f26d5c33 |
1 | #include <stdio.h> |
2 | #include <stdlib.h> |
3 | |
4 | #include "putty.h" |
5 | #include "ssh.h" |
6 | |
7 | #ifndef FALSE |
8 | #define FALSE 0 |
9 | #endif |
10 | #ifndef TRUE |
11 | #define TRUE 1 |
12 | #endif |
13 | |
14 | #define GET_32BIT_LSB_FIRST(cp) \ |
15 | (((unsigned long)(unsigned char)(cp)[0]) | \ |
16 | ((unsigned long)(unsigned char)(cp)[1] << 8) | \ |
17 | ((unsigned long)(unsigned char)(cp)[2] << 16) | \ |
18 | ((unsigned long)(unsigned char)(cp)[3] << 24)) |
19 | |
20 | #define PUT_32BIT_LSB_FIRST(cp, value) ( \ |
21 | (cp)[0] = (value), \ |
22 | (cp)[1] = (value) >> 8, \ |
23 | (cp)[2] = (value) >> 16, \ |
24 | (cp)[3] = (value) >> 24 ) |
25 | |
26 | #define GET_16BIT_LSB_FIRST(cp) \ |
27 | (((unsigned long)(unsigned char)(cp)[0]) | \ |
28 | ((unsigned long)(unsigned char)(cp)[1] << 8)) |
29 | |
30 | #define PUT_16BIT_LSB_FIRST(cp, value) ( \ |
31 | (cp)[0] = (value), \ |
32 | (cp)[1] = (value) >> 8 ) |
33 | |
34 | #define GET_32BIT_MSB_FIRST(cp) \ |
35 | (((unsigned long)(unsigned char)(cp)[0] << 24) | \ |
36 | ((unsigned long)(unsigned char)(cp)[1] << 16) | \ |
37 | ((unsigned long)(unsigned char)(cp)[2] << 8) | \ |
38 | ((unsigned long)(unsigned char)(cp)[3])) |
39 | |
40 | #define PUT_32BIT_MSB_FIRST(cp, value) ( \ |
41 | (cp)[0] = (value) >> 24, \ |
42 | (cp)[1] = (value) >> 16, \ |
43 | (cp)[2] = (value) >> 8, \ |
44 | (cp)[3] = (value) ) |
45 | |
46 | #define GET_16BIT_MSB_FIRST(cp) \ |
47 | (((unsigned long)(unsigned char)(cp)[0] << 8) | \ |
48 | ((unsigned long)(unsigned char)(cp)[1])) |
49 | |
50 | #define PUT_16BIT_MSB_FIRST(cp, value) ( \ |
51 | (cp)[0] = (value) >> 8, \ |
52 | (cp)[1] = (value) ) |
53 | |
f26d5c33 |
54 | struct PFwdPrivate { |
c85623f9 |
55 | const struct plug_function_table *fn; |
f26d5c33 |
56 | /* the above variable absolutely *must* be the first in this structure */ |
57 | void *c; /* (channel) data used by ssh.c */ |
6b78788a |
58 | void *backhandle; /* instance of SSH backend itself */ |
59 | /* Note that backhandle need not be filled in if c is non-NULL */ |
f26d5c33 |
60 | Socket s; |
5471d09a |
61 | int throttled, throttle_override; |
f26d5c33 |
62 | int ready; |
820ebe3b |
63 | /* |
64 | * `dynamic' does double duty. It's set to 0 for an ordinary |
65 | * forwarded port, and nonzero for SOCKS-style dynamic port |
66 | * forwarding; but it also represents the state of the SOCKS |
67 | * exchange. |
68 | */ |
69 | int dynamic; |
70 | /* |
71 | * `hostname' and `port' are the real hostname and port, once |
72 | * we know what we're connecting to; they're unused for this |
73 | * purpose while conducting a local SOCKS exchange, which means |
74 | * we can also use them as a buffer and pointer for reading |
75 | * data from the SOCKS client. |
76 | */ |
fab893b6 |
77 | char hostname[256+8]; |
820ebe3b |
78 | int port; |
79 | /* |
80 | * When doing dynamic port forwarding, we can receive |
81 | * connection data before we are actually able to send it; so |
82 | * we may have to temporarily hold some in a dynamically |
83 | * allocated buffer here. |
84 | */ |
85 | void *buffer; |
86 | int buflen; |
f26d5c33 |
87 | }; |
88 | |
7555d6a5 |
89 | static void pfd_log(Plug plug, int type, SockAddr addr, int port, |
90 | const char *error_msg, int error_code) |
91 | { |
92 | /* we have to dump these since we have no interface to logging.c */ |
93 | } |
94 | |
cbe2d68f |
95 | static int pfd_closing(Plug plug, const char *error_msg, int error_code, |
f26d5c33 |
96 | int calling_back) |
97 | { |
98 | struct PFwdPrivate *pr = (struct PFwdPrivate *) plug; |
99 | |
100 | /* |
101 | * We have no way to communicate down the forwarded connection, |
102 | * so if an error occurred on the socket, we just ignore it |
103 | * and treat it like a proper close. |
104 | */ |
820ebe3b |
105 | if (pr->c) |
106 | sshfwd_close(pr->c); |
f26d5c33 |
107 | pfd_close(pr->s); |
108 | return 1; |
109 | } |
110 | |
111 | static int pfd_receive(Plug plug, int urgent, char *data, int len) |
112 | { |
113 | struct PFwdPrivate *pr = (struct PFwdPrivate *) plug; |
820ebe3b |
114 | if (pr->dynamic) { |
115 | while (len--) { |
b8a98e25 |
116 | /* |
117 | * Throughout SOCKS negotiation, "hostname" is re-used as a |
118 | * random protocol buffer with "port" storing the length. |
119 | */ |
820ebe3b |
120 | if (pr->port >= lenof(pr->hostname)) { |
04df1251 |
121 | /* Request too long. */ |
820ebe3b |
122 | if ((pr->dynamic >> 12) == 4) { |
123 | /* Send back a SOCKS 4 error before closing. */ |
124 | char data[8]; |
125 | memset(data, 0, sizeof(data)); |
126 | data[1] = 91; /* generic `request rejected' */ |
127 | sk_write(pr->s, data, 8); |
128 | } |
129 | pfd_close(pr->s); |
130 | return 1; |
131 | } |
132 | pr->hostname[pr->port++] = *data++; |
133 | |
134 | /* |
135 | * Now check what's in the buffer to see if it's a |
136 | * valid and complete message in the SOCKS exchange. |
137 | */ |
138 | if ((pr->dynamic == 1 || (pr->dynamic >> 12) == 4) && |
139 | pr->hostname[0] == 4) { |
140 | /* |
141 | * SOCKS 4. |
142 | */ |
143 | if (pr->dynamic == 1) |
144 | pr->dynamic = 0x4000; |
145 | if (pr->port < 2) continue;/* don't have command code yet */ |
146 | if (pr->hostname[1] != 1) { |
b8a98e25 |
147 | /* Not CONNECT. */ |
820ebe3b |
148 | /* Send back a SOCKS 4 error before closing. */ |
149 | char data[8]; |
150 | memset(data, 0, sizeof(data)); |
151 | data[1] = 91; /* generic `request rejected' */ |
152 | sk_write(pr->s, data, 8); |
153 | pfd_close(pr->s); |
154 | return 1; |
155 | } |
b8a98e25 |
156 | if (pr->port <= 8) continue; /* haven't started user/hostname */ |
820ebe3b |
157 | if (pr->hostname[pr->port-1] != 0) |
b8a98e25 |
158 | continue; /* haven't _finished_ user/hostname */ |
820ebe3b |
159 | /* |
160 | * Now we have a full SOCKS 4 request. Check it to |
161 | * see if it's a SOCKS 4A request. |
162 | */ |
163 | if (pr->hostname[4] == 0 && pr->hostname[5] == 0 && |
164 | pr->hostname[6] == 0 && pr->hostname[7] != 0) { |
165 | /* |
166 | * It's SOCKS 4A. So if we haven't yet |
167 | * collected the host name, we should continue |
168 | * waiting for data in order to do so; if we |
169 | * have, we can go ahead. |
170 | */ |
171 | int len; |
172 | if (pr->dynamic == 0x4000) { |
173 | pr->dynamic = 0x4001; |
fab893b6 |
174 | pr->port = 8; /* reset buffer to overwrite name */ |
820ebe3b |
175 | continue; |
176 | } |
177 | pr->hostname[0] = 0; /* reply version code */ |
178 | pr->hostname[1] = 90; /* request granted */ |
179 | sk_write(pr->s, pr->hostname, 8); |
b8a98e25 |
180 | len= pr->port - 8; |
820ebe3b |
181 | pr->port = GET_16BIT_MSB_FIRST(pr->hostname+2); |
fab893b6 |
182 | memmove(pr->hostname, pr->hostname + 8, len); |
820ebe3b |
183 | goto connect; |
184 | } else { |
185 | /* |
186 | * It's SOCKS 4, which means we should format |
187 | * the IP address into the hostname string and |
188 | * then just go. |
189 | */ |
190 | pr->hostname[0] = 0; /* reply version code */ |
191 | pr->hostname[1] = 90; /* request granted */ |
192 | sk_write(pr->s, pr->hostname, 8); |
193 | pr->port = GET_16BIT_MSB_FIRST(pr->hostname+2); |
194 | sprintf(pr->hostname, "%d.%d.%d.%d", |
195 | (unsigned char)pr->hostname[4], |
196 | (unsigned char)pr->hostname[5], |
197 | (unsigned char)pr->hostname[6], |
198 | (unsigned char)pr->hostname[7]); |
199 | goto connect; |
200 | } |
201 | } |
202 | |
203 | if ((pr->dynamic == 1 || (pr->dynamic >> 12) == 5) && |
204 | pr->hostname[0] == 5) { |
205 | /* |
206 | * SOCKS 5. |
207 | */ |
208 | if (pr->dynamic == 1) |
209 | pr->dynamic = 0x5000; |
210 | |
211 | if (pr->dynamic == 0x5000) { |
212 | int i, method; |
213 | char data[2]; |
214 | /* |
215 | * We're receiving a set of method identifiers. |
216 | */ |
217 | if (pr->port < 2) continue;/* no method count yet */ |
218 | if (pr->port < 2 + (unsigned char)pr->hostname[1]) |
219 | continue; /* no methods yet */ |
220 | method = 0xFF; /* invalid */ |
221 | for (i = 0; i < (unsigned char)pr->hostname[1]; i++) |
222 | if (pr->hostname[2+i] == 0) { |
223 | method = 0;/* no auth */ |
224 | break; |
225 | } |
226 | data[0] = 5; |
227 | data[1] = method; |
228 | sk_write(pr->s, data, 2); |
229 | pr->dynamic = 0x5001; |
230 | pr->port = 0; /* re-empty the buffer */ |
231 | continue; |
232 | } |
233 | |
234 | if (pr->dynamic == 0x5001) { |
04df1251 |
235 | /* |
236 | * We're receiving a SOCKS request. |
237 | */ |
238 | unsigned char reply[10]; /* SOCKS5 atyp=1 reply */ |
4797387c |
239 | int atype, alen = 0; |
04df1251 |
240 | |
241 | /* |
242 | * Pre-fill reply packet. |
243 | * In all cases, we set BND.{HOST,ADDR} to 0.0.0.0:0 |
244 | * (atyp=1) in the reply; if we succeed, we don't know |
245 | * the right answers, and if we fail, they should be |
246 | * ignored. |
247 | */ |
248 | memset(reply, 0, lenof(reply)); |
249 | reply[0] = 5; /* VER */ |
250 | reply[3] = 1; /* ATYP = 1 (IPv4, 0.0.0.0:0) */ |
251 | |
820ebe3b |
252 | if (pr->port < 6) continue; |
253 | atype = (unsigned char)pr->hostname[3]; |
254 | if (atype == 1) /* IPv4 address */ |
255 | alen = 4; |
256 | if (atype == 4) /* IPv6 address */ |
257 | alen = 16; |
258 | if (atype == 3) /* domain name has leading length */ |
259 | alen = 1 + (unsigned char)pr->hostname[4]; |
260 | if (pr->port < 6 + alen) continue; |
261 | if (pr->hostname[1] != 1 || pr->hostname[2] != 0) { |
04df1251 |
262 | /* Not CONNECT or reserved field nonzero - error */ |
263 | reply[1] = 1; /* generic failure */ |
776792d7 |
264 | sk_write(pr->s, (char *) reply, lenof(reply)); |
820ebe3b |
265 | pfd_close(pr->s); |
266 | return 1; |
267 | } |
268 | /* |
269 | * Now we have a viable connect request. Switch |
270 | * on atype. |
271 | */ |
272 | pr->port = GET_16BIT_MSB_FIRST(pr->hostname+4+alen); |
273 | if (atype == 1) { |
04df1251 |
274 | /* REP=0 (success) already */ |
776792d7 |
275 | sk_write(pr->s, (char *) reply, lenof(reply)); |
820ebe3b |
276 | sprintf(pr->hostname, "%d.%d.%d.%d", |
277 | (unsigned char)pr->hostname[4], |
278 | (unsigned char)pr->hostname[5], |
279 | (unsigned char)pr->hostname[6], |
280 | (unsigned char)pr->hostname[7]); |
281 | goto connect; |
282 | } else if (atype == 3) { |
04df1251 |
283 | /* REP=0 (success) already */ |
776792d7 |
284 | sk_write(pr->s, (char *) reply, lenof(reply)); |
820ebe3b |
285 | memmove(pr->hostname, pr->hostname + 5, alen-1); |
286 | pr->hostname[alen-1] = '\0'; |
287 | goto connect; |
288 | } else { |
289 | /* |
290 | * Unknown address type. (FIXME: support IPv6!) |
291 | */ |
04df1251 |
292 | reply[1] = 8; /* atype not supported */ |
776792d7 |
293 | sk_write(pr->s, (char *) reply, lenof(reply)); |
820ebe3b |
294 | pfd_close(pr->s); |
776792d7 |
295 | return 1; |
820ebe3b |
296 | } |
297 | } |
298 | } |
776792d7 |
299 | |
820ebe3b |
300 | /* |
301 | * If we get here without either having done `continue' |
302 | * or `goto connect', it must be because there is no |
303 | * sensible interpretation of what's in our buffer. So |
304 | * close the connection rudely. |
305 | */ |
306 | pfd_close(pr->s); |
307 | return 1; |
308 | } |
309 | return 1; |
310 | |
311 | /* |
312 | * We come here when we're ready to make an actual |
313 | * connection. |
314 | */ |
315 | connect: |
316 | |
317 | pr->c = new_sock_channel(pr->backhandle, pr->s); |
318 | if (pr->c == NULL) { |
319 | pfd_close(pr->s); |
320 | return 1; |
321 | } else { |
322 | /* asks to forward to the specified host/port for this */ |
323 | ssh_send_port_open(pr->c, pr->hostname, pr->port, "forwarding"); |
324 | } |
325 | pr->dynamic = 0; |
326 | |
327 | /* |
328 | * Now freeze the socket until the SSH server confirms the |
329 | * connection. |
330 | */ |
331 | sk_set_frozen(pr->s, 1); |
332 | /* |
333 | * If there's any data remaining in our current buffer, |
334 | * save it to be sent on pfd_confirm(). |
335 | */ |
336 | if (len > 0) { |
337 | pr->buffer = snewn(len, char); |
338 | memcpy(pr->buffer, data, len); |
339 | pr->buflen = len; |
340 | } |
341 | } |
5471d09a |
342 | if (pr->ready) { |
343 | if (sshfwd_write(pr->c, data, len) > 0) { |
344 | pr->throttled = 1; |
345 | sk_set_frozen(pr->s, 1); |
346 | } |
347 | } |
f26d5c33 |
348 | return 1; |
349 | } |
350 | |
5471d09a |
351 | static void pfd_sent(Plug plug, int bufsize) |
352 | { |
353 | struct PFwdPrivate *pr = (struct PFwdPrivate *) plug; |
354 | |
820ebe3b |
355 | if (pr->c) |
356 | sshfwd_unthrottle(pr->c, bufsize); |
5471d09a |
357 | } |
358 | |
f26d5c33 |
359 | /* |
360 | * Called when receiving a PORT OPEN from the server |
361 | */ |
cbe2d68f |
362 | const char *pfd_newconnect(Socket *s, char *hostname, int port, |
05581745 |
363 | void *c, const Config *cfg, int addressfamily) |
f26d5c33 |
364 | { |
c85623f9 |
365 | static const struct plug_function_table fn_table = { |
7555d6a5 |
366 | pfd_log, |
f26d5c33 |
367 | pfd_closing, |
368 | pfd_receive, |
5471d09a |
369 | pfd_sent, |
f26d5c33 |
370 | NULL |
371 | }; |
372 | |
373 | SockAddr addr; |
cbe2d68f |
374 | const char *err; |
375 | char *dummy_realhost; |
f26d5c33 |
376 | struct PFwdPrivate *pr; |
377 | |
378 | /* |
379 | * Try to find host. |
380 | */ |
05581745 |
381 | addr = name_lookup(hostname, port, &dummy_realhost, cfg, addressfamily); |
f85e6f6e |
382 | if ((err = sk_addr_error(addr)) != NULL) { |
383 | sk_addr_free(addr); |
f26d5c33 |
384 | return err; |
f85e6f6e |
385 | } |
f26d5c33 |
386 | |
387 | /* |
388 | * Open socket. |
389 | */ |
3d88e64d |
390 | pr = snew(struct PFwdPrivate); |
820ebe3b |
391 | pr->buffer = NULL; |
f26d5c33 |
392 | pr->fn = &fn_table; |
5471d09a |
393 | pr->throttled = pr->throttle_override = 0; |
f26d5c33 |
394 | pr->ready = 1; |
395 | pr->c = c; |
6b78788a |
396 | pr->backhandle = NULL; /* we shouldn't need this */ |
4b42e4f6 |
397 | pr->dynamic = 0; |
f26d5c33 |
398 | |
e8fa8f62 |
399 | pr->s = *s = new_connection(addr, dummy_realhost, port, |
79bf227b |
400 | 0, 1, 0, 0, (Plug) pr, cfg); |
808c3834 |
401 | if ((err = sk_socket_error(*s)) != NULL) { |
f26d5c33 |
402 | sfree(pr); |
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; |
3d88e64d |
428 | pr = snew(struct PFwdPrivate); |
820ebe3b |
429 | pr->buffer = NULL; |
f26d5c33 |
430 | pr->fn = &fn_table; |
431 | |
432 | pr->c = NULL; |
6b78788a |
433 | pr->backhandle = org->backhandle; |
f26d5c33 |
434 | |
435 | pr->s = s = sk_register(sock, (Plug) pr); |
808c3834 |
436 | if ((err = sk_socket_error(s)) != NULL) { |
f26d5c33 |
437 | sfree(pr); |
438 | return err != NULL; |
439 | } |
440 | |
820ebe3b |
441 | sk_set_private_ptr(s, pr); |
f26d5c33 |
442 | |
5471d09a |
443 | pr->throttled = pr->throttle_override = 0; |
f26d5c33 |
444 | pr->ready = 0; |
f26d5c33 |
445 | |
820ebe3b |
446 | if (org->dynamic) { |
447 | pr->dynamic = 1; |
b8a98e25 |
448 | pr->port = 0; /* "hostname" buffer is so far empty */ |
820ebe3b |
449 | sk_set_frozen(s, 0); /* we want to receive SOCKS _now_! */ |
f26d5c33 |
450 | } else { |
4b42e4f6 |
451 | pr->dynamic = 0; |
820ebe3b |
452 | strcpy(pr->hostname, org->hostname); |
453 | pr->port = org->port; |
454 | pr->c = new_sock_channel(org->backhandle, s); |
455 | |
456 | if (pr->c == NULL) { |
457 | sfree(pr); |
458 | return 1; |
459 | } else { |
460 | /* asks to forward to the specified host/port for this */ |
461 | ssh_send_port_open(pr->c, pr->hostname, pr->port, "forwarding"); |
462 | } |
f26d5c33 |
463 | } |
464 | |
465 | return 0; |
466 | } |
467 | |
468 | |
469 | /* Add a new forwarding from port -> desthost:destport |
6ee9b735 |
470 | sets up a listener on the local machine on (srcaddr:)port |
f26d5c33 |
471 | */ |
cbe2d68f |
472 | const char *pfd_addforward(char *desthost, int destport, char *srcaddr, |
fda2feb1 |
473 | int port, void *backhandle, const Config *cfg, |
05581745 |
474 | void **sockdata, int address_family) |
f26d5c33 |
475 | { |
c85623f9 |
476 | static const struct plug_function_table fn_table = { |
7555d6a5 |
477 | pfd_log, |
f26d5c33 |
478 | pfd_closing, |
5471d09a |
479 | pfd_receive, /* should not happen... */ |
480 | pfd_sent, /* also should not happen */ |
f26d5c33 |
481 | pfd_accepting |
482 | }; |
483 | |
cbe2d68f |
484 | const char *err; |
f26d5c33 |
485 | struct PFwdPrivate *pr; |
486 | Socket s; |
487 | |
488 | /* |
489 | * Open socket. |
490 | */ |
3d88e64d |
491 | pr = snew(struct PFwdPrivate); |
820ebe3b |
492 | pr->buffer = NULL; |
f26d5c33 |
493 | pr->fn = &fn_table; |
494 | pr->c = NULL; |
820ebe3b |
495 | if (desthost) { |
496 | strcpy(pr->hostname, desthost); |
497 | pr->port = destport; |
498 | pr->dynamic = 0; |
499 | } else |
500 | pr->dynamic = 1; |
5471d09a |
501 | pr->throttled = pr->throttle_override = 0; |
f26d5c33 |
502 | pr->ready = 0; |
6b78788a |
503 | pr->backhandle = backhandle; |
f26d5c33 |
504 | |
e8fa8f62 |
505 | pr->s = s = new_listener(srcaddr, port, (Plug) pr, |
05581745 |
506 | !cfg->lport_acceptall, cfg, address_family); |
808c3834 |
507 | if ((err = sk_socket_error(s)) != NULL) { |
f26d5c33 |
508 | sfree(pr); |
509 | return err; |
510 | } |
511 | |
512 | sk_set_private_ptr(s, pr); |
513 | |
fda2feb1 |
514 | *sockdata = (void *)s; |
515 | |
f26d5c33 |
516 | return NULL; |
517 | } |
518 | |
519 | void pfd_close(Socket s) |
520 | { |
521 | struct PFwdPrivate *pr; |
522 | |
523 | if (!s) |
524 | return; |
525 | |
526 | pr = (struct PFwdPrivate *) sk_get_private_ptr(s); |
527 | |
820ebe3b |
528 | sfree(pr->buffer); |
f26d5c33 |
529 | sfree(pr); |
530 | |
531 | sk_close(s); |
532 | } |
533 | |
fda2feb1 |
534 | /* |
535 | * Terminate a listener. |
536 | */ |
537 | void pfd_terminate(void *sv) |
538 | { |
539 | pfd_close((Socket)sv); |
540 | } |
541 | |
5471d09a |
542 | void pfd_unthrottle(Socket s) |
543 | { |
544 | struct PFwdPrivate *pr; |
545 | if (!s) |
546 | return; |
547 | pr = (struct PFwdPrivate *) sk_get_private_ptr(s); |
548 | |
549 | pr->throttled = 0; |
550 | sk_set_frozen(s, pr->throttled || pr->throttle_override); |
551 | } |
552 | |
553 | void pfd_override_throttle(Socket s, int enable) |
554 | { |
555 | struct PFwdPrivate *pr; |
556 | if (!s) |
557 | return; |
558 | pr = (struct PFwdPrivate *) sk_get_private_ptr(s); |
559 | |
560 | pr->throttle_override = enable; |
561 | sk_set_frozen(s, pr->throttled || pr->throttle_override); |
562 | } |
563 | |
f26d5c33 |
564 | /* |
565 | * Called to send data down the raw connection. |
566 | */ |
5471d09a |
567 | int pfd_send(Socket s, char *data, int len) |
f26d5c33 |
568 | { |
f26d5c33 |
569 | if (s == NULL) |
5471d09a |
570 | return 0; |
571 | return sk_write(s, data, len); |
f26d5c33 |
572 | } |
573 | |
574 | |
575 | void pfd_confirm(Socket s) |
576 | { |
5f2e19fc |
577 | struct PFwdPrivate *pr; |
f26d5c33 |
578 | |
579 | if (s == NULL) |
580 | return; |
581 | |
5f2e19fc |
582 | pr = (struct PFwdPrivate *) sk_get_private_ptr(s); |
f26d5c33 |
583 | pr->ready = 1; |
584 | sk_set_frozen(s, 0); |
585 | sk_write(s, NULL, 0); |
820ebe3b |
586 | if (pr->buffer) { |
587 | sshfwd_write(pr->c, pr->buffer, pr->buflen); |
588 | sfree(pr->buffer); |
589 | pr->buffer = NULL; |
590 | } |
f26d5c33 |
591 | } |