eaf1e20a |
1 | /* |
2 | * SSH port forwarding. |
3 | */ |
4 | |
f26d5c33 |
5 | #include <stdio.h> |
6 | #include <stdlib.h> |
7 | |
8 | #include "putty.h" |
9 | #include "ssh.h" |
10 | |
11 | #ifndef FALSE |
12 | #define FALSE 0 |
13 | #endif |
14 | #ifndef TRUE |
15 | #define TRUE 1 |
16 | #endif |
17 | |
f26d5c33 |
18 | struct PFwdPrivate { |
c85623f9 |
19 | const struct plug_function_table *fn; |
f26d5c33 |
20 | /* the above variable absolutely *must* be the first in this structure */ |
21 | void *c; /* (channel) data used by ssh.c */ |
6b78788a |
22 | void *backhandle; /* instance of SSH backend itself */ |
23 | /* Note that backhandle need not be filled in if c is non-NULL */ |
f26d5c33 |
24 | Socket s; |
5471d09a |
25 | int throttled, throttle_override; |
f26d5c33 |
26 | int ready; |
820ebe3b |
27 | /* |
28 | * `dynamic' does double duty. It's set to 0 for an ordinary |
29 | * forwarded port, and nonzero for SOCKS-style dynamic port |
30 | * forwarding; but it also represents the state of the SOCKS |
31 | * exchange. |
32 | */ |
33 | int dynamic; |
34 | /* |
35 | * `hostname' and `port' are the real hostname and port, once |
4fba1c1f |
36 | * we know what we're connecting to. |
820ebe3b |
37 | */ |
4fba1c1f |
38 | char *hostname; |
820ebe3b |
39 | int port; |
40 | /* |
4fba1c1f |
41 | * `socksbuf' is the buffer we use to accumulate a SOCKS request. |
42 | */ |
43 | char *socksbuf; |
44 | int sockslen, sockssize; |
45 | /* |
820ebe3b |
46 | * When doing dynamic port forwarding, we can receive |
47 | * connection data before we are actually able to send it; so |
48 | * we may have to temporarily hold some in a dynamically |
49 | * allocated buffer here. |
50 | */ |
51 | void *buffer; |
52 | int buflen; |
f26d5c33 |
53 | }; |
54 | |
4fba1c1f |
55 | static struct PFwdPrivate *new_portfwd_private(void) |
56 | { |
57 | struct PFwdPrivate *pr = snew(struct PFwdPrivate); |
58 | pr->hostname = NULL; |
59 | pr->socksbuf = NULL; |
60 | pr->sockslen = pr->sockssize = 0; |
61 | pr->buffer = NULL; |
62 | return pr; |
63 | } |
64 | |
65 | static void free_portfwd_private(struct PFwdPrivate *pr) |
66 | { |
67 | if (!pr) |
68 | return; |
69 | sfree(pr->hostname); |
70 | sfree(pr->socksbuf); |
71 | sfree(pr->buffer); |
72 | sfree(pr); |
73 | } |
74 | |
7555d6a5 |
75 | static void pfd_log(Plug plug, int type, SockAddr addr, int port, |
76 | const char *error_msg, int error_code) |
77 | { |
78 | /* we have to dump these since we have no interface to logging.c */ |
79 | } |
80 | |
cbe2d68f |
81 | static int pfd_closing(Plug plug, const char *error_msg, int error_code, |
f26d5c33 |
82 | int calling_back) |
83 | { |
84 | struct PFwdPrivate *pr = (struct PFwdPrivate *) plug; |
85 | |
c6b41791 |
86 | if (error_msg) { |
87 | /* |
88 | * Socket error. Slam the connection instantly shut. |
89 | */ |
90 | sshfwd_unclean_close(pr->c); |
91 | } else { |
92 | /* |
93 | * Ordinary EOF received on socket. Send an EOF on the SSH |
94 | * channel. |
95 | */ |
96 | if (pr->c) |
97 | sshfwd_write_eof(pr->c); |
98 | } |
bc06669b |
99 | |
f26d5c33 |
100 | return 1; |
101 | } |
102 | |
103 | static int pfd_receive(Plug plug, int urgent, char *data, int len) |
104 | { |
105 | struct PFwdPrivate *pr = (struct PFwdPrivate *) plug; |
820ebe3b |
106 | if (pr->dynamic) { |
107 | while (len--) { |
4fba1c1f |
108 | if (pr->sockslen >= pr->sockssize) { |
109 | pr->sockssize = pr->sockslen * 5 / 4 + 256; |
110 | pr->socksbuf = sresize(pr->socksbuf, pr->sockssize, char); |
820ebe3b |
111 | } |
4fba1c1f |
112 | pr->socksbuf[pr->sockslen++] = *data++; |
820ebe3b |
113 | |
114 | /* |
115 | * Now check what's in the buffer to see if it's a |
116 | * valid and complete message in the SOCKS exchange. |
117 | */ |
118 | if ((pr->dynamic == 1 || (pr->dynamic >> 12) == 4) && |
4fba1c1f |
119 | pr->socksbuf[0] == 4) { |
820ebe3b |
120 | /* |
121 | * SOCKS 4. |
122 | */ |
123 | if (pr->dynamic == 1) |
124 | pr->dynamic = 0x4000; |
4fba1c1f |
125 | if (pr->sockslen < 2) |
126 | continue; /* don't have command code yet */ |
127 | if (pr->socksbuf[1] != 1) { |
b8a98e25 |
128 | /* Not CONNECT. */ |
820ebe3b |
129 | /* Send back a SOCKS 4 error before closing. */ |
130 | char data[8]; |
131 | memset(data, 0, sizeof(data)); |
132 | data[1] = 91; /* generic `request rejected' */ |
133 | sk_write(pr->s, data, 8); |
134 | pfd_close(pr->s); |
135 | return 1; |
136 | } |
4fba1c1f |
137 | if (pr->sockslen <= 8) |
138 | continue; /* haven't started user/hostname */ |
139 | if (pr->socksbuf[pr->sockslen-1] != 0) |
b8a98e25 |
140 | continue; /* haven't _finished_ user/hostname */ |
820ebe3b |
141 | /* |
142 | * Now we have a full SOCKS 4 request. Check it to |
143 | * see if it's a SOCKS 4A request. |
144 | */ |
4fba1c1f |
145 | if (pr->socksbuf[4] == 0 && pr->socksbuf[5] == 0 && |
146 | pr->socksbuf[6] == 0 && pr->socksbuf[7] != 0) { |
820ebe3b |
147 | /* |
148 | * It's SOCKS 4A. So if we haven't yet |
149 | * collected the host name, we should continue |
150 | * waiting for data in order to do so; if we |
151 | * have, we can go ahead. |
152 | */ |
153 | int len; |
154 | if (pr->dynamic == 0x4000) { |
155 | pr->dynamic = 0x4001; |
4fba1c1f |
156 | pr->sockslen = 8; /* reset buffer to overwrite name */ |
820ebe3b |
157 | continue; |
158 | } |
4fba1c1f |
159 | pr->socksbuf[0] = 0; /* reply version code */ |
160 | pr->socksbuf[1] = 90; /* request granted */ |
161 | sk_write(pr->s, pr->socksbuf, 8); |
162 | len = pr->sockslen - 8; |
163 | pr->port = GET_16BIT_MSB_FIRST(pr->socksbuf+2); |
164 | pr->hostname = snewn(len+1, char); |
165 | pr->hostname[len] = '\0'; |
166 | memcpy(pr->hostname, pr->socksbuf + 8, len); |
820ebe3b |
167 | goto connect; |
168 | } else { |
169 | /* |
170 | * It's SOCKS 4, which means we should format |
171 | * the IP address into the hostname string and |
172 | * then just go. |
173 | */ |
4fba1c1f |
174 | pr->socksbuf[0] = 0; /* reply version code */ |
175 | pr->socksbuf[1] = 90; /* request granted */ |
176 | sk_write(pr->s, pr->socksbuf, 8); |
177 | pr->port = GET_16BIT_MSB_FIRST(pr->socksbuf+2); |
178 | pr->hostname = dupprintf("%d.%d.%d.%d", |
179 | (unsigned char)pr->socksbuf[4], |
180 | (unsigned char)pr->socksbuf[5], |
181 | (unsigned char)pr->socksbuf[6], |
182 | (unsigned char)pr->socksbuf[7]); |
820ebe3b |
183 | goto connect; |
184 | } |
185 | } |
186 | |
187 | if ((pr->dynamic == 1 || (pr->dynamic >> 12) == 5) && |
4fba1c1f |
188 | pr->socksbuf[0] == 5) { |
820ebe3b |
189 | /* |
190 | * SOCKS 5. |
191 | */ |
192 | if (pr->dynamic == 1) |
193 | pr->dynamic = 0x5000; |
194 | |
195 | if (pr->dynamic == 0x5000) { |
196 | int i, method; |
197 | char data[2]; |
198 | /* |
199 | * We're receiving a set of method identifiers. |
200 | */ |
4fba1c1f |
201 | if (pr->sockslen < 2) |
202 | continue; /* no method count yet */ |
203 | if (pr->sockslen < 2 + (unsigned char)pr->socksbuf[1]) |
820ebe3b |
204 | continue; /* no methods yet */ |
205 | method = 0xFF; /* invalid */ |
4fba1c1f |
206 | for (i = 0; i < (unsigned char)pr->socksbuf[1]; i++) |
207 | if (pr->socksbuf[2+i] == 0) { |
820ebe3b |
208 | method = 0;/* no auth */ |
209 | break; |
210 | } |
211 | data[0] = 5; |
212 | data[1] = method; |
213 | sk_write(pr->s, data, 2); |
214 | pr->dynamic = 0x5001; |
4fba1c1f |
215 | pr->sockslen = 0; /* re-empty the buffer */ |
820ebe3b |
216 | continue; |
217 | } |
218 | |
219 | if (pr->dynamic == 0x5001) { |
04df1251 |
220 | /* |
221 | * We're receiving a SOCKS request. |
222 | */ |
223 | unsigned char reply[10]; /* SOCKS5 atyp=1 reply */ |
4797387c |
224 | int atype, alen = 0; |
04df1251 |
225 | |
226 | /* |
227 | * Pre-fill reply packet. |
228 | * In all cases, we set BND.{HOST,ADDR} to 0.0.0.0:0 |
229 | * (atyp=1) in the reply; if we succeed, we don't know |
230 | * the right answers, and if we fail, they should be |
231 | * ignored. |
232 | */ |
233 | memset(reply, 0, lenof(reply)); |
234 | reply[0] = 5; /* VER */ |
235 | reply[3] = 1; /* ATYP = 1 (IPv4, 0.0.0.0:0) */ |
236 | |
4fba1c1f |
237 | if (pr->sockslen < 6) continue; |
238 | atype = (unsigned char)pr->socksbuf[3]; |
820ebe3b |
239 | if (atype == 1) /* IPv4 address */ |
240 | alen = 4; |
241 | if (atype == 4) /* IPv6 address */ |
242 | alen = 16; |
243 | if (atype == 3) /* domain name has leading length */ |
4fba1c1f |
244 | alen = 1 + (unsigned char)pr->socksbuf[4]; |
245 | if (pr->sockslen < 6 + alen) continue; |
246 | if (pr->socksbuf[1] != 1 || pr->socksbuf[2] != 0) { |
04df1251 |
247 | /* Not CONNECT or reserved field nonzero - error */ |
248 | reply[1] = 1; /* generic failure */ |
776792d7 |
249 | sk_write(pr->s, (char *) reply, lenof(reply)); |
820ebe3b |
250 | pfd_close(pr->s); |
251 | return 1; |
252 | } |
253 | /* |
254 | * Now we have a viable connect request. Switch |
255 | * on atype. |
256 | */ |
4fba1c1f |
257 | pr->port = GET_16BIT_MSB_FIRST(pr->socksbuf+4+alen); |
820ebe3b |
258 | if (atype == 1) { |
04df1251 |
259 | /* REP=0 (success) already */ |
776792d7 |
260 | sk_write(pr->s, (char *) reply, lenof(reply)); |
4fba1c1f |
261 | pr->hostname = dupprintf("%d.%d.%d.%d", |
262 | (unsigned char)pr->socksbuf[4], |
263 | (unsigned char)pr->socksbuf[5], |
264 | (unsigned char)pr->socksbuf[6], |
265 | (unsigned char)pr->socksbuf[7]); |
820ebe3b |
266 | goto connect; |
267 | } else if (atype == 3) { |
04df1251 |
268 | /* REP=0 (success) already */ |
776792d7 |
269 | sk_write(pr->s, (char *) reply, lenof(reply)); |
4fba1c1f |
270 | pr->hostname = snewn(alen, char); |
820ebe3b |
271 | pr->hostname[alen-1] = '\0'; |
4fba1c1f |
272 | memcpy(pr->hostname, pr->socksbuf + 5, alen-1); |
820ebe3b |
273 | goto connect; |
274 | } else { |
275 | /* |
276 | * Unknown address type. (FIXME: support IPv6!) |
277 | */ |
04df1251 |
278 | reply[1] = 8; /* atype not supported */ |
776792d7 |
279 | sk_write(pr->s, (char *) reply, lenof(reply)); |
820ebe3b |
280 | pfd_close(pr->s); |
776792d7 |
281 | return 1; |
820ebe3b |
282 | } |
283 | } |
284 | } |
776792d7 |
285 | |
820ebe3b |
286 | /* |
287 | * If we get here without either having done `continue' |
288 | * or `goto connect', it must be because there is no |
289 | * sensible interpretation of what's in our buffer. So |
290 | * close the connection rudely. |
291 | */ |
292 | pfd_close(pr->s); |
293 | return 1; |
294 | } |
295 | return 1; |
296 | |
297 | /* |
298 | * We come here when we're ready to make an actual |
299 | * connection. |
300 | */ |
301 | connect: |
4fba1c1f |
302 | sfree(pr->socksbuf); |
303 | pr->socksbuf = NULL; |
820ebe3b |
304 | |
09d133f3 |
305 | /* |
306 | * Freeze the socket until the SSH server confirms the |
307 | * connection. |
308 | */ |
309 | sk_set_frozen(pr->s, 1); |
310 | |
820ebe3b |
311 | pr->c = new_sock_channel(pr->backhandle, pr->s); |
312 | if (pr->c == NULL) { |
313 | pfd_close(pr->s); |
314 | return 1; |
315 | } else { |
316 | /* asks to forward to the specified host/port for this */ |
317 | ssh_send_port_open(pr->c, pr->hostname, pr->port, "forwarding"); |
318 | } |
319 | pr->dynamic = 0; |
320 | |
321 | /* |
820ebe3b |
322 | * If there's any data remaining in our current buffer, |
323 | * save it to be sent on pfd_confirm(). |
324 | */ |
325 | if (len > 0) { |
326 | pr->buffer = snewn(len, char); |
327 | memcpy(pr->buffer, data, len); |
328 | pr->buflen = len; |
329 | } |
330 | } |
5471d09a |
331 | if (pr->ready) { |
332 | if (sshfwd_write(pr->c, data, len) > 0) { |
333 | pr->throttled = 1; |
334 | sk_set_frozen(pr->s, 1); |
335 | } |
336 | } |
f26d5c33 |
337 | return 1; |
338 | } |
339 | |
5471d09a |
340 | static void pfd_sent(Plug plug, int bufsize) |
341 | { |
342 | struct PFwdPrivate *pr = (struct PFwdPrivate *) plug; |
343 | |
820ebe3b |
344 | if (pr->c) |
345 | sshfwd_unthrottle(pr->c, bufsize); |
5471d09a |
346 | } |
347 | |
f26d5c33 |
348 | /* |
349 | * Called when receiving a PORT OPEN from the server |
350 | */ |
cbe2d68f |
351 | const char *pfd_newconnect(Socket *s, char *hostname, int port, |
4a693cfc |
352 | void *c, Conf *conf, int addressfamily) |
f26d5c33 |
353 | { |
c85623f9 |
354 | static const struct plug_function_table fn_table = { |
7555d6a5 |
355 | pfd_log, |
f26d5c33 |
356 | pfd_closing, |
357 | pfd_receive, |
5471d09a |
358 | pfd_sent, |
f26d5c33 |
359 | NULL |
360 | }; |
361 | |
362 | SockAddr addr; |
cbe2d68f |
363 | const char *err; |
364 | char *dummy_realhost; |
f26d5c33 |
365 | struct PFwdPrivate *pr; |
366 | |
367 | /* |
368 | * Try to find host. |
369 | */ |
4a693cfc |
370 | addr = name_lookup(hostname, port, &dummy_realhost, conf, addressfamily); |
f85e6f6e |
371 | if ((err = sk_addr_error(addr)) != NULL) { |
372 | sk_addr_free(addr); |
f26d5c33 |
373 | return err; |
f85e6f6e |
374 | } |
f26d5c33 |
375 | |
376 | /* |
377 | * Open socket. |
378 | */ |
4fba1c1f |
379 | pr = new_portfwd_private(); |
f26d5c33 |
380 | pr->fn = &fn_table; |
5471d09a |
381 | pr->throttled = pr->throttle_override = 0; |
f26d5c33 |
382 | pr->ready = 1; |
383 | pr->c = c; |
6b78788a |
384 | pr->backhandle = NULL; /* we shouldn't need this */ |
4b42e4f6 |
385 | pr->dynamic = 0; |
f26d5c33 |
386 | |
e8fa8f62 |
387 | pr->s = *s = new_connection(addr, dummy_realhost, port, |
4a693cfc |
388 | 0, 1, 0, 0, (Plug) pr, conf); |
038ec85e |
389 | sfree(dummy_realhost); |
808c3834 |
390 | if ((err = sk_socket_error(*s)) != NULL) { |
4fba1c1f |
391 | free_portfwd_private(pr); |
f26d5c33 |
392 | return err; |
393 | } |
394 | |
395 | sk_set_private_ptr(*s, pr); |
f26d5c33 |
396 | return NULL; |
397 | } |
398 | |
399 | /* |
400 | called when someone connects to the local port |
401 | */ |
402 | |
f7f9fb5c |
403 | static int pfd_accepting(Plug p, OSSocket sock) |
f26d5c33 |
404 | { |
c85623f9 |
405 | static const struct plug_function_table fn_table = { |
7555d6a5 |
406 | pfd_log, |
f26d5c33 |
407 | pfd_closing, |
408 | pfd_receive, |
5471d09a |
409 | pfd_sent, |
f26d5c33 |
410 | NULL |
411 | }; |
412 | struct PFwdPrivate *pr, *org; |
f26d5c33 |
413 | Socket s; |
cbe2d68f |
414 | const char *err; |
f26d5c33 |
415 | |
f26d5c33 |
416 | org = (struct PFwdPrivate *)p; |
4fba1c1f |
417 | pr = new_portfwd_private(); |
f26d5c33 |
418 | pr->fn = &fn_table; |
419 | |
420 | pr->c = NULL; |
6b78788a |
421 | pr->backhandle = org->backhandle; |
f26d5c33 |
422 | |
423 | pr->s = s = sk_register(sock, (Plug) pr); |
808c3834 |
424 | if ((err = sk_socket_error(s)) != NULL) { |
4fba1c1f |
425 | free_portfwd_private(pr); |
f26d5c33 |
426 | return err != NULL; |
427 | } |
428 | |
820ebe3b |
429 | sk_set_private_ptr(s, pr); |
f26d5c33 |
430 | |
5471d09a |
431 | pr->throttled = pr->throttle_override = 0; |
f26d5c33 |
432 | pr->ready = 0; |
f26d5c33 |
433 | |
820ebe3b |
434 | if (org->dynamic) { |
435 | pr->dynamic = 1; |
b8a98e25 |
436 | pr->port = 0; /* "hostname" buffer is so far empty */ |
820ebe3b |
437 | sk_set_frozen(s, 0); /* we want to receive SOCKS _now_! */ |
f26d5c33 |
438 | } else { |
4b42e4f6 |
439 | pr->dynamic = 0; |
4fba1c1f |
440 | pr->hostname = dupstr(org->hostname); |
820ebe3b |
441 | pr->port = org->port; |
442 | pr->c = new_sock_channel(org->backhandle, s); |
443 | |
444 | if (pr->c == NULL) { |
4fba1c1f |
445 | free_portfwd_private(pr); |
820ebe3b |
446 | return 1; |
447 | } else { |
448 | /* asks to forward to the specified host/port for this */ |
449 | ssh_send_port_open(pr->c, pr->hostname, pr->port, "forwarding"); |
450 | } |
f26d5c33 |
451 | } |
452 | |
453 | return 0; |
454 | } |
455 | |
456 | |
457 | /* Add a new forwarding from port -> desthost:destport |
6ee9b735 |
458 | sets up a listener on the local machine on (srcaddr:)port |
f26d5c33 |
459 | */ |
cbe2d68f |
460 | const char *pfd_addforward(char *desthost, int destport, char *srcaddr, |
4a693cfc |
461 | int port, void *backhandle, Conf *conf, |
05581745 |
462 | void **sockdata, int address_family) |
f26d5c33 |
463 | { |
c85623f9 |
464 | static const struct plug_function_table fn_table = { |
7555d6a5 |
465 | pfd_log, |
f26d5c33 |
466 | pfd_closing, |
5471d09a |
467 | pfd_receive, /* should not happen... */ |
468 | pfd_sent, /* also should not happen */ |
f26d5c33 |
469 | pfd_accepting |
470 | }; |
471 | |
cbe2d68f |
472 | const char *err; |
f26d5c33 |
473 | struct PFwdPrivate *pr; |
474 | Socket s; |
475 | |
476 | /* |
477 | * Open socket. |
478 | */ |
4fba1c1f |
479 | pr = new_portfwd_private(); |
f26d5c33 |
480 | pr->fn = &fn_table; |
481 | pr->c = NULL; |
820ebe3b |
482 | if (desthost) { |
4fba1c1f |
483 | pr->hostname = dupstr(desthost); |
820ebe3b |
484 | pr->port = destport; |
485 | pr->dynamic = 0; |
486 | } else |
487 | pr->dynamic = 1; |
5471d09a |
488 | pr->throttled = pr->throttle_override = 0; |
f26d5c33 |
489 | pr->ready = 0; |
6b78788a |
490 | pr->backhandle = backhandle; |
f26d5c33 |
491 | |
e8fa8f62 |
492 | pr->s = s = new_listener(srcaddr, port, (Plug) pr, |
4a693cfc |
493 | !conf_get_int(conf, CONF_lport_acceptall), |
494 | conf, address_family); |
808c3834 |
495 | if ((err = sk_socket_error(s)) != NULL) { |
4fba1c1f |
496 | free_portfwd_private(pr); |
f26d5c33 |
497 | return err; |
498 | } |
499 | |
500 | sk_set_private_ptr(s, pr); |
501 | |
fda2feb1 |
502 | *sockdata = (void *)s; |
503 | |
f26d5c33 |
504 | return NULL; |
505 | } |
506 | |
507 | void pfd_close(Socket s) |
508 | { |
509 | struct PFwdPrivate *pr; |
510 | |
511 | if (!s) |
512 | return; |
513 | |
514 | pr = (struct PFwdPrivate *) sk_get_private_ptr(s); |
515 | |
4fba1c1f |
516 | free_portfwd_private(pr); |
f26d5c33 |
517 | |
518 | sk_close(s); |
519 | } |
520 | |
fda2feb1 |
521 | /* |
522 | * Terminate a listener. |
523 | */ |
524 | void pfd_terminate(void *sv) |
525 | { |
526 | pfd_close((Socket)sv); |
527 | } |
528 | |
5471d09a |
529 | void pfd_unthrottle(Socket s) |
530 | { |
531 | struct PFwdPrivate *pr; |
532 | if (!s) |
533 | return; |
534 | pr = (struct PFwdPrivate *) sk_get_private_ptr(s); |
535 | |
536 | pr->throttled = 0; |
537 | sk_set_frozen(s, pr->throttled || pr->throttle_override); |
538 | } |
539 | |
540 | void pfd_override_throttle(Socket s, int enable) |
541 | { |
542 | struct PFwdPrivate *pr; |
543 | if (!s) |
544 | return; |
545 | pr = (struct PFwdPrivate *) sk_get_private_ptr(s); |
546 | |
547 | pr->throttle_override = enable; |
548 | sk_set_frozen(s, pr->throttled || pr->throttle_override); |
549 | } |
550 | |
f26d5c33 |
551 | /* |
552 | * Called to send data down the raw connection. |
553 | */ |
5471d09a |
554 | int pfd_send(Socket s, char *data, int len) |
f26d5c33 |
555 | { |
f26d5c33 |
556 | if (s == NULL) |
5471d09a |
557 | return 0; |
558 | return sk_write(s, data, len); |
f26d5c33 |
559 | } |
560 | |
bc06669b |
561 | void pfd_send_eof(Socket s) |
562 | { |
563 | sk_write_eof(s); |
564 | } |
f26d5c33 |
565 | |
566 | void pfd_confirm(Socket s) |
567 | { |
5f2e19fc |
568 | struct PFwdPrivate *pr; |
f26d5c33 |
569 | |
570 | if (s == NULL) |
571 | return; |
572 | |
5f2e19fc |
573 | pr = (struct PFwdPrivate *) sk_get_private_ptr(s); |
f26d5c33 |
574 | pr->ready = 1; |
575 | sk_set_frozen(s, 0); |
576 | sk_write(s, NULL, 0); |
820ebe3b |
577 | if (pr->buffer) { |
578 | sshfwd_write(pr->c, pr->buffer, pr->buflen); |
579 | sfree(pr->buffer); |
580 | pr->buffer = NULL; |
581 | } |
f26d5c33 |
582 | } |