c5e438ec |
1 | /* |
2 | * PLink - a command-line (stdin/stdout) variant of PuTTY. |
3 | */ |
4 | |
5 | #include <stdio.h> |
6 | #include <stdlib.h> |
5673d44e |
7 | #include <errno.h> |
c5e438ec |
8 | #include <assert.h> |
9 | #include <stdarg.h> |
5673d44e |
10 | #include <signal.h> |
c5e438ec |
11 | #include <unistd.h> |
12 | #include <fcntl.h> |
13 | #include <termios.h> |
5a9eb105 |
14 | #include <pwd.h> |
15 | #include <sys/ioctl.h> |
154c73d5 |
16 | #include <sys/time.h> |
17 | #ifndef HAVE_NO_SYS_SELECT_H |
2a6848cc |
18 | #include <sys/select.h> |
154c73d5 |
19 | #endif |
c5e438ec |
20 | |
c5e438ec |
21 | #define PUTTY_DO_GLOBALS /* actually _define_ globals */ |
22 | #include "putty.h" |
23 | #include "storage.h" |
24 | #include "tree234.h" |
25 | |
26 | #define MAX_STDIN_BACKLOG 4096 |
27 | |
7bfc5fd0 |
28 | void *logctx; |
29 | |
f7397dc6 |
30 | static struct termios orig_termios; |
31 | |
c5e438ec |
32 | void fatalbox(char *p, ...) |
33 | { |
f7397dc6 |
34 | struct termios cf; |
c5e438ec |
35 | va_list ap; |
f7397dc6 |
36 | premsg(&cf); |
c5e438ec |
37 | fprintf(stderr, "FATAL ERROR: "); |
38 | va_start(ap, p); |
39 | vfprintf(stderr, p, ap); |
40 | va_end(ap); |
41 | fputc('\n', stderr); |
f7397dc6 |
42 | postmsg(&cf); |
7bfc5fd0 |
43 | if (logctx) { |
44 | log_free(logctx); |
45 | logctx = NULL; |
46 | } |
c5e438ec |
47 | cleanup_exit(1); |
48 | } |
49 | void modalfatalbox(char *p, ...) |
50 | { |
f7397dc6 |
51 | struct termios cf; |
c5e438ec |
52 | va_list ap; |
f7397dc6 |
53 | premsg(&cf); |
c5e438ec |
54 | fprintf(stderr, "FATAL ERROR: "); |
55 | va_start(ap, p); |
56 | vfprintf(stderr, p, ap); |
57 | va_end(ap); |
58 | fputc('\n', stderr); |
f7397dc6 |
59 | postmsg(&cf); |
7bfc5fd0 |
60 | if (logctx) { |
61 | log_free(logctx); |
62 | logctx = NULL; |
63 | } |
c5e438ec |
64 | cleanup_exit(1); |
65 | } |
66 | void connection_fatal(void *frontend, char *p, ...) |
67 | { |
f7397dc6 |
68 | struct termios cf; |
c5e438ec |
69 | va_list ap; |
f7397dc6 |
70 | premsg(&cf); |
c5e438ec |
71 | fprintf(stderr, "FATAL ERROR: "); |
72 | va_start(ap, p); |
73 | vfprintf(stderr, p, ap); |
74 | va_end(ap); |
75 | fputc('\n', stderr); |
f7397dc6 |
76 | postmsg(&cf); |
7bfc5fd0 |
77 | if (logctx) { |
78 | log_free(logctx); |
79 | logctx = NULL; |
80 | } |
c5e438ec |
81 | cleanup_exit(1); |
82 | } |
83 | void cmdline_error(char *p, ...) |
84 | { |
f7397dc6 |
85 | struct termios cf; |
c5e438ec |
86 | va_list ap; |
f7397dc6 |
87 | premsg(&cf); |
c5e438ec |
88 | fprintf(stderr, "plink: "); |
89 | va_start(ap, p); |
90 | vfprintf(stderr, p, ap); |
91 | va_end(ap); |
92 | fputc('\n', stderr); |
f7397dc6 |
93 | postmsg(&cf); |
c5e438ec |
94 | exit(1); |
95 | } |
96 | |
21226fd7 |
97 | static int local_tty = FALSE; /* do we have a local tty? */ |
c5e438ec |
98 | |
99 | static Backend *back; |
100 | static void *backhandle; |
4a693cfc |
101 | static Conf *conf; |
c5e438ec |
102 | |
5a9eb105 |
103 | /* |
104 | * Default settings that are specific to pterm. |
105 | */ |
c85623f9 |
106 | char *platform_default_s(const char *name) |
5a9eb105 |
107 | { |
5a9eb105 |
108 | if (!strcmp(name, "TermType")) |
799dfcfa |
109 | return dupstr(getenv("TERM")); |
42af6a67 |
110 | if (!strcmp(name, "UserName")) |
111 | return get_username(); |
aef05b78 |
112 | if (!strcmp(name, "SerialLine")) |
113 | return dupstr("/dev/ttyS0"); |
5a9eb105 |
114 | return NULL; |
115 | } |
116 | |
c85623f9 |
117 | int platform_default_i(const char *name, int def) |
5a9eb105 |
118 | { |
119 | if (!strcmp(name, "TermWidth") || |
120 | !strcmp(name, "TermHeight")) { |
121 | struct winsize size; |
21226fd7 |
122 | if (ioctl(STDIN_FILENO, TIOCGWINSZ, (void *)&size) >= 0) |
5a9eb105 |
123 | return (!strcmp(name, "TermWidth") ? size.ws_col : size.ws_row); |
124 | } |
125 | return def; |
126 | } |
127 | |
ae62eaeb |
128 | FontSpec *platform_default_fontspec(const char *name) |
9a30e26b |
129 | { |
ae62eaeb |
130 | return fontspec_new(""); |
9a30e26b |
131 | } |
132 | |
962468d4 |
133 | Filename *platform_default_filename(const char *name) |
9a30e26b |
134 | { |
9a30e26b |
135 | if (!strcmp(name, "LogFileName")) |
962468d4 |
136 | return filename_from_str("putty.log"); |
9a30e26b |
137 | else |
962468d4 |
138 | return filename_from_str(""); |
9a30e26b |
139 | } |
140 | |
c85623f9 |
141 | char *x_get_default(const char *key) |
c5e438ec |
142 | { |
143 | return NULL; /* this is a stub */ |
144 | } |
145 | int term_ldisc(Terminal *term, int mode) |
146 | { |
147 | return FALSE; |
148 | } |
149 | void ldisc_update(void *frontend, int echo, int edit) |
150 | { |
151 | /* Update stdin read mode to reflect changes in line discipline. */ |
152 | struct termios mode; |
153 | |
c6ccd5c2 |
154 | if (!local_tty) return; |
155 | |
c5e438ec |
156 | mode = orig_termios; |
157 | |
158 | if (echo) |
159 | mode.c_lflag |= ECHO; |
160 | else |
161 | mode.c_lflag &= ~ECHO; |
162 | |
8cdf0e5f |
163 | if (edit) { |
164 | mode.c_iflag |= ICRNL; |
c5e438ec |
165 | mode.c_lflag |= ISIG | ICANON; |
e8269d30 |
166 | mode.c_oflag |= OPOST; |
8cdf0e5f |
167 | } else { |
168 | mode.c_iflag &= ~ICRNL; |
c5e438ec |
169 | mode.c_lflag &= ~(ISIG | ICANON); |
e8269d30 |
170 | mode.c_oflag &= ~OPOST; |
c6ccd5c2 |
171 | /* Solaris sets these to unhelpful values */ |
259d0428 |
172 | mode.c_cc[VMIN] = 1; |
173 | mode.c_cc[VTIME] = 0; |
c6ccd5c2 |
174 | /* FIXME: perhaps what we do with IXON/IXOFF should be an |
175 | * argument to ldisc_update(), to allow implementation of SSH-2 |
176 | * "xon-xoff" and Rlogin's equivalent? */ |
177 | mode.c_iflag &= ~IXON; |
178 | mode.c_iflag &= ~IXOFF; |
8cdf0e5f |
179 | } |
d0cb8c0c |
180 | /* |
181 | * Mark parity errors and (more important) BREAK on input. This |
182 | * is more complex than it need be because POSIX-2001 suggests |
183 | * that escaping of valid 0xff in the input stream is dependent on |
184 | * IGNPAR being clear even though marking of BREAK isn't. NetBSD |
185 | * 2.0 goes one worse and makes it dependent on INPCK too. We |
186 | * deal with this by forcing these flags into a useful state and |
187 | * then faking the state in which we found them in from_tty() if |
188 | * we get passed a parity or framing error. |
189 | */ |
190 | mode.c_iflag = (mode.c_iflag | INPCK | PARMRK) & ~IGNPAR; |
c5e438ec |
191 | |
21226fd7 |
192 | tcsetattr(STDIN_FILENO, TCSANOW, &mode); |
c5e438ec |
193 | } |
194 | |
c6ccd5c2 |
195 | /* Helper function to extract a special character from a termios. */ |
196 | static char *get_ttychar(struct termios *t, int index) |
197 | { |
198 | cc_t c = t->c_cc[index]; |
199 | #if defined(_POSIX_VDISABLE) |
200 | if (c == _POSIX_VDISABLE) |
201 | return dupprintf(""); |
202 | #endif |
203 | return dupprintf("^<%d>", c); |
204 | } |
205 | |
206 | char *get_ttymode(void *frontend, const char *mode) |
207 | { |
208 | /* |
209 | * Propagate appropriate terminal modes from the local terminal, |
210 | * if any. |
211 | */ |
212 | if (!local_tty) return NULL; |
213 | |
214 | #define GET_CHAR(ourname, uxname) \ |
215 | do { \ |
216 | if (strcmp(mode, ourname) == 0) \ |
217 | return get_ttychar(&orig_termios, uxname); \ |
218 | } while(0) |
219 | #define GET_BOOL(ourname, uxname, uxmemb, transform) \ |
220 | do { \ |
221 | if (strcmp(mode, ourname) == 0) { \ |
222 | int b = (orig_termios.uxmemb & uxname) != 0; \ |
223 | transform; \ |
224 | return dupprintf("%d", b); \ |
225 | } \ |
226 | } while (0) |
227 | |
228 | /* |
229 | * Modes that want to be the same on all terminal devices involved. |
230 | */ |
231 | /* All the special characters supported by SSH */ |
232 | #if defined(VINTR) |
233 | GET_CHAR("INTR", VINTR); |
234 | #endif |
235 | #if defined(VQUIT) |
236 | GET_CHAR("QUIT", VQUIT); |
237 | #endif |
238 | #if defined(VERASE) |
239 | GET_CHAR("ERASE", VERASE); |
240 | #endif |
241 | #if defined(VKILL) |
242 | GET_CHAR("KILL", VKILL); |
243 | #endif |
244 | #if defined(VEOF) |
245 | GET_CHAR("EOF", VEOF); |
246 | #endif |
247 | #if defined(VEOL) |
248 | GET_CHAR("EOL", VEOL); |
249 | #endif |
250 | #if defined(VEOL2) |
251 | GET_CHAR("EOL2", VEOL2); |
252 | #endif |
253 | #if defined(VSTART) |
254 | GET_CHAR("START", VSTART); |
255 | #endif |
256 | #if defined(VSTOP) |
257 | GET_CHAR("STOP", VSTOP); |
258 | #endif |
259 | #if defined(VSUSP) |
260 | GET_CHAR("SUSP", VSUSP); |
261 | #endif |
262 | #if defined(VDSUSP) |
263 | GET_CHAR("DSUSP", VDSUSP); |
264 | #endif |
265 | #if defined(VREPRINT) |
266 | GET_CHAR("REPRINT", VREPRINT); |
267 | #endif |
268 | #if defined(VWERASE) |
269 | GET_CHAR("WERASE", VWERASE); |
270 | #endif |
271 | #if defined(VLNEXT) |
272 | GET_CHAR("LNEXT", VLNEXT); |
273 | #endif |
274 | #if defined(VFLUSH) |
275 | GET_CHAR("FLUSH", VFLUSH); |
276 | #endif |
277 | #if defined(VSWTCH) |
278 | GET_CHAR("SWTCH", VSWTCH); |
279 | #endif |
280 | #if defined(VSTATUS) |
281 | GET_CHAR("STATUS", VSTATUS); |
282 | #endif |
283 | #if defined(VDISCARD) |
284 | GET_CHAR("DISCARD", VDISCARD); |
285 | #endif |
286 | /* Modes that "configure" other major modes. These should probably be |
287 | * considered as user preferences. */ |
288 | /* Configuration of ICANON */ |
289 | #if defined(ECHOK) |
290 | GET_BOOL("ECHOK", ECHOK, c_lflag, ); |
291 | #endif |
292 | #if defined(ECHOKE) |
293 | GET_BOOL("ECHOKE", ECHOKE, c_lflag, ); |
294 | #endif |
295 | #if defined(ECHOE) |
296 | GET_BOOL("ECHOE", ECHOE, c_lflag, ); |
297 | #endif |
298 | #if defined(ECHONL) |
299 | GET_BOOL("ECHONL", ECHONL, c_lflag, ); |
300 | #endif |
301 | #if defined(XCASE) |
302 | GET_BOOL("XCASE", XCASE, c_lflag, ); |
303 | #endif |
304 | /* Configuration of ECHO */ |
305 | #if defined(ECHOCTL) |
306 | GET_BOOL("ECHOCTL", ECHOCTL, c_lflag, ); |
307 | #endif |
308 | /* Configuration of IXON/IXOFF */ |
309 | #if defined(IXANY) |
310 | GET_BOOL("IXANY", IXANY, c_iflag, ); |
311 | #endif |
e8269d30 |
312 | /* Configuration of OPOST */ |
7016cde4 |
313 | #if defined(OLCUC) |
314 | GET_BOOL("OLCUC", OLCUC, c_oflag, ); |
315 | #endif |
e8269d30 |
316 | #if defined(ONLCR) |
317 | GET_BOOL("ONLCR", ONLCR, c_oflag, ); |
318 | #endif |
319 | #if defined(OCRNL) |
320 | GET_BOOL("OCRNL", OCRNL, c_oflag, ); |
321 | #endif |
322 | #if defined(ONOCR) |
323 | GET_BOOL("ONOCR", ONOCR, c_oflag, ); |
324 | #endif |
20923089 |
325 | #if defined(ONLRET) |
e8269d30 |
326 | GET_BOOL("ONLRET", ONLRET, c_oflag, ); |
327 | #endif |
c6ccd5c2 |
328 | |
329 | /* |
330 | * Modes that want to be set in only one place, and that we have |
331 | * squashed locally. |
332 | */ |
333 | #if defined(ISIG) |
334 | GET_BOOL("ISIG", ISIG, c_lflag, ); |
335 | #endif |
336 | #if defined(ICANON) |
337 | GET_BOOL("ICANON", ICANON, c_lflag, ); |
338 | #endif |
339 | #if defined(ECHO) |
340 | GET_BOOL("ECHO", ECHO, c_lflag, ); |
341 | #endif |
342 | #if defined(IXON) |
343 | GET_BOOL("IXON", IXON, c_iflag, ); |
344 | #endif |
345 | #if defined(IXOFF) |
346 | GET_BOOL("IXOFF", IXOFF, c_iflag, ); |
347 | #endif |
e8269d30 |
348 | #if defined(OPOST) |
349 | GET_BOOL("OPOST", OPOST, c_oflag, ); |
350 | #endif |
c6ccd5c2 |
351 | |
352 | /* |
353 | * We do not propagate the following modes: |
354 | * - Parity/serial settings, which are a local affair and don't |
355 | * make sense propagated over SSH's 8-bit byte-stream. |
356 | * IGNPAR PARMRK INPCK CS7 CS8 PARENB PARODD |
357 | * - Things that want to be enabled in one place that we don't |
358 | * squash locally. |
7016cde4 |
359 | * IUCLC |
c6ccd5c2 |
360 | * - Status bits. |
361 | * PENDIN |
362 | * - Things I don't know what to do with. (FIXME) |
e8269d30 |
363 | * ISTRIP IMAXBEL NOFLSH TOSTOP IEXTEN |
364 | * INLCR IGNCR ICRNL |
c6ccd5c2 |
365 | */ |
366 | |
367 | #undef GET_CHAR |
368 | #undef GET_BOOL |
369 | |
370 | /* Fall through to here for unrecognised names, or ones that are |
371 | * unsupported on this platform */ |
372 | return NULL; |
373 | } |
374 | |
c5e438ec |
375 | void cleanup_termios(void) |
376 | { |
c6ccd5c2 |
377 | if (local_tty) |
21226fd7 |
378 | tcsetattr(STDIN_FILENO, TCSANOW, &orig_termios); |
c5e438ec |
379 | } |
380 | |
381 | bufchain stdout_data, stderr_data; |
bc06669b |
382 | enum { EOF_NO, EOF_PENDING, EOF_SENT } outgoingeof; |
c5e438ec |
383 | |
885f465f |
384 | int try_output(int is_stderr) |
c5e438ec |
385 | { |
386 | bufchain *chain = (is_stderr ? &stderr_data : &stdout_data); |
21226fd7 |
387 | int fd = (is_stderr ? STDERR_FILENO : STDOUT_FILENO); |
c5e438ec |
388 | void *senddata; |
7c28d8d6 |
389 | int sendlen, ret, fl; |
c5e438ec |
390 | |
bc06669b |
391 | if (bufchain_size(chain) > 0) { |
392 | fl = fcntl(fd, F_GETFL); |
393 | if (fl != -1 && !(fl & O_NONBLOCK)) |
394 | fcntl(fd, F_SETFL, fl | O_NONBLOCK); |
395 | do { |
396 | bufchain_prefix(chain, &senddata, &sendlen); |
397 | ret = write(fd, senddata, sendlen); |
398 | if (ret > 0) |
399 | bufchain_consume(chain, ret); |
400 | } while (ret == sendlen && bufchain_size(chain) != 0); |
401 | if (fl != -1 && !(fl & O_NONBLOCK)) |
402 | fcntl(fd, F_SETFL, fl); |
403 | if (ret < 0 && errno != EAGAIN) { |
404 | perror(is_stderr ? "stderr: write" : "stdout: write"); |
405 | exit(1); |
406 | } |
407 | } |
408 | if (outgoingeof == EOF_PENDING && bufchain_size(&stdout_data) == 0) { |
409 | close(STDOUT_FILENO); |
410 | outgoingeof = EOF_SENT; |
c5e438ec |
411 | } |
885f465f |
412 | return bufchain_size(&stdout_data) + bufchain_size(&stderr_data); |
c5e438ec |
413 | } |
414 | |
9fab77dc |
415 | int from_backend(void *frontend_handle, int is_stderr, |
416 | const char *data, int len) |
c5e438ec |
417 | { |
c5e438ec |
418 | if (is_stderr) { |
419 | bufchain_add(&stderr_data, data, len); |
885f465f |
420 | return try_output(TRUE); |
c5e438ec |
421 | } else { |
bc06669b |
422 | assert(outgoingeof == EOF_NO); |
c5e438ec |
423 | bufchain_add(&stdout_data, data, len); |
885f465f |
424 | return try_output(FALSE); |
c5e438ec |
425 | } |
c5e438ec |
426 | } |
427 | |
edd0cb8a |
428 | int from_backend_untrusted(void *frontend_handle, const char *data, int len) |
429 | { |
430 | /* |
431 | * No "untrusted" output should get here (the way the code is |
432 | * currently, it's all diverted by FLAG_STDERR). |
433 | */ |
434 | assert(!"Unexpected call to from_backend_untrusted()"); |
435 | return 0; /* not reached */ |
436 | } |
437 | |
bc06669b |
438 | int from_backend_eof(void *frontend_handle) |
439 | { |
440 | assert(outgoingeof == EOF_NO); |
441 | outgoingeof = EOF_PENDING; |
442 | try_output(FALSE); |
443 | return FALSE; /* do not respond to incoming EOF with outgoing */ |
444 | } |
445 | |
edd0cb8a |
446 | int get_userpass_input(prompts_t *p, unsigned char *in, int inlen) |
447 | { |
448 | int ret; |
449 | ret = cmdline_get_passwd_input(p, in, inlen); |
450 | if (ret == -1) |
451 | ret = console_get_userpass_input(p, in, inlen); |
452 | return ret; |
453 | } |
454 | |
d0cb8c0c |
455 | /* |
456 | * Handle data from a local tty in PARMRK format. |
457 | */ |
deb0e1cf |
458 | static void from_tty(void *vbuf, unsigned len) |
d0cb8c0c |
459 | { |
deb0e1cf |
460 | char *p, *q, *end, *buf = vbuf; |
d0cb8c0c |
461 | static enum {NORMAL, FF, FF00} state = NORMAL; |
462 | |
463 | p = buf; end = buf + len; |
464 | while (p < end) { |
465 | switch (state) { |
466 | case NORMAL: |
467 | if (*p == '\xff') { |
468 | p++; |
469 | state = FF; |
470 | } else { |
471 | q = memchr(p, '\xff', end - p); |
472 | if (q == NULL) q = end; |
473 | back->send(backhandle, p, q - p); |
474 | p = q; |
475 | } |
476 | break; |
477 | case FF: |
478 | if (*p == '\xff') { |
479 | back->send(backhandle, p, 1); |
480 | p++; |
481 | state = NORMAL; |
482 | } else if (*p == '\0') { |
483 | p++; |
484 | state = FF00; |
485 | } else abort(); |
486 | break; |
487 | case FF00: |
488 | if (*p == '\0') { |
489 | back->special(backhandle, TS_BRK); |
490 | } else { |
491 | /* |
492 | * Pretend that PARMRK wasn't set. This involves |
493 | * faking what INPCK and IGNPAR would have done if |
494 | * we hadn't overridden them. Unfortunately, we |
495 | * can't do this entirely correctly because INPCK |
496 | * distinguishes between framing and parity |
497 | * errors, but PARMRK format represents both in |
498 | * the same way. We assume that parity errors are |
499 | * more common than framing errors, and hence |
500 | * treat all input errors as being subject to |
501 | * INPCK. |
502 | */ |
503 | if (orig_termios.c_iflag & INPCK) { |
504 | /* If IGNPAR is set, we throw away the character. */ |
505 | if (!(orig_termios.c_iflag & IGNPAR)) { |
506 | /* PE/FE get passed on as NUL. */ |
507 | *p = 0; |
508 | back->send(backhandle, p, 1); |
509 | } |
510 | } else { |
511 | /* INPCK not set. Assume we got a parity error. */ |
512 | back->send(backhandle, p, 1); |
513 | } |
514 | } |
515 | p++; |
516 | state = NORMAL; |
517 | } |
518 | } |
519 | } |
520 | |
5673d44e |
521 | int signalpipe[2]; |
522 | |
523 | void sigwinch(int signum) |
524 | { |
ecb25722 |
525 | if (write(signalpipe[1], "x", 1) <= 0) |
526 | /* not much we can do about it */; |
5673d44e |
527 | } |
528 | |
c5e438ec |
529 | /* |
74aca06d |
530 | * In Plink our selects are synchronous, so these functions are |
531 | * empty stubs. |
532 | */ |
533 | int uxsel_input_add(int fd, int rwx) { return 0; } |
534 | void uxsel_input_remove(int id) { } |
535 | |
536 | /* |
c5e438ec |
537 | * Short description of parameters. |
538 | */ |
539 | static void usage(void) |
540 | { |
541 | printf("PuTTY Link: command-line connection utility\n"); |
542 | printf("%s\n", ver); |
543 | printf("Usage: plink [options] [user@]host [command]\n"); |
544 | printf(" (\"host\" can also be a PuTTY saved session name)\n"); |
545 | printf("Options:\n"); |
2285d016 |
546 | printf(" -V print version information and exit\n"); |
547 | printf(" -pgpfp print PGP key fingerprints and exit\n"); |
c5e438ec |
548 | printf(" -v show verbose messages\n"); |
549 | printf(" -load sessname Load settings from saved session\n"); |
f41f07bc |
550 | printf(" -ssh -telnet -rlogin -raw -serial\n"); |
afd4d0d2 |
551 | printf(" force use of a particular protocol\n"); |
c5e438ec |
552 | printf(" -P port connect to specified port\n"); |
553 | printf(" -l user connect with specified username\n"); |
c5e438ec |
554 | printf(" -batch disable all interactive prompts\n"); |
555 | printf("The following options only apply to SSH connections:\n"); |
556 | printf(" -pw passw login with specified password\n"); |
dbe6c525 |
557 | printf(" -D [listen-IP:]listen-port\n"); |
558 | printf(" Dynamic SOCKS-based port forwarding\n"); |
559 | printf(" -L [listen-IP:]listen-port:host:port\n"); |
560 | printf(" Forward local port to remote address\n"); |
561 | printf(" -R [listen-IP:]listen-port:host:port\n"); |
562 | printf(" Forward remote port to local address\n"); |
c5e438ec |
563 | printf(" -X -x enable / disable X11 forwarding\n"); |
564 | printf(" -A -a enable / disable agent forwarding\n"); |
565 | printf(" -t -T enable / disable pty allocation\n"); |
566 | printf(" -1 -2 force use of particular protocol version\n"); |
05581745 |
567 | printf(" -4 -6 force use of IPv4 or IPv6\n"); |
c5e438ec |
568 | printf(" -C enable compression\n"); |
569 | printf(" -i key private key file for authentication\n"); |
e5708bc7 |
570 | printf(" -noagent disable use of Pageant\n"); |
571 | printf(" -agent enable use of Pageant\n"); |
54018d95 |
572 | printf(" -m file read remote command(s) from file\n"); |
09bdfcbb |
573 | printf(" -s remote command is an SSH subsystem (SSH-2 only)\n"); |
b72c366d |
574 | printf(" -N don't start a shell/command (SSH-2 only)\n"); |
23828b7e |
575 | printf(" -nc host:port\n"); |
576 | printf(" open tunnel in place of session (SSH-2 only)\n"); |
9621bbab |
577 | printf(" -sercfg configuration-string (e.g. 19200,8,n,1,X)\n"); |
578 | printf(" Specify the serial configuration (serial only)\n"); |
dc108ebc |
579 | exit(1); |
580 | } |
581 | |
582 | static void version(void) |
583 | { |
584 | printf("plink: %s\n", ver); |
c5e438ec |
585 | exit(1); |
586 | } |
587 | |
43a1c4a4 |
588 | void frontend_net_error_pending(void) {} |
589 | |
c5e438ec |
590 | int main(int argc, char **argv) |
591 | { |
592 | int sending; |
593 | int portnumber = -1; |
0ff9ea38 |
594 | int *fdlist; |
595 | int fd; |
596 | int i, fdcount, fdsize, fdstate; |
c5e438ec |
597 | int connopen; |
598 | int exitcode; |
86256dc6 |
599 | int errors; |
09bdfcbb |
600 | int use_subsystem = 0; |
f0f51e90 |
601 | int got_host = FALSE; |
39934deb |
602 | long now; |
c5e438ec |
603 | |
0ff9ea38 |
604 | fdlist = NULL; |
605 | fdcount = fdsize = 0; |
c5e438ec |
606 | /* |
607 | * Initialise port and protocol to sensible defaults. (These |
608 | * will be overridden by more or less anything.) |
609 | */ |
610 | default_protocol = PROT_SSH; |
611 | default_port = 22; |
612 | |
bc06669b |
613 | bufchain_init(&stdout_data); |
614 | bufchain_init(&stderr_data); |
615 | outgoingeof = EOF_NO; |
616 | |
f7397dc6 |
617 | flags = FLAG_STDERR | FLAG_STDERR_TTY; |
618 | |
619 | stderr_tty_init(); |
c5e438ec |
620 | /* |
621 | * Process the command line. |
622 | */ |
4a693cfc |
623 | conf = conf_new(); |
624 | do_defaults(NULL, conf); |
18e62ad8 |
625 | loaded_session = FALSE; |
4a693cfc |
626 | default_protocol = conf_get_int(conf, CONF_protocol); |
627 | default_port = conf_get_int(conf, CONF_port); |
86256dc6 |
628 | errors = 0; |
c5e438ec |
629 | { |
630 | /* |
631 | * Override the default protocol if PLINK_PROTOCOL is set. |
632 | */ |
633 | char *p = getenv("PLINK_PROTOCOL"); |
c5e438ec |
634 | if (p) { |
9e164d82 |
635 | const Backend *b = backend_from_name(p); |
636 | if (b) { |
4a693cfc |
637 | default_protocol = b->protocol; |
638 | default_port = b->default_port; |
639 | conf_set_int(conf, CONF_protocol, default_protocol); |
640 | conf_set_int(conf, CONF_port, default_port); |
c5e438ec |
641 | } |
642 | } |
643 | } |
644 | while (--argc) { |
645 | char *p = *++argv; |
646 | if (*p == '-') { |
9b41d3a8 |
647 | int ret = cmdline_process_param(p, (argc > 1 ? argv[1] : NULL), |
4a693cfc |
648 | 1, conf); |
c5e438ec |
649 | if (ret == -2) { |
650 | fprintf(stderr, |
651 | "plink: option \"%s\" requires an argument\n", p); |
86256dc6 |
652 | errors = 1; |
c5e438ec |
653 | } else if (ret == 2) { |
654 | --argc, ++argv; |
655 | } else if (ret == 1) { |
656 | continue; |
657 | } else if (!strcmp(p, "-batch")) { |
658 | console_batch_mode = 1; |
09bdfcbb |
659 | } else if (!strcmp(p, "-s")) { |
4a693cfc |
660 | /* Save status to write to conf later. */ |
09bdfcbb |
661 | use_subsystem = 1; |
dc108ebc |
662 | } else if (!strcmp(p, "-V")) { |
663 | version(); |
2285d016 |
664 | } else if (!strcmp(p, "-pgpfp")) { |
665 | pgp_fingerprints(); |
666 | exit(1); |
a0e5ed33 |
667 | } else if (!strcmp(p, "-o")) { |
86256dc6 |
668 | if (argc <= 1) { |
a0e5ed33 |
669 | fprintf(stderr, |
670 | "plink: option \"-o\" requires an argument\n"); |
86256dc6 |
671 | errors = 1; |
672 | } else { |
673 | --argc; |
674 | provide_xrm_string(*++argv); |
675 | } |
676 | } else { |
677 | fprintf(stderr, "plink: unknown option \"%s\"\n", p); |
678 | errors = 1; |
c5e438ec |
679 | } |
680 | } else if (*p) { |
4a693cfc |
681 | if (!conf_launchable(conf) || !(got_host || loaded_session)) { |
c5e438ec |
682 | char *q = p; |
a0e5ed33 |
683 | |
c5e438ec |
684 | /* |
685 | * If the hostname starts with "telnet:", set the |
686 | * protocol to Telnet and process the string as a |
687 | * Telnet URL. |
688 | */ |
689 | if (!strncmp(q, "telnet:", 7)) { |
690 | char c; |
691 | |
692 | q += 7; |
693 | if (q[0] == '/' && q[1] == '/') |
694 | q += 2; |
4a693cfc |
695 | conf_set_int(conf, CONF_protocol, PROT_TELNET); |
c5e438ec |
696 | p = q; |
697 | while (*p && *p != ':' && *p != '/') |
698 | p++; |
699 | c = *p; |
700 | if (*p) |
701 | *p++ = '\0'; |
702 | if (c == ':') |
4a693cfc |
703 | conf_set_int(conf, CONF_port, atoi(p)); |
c5e438ec |
704 | else |
4a693cfc |
705 | conf_set_int(conf, CONF_port, -1); |
706 | conf_set_str(conf, CONF_host, q); |
f0f51e90 |
707 | got_host = TRUE; |
c5e438ec |
708 | } else { |
3608528b |
709 | char *r, *user, *host; |
c5e438ec |
710 | /* |
711 | * Before we process the [user@]host string, we |
712 | * first check for the presence of a protocol |
713 | * prefix (a protocol name followed by ","). |
714 | */ |
715 | r = strchr(p, ','); |
716 | if (r) { |
9e164d82 |
717 | const Backend *b; |
718 | *r = '\0'; |
719 | b = backend_from_name(p); |
720 | if (b) { |
4a693cfc |
721 | default_protocol = b->protocol; |
722 | conf_set_int(conf, CONF_protocol, |
723 | default_protocol); |
9e164d82 |
724 | portnumber = b->default_port; |
c5e438ec |
725 | } |
9e164d82 |
726 | p = r + 1; |
c5e438ec |
727 | } |
728 | |
729 | /* |
3608528b |
730 | * A nonzero length string followed by an @ is treated |
731 | * as a username. (We discount an _initial_ @.) The |
732 | * rest of the string (or the whole string if no @) |
733 | * is treated as a session name and/or hostname. |
c5e438ec |
734 | */ |
735 | r = strrchr(p, '@'); |
736 | if (r == p) |
737 | p++, r = NULL; /* discount initial @ */ |
3608528b |
738 | if (r) { |
739 | *r++ = '\0'; |
740 | user = p, host = r; |
741 | } else { |
742 | user = NULL, host = p; |
743 | } |
744 | |
745 | /* |
746 | * Now attempt to load a saved session with the |
747 | * same name as the hostname. |
748 | */ |
749 | { |
4a693cfc |
750 | Conf *conf2 = conf_new(); |
751 | do_defaults(host, conf2); |
752 | if (loaded_session || !conf_launchable(conf2)) { |
c5e438ec |
753 | /* No settings for this host; use defaults */ |
18e62ad8 |
754 | /* (or session was already loaded with -load) */ |
4a693cfc |
755 | conf_set_str(conf, CONF_host, host); |
756 | conf_set_int(conf, CONF_port, default_port); |
f0f51e90 |
757 | got_host = TRUE; |
c5e438ec |
758 | } else { |
4a693cfc |
759 | conf_copy_into(conf, conf2); |
f0f51e90 |
760 | loaded_session = TRUE; |
c5e438ec |
761 | } |
4a693cfc |
762 | conf_free(conf2); |
3608528b |
763 | } |
764 | |
765 | if (user) { |
766 | /* Patch in specified username. */ |
4a693cfc |
767 | conf_set_str(conf, CONF_username, user); |
c5e438ec |
768 | } |
3608528b |
769 | |
c5e438ec |
770 | } |
771 | } else { |
772 | char *command; |
773 | int cmdlen, cmdsize; |
774 | cmdlen = cmdsize = 0; |
775 | command = NULL; |
776 | |
777 | while (argc) { |
778 | while (*p) { |
779 | if (cmdlen >= cmdsize) { |
780 | cmdsize = cmdlen + 512; |
3d88e64d |
781 | command = sresize(command, cmdsize, char); |
c5e438ec |
782 | } |
783 | command[cmdlen++]=*p++; |
784 | } |
785 | if (cmdlen >= cmdsize) { |
786 | cmdsize = cmdlen + 512; |
3d88e64d |
787 | command = sresize(command, cmdsize, char); |
c5e438ec |
788 | } |
789 | command[cmdlen++]=' '; /* always add trailing space */ |
790 | if (--argc) p = *++argv; |
791 | } |
792 | if (cmdlen) command[--cmdlen]='\0'; |
793 | /* change trailing blank to NUL */ |
4a693cfc |
794 | conf_set_str(conf, CONF_remote_cmd, command); |
795 | conf_set_str(conf, CONF_remote_cmd2, ""); |
796 | conf_set_int(conf, CONF_nopty, TRUE); /* command => no tty */ |
c5e438ec |
797 | |
798 | break; /* done with cmdline */ |
799 | } |
800 | } |
801 | } |
802 | |
86256dc6 |
803 | if (errors) |
804 | return 1; |
805 | |
4a693cfc |
806 | if (!conf_launchable(conf) || !(got_host || loaded_session)) { |
c5e438ec |
807 | usage(); |
808 | } |
809 | |
810 | /* |
4a693cfc |
811 | * Muck about with the hostname in various ways. |
c5e438ec |
812 | */ |
813 | { |
4a693cfc |
814 | char *hostbuf = dupstr(conf_get_str(conf, CONF_host)); |
815 | char *host = hostbuf; |
816 | char *p, *q; |
817 | |
818 | /* |
819 | * Trim leading whitespace. |
820 | */ |
821 | host += strspn(host, " \t"); |
c5e438ec |
822 | |
4a693cfc |
823 | /* |
824 | * See if host is of the form user@host, and separate out |
825 | * the username if so. |
826 | */ |
827 | if (host[0] != '\0') { |
828 | char *atsign = strrchr(host, '@'); |
829 | if (atsign) { |
830 | *atsign = '\0'; |
831 | conf_set_str(conf, CONF_username, host); |
832 | host = atsign + 1; |
c5e438ec |
833 | } |
c5e438ec |
834 | } |
4a693cfc |
835 | |
836 | /* |
837 | * Trim off a colon suffix if it's there. |
838 | */ |
839 | host[strcspn(host, ":")] = '\0'; |
840 | |
841 | /* |
842 | * Remove any remaining whitespace. |
843 | */ |
844 | p = hostbuf; |
845 | q = host; |
846 | while (*q) { |
847 | if (*q != ' ' && *q != '\t') |
848 | *p++ = *q; |
849 | q++; |
850 | } |
851 | *p = '\0'; |
852 | |
853 | conf_set_str(conf, CONF_host, hostbuf); |
854 | sfree(hostbuf); |
c5e438ec |
855 | } |
856 | |
857 | /* |
858 | * Perform command-line overrides on session configuration. |
859 | */ |
4a693cfc |
860 | cmdline_run_saved(conf); |
c5e438ec |
861 | |
862 | /* |
09bdfcbb |
863 | * Apply subsystem status. |
864 | */ |
865 | if (use_subsystem) |
4a693cfc |
866 | conf_set_int(conf, CONF_ssh_subsys, TRUE); |
c5e438ec |
867 | |
4a693cfc |
868 | if (!*conf_get_str(conf, CONF_remote_cmd) && |
869 | !*conf_get_str(conf, CONF_remote_cmd2) && |
870 | !*conf_get_str(conf, CONF_ssh_nc_host)) |
c5e438ec |
871 | flags |= FLAG_INTERACTIVE; |
872 | |
873 | /* |
874 | * Select protocol. This is farmed out into a table in a |
875 | * separate file to enable an ssh-free variant. |
876 | */ |
4a693cfc |
877 | back = backend_from_proto(conf_get_int(conf, CONF_protocol)); |
9e164d82 |
878 | if (back == NULL) { |
879 | fprintf(stderr, |
880 | "Internal fault: Unsupported protocol found\n"); |
881 | return 1; |
c5e438ec |
882 | } |
883 | |
884 | /* |
885 | * Select port. |
886 | */ |
887 | if (portnumber != -1) |
4a693cfc |
888 | conf_set_int(conf, CONF_port, portnumber); |
c5e438ec |
889 | |
5673d44e |
890 | /* |
1f39cbd0 |
891 | * Block SIGPIPE, so that we'll get EPIPE individually on |
892 | * particular network connections that go wrong. |
893 | */ |
894 | putty_signal(SIGPIPE, SIG_IGN); |
895 | |
896 | /* |
5673d44e |
897 | * Set up the pipe we'll use to tell us about SIGWINCH. |
898 | */ |
899 | if (pipe(signalpipe) < 0) { |
900 | perror("pipe"); |
901 | exit(1); |
902 | } |
903 | putty_signal(SIGWINCH, sigwinch); |
904 | |
c5e438ec |
905 | sk_init(); |
0ff9ea38 |
906 | uxsel_init(); |
c5e438ec |
907 | |
908 | /* |
61f62bb3 |
909 | * Unix Plink doesn't provide any way to add forwardings after the |
910 | * connection is set up, so if there are none now, we can safely set |
911 | * the "simple" flag. |
912 | */ |
4a693cfc |
913 | if (conf_get_int(conf, CONF_protocol) == PROT_SSH && |
914 | !conf_get_int(conf, CONF_x11_forward) && |
915 | !conf_get_int(conf, CONF_agentfwd) && |
916 | !conf_get_str_nthstrkey(conf, CONF_portfwd, 0)) |
917 | conf_set_int(conf, CONF_ssh_simple, TRUE); |
918 | |
61f62bb3 |
919 | /* |
c5e438ec |
920 | * Start up the connection. |
921 | */ |
4a693cfc |
922 | logctx = log_init(NULL, conf); |
b51259f6 |
923 | console_provide_logctx(logctx); |
c5e438ec |
924 | { |
cbe2d68f |
925 | const char *error; |
c5e438ec |
926 | char *realhost; |
927 | /* nodelay is only useful if stdin is a terminal device */ |
4a693cfc |
928 | int nodelay = conf_get_int(conf, CONF_tcp_nodelay) && isatty(0); |
c5e438ec |
929 | |
4a693cfc |
930 | error = back->init(NULL, &backhandle, conf, |
931 | conf_get_str(conf, CONF_host), |
932 | conf_get_int(conf, CONF_port), |
933 | &realhost, nodelay, |
934 | conf_get_int(conf, CONF_tcp_keepalives)); |
c5e438ec |
935 | if (error) { |
984992ef |
936 | fprintf(stderr, "Unable to open connection:\n%s\n", error); |
c5e438ec |
937 | return 1; |
938 | } |
c5e438ec |
939 | back->provide_logctx(backhandle, logctx); |
4a693cfc |
940 | ldisc_create(conf, NULL, back, backhandle, NULL); |
c5e438ec |
941 | sfree(realhost); |
942 | } |
943 | connopen = 1; |
944 | |
945 | /* |
946 | * Set up the initial console mode. We don't care if this call |
947 | * fails, because we know we aren't necessarily running in a |
948 | * console. |
949 | */ |
21226fd7 |
950 | local_tty = (tcgetattr(STDIN_FILENO, &orig_termios) == 0); |
c5e438ec |
951 | atexit(cleanup_termios); |
952 | ldisc_update(NULL, 1, 1); |
953 | sending = FALSE; |
39934deb |
954 | now = GETTICKCOUNT(); |
c5e438ec |
955 | |
956 | while (1) { |
957 | fd_set rset, wset, xset; |
958 | int maxfd; |
959 | int rwx; |
960 | int ret; |
961 | |
962 | FD_ZERO(&rset); |
963 | FD_ZERO(&wset); |
964 | FD_ZERO(&xset); |
965 | maxfd = 0; |
966 | |
5673d44e |
967 | FD_SET_MAX(signalpipe[0], maxfd, rset); |
968 | |
c5e438ec |
969 | if (connopen && !sending && |
6226c939 |
970 | back->connected(backhandle) && |
c5e438ec |
971 | back->sendok(backhandle) && |
972 | back->sendbuffer(backhandle) < MAX_STDIN_BACKLOG) { |
973 | /* If we're OK to send, then try to read from stdin. */ |
21226fd7 |
974 | FD_SET_MAX(STDIN_FILENO, maxfd, rset); |
c5e438ec |
975 | } |
976 | |
977 | if (bufchain_size(&stdout_data) > 0) { |
978 | /* If we have data for stdout, try to write to stdout. */ |
21226fd7 |
979 | FD_SET_MAX(STDOUT_FILENO, maxfd, wset); |
c5e438ec |
980 | } |
981 | |
982 | if (bufchain_size(&stderr_data) > 0) { |
983 | /* If we have data for stderr, try to write to stderr. */ |
21226fd7 |
984 | FD_SET_MAX(STDERR_FILENO, maxfd, wset); |
c5e438ec |
985 | } |
986 | |
0ff9ea38 |
987 | /* Count the currently active fds. */ |
c5e438ec |
988 | i = 0; |
0ff9ea38 |
989 | for (fd = first_fd(&fdstate, &rwx); fd >= 0; |
990 | fd = next_fd(&fdstate, &rwx)) i++; |
c5e438ec |
991 | |
0ff9ea38 |
992 | /* Expand the fdlist buffer if necessary. */ |
993 | if (i > fdsize) { |
994 | fdsize = i + 16; |
995 | fdlist = sresize(fdlist, fdsize, int); |
c5e438ec |
996 | } |
997 | |
998 | /* |
0ff9ea38 |
999 | * Add all currently open fds to the select sets, and store |
1000 | * them in fdlist as well. |
c5e438ec |
1001 | */ |
0ff9ea38 |
1002 | fdcount = 0; |
1003 | for (fd = first_fd(&fdstate, &rwx); fd >= 0; |
1004 | fd = next_fd(&fdstate, &rwx)) { |
1005 | fdlist[fdcount++] = fd; |
c5e438ec |
1006 | if (rwx & 1) |
0ff9ea38 |
1007 | FD_SET_MAX(fd, maxfd, rset); |
c5e438ec |
1008 | if (rwx & 2) |
0ff9ea38 |
1009 | FD_SET_MAX(fd, maxfd, wset); |
c5e438ec |
1010 | if (rwx & 4) |
0ff9ea38 |
1011 | FD_SET_MAX(fd, maxfd, xset); |
c5e438ec |
1012 | } |
1013 | |
5673d44e |
1014 | do { |
39934deb |
1015 | long next, ticks; |
1016 | struct timeval tv, *ptv; |
1017 | |
1018 | if (run_timers(now, &next)) { |
1019 | ticks = next - GETTICKCOUNT(); |
1020 | if (ticks < 0) ticks = 0; /* just in case */ |
1021 | tv.tv_sec = ticks / 1000; |
1022 | tv.tv_usec = ticks % 1000 * 1000; |
1023 | ptv = &tv; |
1024 | } else { |
1025 | ptv = NULL; |
1026 | } |
1027 | ret = select(maxfd, &rset, &wset, &xset, ptv); |
1028 | if (ret == 0) |
1029 | now = next; |
c2eb6cb7 |
1030 | else |
1031 | now = GETTICKCOUNT(); |
5673d44e |
1032 | } while (ret < 0 && errno == EINTR); |
c5e438ec |
1033 | |
1034 | if (ret < 0) { |
1035 | perror("select"); |
1036 | exit(1); |
1037 | } |
1038 | |
0ff9ea38 |
1039 | for (i = 0; i < fdcount; i++) { |
1040 | fd = fdlist[i]; |
56e5b2db |
1041 | /* |
1042 | * We must process exceptional notifications before |
1043 | * ordinary readability ones, or we may go straight |
1044 | * past the urgent marker. |
1045 | */ |
0ff9ea38 |
1046 | if (FD_ISSET(fd, &xset)) |
1047 | select_result(fd, 4); |
1048 | if (FD_ISSET(fd, &rset)) |
1049 | select_result(fd, 1); |
1050 | if (FD_ISSET(fd, &wset)) |
1051 | select_result(fd, 2); |
c5e438ec |
1052 | } |
1053 | |
5673d44e |
1054 | if (FD_ISSET(signalpipe[0], &rset)) { |
1055 | char c[1]; |
1056 | struct winsize size; |
ecb25722 |
1057 | if (read(signalpipe[0], c, 1) <= 0) |
1058 | /* ignore error */; |
1059 | /* ignore its value; it'll be `x' */ |
5673d44e |
1060 | if (ioctl(0, TIOCGWINSZ, (void *)&size) >= 0) |
1061 | back->size(backhandle, size.ws_col, size.ws_row); |
1062 | } |
1063 | |
21226fd7 |
1064 | if (FD_ISSET(STDIN_FILENO, &rset)) { |
c5e438ec |
1065 | char buf[4096]; |
1066 | int ret; |
1067 | |
6226c939 |
1068 | if (connopen && back->connected(backhandle)) { |
21226fd7 |
1069 | ret = read(STDIN_FILENO, buf, sizeof(buf)); |
c5e438ec |
1070 | if (ret < 0) { |
1071 | perror("stdin: read"); |
1072 | exit(1); |
1073 | } else if (ret == 0) { |
1074 | back->special(backhandle, TS_EOF); |
1075 | sending = FALSE; /* send nothing further after this */ |
1076 | } else { |
d0cb8c0c |
1077 | if (local_tty) |
1078 | from_tty(buf, ret); |
1079 | else |
1080 | back->send(backhandle, buf, ret); |
c5e438ec |
1081 | } |
1082 | } |
1083 | } |
1084 | |
21226fd7 |
1085 | if (FD_ISSET(STDOUT_FILENO, &wset)) { |
885f465f |
1086 | back->unthrottle(backhandle, try_output(FALSE)); |
c5e438ec |
1087 | } |
1088 | |
21226fd7 |
1089 | if (FD_ISSET(STDERR_FILENO, &wset)) { |
885f465f |
1090 | back->unthrottle(backhandle, try_output(TRUE)); |
c5e438ec |
1091 | } |
1092 | |
43a1c4a4 |
1093 | net_pending_errors(); |
1094 | |
6226c939 |
1095 | if ((!connopen || !back->connected(backhandle)) && |
c5e438ec |
1096 | bufchain_size(&stdout_data) == 0 && |
1097 | bufchain_size(&stderr_data) == 0) |
1098 | break; /* we closed the connection */ |
1099 | } |
1100 | exitcode = back->exitcode(backhandle); |
1101 | if (exitcode < 0) { |
1102 | fprintf(stderr, "Remote process exit code unavailable\n"); |
1103 | exitcode = 1; /* this is an error condition */ |
1104 | } |
d9c40fd6 |
1105 | cleanup_exit(exitcode); |
1106 | return exitcode; /* shouldn't happen, but placates gcc */ |
c5e438ec |
1107 | } |