1 | /***************************************************************************
|
---|
2 | * _ _ ____ _
|
---|
3 | * Project ___| | | | _ \| |
|
---|
4 | * / __| | | | |_) | |
|
---|
5 | * | (__| |_| | _ <| |___
|
---|
6 | * \___|\___/|_| \_\_____|
|
---|
7 | *
|
---|
8 | * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
|
---|
9 | *
|
---|
10 | * This software is licensed as described in the file COPYING, which
|
---|
11 | * you should have received as part of this distribution. The terms
|
---|
12 | * are also available at https://curl.haxx.se/docs/copyright.html.
|
---|
13 | *
|
---|
14 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell
|
---|
15 | * copies of the Software, and permit persons to whom the Software is
|
---|
16 | * furnished to do so, under the terms of the COPYING file.
|
---|
17 | *
|
---|
18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
---|
19 | * KIND, either express or implied.
|
---|
20 | *
|
---|
21 | ***************************************************************************/
|
---|
22 |
|
---|
23 | #include "curl_setup.h"
|
---|
24 |
|
---|
25 | #ifndef CURL_DISABLE_TELNET
|
---|
26 |
|
---|
27 | #ifdef HAVE_NETINET_IN_H
|
---|
28 | #include <netinet/in.h>
|
---|
29 | #endif
|
---|
30 | #ifdef HAVE_NETDB_H
|
---|
31 | #include <netdb.h>
|
---|
32 | #endif
|
---|
33 | #ifdef HAVE_ARPA_INET_H
|
---|
34 | #include <arpa/inet.h>
|
---|
35 | #endif
|
---|
36 | #ifdef HAVE_NET_IF_H
|
---|
37 | #include <net/if.h>
|
---|
38 | #endif
|
---|
39 | #ifdef HAVE_SYS_IOCTL_H
|
---|
40 | #include <sys/ioctl.h>
|
---|
41 | #endif
|
---|
42 |
|
---|
43 | #ifdef HAVE_SYS_PARAM_H
|
---|
44 | #include <sys/param.h>
|
---|
45 | #endif
|
---|
46 |
|
---|
47 | #include "urldata.h"
|
---|
48 | #include <curl/curl.h>
|
---|
49 | #include "transfer.h"
|
---|
50 | #include "sendf.h"
|
---|
51 | #include "telnet.h"
|
---|
52 | #include "connect.h"
|
---|
53 | #include "progress.h"
|
---|
54 | #include "system_win32.h"
|
---|
55 |
|
---|
56 | #define TELOPTS
|
---|
57 | #define TELCMDS
|
---|
58 |
|
---|
59 | #include "arpa_telnet.h"
|
---|
60 | #include "select.h"
|
---|
61 | #include "strcase.h"
|
---|
62 | #include "warnless.h"
|
---|
63 |
|
---|
64 | /* The last 3 #include files should be in this order */
|
---|
65 | #include "curl_printf.h"
|
---|
66 | #include "curl_memory.h"
|
---|
67 | #include "memdebug.h"
|
---|
68 |
|
---|
69 | #define SUBBUFSIZE 512
|
---|
70 |
|
---|
71 | #define CURL_SB_CLEAR(x) x->subpointer = x->subbuffer
|
---|
72 | #define CURL_SB_TERM(x) \
|
---|
73 | do { \
|
---|
74 | x->subend = x->subpointer; \
|
---|
75 | CURL_SB_CLEAR(x); \
|
---|
76 | } WHILE_FALSE
|
---|
77 | #define CURL_SB_ACCUM(x,c) \
|
---|
78 | do { \
|
---|
79 | if(x->subpointer < (x->subbuffer + sizeof x->subbuffer)) \
|
---|
80 | *x->subpointer++ = (c); \
|
---|
81 | } WHILE_FALSE
|
---|
82 |
|
---|
83 | #define CURL_SB_GET(x) ((*x->subpointer++)&0xff)
|
---|
84 | #define CURL_SB_LEN(x) (x->subend - x->subpointer)
|
---|
85 |
|
---|
86 | /* For posterity:
|
---|
87 | #define CURL_SB_PEEK(x) ((*x->subpointer)&0xff)
|
---|
88 | #define CURL_SB_EOF(x) (x->subpointer >= x->subend) */
|
---|
89 |
|
---|
90 | #ifdef CURL_DISABLE_VERBOSE_STRINGS
|
---|
91 | #define printoption(a,b,c,d) Curl_nop_stmt
|
---|
92 | #endif
|
---|
93 |
|
---|
94 | #ifdef USE_WINSOCK
|
---|
95 | typedef FARPROC WSOCK2_FUNC;
|
---|
96 | static CURLcode check_wsock2(struct Curl_easy *data);
|
---|
97 | #endif
|
---|
98 |
|
---|
99 | static
|
---|
100 | CURLcode telrcv(struct connectdata *,
|
---|
101 | const unsigned char *inbuf, /* Data received from socket */
|
---|
102 | ssize_t count); /* Number of bytes received */
|
---|
103 |
|
---|
104 | #ifndef CURL_DISABLE_VERBOSE_STRINGS
|
---|
105 | static void printoption(struct Curl_easy *data,
|
---|
106 | const char *direction,
|
---|
107 | int cmd, int option);
|
---|
108 | #endif
|
---|
109 |
|
---|
110 | static void negotiate(struct connectdata *);
|
---|
111 | static void send_negotiation(struct connectdata *, int cmd, int option);
|
---|
112 | static void set_local_option(struct connectdata *, int cmd, int option);
|
---|
113 | static void set_remote_option(struct connectdata *, int cmd, int option);
|
---|
114 |
|
---|
115 | static void printsub(struct Curl_easy *data,
|
---|
116 | int direction, unsigned char *pointer,
|
---|
117 | size_t length);
|
---|
118 | static void suboption(struct connectdata *);
|
---|
119 | static void sendsuboption(struct connectdata *conn, int option);
|
---|
120 |
|
---|
121 | static CURLcode telnet_do(struct connectdata *conn, bool *done);
|
---|
122 | static CURLcode telnet_done(struct connectdata *conn,
|
---|
123 | CURLcode, bool premature);
|
---|
124 | static CURLcode send_telnet_data(struct connectdata *conn,
|
---|
125 | char *buffer, ssize_t nread);
|
---|
126 |
|
---|
127 | /* For negotiation compliant to RFC 1143 */
|
---|
128 | #define CURL_NO 0
|
---|
129 | #define CURL_YES 1
|
---|
130 | #define CURL_WANTYES 2
|
---|
131 | #define CURL_WANTNO 3
|
---|
132 |
|
---|
133 | #define CURL_EMPTY 0
|
---|
134 | #define CURL_OPPOSITE 1
|
---|
135 |
|
---|
136 | /*
|
---|
137 | * Telnet receiver states for fsm
|
---|
138 | */
|
---|
139 | typedef enum
|
---|
140 | {
|
---|
141 | CURL_TS_DATA = 0,
|
---|
142 | CURL_TS_IAC,
|
---|
143 | CURL_TS_WILL,
|
---|
144 | CURL_TS_WONT,
|
---|
145 | CURL_TS_DO,
|
---|
146 | CURL_TS_DONT,
|
---|
147 | CURL_TS_CR,
|
---|
148 | CURL_TS_SB, /* sub-option collection */
|
---|
149 | CURL_TS_SE /* looking for sub-option end */
|
---|
150 | } TelnetReceive;
|
---|
151 |
|
---|
152 | struct TELNET {
|
---|
153 | int please_negotiate;
|
---|
154 | int already_negotiated;
|
---|
155 | int us[256];
|
---|
156 | int usq[256];
|
---|
157 | int us_preferred[256];
|
---|
158 | int him[256];
|
---|
159 | int himq[256];
|
---|
160 | int him_preferred[256];
|
---|
161 | int subnegotiation[256];
|
---|
162 | char subopt_ttype[32]; /* Set with suboption TTYPE */
|
---|
163 | char subopt_xdisploc[128]; /* Set with suboption XDISPLOC */
|
---|
164 | unsigned short subopt_wsx; /* Set with suboption NAWS */
|
---|
165 | unsigned short subopt_wsy; /* Set with suboption NAWS */
|
---|
166 | struct curl_slist *telnet_vars; /* Environment variables */
|
---|
167 |
|
---|
168 | /* suboptions */
|
---|
169 | unsigned char subbuffer[SUBBUFSIZE];
|
---|
170 | unsigned char *subpointer, *subend; /* buffer for sub-options */
|
---|
171 |
|
---|
172 | TelnetReceive telrcv_state;
|
---|
173 | };
|
---|
174 |
|
---|
175 |
|
---|
176 | /*
|
---|
177 | * TELNET protocol handler.
|
---|
178 | */
|
---|
179 |
|
---|
180 | const struct Curl_handler Curl_handler_telnet = {
|
---|
181 | "TELNET", /* scheme */
|
---|
182 | ZERO_NULL, /* setup_connection */
|
---|
183 | telnet_do, /* do_it */
|
---|
184 | telnet_done, /* done */
|
---|
185 | ZERO_NULL, /* do_more */
|
---|
186 | ZERO_NULL, /* connect_it */
|
---|
187 | ZERO_NULL, /* connecting */
|
---|
188 | ZERO_NULL, /* doing */
|
---|
189 | ZERO_NULL, /* proto_getsock */
|
---|
190 | ZERO_NULL, /* doing_getsock */
|
---|
191 | ZERO_NULL, /* domore_getsock */
|
---|
192 | ZERO_NULL, /* perform_getsock */
|
---|
193 | ZERO_NULL, /* disconnect */
|
---|
194 | ZERO_NULL, /* readwrite */
|
---|
195 | ZERO_NULL, /* connection_check */
|
---|
196 | PORT_TELNET, /* defport */
|
---|
197 | CURLPROTO_TELNET, /* protocol */
|
---|
198 | PROTOPT_NONE | PROTOPT_NOURLQUERY /* flags */
|
---|
199 | };
|
---|
200 |
|
---|
201 |
|
---|
202 | #ifdef USE_WINSOCK
|
---|
203 | static CURLcode
|
---|
204 | check_wsock2(struct Curl_easy *data)
|
---|
205 | {
|
---|
206 | int err;
|
---|
207 | WORD wVersionRequested;
|
---|
208 | WSADATA wsaData;
|
---|
209 |
|
---|
210 | DEBUGASSERT(data);
|
---|
211 |
|
---|
212 | /* telnet requires at least WinSock 2.0 so ask for it. */
|
---|
213 | wVersionRequested = MAKEWORD(2, 0);
|
---|
214 |
|
---|
215 | err = WSAStartup(wVersionRequested, &wsaData);
|
---|
216 |
|
---|
217 | /* We must've called this once already, so this call */
|
---|
218 | /* should always succeed. But, just in case... */
|
---|
219 | if(err != 0) {
|
---|
220 | failf(data,"WSAStartup failed (%d)",err);
|
---|
221 | return CURLE_FAILED_INIT;
|
---|
222 | }
|
---|
223 |
|
---|
224 | /* We have to have a WSACleanup call for every successful */
|
---|
225 | /* WSAStartup call. */
|
---|
226 | WSACleanup();
|
---|
227 |
|
---|
228 | /* Check that our version is supported */
|
---|
229 | if(LOBYTE(wsaData.wVersion) != LOBYTE(wVersionRequested) ||
|
---|
230 | HIBYTE(wsaData.wVersion) != HIBYTE(wVersionRequested)) {
|
---|
231 | /* Our version isn't supported */
|
---|
232 | failf(data, "insufficient winsock version to support "
|
---|
233 | "telnet");
|
---|
234 | return CURLE_FAILED_INIT;
|
---|
235 | }
|
---|
236 |
|
---|
237 | /* Our version is supported */
|
---|
238 | return CURLE_OK;
|
---|
239 | }
|
---|
240 | #endif
|
---|
241 |
|
---|
242 | static
|
---|
243 | CURLcode init_telnet(struct connectdata *conn)
|
---|
244 | {
|
---|
245 | struct TELNET *tn;
|
---|
246 |
|
---|
247 | tn = calloc(1, sizeof(struct TELNET));
|
---|
248 | if(!tn)
|
---|
249 | return CURLE_OUT_OF_MEMORY;
|
---|
250 |
|
---|
251 | conn->data->req.protop = tn; /* make us known */
|
---|
252 |
|
---|
253 | tn->telrcv_state = CURL_TS_DATA;
|
---|
254 |
|
---|
255 | /* Init suboptions */
|
---|
256 | CURL_SB_CLEAR(tn);
|
---|
257 |
|
---|
258 | /* Set the options we want by default */
|
---|
259 | tn->us_preferred[CURL_TELOPT_SGA] = CURL_YES;
|
---|
260 | tn->him_preferred[CURL_TELOPT_SGA] = CURL_YES;
|
---|
261 |
|
---|
262 | /* To be compliant with previous releases of libcurl
|
---|
263 | we enable this option by default. This behaviour
|
---|
264 | can be changed thanks to the "BINARY" option in
|
---|
265 | CURLOPT_TELNETOPTIONS
|
---|
266 | */
|
---|
267 | tn->us_preferred[CURL_TELOPT_BINARY] = CURL_YES;
|
---|
268 | tn->him_preferred[CURL_TELOPT_BINARY] = CURL_YES;
|
---|
269 |
|
---|
270 | /* We must allow the server to echo what we sent
|
---|
271 | but it is not necessary to request the server
|
---|
272 | to do so (it might forces the server to close
|
---|
273 | the connection). Hence, we ignore ECHO in the
|
---|
274 | negotiate function
|
---|
275 | */
|
---|
276 | tn->him_preferred[CURL_TELOPT_ECHO] = CURL_YES;
|
---|
277 |
|
---|
278 | /* Set the subnegotiation fields to send information
|
---|
279 | just after negotiation passed (do/will)
|
---|
280 |
|
---|
281 | Default values are (0,0) initialized by calloc.
|
---|
282 | According to the RFC1013 it is valid:
|
---|
283 | A value equal to zero is acceptable for the width (or height),
|
---|
284 | and means that no character width (or height) is being sent.
|
---|
285 | In this case, the width (or height) that will be assumed by the
|
---|
286 | Telnet server is operating system specific (it will probably be
|
---|
287 | based upon the terminal type information that may have been sent
|
---|
288 | using the TERMINAL TYPE Telnet option). */
|
---|
289 | tn->subnegotiation[CURL_TELOPT_NAWS] = CURL_YES;
|
---|
290 | return CURLE_OK;
|
---|
291 | }
|
---|
292 |
|
---|
293 | static void negotiate(struct connectdata *conn)
|
---|
294 | {
|
---|
295 | int i;
|
---|
296 | struct TELNET *tn = (struct TELNET *) conn->data->req.protop;
|
---|
297 |
|
---|
298 | for(i = 0; i < CURL_NTELOPTS; i++) {
|
---|
299 | if(i == CURL_TELOPT_ECHO)
|
---|
300 | continue;
|
---|
301 |
|
---|
302 | if(tn->us_preferred[i] == CURL_YES)
|
---|
303 | set_local_option(conn, i, CURL_YES);
|
---|
304 |
|
---|
305 | if(tn->him_preferred[i] == CURL_YES)
|
---|
306 | set_remote_option(conn, i, CURL_YES);
|
---|
307 | }
|
---|
308 | }
|
---|
309 |
|
---|
310 | #ifndef CURL_DISABLE_VERBOSE_STRINGS
|
---|
311 | static void printoption(struct Curl_easy *data,
|
---|
312 | const char *direction, int cmd, int option)
|
---|
313 | {
|
---|
314 | const char *fmt;
|
---|
315 | const char *opt;
|
---|
316 |
|
---|
317 | if(data->set.verbose) {
|
---|
318 | if(cmd == CURL_IAC) {
|
---|
319 | if(CURL_TELCMD_OK(option))
|
---|
320 | infof(data, "%s IAC %s\n", direction, CURL_TELCMD(option));
|
---|
321 | else
|
---|
322 | infof(data, "%s IAC %d\n", direction, option);
|
---|
323 | }
|
---|
324 | else {
|
---|
325 | fmt = (cmd == CURL_WILL) ? "WILL" : (cmd == CURL_WONT) ? "WONT" :
|
---|
326 | (cmd == CURL_DO) ? "DO" : (cmd == CURL_DONT) ? "DONT" : 0;
|
---|
327 | if(fmt) {
|
---|
328 | if(CURL_TELOPT_OK(option))
|
---|
329 | opt = CURL_TELOPT(option);
|
---|
330 | else if(option == CURL_TELOPT_EXOPL)
|
---|
331 | opt = "EXOPL";
|
---|
332 | else
|
---|
333 | opt = NULL;
|
---|
334 |
|
---|
335 | if(opt)
|
---|
336 | infof(data, "%s %s %s\n", direction, fmt, opt);
|
---|
337 | else
|
---|
338 | infof(data, "%s %s %d\n", direction, fmt, option);
|
---|
339 | }
|
---|
340 | else
|
---|
341 | infof(data, "%s %d %d\n", direction, cmd, option);
|
---|
342 | }
|
---|
343 | }
|
---|
344 | }
|
---|
345 | #endif
|
---|
346 |
|
---|
347 | static void send_negotiation(struct connectdata *conn, int cmd, int option)
|
---|
348 | {
|
---|
349 | unsigned char buf[3];
|
---|
350 | ssize_t bytes_written;
|
---|
351 | int err;
|
---|
352 | struct Curl_easy *data = conn->data;
|
---|
353 |
|
---|
354 | buf[0] = CURL_IAC;
|
---|
355 | buf[1] = (unsigned char)cmd;
|
---|
356 | buf[2] = (unsigned char)option;
|
---|
357 |
|
---|
358 | bytes_written = swrite(conn->sock[FIRSTSOCKET], buf, 3);
|
---|
359 | if(bytes_written < 0) {
|
---|
360 | err = SOCKERRNO;
|
---|
361 | failf(data,"Sending data failed (%d)",err);
|
---|
362 | }
|
---|
363 |
|
---|
364 | printoption(conn->data, "SENT", cmd, option);
|
---|
365 | }
|
---|
366 |
|
---|
367 | static
|
---|
368 | void set_remote_option(struct connectdata *conn, int option, int newstate)
|
---|
369 | {
|
---|
370 | struct TELNET *tn = (struct TELNET *)conn->data->req.protop;
|
---|
371 | if(newstate == CURL_YES) {
|
---|
372 | switch(tn->him[option]) {
|
---|
373 | case CURL_NO:
|
---|
374 | tn->him[option] = CURL_WANTYES;
|
---|
375 | send_negotiation(conn, CURL_DO, option);
|
---|
376 | break;
|
---|
377 |
|
---|
378 | case CURL_YES:
|
---|
379 | /* Already enabled */
|
---|
380 | break;
|
---|
381 |
|
---|
382 | case CURL_WANTNO:
|
---|
383 | switch(tn->himq[option]) {
|
---|
384 | case CURL_EMPTY:
|
---|
385 | /* Already negotiating for CURL_YES, queue the request */
|
---|
386 | tn->himq[option] = CURL_OPPOSITE;
|
---|
387 | break;
|
---|
388 | case CURL_OPPOSITE:
|
---|
389 | /* Error: already queued an enable request */
|
---|
390 | break;
|
---|
391 | }
|
---|
392 | break;
|
---|
393 |
|
---|
394 | case CURL_WANTYES:
|
---|
395 | switch(tn->himq[option]) {
|
---|
396 | case CURL_EMPTY:
|
---|
397 | /* Error: already negotiating for enable */
|
---|
398 | break;
|
---|
399 | case CURL_OPPOSITE:
|
---|
400 | tn->himq[option] = CURL_EMPTY;
|
---|
401 | break;
|
---|
402 | }
|
---|
403 | break;
|
---|
404 | }
|
---|
405 | }
|
---|
406 | else { /* NO */
|
---|
407 | switch(tn->him[option]) {
|
---|
408 | case CURL_NO:
|
---|
409 | /* Already disabled */
|
---|
410 | break;
|
---|
411 |
|
---|
412 | case CURL_YES:
|
---|
413 | tn->him[option] = CURL_WANTNO;
|
---|
414 | send_negotiation(conn, CURL_DONT, option);
|
---|
415 | break;
|
---|
416 |
|
---|
417 | case CURL_WANTNO:
|
---|
418 | switch(tn->himq[option]) {
|
---|
419 | case CURL_EMPTY:
|
---|
420 | /* Already negotiating for NO */
|
---|
421 | break;
|
---|
422 | case CURL_OPPOSITE:
|
---|
423 | tn->himq[option] = CURL_EMPTY;
|
---|
424 | break;
|
---|
425 | }
|
---|
426 | break;
|
---|
427 |
|
---|
428 | case CURL_WANTYES:
|
---|
429 | switch(tn->himq[option]) {
|
---|
430 | case CURL_EMPTY:
|
---|
431 | tn->himq[option] = CURL_OPPOSITE;
|
---|
432 | break;
|
---|
433 | case CURL_OPPOSITE:
|
---|
434 | break;
|
---|
435 | }
|
---|
436 | break;
|
---|
437 | }
|
---|
438 | }
|
---|
439 | }
|
---|
440 |
|
---|
441 | static
|
---|
442 | void rec_will(struct connectdata *conn, int option)
|
---|
443 | {
|
---|
444 | struct TELNET *tn = (struct TELNET *)conn->data->req.protop;
|
---|
445 | switch(tn->him[option]) {
|
---|
446 | case CURL_NO:
|
---|
447 | if(tn->him_preferred[option] == CURL_YES) {
|
---|
448 | tn->him[option] = CURL_YES;
|
---|
449 | send_negotiation(conn, CURL_DO, option);
|
---|
450 | }
|
---|
451 | else
|
---|
452 | send_negotiation(conn, CURL_DONT, option);
|
---|
453 |
|
---|
454 | break;
|
---|
455 |
|
---|
456 | case CURL_YES:
|
---|
457 | /* Already enabled */
|
---|
458 | break;
|
---|
459 |
|
---|
460 | case CURL_WANTNO:
|
---|
461 | switch(tn->himq[option]) {
|
---|
462 | case CURL_EMPTY:
|
---|
463 | /* Error: DONT answered by WILL */
|
---|
464 | tn->him[option] = CURL_NO;
|
---|
465 | break;
|
---|
466 | case CURL_OPPOSITE:
|
---|
467 | /* Error: DONT answered by WILL */
|
---|
468 | tn->him[option] = CURL_YES;
|
---|
469 | tn->himq[option] = CURL_EMPTY;
|
---|
470 | break;
|
---|
471 | }
|
---|
472 | break;
|
---|
473 |
|
---|
474 | case CURL_WANTYES:
|
---|
475 | switch(tn->himq[option]) {
|
---|
476 | case CURL_EMPTY:
|
---|
477 | tn->him[option] = CURL_YES;
|
---|
478 | break;
|
---|
479 | case CURL_OPPOSITE:
|
---|
480 | tn->him[option] = CURL_WANTNO;
|
---|
481 | tn->himq[option] = CURL_EMPTY;
|
---|
482 | send_negotiation(conn, CURL_DONT, option);
|
---|
483 | break;
|
---|
484 | }
|
---|
485 | break;
|
---|
486 | }
|
---|
487 | }
|
---|
488 |
|
---|
489 | static
|
---|
490 | void rec_wont(struct connectdata *conn, int option)
|
---|
491 | {
|
---|
492 | struct TELNET *tn = (struct TELNET *)conn->data->req.protop;
|
---|
493 | switch(tn->him[option]) {
|
---|
494 | case CURL_NO:
|
---|
495 | /* Already disabled */
|
---|
496 | break;
|
---|
497 |
|
---|
498 | case CURL_YES:
|
---|
499 | tn->him[option] = CURL_NO;
|
---|
500 | send_negotiation(conn, CURL_DONT, option);
|
---|
501 | break;
|
---|
502 |
|
---|
503 | case CURL_WANTNO:
|
---|
504 | switch(tn->himq[option]) {
|
---|
505 | case CURL_EMPTY:
|
---|
506 | tn->him[option] = CURL_NO;
|
---|
507 | break;
|
---|
508 |
|
---|
509 | case CURL_OPPOSITE:
|
---|
510 | tn->him[option] = CURL_WANTYES;
|
---|
511 | tn->himq[option] = CURL_EMPTY;
|
---|
512 | send_negotiation(conn, CURL_DO, option);
|
---|
513 | break;
|
---|
514 | }
|
---|
515 | break;
|
---|
516 |
|
---|
517 | case CURL_WANTYES:
|
---|
518 | switch(tn->himq[option]) {
|
---|
519 | case CURL_EMPTY:
|
---|
520 | tn->him[option] = CURL_NO;
|
---|
521 | break;
|
---|
522 | case CURL_OPPOSITE:
|
---|
523 | tn->him[option] = CURL_NO;
|
---|
524 | tn->himq[option] = CURL_EMPTY;
|
---|
525 | break;
|
---|
526 | }
|
---|
527 | break;
|
---|
528 | }
|
---|
529 | }
|
---|
530 |
|
---|
531 | static void
|
---|
532 | set_local_option(struct connectdata *conn, int option, int newstate)
|
---|
533 | {
|
---|
534 | struct TELNET *tn = (struct TELNET *)conn->data->req.protop;
|
---|
535 | if(newstate == CURL_YES) {
|
---|
536 | switch(tn->us[option]) {
|
---|
537 | case CURL_NO:
|
---|
538 | tn->us[option] = CURL_WANTYES;
|
---|
539 | send_negotiation(conn, CURL_WILL, option);
|
---|
540 | break;
|
---|
541 |
|
---|
542 | case CURL_YES:
|
---|
543 | /* Already enabled */
|
---|
544 | break;
|
---|
545 |
|
---|
546 | case CURL_WANTNO:
|
---|
547 | switch(tn->usq[option]) {
|
---|
548 | case CURL_EMPTY:
|
---|
549 | /* Already negotiating for CURL_YES, queue the request */
|
---|
550 | tn->usq[option] = CURL_OPPOSITE;
|
---|
551 | break;
|
---|
552 | case CURL_OPPOSITE:
|
---|
553 | /* Error: already queued an enable request */
|
---|
554 | break;
|
---|
555 | }
|
---|
556 | break;
|
---|
557 |
|
---|
558 | case CURL_WANTYES:
|
---|
559 | switch(tn->usq[option]) {
|
---|
560 | case CURL_EMPTY:
|
---|
561 | /* Error: already negotiating for enable */
|
---|
562 | break;
|
---|
563 | case CURL_OPPOSITE:
|
---|
564 | tn->usq[option] = CURL_EMPTY;
|
---|
565 | break;
|
---|
566 | }
|
---|
567 | break;
|
---|
568 | }
|
---|
569 | }
|
---|
570 | else { /* NO */
|
---|
571 | switch(tn->us[option]) {
|
---|
572 | case CURL_NO:
|
---|
573 | /* Already disabled */
|
---|
574 | break;
|
---|
575 |
|
---|
576 | case CURL_YES:
|
---|
577 | tn->us[option] = CURL_WANTNO;
|
---|
578 | send_negotiation(conn, CURL_WONT, option);
|
---|
579 | break;
|
---|
580 |
|
---|
581 | case CURL_WANTNO:
|
---|
582 | switch(tn->usq[option]) {
|
---|
583 | case CURL_EMPTY:
|
---|
584 | /* Already negotiating for NO */
|
---|
585 | break;
|
---|
586 | case CURL_OPPOSITE:
|
---|
587 | tn->usq[option] = CURL_EMPTY;
|
---|
588 | break;
|
---|
589 | }
|
---|
590 | break;
|
---|
591 |
|
---|
592 | case CURL_WANTYES:
|
---|
593 | switch(tn->usq[option]) {
|
---|
594 | case CURL_EMPTY:
|
---|
595 | tn->usq[option] = CURL_OPPOSITE;
|
---|
596 | break;
|
---|
597 | case CURL_OPPOSITE:
|
---|
598 | break;
|
---|
599 | }
|
---|
600 | break;
|
---|
601 | }
|
---|
602 | }
|
---|
603 | }
|
---|
604 |
|
---|
605 | static
|
---|
606 | void rec_do(struct connectdata *conn, int option)
|
---|
607 | {
|
---|
608 | struct TELNET *tn = (struct TELNET *)conn->data->req.protop;
|
---|
609 | switch(tn->us[option]) {
|
---|
610 | case CURL_NO:
|
---|
611 | if(tn->us_preferred[option] == CURL_YES) {
|
---|
612 | tn->us[option] = CURL_YES;
|
---|
613 | send_negotiation(conn, CURL_WILL, option);
|
---|
614 | if(tn->subnegotiation[option] == CURL_YES)
|
---|
615 | /* transmission of data option */
|
---|
616 | sendsuboption(conn, option);
|
---|
617 | }
|
---|
618 | else if(tn->subnegotiation[option] == CURL_YES) {
|
---|
619 | /* send information to achieve this option*/
|
---|
620 | tn->us[option] = CURL_YES;
|
---|
621 | send_negotiation(conn, CURL_WILL, option);
|
---|
622 | sendsuboption(conn, option);
|
---|
623 | }
|
---|
624 | else
|
---|
625 | send_negotiation(conn, CURL_WONT, option);
|
---|
626 | break;
|
---|
627 |
|
---|
628 | case CURL_YES:
|
---|
629 | /* Already enabled */
|
---|
630 | break;
|
---|
631 |
|
---|
632 | case CURL_WANTNO:
|
---|
633 | switch(tn->usq[option]) {
|
---|
634 | case CURL_EMPTY:
|
---|
635 | /* Error: DONT answered by WILL */
|
---|
636 | tn->us[option] = CURL_NO;
|
---|
637 | break;
|
---|
638 | case CURL_OPPOSITE:
|
---|
639 | /* Error: DONT answered by WILL */
|
---|
640 | tn->us[option] = CURL_YES;
|
---|
641 | tn->usq[option] = CURL_EMPTY;
|
---|
642 | break;
|
---|
643 | }
|
---|
644 | break;
|
---|
645 |
|
---|
646 | case CURL_WANTYES:
|
---|
647 | switch(tn->usq[option]) {
|
---|
648 | case CURL_EMPTY:
|
---|
649 | tn->us[option] = CURL_YES;
|
---|
650 | if(tn->subnegotiation[option] == CURL_YES) {
|
---|
651 | /* transmission of data option */
|
---|
652 | sendsuboption(conn, option);
|
---|
653 | }
|
---|
654 | break;
|
---|
655 | case CURL_OPPOSITE:
|
---|
656 | tn->us[option] = CURL_WANTNO;
|
---|
657 | tn->himq[option] = CURL_EMPTY;
|
---|
658 | send_negotiation(conn, CURL_WONT, option);
|
---|
659 | break;
|
---|
660 | }
|
---|
661 | break;
|
---|
662 | }
|
---|
663 | }
|
---|
664 |
|
---|
665 | static
|
---|
666 | void rec_dont(struct connectdata *conn, int option)
|
---|
667 | {
|
---|
668 | struct TELNET *tn = (struct TELNET *)conn->data->req.protop;
|
---|
669 | switch(tn->us[option]) {
|
---|
670 | case CURL_NO:
|
---|
671 | /* Already disabled */
|
---|
672 | break;
|
---|
673 |
|
---|
674 | case CURL_YES:
|
---|
675 | tn->us[option] = CURL_NO;
|
---|
676 | send_negotiation(conn, CURL_WONT, option);
|
---|
677 | break;
|
---|
678 |
|
---|
679 | case CURL_WANTNO:
|
---|
680 | switch(tn->usq[option]) {
|
---|
681 | case CURL_EMPTY:
|
---|
682 | tn->us[option] = CURL_NO;
|
---|
683 | break;
|
---|
684 |
|
---|
685 | case CURL_OPPOSITE:
|
---|
686 | tn->us[option] = CURL_WANTYES;
|
---|
687 | tn->usq[option] = CURL_EMPTY;
|
---|
688 | send_negotiation(conn, CURL_WILL, option);
|
---|
689 | break;
|
---|
690 | }
|
---|
691 | break;
|
---|
692 |
|
---|
693 | case CURL_WANTYES:
|
---|
694 | switch(tn->usq[option]) {
|
---|
695 | case CURL_EMPTY:
|
---|
696 | tn->us[option] = CURL_NO;
|
---|
697 | break;
|
---|
698 | case CURL_OPPOSITE:
|
---|
699 | tn->us[option] = CURL_NO;
|
---|
700 | tn->usq[option] = CURL_EMPTY;
|
---|
701 | break;
|
---|
702 | }
|
---|
703 | break;
|
---|
704 | }
|
---|
705 | }
|
---|
706 |
|
---|
707 |
|
---|
708 | static void printsub(struct Curl_easy *data,
|
---|
709 | int direction, /* '<' or '>' */
|
---|
710 | unsigned char *pointer, /* where suboption data is */
|
---|
711 | size_t length) /* length of suboption data */
|
---|
712 | {
|
---|
713 | unsigned int i = 0;
|
---|
714 |
|
---|
715 | if(data->set.verbose) {
|
---|
716 | if(direction) {
|
---|
717 | infof(data, "%s IAC SB ", (direction == '<')? "RCVD":"SENT");
|
---|
718 | if(length >= 3) {
|
---|
719 | int j;
|
---|
720 |
|
---|
721 | i = pointer[length-2];
|
---|
722 | j = pointer[length-1];
|
---|
723 |
|
---|
724 | if(i != CURL_IAC || j != CURL_SE) {
|
---|
725 | infof(data, "(terminated by ");
|
---|
726 | if(CURL_TELOPT_OK(i))
|
---|
727 | infof(data, "%s ", CURL_TELOPT(i));
|
---|
728 | else if(CURL_TELCMD_OK(i))
|
---|
729 | infof(data, "%s ", CURL_TELCMD(i));
|
---|
730 | else
|
---|
731 | infof(data, "%u ", i);
|
---|
732 | if(CURL_TELOPT_OK(j))
|
---|
733 | infof(data, "%s", CURL_TELOPT(j));
|
---|
734 | else if(CURL_TELCMD_OK(j))
|
---|
735 | infof(data, "%s", CURL_TELCMD(j));
|
---|
736 | else
|
---|
737 | infof(data, "%d", j);
|
---|
738 | infof(data, ", not IAC SE!) ");
|
---|
739 | }
|
---|
740 | }
|
---|
741 | length -= 2;
|
---|
742 | }
|
---|
743 | if(length < 1) {
|
---|
744 | infof(data, "(Empty suboption?)");
|
---|
745 | return;
|
---|
746 | }
|
---|
747 |
|
---|
748 | if(CURL_TELOPT_OK(pointer[0])) {
|
---|
749 | switch(pointer[0]) {
|
---|
750 | case CURL_TELOPT_TTYPE:
|
---|
751 | case CURL_TELOPT_XDISPLOC:
|
---|
752 | case CURL_TELOPT_NEW_ENVIRON:
|
---|
753 | case CURL_TELOPT_NAWS:
|
---|
754 | infof(data, "%s", CURL_TELOPT(pointer[0]));
|
---|
755 | break;
|
---|
756 | default:
|
---|
757 | infof(data, "%s (unsupported)", CURL_TELOPT(pointer[0]));
|
---|
758 | break;
|
---|
759 | }
|
---|
760 | }
|
---|
761 | else
|
---|
762 | infof(data, "%d (unknown)", pointer[i]);
|
---|
763 |
|
---|
764 | switch(pointer[0]) {
|
---|
765 | case CURL_TELOPT_NAWS:
|
---|
766 | if(length > 4)
|
---|
767 | infof(data, "Width: %hu ; Height: %hu", (pointer[1]<<8) | pointer[2],
|
---|
768 | (pointer[3]<<8) | pointer[4]);
|
---|
769 | break;
|
---|
770 | default:
|
---|
771 | switch(pointer[1]) {
|
---|
772 | case CURL_TELQUAL_IS:
|
---|
773 | infof(data, " IS");
|
---|
774 | break;
|
---|
775 | case CURL_TELQUAL_SEND:
|
---|
776 | infof(data, " SEND");
|
---|
777 | break;
|
---|
778 | case CURL_TELQUAL_INFO:
|
---|
779 | infof(data, " INFO/REPLY");
|
---|
780 | break;
|
---|
781 | case CURL_TELQUAL_NAME:
|
---|
782 | infof(data, " NAME");
|
---|
783 | break;
|
---|
784 | }
|
---|
785 |
|
---|
786 | switch(pointer[0]) {
|
---|
787 | case CURL_TELOPT_TTYPE:
|
---|
788 | case CURL_TELOPT_XDISPLOC:
|
---|
789 | pointer[length] = 0;
|
---|
790 | infof(data, " \"%s\"", &pointer[2]);
|
---|
791 | break;
|
---|
792 | case CURL_TELOPT_NEW_ENVIRON:
|
---|
793 | if(pointer[1] == CURL_TELQUAL_IS) {
|
---|
794 | infof(data, " ");
|
---|
795 | for(i = 3; i < length; i++) {
|
---|
796 | switch(pointer[i]) {
|
---|
797 | case CURL_NEW_ENV_VAR:
|
---|
798 | infof(data, ", ");
|
---|
799 | break;
|
---|
800 | case CURL_NEW_ENV_VALUE:
|
---|
801 | infof(data, " = ");
|
---|
802 | break;
|
---|
803 | default:
|
---|
804 | infof(data, "%c", pointer[i]);
|
---|
805 | break;
|
---|
806 | }
|
---|
807 | }
|
---|
808 | }
|
---|
809 | break;
|
---|
810 | default:
|
---|
811 | for(i = 2; i < length; i++)
|
---|
812 | infof(data, " %.2x", pointer[i]);
|
---|
813 | break;
|
---|
814 | }
|
---|
815 | }
|
---|
816 | if(direction)
|
---|
817 | infof(data, "\n");
|
---|
818 | }
|
---|
819 | }
|
---|
820 |
|
---|
821 | static CURLcode check_telnet_options(struct connectdata *conn)
|
---|
822 | {
|
---|
823 | struct curl_slist *head;
|
---|
824 | struct curl_slist *beg;
|
---|
825 | char option_keyword[128] = "";
|
---|
826 | char option_arg[256] = "";
|
---|
827 | struct Curl_easy *data = conn->data;
|
---|
828 | struct TELNET *tn = (struct TELNET *)conn->data->req.protop;
|
---|
829 | CURLcode result = CURLE_OK;
|
---|
830 | int binary_option;
|
---|
831 |
|
---|
832 | /* Add the user name as an environment variable if it
|
---|
833 | was given on the command line */
|
---|
834 | if(conn->bits.user_passwd) {
|
---|
835 | snprintf(option_arg, sizeof(option_arg), "USER,%s", conn->user);
|
---|
836 | beg = curl_slist_append(tn->telnet_vars, option_arg);
|
---|
837 | if(!beg) {
|
---|
838 | curl_slist_free_all(tn->telnet_vars);
|
---|
839 | tn->telnet_vars = NULL;
|
---|
840 | return CURLE_OUT_OF_MEMORY;
|
---|
841 | }
|
---|
842 | tn->telnet_vars = beg;
|
---|
843 | tn->us_preferred[CURL_TELOPT_NEW_ENVIRON] = CURL_YES;
|
---|
844 | }
|
---|
845 |
|
---|
846 | for(head = data->set.telnet_options; head; head = head->next) {
|
---|
847 | if(sscanf(head->data, "%127[^= ]%*[ =]%255s",
|
---|
848 | option_keyword, option_arg) == 2) {
|
---|
849 |
|
---|
850 | /* Terminal type */
|
---|
851 | if(strcasecompare(option_keyword, "TTYPE")) {
|
---|
852 | strncpy(tn->subopt_ttype, option_arg, 31);
|
---|
853 | tn->subopt_ttype[31] = 0; /* String termination */
|
---|
854 | tn->us_preferred[CURL_TELOPT_TTYPE] = CURL_YES;
|
---|
855 | continue;
|
---|
856 | }
|
---|
857 |
|
---|
858 | /* Display variable */
|
---|
859 | if(strcasecompare(option_keyword, "XDISPLOC")) {
|
---|
860 | strncpy(tn->subopt_xdisploc, option_arg, 127);
|
---|
861 | tn->subopt_xdisploc[127] = 0; /* String termination */
|
---|
862 | tn->us_preferred[CURL_TELOPT_XDISPLOC] = CURL_YES;
|
---|
863 | continue;
|
---|
864 | }
|
---|
865 |
|
---|
866 | /* Environment variable */
|
---|
867 | if(strcasecompare(option_keyword, "NEW_ENV")) {
|
---|
868 | beg = curl_slist_append(tn->telnet_vars, option_arg);
|
---|
869 | if(!beg) {
|
---|
870 | result = CURLE_OUT_OF_MEMORY;
|
---|
871 | break;
|
---|
872 | }
|
---|
873 | tn->telnet_vars = beg;
|
---|
874 | tn->us_preferred[CURL_TELOPT_NEW_ENVIRON] = CURL_YES;
|
---|
875 | continue;
|
---|
876 | }
|
---|
877 |
|
---|
878 | /* Window Size */
|
---|
879 | if(strcasecompare(option_keyword, "WS")) {
|
---|
880 | if(sscanf(option_arg, "%hu%*[xX]%hu",
|
---|
881 | &tn->subopt_wsx, &tn->subopt_wsy) == 2)
|
---|
882 | tn->us_preferred[CURL_TELOPT_NAWS] = CURL_YES;
|
---|
883 | else {
|
---|
884 | failf(data, "Syntax error in telnet option: %s", head->data);
|
---|
885 | result = CURLE_TELNET_OPTION_SYNTAX;
|
---|
886 | break;
|
---|
887 | }
|
---|
888 | continue;
|
---|
889 | }
|
---|
890 |
|
---|
891 | /* To take care or not of the 8th bit in data exchange */
|
---|
892 | if(strcasecompare(option_keyword, "BINARY")) {
|
---|
893 | binary_option = atoi(option_arg);
|
---|
894 | if(binary_option != 1) {
|
---|
895 | tn->us_preferred[CURL_TELOPT_BINARY] = CURL_NO;
|
---|
896 | tn->him_preferred[CURL_TELOPT_BINARY] = CURL_NO;
|
---|
897 | }
|
---|
898 | continue;
|
---|
899 | }
|
---|
900 |
|
---|
901 | failf(data, "Unknown telnet option %s", head->data);
|
---|
902 | result = CURLE_UNKNOWN_OPTION;
|
---|
903 | break;
|
---|
904 | }
|
---|
905 | failf(data, "Syntax error in telnet option: %s", head->data);
|
---|
906 | result = CURLE_TELNET_OPTION_SYNTAX;
|
---|
907 | break;
|
---|
908 | }
|
---|
909 |
|
---|
910 | if(result) {
|
---|
911 | curl_slist_free_all(tn->telnet_vars);
|
---|
912 | tn->telnet_vars = NULL;
|
---|
913 | }
|
---|
914 |
|
---|
915 | return result;
|
---|
916 | }
|
---|
917 |
|
---|
918 | /*
|
---|
919 | * suboption()
|
---|
920 | *
|
---|
921 | * Look at the sub-option buffer, and try to be helpful to the other
|
---|
922 | * side.
|
---|
923 | */
|
---|
924 |
|
---|
925 | static void suboption(struct connectdata *conn)
|
---|
926 | {
|
---|
927 | struct curl_slist *v;
|
---|
928 | unsigned char temp[2048];
|
---|
929 | ssize_t bytes_written;
|
---|
930 | size_t len;
|
---|
931 | size_t tmplen;
|
---|
932 | int err;
|
---|
933 | char varname[128] = "";
|
---|
934 | char varval[128] = "";
|
---|
935 | struct Curl_easy *data = conn->data;
|
---|
936 | struct TELNET *tn = (struct TELNET *)data->req.protop;
|
---|
937 |
|
---|
938 | printsub(data, '<', (unsigned char *)tn->subbuffer, CURL_SB_LEN(tn) + 2);
|
---|
939 | switch(CURL_SB_GET(tn)) {
|
---|
940 | case CURL_TELOPT_TTYPE:
|
---|
941 | len = strlen(tn->subopt_ttype) + 4 + 2;
|
---|
942 | snprintf((char *)temp, sizeof(temp),
|
---|
943 | "%c%c%c%c%s%c%c", CURL_IAC, CURL_SB, CURL_TELOPT_TTYPE,
|
---|
944 | CURL_TELQUAL_IS, tn->subopt_ttype, CURL_IAC, CURL_SE);
|
---|
945 | bytes_written = swrite(conn->sock[FIRSTSOCKET], temp, len);
|
---|
946 | if(bytes_written < 0) {
|
---|
947 | err = SOCKERRNO;
|
---|
948 | failf(data,"Sending data failed (%d)",err);
|
---|
949 | }
|
---|
950 | printsub(data, '>', &temp[2], len-2);
|
---|
951 | break;
|
---|
952 | case CURL_TELOPT_XDISPLOC:
|
---|
953 | len = strlen(tn->subopt_xdisploc) + 4 + 2;
|
---|
954 | snprintf((char *)temp, sizeof(temp),
|
---|
955 | "%c%c%c%c%s%c%c", CURL_IAC, CURL_SB, CURL_TELOPT_XDISPLOC,
|
---|
956 | CURL_TELQUAL_IS, tn->subopt_xdisploc, CURL_IAC, CURL_SE);
|
---|
957 | bytes_written = swrite(conn->sock[FIRSTSOCKET], temp, len);
|
---|
958 | if(bytes_written < 0) {
|
---|
959 | err = SOCKERRNO;
|
---|
960 | failf(data,"Sending data failed (%d)",err);
|
---|
961 | }
|
---|
962 | printsub(data, '>', &temp[2], len-2);
|
---|
963 | break;
|
---|
964 | case CURL_TELOPT_NEW_ENVIRON:
|
---|
965 | snprintf((char *)temp, sizeof(temp),
|
---|
966 | "%c%c%c%c", CURL_IAC, CURL_SB, CURL_TELOPT_NEW_ENVIRON,
|
---|
967 | CURL_TELQUAL_IS);
|
---|
968 | len = 4;
|
---|
969 |
|
---|
970 | for(v = tn->telnet_vars; v; v = v->next) {
|
---|
971 | tmplen = (strlen(v->data) + 1);
|
---|
972 | /* Add the variable only if it fits */
|
---|
973 | if(len + tmplen < (int)sizeof(temp)-6) {
|
---|
974 | if(sscanf(v->data, "%127[^,],%127s", varname, varval)) {
|
---|
975 | snprintf((char *)&temp[len], sizeof(temp) - len,
|
---|
976 | "%c%s%c%s", CURL_NEW_ENV_VAR, varname,
|
---|
977 | CURL_NEW_ENV_VALUE, varval);
|
---|
978 | len += tmplen;
|
---|
979 | }
|
---|
980 | }
|
---|
981 | }
|
---|
982 | snprintf((char *)&temp[len], sizeof(temp) - len,
|
---|
983 | "%c%c", CURL_IAC, CURL_SE);
|
---|
984 | len += 2;
|
---|
985 | bytes_written = swrite(conn->sock[FIRSTSOCKET], temp, len);
|
---|
986 | if(bytes_written < 0) {
|
---|
987 | err = SOCKERRNO;
|
---|
988 | failf(data,"Sending data failed (%d)",err);
|
---|
989 | }
|
---|
990 | printsub(data, '>', &temp[2], len-2);
|
---|
991 | break;
|
---|
992 | }
|
---|
993 | return;
|
---|
994 | }
|
---|
995 |
|
---|
996 |
|
---|
997 | /*
|
---|
998 | * sendsuboption()
|
---|
999 | *
|
---|
1000 | * Send suboption information to the server side.
|
---|
1001 | */
|
---|
1002 |
|
---|
1003 | static void sendsuboption(struct connectdata *conn, int option)
|
---|
1004 | {
|
---|
1005 | ssize_t bytes_written;
|
---|
1006 | int err;
|
---|
1007 | unsigned short x, y;
|
---|
1008 | unsigned char *uc1, *uc2;
|
---|
1009 |
|
---|
1010 | struct Curl_easy *data = conn->data;
|
---|
1011 | struct TELNET *tn = (struct TELNET *)data->req.protop;
|
---|
1012 |
|
---|
1013 | switch(option) {
|
---|
1014 | case CURL_TELOPT_NAWS:
|
---|
1015 | /* We prepare data to be sent */
|
---|
1016 | CURL_SB_CLEAR(tn);
|
---|
1017 | CURL_SB_ACCUM(tn, CURL_IAC);
|
---|
1018 | CURL_SB_ACCUM(tn, CURL_SB);
|
---|
1019 | CURL_SB_ACCUM(tn, CURL_TELOPT_NAWS);
|
---|
1020 | /* We must deal either with litte or big endian processors */
|
---|
1021 | /* Window size must be sent according to the 'network order' */
|
---|
1022 | x = htons(tn->subopt_wsx);
|
---|
1023 | y = htons(tn->subopt_wsy);
|
---|
1024 | uc1 = (unsigned char *)&x;
|
---|
1025 | uc2 = (unsigned char *)&y;
|
---|
1026 | CURL_SB_ACCUM(tn, uc1[0]);
|
---|
1027 | CURL_SB_ACCUM(tn, uc1[1]);
|
---|
1028 | CURL_SB_ACCUM(tn, uc2[0]);
|
---|
1029 | CURL_SB_ACCUM(tn, uc2[1]);
|
---|
1030 |
|
---|
1031 | CURL_SB_ACCUM(tn, CURL_IAC);
|
---|
1032 | CURL_SB_ACCUM(tn, CURL_SE);
|
---|
1033 | CURL_SB_TERM(tn);
|
---|
1034 | /* data suboption is now ready */
|
---|
1035 |
|
---|
1036 | printsub(data, '>', (unsigned char *)tn->subbuffer + 2,
|
---|
1037 | CURL_SB_LEN(tn)-2);
|
---|
1038 |
|
---|
1039 | /* we send the header of the suboption... */
|
---|
1040 | bytes_written = swrite(conn->sock[FIRSTSOCKET], tn->subbuffer, 3);
|
---|
1041 | if(bytes_written < 0) {
|
---|
1042 | err = SOCKERRNO;
|
---|
1043 | failf(data, "Sending data failed (%d)", err);
|
---|
1044 | }
|
---|
1045 | /* ... then the window size with the send_telnet_data() function
|
---|
1046 | to deal with 0xFF cases ... */
|
---|
1047 | send_telnet_data(conn, (char *)tn->subbuffer + 3, 4);
|
---|
1048 | /* ... and the footer */
|
---|
1049 | bytes_written = swrite(conn->sock[FIRSTSOCKET], tn->subbuffer + 7, 2);
|
---|
1050 | if(bytes_written < 0) {
|
---|
1051 | err = SOCKERRNO;
|
---|
1052 | failf(data, "Sending data failed (%d)", err);
|
---|
1053 | }
|
---|
1054 | break;
|
---|
1055 | }
|
---|
1056 | }
|
---|
1057 |
|
---|
1058 |
|
---|
1059 | static
|
---|
1060 | CURLcode telrcv(struct connectdata *conn,
|
---|
1061 | const unsigned char *inbuf, /* Data received from socket */
|
---|
1062 | ssize_t count) /* Number of bytes received */
|
---|
1063 | {
|
---|
1064 | unsigned char c;
|
---|
1065 | CURLcode result;
|
---|
1066 | int in = 0;
|
---|
1067 | int startwrite = -1;
|
---|
1068 | struct Curl_easy *data = conn->data;
|
---|
1069 | struct TELNET *tn = (struct TELNET *)data->req.protop;
|
---|
1070 |
|
---|
1071 | #define startskipping() \
|
---|
1072 | if(startwrite >= 0) { \
|
---|
1073 | result = Curl_client_write(conn, \
|
---|
1074 | CLIENTWRITE_BODY, \
|
---|
1075 | (char *)&inbuf[startwrite], \
|
---|
1076 | in-startwrite); \
|
---|
1077 | if(result) \
|
---|
1078 | return result; \
|
---|
1079 | } \
|
---|
1080 | startwrite = -1
|
---|
1081 |
|
---|
1082 | #define writebyte() \
|
---|
1083 | if(startwrite < 0) \
|
---|
1084 | startwrite = in
|
---|
1085 |
|
---|
1086 | #define bufferflush() startskipping()
|
---|
1087 |
|
---|
1088 | while(count--) {
|
---|
1089 | c = inbuf[in];
|
---|
1090 |
|
---|
1091 | switch(tn->telrcv_state) {
|
---|
1092 | case CURL_TS_CR:
|
---|
1093 | tn->telrcv_state = CURL_TS_DATA;
|
---|
1094 | if(c == '\0') {
|
---|
1095 | startskipping();
|
---|
1096 | break; /* Ignore \0 after CR */
|
---|
1097 | }
|
---|
1098 | writebyte();
|
---|
1099 | break;
|
---|
1100 |
|
---|
1101 | case CURL_TS_DATA:
|
---|
1102 | if(c == CURL_IAC) {
|
---|
1103 | tn->telrcv_state = CURL_TS_IAC;
|
---|
1104 | startskipping();
|
---|
1105 | break;
|
---|
1106 | }
|
---|
1107 | else if(c == '\r')
|
---|
1108 | tn->telrcv_state = CURL_TS_CR;
|
---|
1109 | writebyte();
|
---|
1110 | break;
|
---|
1111 |
|
---|
1112 | case CURL_TS_IAC:
|
---|
1113 | process_iac:
|
---|
1114 | DEBUGASSERT(startwrite < 0);
|
---|
1115 | switch(c) {
|
---|
1116 | case CURL_WILL:
|
---|
1117 | tn->telrcv_state = CURL_TS_WILL;
|
---|
1118 | break;
|
---|
1119 | case CURL_WONT:
|
---|
1120 | tn->telrcv_state = CURL_TS_WONT;
|
---|
1121 | break;
|
---|
1122 | case CURL_DO:
|
---|
1123 | tn->telrcv_state = CURL_TS_DO;
|
---|
1124 | break;
|
---|
1125 | case CURL_DONT:
|
---|
1126 | tn->telrcv_state = CURL_TS_DONT;
|
---|
1127 | break;
|
---|
1128 | case CURL_SB:
|
---|
1129 | CURL_SB_CLEAR(tn);
|
---|
1130 | tn->telrcv_state = CURL_TS_SB;
|
---|
1131 | break;
|
---|
1132 | case CURL_IAC:
|
---|
1133 | tn->telrcv_state = CURL_TS_DATA;
|
---|
1134 | writebyte();
|
---|
1135 | break;
|
---|
1136 | case CURL_DM:
|
---|
1137 | case CURL_NOP:
|
---|
1138 | case CURL_GA:
|
---|
1139 | default:
|
---|
1140 | tn->telrcv_state = CURL_TS_DATA;
|
---|
1141 | printoption(data, "RCVD", CURL_IAC, c);
|
---|
1142 | break;
|
---|
1143 | }
|
---|
1144 | break;
|
---|
1145 |
|
---|
1146 | case CURL_TS_WILL:
|
---|
1147 | printoption(data, "RCVD", CURL_WILL, c);
|
---|
1148 | tn->please_negotiate = 1;
|
---|
1149 | rec_will(conn, c);
|
---|
1150 | tn->telrcv_state = CURL_TS_DATA;
|
---|
1151 | break;
|
---|
1152 |
|
---|
1153 | case CURL_TS_WONT:
|
---|
1154 | printoption(data, "RCVD", CURL_WONT, c);
|
---|
1155 | tn->please_negotiate = 1;
|
---|
1156 | rec_wont(conn, c);
|
---|
1157 | tn->telrcv_state = CURL_TS_DATA;
|
---|
1158 | break;
|
---|
1159 |
|
---|
1160 | case CURL_TS_DO:
|
---|
1161 | printoption(data, "RCVD", CURL_DO, c);
|
---|
1162 | tn->please_negotiate = 1;
|
---|
1163 | rec_do(conn, c);
|
---|
1164 | tn->telrcv_state = CURL_TS_DATA;
|
---|
1165 | break;
|
---|
1166 |
|
---|
1167 | case CURL_TS_DONT:
|
---|
1168 | printoption(data, "RCVD", CURL_DONT, c);
|
---|
1169 | tn->please_negotiate = 1;
|
---|
1170 | rec_dont(conn, c);
|
---|
1171 | tn->telrcv_state = CURL_TS_DATA;
|
---|
1172 | break;
|
---|
1173 |
|
---|
1174 | case CURL_TS_SB:
|
---|
1175 | if(c == CURL_IAC)
|
---|
1176 | tn->telrcv_state = CURL_TS_SE;
|
---|
1177 | else
|
---|
1178 | CURL_SB_ACCUM(tn, c);
|
---|
1179 | break;
|
---|
1180 |
|
---|
1181 | case CURL_TS_SE:
|
---|
1182 | if(c != CURL_SE) {
|
---|
1183 | if(c != CURL_IAC) {
|
---|
1184 | /*
|
---|
1185 | * This is an error. We only expect to get "IAC IAC" or "IAC SE".
|
---|
1186 | * Several things may have happened. An IAC was not doubled, the
|
---|
1187 | * IAC SE was left off, or another option got inserted into the
|
---|
1188 | * suboption are all possibilities. If we assume that the IAC was
|
---|
1189 | * not doubled, and really the IAC SE was left off, we could get
|
---|
1190 | * into an infinite loop here. So, instead, we terminate the
|
---|
1191 | * suboption, and process the partial suboption if we can.
|
---|
1192 | */
|
---|
1193 | CURL_SB_ACCUM(tn, CURL_IAC);
|
---|
1194 | CURL_SB_ACCUM(tn, c);
|
---|
1195 | tn->subpointer -= 2;
|
---|
1196 | CURL_SB_TERM(tn);
|
---|
1197 |
|
---|
1198 | printoption(data, "In SUBOPTION processing, RCVD", CURL_IAC, c);
|
---|
1199 | suboption(conn); /* handle sub-option */
|
---|
1200 | tn->telrcv_state = CURL_TS_IAC;
|
---|
1201 | goto process_iac;
|
---|
1202 | }
|
---|
1203 | CURL_SB_ACCUM(tn, c);
|
---|
1204 | tn->telrcv_state = CURL_TS_SB;
|
---|
1205 | }
|
---|
1206 | else
|
---|
1207 | {
|
---|
1208 | CURL_SB_ACCUM(tn, CURL_IAC);
|
---|
1209 | CURL_SB_ACCUM(tn, CURL_SE);
|
---|
1210 | tn->subpointer -= 2;
|
---|
1211 | CURL_SB_TERM(tn);
|
---|
1212 | suboption(conn); /* handle sub-option */
|
---|
1213 | tn->telrcv_state = CURL_TS_DATA;
|
---|
1214 | }
|
---|
1215 | break;
|
---|
1216 | }
|
---|
1217 | ++in;
|
---|
1218 | }
|
---|
1219 | bufferflush();
|
---|
1220 | return CURLE_OK;
|
---|
1221 | }
|
---|
1222 |
|
---|
1223 | /* Escape and send a telnet data block */
|
---|
1224 | static CURLcode send_telnet_data(struct connectdata *conn,
|
---|
1225 | char *buffer, ssize_t nread)
|
---|
1226 | {
|
---|
1227 | ssize_t escapes, i, j, outlen;
|
---|
1228 | unsigned char *outbuf = NULL;
|
---|
1229 | CURLcode result = CURLE_OK;
|
---|
1230 | ssize_t bytes_written, total_written;
|
---|
1231 |
|
---|
1232 | /* Determine size of new buffer after escaping */
|
---|
1233 | escapes = 0;
|
---|
1234 | for(i = 0; i < nread; i++)
|
---|
1235 | if((unsigned char)buffer[i] == CURL_IAC)
|
---|
1236 | escapes++;
|
---|
1237 | outlen = nread + escapes;
|
---|
1238 |
|
---|
1239 | if(outlen == nread)
|
---|
1240 | outbuf = (unsigned char *)buffer;
|
---|
1241 | else {
|
---|
1242 | outbuf = malloc(nread + escapes + 1);
|
---|
1243 | if(!outbuf)
|
---|
1244 | return CURLE_OUT_OF_MEMORY;
|
---|
1245 |
|
---|
1246 | j = 0;
|
---|
1247 | for(i = 0; i < nread; i++) {
|
---|
1248 | outbuf[j++] = buffer[i];
|
---|
1249 | if((unsigned char)buffer[i] == CURL_IAC)
|
---|
1250 | outbuf[j++] = CURL_IAC;
|
---|
1251 | }
|
---|
1252 | outbuf[j] = '\0';
|
---|
1253 | }
|
---|
1254 |
|
---|
1255 | total_written = 0;
|
---|
1256 | while(!result && total_written < outlen) {
|
---|
1257 | /* Make sure socket is writable to avoid EWOULDBLOCK condition */
|
---|
1258 | struct pollfd pfd[1];
|
---|
1259 | pfd[0].fd = conn->sock[FIRSTSOCKET];
|
---|
1260 | pfd[0].events = POLLOUT;
|
---|
1261 | switch(Curl_poll(pfd, 1, -1)) {
|
---|
1262 | case -1: /* error, abort writing */
|
---|
1263 | case 0: /* timeout (will never happen) */
|
---|
1264 | result = CURLE_SEND_ERROR;
|
---|
1265 | break;
|
---|
1266 | default: /* write! */
|
---|
1267 | bytes_written = 0;
|
---|
1268 | result = Curl_write(conn, conn->sock[FIRSTSOCKET],
|
---|
1269 | outbuf + total_written,
|
---|
1270 | outlen - total_written,
|
---|
1271 | &bytes_written);
|
---|
1272 | total_written += bytes_written;
|
---|
1273 | break;
|
---|
1274 | }
|
---|
1275 | }
|
---|
1276 |
|
---|
1277 | /* Free malloc copy if escaped */
|
---|
1278 | if(outbuf != (unsigned char *)buffer)
|
---|
1279 | free(outbuf);
|
---|
1280 |
|
---|
1281 | return result;
|
---|
1282 | }
|
---|
1283 |
|
---|
1284 | static CURLcode telnet_done(struct connectdata *conn,
|
---|
1285 | CURLcode status, bool premature)
|
---|
1286 | {
|
---|
1287 | struct TELNET *tn = (struct TELNET *)conn->data->req.protop;
|
---|
1288 | (void)status; /* unused */
|
---|
1289 | (void)premature; /* not used */
|
---|
1290 |
|
---|
1291 | if(!tn)
|
---|
1292 | return CURLE_OK;
|
---|
1293 |
|
---|
1294 | curl_slist_free_all(tn->telnet_vars);
|
---|
1295 | tn->telnet_vars = NULL;
|
---|
1296 |
|
---|
1297 | Curl_safefree(conn->data->req.protop);
|
---|
1298 |
|
---|
1299 | return CURLE_OK;
|
---|
1300 | }
|
---|
1301 |
|
---|
1302 | static CURLcode telnet_do(struct connectdata *conn, bool *done)
|
---|
1303 | {
|
---|
1304 | CURLcode result;
|
---|
1305 | struct Curl_easy *data = conn->data;
|
---|
1306 | curl_socket_t sockfd = conn->sock[FIRSTSOCKET];
|
---|
1307 | #ifdef USE_WINSOCK
|
---|
1308 | HMODULE wsock2;
|
---|
1309 | WSOCK2_FUNC close_event_func;
|
---|
1310 | WSOCK2_FUNC create_event_func;
|
---|
1311 | WSOCK2_FUNC event_select_func;
|
---|
1312 | WSOCK2_FUNC enum_netevents_func;
|
---|
1313 | WSAEVENT event_handle;
|
---|
1314 | WSANETWORKEVENTS events;
|
---|
1315 | HANDLE stdin_handle;
|
---|
1316 | HANDLE objs[2];
|
---|
1317 | DWORD obj_count;
|
---|
1318 | DWORD wait_timeout;
|
---|
1319 | DWORD waitret;
|
---|
1320 | DWORD readfile_read;
|
---|
1321 | int err;
|
---|
1322 | #else
|
---|
1323 | int interval_ms;
|
---|
1324 | struct pollfd pfd[2];
|
---|
1325 | int poll_cnt;
|
---|
1326 | curl_off_t total_dl = 0;
|
---|
1327 | curl_off_t total_ul = 0;
|
---|
1328 | #endif
|
---|
1329 | ssize_t nread;
|
---|
1330 | struct curltime now;
|
---|
1331 | bool keepon = TRUE;
|
---|
1332 | char *buf = data->state.buffer;
|
---|
1333 | struct TELNET *tn;
|
---|
1334 |
|
---|
1335 | *done = TRUE; /* unconditionally */
|
---|
1336 |
|
---|
1337 | result = init_telnet(conn);
|
---|
1338 | if(result)
|
---|
1339 | return result;
|
---|
1340 |
|
---|
1341 | tn = (struct TELNET *)data->req.protop;
|
---|
1342 |
|
---|
1343 | result = check_telnet_options(conn);
|
---|
1344 | if(result)
|
---|
1345 | return result;
|
---|
1346 |
|
---|
1347 | #ifdef USE_WINSOCK
|
---|
1348 | /*
|
---|
1349 | ** This functionality only works with WinSock >= 2.0. So,
|
---|
1350 | ** make sure we have it.
|
---|
1351 | */
|
---|
1352 | result = check_wsock2(data);
|
---|
1353 | if(result)
|
---|
1354 | return result;
|
---|
1355 |
|
---|
1356 | /* OK, so we have WinSock 2.0. We need to dynamically */
|
---|
1357 | /* load ws2_32.dll and get the function pointers we need. */
|
---|
1358 | wsock2 = Curl_load_library(TEXT("WS2_32.DLL"));
|
---|
1359 | if(wsock2 == NULL) {
|
---|
1360 | failf(data, "failed to load WS2_32.DLL (%u)", GetLastError());
|
---|
1361 | return CURLE_FAILED_INIT;
|
---|
1362 | }
|
---|
1363 |
|
---|
1364 | /* Grab a pointer to WSACreateEvent */
|
---|
1365 | create_event_func = GetProcAddress(wsock2, "WSACreateEvent");
|
---|
1366 | if(create_event_func == NULL) {
|
---|
1367 | failf(data, "failed to find WSACreateEvent function (%u)", GetLastError());
|
---|
1368 | FreeLibrary(wsock2);
|
---|
1369 | return CURLE_FAILED_INIT;
|
---|
1370 | }
|
---|
1371 |
|
---|
1372 | /* And WSACloseEvent */
|
---|
1373 | close_event_func = GetProcAddress(wsock2, "WSACloseEvent");
|
---|
1374 | if(close_event_func == NULL) {
|
---|
1375 | failf(data, "failed to find WSACloseEvent function (%u)", GetLastError());
|
---|
1376 | FreeLibrary(wsock2);
|
---|
1377 | return CURLE_FAILED_INIT;
|
---|
1378 | }
|
---|
1379 |
|
---|
1380 | /* And WSAEventSelect */
|
---|
1381 | event_select_func = GetProcAddress(wsock2, "WSAEventSelect");
|
---|
1382 | if(event_select_func == NULL) {
|
---|
1383 | failf(data, "failed to find WSAEventSelect function (%u)", GetLastError());
|
---|
1384 | FreeLibrary(wsock2);
|
---|
1385 | return CURLE_FAILED_INIT;
|
---|
1386 | }
|
---|
1387 |
|
---|
1388 | /* And WSAEnumNetworkEvents */
|
---|
1389 | enum_netevents_func = GetProcAddress(wsock2, "WSAEnumNetworkEvents");
|
---|
1390 | if(enum_netevents_func == NULL) {
|
---|
1391 | failf(data, "failed to find WSAEnumNetworkEvents function (%u)",
|
---|
1392 | GetLastError());
|
---|
1393 | FreeLibrary(wsock2);
|
---|
1394 | return CURLE_FAILED_INIT;
|
---|
1395 | }
|
---|
1396 |
|
---|
1397 | /* We want to wait for both stdin and the socket. Since
|
---|
1398 | ** the select() function in winsock only works on sockets
|
---|
1399 | ** we have to use the WaitForMultipleObjects() call.
|
---|
1400 | */
|
---|
1401 |
|
---|
1402 | /* First, create a sockets event object */
|
---|
1403 | event_handle = (WSAEVENT)create_event_func();
|
---|
1404 | if(event_handle == WSA_INVALID_EVENT) {
|
---|
1405 | failf(data, "WSACreateEvent failed (%d)", SOCKERRNO);
|
---|
1406 | FreeLibrary(wsock2);
|
---|
1407 | return CURLE_FAILED_INIT;
|
---|
1408 | }
|
---|
1409 |
|
---|
1410 | /* Tell winsock what events we want to listen to */
|
---|
1411 | if(event_select_func(sockfd, event_handle, FD_READ|FD_CLOSE) ==
|
---|
1412 | SOCKET_ERROR) {
|
---|
1413 | close_event_func(event_handle);
|
---|
1414 | FreeLibrary(wsock2);
|
---|
1415 | return CURLE_OK;
|
---|
1416 | }
|
---|
1417 |
|
---|
1418 | /* The get the Windows file handle for stdin */
|
---|
1419 | stdin_handle = GetStdHandle(STD_INPUT_HANDLE);
|
---|
1420 |
|
---|
1421 | /* Create the list of objects to wait for */
|
---|
1422 | objs[0] = event_handle;
|
---|
1423 | objs[1] = stdin_handle;
|
---|
1424 |
|
---|
1425 | /* If stdin_handle is a pipe, use PeekNamedPipe() method to check it,
|
---|
1426 | else use the old WaitForMultipleObjects() way */
|
---|
1427 | if(GetFileType(stdin_handle) == FILE_TYPE_PIPE ||
|
---|
1428 | data->set.is_fread_set) {
|
---|
1429 | /* Don't wait for stdin_handle, just wait for event_handle */
|
---|
1430 | obj_count = 1;
|
---|
1431 | /* Check stdin_handle per 100 milliseconds */
|
---|
1432 | wait_timeout = 100;
|
---|
1433 | }
|
---|
1434 | else {
|
---|
1435 | obj_count = 2;
|
---|
1436 | wait_timeout = 1000;
|
---|
1437 | }
|
---|
1438 |
|
---|
1439 | /* Keep on listening and act on events */
|
---|
1440 | while(keepon) {
|
---|
1441 | const DWORD buf_size = (DWORD)data->set.buffer_size;
|
---|
1442 | waitret = WaitForMultipleObjects(obj_count, objs, FALSE, wait_timeout);
|
---|
1443 | switch(waitret) {
|
---|
1444 | case WAIT_TIMEOUT:
|
---|
1445 | {
|
---|
1446 | for(;;) {
|
---|
1447 | if(data->set.is_fread_set) {
|
---|
1448 | size_t n;
|
---|
1449 | /* read from user-supplied method */
|
---|
1450 | n = data->state.fread_func(buf, 1, buf_size, data->state.in);
|
---|
1451 | if(n == CURL_READFUNC_ABORT) {
|
---|
1452 | keepon = FALSE;
|
---|
1453 | result = CURLE_READ_ERROR;
|
---|
1454 | break;
|
---|
1455 | }
|
---|
1456 |
|
---|
1457 | if(n == CURL_READFUNC_PAUSE)
|
---|
1458 | break;
|
---|
1459 |
|
---|
1460 | if(n == 0) /* no bytes */
|
---|
1461 | break;
|
---|
1462 |
|
---|
1463 | readfile_read = (DWORD)n; /* fall thru with number of bytes read */
|
---|
1464 | }
|
---|
1465 | else {
|
---|
1466 | /* read from stdin */
|
---|
1467 | if(!PeekNamedPipe(stdin_handle, NULL, 0, NULL,
|
---|
1468 | &readfile_read, NULL)) {
|
---|
1469 | keepon = FALSE;
|
---|
1470 | result = CURLE_READ_ERROR;
|
---|
1471 | break;
|
---|
1472 | }
|
---|
1473 |
|
---|
1474 | if(!readfile_read)
|
---|
1475 | break;
|
---|
1476 |
|
---|
1477 | if(!ReadFile(stdin_handle, buf, buf_size,
|
---|
1478 | &readfile_read, NULL)) {
|
---|
1479 | keepon = FALSE;
|
---|
1480 | result = CURLE_READ_ERROR;
|
---|
1481 | break;
|
---|
1482 | }
|
---|
1483 | }
|
---|
1484 |
|
---|
1485 | result = send_telnet_data(conn, buf, readfile_read);
|
---|
1486 | if(result) {
|
---|
1487 | keepon = FALSE;
|
---|
1488 | break;
|
---|
1489 | }
|
---|
1490 | }
|
---|
1491 | }
|
---|
1492 | break;
|
---|
1493 |
|
---|
1494 | case WAIT_OBJECT_0 + 1:
|
---|
1495 | {
|
---|
1496 | if(!ReadFile(stdin_handle, buf, buf_size,
|
---|
1497 | &readfile_read, NULL)) {
|
---|
1498 | keepon = FALSE;
|
---|
1499 | result = CURLE_READ_ERROR;
|
---|
1500 | break;
|
---|
1501 | }
|
---|
1502 |
|
---|
1503 | result = send_telnet_data(conn, buf, readfile_read);
|
---|
1504 | if(result) {
|
---|
1505 | keepon = FALSE;
|
---|
1506 | break;
|
---|
1507 | }
|
---|
1508 | }
|
---|
1509 | break;
|
---|
1510 |
|
---|
1511 | case WAIT_OBJECT_0:
|
---|
1512 |
|
---|
1513 | events.lNetworkEvents = 0;
|
---|
1514 | if(SOCKET_ERROR == enum_netevents_func(sockfd, event_handle, &events)) {
|
---|
1515 | err = SOCKERRNO;
|
---|
1516 | if(err != EINPROGRESS) {
|
---|
1517 | infof(data, "WSAEnumNetworkEvents failed (%d)", err);
|
---|
1518 | keepon = FALSE;
|
---|
1519 | result = CURLE_READ_ERROR;
|
---|
1520 | }
|
---|
1521 | break;
|
---|
1522 | }
|
---|
1523 | if(events.lNetworkEvents & FD_READ) {
|
---|
1524 | /* read data from network */
|
---|
1525 | result = Curl_read(conn, sockfd, buf, data->set.buffer_size, &nread);
|
---|
1526 | /* read would've blocked. Loop again */
|
---|
1527 | if(result == CURLE_AGAIN)
|
---|
1528 | break;
|
---|
1529 | /* returned not-zero, this an error */
|
---|
1530 | else if(result) {
|
---|
1531 | keepon = FALSE;
|
---|
1532 | break;
|
---|
1533 | }
|
---|
1534 | /* returned zero but actually received 0 or less here,
|
---|
1535 | the server closed the connection and we bail out */
|
---|
1536 | else if(nread <= 0) {
|
---|
1537 | keepon = FALSE;
|
---|
1538 | break;
|
---|
1539 | }
|
---|
1540 |
|
---|
1541 | result = telrcv(conn, (unsigned char *) buf, nread);
|
---|
1542 | if(result) {
|
---|
1543 | keepon = FALSE;
|
---|
1544 | break;
|
---|
1545 | }
|
---|
1546 |
|
---|
1547 | /* Negotiate if the peer has started negotiating,
|
---|
1548 | otherwise don't. We don't want to speak telnet with
|
---|
1549 | non-telnet servers, like POP or SMTP. */
|
---|
1550 | if(tn->please_negotiate && !tn->already_negotiated) {
|
---|
1551 | negotiate(conn);
|
---|
1552 | tn->already_negotiated = 1;
|
---|
1553 | }
|
---|
1554 | }
|
---|
1555 | if(events.lNetworkEvents & FD_CLOSE) {
|
---|
1556 | keepon = FALSE;
|
---|
1557 | }
|
---|
1558 | break;
|
---|
1559 |
|
---|
1560 | }
|
---|
1561 |
|
---|
1562 | if(data->set.timeout) {
|
---|
1563 | now = Curl_now();
|
---|
1564 | if(Curl_timediff(now, conn->created) >= data->set.timeout) {
|
---|
1565 | failf(data, "Time-out");
|
---|
1566 | result = CURLE_OPERATION_TIMEDOUT;
|
---|
1567 | keepon = FALSE;
|
---|
1568 | }
|
---|
1569 | }
|
---|
1570 | }
|
---|
1571 |
|
---|
1572 | /* We called WSACreateEvent, so call WSACloseEvent */
|
---|
1573 | if(!close_event_func(event_handle)) {
|
---|
1574 | infof(data, "WSACloseEvent failed (%d)", SOCKERRNO);
|
---|
1575 | }
|
---|
1576 |
|
---|
1577 | /* "Forget" pointers into the library we're about to free */
|
---|
1578 | create_event_func = NULL;
|
---|
1579 | close_event_func = NULL;
|
---|
1580 | event_select_func = NULL;
|
---|
1581 | enum_netevents_func = NULL;
|
---|
1582 |
|
---|
1583 | /* We called LoadLibrary, so call FreeLibrary */
|
---|
1584 | if(!FreeLibrary(wsock2))
|
---|
1585 | infof(data, "FreeLibrary(wsock2) failed (%u)", GetLastError());
|
---|
1586 | #else
|
---|
1587 | pfd[0].fd = sockfd;
|
---|
1588 | pfd[0].events = POLLIN;
|
---|
1589 |
|
---|
1590 | if(data->set.is_fread_set) {
|
---|
1591 | poll_cnt = 1;
|
---|
1592 | interval_ms = 100; /* poll user-supplied read function */
|
---|
1593 | }
|
---|
1594 | else {
|
---|
1595 | /* really using fread, so infile is a FILE* */
|
---|
1596 | pfd[1].fd = fileno((FILE *)data->state.in);
|
---|
1597 | pfd[1].events = POLLIN;
|
---|
1598 | poll_cnt = 2;
|
---|
1599 | interval_ms = 1 * 1000;
|
---|
1600 | }
|
---|
1601 |
|
---|
1602 | while(keepon) {
|
---|
1603 | switch(Curl_poll(pfd, poll_cnt, interval_ms)) {
|
---|
1604 | case -1: /* error, stop reading */
|
---|
1605 | keepon = FALSE;
|
---|
1606 | continue;
|
---|
1607 | case 0: /* timeout */
|
---|
1608 | pfd[0].revents = 0;
|
---|
1609 | pfd[1].revents = 0;
|
---|
1610 | /* fall through */
|
---|
1611 | default: /* read! */
|
---|
1612 | if(pfd[0].revents & POLLIN) {
|
---|
1613 | /* read data from network */
|
---|
1614 | result = Curl_read(conn, sockfd, buf, data->set.buffer_size, &nread);
|
---|
1615 | /* read would've blocked. Loop again */
|
---|
1616 | if(result == CURLE_AGAIN)
|
---|
1617 | break;
|
---|
1618 | /* returned not-zero, this an error */
|
---|
1619 | if(result) {
|
---|
1620 | keepon = FALSE;
|
---|
1621 | break;
|
---|
1622 | }
|
---|
1623 | /* returned zero but actually received 0 or less here,
|
---|
1624 | the server closed the connection and we bail out */
|
---|
1625 | else if(nread <= 0) {
|
---|
1626 | keepon = FALSE;
|
---|
1627 | break;
|
---|
1628 | }
|
---|
1629 |
|
---|
1630 | total_dl += nread;
|
---|
1631 | Curl_pgrsSetDownloadCounter(data, total_dl);
|
---|
1632 | result = telrcv(conn, (unsigned char *)buf, nread);
|
---|
1633 | if(result) {
|
---|
1634 | keepon = FALSE;
|
---|
1635 | break;
|
---|
1636 | }
|
---|
1637 |
|
---|
1638 | /* Negotiate if the peer has started negotiating,
|
---|
1639 | otherwise don't. We don't want to speak telnet with
|
---|
1640 | non-telnet servers, like POP or SMTP. */
|
---|
1641 | if(tn->please_negotiate && !tn->already_negotiated) {
|
---|
1642 | negotiate(conn);
|
---|
1643 | tn->already_negotiated = 1;
|
---|
1644 | }
|
---|
1645 | }
|
---|
1646 |
|
---|
1647 | nread = 0;
|
---|
1648 | if(poll_cnt == 2) {
|
---|
1649 | if(pfd[1].revents & POLLIN) { /* read from in file */
|
---|
1650 | nread = read(pfd[1].fd, buf, data->set.buffer_size);
|
---|
1651 | }
|
---|
1652 | }
|
---|
1653 | else {
|
---|
1654 | /* read from user-supplied method */
|
---|
1655 | nread = (int)data->state.fread_func(buf, 1, data->set.buffer_size,
|
---|
1656 | data->state.in);
|
---|
1657 | if(nread == CURL_READFUNC_ABORT) {
|
---|
1658 | keepon = FALSE;
|
---|
1659 | break;
|
---|
1660 | }
|
---|
1661 | if(nread == CURL_READFUNC_PAUSE)
|
---|
1662 | break;
|
---|
1663 | }
|
---|
1664 |
|
---|
1665 | if(nread > 0) {
|
---|
1666 | result = send_telnet_data(conn, buf, nread);
|
---|
1667 | if(result) {
|
---|
1668 | keepon = FALSE;
|
---|
1669 | break;
|
---|
1670 | }
|
---|
1671 | total_ul += nread;
|
---|
1672 | Curl_pgrsSetUploadCounter(data, total_ul);
|
---|
1673 | }
|
---|
1674 | else if(nread < 0)
|
---|
1675 | keepon = FALSE;
|
---|
1676 |
|
---|
1677 | break;
|
---|
1678 | } /* poll switch statement */
|
---|
1679 |
|
---|
1680 | if(data->set.timeout) {
|
---|
1681 | now = Curl_now();
|
---|
1682 | if(Curl_timediff(now, conn->created) >= data->set.timeout) {
|
---|
1683 | failf(data, "Time-out");
|
---|
1684 | result = CURLE_OPERATION_TIMEDOUT;
|
---|
1685 | keepon = FALSE;
|
---|
1686 | }
|
---|
1687 | }
|
---|
1688 |
|
---|
1689 | if(Curl_pgrsUpdate(conn)) {
|
---|
1690 | result = CURLE_ABORTED_BY_CALLBACK;
|
---|
1691 | break;
|
---|
1692 | }
|
---|
1693 | }
|
---|
1694 | #endif
|
---|
1695 | /* mark this as "no further transfer wanted" */
|
---|
1696 | Curl_setup_transfer(conn, -1, -1, FALSE, NULL, -1, NULL);
|
---|
1697 |
|
---|
1698 | return result;
|
---|
1699 | }
|
---|
1700 | #endif
|
---|