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 | */ |
133ff7fb |
90 | if (pr->c) { |
91 | sshfwd_unclean_close(pr->c); |
92 | } else { |
93 | /* |
94 | * We might not have an SSH channel, if a socket error |
95 | * occurred during SOCKS negotiation. If not, we must |
96 | * clean ourself up without sshfwd_unclean_close's call |
97 | * back to pfd_close. |
98 | */ |
99 | pfd_close(pr->s); |
100 | } |
c6b41791 |
101 | } else { |
102 | /* |
103 | * Ordinary EOF received on socket. Send an EOF on the SSH |
104 | * channel. |
105 | */ |
106 | if (pr->c) |
107 | sshfwd_write_eof(pr->c); |
108 | } |
bc06669b |
109 | |
f26d5c33 |
110 | return 1; |
111 | } |
112 | |
113 | static int pfd_receive(Plug plug, int urgent, char *data, int len) |
114 | { |
115 | struct PFwdPrivate *pr = (struct PFwdPrivate *) plug; |
820ebe3b |
116 | if (pr->dynamic) { |
117 | while (len--) { |
4fba1c1f |
118 | if (pr->sockslen >= pr->sockssize) { |
119 | pr->sockssize = pr->sockslen * 5 / 4 + 256; |
120 | pr->socksbuf = sresize(pr->socksbuf, pr->sockssize, char); |
820ebe3b |
121 | } |
4fba1c1f |
122 | pr->socksbuf[pr->sockslen++] = *data++; |
820ebe3b |
123 | |
124 | /* |
125 | * Now check what's in the buffer to see if it's a |
126 | * valid and complete message in the SOCKS exchange. |
127 | */ |
128 | if ((pr->dynamic == 1 || (pr->dynamic >> 12) == 4) && |
4fba1c1f |
129 | pr->socksbuf[0] == 4) { |
820ebe3b |
130 | /* |
131 | * SOCKS 4. |
132 | */ |
133 | if (pr->dynamic == 1) |
134 | pr->dynamic = 0x4000; |
4fba1c1f |
135 | if (pr->sockslen < 2) |
136 | continue; /* don't have command code yet */ |
137 | if (pr->socksbuf[1] != 1) { |
b8a98e25 |
138 | /* Not CONNECT. */ |
820ebe3b |
139 | /* Send back a SOCKS 4 error before closing. */ |
140 | char data[8]; |
141 | memset(data, 0, sizeof(data)); |
142 | data[1] = 91; /* generic `request rejected' */ |
143 | sk_write(pr->s, data, 8); |
144 | pfd_close(pr->s); |
145 | return 1; |
146 | } |
4fba1c1f |
147 | if (pr->sockslen <= 8) |
148 | continue; /* haven't started user/hostname */ |
149 | if (pr->socksbuf[pr->sockslen-1] != 0) |
b8a98e25 |
150 | continue; /* haven't _finished_ user/hostname */ |
820ebe3b |
151 | /* |
152 | * Now we have a full SOCKS 4 request. Check it to |
153 | * see if it's a SOCKS 4A request. |
154 | */ |
4fba1c1f |
155 | if (pr->socksbuf[4] == 0 && pr->socksbuf[5] == 0 && |
156 | pr->socksbuf[6] == 0 && pr->socksbuf[7] != 0) { |
820ebe3b |
157 | /* |
158 | * It's SOCKS 4A. So if we haven't yet |
159 | * collected the host name, we should continue |
160 | * waiting for data in order to do so; if we |
161 | * have, we can go ahead. |
162 | */ |
163 | int len; |
164 | if (pr->dynamic == 0x4000) { |
165 | pr->dynamic = 0x4001; |
4fba1c1f |
166 | pr->sockslen = 8; /* reset buffer to overwrite name */ |
820ebe3b |
167 | continue; |
168 | } |
4fba1c1f |
169 | pr->socksbuf[0] = 0; /* reply version code */ |
170 | pr->socksbuf[1] = 90; /* request granted */ |
171 | sk_write(pr->s, pr->socksbuf, 8); |
172 | len = pr->sockslen - 8; |
173 | pr->port = GET_16BIT_MSB_FIRST(pr->socksbuf+2); |
174 | pr->hostname = snewn(len+1, char); |
175 | pr->hostname[len] = '\0'; |
176 | memcpy(pr->hostname, pr->socksbuf + 8, len); |
820ebe3b |
177 | goto connect; |
178 | } else { |
179 | /* |
180 | * It's SOCKS 4, which means we should format |
181 | * the IP address into the hostname string and |
182 | * then just go. |
183 | */ |
4fba1c1f |
184 | pr->socksbuf[0] = 0; /* reply version code */ |
185 | pr->socksbuf[1] = 90; /* request granted */ |
186 | sk_write(pr->s, pr->socksbuf, 8); |
187 | pr->port = GET_16BIT_MSB_FIRST(pr->socksbuf+2); |
188 | pr->hostname = dupprintf("%d.%d.%d.%d", |
189 | (unsigned char)pr->socksbuf[4], |
190 | (unsigned char)pr->socksbuf[5], |
191 | (unsigned char)pr->socksbuf[6], |
192 | (unsigned char)pr->socksbuf[7]); |
820ebe3b |
193 | goto connect; |
194 | } |
195 | } |
196 | |
197 | if ((pr->dynamic == 1 || (pr->dynamic >> 12) == 5) && |
4fba1c1f |
198 | pr->socksbuf[0] == 5) { |
820ebe3b |
199 | /* |
200 | * SOCKS 5. |
201 | */ |
202 | if (pr->dynamic == 1) |
203 | pr->dynamic = 0x5000; |
204 | |
205 | if (pr->dynamic == 0x5000) { |
206 | int i, method; |
207 | char data[2]; |
208 | /* |
209 | * We're receiving a set of method identifiers. |
210 | */ |
4fba1c1f |
211 | if (pr->sockslen < 2) |
212 | continue; /* no method count yet */ |
213 | if (pr->sockslen < 2 + (unsigned char)pr->socksbuf[1]) |
820ebe3b |
214 | continue; /* no methods yet */ |
215 | method = 0xFF; /* invalid */ |
4fba1c1f |
216 | for (i = 0; i < (unsigned char)pr->socksbuf[1]; i++) |
217 | if (pr->socksbuf[2+i] == 0) { |
820ebe3b |
218 | method = 0;/* no auth */ |
219 | break; |
220 | } |
221 | data[0] = 5; |
222 | data[1] = method; |
223 | sk_write(pr->s, data, 2); |
224 | pr->dynamic = 0x5001; |
4fba1c1f |
225 | pr->sockslen = 0; /* re-empty the buffer */ |
820ebe3b |
226 | continue; |
227 | } |
228 | |
229 | if (pr->dynamic == 0x5001) { |
04df1251 |
230 | /* |
231 | * We're receiving a SOCKS request. |
232 | */ |
233 | unsigned char reply[10]; /* SOCKS5 atyp=1 reply */ |
4797387c |
234 | int atype, alen = 0; |
04df1251 |
235 | |
236 | /* |
237 | * Pre-fill reply packet. |
238 | * In all cases, we set BND.{HOST,ADDR} to 0.0.0.0:0 |
239 | * (atyp=1) in the reply; if we succeed, we don't know |
240 | * the right answers, and if we fail, they should be |
241 | * ignored. |
242 | */ |
243 | memset(reply, 0, lenof(reply)); |
244 | reply[0] = 5; /* VER */ |
245 | reply[3] = 1; /* ATYP = 1 (IPv4, 0.0.0.0:0) */ |
246 | |
4fba1c1f |
247 | if (pr->sockslen < 6) continue; |
248 | atype = (unsigned char)pr->socksbuf[3]; |
820ebe3b |
249 | if (atype == 1) /* IPv4 address */ |
250 | alen = 4; |
251 | if (atype == 4) /* IPv6 address */ |
252 | alen = 16; |
253 | if (atype == 3) /* domain name has leading length */ |
4fba1c1f |
254 | alen = 1 + (unsigned char)pr->socksbuf[4]; |
255 | if (pr->sockslen < 6 + alen) continue; |
256 | if (pr->socksbuf[1] != 1 || pr->socksbuf[2] != 0) { |
04df1251 |
257 | /* Not CONNECT or reserved field nonzero - error */ |
258 | reply[1] = 1; /* generic failure */ |
776792d7 |
259 | sk_write(pr->s, (char *) reply, lenof(reply)); |
820ebe3b |
260 | pfd_close(pr->s); |
261 | return 1; |
262 | } |
263 | /* |
264 | * Now we have a viable connect request. Switch |
265 | * on atype. |
266 | */ |
4fba1c1f |
267 | pr->port = GET_16BIT_MSB_FIRST(pr->socksbuf+4+alen); |
820ebe3b |
268 | if (atype == 1) { |
04df1251 |
269 | /* REP=0 (success) already */ |
776792d7 |
270 | sk_write(pr->s, (char *) reply, lenof(reply)); |
4fba1c1f |
271 | pr->hostname = dupprintf("%d.%d.%d.%d", |
272 | (unsigned char)pr->socksbuf[4], |
273 | (unsigned char)pr->socksbuf[5], |
274 | (unsigned char)pr->socksbuf[6], |
275 | (unsigned char)pr->socksbuf[7]); |
820ebe3b |
276 | goto connect; |
277 | } else if (atype == 3) { |
04df1251 |
278 | /* REP=0 (success) already */ |
776792d7 |
279 | sk_write(pr->s, (char *) reply, lenof(reply)); |
4fba1c1f |
280 | pr->hostname = snewn(alen, char); |
820ebe3b |
281 | pr->hostname[alen-1] = '\0'; |
4fba1c1f |
282 | memcpy(pr->hostname, pr->socksbuf + 5, alen-1); |
820ebe3b |
283 | goto connect; |
284 | } else { |
285 | /* |
286 | * Unknown address type. (FIXME: support IPv6!) |
287 | */ |
04df1251 |
288 | reply[1] = 8; /* atype not supported */ |
776792d7 |
289 | sk_write(pr->s, (char *) reply, lenof(reply)); |
820ebe3b |
290 | pfd_close(pr->s); |
776792d7 |
291 | return 1; |
820ebe3b |
292 | } |
293 | } |
294 | } |
776792d7 |
295 | |
820ebe3b |
296 | /* |
297 | * If we get here without either having done `continue' |
298 | * or `goto connect', it must be because there is no |
299 | * sensible interpretation of what's in our buffer. So |
300 | * close the connection rudely. |
301 | */ |
302 | pfd_close(pr->s); |
303 | return 1; |
304 | } |
305 | return 1; |
306 | |
307 | /* |
308 | * We come here when we're ready to make an actual |
309 | * connection. |
310 | */ |
311 | connect: |
4fba1c1f |
312 | sfree(pr->socksbuf); |
313 | pr->socksbuf = NULL; |
820ebe3b |
314 | |
09d133f3 |
315 | /* |
316 | * Freeze the socket until the SSH server confirms the |
317 | * connection. |
318 | */ |
319 | sk_set_frozen(pr->s, 1); |
320 | |
820ebe3b |
321 | pr->c = new_sock_channel(pr->backhandle, pr->s); |
322 | if (pr->c == NULL) { |
323 | pfd_close(pr->s); |
324 | return 1; |
325 | } else { |
326 | /* asks to forward to the specified host/port for this */ |
327 | ssh_send_port_open(pr->c, pr->hostname, pr->port, "forwarding"); |
328 | } |
329 | pr->dynamic = 0; |
330 | |
331 | /* |
820ebe3b |
332 | * If there's any data remaining in our current buffer, |
333 | * save it to be sent on pfd_confirm(). |
334 | */ |
335 | if (len > 0) { |
336 | pr->buffer = snewn(len, char); |
337 | memcpy(pr->buffer, data, len); |
338 | pr->buflen = len; |
339 | } |
340 | } |
5471d09a |
341 | if (pr->ready) { |
342 | if (sshfwd_write(pr->c, data, len) > 0) { |
343 | pr->throttled = 1; |
344 | sk_set_frozen(pr->s, 1); |
345 | } |
346 | } |
f26d5c33 |
347 | return 1; |
348 | } |
349 | |
5471d09a |
350 | static void pfd_sent(Plug plug, int bufsize) |
351 | { |
352 | struct PFwdPrivate *pr = (struct PFwdPrivate *) plug; |
353 | |
820ebe3b |
354 | if (pr->c) |
355 | sshfwd_unthrottle(pr->c, bufsize); |
5471d09a |
356 | } |
357 | |
f26d5c33 |
358 | /* |
359 | * Called when receiving a PORT OPEN from the server |
360 | */ |
cbe2d68f |
361 | const char *pfd_newconnect(Socket *s, char *hostname, int port, |
4a693cfc |
362 | void *c, Conf *conf, int addressfamily) |
f26d5c33 |
363 | { |
c85623f9 |
364 | static const struct plug_function_table fn_table = { |
7555d6a5 |
365 | pfd_log, |
f26d5c33 |
366 | pfd_closing, |
367 | pfd_receive, |
5471d09a |
368 | pfd_sent, |
f26d5c33 |
369 | NULL |
370 | }; |
371 | |
372 | SockAddr addr; |
cbe2d68f |
373 | const char *err; |
374 | char *dummy_realhost; |
f26d5c33 |
375 | struct PFwdPrivate *pr; |
376 | |
377 | /* |
378 | * Try to find host. |
379 | */ |
4a693cfc |
380 | addr = name_lookup(hostname, port, &dummy_realhost, conf, addressfamily); |
f85e6f6e |
381 | if ((err = sk_addr_error(addr)) != NULL) { |
382 | sk_addr_free(addr); |
53d73c8c |
383 | sfree(dummy_realhost); |
f26d5c33 |
384 | return err; |
f85e6f6e |
385 | } |
f26d5c33 |
386 | |
387 | /* |
388 | * Open socket. |
389 | */ |
4fba1c1f |
390 | pr = new_portfwd_private(); |
f26d5c33 |
391 | pr->fn = &fn_table; |
5471d09a |
392 | pr->throttled = pr->throttle_override = 0; |
f26d5c33 |
393 | pr->ready = 1; |
394 | pr->c = c; |
6b78788a |
395 | pr->backhandle = NULL; /* we shouldn't need this */ |
4b42e4f6 |
396 | pr->dynamic = 0; |
f26d5c33 |
397 | |
e8fa8f62 |
398 | pr->s = *s = new_connection(addr, dummy_realhost, port, |
4a693cfc |
399 | 0, 1, 0, 0, (Plug) pr, conf); |
038ec85e |
400 | sfree(dummy_realhost); |
808c3834 |
401 | if ((err = sk_socket_error(*s)) != NULL) { |
4fba1c1f |
402 | free_portfwd_private(pr); |
f26d5c33 |
403 | return err; |
404 | } |
405 | |
406 | sk_set_private_ptr(*s, pr); |
f26d5c33 |
407 | return NULL; |
408 | } |
409 | |
410 | /* |
411 | called when someone connects to the local port |
412 | */ |
413 | |
f7f9fb5c |
414 | static int pfd_accepting(Plug p, OSSocket sock) |
f26d5c33 |
415 | { |
c85623f9 |
416 | static const struct plug_function_table fn_table = { |
7555d6a5 |
417 | pfd_log, |
f26d5c33 |
418 | pfd_closing, |
419 | pfd_receive, |
5471d09a |
420 | pfd_sent, |
f26d5c33 |
421 | NULL |
422 | }; |
423 | struct PFwdPrivate *pr, *org; |
f26d5c33 |
424 | Socket s; |
cbe2d68f |
425 | const char *err; |
f26d5c33 |
426 | |
f26d5c33 |
427 | org = (struct PFwdPrivate *)p; |
4fba1c1f |
428 | pr = new_portfwd_private(); |
f26d5c33 |
429 | pr->fn = &fn_table; |
430 | |
431 | pr->c = NULL; |
6b78788a |
432 | pr->backhandle = org->backhandle; |
f26d5c33 |
433 | |
434 | pr->s = s = sk_register(sock, (Plug) pr); |
808c3834 |
435 | if ((err = sk_socket_error(s)) != NULL) { |
4fba1c1f |
436 | free_portfwd_private(pr); |
f26d5c33 |
437 | return err != NULL; |
438 | } |
439 | |
820ebe3b |
440 | sk_set_private_ptr(s, pr); |
f26d5c33 |
441 | |
5471d09a |
442 | pr->throttled = pr->throttle_override = 0; |
f26d5c33 |
443 | pr->ready = 0; |
f26d5c33 |
444 | |
820ebe3b |
445 | if (org->dynamic) { |
446 | pr->dynamic = 1; |
b8a98e25 |
447 | pr->port = 0; /* "hostname" buffer is so far empty */ |
820ebe3b |
448 | sk_set_frozen(s, 0); /* we want to receive SOCKS _now_! */ |
f26d5c33 |
449 | } else { |
4b42e4f6 |
450 | pr->dynamic = 0; |
4fba1c1f |
451 | pr->hostname = dupstr(org->hostname); |
820ebe3b |
452 | pr->port = org->port; |
453 | pr->c = new_sock_channel(org->backhandle, s); |
454 | |
455 | if (pr->c == NULL) { |
4fba1c1f |
456 | free_portfwd_private(pr); |
820ebe3b |
457 | return 1; |
458 | } else { |
459 | /* asks to forward to the specified host/port for this */ |
460 | ssh_send_port_open(pr->c, pr->hostname, pr->port, "forwarding"); |
461 | } |
f26d5c33 |
462 | } |
463 | |
464 | return 0; |
465 | } |
466 | |
467 | |
468 | /* Add a new forwarding from port -> desthost:destport |
6ee9b735 |
469 | sets up a listener on the local machine on (srcaddr:)port |
f26d5c33 |
470 | */ |
cbe2d68f |
471 | const char *pfd_addforward(char *desthost, int destport, char *srcaddr, |
4a693cfc |
472 | int port, void *backhandle, Conf *conf, |
05581745 |
473 | void **sockdata, int address_family) |
f26d5c33 |
474 | { |
c85623f9 |
475 | static const struct plug_function_table fn_table = { |
7555d6a5 |
476 | pfd_log, |
f26d5c33 |
477 | pfd_closing, |
5471d09a |
478 | pfd_receive, /* should not happen... */ |
479 | pfd_sent, /* also should not happen */ |
f26d5c33 |
480 | pfd_accepting |
481 | }; |
482 | |
cbe2d68f |
483 | const char *err; |
f26d5c33 |
484 | struct PFwdPrivate *pr; |
485 | Socket s; |
486 | |
487 | /* |
488 | * Open socket. |
489 | */ |
4fba1c1f |
490 | pr = new_portfwd_private(); |
f26d5c33 |
491 | pr->fn = &fn_table; |
492 | pr->c = NULL; |
820ebe3b |
493 | if (desthost) { |
4fba1c1f |
494 | pr->hostname = dupstr(desthost); |
820ebe3b |
495 | pr->port = destport; |
496 | pr->dynamic = 0; |
497 | } else |
498 | pr->dynamic = 1; |
5471d09a |
499 | pr->throttled = pr->throttle_override = 0; |
f26d5c33 |
500 | pr->ready = 0; |
6b78788a |
501 | pr->backhandle = backhandle; |
f26d5c33 |
502 | |
e8fa8f62 |
503 | pr->s = s = new_listener(srcaddr, port, (Plug) pr, |
4a693cfc |
504 | !conf_get_int(conf, CONF_lport_acceptall), |
505 | conf, address_family); |
808c3834 |
506 | if ((err = sk_socket_error(s)) != NULL) { |
4fba1c1f |
507 | free_portfwd_private(pr); |
f26d5c33 |
508 | return err; |
509 | } |
510 | |
511 | sk_set_private_ptr(s, pr); |
512 | |
fda2feb1 |
513 | *sockdata = (void *)s; |
514 | |
f26d5c33 |
515 | return NULL; |
516 | } |
517 | |
518 | void pfd_close(Socket s) |
519 | { |
520 | struct PFwdPrivate *pr; |
521 | |
522 | if (!s) |
523 | return; |
524 | |
525 | pr = (struct PFwdPrivate *) sk_get_private_ptr(s); |
526 | |
4fba1c1f |
527 | free_portfwd_private(pr); |
f26d5c33 |
528 | |
529 | sk_close(s); |
530 | } |
531 | |
fda2feb1 |
532 | /* |
533 | * Terminate a listener. |
534 | */ |
535 | void pfd_terminate(void *sv) |
536 | { |
537 | pfd_close((Socket)sv); |
538 | } |
539 | |
5471d09a |
540 | void pfd_unthrottle(Socket s) |
541 | { |
542 | struct PFwdPrivate *pr; |
543 | if (!s) |
544 | return; |
545 | pr = (struct PFwdPrivate *) sk_get_private_ptr(s); |
546 | |
547 | pr->throttled = 0; |
548 | sk_set_frozen(s, pr->throttled || pr->throttle_override); |
549 | } |
550 | |
551 | void pfd_override_throttle(Socket s, int enable) |
552 | { |
553 | struct PFwdPrivate *pr; |
554 | if (!s) |
555 | return; |
556 | pr = (struct PFwdPrivate *) sk_get_private_ptr(s); |
557 | |
558 | pr->throttle_override = enable; |
559 | sk_set_frozen(s, pr->throttled || pr->throttle_override); |
560 | } |
561 | |
f26d5c33 |
562 | /* |
563 | * Called to send data down the raw connection. |
564 | */ |
5471d09a |
565 | int pfd_send(Socket s, char *data, int len) |
f26d5c33 |
566 | { |
f26d5c33 |
567 | if (s == NULL) |
5471d09a |
568 | return 0; |
569 | return sk_write(s, data, len); |
f26d5c33 |
570 | } |
571 | |
bc06669b |
572 | void pfd_send_eof(Socket s) |
573 | { |
574 | sk_write_eof(s); |
575 | } |
f26d5c33 |
576 | |
577 | void pfd_confirm(Socket s) |
578 | { |
5f2e19fc |
579 | struct PFwdPrivate *pr; |
f26d5c33 |
580 | |
581 | if (s == NULL) |
582 | return; |
583 | |
5f2e19fc |
584 | pr = (struct PFwdPrivate *) sk_get_private_ptr(s); |
f26d5c33 |
585 | pr->ready = 1; |
586 | sk_set_frozen(s, 0); |
587 | sk_write(s, NULL, 0); |
820ebe3b |
588 | if (pr->buffer) { |
589 | sshfwd_write(pr->c, pr->buffer, pr->buflen); |
590 | sfree(pr->buffer); |
591 | pr->buffer = NULL; |
592 | } |
f26d5c33 |
593 | } |