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Merge branch 'pr/2986'
[mirror_frr.git] / lib / vty.c
1 /*
2 * Virtual terminal [aka TeletYpe] interface routine.
3 * Copyright (C) 1997, 98 Kunihiro Ishiguro
4 *
5 * This file is part of GNU Zebra.
6 *
7 * GNU Zebra is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2, or (at your option) any
10 * later version.
11 *
12 * GNU Zebra is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License along
18 * with this program; see the file COPYING; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include <zebra.h>
23
24 #include <lib/version.h>
25 #include <sys/types.h>
26 #include <regex.h>
27 #include <stdio.h>
28
29 #include "linklist.h"
30 #include "thread.h"
31 #include "buffer.h"
32 #include "command.h"
33 #include "sockunion.h"
34 #include "memory.h"
35 #include "log.h"
36 #include "prefix.h"
37 #include "filter.h"
38 #include "vty.h"
39 #include "privs.h"
40 #include "network.h"
41 #include "libfrr.h"
42 #include "frrstr.h"
43 #include "lib_errors.h"
44
45 #include <arpa/telnet.h>
46 #include <termios.h>
47
48 DEFINE_MTYPE_STATIC(LIB, VTY, "VTY")
49 DEFINE_MTYPE_STATIC(LIB, VTY_OUT_BUF, "VTY output buffer")
50 DEFINE_MTYPE_STATIC(LIB, VTY_HIST, "VTY history")
51
52 /* Vty events */
53 enum event {
54 VTY_SERV,
55 VTY_READ,
56 VTY_WRITE,
57 VTY_TIMEOUT_RESET,
58 #ifdef VTYSH
59 VTYSH_SERV,
60 VTYSH_READ,
61 VTYSH_WRITE
62 #endif /* VTYSH */
63 };
64
65 static void vty_event(enum event, int, struct vty *);
66
67 /* Extern host structure from command.c */
68 extern struct host host;
69
70 /* Vector which store each vty structure. */
71 static vector vtyvec;
72
73 /* Vty timeout value. */
74 static unsigned long vty_timeout_val = VTY_TIMEOUT_DEFAULT;
75
76 /* Vty access-class command */
77 static char *vty_accesslist_name = NULL;
78
79 /* Vty access-calss for IPv6. */
80 static char *vty_ipv6_accesslist_name = NULL;
81
82 /* VTY server thread. */
83 static vector Vvty_serv_thread;
84
85 /* Current directory. */
86 char *vty_cwd = NULL;
87
88 /* Configure lock. */
89 static int vty_config;
90 static int vty_config_is_lockless = 0;
91
92 /* Login password check. */
93 static int no_password_check = 0;
94
95 /* Integrated configuration file path */
96 char integrate_default[] = SYSCONFDIR INTEGRATE_DEFAULT_CONFIG;
97
98 static int do_log_commands = 0;
99
100 void vty_frame(struct vty *vty, const char *format, ...)
101 {
102 va_list args;
103
104 va_start(args, format);
105 vsnprintf(vty->frame + vty->frame_pos,
106 sizeof(vty->frame) - vty->frame_pos, format, args);
107 vty->frame_pos = strlen(vty->frame);
108 va_end(args);
109 }
110
111 void vty_endframe(struct vty *vty, const char *endtext)
112 {
113 if (vty->frame_pos == 0 && endtext)
114 vty_out(vty, "%s", endtext);
115 vty->frame_pos = 0;
116 }
117
118 bool vty_set_include(struct vty *vty, const char *regexp)
119 {
120 int errcode;
121 bool ret = true;
122 char errbuf[256];
123
124 if (!regexp) {
125 if (vty->filter) {
126 regfree(&vty->include);
127 vty->filter = false;
128 }
129 return true;
130 }
131
132 errcode = regcomp(&vty->include, regexp,
133 REG_EXTENDED | REG_NEWLINE | REG_NOSUB);
134 if (errcode) {
135 ret = false;
136 regerror(ret, &vty->include, errbuf, sizeof(errbuf));
137 vty_out(vty, "%% Regex compilation error: %s", errbuf);
138 } else {
139 vty->filter = true;
140 }
141
142 return ret;
143 }
144
145 /* VTY standard output function. */
146 int vty_out(struct vty *vty, const char *format, ...)
147 {
148 va_list args;
149 int len = 0;
150 int size = 1024;
151 char buf[1024];
152 char *p = NULL;
153 char *filtered;
154
155 if (vty->frame_pos) {
156 vty->frame_pos = 0;
157 vty_out(vty, "%s", vty->frame);
158 }
159
160 /* Try to write to initial buffer. */
161 va_start(args, format);
162 len = vsnprintf(buf, sizeof(buf), format, args);
163 va_end(args);
164
165 /* Initial buffer is not enough. */
166 if (len < 0 || len >= size) {
167 while (1) {
168 if (len > -1)
169 size = len + 1;
170 else
171 size = size * 2;
172
173 p = XREALLOC(MTYPE_VTY_OUT_BUF, p, size);
174 if (!p)
175 return -1;
176
177 va_start(args, format);
178 len = vsnprintf(p, size, format, args);
179 va_end(args);
180
181 if (len > -1 && len < size)
182 break;
183 }
184 }
185
186 /* When initial buffer is enough to store all output. */
187 if (!p)
188 p = buf;
189
190 /* filter buffer */
191 if (vty->filter) {
192 vector lines = frrstr_split_vec(p, "\n");
193
194 /* Place first value in the cache */
195 char *firstline = vector_slot(lines, 0);
196 buffer_put(vty->lbuf, (uint8_t *) firstline, strlen(firstline));
197
198 /* If our split returned more than one entry, time to filter */
199 if (vector_active(lines) > 1) {
200 /*
201 * returned string is MTYPE_TMP so it matches the MTYPE
202 * of everything else in the vector
203 */
204 char *bstr = buffer_getstr(vty->lbuf);
205 buffer_reset(vty->lbuf);
206 XFREE(MTYPE_TMP, lines->index[0]);
207 vector_set_index(lines, 0, bstr);
208 frrstr_filter_vec(lines, &vty->include);
209 vector_compact(lines);
210 /*
211 * Consider the string "foo\n". If the regex is an empty string
212 * and the line ended with a newline, then the vector will look
213 * like:
214 *
215 * [0]: 'foo'
216 * [1]: ''
217 *
218 * If the regex isn't empty, the vector will look like:
219 *
220 * [0]: 'foo'
221 *
222 * In this case we'd like to preserve the newline, so we add
223 * the empty string [1] as in the first example.
224 */
225 if (p[strlen(p) - 1] == '\n' && vector_active(lines) > 0
226 && strlen(vector_slot(lines, vector_active(lines) - 1)))
227 vector_set(lines, XSTRDUP(MTYPE_TMP, ""));
228
229 filtered = frrstr_join_vec(lines, "\n");
230 }
231 else {
232 filtered = NULL;
233 }
234
235 frrstr_strvec_free(lines);
236
237 } else {
238 filtered = p;
239 }
240
241 if (!filtered)
242 goto done;
243
244 switch (vty->type) {
245 case VTY_TERM:
246 /* print with crlf replacement */
247 buffer_put_crlf(vty->obuf, (uint8_t *)filtered,
248 strlen(filtered));
249 break;
250 case VTY_SHELL:
251 fprintf(vty->of, "%s", filtered);
252 fflush(vty->of);
253 break;
254 case VTY_SHELL_SERV:
255 case VTY_FILE:
256 default:
257 /* print without crlf replacement */
258 buffer_put(vty->obuf, (uint8_t *)filtered, strlen(filtered));
259 break;
260 }
261
262 done:
263
264 if (vty->filter && filtered)
265 XFREE(MTYPE_TMP, filtered);
266
267 /* If p is not different with buf, it is allocated buffer. */
268 if (p != buf)
269 XFREE(MTYPE_VTY_OUT_BUF, p);
270
271 return len;
272 }
273
274 static int vty_log_out(struct vty *vty, const char *level,
275 const char *proto_str, const char *format,
276 struct timestamp_control *ctl, va_list va)
277 {
278 int ret;
279 int len;
280 char buf[1024];
281
282 if (!ctl->already_rendered) {
283 ctl->len = quagga_timestamp(ctl->precision, ctl->buf,
284 sizeof(ctl->buf));
285 ctl->already_rendered = 1;
286 }
287 if (ctl->len + 1 >= sizeof(buf))
288 return -1;
289 memcpy(buf, ctl->buf, len = ctl->len);
290 buf[len++] = ' ';
291 buf[len] = '\0';
292
293 if (level)
294 ret = snprintf(buf + len, sizeof(buf) - len, "%s: %s: ", level,
295 proto_str);
296 else
297 ret = snprintf(buf + len, sizeof(buf) - len, "%s: ", proto_str);
298 if ((ret < 0) || ((size_t)(len += ret) >= sizeof(buf)))
299 return -1;
300
301 if (((ret = vsnprintf(buf + len, sizeof(buf) - len, format, va)) < 0)
302 || ((size_t)((len += ret) + 2) > sizeof(buf)))
303 return -1;
304
305 buf[len++] = '\r';
306 buf[len++] = '\n';
307
308 if (write(vty->wfd, buf, len) < 0) {
309 if (ERRNO_IO_RETRY(errno))
310 /* Kernel buffer is full, probably too much debugging
311 output, so just
312 drop the data and ignore. */
313 return -1;
314 /* Fatal I/O error. */
315 vty->monitor =
316 0; /* disable monitoring to avoid infinite recursion */
317 flog_err(EC_LIB_SOCKET,
318 "%s: write failed to vty client fd %d, closing: %s",
319 __func__, vty->fd, safe_strerror(errno));
320 buffer_reset(vty->obuf);
321 buffer_reset(vty->lbuf);
322 /* cannot call vty_close, because a parent routine may still try
323 to access the vty struct */
324 vty->status = VTY_CLOSE;
325 shutdown(vty->fd, SHUT_RDWR);
326 return -1;
327 }
328 return 0;
329 }
330
331 /* Output current time to the vty. */
332 void vty_time_print(struct vty *vty, int cr)
333 {
334 char buf[QUAGGA_TIMESTAMP_LEN];
335
336 if (quagga_timestamp(0, buf, sizeof(buf)) == 0) {
337 zlog_info("quagga_timestamp error");
338 return;
339 }
340 if (cr)
341 vty_out(vty, "%s\n", buf);
342 else
343 vty_out(vty, "%s ", buf);
344
345 return;
346 }
347
348 /* Say hello to vty interface. */
349 void vty_hello(struct vty *vty)
350 {
351 if (host.motdfile) {
352 FILE *f;
353 char buf[4096];
354
355 f = fopen(host.motdfile, "r");
356 if (f) {
357 while (fgets(buf, sizeof(buf), f)) {
358 char *s;
359 /* work backwards to ignore trailling isspace()
360 */
361 for (s = buf + strlen(buf);
362 (s > buf) && isspace((int)*(s - 1)); s--)
363 ;
364 *s = '\0';
365 vty_out(vty, "%s\n", buf);
366 }
367 fclose(f);
368 } else
369 vty_out(vty, "MOTD file not found\n");
370 } else if (host.motd)
371 vty_out(vty, "%s", host.motd);
372 }
373
374 /* Put out prompt and wait input from user. */
375 static void vty_prompt(struct vty *vty)
376 {
377 if (vty->type == VTY_TERM) {
378 vty_out(vty, cmd_prompt(vty->node), cmd_hostname_get());
379 }
380 }
381
382 /* Send WILL TELOPT_ECHO to remote server. */
383 static void vty_will_echo(struct vty *vty)
384 {
385 unsigned char cmd[] = {IAC, WILL, TELOPT_ECHO, '\0'};
386 vty_out(vty, "%s", cmd);
387 }
388
389 /* Make suppress Go-Ahead telnet option. */
390 static void vty_will_suppress_go_ahead(struct vty *vty)
391 {
392 unsigned char cmd[] = {IAC, WILL, TELOPT_SGA, '\0'};
393 vty_out(vty, "%s", cmd);
394 }
395
396 /* Make don't use linemode over telnet. */
397 static void vty_dont_linemode(struct vty *vty)
398 {
399 unsigned char cmd[] = {IAC, DONT, TELOPT_LINEMODE, '\0'};
400 vty_out(vty, "%s", cmd);
401 }
402
403 /* Use window size. */
404 static void vty_do_window_size(struct vty *vty)
405 {
406 unsigned char cmd[] = {IAC, DO, TELOPT_NAWS, '\0'};
407 vty_out(vty, "%s", cmd);
408 }
409
410 #if 0 /* Currently not used. */
411 /* Make don't use lflow vty interface. */
412 static void
413 vty_dont_lflow_ahead (struct vty *vty)
414 {
415 unsigned char cmd[] = { IAC, DONT, TELOPT_LFLOW, '\0' };
416 vty_out (vty, "%s", cmd);
417 }
418 #endif /* 0 */
419
420 /* Authentication of vty */
421 static void vty_auth(struct vty *vty, char *buf)
422 {
423 char *passwd = NULL;
424 enum node_type next_node = 0;
425 int fail;
426 char *crypt(const char *, const char *);
427
428 switch (vty->node) {
429 case AUTH_NODE:
430 if (host.encrypt)
431 passwd = host.password_encrypt;
432 else
433 passwd = host.password;
434 if (host.advanced)
435 next_node = host.enable ? VIEW_NODE : ENABLE_NODE;
436 else
437 next_node = VIEW_NODE;
438 break;
439 case AUTH_ENABLE_NODE:
440 if (host.encrypt)
441 passwd = host.enable_encrypt;
442 else
443 passwd = host.enable;
444 next_node = ENABLE_NODE;
445 break;
446 }
447
448 if (passwd) {
449 if (host.encrypt)
450 fail = strcmp(crypt(buf, passwd), passwd);
451 else
452 fail = strcmp(buf, passwd);
453 } else
454 fail = 1;
455
456 if (!fail) {
457 vty->fail = 0;
458 vty->node = next_node; /* Success ! */
459 } else {
460 vty->fail++;
461 if (vty->fail >= 3) {
462 if (vty->node == AUTH_NODE) {
463 vty_out(vty,
464 "%% Bad passwords, too many failures!\n");
465 vty->status = VTY_CLOSE;
466 } else {
467 /* AUTH_ENABLE_NODE */
468 vty->fail = 0;
469 vty_out(vty,
470 "%% Bad enable passwords, too many failures!\n");
471 vty->status = VTY_CLOSE;
472 }
473 }
474 }
475 }
476
477 /* Command execution over the vty interface. */
478 static int vty_command(struct vty *vty, char *buf)
479 {
480 int ret;
481 const char *protocolname;
482 char *cp = NULL;
483
484 assert(vty);
485
486 /*
487 * Log non empty command lines
488 */
489 if (do_log_commands)
490 cp = buf;
491 if (cp != NULL) {
492 /* Skip white spaces. */
493 while (isspace((int)*cp) && *cp != '\0')
494 cp++;
495 }
496 if (cp != NULL && *cp != '\0') {
497 unsigned i;
498 char vty_str[VTY_BUFSIZ];
499 char prompt_str[VTY_BUFSIZ];
500
501 /* format the base vty info */
502 snprintf(vty_str, sizeof(vty_str), "vty[??]@%s", vty->address);
503
504 for (i = 0; i < vector_active(vtyvec); i++)
505 if (vty == vector_slot(vtyvec, i)) {
506 snprintf(vty_str, sizeof(vty_str), "vty[%d]@%s",
507 i, vty->address);
508 break;
509 }
510
511 /* format the prompt */
512 snprintf(prompt_str, sizeof(prompt_str), cmd_prompt(vty->node),
513 vty_str);
514
515 /* now log the command */
516 zlog_notice("%s%s", prompt_str, buf);
517 }
518
519 #ifdef CONSUMED_TIME_CHECK
520 {
521 RUSAGE_T before;
522 RUSAGE_T after;
523 unsigned long realtime, cputime;
524
525 GETRUSAGE(&before);
526 #endif /* CONSUMED_TIME_CHECK */
527
528 ret = cmd_execute(vty, buf, NULL, 0);
529
530 /* Get the name of the protocol if any */
531 protocolname = frr_protoname;
532
533 #ifdef CONSUMED_TIME_CHECK
534 GETRUSAGE(&after);
535 if ((realtime = thread_consumed_time(&after, &before, &cputime))
536 > CONSUMED_TIME_CHECK)
537 /* Warn about CPU hog that must be fixed. */
538 flog_warn(
539 EC_LIB_SLOW_THREAD,
540 "SLOW COMMAND: command took %lums (cpu time %lums): %s",
541 realtime / 1000, cputime / 1000, buf);
542 }
543 #endif /* CONSUMED_TIME_CHECK */
544
545 if (ret != CMD_SUCCESS)
546 switch (ret) {
547 case CMD_WARNING:
548 if (vty->type == VTY_FILE)
549 vty_out(vty, "Warning...\n");
550 break;
551 case CMD_ERR_AMBIGUOUS:
552 vty_out(vty, "%% Ambiguous command.\n");
553 break;
554 case CMD_ERR_NO_MATCH:
555 vty_out(vty, "%% [%s] Unknown command: %s\n",
556 protocolname, buf);
557 break;
558 case CMD_ERR_INCOMPLETE:
559 vty_out(vty, "%% Command incomplete.\n");
560 break;
561 }
562
563 return ret;
564 }
565
566 static const char telnet_backward_char = 0x08;
567 static const char telnet_space_char = ' ';
568
569 /* Basic function to write buffer to vty. */
570 static void vty_write(struct vty *vty, const char *buf, size_t nbytes)
571 {
572 if ((vty->node == AUTH_NODE) || (vty->node == AUTH_ENABLE_NODE))
573 return;
574
575 /* Should we do buffering here ? And make vty_flush (vty) ? */
576 buffer_put(vty->obuf, buf, nbytes);
577 }
578
579 /* Basic function to insert character into vty. */
580 static void vty_self_insert(struct vty *vty, char c)
581 {
582 int i;
583 int length;
584
585 if (vty->length + 1 >= VTY_BUFSIZ)
586 return;
587
588 length = vty->length - vty->cp;
589 memmove(&vty->buf[vty->cp + 1], &vty->buf[vty->cp], length);
590 vty->buf[vty->cp] = c;
591
592 vty_write(vty, &vty->buf[vty->cp], length + 1);
593 for (i = 0; i < length; i++)
594 vty_write(vty, &telnet_backward_char, 1);
595
596 vty->cp++;
597 vty->length++;
598
599 vty->buf[vty->length] = '\0';
600 }
601
602 /* Self insert character 'c' in overwrite mode. */
603 static void vty_self_insert_overwrite(struct vty *vty, char c)
604 {
605 if (vty->cp == vty->length) {
606 vty_self_insert(vty, c);
607 return;
608 }
609
610 vty->buf[vty->cp++] = c;
611 vty_write(vty, &c, 1);
612 }
613
614 /**
615 * Insert a string into vty->buf at the current cursor position.
616 *
617 * If the resultant string would be larger than VTY_BUFSIZ it is
618 * truncated to fit.
619 */
620 static void vty_insert_word_overwrite(struct vty *vty, char *str)
621 {
622 if (vty->cp == VTY_BUFSIZ)
623 return;
624
625 size_t nwrite = MIN((int)strlen(str), VTY_BUFSIZ - vty->cp - 1);
626 memcpy(&vty->buf[vty->cp], str, nwrite);
627 vty->cp += nwrite;
628 vty->length = MAX(vty->cp, vty->length);
629 vty->buf[vty->length] = '\0';
630 vty_write(vty, str, nwrite);
631 }
632
633 /* Forward character. */
634 static void vty_forward_char(struct vty *vty)
635 {
636 if (vty->cp < vty->length) {
637 vty_write(vty, &vty->buf[vty->cp], 1);
638 vty->cp++;
639 }
640 }
641
642 /* Backward character. */
643 static void vty_backward_char(struct vty *vty)
644 {
645 if (vty->cp > 0) {
646 vty->cp--;
647 vty_write(vty, &telnet_backward_char, 1);
648 }
649 }
650
651 /* Move to the beginning of the line. */
652 static void vty_beginning_of_line(struct vty *vty)
653 {
654 while (vty->cp)
655 vty_backward_char(vty);
656 }
657
658 /* Move to the end of the line. */
659 static void vty_end_of_line(struct vty *vty)
660 {
661 while (vty->cp < vty->length)
662 vty_forward_char(vty);
663 }
664
665 static void vty_kill_line_from_beginning(struct vty *);
666 static void vty_redraw_line(struct vty *);
667
668 /* Print command line history. This function is called from
669 vty_next_line and vty_previous_line. */
670 static void vty_history_print(struct vty *vty)
671 {
672 int length;
673
674 vty_kill_line_from_beginning(vty);
675
676 /* Get previous line from history buffer */
677 length = strlen(vty->hist[vty->hp]);
678 memcpy(vty->buf, vty->hist[vty->hp], length);
679 vty->cp = vty->length = length;
680 vty->buf[vty->length] = '\0';
681
682 /* Redraw current line */
683 vty_redraw_line(vty);
684 }
685
686 /* Show next command line history. */
687 static void vty_next_line(struct vty *vty)
688 {
689 int try_index;
690
691 if (vty->hp == vty->hindex)
692 return;
693
694 /* Try is there history exist or not. */
695 try_index = vty->hp;
696 if (try_index == (VTY_MAXHIST - 1))
697 try_index = 0;
698 else
699 try_index++;
700
701 /* If there is not history return. */
702 if (vty->hist[try_index] == NULL)
703 return;
704 else
705 vty->hp = try_index;
706
707 vty_history_print(vty);
708 }
709
710 /* Show previous command line history. */
711 static void vty_previous_line(struct vty *vty)
712 {
713 int try_index;
714
715 try_index = vty->hp;
716 if (try_index == 0)
717 try_index = VTY_MAXHIST - 1;
718 else
719 try_index--;
720
721 if (vty->hist[try_index] == NULL)
722 return;
723 else
724 vty->hp = try_index;
725
726 vty_history_print(vty);
727 }
728
729 /* This function redraw all of the command line character. */
730 static void vty_redraw_line(struct vty *vty)
731 {
732 vty_write(vty, vty->buf, vty->length);
733 vty->cp = vty->length;
734 }
735
736 /* Forward word. */
737 static void vty_forward_word(struct vty *vty)
738 {
739 while (vty->cp != vty->length && vty->buf[vty->cp] != ' ')
740 vty_forward_char(vty);
741
742 while (vty->cp != vty->length && vty->buf[vty->cp] == ' ')
743 vty_forward_char(vty);
744 }
745
746 /* Backward word without skipping training space. */
747 static void vty_backward_pure_word(struct vty *vty)
748 {
749 while (vty->cp > 0 && vty->buf[vty->cp - 1] != ' ')
750 vty_backward_char(vty);
751 }
752
753 /* Backward word. */
754 static void vty_backward_word(struct vty *vty)
755 {
756 while (vty->cp > 0 && vty->buf[vty->cp - 1] == ' ')
757 vty_backward_char(vty);
758
759 while (vty->cp > 0 && vty->buf[vty->cp - 1] != ' ')
760 vty_backward_char(vty);
761 }
762
763 /* When '^D' is typed at the beginning of the line we move to the down
764 level. */
765 static void vty_down_level(struct vty *vty)
766 {
767 vty_out(vty, "\n");
768 cmd_exit(vty);
769 vty_prompt(vty);
770 vty->cp = 0;
771 }
772
773 /* When '^Z' is received from vty, move down to the enable mode. */
774 static void vty_end_config(struct vty *vty)
775 {
776 vty_out(vty, "\n");
777
778 switch (vty->node) {
779 case VIEW_NODE:
780 case ENABLE_NODE:
781 /* Nothing to do. */
782 break;
783 case CONFIG_NODE:
784 case INTERFACE_NODE:
785 case PW_NODE:
786 case ZEBRA_NODE:
787 case RIP_NODE:
788 case RIPNG_NODE:
789 case EIGRP_NODE:
790 case BGP_NODE:
791 case BGP_VPNV4_NODE:
792 case BGP_VPNV6_NODE:
793 case BGP_VRF_POLICY_NODE:
794 case BGP_VNC_DEFAULTS_NODE:
795 case BGP_VNC_NVE_GROUP_NODE:
796 case BGP_VNC_L2_GROUP_NODE:
797 case BGP_IPV4_NODE:
798 case BGP_IPV4M_NODE:
799 case BGP_IPV4L_NODE:
800 case BGP_IPV6_NODE:
801 case BGP_IPV6M_NODE:
802 case BGP_EVPN_NODE:
803 case BGP_IPV6L_NODE:
804 case RMAP_NODE:
805 case PBRMAP_NODE:
806 case OSPF_NODE:
807 case OSPF6_NODE:
808 case LDP_NODE:
809 case LDP_IPV4_NODE:
810 case LDP_IPV6_NODE:
811 case LDP_IPV4_IFACE_NODE:
812 case LDP_IPV6_IFACE_NODE:
813 case LDP_L2VPN_NODE:
814 case LDP_PSEUDOWIRE_NODE:
815 case ISIS_NODE:
816 case OPENFABRIC_NODE:
817 case KEYCHAIN_NODE:
818 case KEYCHAIN_KEY_NODE:
819 case VTY_NODE:
820 case BGP_EVPN_VNI_NODE:
821 case BFD_NODE:
822 case BFD_PEER_NODE:
823 vty_config_unlock(vty);
824 vty->node = ENABLE_NODE;
825 break;
826 default:
827 /* Unknown node, we have to ignore it. */
828 break;
829 }
830
831 vty_prompt(vty);
832 vty->cp = 0;
833 }
834
835 /* Delete a charcter at the current point. */
836 static void vty_delete_char(struct vty *vty)
837 {
838 int i;
839 int size;
840
841 if (vty->length == 0) {
842 vty_down_level(vty);
843 return;
844 }
845
846 if (vty->cp == vty->length)
847 return; /* completion need here? */
848
849 size = vty->length - vty->cp;
850
851 vty->length--;
852 memmove(&vty->buf[vty->cp], &vty->buf[vty->cp + 1], size - 1);
853 vty->buf[vty->length] = '\0';
854
855 if (vty->node == AUTH_NODE || vty->node == AUTH_ENABLE_NODE)
856 return;
857
858 vty_write(vty, &vty->buf[vty->cp], size - 1);
859 vty_write(vty, &telnet_space_char, 1);
860
861 for (i = 0; i < size; i++)
862 vty_write(vty, &telnet_backward_char, 1);
863 }
864
865 /* Delete a character before the point. */
866 static void vty_delete_backward_char(struct vty *vty)
867 {
868 if (vty->cp == 0)
869 return;
870
871 vty_backward_char(vty);
872 vty_delete_char(vty);
873 }
874
875 /* Kill rest of line from current point. */
876 static void vty_kill_line(struct vty *vty)
877 {
878 int i;
879 int size;
880
881 size = vty->length - vty->cp;
882
883 if (size == 0)
884 return;
885
886 for (i = 0; i < size; i++)
887 vty_write(vty, &telnet_space_char, 1);
888 for (i = 0; i < size; i++)
889 vty_write(vty, &telnet_backward_char, 1);
890
891 memset(&vty->buf[vty->cp], 0, size);
892 vty->length = vty->cp;
893 }
894
895 /* Kill line from the beginning. */
896 static void vty_kill_line_from_beginning(struct vty *vty)
897 {
898 vty_beginning_of_line(vty);
899 vty_kill_line(vty);
900 }
901
902 /* Delete a word before the point. */
903 static void vty_forward_kill_word(struct vty *vty)
904 {
905 while (vty->cp != vty->length && vty->buf[vty->cp] == ' ')
906 vty_delete_char(vty);
907 while (vty->cp != vty->length && vty->buf[vty->cp] != ' ')
908 vty_delete_char(vty);
909 }
910
911 /* Delete a word before the point. */
912 static void vty_backward_kill_word(struct vty *vty)
913 {
914 while (vty->cp > 0 && vty->buf[vty->cp - 1] == ' ')
915 vty_delete_backward_char(vty);
916 while (vty->cp > 0 && vty->buf[vty->cp - 1] != ' ')
917 vty_delete_backward_char(vty);
918 }
919
920 /* Transpose chars before or at the point. */
921 static void vty_transpose_chars(struct vty *vty)
922 {
923 char c1, c2;
924
925 /* If length is short or point is near by the beginning of line then
926 return. */
927 if (vty->length < 2 || vty->cp < 1)
928 return;
929
930 /* In case of point is located at the end of the line. */
931 if (vty->cp == vty->length) {
932 c1 = vty->buf[vty->cp - 1];
933 c2 = vty->buf[vty->cp - 2];
934
935 vty_backward_char(vty);
936 vty_backward_char(vty);
937 vty_self_insert_overwrite(vty, c1);
938 vty_self_insert_overwrite(vty, c2);
939 } else {
940 c1 = vty->buf[vty->cp];
941 c2 = vty->buf[vty->cp - 1];
942
943 vty_backward_char(vty);
944 vty_self_insert_overwrite(vty, c1);
945 vty_self_insert_overwrite(vty, c2);
946 }
947 }
948
949 /* Do completion at vty interface. */
950 static void vty_complete_command(struct vty *vty)
951 {
952 int i;
953 int ret;
954 char **matched = NULL;
955 vector vline;
956
957 if (vty->node == AUTH_NODE || vty->node == AUTH_ENABLE_NODE)
958 return;
959
960 vline = cmd_make_strvec(vty->buf);
961 if (vline == NULL)
962 return;
963
964 /* In case of 'help \t'. */
965 if (isspace((int)vty->buf[vty->length - 1]))
966 vector_set(vline, NULL);
967
968 matched = cmd_complete_command(vline, vty, &ret);
969
970 cmd_free_strvec(vline);
971
972 vty_out(vty, "\n");
973 switch (ret) {
974 case CMD_ERR_AMBIGUOUS:
975 vty_out(vty, "%% Ambiguous command.\n");
976 vty_prompt(vty);
977 vty_redraw_line(vty);
978 break;
979 case CMD_ERR_NO_MATCH:
980 /* vty_out (vty, "%% There is no matched command.\n"); */
981 vty_prompt(vty);
982 vty_redraw_line(vty);
983 break;
984 case CMD_COMPLETE_FULL_MATCH:
985 if (!matched[0]) {
986 /* 2016-11-28 equinox -- need to debug, SEGV here */
987 vty_out(vty, "%% CLI BUG: FULL_MATCH with NULL str\n");
988 vty_prompt(vty);
989 vty_redraw_line(vty);
990 break;
991 }
992 vty_prompt(vty);
993 vty_redraw_line(vty);
994 vty_backward_pure_word(vty);
995 vty_insert_word_overwrite(vty, matched[0]);
996 vty_self_insert(vty, ' ');
997 XFREE(MTYPE_COMPLETION, matched[0]);
998 break;
999 case CMD_COMPLETE_MATCH:
1000 vty_prompt(vty);
1001 vty_redraw_line(vty);
1002 vty_backward_pure_word(vty);
1003 vty_insert_word_overwrite(vty, matched[0]);
1004 XFREE(MTYPE_COMPLETION, matched[0]);
1005 break;
1006 case CMD_COMPLETE_LIST_MATCH:
1007 for (i = 0; matched[i] != NULL; i++) {
1008 if (i != 0 && ((i % 6) == 0))
1009 vty_out(vty, "\n");
1010 vty_out(vty, "%-10s ", matched[i]);
1011 XFREE(MTYPE_COMPLETION, matched[i]);
1012 }
1013 vty_out(vty, "\n");
1014
1015 vty_prompt(vty);
1016 vty_redraw_line(vty);
1017 break;
1018 case CMD_ERR_NOTHING_TODO:
1019 vty_prompt(vty);
1020 vty_redraw_line(vty);
1021 break;
1022 default:
1023 break;
1024 }
1025 if (matched)
1026 XFREE(MTYPE_TMP, matched);
1027 }
1028
1029 static void vty_describe_fold(struct vty *vty, int cmd_width,
1030 unsigned int desc_width, struct cmd_token *token)
1031 {
1032 char *buf;
1033 const char *cmd, *p;
1034 int pos;
1035
1036 cmd = token->text;
1037
1038 if (desc_width <= 0) {
1039 vty_out(vty, " %-*s %s\n", cmd_width, cmd, token->desc);
1040 return;
1041 }
1042
1043 buf = XCALLOC(MTYPE_TMP, strlen(token->desc) + 1);
1044
1045 for (p = token->desc; strlen(p) > desc_width; p += pos + 1) {
1046 for (pos = desc_width; pos > 0; pos--)
1047 if (*(p + pos) == ' ')
1048 break;
1049
1050 if (pos == 0)
1051 break;
1052
1053 strncpy(buf, p, pos);
1054 buf[pos] = '\0';
1055 vty_out(vty, " %-*s %s\n", cmd_width, cmd, buf);
1056
1057 cmd = "";
1058 }
1059
1060 vty_out(vty, " %-*s %s\n", cmd_width, cmd, p);
1061
1062 XFREE(MTYPE_TMP, buf);
1063 }
1064
1065 /* Describe matched command function. */
1066 static void vty_describe_command(struct vty *vty)
1067 {
1068 int ret;
1069 vector vline;
1070 vector describe;
1071 unsigned int i, width, desc_width;
1072 struct cmd_token *token, *token_cr = NULL;
1073
1074 vline = cmd_make_strvec(vty->buf);
1075
1076 /* In case of '> ?'. */
1077 if (vline == NULL) {
1078 vline = vector_init(1);
1079 vector_set(vline, NULL);
1080 } else if (isspace((int)vty->buf[vty->length - 1]))
1081 vector_set(vline, NULL);
1082
1083 describe = cmd_describe_command(vline, vty, &ret);
1084
1085 vty_out(vty, "\n");
1086
1087 /* Ambiguous error. */
1088 switch (ret) {
1089 case CMD_ERR_AMBIGUOUS:
1090 vty_out(vty, "%% Ambiguous command.\n");
1091 goto out;
1092 break;
1093 case CMD_ERR_NO_MATCH:
1094 vty_out(vty, "%% There is no matched command.\n");
1095 goto out;
1096 break;
1097 }
1098
1099 /* Get width of command string. */
1100 width = 0;
1101 for (i = 0; i < vector_active(describe); i++)
1102 if ((token = vector_slot(describe, i)) != NULL) {
1103 unsigned int len;
1104
1105 if (token->text[0] == '\0')
1106 continue;
1107
1108 len = strlen(token->text);
1109
1110 if (width < len)
1111 width = len;
1112 }
1113
1114 /* Get width of description string. */
1115 desc_width = vty->width - (width + 6);
1116
1117 /* Print out description. */
1118 for (i = 0; i < vector_active(describe); i++)
1119 if ((token = vector_slot(describe, i)) != NULL) {
1120 if (token->text[0] == '\0')
1121 continue;
1122
1123 if (strcmp(token->text, CMD_CR_TEXT) == 0) {
1124 token_cr = token;
1125 continue;
1126 }
1127
1128 if (!token->desc)
1129 vty_out(vty, " %-s\n", token->text);
1130 else if (desc_width >= strlen(token->desc))
1131 vty_out(vty, " %-*s %s\n", width, token->text,
1132 token->desc);
1133 else
1134 vty_describe_fold(vty, width, desc_width,
1135 token);
1136
1137 if (IS_VARYING_TOKEN(token->type)) {
1138 const char *ref = vector_slot(
1139 vline, vector_active(vline) - 1);
1140
1141 vector varcomps = vector_init(VECTOR_MIN_SIZE);
1142 cmd_variable_complete(token, ref, varcomps);
1143
1144 if (vector_active(varcomps) > 0) {
1145 char *ac = cmd_variable_comp2str(
1146 varcomps, vty->width);
1147 vty_out(vty, "%s\n", ac);
1148 XFREE(MTYPE_TMP, ac);
1149 }
1150
1151 vector_free(varcomps);
1152 }
1153 #if 0
1154 vty_out (vty, " %-*s %s\n", width
1155 desc->cmd[0] == '.' ? desc->cmd + 1 : desc->cmd,
1156 desc->str ? desc->str : "");
1157 #endif /* 0 */
1158 }
1159
1160 if ((token = token_cr)) {
1161 if (!token->desc)
1162 vty_out(vty, " %-s\n", token->text);
1163 else if (desc_width >= strlen(token->desc))
1164 vty_out(vty, " %-*s %s\n", width, token->text,
1165 token->desc);
1166 else
1167 vty_describe_fold(vty, width, desc_width, token);
1168 }
1169
1170 out:
1171 cmd_free_strvec(vline);
1172 if (describe)
1173 vector_free(describe);
1174
1175 vty_prompt(vty);
1176 vty_redraw_line(vty);
1177 }
1178
1179 static void vty_clear_buf(struct vty *vty)
1180 {
1181 memset(vty->buf, 0, vty->max);
1182 }
1183
1184 /* ^C stop current input and do not add command line to the history. */
1185 static void vty_stop_input(struct vty *vty)
1186 {
1187 vty->cp = vty->length = 0;
1188 vty_clear_buf(vty);
1189 vty_out(vty, "\n");
1190
1191 switch (vty->node) {
1192 case VIEW_NODE:
1193 case ENABLE_NODE:
1194 /* Nothing to do. */
1195 break;
1196 case CONFIG_NODE:
1197 case INTERFACE_NODE:
1198 case PW_NODE:
1199 case ZEBRA_NODE:
1200 case RIP_NODE:
1201 case RIPNG_NODE:
1202 case EIGRP_NODE:
1203 case BGP_NODE:
1204 case RMAP_NODE:
1205 case PBRMAP_NODE:
1206 case OSPF_NODE:
1207 case OSPF6_NODE:
1208 case LDP_NODE:
1209 case LDP_IPV4_NODE:
1210 case LDP_IPV6_NODE:
1211 case LDP_IPV4_IFACE_NODE:
1212 case LDP_IPV6_IFACE_NODE:
1213 case LDP_L2VPN_NODE:
1214 case LDP_PSEUDOWIRE_NODE:
1215 case ISIS_NODE:
1216 case OPENFABRIC_NODE:
1217 case KEYCHAIN_NODE:
1218 case KEYCHAIN_KEY_NODE:
1219 case VTY_NODE:
1220 case BFD_NODE:
1221 case BFD_PEER_NODE:
1222 vty_config_unlock(vty);
1223 vty->node = ENABLE_NODE;
1224 break;
1225 default:
1226 /* Unknown node, we have to ignore it. */
1227 break;
1228 }
1229 vty_prompt(vty);
1230
1231 /* Set history pointer to the latest one. */
1232 vty->hp = vty->hindex;
1233 }
1234
1235 /* Add current command line to the history buffer. */
1236 static void vty_hist_add(struct vty *vty)
1237 {
1238 int index;
1239
1240 if (vty->length == 0)
1241 return;
1242
1243 index = vty->hindex ? vty->hindex - 1 : VTY_MAXHIST - 1;
1244
1245 /* Ignore the same string as previous one. */
1246 if (vty->hist[index])
1247 if (strcmp(vty->buf, vty->hist[index]) == 0) {
1248 vty->hp = vty->hindex;
1249 return;
1250 }
1251
1252 /* Insert history entry. */
1253 if (vty->hist[vty->hindex])
1254 XFREE(MTYPE_VTY_HIST, vty->hist[vty->hindex]);
1255 vty->hist[vty->hindex] = XSTRDUP(MTYPE_VTY_HIST, vty->buf);
1256
1257 /* History index rotation. */
1258 vty->hindex++;
1259 if (vty->hindex == VTY_MAXHIST)
1260 vty->hindex = 0;
1261
1262 vty->hp = vty->hindex;
1263 }
1264
1265 /* #define TELNET_OPTION_DEBUG */
1266
1267 /* Get telnet window size. */
1268 static int vty_telnet_option(struct vty *vty, unsigned char *buf, int nbytes)
1269 {
1270 #ifdef TELNET_OPTION_DEBUG
1271 int i;
1272
1273 for (i = 0; i < nbytes; i++) {
1274 switch (buf[i]) {
1275 case IAC:
1276 vty_out(vty, "IAC ");
1277 break;
1278 case WILL:
1279 vty_out(vty, "WILL ");
1280 break;
1281 case WONT:
1282 vty_out(vty, "WONT ");
1283 break;
1284 case DO:
1285 vty_out(vty, "DO ");
1286 break;
1287 case DONT:
1288 vty_out(vty, "DONT ");
1289 break;
1290 case SB:
1291 vty_out(vty, "SB ");
1292 break;
1293 case SE:
1294 vty_out(vty, "SE ");
1295 break;
1296 case TELOPT_ECHO:
1297 vty_out(vty, "TELOPT_ECHO \n");
1298 break;
1299 case TELOPT_SGA:
1300 vty_out(vty, "TELOPT_SGA \n");
1301 break;
1302 case TELOPT_NAWS:
1303 vty_out(vty, "TELOPT_NAWS \n");
1304 break;
1305 default:
1306 vty_out(vty, "%x ", buf[i]);
1307 break;
1308 }
1309 }
1310 vty_out(vty, "\n");
1311
1312 #endif /* TELNET_OPTION_DEBUG */
1313
1314 switch (buf[0]) {
1315 case SB:
1316 vty->sb_len = 0;
1317 vty->iac_sb_in_progress = 1;
1318 return 0;
1319 break;
1320 case SE: {
1321 if (!vty->iac_sb_in_progress)
1322 return 0;
1323
1324 if ((vty->sb_len == 0) || (vty->sb_buf[0] == '\0')) {
1325 vty->iac_sb_in_progress = 0;
1326 return 0;
1327 }
1328 switch (vty->sb_buf[0]) {
1329 case TELOPT_NAWS:
1330 if (vty->sb_len != TELNET_NAWS_SB_LEN)
1331 flog_err(
1332 EC_LIB_SYSTEM_CALL,
1333 "RFC 1073 violation detected: telnet NAWS option "
1334 "should send %d characters, but we received %lu",
1335 TELNET_NAWS_SB_LEN,
1336 (unsigned long)vty->sb_len);
1337 else if (sizeof(vty->sb_buf) < TELNET_NAWS_SB_LEN)
1338 flog_err(
1339 EC_LIB_DEVELOPMENT,
1340 "Bug detected: sizeof(vty->sb_buf) %lu < %d, too small to handle the telnet NAWS option",
1341 (unsigned long)sizeof(vty->sb_buf),
1342 TELNET_NAWS_SB_LEN);
1343 else {
1344 vty->width = ((vty->sb_buf[1] << 8)
1345 | vty->sb_buf[2]);
1346 vty->height = ((vty->sb_buf[3] << 8)
1347 | vty->sb_buf[4]);
1348 #ifdef TELNET_OPTION_DEBUG
1349 vty_out(vty,
1350 "TELNET NAWS window size negotiation completed: "
1351 "width %d, height %d\n",
1352 vty->width, vty->height);
1353 #endif
1354 }
1355 break;
1356 }
1357 vty->iac_sb_in_progress = 0;
1358 return 0;
1359 break;
1360 }
1361 default:
1362 break;
1363 }
1364 return 1;
1365 }
1366
1367 /* Execute current command line. */
1368 static int vty_execute(struct vty *vty)
1369 {
1370 int ret;
1371
1372 ret = CMD_SUCCESS;
1373
1374 switch (vty->node) {
1375 case AUTH_NODE:
1376 case AUTH_ENABLE_NODE:
1377 vty_auth(vty, vty->buf);
1378 break;
1379 default:
1380 ret = vty_command(vty, vty->buf);
1381 if (vty->type == VTY_TERM)
1382 vty_hist_add(vty);
1383 break;
1384 }
1385
1386 /* Clear command line buffer. */
1387 vty->cp = vty->length = 0;
1388 vty_clear_buf(vty);
1389
1390 if (vty->status != VTY_CLOSE)
1391 vty_prompt(vty);
1392
1393 return ret;
1394 }
1395
1396 #define CONTROL(X) ((X) - '@')
1397 #define VTY_NORMAL 0
1398 #define VTY_PRE_ESCAPE 1
1399 #define VTY_ESCAPE 2
1400
1401 /* Escape character command map. */
1402 static void vty_escape_map(unsigned char c, struct vty *vty)
1403 {
1404 switch (c) {
1405 case ('A'):
1406 vty_previous_line(vty);
1407 break;
1408 case ('B'):
1409 vty_next_line(vty);
1410 break;
1411 case ('C'):
1412 vty_forward_char(vty);
1413 break;
1414 case ('D'):
1415 vty_backward_char(vty);
1416 break;
1417 default:
1418 break;
1419 }
1420
1421 /* Go back to normal mode. */
1422 vty->escape = VTY_NORMAL;
1423 }
1424
1425 /* Quit print out to the buffer. */
1426 static void vty_buffer_reset(struct vty *vty)
1427 {
1428 buffer_reset(vty->obuf);
1429 buffer_reset(vty->lbuf);
1430 vty_prompt(vty);
1431 vty_redraw_line(vty);
1432 }
1433
1434 /* Read data via vty socket. */
1435 static int vty_read(struct thread *thread)
1436 {
1437 int i;
1438 int nbytes;
1439 unsigned char buf[VTY_READ_BUFSIZ];
1440
1441 int vty_sock = THREAD_FD(thread);
1442 struct vty *vty = THREAD_ARG(thread);
1443 vty->t_read = NULL;
1444
1445 /* Read raw data from socket */
1446 if ((nbytes = read(vty->fd, buf, VTY_READ_BUFSIZ)) <= 0) {
1447 if (nbytes < 0) {
1448 if (ERRNO_IO_RETRY(errno)) {
1449 vty_event(VTY_READ, vty_sock, vty);
1450 return 0;
1451 }
1452 vty->monitor = 0; /* disable monitoring to avoid
1453 infinite recursion */
1454 flog_err(
1455 EC_LIB_SOCKET,
1456 "%s: read error on vty client fd %d, closing: %s",
1457 __func__, vty->fd, safe_strerror(errno));
1458 buffer_reset(vty->obuf);
1459 buffer_reset(vty->lbuf);
1460 }
1461 vty->status = VTY_CLOSE;
1462 }
1463
1464 for (i = 0; i < nbytes; i++) {
1465 if (buf[i] == IAC) {
1466 if (!vty->iac) {
1467 vty->iac = 1;
1468 continue;
1469 } else {
1470 vty->iac = 0;
1471 }
1472 }
1473
1474 if (vty->iac_sb_in_progress && !vty->iac) {
1475 if (vty->sb_len < sizeof(vty->sb_buf))
1476 vty->sb_buf[vty->sb_len] = buf[i];
1477 vty->sb_len++;
1478 continue;
1479 }
1480
1481 if (vty->iac) {
1482 /* In case of telnet command */
1483 int ret = 0;
1484 ret = vty_telnet_option(vty, buf + i, nbytes - i);
1485 vty->iac = 0;
1486 i += ret;
1487 continue;
1488 }
1489
1490
1491 if (vty->status == VTY_MORE) {
1492 switch (buf[i]) {
1493 case CONTROL('C'):
1494 case 'q':
1495 case 'Q':
1496 vty_buffer_reset(vty);
1497 break;
1498 #if 0 /* More line does not work for "show ip bgp". */
1499 case '\n':
1500 case '\r':
1501 vty->status = VTY_MORELINE;
1502 break;
1503 #endif
1504 default:
1505 break;
1506 }
1507 continue;
1508 }
1509
1510 /* Escape character. */
1511 if (vty->escape == VTY_ESCAPE) {
1512 vty_escape_map(buf[i], vty);
1513 continue;
1514 }
1515
1516 /* Pre-escape status. */
1517 if (vty->escape == VTY_PRE_ESCAPE) {
1518 switch (buf[i]) {
1519 case '[':
1520 vty->escape = VTY_ESCAPE;
1521 break;
1522 case 'b':
1523 vty_backward_word(vty);
1524 vty->escape = VTY_NORMAL;
1525 break;
1526 case 'f':
1527 vty_forward_word(vty);
1528 vty->escape = VTY_NORMAL;
1529 break;
1530 case 'd':
1531 vty_forward_kill_word(vty);
1532 vty->escape = VTY_NORMAL;
1533 break;
1534 case CONTROL('H'):
1535 case 0x7f:
1536 vty_backward_kill_word(vty);
1537 vty->escape = VTY_NORMAL;
1538 break;
1539 default:
1540 vty->escape = VTY_NORMAL;
1541 break;
1542 }
1543 continue;
1544 }
1545
1546 switch (buf[i]) {
1547 case CONTROL('A'):
1548 vty_beginning_of_line(vty);
1549 break;
1550 case CONTROL('B'):
1551 vty_backward_char(vty);
1552 break;
1553 case CONTROL('C'):
1554 vty_stop_input(vty);
1555 break;
1556 case CONTROL('D'):
1557 vty_delete_char(vty);
1558 break;
1559 case CONTROL('E'):
1560 vty_end_of_line(vty);
1561 break;
1562 case CONTROL('F'):
1563 vty_forward_char(vty);
1564 break;
1565 case CONTROL('H'):
1566 case 0x7f:
1567 vty_delete_backward_char(vty);
1568 break;
1569 case CONTROL('K'):
1570 vty_kill_line(vty);
1571 break;
1572 case CONTROL('N'):
1573 vty_next_line(vty);
1574 break;
1575 case CONTROL('P'):
1576 vty_previous_line(vty);
1577 break;
1578 case CONTROL('T'):
1579 vty_transpose_chars(vty);
1580 break;
1581 case CONTROL('U'):
1582 vty_kill_line_from_beginning(vty);
1583 break;
1584 case CONTROL('W'):
1585 vty_backward_kill_word(vty);
1586 break;
1587 case CONTROL('Z'):
1588 vty_end_config(vty);
1589 break;
1590 case '\n':
1591 case '\r':
1592 vty_out(vty, "\n");
1593 vty_execute(vty);
1594 break;
1595 case '\t':
1596 vty_complete_command(vty);
1597 break;
1598 case '?':
1599 if (vty->node == AUTH_NODE
1600 || vty->node == AUTH_ENABLE_NODE)
1601 vty_self_insert(vty, buf[i]);
1602 else
1603 vty_describe_command(vty);
1604 break;
1605 case '\033':
1606 if (i + 1 < nbytes && buf[i + 1] == '[') {
1607 vty->escape = VTY_ESCAPE;
1608 i++;
1609 } else
1610 vty->escape = VTY_PRE_ESCAPE;
1611 break;
1612 default:
1613 if (buf[i] > 31 && buf[i] < 127)
1614 vty_self_insert(vty, buf[i]);
1615 break;
1616 }
1617 }
1618
1619 /* Check status. */
1620 if (vty->status == VTY_CLOSE)
1621 vty_close(vty);
1622 else {
1623 vty_event(VTY_WRITE, vty->wfd, vty);
1624 vty_event(VTY_READ, vty_sock, vty);
1625 }
1626 return 0;
1627 }
1628
1629 /* Flush buffer to the vty. */
1630 static int vty_flush(struct thread *thread)
1631 {
1632 int erase;
1633 buffer_status_t flushrc;
1634 int vty_sock = THREAD_FD(thread);
1635 struct vty *vty = THREAD_ARG(thread);
1636
1637 vty->t_write = NULL;
1638
1639 /* Tempolary disable read thread. */
1640 if ((vty->lines == 0) && vty->t_read) {
1641 thread_cancel(vty->t_read);
1642 vty->t_read = NULL;
1643 }
1644
1645 /* Function execution continue. */
1646 erase = ((vty->status == VTY_MORE || vty->status == VTY_MORELINE));
1647
1648 /* N.B. if width is 0, that means we don't know the window size. */
1649 if ((vty->lines == 0) || (vty->width == 0) || (vty->height == 0))
1650 flushrc = buffer_flush_available(vty->obuf, vty_sock);
1651 else if (vty->status == VTY_MORELINE)
1652 flushrc = buffer_flush_window(vty->obuf, vty_sock, vty->width,
1653 1, erase, 0);
1654 else
1655 flushrc = buffer_flush_window(
1656 vty->obuf, vty_sock, vty->width,
1657 vty->lines >= 0 ? vty->lines : vty->height, erase, 0);
1658 switch (flushrc) {
1659 case BUFFER_ERROR:
1660 vty->monitor =
1661 0; /* disable monitoring to avoid infinite recursion */
1662 zlog_info("buffer_flush failed on vty client fd %d, closing",
1663 vty->fd);
1664 buffer_reset(vty->lbuf);
1665 buffer_reset(vty->obuf);
1666 vty_close(vty);
1667 return 0;
1668 case BUFFER_EMPTY:
1669 if (vty->status == VTY_CLOSE)
1670 vty_close(vty);
1671 else {
1672 vty->status = VTY_NORMAL;
1673 if (vty->lines == 0)
1674 vty_event(VTY_READ, vty_sock, vty);
1675 }
1676 break;
1677 case BUFFER_PENDING:
1678 /* There is more data waiting to be written. */
1679 vty->status = VTY_MORE;
1680 if (vty->lines == 0)
1681 vty_event(VTY_WRITE, vty_sock, vty);
1682 break;
1683 }
1684
1685 return 0;
1686 }
1687
1688 /* Allocate new vty struct. */
1689 struct vty *vty_new()
1690 {
1691 struct vty *new = XCALLOC(MTYPE_VTY, sizeof(struct vty));
1692
1693 new->fd = new->wfd = -1;
1694 new->of = stdout;
1695 new->lbuf = buffer_new(0);
1696 new->obuf = buffer_new(0); /* Use default buffer size. */
1697 new->buf = XCALLOC(MTYPE_VTY, VTY_BUFSIZ);
1698 new->error_buf = XCALLOC(MTYPE_VTY, VTY_BUFSIZ);
1699 new->max = VTY_BUFSIZ;
1700
1701 return new;
1702 }
1703
1704
1705 /* allocate and initialise vty */
1706 static struct vty *vty_new_init(int vty_sock)
1707 {
1708 struct vty *vty;
1709
1710 vty = vty_new();
1711 vty->fd = vty_sock;
1712 vty->wfd = vty_sock;
1713 vty->type = VTY_TERM;
1714 vty->node = AUTH_NODE;
1715 vty->fail = 0;
1716 vty->cp = 0;
1717 vty_clear_buf(vty);
1718 vty->length = 0;
1719 memset(vty->hist, 0, sizeof(vty->hist));
1720 vty->hp = 0;
1721 vty->hindex = 0;
1722 vector_set_index(vtyvec, vty_sock, vty);
1723 vty->status = VTY_NORMAL;
1724 vty->lines = -1;
1725 vty->iac = 0;
1726 vty->iac_sb_in_progress = 0;
1727 vty->sb_len = 0;
1728
1729 return vty;
1730 }
1731
1732 /* Create new vty structure. */
1733 static struct vty *vty_create(int vty_sock, union sockunion *su)
1734 {
1735 char buf[SU_ADDRSTRLEN];
1736 struct vty *vty;
1737
1738 sockunion2str(su, buf, SU_ADDRSTRLEN);
1739
1740 /* Allocate new vty structure and set up default values. */
1741 vty = vty_new_init(vty_sock);
1742
1743 /* configurable parameters not part of basic init */
1744 vty->v_timeout = vty_timeout_val;
1745 strcpy(vty->address, buf);
1746 if (no_password_check) {
1747 if (host.advanced)
1748 vty->node = ENABLE_NODE;
1749 else
1750 vty->node = VIEW_NODE;
1751 }
1752 if (host.lines >= 0)
1753 vty->lines = host.lines;
1754
1755 if (!no_password_check) {
1756 /* Vty is not available if password isn't set. */
1757 if (host.password == NULL && host.password_encrypt == NULL) {
1758 vty_out(vty, "Vty password is not set.\n");
1759 vty->status = VTY_CLOSE;
1760 vty_close(vty);
1761 return NULL;
1762 }
1763 }
1764
1765 /* Say hello to the world. */
1766 vty_hello(vty);
1767 if (!no_password_check)
1768 vty_out(vty, "\nUser Access Verification\n\n");
1769
1770 /* Setting up terminal. */
1771 vty_will_echo(vty);
1772 vty_will_suppress_go_ahead(vty);
1773
1774 vty_dont_linemode(vty);
1775 vty_do_window_size(vty);
1776 /* vty_dont_lflow_ahead (vty); */
1777
1778 vty_prompt(vty);
1779
1780 /* Add read/write thread. */
1781 vty_event(VTY_WRITE, vty_sock, vty);
1782 vty_event(VTY_READ, vty_sock, vty);
1783
1784 return vty;
1785 }
1786
1787 /* create vty for stdio */
1788 static struct termios stdio_orig_termios;
1789 static struct vty *stdio_vty = NULL;
1790 static bool stdio_termios = false;
1791 static void (*stdio_vty_atclose)(int isexit);
1792
1793 static void vty_stdio_reset(int isexit)
1794 {
1795 if (stdio_vty) {
1796 if (stdio_termios)
1797 tcsetattr(0, TCSANOW, &stdio_orig_termios);
1798 stdio_termios = false;
1799
1800 stdio_vty = NULL;
1801
1802 if (stdio_vty_atclose)
1803 stdio_vty_atclose(isexit);
1804 stdio_vty_atclose = NULL;
1805 }
1806 }
1807
1808 static void vty_stdio_atexit(void)
1809 {
1810 vty_stdio_reset(1);
1811 }
1812
1813 void vty_stdio_suspend(void)
1814 {
1815 if (!stdio_vty)
1816 return;
1817
1818 if (stdio_vty->t_write)
1819 thread_cancel(stdio_vty->t_write);
1820 if (stdio_vty->t_read)
1821 thread_cancel(stdio_vty->t_read);
1822 if (stdio_vty->t_timeout)
1823 thread_cancel(stdio_vty->t_timeout);
1824
1825 if (stdio_termios)
1826 tcsetattr(0, TCSANOW, &stdio_orig_termios);
1827 stdio_termios = false;
1828 }
1829
1830 void vty_stdio_resume(void)
1831 {
1832 if (!stdio_vty)
1833 return;
1834
1835 if (!tcgetattr(0, &stdio_orig_termios)) {
1836 struct termios termios;
1837
1838 termios = stdio_orig_termios;
1839 termios.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP | INLCR
1840 | IGNCR | ICRNL | IXON);
1841 termios.c_oflag &= ~OPOST;
1842 termios.c_lflag &= ~(ECHO | ECHONL | ICANON | IEXTEN);
1843 termios.c_cflag &= ~(CSIZE | PARENB);
1844 termios.c_cflag |= CS8;
1845 tcsetattr(0, TCSANOW, &termios);
1846 stdio_termios = true;
1847 }
1848
1849 vty_prompt(stdio_vty);
1850
1851 /* Add read/write thread. */
1852 vty_event(VTY_WRITE, 1, stdio_vty);
1853 vty_event(VTY_READ, 0, stdio_vty);
1854 }
1855
1856 void vty_stdio_close(void)
1857 {
1858 if (!stdio_vty)
1859 return;
1860 vty_close(stdio_vty);
1861 }
1862
1863 struct vty *vty_stdio(void (*atclose)(int isexit))
1864 {
1865 struct vty *vty;
1866
1867 /* refuse creating two vtys on stdio */
1868 if (stdio_vty)
1869 return NULL;
1870
1871 vty = stdio_vty = vty_new_init(0);
1872 stdio_vty_atclose = atclose;
1873 vty->wfd = 1;
1874
1875 /* always have stdio vty in a known _unchangeable_ state, don't want
1876 * config
1877 * to have any effect here to make sure scripting this works as intended
1878 */
1879 vty->node = ENABLE_NODE;
1880 vty->v_timeout = 0;
1881 strcpy(vty->address, "console");
1882
1883 vty_stdio_resume();
1884 return vty;
1885 }
1886
1887 /* Accept connection from the network. */
1888 static int vty_accept(struct thread *thread)
1889 {
1890 int vty_sock;
1891 union sockunion su;
1892 int ret;
1893 unsigned int on;
1894 int accept_sock;
1895 struct prefix p;
1896 struct access_list *acl = NULL;
1897 char buf[SU_ADDRSTRLEN];
1898
1899 accept_sock = THREAD_FD(thread);
1900
1901 /* We continue hearing vty socket. */
1902 vty_event(VTY_SERV, accept_sock, NULL);
1903
1904 memset(&su, 0, sizeof(union sockunion));
1905
1906 /* We can handle IPv4 or IPv6 socket. */
1907 vty_sock = sockunion_accept(accept_sock, &su);
1908 if (vty_sock < 0) {
1909 flog_err(EC_LIB_SOCKET, "can't accept vty socket : %s",
1910 safe_strerror(errno));
1911 return -1;
1912 }
1913 set_nonblocking(vty_sock);
1914 set_cloexec(vty_sock);
1915
1916 sockunion2hostprefix(&su, &p);
1917
1918 /* VTY's accesslist apply. */
1919 if (p.family == AF_INET && vty_accesslist_name) {
1920 if ((acl = access_list_lookup(AFI_IP, vty_accesslist_name))
1921 && (access_list_apply(acl, &p) == FILTER_DENY)) {
1922 zlog_info("Vty connection refused from %s",
1923 sockunion2str(&su, buf, SU_ADDRSTRLEN));
1924 close(vty_sock);
1925
1926 /* continue accepting connections */
1927 vty_event(VTY_SERV, accept_sock, NULL);
1928
1929 return 0;
1930 }
1931 }
1932
1933 /* VTY's ipv6 accesslist apply. */
1934 if (p.family == AF_INET6 && vty_ipv6_accesslist_name) {
1935 if ((acl = access_list_lookup(AFI_IP6,
1936 vty_ipv6_accesslist_name))
1937 && (access_list_apply(acl, &p) == FILTER_DENY)) {
1938 zlog_info("Vty connection refused from %s",
1939 sockunion2str(&su, buf, SU_ADDRSTRLEN));
1940 close(vty_sock);
1941
1942 /* continue accepting connections */
1943 vty_event(VTY_SERV, accept_sock, NULL);
1944
1945 return 0;
1946 }
1947 }
1948
1949 on = 1;
1950 ret = setsockopt(vty_sock, IPPROTO_TCP, TCP_NODELAY, (char *)&on,
1951 sizeof(on));
1952 if (ret < 0)
1953 zlog_info("can't set sockopt to vty_sock : %s",
1954 safe_strerror(errno));
1955
1956 zlog_info("Vty connection from %s",
1957 sockunion2str(&su, buf, SU_ADDRSTRLEN));
1958
1959 vty_create(vty_sock, &su);
1960
1961 return 0;
1962 }
1963
1964 static void vty_serv_sock_addrinfo(const char *hostname, unsigned short port)
1965 {
1966 int ret;
1967 struct addrinfo req;
1968 struct addrinfo *ainfo;
1969 struct addrinfo *ainfo_save;
1970 int sock;
1971 char port_str[BUFSIZ];
1972
1973 memset(&req, 0, sizeof(struct addrinfo));
1974 req.ai_flags = AI_PASSIVE;
1975 req.ai_family = AF_UNSPEC;
1976 req.ai_socktype = SOCK_STREAM;
1977 sprintf(port_str, "%d", port);
1978 port_str[sizeof(port_str) - 1] = '\0';
1979
1980 ret = getaddrinfo(hostname, port_str, &req, &ainfo);
1981
1982 if (ret != 0) {
1983 flog_err_sys(EC_LIB_SYSTEM_CALL, "getaddrinfo failed: %s",
1984 gai_strerror(ret));
1985 exit(1);
1986 }
1987
1988 ainfo_save = ainfo;
1989
1990 do {
1991 if (ainfo->ai_family != AF_INET && ainfo->ai_family != AF_INET6)
1992 continue;
1993
1994 sock = socket(ainfo->ai_family, ainfo->ai_socktype,
1995 ainfo->ai_protocol);
1996 if (sock < 0)
1997 continue;
1998
1999 sockopt_v6only(ainfo->ai_family, sock);
2000 sockopt_reuseaddr(sock);
2001 sockopt_reuseport(sock);
2002 set_cloexec(sock);
2003
2004 ret = bind(sock, ainfo->ai_addr, ainfo->ai_addrlen);
2005 if (ret < 0) {
2006 close(sock); /* Avoid sd leak. */
2007 continue;
2008 }
2009
2010 ret = listen(sock, 3);
2011 if (ret < 0) {
2012 close(sock); /* Avoid sd leak. */
2013 continue;
2014 }
2015
2016 vty_event(VTY_SERV, sock, NULL);
2017 } while ((ainfo = ainfo->ai_next) != NULL);
2018
2019 freeaddrinfo(ainfo_save);
2020 }
2021
2022 #ifdef VTYSH
2023 /* For sockaddr_un. */
2024 #include <sys/un.h>
2025
2026 /* VTY shell UNIX domain socket. */
2027 static void vty_serv_un(const char *path)
2028 {
2029 int ret;
2030 int sock, len;
2031 struct sockaddr_un serv;
2032 mode_t old_mask;
2033 struct zprivs_ids_t ids;
2034
2035 /* First of all, unlink existing socket */
2036 unlink(path);
2037
2038 /* Set umask */
2039 old_mask = umask(0007);
2040
2041 /* Make UNIX domain socket. */
2042 sock = socket(AF_UNIX, SOCK_STREAM, 0);
2043 if (sock < 0) {
2044 flog_err_sys(EC_LIB_SOCKET,
2045 "Cannot create unix stream socket: %s",
2046 safe_strerror(errno));
2047 return;
2048 }
2049
2050 /* Make server socket. */
2051 memset(&serv, 0, sizeof(struct sockaddr_un));
2052 serv.sun_family = AF_UNIX;
2053 strlcpy(serv.sun_path, path, sizeof(serv.sun_path));
2054 #ifdef HAVE_STRUCT_SOCKADDR_UN_SUN_LEN
2055 len = serv.sun_len = SUN_LEN(&serv);
2056 #else
2057 len = sizeof(serv.sun_family) + strlen(serv.sun_path);
2058 #endif /* HAVE_STRUCT_SOCKADDR_UN_SUN_LEN */
2059
2060 set_cloexec(sock);
2061
2062 ret = bind(sock, (struct sockaddr *)&serv, len);
2063 if (ret < 0) {
2064 flog_err_sys(EC_LIB_SOCKET, "Cannot bind path %s: %s", path,
2065 safe_strerror(errno));
2066 close(sock); /* Avoid sd leak. */
2067 return;
2068 }
2069
2070 ret = listen(sock, 5);
2071 if (ret < 0) {
2072 flog_err_sys(EC_LIB_SOCKET, "listen(fd %d) failed: %s", sock,
2073 safe_strerror(errno));
2074 close(sock); /* Avoid sd leak. */
2075 return;
2076 }
2077
2078 umask(old_mask);
2079
2080 zprivs_get_ids(&ids);
2081
2082 /* Hack: ids.gid_vty is actually a uint, but we stored -1 in it
2083 earlier for the case when we don't need to chown the file
2084 type casting it here to make a compare */
2085 if ((int)ids.gid_vty > 0) {
2086 /* set group of socket */
2087 if (chown(path, -1, ids.gid_vty)) {
2088 flog_err_sys(EC_LIB_SYSTEM_CALL,
2089 "vty_serv_un: could chown socket, %s",
2090 safe_strerror(errno));
2091 }
2092 }
2093
2094 vty_event(VTYSH_SERV, sock, NULL);
2095 }
2096
2097 /* #define VTYSH_DEBUG 1 */
2098
2099 static int vtysh_accept(struct thread *thread)
2100 {
2101 int accept_sock;
2102 int sock;
2103 int client_len;
2104 struct sockaddr_un client;
2105 struct vty *vty;
2106
2107 accept_sock = THREAD_FD(thread);
2108
2109 vty_event(VTYSH_SERV, accept_sock, NULL);
2110
2111 memset(&client, 0, sizeof(struct sockaddr_un));
2112 client_len = sizeof(struct sockaddr_un);
2113
2114 sock = accept(accept_sock, (struct sockaddr *)&client,
2115 (socklen_t *)&client_len);
2116
2117 if (sock < 0) {
2118 flog_err(EC_LIB_SOCKET, "can't accept vty socket : %s",
2119 safe_strerror(errno));
2120 return -1;
2121 }
2122
2123 if (set_nonblocking(sock) < 0) {
2124 flog_err(
2125 EC_LIB_SOCKET,
2126 "vtysh_accept: could not set vty socket %d to non-blocking, %s, closing",
2127 sock, safe_strerror(errno));
2128 close(sock);
2129 return -1;
2130 }
2131 set_cloexec(sock);
2132
2133 #ifdef VTYSH_DEBUG
2134 printf("VTY shell accept\n");
2135 #endif /* VTYSH_DEBUG */
2136
2137 vty = vty_new();
2138 vty->fd = sock;
2139 vty->wfd = sock;
2140 vty->type = VTY_SHELL_SERV;
2141 vty->node = VIEW_NODE;
2142
2143 vty_event(VTYSH_READ, sock, vty);
2144
2145 return 0;
2146 }
2147
2148 static int vtysh_flush(struct vty *vty)
2149 {
2150 switch (buffer_flush_available(vty->obuf, vty->wfd)) {
2151 case BUFFER_PENDING:
2152 vty_event(VTYSH_WRITE, vty->wfd, vty);
2153 break;
2154 case BUFFER_ERROR:
2155 vty->monitor =
2156 0; /* disable monitoring to avoid infinite recursion */
2157 flog_err(EC_LIB_SOCKET, "%s: write error to fd %d, closing",
2158 __func__, vty->fd);
2159 buffer_reset(vty->lbuf);
2160 buffer_reset(vty->obuf);
2161 vty_close(vty);
2162 return -1;
2163 break;
2164 case BUFFER_EMPTY:
2165 break;
2166 }
2167 return 0;
2168 }
2169
2170 static int vtysh_read(struct thread *thread)
2171 {
2172 int ret;
2173 int sock;
2174 int nbytes;
2175 struct vty *vty;
2176 unsigned char buf[VTY_READ_BUFSIZ];
2177 unsigned char *p;
2178 uint8_t header[4] = {0, 0, 0, 0};
2179
2180 sock = THREAD_FD(thread);
2181 vty = THREAD_ARG(thread);
2182 vty->t_read = NULL;
2183
2184 if ((nbytes = read(sock, buf, VTY_READ_BUFSIZ)) <= 0) {
2185 if (nbytes < 0) {
2186 if (ERRNO_IO_RETRY(errno)) {
2187 vty_event(VTYSH_READ, sock, vty);
2188 return 0;
2189 }
2190 vty->monitor = 0; /* disable monitoring to avoid
2191 infinite recursion */
2192 flog_err(
2193 EC_LIB_SOCKET,
2194 "%s: read failed on vtysh client fd %d, closing: %s",
2195 __func__, sock, safe_strerror(errno));
2196 }
2197 buffer_reset(vty->lbuf);
2198 buffer_reset(vty->obuf);
2199 vty_close(vty);
2200 #ifdef VTYSH_DEBUG
2201 printf("close vtysh\n");
2202 #endif /* VTYSH_DEBUG */
2203 return 0;
2204 }
2205
2206 #ifdef VTYSH_DEBUG
2207 printf("line: %.*s\n", nbytes, buf);
2208 #endif /* VTYSH_DEBUG */
2209
2210 if (vty->length + nbytes >= VTY_BUFSIZ) {
2211 /* Clear command line buffer. */
2212 vty->cp = vty->length = 0;
2213 vty_clear_buf(vty);
2214 vty_out(vty, "%% Command is too long.\n");
2215 } else {
2216 for (p = buf; p < buf + nbytes; p++) {
2217 vty->buf[vty->length++] = *p;
2218 if (*p == '\0') {
2219 /* Pass this line to parser. */
2220 ret = vty_execute(vty);
2221 /* Note that vty_execute clears the command buffer and resets
2222 vty->length to 0. */
2223
2224 /* Return result. */
2225 #ifdef VTYSH_DEBUG
2226 printf("result: %d\n", ret);
2227 printf("vtysh node: %d\n", vty->node);
2228 #endif /* VTYSH_DEBUG */
2229
2230 /* hack for asynchronous "write integrated"
2231 * - other commands in "buf" will be ditched
2232 * - input during pending config-write is
2233 * "unsupported" */
2234 if (ret == CMD_SUSPEND)
2235 break;
2236
2237 /* warning: watchfrr hardcodes this result write
2238 */
2239 header[3] = ret;
2240 buffer_put(vty->obuf, header, 4);
2241
2242 if (!vty->t_write && (vtysh_flush(vty) < 0))
2243 /* Try to flush results; exit if a write
2244 * error occurs. */
2245 return 0;
2246 }
2247 }
2248 }
2249
2250 if (vty->status == VTY_CLOSE)
2251 vty_close(vty);
2252 else
2253 vty_event(VTYSH_READ, sock, vty);
2254
2255 return 0;
2256 }
2257
2258 static int vtysh_write(struct thread *thread)
2259 {
2260 struct vty *vty = THREAD_ARG(thread);
2261
2262 vty->t_write = NULL;
2263 vtysh_flush(vty);
2264 return 0;
2265 }
2266
2267 #endif /* VTYSH */
2268
2269 /* Determine address family to bind. */
2270 void vty_serv_sock(const char *addr, unsigned short port, const char *path)
2271 {
2272 /* If port is set to 0, do not listen on TCP/IP at all! */
2273 if (port)
2274 vty_serv_sock_addrinfo(addr, port);
2275
2276 #ifdef VTYSH
2277 vty_serv_un(path);
2278 #endif /* VTYSH */
2279 }
2280
2281 /* Close vty interface. Warning: call this only from functions that
2282 will be careful not to access the vty afterwards (since it has
2283 now been freed). This is safest from top-level functions (called
2284 directly by the thread dispatcher). */
2285 void vty_close(struct vty *vty)
2286 {
2287 int i;
2288 bool was_stdio = false;
2289
2290 /* Cancel threads.*/
2291 if (vty->t_read)
2292 thread_cancel(vty->t_read);
2293 if (vty->t_write)
2294 thread_cancel(vty->t_write);
2295 if (vty->t_timeout)
2296 thread_cancel(vty->t_timeout);
2297
2298 /* Flush buffer. */
2299 buffer_flush_all(vty->obuf, vty->wfd);
2300
2301 /* Free input buffer. */
2302 buffer_free(vty->obuf);
2303 buffer_free(vty->lbuf);
2304
2305 /* Free command history. */
2306 for (i = 0; i < VTY_MAXHIST; i++)
2307 if (vty->hist[i])
2308 XFREE(MTYPE_VTY_HIST, vty->hist[i]);
2309
2310 /* Unset vector. */
2311 if (vty->fd != -1)
2312 vector_unset(vtyvec, vty->fd);
2313
2314 if (vty->wfd > 0 && vty->type == VTY_FILE)
2315 fsync(vty->wfd);
2316
2317 /* Close socket.
2318 * note check is for fd > STDERR_FILENO, not fd != -1.
2319 * We never close stdin/stdout/stderr here, because we may be
2320 * running in foreground mode with logging to stdout. Also,
2321 * additionally, we'd need to replace these fds with /dev/null. */
2322 if (vty->wfd > STDERR_FILENO && vty->wfd != vty->fd)
2323 close(vty->wfd);
2324 if (vty->fd > STDERR_FILENO)
2325 close(vty->fd);
2326 if (vty->fd == STDIN_FILENO)
2327 was_stdio = true;
2328
2329 if (vty->buf)
2330 XFREE(MTYPE_VTY, vty->buf);
2331
2332 if (vty->error_buf)
2333 XFREE(MTYPE_VTY, vty->error_buf);
2334
2335 /* Check configure. */
2336 vty_config_unlock(vty);
2337
2338 /* OK free vty. */
2339 XFREE(MTYPE_VTY, vty);
2340
2341 if (was_stdio)
2342 vty_stdio_reset(0);
2343 }
2344
2345 /* When time out occur output message then close connection. */
2346 static int vty_timeout(struct thread *thread)
2347 {
2348 struct vty *vty;
2349
2350 vty = THREAD_ARG(thread);
2351 vty->t_timeout = NULL;
2352 vty->v_timeout = 0;
2353
2354 /* Clear buffer*/
2355 buffer_reset(vty->lbuf);
2356 buffer_reset(vty->obuf);
2357 vty_out(vty, "\nVty connection is timed out.\n");
2358
2359 /* Close connection. */
2360 vty->status = VTY_CLOSE;
2361 vty_close(vty);
2362
2363 return 0;
2364 }
2365
2366 /* Read up configuration file from file_name. */
2367 static void vty_read_file(FILE *confp)
2368 {
2369 int ret;
2370 struct vty *vty;
2371 unsigned int line_num = 0;
2372
2373 vty = vty_new();
2374 /* vty_close won't close stderr; if some config command prints
2375 * something it'll end up there. (not ideal; it'd be beter if output
2376 * from a file-load went to logging instead. Also note that if this
2377 * function is called after daemonizing, stderr will be /dev/null.)
2378 *
2379 * vty->fd will be -1 from vty_new()
2380 */
2381 vty->wfd = STDERR_FILENO;
2382 vty->type = VTY_FILE;
2383 vty->node = CONFIG_NODE;
2384
2385 /* Execute configuration file */
2386 ret = config_from_file(vty, confp, &line_num);
2387
2388 /* Flush any previous errors before printing messages below */
2389 buffer_flush_all(vty->obuf, vty->wfd);
2390
2391 if (!((ret == CMD_SUCCESS) || (ret == CMD_ERR_NOTHING_TODO))) {
2392 const char *message = NULL;
2393 char *nl;
2394
2395 switch (ret) {
2396 case CMD_ERR_AMBIGUOUS:
2397 message = "Ambiguous command";
2398 break;
2399 case CMD_ERR_NO_MATCH:
2400 message = "No such command";
2401 break;
2402 case CMD_WARNING:
2403 message = "Command returned Warning";
2404 break;
2405 case CMD_WARNING_CONFIG_FAILED:
2406 message = "Command returned Warning Config Failed";
2407 break;
2408 case CMD_ERR_INCOMPLETE:
2409 message = "Command returned Incomplete";
2410 break;
2411 case CMD_ERR_EXEED_ARGC_MAX:
2412 message =
2413 "Command exceeded maximum number of Arguments";
2414 break;
2415 default:
2416 message = "Command returned unhandled error message";
2417 break;
2418 }
2419
2420 nl = strchr(vty->error_buf, '\n');
2421 if (nl)
2422 *nl = '\0';
2423 flog_err(EC_LIB_VTY, "ERROR: %s on config line %u: %s", message,
2424 line_num, vty->error_buf);
2425 }
2426
2427 vty_close(vty);
2428 }
2429
2430 static FILE *vty_use_backup_config(const char *fullpath)
2431 {
2432 char *fullpath_sav, *fullpath_tmp;
2433 FILE *ret = NULL;
2434 int tmp, sav;
2435 int c;
2436 char buffer[512];
2437
2438 fullpath_sav = malloc(strlen(fullpath) + strlen(CONF_BACKUP_EXT) + 1);
2439 strcpy(fullpath_sav, fullpath);
2440 strcat(fullpath_sav, CONF_BACKUP_EXT);
2441
2442 sav = open(fullpath_sav, O_RDONLY);
2443 if (sav < 0) {
2444 free(fullpath_sav);
2445 return NULL;
2446 }
2447
2448 fullpath_tmp = malloc(strlen(fullpath) + 8);
2449 sprintf(fullpath_tmp, "%s.XXXXXX", fullpath);
2450
2451 /* Open file to configuration write. */
2452 tmp = mkstemp(fullpath_tmp);
2453 if (tmp < 0)
2454 goto out_close_sav;
2455
2456 if (fchmod(tmp, CONFIGFILE_MASK) != 0)
2457 goto out_close;
2458
2459 while ((c = read(sav, buffer, 512)) > 0) {
2460 if (write(tmp, buffer, c) <= 0)
2461 goto out_close;
2462 }
2463 close(sav);
2464 close(tmp);
2465
2466 if (rename(fullpath_tmp, fullpath) == 0)
2467 ret = fopen(fullpath, "r");
2468 else
2469 unlink(fullpath_tmp);
2470
2471 if (0) {
2472 out_close:
2473 close(tmp);
2474 unlink(fullpath_tmp);
2475 out_close_sav:
2476 close(sav);
2477 }
2478
2479 free(fullpath_sav);
2480 free(fullpath_tmp);
2481 return ret;
2482 }
2483
2484 /* Read up configuration file from file_name. */
2485 bool vty_read_config(const char *config_file, char *config_default_dir)
2486 {
2487 char cwd[MAXPATHLEN];
2488 FILE *confp = NULL;
2489 const char *fullpath;
2490 char *tmp = NULL;
2491 bool read_success = false;
2492
2493 /* If -f flag specified. */
2494 if (config_file != NULL) {
2495 if (!IS_DIRECTORY_SEP(config_file[0])) {
2496 if (getcwd(cwd, MAXPATHLEN) == NULL) {
2497 flog_err_sys(
2498 EC_LIB_SYSTEM_CALL,
2499 "Failure to determine Current Working Directory %d!",
2500 errno);
2501 exit(1);
2502 }
2503 tmp = XMALLOC(MTYPE_TMP,
2504 strlen(cwd) + strlen(config_file) + 2);
2505 sprintf(tmp, "%s/%s", cwd, config_file);
2506 fullpath = tmp;
2507 } else
2508 fullpath = config_file;
2509
2510 confp = fopen(fullpath, "r");
2511
2512 if (confp == NULL) {
2513 flog_warn(
2514 EC_LIB_BACKUP_CONFIG,
2515 "%s: failed to open configuration file %s: %s, checking backup",
2516 __func__, fullpath, safe_strerror(errno));
2517
2518 confp = vty_use_backup_config(fullpath);
2519 if (confp)
2520 flog_warn(
2521 EC_LIB_BACKUP_CONFIG,
2522 "WARNING: using backup configuration file!");
2523 else {
2524 flog_err(EC_LIB_VTY,
2525 "can't open configuration file [%s]",
2526 config_file);
2527 exit(1);
2528 }
2529 }
2530 } else {
2531
2532 host_config_set(config_default_dir);
2533
2534 #ifdef VTYSH
2535 int ret;
2536 struct stat conf_stat;
2537
2538 /* !!!!PLEASE LEAVE!!!!
2539 * This is NEEDED for use with vtysh -b, or else you can get
2540 * a real configuration food fight with a lot garbage in the
2541 * merged configuration file it creates coming from the per
2542 * daemon configuration files. This also allows the daemons
2543 * to start if there default configuration file is not
2544 * present or ignore them, as needed when using vtysh -b to
2545 * configure the daemons at boot - MAG
2546 */
2547
2548 /* Stat for vtysh Zebra.conf, if found startup and wait for
2549 * boot configuration
2550 */
2551
2552 if (strstr(config_default_dir, "vtysh") == NULL) {
2553 ret = stat(integrate_default, &conf_stat);
2554 if (ret >= 0) {
2555 read_success = true;
2556 goto tmp_free_and_out;
2557 }
2558 }
2559 #endif /* VTYSH */
2560 confp = fopen(config_default_dir, "r");
2561 if (confp == NULL) {
2562 flog_err(
2563 EC_LIB_SYSTEM_CALL,
2564 "%s: failed to open configuration file %s: %s, checking backup",
2565 __func__, config_default_dir,
2566 safe_strerror(errno));
2567
2568 confp = vty_use_backup_config(config_default_dir);
2569 if (confp) {
2570 flog_warn(
2571 EC_LIB_BACKUP_CONFIG,
2572 "WARNING: using backup configuration file!");
2573 fullpath = config_default_dir;
2574 } else {
2575 flog_err(EC_LIB_VTY,
2576 "can't open configuration file [%s]",
2577 config_default_dir);
2578 goto tmp_free_and_out;
2579 }
2580 } else
2581 fullpath = config_default_dir;
2582 }
2583
2584 vty_read_file(confp);
2585 read_success = true;
2586
2587 fclose(confp);
2588
2589 host_config_set(fullpath);
2590
2591 tmp_free_and_out:
2592 if (tmp)
2593 XFREE(MTYPE_TMP, tmp);
2594
2595 return read_success;
2596 }
2597
2598 /* Small utility function which output log to the VTY. */
2599 void vty_log(const char *level, const char *proto_str, const char *format,
2600 struct timestamp_control *ctl, va_list va)
2601 {
2602 unsigned int i;
2603 struct vty *vty;
2604
2605 if (!vtyvec)
2606 return;
2607
2608 for (i = 0; i < vector_active(vtyvec); i++)
2609 if ((vty = vector_slot(vtyvec, i)) != NULL)
2610 if (vty->monitor) {
2611 va_list ac;
2612 va_copy(ac, va);
2613 vty_log_out(vty, level, proto_str, format, ctl,
2614 ac);
2615 va_end(ac);
2616 }
2617 }
2618
2619 /* Async-signal-safe version of vty_log for fixed strings. */
2620 void vty_log_fixed(char *buf, size_t len)
2621 {
2622 unsigned int i;
2623 struct iovec iov[2];
2624 char crlf[4] = "\r\n";
2625
2626 /* vty may not have been initialised */
2627 if (!vtyvec)
2628 return;
2629
2630 iov[0].iov_base = buf;
2631 iov[0].iov_len = len;
2632 iov[1].iov_base = crlf;
2633 iov[1].iov_len = 2;
2634
2635 for (i = 0; i < vector_active(vtyvec); i++) {
2636 struct vty *vty;
2637 if (((vty = vector_slot(vtyvec, i)) != NULL) && vty->monitor)
2638 /* N.B. We don't care about the return code, since
2639 process is
2640 most likely just about to die anyway. */
2641 if (writev(vty->wfd, iov, 2) == -1) {
2642 fprintf(stderr, "Failure to writev: %d\n",
2643 errno);
2644 exit(-1);
2645 }
2646 }
2647 }
2648
2649 int vty_config_lock(struct vty *vty)
2650 {
2651 if (vty_config_is_lockless)
2652 return 1;
2653 if (vty_config == 0) {
2654 vty->config = 1;
2655 vty_config = 1;
2656 }
2657 return vty->config;
2658 }
2659
2660 int vty_config_unlock(struct vty *vty)
2661 {
2662 if (vty_config_is_lockless)
2663 return 0;
2664 if (vty_config == 1 && vty->config == 1) {
2665 vty->config = 0;
2666 vty_config = 0;
2667 }
2668 return vty->config;
2669 }
2670
2671 void vty_config_lockless(void)
2672 {
2673 vty_config_is_lockless = 1;
2674 }
2675
2676 /* Master of the threads. */
2677 static struct thread_master *vty_master;
2678
2679 static void vty_event(enum event event, int sock, struct vty *vty)
2680 {
2681 struct thread *vty_serv_thread = NULL;
2682
2683 switch (event) {
2684 case VTY_SERV:
2685 vty_serv_thread = thread_add_read(vty_master, vty_accept, vty,
2686 sock, NULL);
2687 vector_set_index(Vvty_serv_thread, sock, vty_serv_thread);
2688 break;
2689 #ifdef VTYSH
2690 case VTYSH_SERV:
2691 vty_serv_thread = thread_add_read(vty_master, vtysh_accept, vty,
2692 sock, NULL);
2693 vector_set_index(Vvty_serv_thread, sock, vty_serv_thread);
2694 break;
2695 case VTYSH_READ:
2696 vty->t_read = NULL;
2697 thread_add_read(vty_master, vtysh_read, vty, sock,
2698 &vty->t_read);
2699 break;
2700 case VTYSH_WRITE:
2701 vty->t_write = NULL;
2702 thread_add_write(vty_master, vtysh_write, vty, sock,
2703 &vty->t_write);
2704 break;
2705 #endif /* VTYSH */
2706 case VTY_READ:
2707 vty->t_read = NULL;
2708 thread_add_read(vty_master, vty_read, vty, sock, &vty->t_read);
2709
2710 /* Time out treatment. */
2711 if (vty->v_timeout) {
2712 if (vty->t_timeout)
2713 thread_cancel(vty->t_timeout);
2714 vty->t_timeout = NULL;
2715 thread_add_timer(vty_master, vty_timeout, vty,
2716 vty->v_timeout, &vty->t_timeout);
2717 }
2718 break;
2719 case VTY_WRITE:
2720 thread_add_write(vty_master, vty_flush, vty, sock,
2721 &vty->t_write);
2722 break;
2723 case VTY_TIMEOUT_RESET:
2724 if (vty->t_timeout) {
2725 thread_cancel(vty->t_timeout);
2726 vty->t_timeout = NULL;
2727 }
2728 if (vty->v_timeout) {
2729 vty->t_timeout = NULL;
2730 thread_add_timer(vty_master, vty_timeout, vty,
2731 vty->v_timeout, &vty->t_timeout);
2732 }
2733 break;
2734 }
2735 }
2736
2737 DEFUN_NOSH (config_who,
2738 config_who_cmd,
2739 "who",
2740 "Display who is on vty\n")
2741 {
2742 unsigned int i;
2743 struct vty *v;
2744
2745 for (i = 0; i < vector_active(vtyvec); i++)
2746 if ((v = vector_slot(vtyvec, i)) != NULL)
2747 vty_out(vty, "%svty[%d] connected from %s.\n",
2748 v->config ? "*" : " ", i, v->address);
2749 return CMD_SUCCESS;
2750 }
2751
2752 /* Move to vty configuration mode. */
2753 DEFUN_NOSH (line_vty,
2754 line_vty_cmd,
2755 "line vty",
2756 "Configure a terminal line\n"
2757 "Virtual terminal\n")
2758 {
2759 vty->node = VTY_NODE;
2760 return CMD_SUCCESS;
2761 }
2762
2763 /* Set time out value. */
2764 static int exec_timeout(struct vty *vty, const char *min_str,
2765 const char *sec_str)
2766 {
2767 unsigned long timeout = 0;
2768
2769 /* min_str and sec_str are already checked by parser. So it must be
2770 all digit string. */
2771 if (min_str) {
2772 timeout = strtol(min_str, NULL, 10);
2773 timeout *= 60;
2774 }
2775 if (sec_str)
2776 timeout += strtol(sec_str, NULL, 10);
2777
2778 vty_timeout_val = timeout;
2779 vty->v_timeout = timeout;
2780 vty_event(VTY_TIMEOUT_RESET, 0, vty);
2781
2782
2783 return CMD_SUCCESS;
2784 }
2785
2786 DEFUN (exec_timeout_min,
2787 exec_timeout_min_cmd,
2788 "exec-timeout (0-35791)",
2789 "Set timeout value\n"
2790 "Timeout value in minutes\n")
2791 {
2792 int idx_number = 1;
2793 return exec_timeout(vty, argv[idx_number]->arg, NULL);
2794 }
2795
2796 DEFUN (exec_timeout_sec,
2797 exec_timeout_sec_cmd,
2798 "exec-timeout (0-35791) (0-2147483)",
2799 "Set the EXEC timeout\n"
2800 "Timeout in minutes\n"
2801 "Timeout in seconds\n")
2802 {
2803 int idx_number = 1;
2804 int idx_number_2 = 2;
2805 return exec_timeout(vty, argv[idx_number]->arg,
2806 argv[idx_number_2]->arg);
2807 }
2808
2809 DEFUN (no_exec_timeout,
2810 no_exec_timeout_cmd,
2811 "no exec-timeout",
2812 NO_STR
2813 "Set the EXEC timeout\n")
2814 {
2815 return exec_timeout(vty, NULL, NULL);
2816 }
2817
2818 /* Set vty access class. */
2819 DEFUN (vty_access_class,
2820 vty_access_class_cmd,
2821 "access-class WORD",
2822 "Filter connections based on an IP access list\n"
2823 "IP access list\n")
2824 {
2825 int idx_word = 1;
2826 if (vty_accesslist_name)
2827 XFREE(MTYPE_VTY, vty_accesslist_name);
2828
2829 vty_accesslist_name = XSTRDUP(MTYPE_VTY, argv[idx_word]->arg);
2830
2831 return CMD_SUCCESS;
2832 }
2833
2834 /* Clear vty access class. */
2835 DEFUN (no_vty_access_class,
2836 no_vty_access_class_cmd,
2837 "no access-class [WORD]",
2838 NO_STR
2839 "Filter connections based on an IP access list\n"
2840 "IP access list\n")
2841 {
2842 int idx_word = 2;
2843 const char *accesslist = (argc == 3) ? argv[idx_word]->arg : NULL;
2844 if (!vty_accesslist_name
2845 || (argc == 3 && strcmp(vty_accesslist_name, accesslist))) {
2846 vty_out(vty, "Access-class is not currently applied to vty\n");
2847 return CMD_WARNING_CONFIG_FAILED;
2848 }
2849
2850 XFREE(MTYPE_VTY, vty_accesslist_name);
2851
2852 vty_accesslist_name = NULL;
2853
2854 return CMD_SUCCESS;
2855 }
2856
2857 /* Set vty access class. */
2858 DEFUN (vty_ipv6_access_class,
2859 vty_ipv6_access_class_cmd,
2860 "ipv6 access-class WORD",
2861 IPV6_STR
2862 "Filter connections based on an IP access list\n"
2863 "IPv6 access list\n")
2864 {
2865 int idx_word = 2;
2866 if (vty_ipv6_accesslist_name)
2867 XFREE(MTYPE_VTY, vty_ipv6_accesslist_name);
2868
2869 vty_ipv6_accesslist_name = XSTRDUP(MTYPE_VTY, argv[idx_word]->arg);
2870
2871 return CMD_SUCCESS;
2872 }
2873
2874 /* Clear vty access class. */
2875 DEFUN (no_vty_ipv6_access_class,
2876 no_vty_ipv6_access_class_cmd,
2877 "no ipv6 access-class [WORD]",
2878 NO_STR
2879 IPV6_STR
2880 "Filter connections based on an IP access list\n"
2881 "IPv6 access list\n")
2882 {
2883 int idx_word = 3;
2884 const char *accesslist = (argc == 4) ? argv[idx_word]->arg : NULL;
2885
2886 if (!vty_ipv6_accesslist_name
2887 || (argc == 4 && strcmp(vty_ipv6_accesslist_name, accesslist))) {
2888 vty_out(vty,
2889 "IPv6 access-class is not currently applied to vty\n");
2890 return CMD_WARNING_CONFIG_FAILED;
2891 }
2892
2893 XFREE(MTYPE_VTY, vty_ipv6_accesslist_name);
2894
2895 vty_ipv6_accesslist_name = NULL;
2896
2897 return CMD_SUCCESS;
2898 }
2899
2900 /* vty login. */
2901 DEFUN (vty_login,
2902 vty_login_cmd,
2903 "login",
2904 "Enable password checking\n")
2905 {
2906 no_password_check = 0;
2907 return CMD_SUCCESS;
2908 }
2909
2910 DEFUN (no_vty_login,
2911 no_vty_login_cmd,
2912 "no login",
2913 NO_STR
2914 "Enable password checking\n")
2915 {
2916 no_password_check = 1;
2917 return CMD_SUCCESS;
2918 }
2919
2920 DEFUN (service_advanced_vty,
2921 service_advanced_vty_cmd,
2922 "service advanced-vty",
2923 "Set up miscellaneous service\n"
2924 "Enable advanced mode vty interface\n")
2925 {
2926 host.advanced = 1;
2927 return CMD_SUCCESS;
2928 }
2929
2930 DEFUN (no_service_advanced_vty,
2931 no_service_advanced_vty_cmd,
2932 "no service advanced-vty",
2933 NO_STR
2934 "Set up miscellaneous service\n"
2935 "Enable advanced mode vty interface\n")
2936 {
2937 host.advanced = 0;
2938 return CMD_SUCCESS;
2939 }
2940
2941 DEFUN_NOSH (terminal_monitor,
2942 terminal_monitor_cmd,
2943 "terminal monitor",
2944 "Set terminal line parameters\n"
2945 "Copy debug output to the current terminal line\n")
2946 {
2947 vty->monitor = 1;
2948 return CMD_SUCCESS;
2949 }
2950
2951 DEFUN_NOSH (terminal_no_monitor,
2952 terminal_no_monitor_cmd,
2953 "terminal no monitor",
2954 "Set terminal line parameters\n"
2955 NO_STR
2956 "Copy debug output to the current terminal line\n")
2957 {
2958 vty->monitor = 0;
2959 return CMD_SUCCESS;
2960 }
2961
2962 DEFUN_NOSH (no_terminal_monitor,
2963 no_terminal_monitor_cmd,
2964 "no terminal monitor",
2965 NO_STR
2966 "Set terminal line parameters\n"
2967 "Copy debug output to the current terminal line\n")
2968 {
2969 return terminal_no_monitor(self, vty, argc, argv);
2970 }
2971
2972
2973 DEFUN_NOSH (show_history,
2974 show_history_cmd,
2975 "show history",
2976 SHOW_STR
2977 "Display the session command history\n")
2978 {
2979 int index;
2980
2981 for (index = vty->hindex + 1; index != vty->hindex;) {
2982 if (index == VTY_MAXHIST) {
2983 index = 0;
2984 continue;
2985 }
2986
2987 if (vty->hist[index] != NULL)
2988 vty_out(vty, " %s\n", vty->hist[index]);
2989
2990 index++;
2991 }
2992
2993 return CMD_SUCCESS;
2994 }
2995
2996 /* vty login. */
2997 DEFUN (log_commands,
2998 log_commands_cmd,
2999 "log commands",
3000 "Logging control\n"
3001 "Log all commands (can't be unset without restart)\n")
3002 {
3003 do_log_commands = 1;
3004 return CMD_SUCCESS;
3005 }
3006
3007 /* Display current configuration. */
3008 static int vty_config_write(struct vty *vty)
3009 {
3010 vty_out(vty, "line vty\n");
3011
3012 if (vty_accesslist_name)
3013 vty_out(vty, " access-class %s\n", vty_accesslist_name);
3014
3015 if (vty_ipv6_accesslist_name)
3016 vty_out(vty, " ipv6 access-class %s\n",
3017 vty_ipv6_accesslist_name);
3018
3019 /* exec-timeout */
3020 if (vty_timeout_val != VTY_TIMEOUT_DEFAULT)
3021 vty_out(vty, " exec-timeout %ld %ld\n", vty_timeout_val / 60,
3022 vty_timeout_val % 60);
3023
3024 /* login */
3025 if (no_password_check)
3026 vty_out(vty, " no login\n");
3027
3028 if (do_log_commands)
3029 vty_out(vty, "log commands\n");
3030
3031 vty_out(vty, "!\n");
3032
3033 return CMD_SUCCESS;
3034 }
3035
3036 struct cmd_node vty_node = {
3037 VTY_NODE, "%s(config-line)# ", 1,
3038 };
3039
3040 /* Reset all VTY status. */
3041 void vty_reset()
3042 {
3043 unsigned int i;
3044 struct vty *vty;
3045 struct thread *vty_serv_thread;
3046
3047 for (i = 0; i < vector_active(vtyvec); i++)
3048 if ((vty = vector_slot(vtyvec, i)) != NULL) {
3049 buffer_reset(vty->lbuf);
3050 buffer_reset(vty->obuf);
3051 vty->status = VTY_CLOSE;
3052 vty_close(vty);
3053 }
3054
3055 for (i = 0; i < vector_active(Vvty_serv_thread); i++)
3056 if ((vty_serv_thread = vector_slot(Vvty_serv_thread, i))
3057 != NULL) {
3058 thread_cancel(vty_serv_thread);
3059 vector_slot(Vvty_serv_thread, i) = NULL;
3060 close(i);
3061 }
3062
3063 vty_timeout_val = VTY_TIMEOUT_DEFAULT;
3064
3065 if (vty_accesslist_name) {
3066 XFREE(MTYPE_VTY, vty_accesslist_name);
3067 vty_accesslist_name = NULL;
3068 }
3069
3070 if (vty_ipv6_accesslist_name) {
3071 XFREE(MTYPE_VTY, vty_ipv6_accesslist_name);
3072 vty_ipv6_accesslist_name = NULL;
3073 }
3074 }
3075
3076 static void vty_save_cwd(void)
3077 {
3078 char cwd[MAXPATHLEN];
3079 char *c;
3080
3081 c = getcwd(cwd, MAXPATHLEN);
3082
3083 if (!c) {
3084 /*
3085 * At this point if these go wrong, more than likely
3086 * the whole world is coming down around us
3087 * Hence not worrying about it too much.
3088 */
3089 if (!chdir(SYSCONFDIR)) {
3090 flog_err_sys(EC_LIB_SYSTEM_CALL,
3091 "Failure to chdir to %s, errno: %d",
3092 SYSCONFDIR, errno);
3093 exit(-1);
3094 }
3095 if (getcwd(cwd, MAXPATHLEN) == NULL) {
3096 flog_err_sys(EC_LIB_SYSTEM_CALL,
3097 "Failure to getcwd, errno: %d", errno);
3098 exit(-1);
3099 }
3100 }
3101
3102 vty_cwd = XMALLOC(MTYPE_TMP, strlen(cwd) + 1);
3103 strcpy(vty_cwd, cwd);
3104 }
3105
3106 char *vty_get_cwd()
3107 {
3108 return vty_cwd;
3109 }
3110
3111 int vty_shell(struct vty *vty)
3112 {
3113 return vty->type == VTY_SHELL ? 1 : 0;
3114 }
3115
3116 int vty_shell_serv(struct vty *vty)
3117 {
3118 return vty->type == VTY_SHELL_SERV ? 1 : 0;
3119 }
3120
3121 void vty_init_vtysh()
3122 {
3123 vtyvec = vector_init(VECTOR_MIN_SIZE);
3124 }
3125
3126 /* Install vty's own commands like `who' command. */
3127 void vty_init(struct thread_master *master_thread)
3128 {
3129 /* For further configuration read, preserve current directory. */
3130 vty_save_cwd();
3131
3132 vtyvec = vector_init(VECTOR_MIN_SIZE);
3133
3134 vty_master = master_thread;
3135
3136 atexit(vty_stdio_atexit);
3137
3138 /* Initilize server thread vector. */
3139 Vvty_serv_thread = vector_init(VECTOR_MIN_SIZE);
3140
3141 /* Install bgp top node. */
3142 install_node(&vty_node, vty_config_write);
3143
3144 install_element(VIEW_NODE, &config_who_cmd);
3145 install_element(VIEW_NODE, &show_history_cmd);
3146 install_element(CONFIG_NODE, &line_vty_cmd);
3147 install_element(CONFIG_NODE, &service_advanced_vty_cmd);
3148 install_element(CONFIG_NODE, &no_service_advanced_vty_cmd);
3149 install_element(CONFIG_NODE, &show_history_cmd);
3150 install_element(CONFIG_NODE, &log_commands_cmd);
3151 install_element(ENABLE_NODE, &terminal_monitor_cmd);
3152 install_element(ENABLE_NODE, &terminal_no_monitor_cmd);
3153 install_element(ENABLE_NODE, &no_terminal_monitor_cmd);
3154
3155 install_default(VTY_NODE);
3156 install_element(VTY_NODE, &exec_timeout_min_cmd);
3157 install_element(VTY_NODE, &exec_timeout_sec_cmd);
3158 install_element(VTY_NODE, &no_exec_timeout_cmd);
3159 install_element(VTY_NODE, &vty_access_class_cmd);
3160 install_element(VTY_NODE, &no_vty_access_class_cmd);
3161 install_element(VTY_NODE, &vty_login_cmd);
3162 install_element(VTY_NODE, &no_vty_login_cmd);
3163 install_element(VTY_NODE, &vty_ipv6_access_class_cmd);
3164 install_element(VTY_NODE, &no_vty_ipv6_access_class_cmd);
3165 }
3166
3167 void vty_terminate(void)
3168 {
3169 if (vty_cwd)
3170 XFREE(MTYPE_TMP, vty_cwd);
3171
3172 if (vtyvec && Vvty_serv_thread) {
3173 vty_reset();
3174 vector_free(vtyvec);
3175 vector_free(Vvty_serv_thread);
3176 vtyvec = NULL;
3177 Vvty_serv_thread = NULL;
3178 }
3179 }
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