |
533 | } | |
534 | i++; | |
535 | } | |
5fafdf24 | 536 | |
f0cbd3ec FB |
537 | /* Nope, lets see if there's a user-added one */ |
538 | for (emup = tcpemu; emup; emup = emup->next) { | |
539 | if ((emup->fport && (ntohs(so->so_fport) == emup->fport)) || | |
540 | (emup->lport && (ntohs(so->so_lport) == emup->lport))) { | |
541 | so->so_emu = emup->emu; | |
542 | return emup->tos; | |
543 | } | |
544 | } | |
5fafdf24 | 545 | |
f0cbd3ec FB |
546 | return 0; |
547 | } | |
548 | ||
f0cbd3ec FB |
549 | /* |
550 | * Emulate programs that try and connect to us | |
551 | * This includes ftp (the data connection is | |
552 | * initiated by the server) and IRC (DCC CHAT and | |
553 | * DCC SEND) for now | |
5fafdf24 | 554 | * |
f0cbd3ec FB |
555 | * NOTE: It's possible to crash SLiRP by sending it |
556 | * unstandard strings to emulate... if this is a problem, | |
557 | * more checks are needed here | |
558 | * | |
559 | * XXX Assumes the whole command came in one packet | |
3b46e624 | 560 | * |
f0cbd3ec FB |
561 | * XXX Some ftp clients will have their TOS set to |
562 | * LOWDELAY and so Nagel will kick in. Because of this, | |
563 | * we'll get the first letter, followed by the rest, so | |
564 | * we simply scan for ORT instead of PORT... | |
565 | * DCC doesn't have this problem because there's other stuff | |
566 | * in the packet before the DCC command. | |
5fafdf24 TS |
567 | * |
568 | * Return 1 if the mbuf m is still valid and should be | |
f0cbd3ec | 569 | * sbappend()ed |
5fafdf24 | 570 | * |
f0cbd3ec FB |
571 | * NOTE: if you return 0 you MUST m_free() the mbuf! |
572 | */ | |
573 | int | |
511d2b14 | 574 | tcp_emu(struct socket *so, struct mbuf *m) |
f0cbd3ec | 575 | { |
460fec67 | 576 | Slirp *slirp = so->slirp; |
f0cbd3ec | 577 | u_int n1, n2, n3, n4, n5, n6; |
363a37d5 | 578 | char buff[257]; |
b6dce92e | 579 | uint32_t laddr; |
f0cbd3ec FB |
580 | u_int lport; |
581 | char *bptr; | |
5fafdf24 | 582 | |
f0cbd3ec | 583 | DEBUG_CALL("tcp_emu"); |
ecc804ca SW |
584 | DEBUG_ARG("so = %p", so); |
585 | DEBUG_ARG("m = %p", m); | |
5fafdf24 | 586 | |
f0cbd3ec FB |
587 | switch(so->so_emu) { |
588 | int x, i; | |
3b46e624 | 589 | |
f0cbd3ec FB |
590 | case EMU_IDENT: |
591 | /* | |
592 | * Identification protocol as per rfc-1413 | |
593 | */ | |
3b46e624 | 594 | |
f0cbd3ec FB |
595 | { |
596 | struct socket *tmpso; | |
597 | struct sockaddr_in addr; | |
b55266b5 | 598 | socklen_t addrlen = sizeof(struct sockaddr_in); |
f0cbd3ec | 599 | struct sbuf *so_rcv = &so->so_rcv; |
3b46e624 | 600 | |
f0cbd3ec FB |
601 | memcpy(so_rcv->sb_wptr, m->m_data, m->m_len); |
602 | so_rcv->sb_wptr += m->m_len; | |
603 | so_rcv->sb_rptr += m->m_len; | |
604 | m->m_data[m->m_len] = 0; /* NULL terminate */ | |
605 | if (strchr(m->m_data, '\r') || strchr(m->m_data, '\n')) { | |
9634d903 | 606 | if (sscanf(so_rcv->sb_data, "%u%*[ ,]%u", &n1, &n2) == 2) { |
f0cbd3ec FB |
607 | HTONS(n1); |
608 | HTONS(n2); | |
609 | /* n2 is the one on our host */ | |
460fec67 JK |
610 | for (tmpso = slirp->tcb.so_next; |
611 | tmpso != &slirp->tcb; | |
612 | tmpso = tmpso->so_next) { | |
f0cbd3ec FB |
613 | if (tmpso->so_laddr.s_addr == so->so_laddr.s_addr && |
614 | tmpso->so_lport == n2 && | |
615 | tmpso->so_faddr.s_addr == so->so_faddr.s_addr && | |
616 | tmpso->so_fport == n1) { | |
617 | if (getsockname(tmpso->s, | |
618 | (struct sockaddr *)&addr, &addrlen) == 0) | |
619 | n2 = ntohs(addr.sin_port); | |
620 | break; | |
621 | } | |
622 | } | |
623 | } | |
363a37d5 BS |
624 | so_rcv->sb_cc = snprintf(so_rcv->sb_data, |
625 | so_rcv->sb_datalen, | |
626 | "%d,%d\r\n", n1, n2); | |
f0cbd3ec FB |
627 | so_rcv->sb_rptr = so_rcv->sb_data; |
628 | so_rcv->sb_wptr = so_rcv->sb_data + so_rcv->sb_cc; | |
629 | } | |
630 | m_free(m); | |
631 | return 0; | |
632 | } | |
3b46e624 | 633 | |
f0cbd3ec | 634 | case EMU_FTP: /* ftp */ |
511d2b14 | 635 | *(m->m_data+m->m_len) = 0; /* NUL terminate for strstr */ |
f0cbd3ec FB |
636 | if ((bptr = (char *)strstr(m->m_data, "ORT")) != NULL) { |
637 | /* | |
638 | * Need to emulate the PORT command | |
3b46e624 | 639 | */ |
9634d903 | 640 | x = sscanf(bptr, "ORT %u,%u,%u,%u,%u,%u\r\n%256[^\177]", |
f0cbd3ec FB |
641 | &n1, &n2, &n3, &n4, &n5, &n6, buff); |
642 | if (x < 6) | |
643 | return 1; | |
3b46e624 | 644 | |
f0cbd3ec FB |
645 | laddr = htonl((n1 << 24) | (n2 << 16) | (n3 << 8) | (n4)); |
646 | lport = htons((n5 << 8) | (n6)); | |
3b46e624 | 647 | |
460fec67 JK |
648 | if ((so = tcp_listen(slirp, INADDR_ANY, 0, laddr, |
649 | lport, SS_FACCEPTONCE)) == NULL) { | |
f0cbd3ec | 650 | return 1; |
460fec67 | 651 | } |
f0cbd3ec | 652 | n6 = ntohs(so->so_fport); |
3b46e624 | 653 | |
f0cbd3ec FB |
654 | n5 = (n6 >> 8) & 0xff; |
655 | n6 &= 0xff; | |
3b46e624 | 656 | |
f0cbd3ec | 657 | laddr = ntohl(so->so_faddr.s_addr); |
3b46e624 | 658 | |
f0cbd3ec FB |
659 | n1 = ((laddr >> 24) & 0xff); |
660 | n2 = ((laddr >> 16) & 0xff); | |
661 | n3 = ((laddr >> 8) & 0xff); | |
662 | n4 = (laddr & 0xff); | |
3b46e624 | 663 | |
f0cbd3ec | 664 | m->m_len = bptr - m->m_data; /* Adjust length */ |
0e44486c | 665 | m->m_len += snprintf(bptr, m->m_size - m->m_len, |
363a37d5 BS |
666 | "ORT %d,%d,%d,%d,%d,%d\r\n%s", |
667 | n1, n2, n3, n4, n5, n6, x==7?buff:""); | |
f0cbd3ec FB |
668 | return 1; |
669 | } else if ((bptr = (char *)strstr(m->m_data, "27 Entering")) != NULL) { | |
670 | /* | |
671 | * Need to emulate the PASV response | |
672 | */ | |
9634d903 | 673 | x = sscanf(bptr, "27 Entering Passive Mode (%u,%u,%u,%u,%u,%u)\r\n%256[^\177]", |
f0cbd3ec FB |
674 | &n1, &n2, &n3, &n4, &n5, &n6, buff); |
675 | if (x < 6) | |
676 | return 1; | |
3b46e624 | 677 | |
f0cbd3ec FB |
678 | laddr = htonl((n1 << 24) | (n2 << 16) | (n3 << 8) | (n4)); |
679 | lport = htons((n5 << 8) | (n6)); | |
3b46e624 | 680 | |
460fec67 JK |
681 | if ((so = tcp_listen(slirp, INADDR_ANY, 0, laddr, |
682 | lport, SS_FACCEPTONCE)) == NULL) { | |
f0cbd3ec | 683 | return 1; |
460fec67 | 684 | } |
f0cbd3ec | 685 | n6 = ntohs(so->so_fport); |
3b46e624 | 686 | |
f0cbd3ec FB |
687 | n5 = (n6 >> 8) & 0xff; |
688 | n6 &= 0xff; | |
3b46e624 | 689 | |
f0cbd3ec | 690 | laddr = ntohl(so->so_faddr.s_addr); |
3b46e624 | 691 | |
f0cbd3ec FB |
692 | n1 = ((laddr >> 24) & 0xff); |
693 | n2 = ((laddr >> 16) & 0xff); | |
694 | n3 = ((laddr >> 8) & 0xff); | |
695 | n4 = (laddr & 0xff); | |
3b46e624 | 696 | |
f0cbd3ec | 697 | m->m_len = bptr - m->m_data; /* Adjust length */ |
0e44486c | 698 | m->m_len += snprintf(bptr, m->m_size - m->m_len, |
363a37d5 BS |
699 | "27 Entering Passive Mode (%d,%d,%d,%d,%d,%d)\r\n%s", |
700 | n1, n2, n3, n4, n5, n6, x==7?buff:""); | |
3b46e624 | 701 | |
f0cbd3ec FB |
702 | return 1; |
703 | } | |
3b46e624 | 704 | |
f0cbd3ec | 705 | return 1; |
3b46e624 | 706 | |
f0cbd3ec FB |
707 | case EMU_KSH: |
708 | /* | |
709 | * The kshell (Kerberos rsh) and shell services both pass | |
710 | * a local port port number to carry signals to the server | |
711 | * and stderr to the client. It is passed at the beginning | |
712 | * of the connection as a NUL-terminated decimal ASCII string. | |
713 | */ | |
714 | so->so_emu = 0; | |
715 | for (lport = 0, i = 0; i < m->m_len-1; ++i) { | |
716 | if (m->m_data[i] < '0' || m->m_data[i] > '9') | |
717 | return 1; /* invalid number */ | |
718 | lport *= 10; | |
719 | lport += m->m_data[i] - '0'; | |
720 | } | |
721 | if (m->m_data[m->m_len-1] == '\0' && lport != 0 && | |
460fec67 JK |
722 | (so = tcp_listen(slirp, INADDR_ANY, 0, so->so_laddr.s_addr, |
723 | htons(lport), SS_FACCEPTONCE)) != NULL) | |
0e44486c | 724 | m->m_len = snprintf(m->m_data, m->m_size, "%d", |
363a37d5 | 725 | ntohs(so->so_fport)) + 1; |
f0cbd3ec | 726 | return 1; |
3b46e624 | 727 | |
f0cbd3ec FB |
728 | case EMU_IRC: |
729 | /* | |
730 | * Need to emulate DCC CHAT, DCC SEND and DCC MOVE | |
731 | */ | |
732 | *(m->m_data+m->m_len) = 0; /* NULL terminate the string for strstr */ | |
733 | if ((bptr = (char *)strstr(m->m_data, "DCC")) == NULL) | |
734 | return 1; | |
3b46e624 | 735 | |
f0cbd3ec FB |
736 | /* The %256s is for the broken mIRC */ |
737 | if (sscanf(bptr, "DCC CHAT %256s %u %u", buff, &laddr, &lport) == 3) { | |
460fec67 JK |
738 | if ((so = tcp_listen(slirp, INADDR_ANY, 0, |
739 | htonl(laddr), htons(lport), | |
740 | SS_FACCEPTONCE)) == NULL) { | |
f0cbd3ec | 741 | return 1; |
460fec67 | 742 | } |
f0cbd3ec | 743 | m->m_len = bptr - m->m_data; /* Adjust length */ |
0e44486c | 744 | m->m_len += snprintf(bptr, m->m_size, |
363a37d5 BS |
745 | "DCC CHAT chat %lu %u%c\n", |
746 | (unsigned long)ntohl(so->so_faddr.s_addr), | |
747 | ntohs(so->so_fport), 1); | |
f0cbd3ec | 748 | } else if (sscanf(bptr, "DCC SEND %256s %u %u %u", buff, &laddr, &lport, &n1) == 4) { |
460fec67 JK |
749 | if ((so = tcp_listen(slirp, INADDR_ANY, 0, |
750 | htonl(laddr), htons(lport), | |
751 | SS_FACCEPTONCE)) == NULL) { | |
f0cbd3ec | 752 | return 1; |
460fec67 | 753 | } |
f0cbd3ec | 754 | m->m_len = bptr - m->m_data; /* Adjust length */ |
0e44486c | 755 | m->m_len += snprintf(bptr, m->m_size, |
363a37d5 BS |
756 | "DCC SEND %s %lu %u %u%c\n", buff, |
757 | (unsigned long)ntohl(so->so_faddr.s_addr), | |
758 | ntohs(so->so_fport), n1, 1); | |
f0cbd3ec | 759 | } else if (sscanf(bptr, "DCC MOVE %256s %u %u %u", buff, &laddr, &lport, &n1) == 4) { |
460fec67 JK |
760 | if ((so = tcp_listen(slirp, INADDR_ANY, 0, |
761 | htonl(laddr), htons(lport), | |
762 | SS_FACCEPTONCE)) == NULL) { | |
f0cbd3ec | 763 | return 1; |
460fec67 | 764 | } |
f0cbd3ec | 765 | m->m_len = bptr - m->m_data; /* Adjust length */ |
0e44486c | 766 | m->m_len += snprintf(bptr, m->m_size, |
363a37d5 BS |
767 | "DCC MOVE %s %lu %u %u%c\n", buff, |
768 | (unsigned long)ntohl(so->so_faddr.s_addr), | |
769 | ntohs(so->so_fport), n1, 1); | |
f0cbd3ec FB |
770 | } |
771 | return 1; | |
772 | ||
773 | case EMU_REALAUDIO: | |
5fafdf24 | 774 | /* |
f0cbd3ec FB |
775 | * RealAudio emulation - JP. We must try to parse the incoming |
776 | * data and try to find the two characters that contain the | |
777 | * port number. Then we redirect an udp port and replace the | |
778 | * number with the real port we got. | |
779 | * | |
780 | * The 1.0 beta versions of the player are not supported | |
781 | * any more. | |
5fafdf24 | 782 | * |
f0cbd3ec | 783 | * A typical packet for player version 1.0 (release version): |
3b46e624 | 784 | * |
5fafdf24 | 785 | * 0000:50 4E 41 00 05 |
0d62c4cf | 786 | * 0000:00 01 00 02 1B D7 00 00 67 E6 6C DC 63 00 12 50 ........g.l.c..P |
f0cbd3ec FB |
787 | * 0010:4E 43 4C 49 45 4E 54 20 31 30 31 20 41 4C 50 48 NCLIENT 101 ALPH |
788 | * 0020:41 6C 00 00 52 00 17 72 61 66 69 6C 65 73 2F 76 Al..R..rafiles/v | |
789 | * 0030:6F 61 2F 65 6E 67 6C 69 73 68 5F 2E 72 61 79 42 oa/english_.rayB | |
3b46e624 | 790 | * |
f0cbd3ec FB |
791 | * Now the port number 0x1BD7 is found at offset 0x04 of the |
792 | * Now the port number 0x1BD7 is found at offset 0x04 of the | |
793 | * second packet. This time we received five bytes first and | |
794 | * then the rest. You never know how many bytes you get. | |
795 | * | |
796 | * A typical packet for player version 2.0 (beta): | |
3b46e624 | 797 | * |
0d62c4cf JK |
798 | * 0000:50 4E 41 00 06 00 02 00 00 00 01 00 02 1B C1 00 PNA............. |
799 | * 0010:00 67 75 78 F5 63 00 0A 57 69 6E 32 2E 30 2E 30 .gux.c..Win2.0.0 | |
f0cbd3ec FB |
800 | * 0020:2E 35 6C 00 00 52 00 1C 72 61 66 69 6C 65 73 2F .5l..R..rafiles/ |
801 | * 0030:77 65 62 73 69 74 65 2F 32 30 72 65 6C 65 61 73 website/20releas | |
802 | * 0040:65 2E 72 61 79 53 00 00 06 36 42 e.rayS...6B | |
3b46e624 | 803 | * |
f0cbd3ec | 804 | * Port number 0x1BC1 is found at offset 0x0d. |
3b46e624 | 805 | * |
f0cbd3ec FB |
806 | * This is just a horrible switch statement. Variable ra tells |
807 | * us where we're going. | |
808 | */ | |
3b46e624 | 809 | |
f0cbd3ec FB |
810 | bptr = m->m_data; |
811 | while (bptr < m->m_data + m->m_len) { | |
812 | u_short p; | |
813 | static int ra = 0; | |
5fafdf24 | 814 | char ra_tbl[4]; |
3b46e624 | 815 | |
f0cbd3ec FB |
816 | ra_tbl[0] = 0x50; |
817 | ra_tbl[1] = 0x4e; | |
818 | ra_tbl[2] = 0x41; | |
819 | ra_tbl[3] = 0; | |
3b46e624 | 820 | |
f0cbd3ec FB |
821 | switch (ra) { |
822 | case 0: | |
823 | case 2: | |
824 | case 3: | |
825 | if (*bptr++ != ra_tbl[ra]) { | |
826 | ra = 0; | |
827 | continue; | |
828 | } | |
829 | break; | |
3b46e624 | 830 | |
f0cbd3ec FB |
831 | case 1: |
832 | /* | |
833 | * We may get 0x50 several times, ignore them | |
834 | */ | |
835 | if (*bptr == 0x50) { | |
836 | ra = 1; | |
837 | bptr++; | |
838 | continue; | |
839 | } else if (*bptr++ != ra_tbl[ra]) { | |
840 | ra = 0; | |
841 | continue; | |
842 | } | |
843 | break; | |
3b46e624 | 844 | |
5fafdf24 TS |
845 | case 4: |
846 | /* | |
f0cbd3ec FB |
847 | * skip version number |
848 | */ | |
849 | bptr++; | |
850 | break; | |
3b46e624 | 851 | |
5fafdf24 | 852 | case 5: |
f0cbd3ec FB |
853 | /* |
854 | * The difference between versions 1.0 and | |
855 | * 2.0 is here. For future versions of | |
856 | * the player this may need to be modified. | |
857 | */ | |
858 | if (*(bptr + 1) == 0x02) | |
859 | bptr += 8; | |
860 | else | |
861 | bptr += 4; | |
3b46e624 TS |
862 | break; |
863 | ||
f0cbd3ec FB |
864 | case 6: |
865 | /* This is the field containing the port | |
866 | * number that RA-player is listening to. | |
867 | */ | |
5fafdf24 | 868 | lport = (((u_char*)bptr)[0] << 8) |
f0cbd3ec | 869 | + ((u_char *)bptr)[1]; |
3b46e624 | 870 | if (lport < 6970) |
f0cbd3ec FB |
871 | lport += 256; /* don't know why */ |
872 | if (lport < 6970 || lport > 7170) | |
873 | return 1; /* failed */ | |
3b46e624 | 874 | |
f0cbd3ec FB |
875 | /* try to get udp port between 6970 - 7170 */ |
876 | for (p = 6970; p < 7071; p++) { | |
460fec67 | 877 | if (udp_listen(slirp, INADDR_ANY, |
3c6a0580 | 878 | htons(p), |
f0cbd3ec FB |
879 | so->so_laddr.s_addr, |
880 | htons(lport), | |
881 | SS_FACCEPTONCE)) { | |
882 | break; | |
883 | } | |
884 | } | |
885 | if (p == 7071) | |
886 | p = 0; | |
887 | *(u_char *)bptr++ = (p >> 8) & 0xff; | |
369c86e7 | 888 | *(u_char *)bptr = p & 0xff; |
5fafdf24 | 889 | ra = 0; |
f0cbd3ec | 890 | return 1; /* port redirected, we're done */ |
3b46e624 TS |
891 | break; |
892 | ||
f0cbd3ec | 893 | default: |
3b46e624 | 894 | ra = 0; |
f0cbd3ec FB |
895 | } |
896 | ra++; | |
897 | } | |
3b46e624 TS |
898 | return 1; |
899 | ||
f0cbd3ec FB |
900 | default: |
901 | /* Ooops, not emulated, won't call tcp_emu again */ | |
902 | so->so_emu = 0; | |
903 | return 1; | |
904 | } | |
905 | } | |
906 | ||
907 | /* | |
908 | * Do misc. config of SLiRP while its running. | |
909 | * Return 0 if this connections is to be closed, 1 otherwise, | |
910 | * return 2 if this is a command-line connection | |
911 | */ | |
b35725c5 | 912 | int tcp_ctl(struct socket *so) |
f0cbd3ec | 913 | { |
460fec67 | 914 | Slirp *slirp = so->slirp; |
b35725c5 JK |
915 | struct sbuf *sb = &so->so_snd; |
916 | struct ex_list *ex_ptr; | |
917 | int do_pty; | |
918 | ||
919 | DEBUG_CALL("tcp_ctl"); | |
ecc804ca | 920 | DEBUG_ARG("so = %p", so); |
b35725c5 | 921 | |
460fec67 | 922 | if (so->so_faddr.s_addr != slirp->vhost_addr.s_addr) { |
b35725c5 | 923 | /* Check if it's pty_exec */ |
460fec67 | 924 | for (ex_ptr = slirp->exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next) { |
b35725c5 | 925 | if (ex_ptr->ex_fport == so->so_fport && |
a13a4126 | 926 | so->so_faddr.s_addr == ex_ptr->ex_addr.s_addr) { |
b35725c5 JK |
927 | if (ex_ptr->ex_pty == 3) { |
928 | so->s = -1; | |
929 | so->extra = (void *)ex_ptr->ex_exec; | |
930 | return 1; | |
931 | } | |
932 | do_pty = ex_ptr->ex_pty; | |
b2bedb21 | 933 | DEBUG_MISC((dfd, " executing %s\n", ex_ptr->ex_exec)); |
b35725c5 JK |
934 | return fork_exec(so, ex_ptr->ex_exec, do_pty); |
935 | } | |
936 | } | |
937 | } | |
938 | sb->sb_cc = | |
939 | snprintf(sb->sb_wptr, sb->sb_datalen - (sb->sb_wptr - sb->sb_data), | |
940 | "Error: No application configured.\r\n"); | |
941 | sb->sb_wptr += sb->sb_cc; | |
942 | return 0; | |
f0cbd3ec | 943 | } |