12dc4ec0 |
1 | /* |
2 | * PLink - a command-line (stdin/stdout) variant of PuTTY. |
3 | */ |
4 | |
4d331a77 |
5 | #ifndef AUTO_WINSOCK |
12dc4ec0 |
6 | #include <winsock2.h> |
4d331a77 |
7 | #endif |
12dc4ec0 |
8 | #include <windows.h> |
9 | #include <stdio.h> |
49bad831 |
10 | #include <stdlib.h> |
12dc4ec0 |
11 | #include <stdarg.h> |
12 | |
32874aea |
13 | #define PUTTY_DO_GLOBALS /* actually _define_ globals */ |
12dc4ec0 |
14 | #include "putty.h" |
a9422f39 |
15 | #include "storage.h" |
8df7a775 |
16 | #include "tree234.h" |
12dc4ec0 |
17 | |
5471d09a |
18 | #define MAX_STDIN_BACKLOG 4096 |
19 | |
32874aea |
20 | void fatalbox(char *p, ...) |
21 | { |
12dc4ec0 |
22 | va_list ap; |
49bad831 |
23 | fprintf(stderr, "FATAL ERROR: "); |
12dc4ec0 |
24 | va_start(ap, p); |
25 | vfprintf(stderr, p, ap); |
26 | va_end(ap); |
27 | fputc('\n', stderr); |
28 | WSACleanup(); |
29 | exit(1); |
30 | } |
32874aea |
31 | void connection_fatal(char *p, ...) |
32 | { |
8d5de777 |
33 | va_list ap; |
49bad831 |
34 | fprintf(stderr, "FATAL ERROR: "); |
8d5de777 |
35 | va_start(ap, p); |
36 | vfprintf(stderr, p, ap); |
37 | va_end(ap); |
38 | fputc('\n', stderr); |
39 | WSACleanup(); |
40 | exit(1); |
41 | } |
12dc4ec0 |
42 | |
d8426c54 |
43 | static char *password = NULL; |
44 | |
32874aea |
45 | void logevent(char *string) |
46 | { |
47 | } |
a9422f39 |
48 | |
49 | void verify_ssh_host_key(char *host, int port, char *keytype, |
32874aea |
50 | char *keystr, char *fingerprint) |
51 | { |
a9422f39 |
52 | int ret; |
fcbb94d3 |
53 | HANDLE hin; |
54 | DWORD savemode, i; |
a9422f39 |
55 | |
56 | static const char absentmsg[] = |
32874aea |
57 | "The server's host key is not cached in the registry. You\n" |
58 | "have no guarantee that the server is the computer you\n" |
59 | "think it is.\n" |
60 | "The server's key fingerprint is:\n" |
61 | "%s\n" |
62 | "If you trust this host, enter \"y\" to add the key to\n" |
63 | "PuTTY's cache and carry on connecting.\n" |
d0718310 |
64 | "If you want to carry on connecting just once, without\n" |
65 | "adding the key to the cache, enter \"n\".\n" |
66 | "If you do not trust this host, press Return to abandon the\n" |
67 | "connection.\n" |
68 | "Store key in cache? (y/n) "; |
a9422f39 |
69 | |
70 | static const char wrongmsg[] = |
32874aea |
71 | "WARNING - POTENTIAL SECURITY BREACH!\n" |
72 | "The server's host key does not match the one PuTTY has\n" |
73 | "cached in the registry. This means that either the\n" |
74 | "server administrator has changed the host key, or you\n" |
75 | "have actually connected to another computer pretending\n" |
76 | "to be the server.\n" |
77 | "The new key fingerprint is:\n" |
78 | "%s\n" |
79 | "If you were expecting this change and trust the new key,\n" |
80 | "enter \"y\" to update PuTTY's cache and continue connecting.\n" |
81 | "If you want to carry on connecting but without updating\n" |
82 | "the cache, enter \"n\".\n" |
83 | "If you want to abandon the connection completely, press\n" |
84 | "Return to cancel. Pressing Return is the ONLY guaranteed\n" |
85 | "safe choice.\n" |
86 | "Update cached key? (y/n, Return cancels connection) "; |
a9422f39 |
87 | |
88 | static const char abandoned[] = "Connection abandoned.\n"; |
89 | |
90 | char line[32]; |
91 | |
92 | /* |
93 | * Verify the key against the registry. |
94 | */ |
95 | ret = verify_host_key(host, port, keytype, keystr); |
96 | |
32874aea |
97 | if (ret == 0) /* success - key matched OK */ |
98 | return; |
fcbb94d3 |
99 | |
b4453f49 |
100 | if (ret == 2) { /* key was different */ |
32874aea |
101 | fprintf(stderr, wrongmsg, fingerprint); |
b4453f49 |
102 | fflush(stderr); |
103 | } |
104 | if (ret == 1) { /* key was absent */ |
32874aea |
105 | fprintf(stderr, absentmsg, fingerprint); |
b4453f49 |
106 | fflush(stderr); |
107 | } |
fcbb94d3 |
108 | |
109 | hin = GetStdHandle(STD_INPUT_HANDLE); |
110 | GetConsoleMode(hin, &savemode); |
111 | SetConsoleMode(hin, (savemode | ENABLE_ECHO_INPUT | |
32874aea |
112 | ENABLE_PROCESSED_INPUT | ENABLE_LINE_INPUT)); |
113 | ReadFile(hin, line, sizeof(line) - 1, &i, NULL); |
fcbb94d3 |
114 | SetConsoleMode(hin, savemode); |
115 | |
d0718310 |
116 | if (line[0] != '\0' && line[0] != '\r' && line[0] != '\n') { |
32874aea |
117 | if (line[0] == 'y' || line[0] == 'Y') |
118 | store_host_key(host, port, keytype, keystr); |
d0718310 |
119 | } else { |
120 | fprintf(stderr, abandoned); |
121 | exit(0); |
a9422f39 |
122 | } |
123 | } |
989b10e9 |
124 | |
ca20bfcf |
125 | /* |
126 | * Ask whether the selected cipher is acceptable (since it was |
127 | * below the configured 'warn' threshold). |
128 | * cs: 0 = both ways, 1 = client->server, 2 = server->client |
129 | */ |
130 | void askcipher(char *ciphername, int cs) |
131 | { |
132 | HANDLE hin; |
133 | DWORD savemode, i; |
134 | |
135 | static const char msg[] = |
136 | "The first %scipher supported by the server is\n" |
137 | "%s, which is below the configured warning threshold.\n" |
138 | "Continue with connection? (y/n) "; |
139 | static const char abandoned[] = "Connection abandoned.\n"; |
140 | |
141 | char line[32]; |
142 | |
143 | fprintf(stderr, msg, |
144 | (cs == 0) ? "" : |
145 | (cs == 1) ? "client-to-server " : |
146 | "server-to-client ", |
147 | ciphername); |
148 | fflush(stderr); |
149 | |
150 | hin = GetStdHandle(STD_INPUT_HANDLE); |
151 | GetConsoleMode(hin, &savemode); |
152 | SetConsoleMode(hin, (savemode | ENABLE_ECHO_INPUT | |
153 | ENABLE_PROCESSED_INPUT | ENABLE_LINE_INPUT)); |
154 | ReadFile(hin, line, sizeof(line) - 1, &i, NULL); |
155 | SetConsoleMode(hin, savemode); |
156 | |
157 | if (line[0] == 'y' || line[0] == 'Y') { |
158 | return; |
159 | } else { |
160 | fprintf(stderr, abandoned); |
161 | exit(0); |
162 | } |
163 | } |
164 | |
7bedb13c |
165 | /* |
166 | * Warn about the obsolescent key file format. |
167 | */ |
168 | void old_keyfile_warning(void) |
169 | { |
170 | static const char message[] = |
171 | "You are loading an SSH 2 private key which has an\n" |
172 | "old version of the file format. This means your key\n" |
173 | "file is not fully tamperproof. Future versions of\n" |
174 | "PuTTY may stop supporting this private key format,\n" |
175 | "so we recommend you convert your key to the new\n" |
176 | "format.\n" |
177 | "\n" |
178 | "Once the key is loaded into PuTTYgen, you can perform\n" |
179 | "this conversion simply by saving it again.\n"; |
180 | |
181 | fputs(message, stderr); |
182 | } |
183 | |
0965bee0 |
184 | HANDLE inhandle, outhandle, errhandle; |
6f34e365 |
185 | DWORD orig_console_mode; |
186 | |
8df7a775 |
187 | WSAEVENT netevent; |
188 | |
32874aea |
189 | int term_ldisc(int mode) |
190 | { |
191 | return FALSE; |
192 | } |
193 | void ldisc_update(int echo, int edit) |
194 | { |
0965bee0 |
195 | /* Update stdin read mode to reflect changes in line discipline. */ |
196 | DWORD mode; |
197 | |
198 | mode = ENABLE_PROCESSED_INPUT; |
199 | if (echo) |
32874aea |
200 | mode = mode | ENABLE_ECHO_INPUT; |
0965bee0 |
201 | else |
32874aea |
202 | mode = mode & ~ENABLE_ECHO_INPUT; |
0965bee0 |
203 | if (edit) |
32874aea |
204 | mode = mode | ENABLE_LINE_INPUT; |
0965bee0 |
205 | else |
32874aea |
206 | mode = mode & ~ENABLE_LINE_INPUT; |
0965bee0 |
207 | SetConsoleMode(inhandle, mode); |
208 | } |
209 | |
fa17a66e |
210 | static int get_line(const char *prompt, char *str, int maxlen, int is_pw) |
67779be7 |
211 | { |
212 | HANDLE hin, hout; |
fa17a66e |
213 | DWORD savemode, newmode, i; |
67779be7 |
214 | |
fa17a66e |
215 | if (is_pw && password) { |
32874aea |
216 | static int tried_once = 0; |
217 | |
218 | if (tried_once) { |
219 | return 0; |
220 | } else { |
221 | strncpy(str, password, maxlen); |
222 | str[maxlen - 1] = '\0'; |
223 | tried_once = 1; |
224 | return 1; |
225 | } |
67779be7 |
226 | } |
67779be7 |
227 | |
228 | hin = GetStdHandle(STD_INPUT_HANDLE); |
229 | hout = GetStdHandle(STD_OUTPUT_HANDLE); |
230 | if (hin == INVALID_HANDLE_VALUE || hout == INVALID_HANDLE_VALUE) { |
32874aea |
231 | fprintf(stderr, "Cannot get standard input/output handles"); |
232 | return 0; |
67779be7 |
233 | } |
234 | |
235 | GetConsoleMode(hin, &savemode); |
fa17a66e |
236 | newmode = savemode | ENABLE_PROCESSED_INPUT | ENABLE_LINE_INPUT; |
237 | if (is_pw) |
32874aea |
238 | newmode &= ~ENABLE_ECHO_INPUT; |
fa17a66e |
239 | else |
32874aea |
240 | newmode |= ENABLE_ECHO_INPUT; |
fa17a66e |
241 | SetConsoleMode(hin, newmode); |
67779be7 |
242 | |
243 | WriteFile(hout, prompt, strlen(prompt), &i, NULL); |
32874aea |
244 | ReadFile(hin, str, maxlen - 1, &i, NULL); |
67779be7 |
245 | |
246 | SetConsoleMode(hin, savemode); |
247 | |
32874aea |
248 | if ((int) i > maxlen) |
249 | i = maxlen - 1; |
250 | else |
251 | i = i - 2; |
67779be7 |
252 | str[i] = '\0'; |
253 | |
fa17a66e |
254 | if (is_pw) |
32874aea |
255 | WriteFile(hout, "\r\n", 2, &i, NULL); |
67779be7 |
256 | |
257 | return 1; |
258 | } |
259 | |
5471d09a |
260 | struct input_data { |
261 | DWORD len; |
262 | char buffer[4096]; |
263 | HANDLE event, eventback; |
264 | }; |
265 | |
32874aea |
266 | static DWORD WINAPI stdin_read_thread(void *param) |
267 | { |
268 | struct input_data *idata = (struct input_data *) param; |
12dc4ec0 |
269 | HANDLE inhandle; |
270 | |
271 | inhandle = GetStdHandle(STD_INPUT_HANDLE); |
272 | |
273 | while (ReadFile(inhandle, idata->buffer, sizeof(idata->buffer), |
32874aea |
274 | &idata->len, NULL) && idata->len > 0) { |
275 | SetEvent(idata->event); |
276 | WaitForSingleObject(idata->eventback, INFINITE); |
12dc4ec0 |
277 | } |
278 | |
279 | idata->len = 0; |
280 | SetEvent(idata->event); |
281 | |
282 | return 0; |
283 | } |
284 | |
5471d09a |
285 | struct output_data { |
286 | DWORD len, lenwritten; |
287 | int writeret; |
288 | char *buffer; |
289 | int is_stderr, done; |
290 | HANDLE event, eventback; |
291 | int busy; |
292 | }; |
293 | |
294 | static DWORD WINAPI stdout_write_thread(void *param) |
295 | { |
296 | struct output_data *odata = (struct output_data *) param; |
297 | HANDLE outhandle, errhandle; |
298 | |
299 | outhandle = GetStdHandle(STD_OUTPUT_HANDLE); |
300 | errhandle = GetStdHandle(STD_ERROR_HANDLE); |
301 | |
302 | while (1) { |
303 | WaitForSingleObject(odata->eventback, INFINITE); |
304 | if (odata->done) |
305 | break; |
306 | odata->writeret = |
307 | WriteFile(odata->is_stderr ? errhandle : outhandle, |
308 | odata->buffer, odata->len, &odata->lenwritten, NULL); |
309 | SetEvent(odata->event); |
310 | } |
311 | |
312 | return 0; |
313 | } |
314 | |
315 | bufchain stdout_data, stderr_data; |
316 | struct output_data odata, edata; |
317 | |
318 | void try_output(int is_stderr) |
319 | { |
320 | struct output_data *data = (is_stderr ? &edata : &odata); |
321 | void *senddata; |
322 | int sendlen; |
323 | |
324 | if (!data->busy) { |
325 | bufchain_prefix(is_stderr ? &stderr_data : &stdout_data, |
326 | &senddata, &sendlen); |
327 | data->buffer = senddata; |
328 | data->len = sendlen; |
329 | SetEvent(data->eventback); |
330 | data->busy = 1; |
331 | } |
332 | } |
333 | |
334 | int from_backend(int is_stderr, char *data, int len) |
335 | { |
5471d09a |
336 | HANDLE h = (is_stderr ? errhandle : outhandle); |
5471d09a |
337 | int osize, esize; |
338 | |
339 | if (is_stderr) { |
340 | bufchain_add(&stderr_data, data, len); |
341 | try_output(1); |
342 | } else { |
343 | bufchain_add(&stdout_data, data, len); |
344 | try_output(0); |
345 | } |
346 | |
347 | osize = bufchain_size(&stdout_data); |
348 | esize = bufchain_size(&stderr_data); |
349 | |
350 | return osize + esize; |
351 | } |
352 | |
d8426c54 |
353 | /* |
354 | * Short description of parameters. |
355 | */ |
356 | static void usage(void) |
357 | { |
358 | printf("PuTTY Link: command-line connection utility\n"); |
359 | printf("%s\n", ver); |
360 | printf("Usage: plink [options] [user@]host [command]\n"); |
e672967c |
361 | printf(" (\"host\" can also be a PuTTY saved session name)\n"); |
d8426c54 |
362 | printf("Options:\n"); |
363 | printf(" -v show verbose messages\n"); |
364 | printf(" -ssh force use of ssh protocol\n"); |
365 | printf(" -P port connect to specified port\n"); |
366 | printf(" -pw passw login with specified password\n"); |
96621a84 |
367 | printf(" -m file read remote command(s) from file\n"); |
e7aabca4 |
368 | printf(" -L listen-port:host:port Forward local port to " |
369 | "remote address\n"); |
370 | printf(" -R listen-port:host:port Forward remote port to" |
371 | " local address\n"); |
d8426c54 |
372 | exit(1); |
373 | } |
374 | |
32874aea |
375 | char *do_select(SOCKET skt, int startup) |
376 | { |
8df7a775 |
377 | int events; |
378 | if (startup) { |
3ad9d396 |
379 | events = (FD_CONNECT | FD_READ | FD_WRITE | |
380 | FD_OOB | FD_CLOSE | FD_ACCEPT); |
8df7a775 |
381 | } else { |
382 | events = 0; |
383 | } |
32874aea |
384 | if (WSAEventSelect(skt, netevent, events) == SOCKET_ERROR) { |
385 | switch (WSAGetLastError()) { |
386 | case WSAENETDOWN: |
387 | return "Network is down"; |
388 | default: |
389 | return "WSAAsyncSelect(): unknown error"; |
390 | } |
8df7a775 |
391 | } |
392 | return NULL; |
393 | } |
394 | |
32874aea |
395 | int main(int argc, char **argv) |
396 | { |
12dc4ec0 |
397 | WSADATA wsadata; |
398 | WORD winsock_ver; |
5471d09a |
399 | WSAEVENT stdinevent, stdoutevent, stderrevent; |
400 | HANDLE handles[4]; |
401 | DWORD in_threadid, out_threadid, err_threadid; |
12dc4ec0 |
402 | struct input_data idata; |
5471d09a |
403 | int reading; |
12dc4ec0 |
404 | int sending; |
d8426c54 |
405 | int portnumber = -1; |
8df7a775 |
406 | SOCKET *sklist; |
407 | int skcount, sksize; |
408 | int connopen; |
e7aabca4 |
409 | char extra_portfwd[sizeof(cfg.portfwd)]; |
12dc4ec0 |
410 | |
fa17a66e |
411 | ssh_get_line = get_line; |
67779be7 |
412 | |
32874aea |
413 | sklist = NULL; |
414 | skcount = sksize = 0; |
c9bdcd96 |
415 | /* |
416 | * Initialise port and protocol to sensible defaults. (These |
417 | * will be overridden by more or less anything.) |
418 | */ |
419 | default_protocol = PROT_SSH; |
420 | default_port = 22; |
8df7a775 |
421 | |
67779be7 |
422 | flags = FLAG_STDERR; |
12dc4ec0 |
423 | /* |
424 | * Process the command line. |
425 | */ |
a9422f39 |
426 | do_defaults(NULL, &cfg); |
e7a7383f |
427 | default_protocol = cfg.protocol; |
428 | default_port = cfg.port; |
8cb9c947 |
429 | { |
32874aea |
430 | /* |
431 | * Override the default protocol if PLINK_PROTOCOL is set. |
432 | */ |
433 | char *p = getenv("PLINK_PROTOCOL"); |
434 | int i; |
435 | if (p) { |
436 | for (i = 0; backends[i].backend != NULL; i++) { |
437 | if (!strcmp(backends[i].name, p)) { |
438 | default_protocol = cfg.protocol = backends[i].protocol; |
439 | default_port = cfg.port = |
440 | backends[i].backend->default_port; |
441 | break; |
442 | } |
443 | } |
444 | } |
8cb9c947 |
445 | } |
12dc4ec0 |
446 | while (--argc) { |
32874aea |
447 | char *p = *++argv; |
448 | if (*p == '-') { |
449 | if (!strcmp(p, "-ssh")) { |
12dc4ec0 |
450 | default_protocol = cfg.protocol = PROT_SSH; |
451 | default_port = cfg.port = 22; |
32874aea |
452 | } else if (!strcmp(p, "-telnet")) { |
9d33ebdd |
453 | default_protocol = cfg.protocol = PROT_TELNET; |
454 | default_port = cfg.port = 23; |
66a3d938 |
455 | } else if (!strcmp(p, "-rlogin")) { |
456 | default_protocol = cfg.protocol = PROT_RLOGIN; |
457 | default_port = cfg.port = 513; |
32874aea |
458 | } else if (!strcmp(p, "-raw")) { |
9d33ebdd |
459 | default_protocol = cfg.protocol = PROT_RAW; |
67779be7 |
460 | } else if (!strcmp(p, "-v")) { |
32874aea |
461 | flags |= FLAG_VERBOSE; |
12dc4ec0 |
462 | } else if (!strcmp(p, "-log")) { |
32874aea |
463 | logfile = "putty.log"; |
464 | } else if (!strcmp(p, "-pw") && argc > 1) { |
465 | --argc, password = *++argv; |
466 | } else if (!strcmp(p, "-l") && argc > 1) { |
467 | char *username; |
468 | --argc, username = *++argv; |
469 | strncpy(cfg.username, username, sizeof(cfg.username)); |
470 | cfg.username[sizeof(cfg.username) - 1] = '\0'; |
e7aabca4 |
471 | } else if ((!strcmp(p, "-L") || !strcmp(p, "-R")) && argc > 1) { |
41ff4658 |
472 | char *fwd, *ptr, *q; |
e7aabca4 |
473 | int i=0; |
474 | --argc, fwd = *++argv; |
475 | ptr = extra_portfwd; |
476 | /* if multiple forwards, find end of list */ |
477 | if (ptr[0]=='R' || ptr[0]=='L') { |
478 | for (i = 0; i < sizeof(extra_portfwd) - 2; i++) |
479 | if (ptr[i]=='\000' && ptr[i+1]=='\000') |
480 | break; |
481 | ptr = ptr + i + 1; /* point to next forward slot */ |
482 | } |
483 | ptr[0] = p[1]; /* insert a 'L' or 'R' at the start */ |
484 | strncpy(ptr+1, fwd, sizeof(extra_portfwd) - i); |
41ff4658 |
485 | q = strchr(ptr, ':'); |
486 | if (q) *q = '\t'; /* replace first : with \t */ |
e7aabca4 |
487 | ptr[strlen(ptr)+1] = '\000'; /* append two '\000' */ |
488 | extra_portfwd[sizeof(extra_portfwd) - 1] = '\0'; |
32874aea |
489 | } else if (!strcmp(p, "-m") && argc > 1) { |
490 | char *filename, *command; |
491 | int cmdlen, cmdsize; |
492 | FILE *fp; |
493 | int c, d; |
494 | |
495 | --argc, filename = *++argv; |
496 | |
497 | cmdlen = cmdsize = 0; |
498 | command = NULL; |
499 | fp = fopen(filename, "r"); |
500 | if (!fp) { |
501 | fprintf(stderr, "plink: unable to open command " |
502 | "file \"%s\"\n", filename); |
503 | return 1; |
504 | } |
505 | do { |
506 | c = fgetc(fp); |
507 | d = c; |
508 | if (c == EOF) |
509 | d = 0; |
510 | if (cmdlen >= cmdsize) { |
511 | cmdsize = cmdlen + 512; |
512 | command = srealloc(command, cmdsize); |
513 | } |
514 | command[cmdlen++] = d; |
515 | } while (c != EOF); |
516 | cfg.remote_cmd_ptr = command; |
fd5e5847 |
517 | cfg.remote_cmd_ptr2 = NULL; |
32874aea |
518 | cfg.nopty = TRUE; /* command => no terminal */ |
519 | } else if (!strcmp(p, "-P") && argc > 1) { |
520 | --argc, portnumber = atoi(*++argv); |
521 | } |
12dc4ec0 |
522 | } else if (*p) { |
32874aea |
523 | if (!*cfg.host) { |
524 | char *q = p; |
525 | /* |
526 | * If the hostname starts with "telnet:", set the |
527 | * protocol to Telnet and process the string as a |
528 | * Telnet URL. |
529 | */ |
530 | if (!strncmp(q, "telnet:", 7)) { |
531 | char c; |
532 | |
533 | q += 7; |
534 | if (q[0] == '/' && q[1] == '/') |
535 | q += 2; |
536 | cfg.protocol = PROT_TELNET; |
537 | p = q; |
538 | while (*p && *p != ':' && *p != '/') |
539 | p++; |
540 | c = *p; |
541 | if (*p) |
542 | *p++ = '\0'; |
543 | if (c == ':') |
544 | cfg.port = atoi(p); |
545 | else |
546 | cfg.port = -1; |
547 | strncpy(cfg.host, q, sizeof(cfg.host) - 1); |
548 | cfg.host[sizeof(cfg.host) - 1] = '\0'; |
549 | } else { |
550 | char *r; |
551 | /* |
552 | * Before we process the [user@]host string, we |
553 | * first check for the presence of a protocol |
554 | * prefix (a protocol name followed by ","). |
555 | */ |
556 | r = strchr(p, ','); |
557 | if (r) { |
558 | int i, j; |
559 | for (i = 0; backends[i].backend != NULL; i++) { |
560 | j = strlen(backends[i].name); |
561 | if (j == r - p && |
562 | !memcmp(backends[i].name, p, j)) { |
563 | default_protocol = cfg.protocol = |
564 | backends[i].protocol; |
565 | portnumber = |
566 | backends[i].backend->default_port; |
567 | p = r + 1; |
568 | break; |
569 | } |
570 | } |
571 | } |
572 | |
573 | /* |
574 | * Three cases. Either (a) there's a nonzero |
575 | * length string followed by an @, in which |
576 | * case that's user and the remainder is host. |
577 | * Or (b) there's only one string, not counting |
578 | * a potential initial @, and it exists in the |
579 | * saved-sessions database. Or (c) only one |
580 | * string and it _doesn't_ exist in the |
581 | * database. |
582 | */ |
583 | r = strrchr(p, '@'); |
584 | if (r == p) |
585 | p++, r = NULL; /* discount initial @ */ |
586 | if (r == NULL) { |
587 | /* |
588 | * One string. |
589 | */ |
590 | Config cfg2; |
591 | do_defaults(p, &cfg2); |
592 | if (cfg2.host[0] == '\0') { |
593 | /* No settings for this host; use defaults */ |
594 | strncpy(cfg.host, p, sizeof(cfg.host) - 1); |
595 | cfg.host[sizeof(cfg.host) - 1] = '\0'; |
596 | cfg.port = default_port; |
597 | } else { |
598 | cfg = cfg2; |
599 | cfg.remote_cmd_ptr = cfg.remote_cmd; |
600 | } |
601 | } else { |
602 | *r++ = '\0'; |
603 | strncpy(cfg.username, p, sizeof(cfg.username) - 1); |
604 | cfg.username[sizeof(cfg.username) - 1] = '\0'; |
605 | strncpy(cfg.host, r, sizeof(cfg.host) - 1); |
606 | cfg.host[sizeof(cfg.host) - 1] = '\0'; |
607 | cfg.port = default_port; |
608 | } |
609 | } |
610 | } else { |
611 | int len = sizeof(cfg.remote_cmd) - 1; |
612 | char *cp = cfg.remote_cmd; |
613 | int len2; |
614 | |
615 | strncpy(cp, p, len); |
616 | cp[len] = '\0'; |
617 | len2 = strlen(cp); |
618 | len -= len2; |
619 | cp += len2; |
620 | while (--argc) { |
621 | if (len > 0) |
622 | len--, *cp++ = ' '; |
623 | strncpy(cp, *++argv, len); |
624 | cp[len] = '\0'; |
625 | len2 = strlen(cp); |
626 | len -= len2; |
627 | cp += len2; |
628 | } |
629 | cfg.nopty = TRUE; /* command => no terminal */ |
630 | break; /* done with cmdline */ |
631 | } |
12dc4ec0 |
632 | } |
633 | } |
634 | |
d8426c54 |
635 | if (!*cfg.host) { |
32874aea |
636 | usage(); |
d8426c54 |
637 | } |
d8426c54 |
638 | |
449925a6 |
639 | /* |
640 | * Trim leading whitespace off the hostname if it's there. |
641 | */ |
642 | { |
643 | int space = strspn(cfg.host, " \t"); |
644 | memmove(cfg.host, cfg.host+space, 1+strlen(cfg.host)-space); |
645 | } |
646 | |
647 | /* See if host is of the form user@host */ |
648 | if (cfg.host[0] != '\0') { |
649 | char *atsign = strchr(cfg.host, '@'); |
650 | /* Make sure we're not overflowing the user field */ |
651 | if (atsign) { |
652 | if (atsign - cfg.host < sizeof cfg.username) { |
653 | strncpy(cfg.username, cfg.host, atsign - cfg.host); |
654 | cfg.username[atsign - cfg.host] = '\0'; |
655 | } |
656 | memmove(cfg.host, atsign + 1, 1 + strlen(atsign + 1)); |
657 | } |
658 | } |
659 | |
660 | /* |
661 | * Trim a colon suffix off the hostname if it's there. |
662 | */ |
663 | cfg.host[strcspn(cfg.host, ":")] = '\0'; |
664 | |
96621a84 |
665 | if (!*cfg.remote_cmd_ptr) |
32874aea |
666 | flags |= FLAG_INTERACTIVE; |
67779be7 |
667 | |
12dc4ec0 |
668 | /* |
669 | * Select protocol. This is farmed out into a table in a |
670 | * separate file to enable an ssh-free variant. |
671 | */ |
672 | { |
32874aea |
673 | int i; |
674 | back = NULL; |
675 | for (i = 0; backends[i].backend != NULL; i++) |
676 | if (backends[i].protocol == cfg.protocol) { |
677 | back = backends[i].backend; |
678 | break; |
679 | } |
680 | if (back == NULL) { |
681 | fprintf(stderr, |
682 | "Internal fault: Unsupported protocol found\n"); |
683 | return 1; |
684 | } |
12dc4ec0 |
685 | } |
686 | |
687 | /* |
e7aabca4 |
688 | * Add extra port forwardings (accumulated on command line) to |
689 | * cfg. |
690 | */ |
691 | { |
692 | int i; |
693 | char *p; |
694 | p = extra_portfwd; |
695 | i = 0; |
696 | while (cfg.portfwd[i]) |
697 | i += strlen(cfg.portfwd+i) + 1; |
698 | while (*p) { |
699 | if (strlen(p)+2 > sizeof(cfg.portfwd)-i) { |
700 | fprintf(stderr, "Internal fault: not enough space for all" |
701 | " port forwardings\n"); |
702 | break; |
703 | } |
704 | strncpy(cfg.portfwd+i, p, sizeof(cfg.portfwd)-i-1); |
705 | i += strlen(cfg.portfwd+i) + 1; |
706 | cfg.portfwd[i] = '\0'; |
707 | p += strlen(p)+1; |
708 | } |
709 | } |
710 | |
711 | /* |
8cb9c947 |
712 | * Select port. |
713 | */ |
714 | if (portnumber != -1) |
32874aea |
715 | cfg.port = portnumber; |
8cb9c947 |
716 | |
717 | /* |
12dc4ec0 |
718 | * Initialise WinSock. |
719 | */ |
720 | winsock_ver = MAKEWORD(2, 0); |
721 | if (WSAStartup(winsock_ver, &wsadata)) { |
722 | MessageBox(NULL, "Unable to initialise WinSock", "WinSock Error", |
723 | MB_OK | MB_ICONEXCLAMATION); |
724 | return 1; |
725 | } |
726 | if (LOBYTE(wsadata.wVersion) != 2 || HIBYTE(wsadata.wVersion) != 0) { |
727 | MessageBox(NULL, "WinSock version is incompatible with 2.0", |
728 | "WinSock Error", MB_OK | MB_ICONEXCLAMATION); |
729 | WSACleanup(); |
730 | return 1; |
731 | } |
8df7a775 |
732 | sk_init(); |
12dc4ec0 |
733 | |
734 | /* |
735 | * Start up the connection. |
736 | */ |
8df7a775 |
737 | netevent = CreateEvent(NULL, FALSE, FALSE, NULL); |
12dc4ec0 |
738 | { |
739 | char *error; |
740 | char *realhost; |
2184a5d9 |
741 | /* nodelay is only useful if stdin is a character device (console) */ |
742 | int nodelay = cfg.tcp_nodelay && |
743 | (GetFileType(GetStdHandle(STD_INPUT_HANDLE)) == FILE_TYPE_CHAR); |
12dc4ec0 |
744 | |
2184a5d9 |
745 | error = back->init(cfg.host, cfg.port, &realhost, nodelay); |
12dc4ec0 |
746 | if (error) { |
747 | fprintf(stderr, "Unable to open connection:\n%s", error); |
748 | return 1; |
749 | } |
6e1ebb76 |
750 | sfree(realhost); |
12dc4ec0 |
751 | } |
8df7a775 |
752 | connopen = 1; |
12dc4ec0 |
753 | |
12dc4ec0 |
754 | stdinevent = CreateEvent(NULL, FALSE, FALSE, NULL); |
5471d09a |
755 | stdoutevent = CreateEvent(NULL, FALSE, FALSE, NULL); |
756 | stderrevent = CreateEvent(NULL, FALSE, FALSE, NULL); |
12dc4ec0 |
757 | |
0965bee0 |
758 | inhandle = GetStdHandle(STD_INPUT_HANDLE); |
12dc4ec0 |
759 | outhandle = GetStdHandle(STD_OUTPUT_HANDLE); |
fe50e814 |
760 | errhandle = GetStdHandle(STD_ERROR_HANDLE); |
0965bee0 |
761 | GetConsoleMode(inhandle, &orig_console_mode); |
762 | SetConsoleMode(inhandle, ENABLE_PROCESSED_INPUT); |
12dc4ec0 |
763 | |
764 | /* |
12dc4ec0 |
765 | * Turn off ECHO and LINE input modes. We don't care if this |
766 | * call fails, because we know we aren't necessarily running in |
767 | * a console. |
768 | */ |
12dc4ec0 |
769 | handles[0] = netevent; |
770 | handles[1] = stdinevent; |
5471d09a |
771 | handles[2] = stdoutevent; |
772 | handles[3] = stderrevent; |
12dc4ec0 |
773 | sending = FALSE; |
5471d09a |
774 | |
775 | /* |
776 | * Create spare threads to write to stdout and stderr, so we |
777 | * can arrange asynchronous writes. |
778 | */ |
779 | odata.event = stdoutevent; |
780 | odata.eventback = CreateEvent(NULL, FALSE, FALSE, NULL); |
781 | odata.is_stderr = 0; |
782 | odata.busy = odata.done = 0; |
783 | if (!CreateThread(NULL, 0, stdout_write_thread, |
784 | &odata, 0, &out_threadid)) { |
785 | fprintf(stderr, "Unable to create output thread\n"); |
786 | exit(1); |
787 | } |
788 | edata.event = stderrevent; |
789 | edata.eventback = CreateEvent(NULL, FALSE, FALSE, NULL); |
790 | edata.is_stderr = 1; |
791 | edata.busy = edata.done = 0; |
792 | if (!CreateThread(NULL, 0, stdout_write_thread, |
793 | &edata, 0, &err_threadid)) { |
794 | fprintf(stderr, "Unable to create error output thread\n"); |
795 | exit(1); |
796 | } |
797 | |
12dc4ec0 |
798 | while (1) { |
32874aea |
799 | int n; |
800 | |
801 | if (!sending && back->sendok()) { |
802 | /* |
803 | * Create a separate thread to read from stdin. This is |
804 | * a total pain, but I can't find another way to do it: |
805 | * |
806 | * - an overlapped ReadFile or ReadFileEx just doesn't |
807 | * happen; we get failure from ReadFileEx, and |
808 | * ReadFile blocks despite being given an OVERLAPPED |
809 | * structure. Perhaps we can't do overlapped reads |
810 | * on consoles. WHY THE HELL NOT? |
811 | * |
812 | * - WaitForMultipleObjects(netevent, console) doesn't |
813 | * work, because it signals the console when |
814 | * _anything_ happens, including mouse motions and |
815 | * other things that don't cause data to be readable |
816 | * - so we're back to ReadFile blocking. |
817 | */ |
818 | idata.event = stdinevent; |
819 | idata.eventback = CreateEvent(NULL, FALSE, FALSE, NULL); |
820 | if (!CreateThread(NULL, 0, stdin_read_thread, |
5471d09a |
821 | &idata, 0, &in_threadid)) { |
822 | fprintf(stderr, "Unable to create input thread\n"); |
32874aea |
823 | exit(1); |
824 | } |
825 | sending = TRUE; |
826 | } |
827 | |
5471d09a |
828 | n = WaitForMultipleObjects(4, handles, FALSE, INFINITE); |
32874aea |
829 | if (n == 0) { |
830 | WSANETWORKEVENTS things; |
8df7a775 |
831 | SOCKET socket; |
d2371c81 |
832 | extern SOCKET first_socket(int *), next_socket(int *); |
8df7a775 |
833 | extern int select_result(WPARAM, LPARAM); |
32874aea |
834 | int i, socketstate; |
835 | |
836 | /* |
837 | * We must not call select_result() for any socket |
838 | * until we have finished enumerating within the tree. |
839 | * This is because select_result() may close the socket |
840 | * and modify the tree. |
841 | */ |
842 | /* Count the active sockets. */ |
843 | i = 0; |
844 | for (socket = first_socket(&socketstate); |
845 | socket != INVALID_SOCKET; |
846 | socket = next_socket(&socketstate)) i++; |
847 | |
848 | /* Expand the buffer if necessary. */ |
849 | if (i > sksize) { |
850 | sksize = i + 16; |
851 | sklist = srealloc(sklist, sksize * sizeof(*sklist)); |
852 | } |
853 | |
854 | /* Retrieve the sockets into sklist. */ |
855 | skcount = 0; |
856 | for (socket = first_socket(&socketstate); |
857 | socket != INVALID_SOCKET; |
d2371c81 |
858 | socket = next_socket(&socketstate)) { |
32874aea |
859 | sklist[skcount++] = socket; |
860 | } |
861 | |
862 | /* Now we're done enumerating; go through the list. */ |
863 | for (i = 0; i < skcount; i++) { |
864 | WPARAM wp; |
865 | socket = sklist[i]; |
866 | wp = (WPARAM) socket; |
ffb959c7 |
867 | if (!WSAEnumNetworkEvents(socket, NULL, &things)) { |
32874aea |
868 | noise_ultralight(socket); |
869 | noise_ultralight(things.lNetworkEvents); |
3ad9d396 |
870 | if (things.lNetworkEvents & FD_CONNECT) |
871 | connopen &= select_result(wp, (LPARAM) FD_CONNECT); |
8df7a775 |
872 | if (things.lNetworkEvents & FD_READ) |
32874aea |
873 | connopen &= select_result(wp, (LPARAM) FD_READ); |
8df7a775 |
874 | if (things.lNetworkEvents & FD_CLOSE) |
32874aea |
875 | connopen &= select_result(wp, (LPARAM) FD_CLOSE); |
8df7a775 |
876 | if (things.lNetworkEvents & FD_OOB) |
32874aea |
877 | connopen &= select_result(wp, (LPARAM) FD_OOB); |
8df7a775 |
878 | if (things.lNetworkEvents & FD_WRITE) |
32874aea |
879 | connopen &= select_result(wp, (LPARAM) FD_WRITE); |
d74d141c |
880 | if (things.lNetworkEvents & FD_ACCEPT) |
881 | connopen &= select_result(wp, (LPARAM) FD_ACCEPT); |
882 | |
8df7a775 |
883 | } |
884 | } |
32874aea |
885 | } else if (n == 1) { |
5471d09a |
886 | reading = 0; |
32874aea |
887 | noise_ultralight(idata.len); |
42856df4 |
888 | if (connopen && back->socket() != NULL) { |
889 | if (idata.len > 0) { |
890 | back->send(idata.buffer, idata.len); |
891 | } else { |
892 | back->special(TS_EOF); |
893 | } |
32874aea |
894 | } |
5471d09a |
895 | } else if (n == 2) { |
896 | odata.busy = 0; |
897 | if (!odata.writeret) { |
898 | fprintf(stderr, "Unable to write to standard output\n"); |
899 | exit(0); |
900 | } |
901 | bufchain_consume(&stdout_data, odata.lenwritten); |
902 | if (bufchain_size(&stdout_data) > 0) |
903 | try_output(0); |
42856df4 |
904 | if (connopen && back->socket() != NULL) { |
905 | back->unthrottle(bufchain_size(&stdout_data) + |
906 | bufchain_size(&stderr_data)); |
907 | } |
5471d09a |
908 | } else if (n == 3) { |
909 | edata.busy = 0; |
910 | if (!edata.writeret) { |
911 | fprintf(stderr, "Unable to write to standard output\n"); |
912 | exit(0); |
913 | } |
914 | bufchain_consume(&stderr_data, edata.lenwritten); |
915 | if (bufchain_size(&stderr_data) > 0) |
916 | try_output(1); |
42856df4 |
917 | if (connopen && back->socket() != NULL) { |
918 | back->unthrottle(bufchain_size(&stdout_data) + |
919 | bufchain_size(&stderr_data)); |
920 | } |
5471d09a |
921 | } |
922 | if (!reading && back->sendbuffer() < MAX_STDIN_BACKLOG) { |
32874aea |
923 | SetEvent(idata.eventback); |
5471d09a |
924 | reading = 1; |
32874aea |
925 | } |
42856df4 |
926 | if ((!connopen || back->socket() == NULL) && |
927 | bufchain_size(&stdout_data) == 0 && |
928 | bufchain_size(&stderr_data) == 0) |
32874aea |
929 | break; /* we closed the connection */ |
12dc4ec0 |
930 | } |
931 | WSACleanup(); |
932 | return 0; |
933 | } |