Annotation of embedaddon/quagga/lib/vty.c, revision 1.1.1.2

1.1       misho       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
                     18:  * along with GNU Zebra; see the file COPYING.  If not, write to the Free
                     19:  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
                     20:  * 02111-1307, USA.  
                     21:  */
                     22: 
                     23: #include <zebra.h>
                     24: 
                     25: #include "linklist.h"
                     26: #include "thread.h"
                     27: #include "buffer.h"
                     28: #include <lib/version.h>
                     29: #include "command.h"
                     30: #include "sockunion.h"
                     31: #include "memory.h"
                     32: #include "str.h"
                     33: #include "log.h"
                     34: #include "prefix.h"
                     35: #include "filter.h"
                     36: #include "vty.h"
                     37: #include "privs.h"
                     38: #include "network.h"
                     39: 
                     40: #include <arpa/telnet.h>
                     41: 
                     42: /* Vty events */
                     43: enum event 
                     44: {
                     45:   VTY_SERV,
                     46:   VTY_READ,
                     47:   VTY_WRITE,
                     48:   VTY_TIMEOUT_RESET,
                     49: #ifdef VTYSH
                     50:   VTYSH_SERV,
                     51:   VTYSH_READ,
                     52:   VTYSH_WRITE
                     53: #endif /* VTYSH */
                     54: };
                     55: 
                     56: static void vty_event (enum event, int, struct vty *);
                     57: 
                     58: /* Extern host structure from command.c */
                     59: extern struct host host;
                     60: 
                     61: /* Vector which store each vty structure. */
                     62: static vector vtyvec;
                     63: 
                     64: /* Vty timeout value. */
                     65: static unsigned long vty_timeout_val = VTY_TIMEOUT_DEFAULT;
                     66: 
                     67: /* Vty access-class command */
                     68: static char *vty_accesslist_name = NULL;
                     69: 
                     70: /* Vty access-calss for IPv6. */
                     71: static char *vty_ipv6_accesslist_name = NULL;
                     72: 
                     73: /* VTY server thread. */
                     74: vector Vvty_serv_thread;
                     75: 
                     76: /* Current directory. */
                     77: char *vty_cwd = NULL;
                     78: 
                     79: /* Configure lock. */
                     80: static int vty_config;
                     81: 
                     82: /* Login password check. */
                     83: static int no_password_check = 0;
                     84: 
                     85: /* Restrict unauthenticated logins? */
                     86: static const u_char restricted_mode_default = 0;
                     87: static u_char restricted_mode = 0;
                     88: 
                     89: /* Integrated configuration file path */
                     90: char integrate_default[] = SYSCONFDIR INTEGRATE_DEFAULT_CONFIG;
                     91: 
                     92: 
                     93: /* VTY standard output function. */
                     94: int
                     95: vty_out (struct vty *vty, const char *format, ...)
                     96: {
                     97:   va_list args;
                     98:   int len = 0;
                     99:   int size = 1024;
                    100:   char buf[1024];
                    101:   char *p = NULL;
                    102: 
                    103:   if (vty_shell (vty))
                    104:     {
                    105:       va_start (args, format);
                    106:       vprintf (format, args);
                    107:       va_end (args);
                    108:     }
                    109:   else
                    110:     {
                    111:       /* Try to write to initial buffer.  */
                    112:       va_start (args, format);
                    113:       len = vsnprintf (buf, sizeof buf, format, args);
                    114:       va_end (args);
                    115: 
                    116:       /* Initial buffer is not enough.  */
                    117:       if (len < 0 || len >= size)
                    118:        {
                    119:          while (1)
                    120:            {
                    121:              if (len > -1)
                    122:                size = len + 1;
                    123:              else
                    124:                size = size * 2;
                    125: 
                    126:              p = XREALLOC (MTYPE_VTY_OUT_BUF, p, size);
                    127:              if (! p)
                    128:                return -1;
                    129: 
                    130:              va_start (args, format);
                    131:              len = vsnprintf (p, size, format, args);
                    132:              va_end (args);
                    133: 
                    134:              if (len > -1 && len < size)
                    135:                break;
                    136:            }
                    137:        }
                    138: 
                    139:       /* When initial buffer is enough to store all output.  */
                    140:       if (! p)
                    141:        p = buf;
                    142: 
                    143:       /* Pointer p must point out buffer. */
                    144:       buffer_put (vty->obuf, (u_char *) p, len);
                    145: 
                    146:       /* If p is not different with buf, it is allocated buffer.  */
                    147:       if (p != buf)
                    148:        XFREE (MTYPE_VTY_OUT_BUF, p);
                    149:     }
                    150: 
                    151:   return len;
                    152: }
                    153: 
                    154: static int
                    155: vty_log_out (struct vty *vty, const char *level, const char *proto_str,
                    156:             const char *format, struct timestamp_control *ctl, va_list va)
                    157: {
                    158:   int ret;
                    159:   int len;
                    160:   char buf[1024];
                    161: 
                    162:   if (!ctl->already_rendered)
                    163:     {
                    164:       ctl->len = quagga_timestamp(ctl->precision, ctl->buf, sizeof(ctl->buf));
                    165:       ctl->already_rendered = 1;
                    166:     }
                    167:   if (ctl->len+1 >= sizeof(buf))
                    168:     return -1;
                    169:   memcpy(buf, ctl->buf, len = ctl->len);
                    170:   buf[len++] = ' ';
                    171:   buf[len] = '\0';
                    172: 
                    173:   if (level)
                    174:     ret = snprintf(buf+len, sizeof(buf)-len, "%s: %s: ", level, proto_str);
                    175:   else
                    176:     ret = snprintf(buf+len, sizeof(buf)-len, "%s: ", proto_str);
                    177:   if ((ret < 0) || ((size_t)(len += ret) >= sizeof(buf)))
                    178:     return -1;
                    179: 
                    180:   if (((ret = vsnprintf(buf+len, sizeof(buf)-len, format, va)) < 0) ||
                    181:       ((size_t)((len += ret)+2) > sizeof(buf)))
                    182:     return -1;
                    183: 
                    184:   buf[len++] = '\r';
                    185:   buf[len++] = '\n';
                    186: 
                    187:   if (write(vty->fd, buf, len) < 0)
                    188:     {
                    189:       if (ERRNO_IO_RETRY(errno))
                    190:        /* Kernel buffer is full, probably too much debugging output, so just
                    191:           drop the data and ignore. */
                    192:        return -1;
                    193:       /* Fatal I/O error. */
                    194:       vty->monitor = 0; /* disable monitoring to avoid infinite recursion */
                    195:       zlog_warn("%s: write failed to vty client fd %d, closing: %s",
                    196:                __func__, vty->fd, safe_strerror(errno));
                    197:       buffer_reset(vty->obuf);
                    198:       /* cannot call vty_close, because a parent routine may still try
                    199:          to access the vty struct */
                    200:       vty->status = VTY_CLOSE;
                    201:       shutdown(vty->fd, SHUT_RDWR);
                    202:       return -1;
                    203:     }
                    204:   return 0;
                    205: }
                    206: 
                    207: /* Output current time to the vty. */
                    208: void
                    209: vty_time_print (struct vty *vty, int cr)
                    210: {
                    211:   char buf [25];
                    212:   
                    213:   if (quagga_timestamp(0, buf, sizeof(buf)) == 0)
                    214:     {
                    215:       zlog (NULL, LOG_INFO, "quagga_timestamp error");
                    216:       return;
                    217:     }
                    218:   if (cr)
                    219:     vty_out (vty, "%s\n", buf);
                    220:   else
                    221:     vty_out (vty, "%s ", buf);
                    222: 
                    223:   return;
                    224: }
                    225: 
                    226: /* Say hello to vty interface. */
                    227: void
                    228: vty_hello (struct vty *vty)
                    229: {
                    230:   if (host.motdfile)
                    231:     {
                    232:       FILE *f;
                    233:       char buf[4096];
                    234: 
                    235:       f = fopen (host.motdfile, "r");
                    236:       if (f)
                    237:        {
                    238:          while (fgets (buf, sizeof (buf), f))
                    239:            {
                    240:              char *s;
                    241:              /* work backwards to ignore trailling isspace() */
                    242:              for (s = buf + strlen (buf); (s > buf) && isspace ((int)*(s - 1));
                    243:                   s--);
                    244:              *s = '\0';
                    245:              vty_out (vty, "%s%s", buf, VTY_NEWLINE);
                    246:            }
                    247:          fclose (f);
                    248:        }
                    249:       else
                    250:        vty_out (vty, "MOTD file not found%s", VTY_NEWLINE);
                    251:     }
                    252:   else if (host.motd)
                    253:     vty_out (vty, "%s", host.motd);
                    254: }
                    255: 
                    256: /* Put out prompt and wait input from user. */
                    257: static void
                    258: vty_prompt (struct vty *vty)
                    259: {
                    260:   struct utsname names;
                    261:   const char*hostname;
                    262: 
                    263:   if (vty->type == VTY_TERM)
                    264:     {
                    265:       hostname = host.name;
                    266:       if (!hostname)
                    267:        {
                    268:          uname (&names);
                    269:          hostname = names.nodename;
                    270:        }
                    271:       vty_out (vty, cmd_prompt (vty->node), hostname);
                    272:     }
                    273: }
                    274: 
                    275: /* Send WILL TELOPT_ECHO to remote server. */
                    276: static void
                    277: vty_will_echo (struct vty *vty)
                    278: {
                    279:   unsigned char cmd[] = { IAC, WILL, TELOPT_ECHO, '\0' };
                    280:   vty_out (vty, "%s", cmd);
                    281: }
                    282: 
                    283: /* Make suppress Go-Ahead telnet option. */
                    284: static void
                    285: vty_will_suppress_go_ahead (struct vty *vty)
                    286: {
                    287:   unsigned char cmd[] = { IAC, WILL, TELOPT_SGA, '\0' };
                    288:   vty_out (vty, "%s", cmd);
                    289: }
                    290: 
                    291: /* Make don't use linemode over telnet. */
                    292: static void
                    293: vty_dont_linemode (struct vty *vty)
                    294: {
                    295:   unsigned char cmd[] = { IAC, DONT, TELOPT_LINEMODE, '\0' };
                    296:   vty_out (vty, "%s", cmd);
                    297: }
                    298: 
                    299: /* Use window size. */
                    300: static void
                    301: vty_do_window_size (struct vty *vty)
                    302: {
                    303:   unsigned char cmd[] = { IAC, DO, TELOPT_NAWS, '\0' };
                    304:   vty_out (vty, "%s", cmd);
                    305: }
                    306: 
                    307: #if 0 /* Currently not used. */
                    308: /* Make don't use lflow vty interface. */
                    309: static void
                    310: vty_dont_lflow_ahead (struct vty *vty)
                    311: {
                    312:   unsigned char cmd[] = { IAC, DONT, TELOPT_LFLOW, '\0' };
                    313:   vty_out (vty, "%s", cmd);
                    314: }
                    315: #endif /* 0 */
                    316: 
                    317: /* Allocate new vty struct. */
                    318: struct vty *
                    319: vty_new ()
                    320: {
                    321:   struct vty *new = XCALLOC (MTYPE_VTY, sizeof (struct vty));
                    322: 
                    323:   new->obuf = buffer_new(0);   /* Use default buffer size. */
                    324:   new->buf = XCALLOC (MTYPE_VTY, VTY_BUFSIZ);
                    325:   new->max = VTY_BUFSIZ;
                    326: 
                    327:   return new;
                    328: }
                    329: 
                    330: /* Authentication of vty */
                    331: static void
                    332: vty_auth (struct vty *vty, char *buf)
                    333: {
                    334:   char *passwd = NULL;
                    335:   enum node_type next_node = 0;
                    336:   int fail;
                    337:   char *crypt (const char *, const char *);
                    338: 
                    339:   switch (vty->node)
                    340:     {
                    341:     case AUTH_NODE:
                    342:       if (host.encrypt)
                    343:        passwd = host.password_encrypt;
                    344:       else
                    345:        passwd = host.password;
                    346:       if (host.advanced)
                    347:        next_node = host.enable ? VIEW_NODE : ENABLE_NODE;
                    348:       else
                    349:        next_node = VIEW_NODE;
                    350:       break;
                    351:     case AUTH_ENABLE_NODE:
                    352:       if (host.encrypt)
                    353:        passwd = host.enable_encrypt;
                    354:       else
                    355:        passwd = host.enable;
                    356:       next_node = ENABLE_NODE;
                    357:       break;
                    358:     }
                    359: 
                    360:   if (passwd)
                    361:     {
                    362:       if (host.encrypt)
                    363:        fail = strcmp (crypt(buf, passwd), passwd);
                    364:       else
                    365:        fail = strcmp (buf, passwd);
                    366:     }
                    367:   else
                    368:     fail = 1;
                    369: 
                    370:   if (! fail)
                    371:     {
                    372:       vty->fail = 0;
                    373:       vty->node = next_node;   /* Success ! */
                    374:     }
                    375:   else
                    376:     {
                    377:       vty->fail++;
                    378:       if (vty->fail >= 3)
                    379:        {
                    380:          if (vty->node == AUTH_NODE)
                    381:            {
                    382:              vty_out (vty, "%% Bad passwords, too many failures!%s", VTY_NEWLINE);
                    383:              vty->status = VTY_CLOSE;
                    384:            }
                    385:          else                  
                    386:            {
                    387:              /* AUTH_ENABLE_NODE */
                    388:              vty->fail = 0;
                    389:              vty_out (vty, "%% Bad enable passwords, too many failures!%s", VTY_NEWLINE);
                    390:              vty->node = restricted_mode ? RESTRICTED_NODE : VIEW_NODE;
                    391:            }
                    392:        }
                    393:     }
                    394: }
                    395: 
                    396: /* Command execution over the vty interface. */
                    397: static int
                    398: vty_command (struct vty *vty, char *buf)
                    399: {
                    400:   int ret;
                    401:   vector vline;
                    402:   const char *protocolname;
                    403: 
                    404:   /* Split readline string up into the vector */
                    405:   vline = cmd_make_strvec (buf);
                    406: 
                    407:   if (vline == NULL)
                    408:     return CMD_SUCCESS;
                    409: 
                    410: #ifdef CONSUMED_TIME_CHECK
                    411:   {
                    412:     RUSAGE_T before;
                    413:     RUSAGE_T after;
                    414:     unsigned long realtime, cputime;
                    415: 
                    416:     GETRUSAGE(&before);
                    417: #endif /* CONSUMED_TIME_CHECK */
                    418: 
                    419:   ret = cmd_execute_command (vline, vty, NULL, 0);
                    420: 
                    421:   /* Get the name of the protocol if any */
                    422:   if (zlog_default)
                    423:       protocolname = zlog_proto_names[zlog_default->protocol];
                    424:   else
                    425:       protocolname = zlog_proto_names[ZLOG_NONE];
                    426:                                                                            
                    427: #ifdef CONSUMED_TIME_CHECK
                    428:     GETRUSAGE(&after);
                    429:     if ((realtime = thread_consumed_time(&after, &before, &cputime)) >
                    430:        CONSUMED_TIME_CHECK)
                    431:       /* Warn about CPU hog that must be fixed. */
                    432:       zlog_warn("SLOW COMMAND: command took %lums (cpu time %lums): %s",
                    433:                realtime/1000, cputime/1000, buf);
                    434:   }
                    435: #endif /* CONSUMED_TIME_CHECK */
                    436: 
                    437:   if (ret != CMD_SUCCESS)
                    438:     switch (ret)
                    439:       {
                    440:       case CMD_WARNING:
                    441:        if (vty->type == VTY_FILE)
                    442:          vty_out (vty, "Warning...%s", VTY_NEWLINE);
                    443:        break;
                    444:       case CMD_ERR_AMBIGUOUS:
                    445:        vty_out (vty, "%% Ambiguous command.%s", VTY_NEWLINE);
                    446:        break;
                    447:       case CMD_ERR_NO_MATCH:
                    448:        vty_out (vty, "%% [%s] Unknown command: %s%s", protocolname, buf, VTY_NEWLINE);
                    449:        break;
                    450:       case CMD_ERR_INCOMPLETE:
                    451:        vty_out (vty, "%% Command incomplete.%s", VTY_NEWLINE);
                    452:        break;
                    453:       }
                    454:   cmd_free_strvec (vline);
                    455: 
                    456:   return ret;
                    457: }
                    458: 
                    459: static const char telnet_backward_char = 0x08;
                    460: static const char telnet_space_char = ' ';
                    461: 
                    462: /* Basic function to write buffer to vty. */
                    463: static void
                    464: vty_write (struct vty *vty, const char *buf, size_t nbytes)
                    465: {
                    466:   if ((vty->node == AUTH_NODE) || (vty->node == AUTH_ENABLE_NODE))
                    467:     return;
                    468: 
                    469:   /* Should we do buffering here ?  And make vty_flush (vty) ? */
                    470:   buffer_put (vty->obuf, buf, nbytes);
                    471: }
                    472: 
                    473: /* Ensure length of input buffer.  Is buffer is short, double it. */
                    474: static void
                    475: vty_ensure (struct vty *vty, int length)
                    476: {
                    477:   if (vty->max <= length)
                    478:     {
                    479:       vty->max *= 2;
                    480:       vty->buf = XREALLOC (MTYPE_VTY, vty->buf, vty->max);
                    481:     }
                    482: }
                    483: 
                    484: /* Basic function to insert character into vty. */
                    485: static void
                    486: vty_self_insert (struct vty *vty, char c)
                    487: {
                    488:   int i;
                    489:   int length;
                    490: 
                    491:   vty_ensure (vty, vty->length + 1);
                    492:   length = vty->length - vty->cp;
                    493:   memmove (&vty->buf[vty->cp + 1], &vty->buf[vty->cp], length);
                    494:   vty->buf[vty->cp] = c;
                    495: 
                    496:   vty_write (vty, &vty->buf[vty->cp], length + 1);
                    497:   for (i = 0; i < length; i++)
                    498:     vty_write (vty, &telnet_backward_char, 1);
                    499: 
                    500:   vty->cp++;
                    501:   vty->length++;
                    502: }
                    503: 
                    504: /* Self insert character 'c' in overwrite mode. */
                    505: static void
                    506: vty_self_insert_overwrite (struct vty *vty, char c)
                    507: {
                    508:   vty_ensure (vty, vty->length + 1);
                    509:   vty->buf[vty->cp++] = c;
                    510: 
                    511:   if (vty->cp > vty->length)
                    512:     vty->length++;
                    513: 
                    514:   if ((vty->node == AUTH_NODE) || (vty->node == AUTH_ENABLE_NODE))
                    515:     return;
                    516: 
                    517:   vty_write (vty, &c, 1);
                    518: }
                    519: 
                    520: /* Insert a word into vty interface with overwrite mode. */
                    521: static void
                    522: vty_insert_word_overwrite (struct vty *vty, char *str)
                    523: {
                    524:   int len = strlen (str);
                    525:   vty_write (vty, str, len);
                    526:   strcpy (&vty->buf[vty->cp], str);
                    527:   vty->cp += len;
                    528:   vty->length = vty->cp;
                    529: }
                    530: 
                    531: /* Forward character. */
                    532: static void
                    533: vty_forward_char (struct vty *vty)
                    534: {
                    535:   if (vty->cp < vty->length)
                    536:     {
                    537:       vty_write (vty, &vty->buf[vty->cp], 1);
                    538:       vty->cp++;
                    539:     }
                    540: }
                    541: 
                    542: /* Backward character. */
                    543: static void
                    544: vty_backward_char (struct vty *vty)
                    545: {
                    546:   if (vty->cp > 0)
                    547:     {
                    548:       vty->cp--;
                    549:       vty_write (vty, &telnet_backward_char, 1);
                    550:     }
                    551: }
                    552: 
                    553: /* Move to the beginning of the line. */
                    554: static void
                    555: vty_beginning_of_line (struct vty *vty)
                    556: {
                    557:   while (vty->cp)
                    558:     vty_backward_char (vty);
                    559: }
                    560: 
                    561: /* Move to the end of the line. */
                    562: static void
                    563: vty_end_of_line (struct vty *vty)
                    564: {
                    565:   while (vty->cp < vty->length)
                    566:     vty_forward_char (vty);
                    567: }
                    568: 
                    569: static void vty_kill_line_from_beginning (struct vty *);
                    570: static void vty_redraw_line (struct vty *);
                    571: 
                    572: /* Print command line history.  This function is called from
                    573:    vty_next_line and vty_previous_line. */
                    574: static void
                    575: vty_history_print (struct vty *vty)
                    576: {
                    577:   int length;
                    578: 
                    579:   vty_kill_line_from_beginning (vty);
                    580: 
                    581:   /* Get previous line from history buffer */
                    582:   length = strlen (vty->hist[vty->hp]);
                    583:   memcpy (vty->buf, vty->hist[vty->hp], length);
                    584:   vty->cp = vty->length = length;
                    585: 
                    586:   /* Redraw current line */
                    587:   vty_redraw_line (vty);
                    588: }
                    589: 
                    590: /* Show next command line history. */
                    591: static void
                    592: vty_next_line (struct vty *vty)
                    593: {
                    594:   int try_index;
                    595: 
                    596:   if (vty->hp == vty->hindex)
                    597:     return;
                    598: 
                    599:   /* Try is there history exist or not. */
                    600:   try_index = vty->hp;
                    601:   if (try_index == (VTY_MAXHIST - 1))
                    602:     try_index = 0;
                    603:   else
                    604:     try_index++;
                    605: 
                    606:   /* If there is not history return. */
                    607:   if (vty->hist[try_index] == NULL)
                    608:     return;
                    609:   else
                    610:     vty->hp = try_index;
                    611: 
                    612:   vty_history_print (vty);
                    613: }
                    614: 
                    615: /* Show previous command line history. */
                    616: static void
                    617: vty_previous_line (struct vty *vty)
                    618: {
                    619:   int try_index;
                    620: 
                    621:   try_index = vty->hp;
                    622:   if (try_index == 0)
                    623:     try_index = VTY_MAXHIST - 1;
                    624:   else
                    625:     try_index--;
                    626: 
                    627:   if (vty->hist[try_index] == NULL)
                    628:     return;
                    629:   else
                    630:     vty->hp = try_index;
                    631: 
                    632:   vty_history_print (vty);
                    633: }
                    634: 
                    635: /* This function redraw all of the command line character. */
                    636: static void
                    637: vty_redraw_line (struct vty *vty)
                    638: {
                    639:   vty_write (vty, vty->buf, vty->length);
                    640:   vty->cp = vty->length;
                    641: }
                    642: 
                    643: /* Forward word. */
                    644: static void
                    645: vty_forward_word (struct vty *vty)
                    646: {
                    647:   while (vty->cp != vty->length && vty->buf[vty->cp] != ' ')
                    648:     vty_forward_char (vty);
                    649:   
                    650:   while (vty->cp != vty->length && vty->buf[vty->cp] == ' ')
                    651:     vty_forward_char (vty);
                    652: }
                    653: 
                    654: /* Backward word without skipping training space. */
                    655: static void
                    656: vty_backward_pure_word (struct vty *vty)
                    657: {
                    658:   while (vty->cp > 0 && vty->buf[vty->cp - 1] != ' ')
                    659:     vty_backward_char (vty);
                    660: }
                    661: 
                    662: /* Backward word. */
                    663: static void
                    664: vty_backward_word (struct vty *vty)
                    665: {
                    666:   while (vty->cp > 0 && vty->buf[vty->cp - 1] == ' ')
                    667:     vty_backward_char (vty);
                    668: 
                    669:   while (vty->cp > 0 && vty->buf[vty->cp - 1] != ' ')
                    670:     vty_backward_char (vty);
                    671: }
                    672: 
                    673: /* When '^D' is typed at the beginning of the line we move to the down
                    674:    level. */
                    675: static void
                    676: vty_down_level (struct vty *vty)
                    677: {
                    678:   vty_out (vty, "%s", VTY_NEWLINE);
                    679:   (*config_exit_cmd.func)(NULL, vty, 0, NULL);
                    680:   vty_prompt (vty);
                    681:   vty->cp = 0;
                    682: }
                    683: 
                    684: /* When '^Z' is received from vty, move down to the enable mode. */
                    685: static void
                    686: vty_end_config (struct vty *vty)
                    687: {
                    688:   vty_out (vty, "%s", VTY_NEWLINE);
                    689: 
                    690:   switch (vty->node)
                    691:     {
                    692:     case VIEW_NODE:
                    693:     case ENABLE_NODE:
                    694:     case RESTRICTED_NODE:
                    695:       /* Nothing to do. */
                    696:       break;
                    697:     case CONFIG_NODE:
                    698:     case INTERFACE_NODE:
                    699:     case ZEBRA_NODE:
                    700:     case RIP_NODE:
                    701:     case RIPNG_NODE:
1.1.1.2 ! misho     702:     case BABEL_NODE:
1.1       misho     703:     case BGP_NODE:
                    704:     case BGP_VPNV4_NODE:
                    705:     case BGP_IPV4_NODE:
                    706:     case BGP_IPV4M_NODE:
                    707:     case BGP_IPV6_NODE:
                    708:     case BGP_IPV6M_NODE:
                    709:     case RMAP_NODE:
                    710:     case OSPF_NODE:
                    711:     case OSPF6_NODE:
                    712:     case ISIS_NODE:
                    713:     case KEYCHAIN_NODE:
                    714:     case KEYCHAIN_KEY_NODE:
                    715:     case MASC_NODE:
                    716:     case VTY_NODE:
                    717:       vty_config_unlock (vty);
                    718:       vty->node = ENABLE_NODE;
                    719:       break;
                    720:     default:
                    721:       /* Unknown node, we have to ignore it. */
                    722:       break;
                    723:     }
                    724: 
                    725:   vty_prompt (vty);
                    726:   vty->cp = 0;
                    727: }
                    728: 
                    729: /* Delete a charcter at the current point. */
                    730: static void
                    731: vty_delete_char (struct vty *vty)
                    732: {
                    733:   int i;
                    734:   int size;
                    735: 
                    736:   if (vty->length == 0)
                    737:     {
                    738:       vty_down_level (vty);
                    739:       return;
                    740:     }
                    741: 
                    742:   if (vty->cp == vty->length)
                    743:     return;                    /* completion need here? */
                    744: 
                    745:   size = vty->length - vty->cp;
                    746: 
                    747:   vty->length--;
                    748:   memmove (&vty->buf[vty->cp], &vty->buf[vty->cp + 1], size - 1);
                    749:   vty->buf[vty->length] = '\0';
                    750:   
                    751:   if (vty->node == AUTH_NODE || vty->node == AUTH_ENABLE_NODE)
                    752:     return;
                    753: 
                    754:   vty_write (vty, &vty->buf[vty->cp], size - 1);
                    755:   vty_write (vty, &telnet_space_char, 1);
                    756: 
                    757:   for (i = 0; i < size; i++)
                    758:     vty_write (vty, &telnet_backward_char, 1);
                    759: }
                    760: 
                    761: /* Delete a character before the point. */
                    762: static void
                    763: vty_delete_backward_char (struct vty *vty)
                    764: {
                    765:   if (vty->cp == 0)
                    766:     return;
                    767: 
                    768:   vty_backward_char (vty);
                    769:   vty_delete_char (vty);
                    770: }
                    771: 
                    772: /* Kill rest of line from current point. */
                    773: static void
                    774: vty_kill_line (struct vty *vty)
                    775: {
                    776:   int i;
                    777:   int size;
                    778: 
                    779:   size = vty->length - vty->cp;
                    780:   
                    781:   if (size == 0)
                    782:     return;
                    783: 
                    784:   for (i = 0; i < size; i++)
                    785:     vty_write (vty, &telnet_space_char, 1);
                    786:   for (i = 0; i < size; i++)
                    787:     vty_write (vty, &telnet_backward_char, 1);
                    788: 
                    789:   memset (&vty->buf[vty->cp], 0, size);
                    790:   vty->length = vty->cp;
                    791: }
                    792: 
                    793: /* Kill line from the beginning. */
                    794: static void
                    795: vty_kill_line_from_beginning (struct vty *vty)
                    796: {
                    797:   vty_beginning_of_line (vty);
                    798:   vty_kill_line (vty);
                    799: }
                    800: 
                    801: /* Delete a word before the point. */
                    802: static void
                    803: vty_forward_kill_word (struct vty *vty)
                    804: {
                    805:   while (vty->cp != vty->length && vty->buf[vty->cp] == ' ')
                    806:     vty_delete_char (vty);
                    807:   while (vty->cp != vty->length && vty->buf[vty->cp] != ' ')
                    808:     vty_delete_char (vty);
                    809: }
                    810: 
                    811: /* Delete a word before the point. */
                    812: static void
                    813: vty_backward_kill_word (struct vty *vty)
                    814: {
                    815:   while (vty->cp > 0 && vty->buf[vty->cp - 1] == ' ')
                    816:     vty_delete_backward_char (vty);
                    817:   while (vty->cp > 0 && vty->buf[vty->cp - 1] != ' ')
                    818:     vty_delete_backward_char (vty);
                    819: }
                    820: 
                    821: /* Transpose chars before or at the point. */
                    822: static void
                    823: vty_transpose_chars (struct vty *vty)
                    824: {
                    825:   char c1, c2;
                    826: 
                    827:   /* If length is short or point is near by the beginning of line then
                    828:      return. */
                    829:   if (vty->length < 2 || vty->cp < 1)
                    830:     return;
                    831: 
                    832:   /* In case of point is located at the end of the line. */
                    833:   if (vty->cp == vty->length)
                    834:     {
                    835:       c1 = vty->buf[vty->cp - 1];
                    836:       c2 = vty->buf[vty->cp - 2];
                    837: 
                    838:       vty_backward_char (vty);
                    839:       vty_backward_char (vty);
                    840:       vty_self_insert_overwrite (vty, c1);
                    841:       vty_self_insert_overwrite (vty, c2);
                    842:     }
                    843:   else
                    844:     {
                    845:       c1 = vty->buf[vty->cp];
                    846:       c2 = vty->buf[vty->cp - 1];
                    847: 
                    848:       vty_backward_char (vty);
                    849:       vty_self_insert_overwrite (vty, c1);
                    850:       vty_self_insert_overwrite (vty, c2);
                    851:     }
                    852: }
                    853: 
                    854: /* Do completion at vty interface. */
                    855: static void
                    856: vty_complete_command (struct vty *vty)
                    857: {
                    858:   int i;
                    859:   int ret;
                    860:   char **matched = NULL;
                    861:   vector vline;
                    862: 
                    863:   if (vty->node == AUTH_NODE || vty->node == AUTH_ENABLE_NODE)
                    864:     return;
                    865: 
                    866:   vline = cmd_make_strvec (vty->buf);
                    867:   if (vline == NULL)
                    868:     return;
                    869: 
                    870:   /* In case of 'help \t'. */
                    871:   if (isspace ((int) vty->buf[vty->length - 1]))
                    872:     vector_set (vline, '\0');
                    873: 
                    874:   matched = cmd_complete_command (vline, vty, &ret);
                    875:   
                    876:   cmd_free_strvec (vline);
                    877: 
                    878:   vty_out (vty, "%s", VTY_NEWLINE);
                    879:   switch (ret)
                    880:     {
                    881:     case CMD_ERR_AMBIGUOUS:
                    882:       vty_out (vty, "%% Ambiguous command.%s", VTY_NEWLINE);
                    883:       vty_prompt (vty);
                    884:       vty_redraw_line (vty);
                    885:       break;
                    886:     case CMD_ERR_NO_MATCH:
                    887:       /* vty_out (vty, "%% There is no matched command.%s", VTY_NEWLINE); */
                    888:       vty_prompt (vty);
                    889:       vty_redraw_line (vty);
                    890:       break;
                    891:     case CMD_COMPLETE_FULL_MATCH:
                    892:       vty_prompt (vty);
                    893:       vty_redraw_line (vty);
                    894:       vty_backward_pure_word (vty);
                    895:       vty_insert_word_overwrite (vty, matched[0]);
                    896:       vty_self_insert (vty, ' ');
                    897:       XFREE (MTYPE_TMP, matched[0]);
                    898:       break;
                    899:     case CMD_COMPLETE_MATCH:
                    900:       vty_prompt (vty);
                    901:       vty_redraw_line (vty);
                    902:       vty_backward_pure_word (vty);
                    903:       vty_insert_word_overwrite (vty, matched[0]);
                    904:       XFREE (MTYPE_TMP, matched[0]);
                    905:       vector_only_index_free (matched);
                    906:       return;
                    907:       break;
                    908:     case CMD_COMPLETE_LIST_MATCH:
                    909:       for (i = 0; matched[i] != NULL; i++)
                    910:        {
                    911:          if (i != 0 && ((i % 6) == 0))
                    912:            vty_out (vty, "%s", VTY_NEWLINE);
                    913:          vty_out (vty, "%-10s ", matched[i]);
                    914:          XFREE (MTYPE_TMP, matched[i]);
                    915:        }
                    916:       vty_out (vty, "%s", VTY_NEWLINE);
                    917: 
                    918:       vty_prompt (vty);
                    919:       vty_redraw_line (vty);
                    920:       break;
                    921:     case CMD_ERR_NOTHING_TODO:
                    922:       vty_prompt (vty);
                    923:       vty_redraw_line (vty);
                    924:       break;
                    925:     default:
                    926:       break;
                    927:     }
                    928:   if (matched)
                    929:     vector_only_index_free (matched);
                    930: }
                    931: 
                    932: static void
                    933: vty_describe_fold (struct vty *vty, int cmd_width,
                    934:                   unsigned int desc_width, struct desc *desc)
                    935: {
                    936:   char *buf;
                    937:   const char *cmd, *p;
                    938:   int pos;
                    939: 
                    940:   cmd = desc->cmd[0] == '.' ? desc->cmd + 1 : desc->cmd;
                    941: 
                    942:   if (desc_width <= 0)
                    943:     {
                    944:       vty_out (vty, "  %-*s  %s%s", cmd_width, cmd, desc->str, VTY_NEWLINE);
                    945:       return;
                    946:     }
                    947: 
                    948:   buf = XCALLOC (MTYPE_TMP, strlen (desc->str) + 1);
                    949: 
                    950:   for (p = desc->str; strlen (p) > desc_width; p += pos + 1)
                    951:     {
                    952:       for (pos = desc_width; pos > 0; pos--)
                    953:       if (*(p + pos) == ' ')
                    954:         break;
                    955: 
                    956:       if (pos == 0)
                    957:       break;
                    958: 
                    959:       strncpy (buf, p, pos);
                    960:       buf[pos] = '\0';
                    961:       vty_out (vty, "  %-*s  %s%s", cmd_width, cmd, buf, VTY_NEWLINE);
                    962: 
                    963:       cmd = "";
                    964:     }
                    965: 
                    966:   vty_out (vty, "  %-*s  %s%s", cmd_width, cmd, p, VTY_NEWLINE);
                    967: 
                    968:   XFREE (MTYPE_TMP, buf);
                    969: }
                    970: 
                    971: /* Describe matched command function. */
                    972: static void
                    973: vty_describe_command (struct vty *vty)
                    974: {
                    975:   int ret;
                    976:   vector vline;
                    977:   vector describe;
                    978:   unsigned int i, width, desc_width;
                    979:   struct desc *desc, *desc_cr = NULL;
                    980: 
                    981:   vline = cmd_make_strvec (vty->buf);
                    982: 
                    983:   /* In case of '> ?'. */
                    984:   if (vline == NULL)
                    985:     {
                    986:       vline = vector_init (1);
                    987:       vector_set (vline, '\0');
                    988:     }
                    989:   else 
                    990:     if (isspace ((int) vty->buf[vty->length - 1]))
                    991:       vector_set (vline, '\0');
                    992: 
                    993:   describe = cmd_describe_command (vline, vty, &ret);
                    994: 
                    995:   vty_out (vty, "%s", VTY_NEWLINE);
                    996: 
                    997:   /* Ambiguous error. */
                    998:   switch (ret)
                    999:     {
                   1000:     case CMD_ERR_AMBIGUOUS:
                   1001:       vty_out (vty, "%% Ambiguous command.%s", VTY_NEWLINE);
                   1002:       goto out;
                   1003:       break;
                   1004:     case CMD_ERR_NO_MATCH:
                   1005:       vty_out (vty, "%% There is no matched command.%s", VTY_NEWLINE);
                   1006:       goto out;
                   1007:       break;
                   1008:     }  
                   1009: 
                   1010:   /* Get width of command string. */
                   1011:   width = 0;
                   1012:   for (i = 0; i < vector_active (describe); i++)
                   1013:     if ((desc = vector_slot (describe, i)) != NULL)
                   1014:       {
                   1015:        unsigned int len;
                   1016: 
                   1017:        if (desc->cmd[0] == '\0')
                   1018:          continue;
                   1019: 
                   1020:        len = strlen (desc->cmd);
                   1021:        if (desc->cmd[0] == '.')
                   1022:          len--;
                   1023: 
                   1024:        if (width < len)
                   1025:          width = len;
                   1026:       }
                   1027: 
                   1028:   /* Get width of description string. */
                   1029:   desc_width = vty->width - (width + 6);
                   1030: 
                   1031:   /* Print out description. */
                   1032:   for (i = 0; i < vector_active (describe); i++)
                   1033:     if ((desc = vector_slot (describe, i)) != NULL)
                   1034:       {
                   1035:        if (desc->cmd[0] == '\0')
                   1036:          continue;
                   1037:        
                   1038:        if (strcmp (desc->cmd, command_cr) == 0)
                   1039:          {
                   1040:            desc_cr = desc;
                   1041:            continue;
                   1042:          }
                   1043: 
                   1044:        if (!desc->str)
                   1045:          vty_out (vty, "  %-s%s",
                   1046:                   desc->cmd[0] == '.' ? desc->cmd + 1 : desc->cmd,
                   1047:                   VTY_NEWLINE);
                   1048:        else if (desc_width >= strlen (desc->str))
                   1049:          vty_out (vty, "  %-*s  %s%s", width,
                   1050:                   desc->cmd[0] == '.' ? desc->cmd + 1 : desc->cmd,
                   1051:                   desc->str, VTY_NEWLINE);
                   1052:        else
                   1053:          vty_describe_fold (vty, width, desc_width, desc);
                   1054: 
                   1055: #if 0
                   1056:        vty_out (vty, "  %-*s %s%s", width
                   1057:                 desc->cmd[0] == '.' ? desc->cmd + 1 : desc->cmd,
                   1058:                 desc->str ? desc->str : "", VTY_NEWLINE);
                   1059: #endif /* 0 */
                   1060:       }
                   1061: 
                   1062:   if ((desc = desc_cr))
                   1063:     {
                   1064:       if (!desc->str)
                   1065:        vty_out (vty, "  %-s%s",
                   1066:                 desc->cmd[0] == '.' ? desc->cmd + 1 : desc->cmd,
                   1067:                 VTY_NEWLINE);
                   1068:       else if (desc_width >= strlen (desc->str))
                   1069:        vty_out (vty, "  %-*s  %s%s", width,
                   1070:                 desc->cmd[0] == '.' ? desc->cmd + 1 : desc->cmd,
                   1071:                 desc->str, VTY_NEWLINE);
                   1072:       else
                   1073:        vty_describe_fold (vty, width, desc_width, desc);
                   1074:     }
                   1075: 
                   1076: out:
                   1077:   cmd_free_strvec (vline);
                   1078:   if (describe)
                   1079:     vector_free (describe);
                   1080: 
                   1081:   vty_prompt (vty);
                   1082:   vty_redraw_line (vty);
                   1083: }
                   1084: 
                   1085: static void
                   1086: vty_clear_buf (struct vty *vty)
                   1087: {
                   1088:   memset (vty->buf, 0, vty->max);
                   1089: }
                   1090: 
                   1091: /* ^C stop current input and do not add command line to the history. */
                   1092: static void
                   1093: vty_stop_input (struct vty *vty)
                   1094: {
                   1095:   vty->cp = vty->length = 0;
                   1096:   vty_clear_buf (vty);
                   1097:   vty_out (vty, "%s", VTY_NEWLINE);
                   1098: 
                   1099:   switch (vty->node)
                   1100:     {
                   1101:     case VIEW_NODE:
                   1102:     case ENABLE_NODE:
                   1103:     case RESTRICTED_NODE:
                   1104:       /* Nothing to do. */
                   1105:       break;
                   1106:     case CONFIG_NODE:
                   1107:     case INTERFACE_NODE:
                   1108:     case ZEBRA_NODE:
                   1109:     case RIP_NODE:
                   1110:     case RIPNG_NODE:
1.1.1.2 ! misho    1111:     case BABEL_NODE:
1.1       misho    1112:     case BGP_NODE:
                   1113:     case RMAP_NODE:
                   1114:     case OSPF_NODE:
                   1115:     case OSPF6_NODE:
                   1116:     case ISIS_NODE:
                   1117:     case KEYCHAIN_NODE:
                   1118:     case KEYCHAIN_KEY_NODE:
                   1119:     case MASC_NODE:
                   1120:     case VTY_NODE:
                   1121:       vty_config_unlock (vty);
                   1122:       vty->node = ENABLE_NODE;
                   1123:       break;
                   1124:     default:
                   1125:       /* Unknown node, we have to ignore it. */
                   1126:       break;
                   1127:     }
                   1128:   vty_prompt (vty);
                   1129: 
                   1130:   /* Set history pointer to the latest one. */
                   1131:   vty->hp = vty->hindex;
                   1132: }
                   1133: 
                   1134: /* Add current command line to the history buffer. */
                   1135: static void
                   1136: vty_hist_add (struct vty *vty)
                   1137: {
                   1138:   int index;
                   1139: 
                   1140:   if (vty->length == 0)
                   1141:     return;
                   1142: 
                   1143:   index = vty->hindex ? vty->hindex - 1 : VTY_MAXHIST - 1;
                   1144: 
                   1145:   /* Ignore the same string as previous one. */
                   1146:   if (vty->hist[index])
                   1147:     if (strcmp (vty->buf, vty->hist[index]) == 0)
                   1148:       {
                   1149:       vty->hp = vty->hindex;
                   1150:       return;
                   1151:       }
                   1152: 
                   1153:   /* Insert history entry. */
                   1154:   if (vty->hist[vty->hindex])
                   1155:     XFREE (MTYPE_VTY_HIST, vty->hist[vty->hindex]);
                   1156:   vty->hist[vty->hindex] = XSTRDUP (MTYPE_VTY_HIST, vty->buf);
                   1157: 
                   1158:   /* History index rotation. */
                   1159:   vty->hindex++;
                   1160:   if (vty->hindex == VTY_MAXHIST)
                   1161:     vty->hindex = 0;
                   1162: 
                   1163:   vty->hp = vty->hindex;
                   1164: }
                   1165: 
                   1166: /* #define TELNET_OPTION_DEBUG */
                   1167: 
                   1168: /* Get telnet window size. */
                   1169: static int
                   1170: vty_telnet_option (struct vty *vty, unsigned char *buf, int nbytes)
                   1171: {
                   1172: #ifdef TELNET_OPTION_DEBUG
                   1173:   int i;
                   1174: 
                   1175:   for (i = 0; i < nbytes; i++)
                   1176:     {
                   1177:       switch (buf[i])
                   1178:        {
                   1179:        case IAC:
                   1180:          vty_out (vty, "IAC ");
                   1181:          break;
                   1182:        case WILL:
                   1183:          vty_out (vty, "WILL ");
                   1184:          break;
                   1185:        case WONT:
                   1186:          vty_out (vty, "WONT ");
                   1187:          break;
                   1188:        case DO:
                   1189:          vty_out (vty, "DO ");
                   1190:          break;
                   1191:        case DONT:
                   1192:          vty_out (vty, "DONT ");
                   1193:          break;
                   1194:        case SB:
                   1195:          vty_out (vty, "SB ");
                   1196:          break;
                   1197:        case SE:
                   1198:          vty_out (vty, "SE ");
                   1199:          break;
                   1200:        case TELOPT_ECHO:
                   1201:          vty_out (vty, "TELOPT_ECHO %s", VTY_NEWLINE);
                   1202:          break;
                   1203:        case TELOPT_SGA:
                   1204:          vty_out (vty, "TELOPT_SGA %s", VTY_NEWLINE);
                   1205:          break;
                   1206:        case TELOPT_NAWS:
                   1207:          vty_out (vty, "TELOPT_NAWS %s", VTY_NEWLINE);
                   1208:          break;
                   1209:        default:
                   1210:          vty_out (vty, "%x ", buf[i]);
                   1211:          break;
                   1212:        }
                   1213:     }
                   1214:   vty_out (vty, "%s", VTY_NEWLINE);
                   1215: 
                   1216: #endif /* TELNET_OPTION_DEBUG */
                   1217: 
                   1218:   switch (buf[0])
                   1219:     {
                   1220:     case SB:
                   1221:       vty->sb_len = 0;
                   1222:       vty->iac_sb_in_progress = 1;
                   1223:       return 0;
                   1224:       break;
                   1225:     case SE: 
                   1226:       {
                   1227:        if (!vty->iac_sb_in_progress)
                   1228:          return 0;
                   1229: 
                   1230:        if ((vty->sb_len == 0) || (vty->sb_buf[0] == '\0'))
                   1231:          {
                   1232:            vty->iac_sb_in_progress = 0;
                   1233:            return 0;
                   1234:          }
                   1235:        switch (vty->sb_buf[0])
                   1236:          {
                   1237:          case TELOPT_NAWS:
                   1238:            if (vty->sb_len != TELNET_NAWS_SB_LEN)
                   1239:              zlog_warn("RFC 1073 violation detected: telnet NAWS option "
                   1240:                        "should send %d characters, but we received %lu",
                   1241:                        TELNET_NAWS_SB_LEN, (u_long)vty->sb_len);
                   1242:            else if (sizeof(vty->sb_buf) < TELNET_NAWS_SB_LEN)
                   1243:              zlog_err("Bug detected: sizeof(vty->sb_buf) %lu < %d, "
                   1244:                       "too small to handle the telnet NAWS option",
                   1245:                       (u_long)sizeof(vty->sb_buf), TELNET_NAWS_SB_LEN);
                   1246:            else
                   1247:              {
                   1248:                vty->width = ((vty->sb_buf[1] << 8)|vty->sb_buf[2]);
                   1249:                vty->height = ((vty->sb_buf[3] << 8)|vty->sb_buf[4]);
                   1250: #ifdef TELNET_OPTION_DEBUG
                   1251:                vty_out(vty, "TELNET NAWS window size negotiation completed: "
                   1252:                              "width %d, height %d%s",
                   1253:                        vty->width, vty->height, VTY_NEWLINE);
                   1254: #endif
                   1255:              }
                   1256:            break;
                   1257:          }
                   1258:        vty->iac_sb_in_progress = 0;
                   1259:        return 0;
                   1260:        break;
                   1261:       }
                   1262:     default:
                   1263:       break;
                   1264:     }
                   1265:   return 1;
                   1266: }
                   1267: 
                   1268: /* Execute current command line. */
                   1269: static int
                   1270: vty_execute (struct vty *vty)
                   1271: {
                   1272:   int ret;
                   1273: 
                   1274:   ret = CMD_SUCCESS;
                   1275: 
                   1276:   switch (vty->node)
                   1277:     {
                   1278:     case AUTH_NODE:
                   1279:     case AUTH_ENABLE_NODE:
                   1280:       vty_auth (vty, vty->buf);
                   1281:       break;
                   1282:     default:
                   1283:       ret = vty_command (vty, vty->buf);
                   1284:       if (vty->type == VTY_TERM)
                   1285:        vty_hist_add (vty);
                   1286:       break;
                   1287:     }
                   1288: 
                   1289:   /* Clear command line buffer. */
                   1290:   vty->cp = vty->length = 0;
                   1291:   vty_clear_buf (vty);
                   1292: 
                   1293:   if (vty->status != VTY_CLOSE )
                   1294:     vty_prompt (vty);
                   1295: 
                   1296:   return ret;
                   1297: }
                   1298: 
                   1299: #define CONTROL(X)  ((X) - '@')
                   1300: #define VTY_NORMAL     0
                   1301: #define VTY_PRE_ESCAPE 1
                   1302: #define VTY_ESCAPE     2
                   1303: 
                   1304: /* Escape character command map. */
                   1305: static void
                   1306: vty_escape_map (unsigned char c, struct vty *vty)
                   1307: {
                   1308:   switch (c)
                   1309:     {
                   1310:     case ('A'):
                   1311:       vty_previous_line (vty);
                   1312:       break;
                   1313:     case ('B'):
                   1314:       vty_next_line (vty);
                   1315:       break;
                   1316:     case ('C'):
                   1317:       vty_forward_char (vty);
                   1318:       break;
                   1319:     case ('D'):
                   1320:       vty_backward_char (vty);
                   1321:       break;
                   1322:     default:
                   1323:       break;
                   1324:     }
                   1325: 
                   1326:   /* Go back to normal mode. */
                   1327:   vty->escape = VTY_NORMAL;
                   1328: }
                   1329: 
                   1330: /* Quit print out to the buffer. */
                   1331: static void
                   1332: vty_buffer_reset (struct vty *vty)
                   1333: {
                   1334:   buffer_reset (vty->obuf);
                   1335:   vty_prompt (vty);
                   1336:   vty_redraw_line (vty);
                   1337: }
                   1338: 
                   1339: /* Read data via vty socket. */
                   1340: static int
                   1341: vty_read (struct thread *thread)
                   1342: {
                   1343:   int i;
                   1344:   int nbytes;
                   1345:   unsigned char buf[VTY_READ_BUFSIZ];
                   1346: 
                   1347:   int vty_sock = THREAD_FD (thread);
                   1348:   struct vty *vty = THREAD_ARG (thread);
                   1349:   vty->t_read = NULL;
                   1350: 
                   1351:   /* Read raw data from socket */
                   1352:   if ((nbytes = read (vty->fd, buf, VTY_READ_BUFSIZ)) <= 0)
                   1353:     {
                   1354:       if (nbytes < 0)
                   1355:        {
                   1356:          if (ERRNO_IO_RETRY(errno))
                   1357:            {
                   1358:              vty_event (VTY_READ, vty_sock, vty);
                   1359:              return 0;
                   1360:            }
                   1361:          vty->monitor = 0; /* disable monitoring to avoid infinite recursion */
                   1362:          zlog_warn("%s: read error on vty client fd %d, closing: %s",
                   1363:                    __func__, vty->fd, safe_strerror(errno));
                   1364:        }
                   1365:       buffer_reset(vty->obuf);
                   1366:       vty->status = VTY_CLOSE;
                   1367:     }
                   1368: 
                   1369:   for (i = 0; i < nbytes; i++) 
                   1370:     {
                   1371:       if (buf[i] == IAC)
                   1372:        {
                   1373:          if (!vty->iac)
                   1374:            {
                   1375:              vty->iac = 1;
                   1376:              continue;
                   1377:            }
                   1378:          else
                   1379:            {
                   1380:              vty->iac = 0;
                   1381:            }
                   1382:        }
                   1383:       
                   1384:       if (vty->iac_sb_in_progress && !vty->iac)
                   1385:        {
                   1386:            if (vty->sb_len < sizeof(vty->sb_buf))
                   1387:              vty->sb_buf[vty->sb_len] = buf[i];
                   1388:            vty->sb_len++;
                   1389:            continue;
                   1390:        }
                   1391: 
                   1392:       if (vty->iac)
                   1393:        {
                   1394:          /* In case of telnet command */
                   1395:          int ret = 0;
                   1396:          ret = vty_telnet_option (vty, buf + i, nbytes - i);
                   1397:          vty->iac = 0;
                   1398:          i += ret;
                   1399:          continue;
                   1400:        }
                   1401:                
                   1402: 
                   1403:       if (vty->status == VTY_MORE)
                   1404:        {
                   1405:          switch (buf[i])
                   1406:            {
                   1407:            case CONTROL('C'):
                   1408:            case 'q':
                   1409:            case 'Q':
                   1410:              vty_buffer_reset (vty);
                   1411:              break;
                   1412: #if 0 /* More line does not work for "show ip bgp".  */
                   1413:            case '\n':
                   1414:            case '\r':
                   1415:              vty->status = VTY_MORELINE;
                   1416:              break;
                   1417: #endif
                   1418:            default:
                   1419:              break;
                   1420:            }
                   1421:          continue;
                   1422:        }
                   1423: 
                   1424:       /* Escape character. */
                   1425:       if (vty->escape == VTY_ESCAPE)
                   1426:        {
                   1427:          vty_escape_map (buf[i], vty);
                   1428:          continue;
                   1429:        }
                   1430: 
                   1431:       /* Pre-escape status. */
                   1432:       if (vty->escape == VTY_PRE_ESCAPE)
                   1433:        {
                   1434:          switch (buf[i])
                   1435:            {
                   1436:            case '[':
                   1437:              vty->escape = VTY_ESCAPE;
                   1438:              break;
                   1439:            case 'b':
                   1440:              vty_backward_word (vty);
                   1441:              vty->escape = VTY_NORMAL;
                   1442:              break;
                   1443:            case 'f':
                   1444:              vty_forward_word (vty);
                   1445:              vty->escape = VTY_NORMAL;
                   1446:              break;
                   1447:            case 'd':
                   1448:              vty_forward_kill_word (vty);
                   1449:              vty->escape = VTY_NORMAL;
                   1450:              break;
                   1451:            case CONTROL('H'):
                   1452:            case 0x7f:
                   1453:              vty_backward_kill_word (vty);
                   1454:              vty->escape = VTY_NORMAL;
                   1455:              break;
                   1456:            default:
                   1457:              vty->escape = VTY_NORMAL;
                   1458:              break;
                   1459:            }
                   1460:          continue;
                   1461:        }
                   1462: 
                   1463:       switch (buf[i])
                   1464:        {
                   1465:        case CONTROL('A'):
                   1466:          vty_beginning_of_line (vty);
                   1467:          break;
                   1468:        case CONTROL('B'):
                   1469:          vty_backward_char (vty);
                   1470:          break;
                   1471:        case CONTROL('C'):
                   1472:          vty_stop_input (vty);
                   1473:          break;
                   1474:        case CONTROL('D'):
                   1475:          vty_delete_char (vty);
                   1476:          break;
                   1477:        case CONTROL('E'):
                   1478:          vty_end_of_line (vty);
                   1479:          break;
                   1480:        case CONTROL('F'):
                   1481:          vty_forward_char (vty);
                   1482:          break;
                   1483:        case CONTROL('H'):
                   1484:        case 0x7f:
                   1485:          vty_delete_backward_char (vty);
                   1486:          break;
                   1487:        case CONTROL('K'):
                   1488:          vty_kill_line (vty);
                   1489:          break;
                   1490:        case CONTROL('N'):
                   1491:          vty_next_line (vty);
                   1492:          break;
                   1493:        case CONTROL('P'):
                   1494:          vty_previous_line (vty);
                   1495:          break;
                   1496:        case CONTROL('T'):
                   1497:          vty_transpose_chars (vty);
                   1498:          break;
                   1499:        case CONTROL('U'):
                   1500:          vty_kill_line_from_beginning (vty);
                   1501:          break;
                   1502:        case CONTROL('W'):
                   1503:          vty_backward_kill_word (vty);
                   1504:          break;
                   1505:        case CONTROL('Z'):
                   1506:          vty_end_config (vty);
                   1507:          break;
                   1508:        case '\n':
                   1509:        case '\r':
                   1510:          vty_out (vty, "%s", VTY_NEWLINE);
                   1511:          vty_execute (vty);
                   1512:          break;
                   1513:        case '\t':
                   1514:          vty_complete_command (vty);
                   1515:          break;
                   1516:        case '?':
                   1517:          if (vty->node == AUTH_NODE || vty->node == AUTH_ENABLE_NODE)
                   1518:            vty_self_insert (vty, buf[i]);
                   1519:          else
                   1520:            vty_describe_command (vty);
                   1521:          break;
                   1522:        case '\033':
                   1523:          if (i + 1 < nbytes && buf[i + 1] == '[')
                   1524:            {
                   1525:              vty->escape = VTY_ESCAPE;
                   1526:              i++;
                   1527:            }
                   1528:          else
                   1529:            vty->escape = VTY_PRE_ESCAPE;
                   1530:          break;
                   1531:        default:
                   1532:          if (buf[i] > 31 && buf[i] < 127)
                   1533:            vty_self_insert (vty, buf[i]);
                   1534:          break;
                   1535:        }
                   1536:     }
                   1537: 
                   1538:   /* Check status. */
                   1539:   if (vty->status == VTY_CLOSE)
                   1540:     vty_close (vty);
                   1541:   else
                   1542:     {
                   1543:       vty_event (VTY_WRITE, vty_sock, vty);
                   1544:       vty_event (VTY_READ, vty_sock, vty);
                   1545:     }
                   1546:   return 0;
                   1547: }
                   1548: 
                   1549: /* Flush buffer to the vty. */
                   1550: static int
                   1551: vty_flush (struct thread *thread)
                   1552: {
                   1553:   int erase;
                   1554:   buffer_status_t flushrc;
                   1555:   int vty_sock = THREAD_FD (thread);
                   1556:   struct vty *vty = THREAD_ARG (thread);
                   1557: 
                   1558:   vty->t_write = NULL;
                   1559: 
                   1560:   /* Tempolary disable read thread. */
                   1561:   if ((vty->lines == 0) && vty->t_read)
                   1562:     {
                   1563:       thread_cancel (vty->t_read);
                   1564:       vty->t_read = NULL;
                   1565:     }
                   1566: 
                   1567:   /* Function execution continue. */
                   1568:   erase = ((vty->status == VTY_MORE || vty->status == VTY_MORELINE));
                   1569: 
                   1570:   /* N.B. if width is 0, that means we don't know the window size. */
                   1571:   if ((vty->lines == 0) || (vty->width == 0))
                   1572:     flushrc = buffer_flush_available(vty->obuf, vty->fd);
                   1573:   else if (vty->status == VTY_MORELINE)
                   1574:     flushrc = buffer_flush_window(vty->obuf, vty->fd, vty->width,
                   1575:                                  1, erase, 0);
                   1576:   else
                   1577:     flushrc = buffer_flush_window(vty->obuf, vty->fd, vty->width,
                   1578:                                  vty->lines >= 0 ? vty->lines :
                   1579:                                                    vty->height,
                   1580:                                  erase, 0);
                   1581:   switch (flushrc)
                   1582:     {
                   1583:     case BUFFER_ERROR:
                   1584:       vty->monitor = 0; /* disable monitoring to avoid infinite recursion */
                   1585:       zlog_warn("buffer_flush failed on vty client fd %d, closing",
                   1586:                vty->fd);
                   1587:       buffer_reset(vty->obuf);
                   1588:       vty_close(vty);
                   1589:       return 0;
                   1590:     case BUFFER_EMPTY:
                   1591:       if (vty->status == VTY_CLOSE)
                   1592:        vty_close (vty);
                   1593:       else
                   1594:        {
                   1595:          vty->status = VTY_NORMAL;
                   1596:          if (vty->lines == 0)
                   1597:            vty_event (VTY_READ, vty_sock, vty);
                   1598:        }
                   1599:       break;
                   1600:     case BUFFER_PENDING:
                   1601:       /* There is more data waiting to be written. */
                   1602:       vty->status = VTY_MORE;
                   1603:       if (vty->lines == 0)
                   1604:        vty_event (VTY_WRITE, vty_sock, vty);
                   1605:       break;
                   1606:     }
                   1607: 
                   1608:   return 0;
                   1609: }
                   1610: 
                   1611: /* Create new vty structure. */
                   1612: static struct vty *
                   1613: vty_create (int vty_sock, union sockunion *su)
                   1614: {
                   1615:   struct vty *vty;
                   1616: 
                   1617:   /* Allocate new vty structure and set up default values. */
                   1618:   vty = vty_new ();
                   1619:   vty->fd = vty_sock;
                   1620:   vty->type = VTY_TERM;
                   1621:   vty->address = sockunion_su2str (su);
                   1622:   if (no_password_check)
                   1623:     {
                   1624:       if (restricted_mode)
                   1625:         vty->node = RESTRICTED_NODE;
                   1626:       else if (host.advanced)
                   1627:        vty->node = ENABLE_NODE;
                   1628:       else
                   1629:        vty->node = VIEW_NODE;
                   1630:     }
                   1631:   else
                   1632:     vty->node = AUTH_NODE;
                   1633:   vty->fail = 0;
                   1634:   vty->cp = 0;
                   1635:   vty_clear_buf (vty);
                   1636:   vty->length = 0;
                   1637:   memset (vty->hist, 0, sizeof (vty->hist));
                   1638:   vty->hp = 0;
                   1639:   vty->hindex = 0;
                   1640:   vector_set_index (vtyvec, vty_sock, vty);
                   1641:   vty->status = VTY_NORMAL;
                   1642:   vty->v_timeout = vty_timeout_val;
                   1643:   if (host.lines >= 0)
                   1644:     vty->lines = host.lines;
                   1645:   else
                   1646:     vty->lines = -1;
                   1647:   vty->iac = 0;
                   1648:   vty->iac_sb_in_progress = 0;
                   1649:   vty->sb_len = 0;
                   1650: 
                   1651:   if (! no_password_check)
                   1652:     {
                   1653:       /* Vty is not available if password isn't set. */
                   1654:       if (host.password == NULL && host.password_encrypt == NULL)
                   1655:        {
                   1656:          vty_out (vty, "Vty password is not set.%s", VTY_NEWLINE);
                   1657:          vty->status = VTY_CLOSE;
                   1658:          vty_close (vty);
                   1659:          return NULL;
                   1660:        }
                   1661:     }
                   1662: 
                   1663:   /* Say hello to the world. */
                   1664:   vty_hello (vty);
                   1665:   if (! no_password_check)
                   1666:     vty_out (vty, "%sUser Access Verification%s%s", VTY_NEWLINE, VTY_NEWLINE, VTY_NEWLINE);
                   1667: 
                   1668:   /* Setting up terminal. */
                   1669:   vty_will_echo (vty);
                   1670:   vty_will_suppress_go_ahead (vty);
                   1671: 
                   1672:   vty_dont_linemode (vty);
                   1673:   vty_do_window_size (vty);
                   1674:   /* vty_dont_lflow_ahead (vty); */
                   1675: 
                   1676:   vty_prompt (vty);
                   1677: 
                   1678:   /* Add read/write thread. */
                   1679:   vty_event (VTY_WRITE, vty_sock, vty);
                   1680:   vty_event (VTY_READ, vty_sock, vty);
                   1681: 
                   1682:   return vty;
                   1683: }
                   1684: 
                   1685: /* Accept connection from the network. */
                   1686: static int
                   1687: vty_accept (struct thread *thread)
                   1688: {
                   1689:   int vty_sock;
                   1690:   union sockunion su;
                   1691:   int ret;
                   1692:   unsigned int on;
                   1693:   int accept_sock;
                   1694:   struct prefix *p = NULL;
                   1695:   struct access_list *acl = NULL;
                   1696:   char *bufp;
                   1697: 
                   1698:   accept_sock = THREAD_FD (thread);
                   1699: 
                   1700:   /* We continue hearing vty socket. */
                   1701:   vty_event (VTY_SERV, accept_sock, NULL);
                   1702: 
                   1703:   memset (&su, 0, sizeof (union sockunion));
                   1704: 
                   1705:   /* We can handle IPv4 or IPv6 socket. */
                   1706:   vty_sock = sockunion_accept (accept_sock, &su);
                   1707:   if (vty_sock < 0)
                   1708:     {
                   1709:       zlog_warn ("can't accept vty socket : %s", safe_strerror (errno));
                   1710:       return -1;
                   1711:     }
                   1712:   set_nonblocking(vty_sock);
                   1713: 
                   1714:   p = sockunion2hostprefix (&su);
                   1715: 
                   1716:   /* VTY's accesslist apply. */
                   1717:   if (p->family == AF_INET && vty_accesslist_name)
                   1718:     {
                   1719:       if ((acl = access_list_lookup (AFI_IP, vty_accesslist_name)) &&
                   1720:          (access_list_apply (acl, p) == FILTER_DENY))
                   1721:        {
                   1722:          char *buf;
                   1723:          zlog (NULL, LOG_INFO, "Vty connection refused from %s",
                   1724:                (buf = sockunion_su2str (&su)));
                   1725:          free (buf);
                   1726:          close (vty_sock);
                   1727:          
                   1728:          /* continue accepting connections */
                   1729:          vty_event (VTY_SERV, accept_sock, NULL);
                   1730:          
                   1731:          prefix_free (p);
                   1732: 
                   1733:          return 0;
                   1734:        }
                   1735:     }
                   1736: 
                   1737: #ifdef HAVE_IPV6
                   1738:   /* VTY's ipv6 accesslist apply. */
                   1739:   if (p->family == AF_INET6 && vty_ipv6_accesslist_name)
                   1740:     {
                   1741:       if ((acl = access_list_lookup (AFI_IP6, vty_ipv6_accesslist_name)) &&
                   1742:          (access_list_apply (acl, p) == FILTER_DENY))
                   1743:        {
                   1744:          char *buf;
                   1745:          zlog (NULL, LOG_INFO, "Vty connection refused from %s",
                   1746:                (buf = sockunion_su2str (&su)));
                   1747:          free (buf);
                   1748:          close (vty_sock);
                   1749:          
                   1750:          /* continue accepting connections */
                   1751:          vty_event (VTY_SERV, accept_sock, NULL);
                   1752:          
                   1753:          prefix_free (p);
                   1754: 
                   1755:          return 0;
                   1756:        }
                   1757:     }
                   1758: #endif /* HAVE_IPV6 */
                   1759:   
                   1760:   prefix_free (p);
                   1761: 
                   1762:   on = 1;
                   1763:   ret = setsockopt (vty_sock, IPPROTO_TCP, TCP_NODELAY, 
                   1764:                    (char *) &on, sizeof (on));
                   1765:   if (ret < 0)
                   1766:     zlog (NULL, LOG_INFO, "can't set sockopt to vty_sock : %s", 
                   1767:          safe_strerror (errno));
                   1768: 
                   1769:   zlog (NULL, LOG_INFO, "Vty connection from %s",
                   1770:     (bufp = sockunion_su2str (&su)));
                   1771:   if (bufp)
                   1772:     XFREE (MTYPE_TMP, bufp);
                   1773: 
1.1.1.2 ! misho    1774:   vty_create (vty_sock, &su);
1.1       misho    1775: 
                   1776:   return 0;
                   1777: }
                   1778: 
                   1779: #if defined(HAVE_IPV6) && !defined(NRL)
                   1780: static void
                   1781: vty_serv_sock_addrinfo (const char *hostname, unsigned short port)
                   1782: {
                   1783:   int ret;
                   1784:   struct addrinfo req;
                   1785:   struct addrinfo *ainfo;
                   1786:   struct addrinfo *ainfo_save;
                   1787:   int sock;
                   1788:   char port_str[BUFSIZ];
                   1789: 
                   1790:   memset (&req, 0, sizeof (struct addrinfo));
                   1791:   req.ai_flags = AI_PASSIVE;
                   1792:   req.ai_family = AF_UNSPEC;
                   1793:   req.ai_socktype = SOCK_STREAM;
                   1794:   sprintf (port_str, "%d", port);
                   1795:   port_str[sizeof (port_str) - 1] = '\0';
                   1796: 
                   1797:   ret = getaddrinfo (hostname, port_str, &req, &ainfo);
                   1798: 
                   1799:   if (ret != 0)
                   1800:     {
                   1801:       fprintf (stderr, "getaddrinfo failed: %s\n", gai_strerror (ret));
                   1802:       exit (1);
                   1803:     }
                   1804: 
                   1805:   ainfo_save = ainfo;
                   1806: 
                   1807:   do
                   1808:     {
                   1809:       if (ainfo->ai_family != AF_INET
                   1810: #ifdef HAVE_IPV6
                   1811:          && ainfo->ai_family != AF_INET6
                   1812: #endif /* HAVE_IPV6 */
                   1813:          )
                   1814:        continue;
                   1815: 
                   1816:       sock = socket (ainfo->ai_family, ainfo->ai_socktype, ainfo->ai_protocol);
                   1817:       if (sock < 0)
                   1818:        continue;
                   1819: 
1.1.1.2 ! misho    1820:       sockopt_v6only (ainfo->ai_family, sock);
1.1       misho    1821:       sockopt_reuseaddr (sock);
                   1822:       sockopt_reuseport (sock);
                   1823: 
                   1824:       ret = bind (sock, ainfo->ai_addr, ainfo->ai_addrlen);
                   1825:       if (ret < 0)
                   1826:        {
                   1827:          close (sock); /* Avoid sd leak. */
                   1828:        continue;
                   1829:        }
                   1830: 
                   1831:       ret = listen (sock, 3);
                   1832:       if (ret < 0) 
                   1833:        {
                   1834:          close (sock); /* Avoid sd leak. */
                   1835:        continue;
                   1836:        }
                   1837: 
                   1838:       vty_event (VTY_SERV, sock, NULL);
                   1839:     }
                   1840:   while ((ainfo = ainfo->ai_next) != NULL);
                   1841: 
                   1842:   freeaddrinfo (ainfo_save);
                   1843: }
1.1.1.2 ! misho    1844: #else /* HAVE_IPV6 && ! NRL */
1.1       misho    1845: 
                   1846: /* Make vty server socket. */
                   1847: static void
                   1848: vty_serv_sock_family (const char* addr, unsigned short port, int family)
                   1849: {
                   1850:   int ret;
                   1851:   union sockunion su;
                   1852:   int accept_sock;
                   1853:   void* naddr=NULL;
                   1854: 
                   1855:   memset (&su, 0, sizeof (union sockunion));
                   1856:   su.sa.sa_family = family;
                   1857:   if(addr)
                   1858:     switch(family)
                   1859:     {
                   1860:       case AF_INET:
                   1861:         naddr=&su.sin.sin_addr;
                   1862: #ifdef HAVE_IPV6
                   1863:       case AF_INET6:
                   1864:         naddr=&su.sin6.sin6_addr;
                   1865: #endif 
                   1866:     }
                   1867: 
                   1868:   if(naddr)
                   1869:     switch(inet_pton(family,addr,naddr))
                   1870:     {
                   1871:       case -1:
                   1872:         zlog_err("bad address %s",addr);
                   1873:        naddr=NULL;
                   1874:        break;
                   1875:       case 0:
                   1876:         zlog_err("error translating address %s: %s",addr,safe_strerror(errno));
                   1877:        naddr=NULL;
                   1878:     }
                   1879: 
                   1880:   /* Make new socket. */
                   1881:   accept_sock = sockunion_stream_socket (&su);
                   1882:   if (accept_sock < 0)
                   1883:     return;
                   1884: 
                   1885:   /* This is server, so reuse address. */
                   1886:   sockopt_reuseaddr (accept_sock);
                   1887:   sockopt_reuseport (accept_sock);
                   1888: 
                   1889:   /* Bind socket to universal address and given port. */
                   1890:   ret = sockunion_bind (accept_sock, &su, port, naddr);
                   1891:   if (ret < 0)
                   1892:     {
                   1893:       zlog_warn("can't bind socket");
                   1894:       close (accept_sock);     /* Avoid sd leak. */
                   1895:       return;
                   1896:     }
                   1897: 
                   1898:   /* Listen socket under queue 3. */
                   1899:   ret = listen (accept_sock, 3);
                   1900:   if (ret < 0) 
                   1901:     {
                   1902:       zlog (NULL, LOG_WARNING, "can't listen socket");
                   1903:       close (accept_sock);     /* Avoid sd leak. */
                   1904:       return;
                   1905:     }
                   1906: 
                   1907:   /* Add vty server event. */
                   1908:   vty_event (VTY_SERV, accept_sock, NULL);
                   1909: }
1.1.1.2 ! misho    1910: #endif /* HAVE_IPV6 && ! NRL */
1.1       misho    1911: 
                   1912: #ifdef VTYSH
                   1913: /* For sockaddr_un. */
                   1914: #include <sys/un.h>
                   1915: 
                   1916: /* VTY shell UNIX domain socket. */
                   1917: static void
                   1918: vty_serv_un (const char *path)
                   1919: {
                   1920:   int ret;
                   1921:   int sock, len;
                   1922:   struct sockaddr_un serv;
                   1923:   mode_t old_mask;
                   1924:   struct zprivs_ids_t ids;
                   1925:   
                   1926:   /* First of all, unlink existing socket */
                   1927:   unlink (path);
                   1928: 
                   1929:   /* Set umask */
                   1930:   old_mask = umask (0007);
                   1931: 
                   1932:   /* Make UNIX domain socket. */
                   1933:   sock = socket (AF_UNIX, SOCK_STREAM, 0);
                   1934:   if (sock < 0)
                   1935:     {
                   1936:       zlog_err("Cannot create unix stream socket: %s", safe_strerror(errno));
                   1937:       return;
                   1938:     }
                   1939: 
                   1940:   /* Make server socket. */
                   1941:   memset (&serv, 0, sizeof (struct sockaddr_un));
                   1942:   serv.sun_family = AF_UNIX;
                   1943:   strncpy (serv.sun_path, path, strlen (path));
                   1944: #ifdef HAVE_STRUCT_SOCKADDR_UN_SUN_LEN
                   1945:   len = serv.sun_len = SUN_LEN(&serv);
                   1946: #else
                   1947:   len = sizeof (serv.sun_family) + strlen (serv.sun_path);
                   1948: #endif /* HAVE_STRUCT_SOCKADDR_UN_SUN_LEN */
                   1949: 
                   1950:   ret = bind (sock, (struct sockaddr *) &serv, len);
                   1951:   if (ret < 0)
                   1952:     {
                   1953:       zlog_err("Cannot bind path %s: %s", path, safe_strerror(errno));
                   1954:       close (sock);    /* Avoid sd leak. */
                   1955:       return;
                   1956:     }
                   1957: 
                   1958:   ret = listen (sock, 5);
                   1959:   if (ret < 0)
                   1960:     {
                   1961:       zlog_err("listen(fd %d) failed: %s", sock, safe_strerror(errno));
                   1962:       close (sock);    /* Avoid sd leak. */
                   1963:       return;
                   1964:     }
                   1965: 
                   1966:   umask (old_mask);
                   1967: 
                   1968:   zprivs_get_ids(&ids);
                   1969:   
                   1970:   if (ids.gid_vty > 0)
                   1971:     {
                   1972:       /* set group of socket */
                   1973:       if ( chown (path, -1, ids.gid_vty) )
                   1974:         {
                   1975:           zlog_err ("vty_serv_un: could chown socket, %s",
                   1976:                      safe_strerror (errno) );
                   1977:         }
                   1978:     }
                   1979: 
                   1980:   vty_event (VTYSH_SERV, sock, NULL);
                   1981: }
                   1982: 
                   1983: /* #define VTYSH_DEBUG 1 */
                   1984: 
                   1985: static int
                   1986: vtysh_accept (struct thread *thread)
                   1987: {
                   1988:   int accept_sock;
                   1989:   int sock;
                   1990:   int client_len;
                   1991:   struct sockaddr_un client;
                   1992:   struct vty *vty;
                   1993:   
                   1994:   accept_sock = THREAD_FD (thread);
                   1995: 
                   1996:   vty_event (VTYSH_SERV, accept_sock, NULL);
                   1997: 
                   1998:   memset (&client, 0, sizeof (struct sockaddr_un));
                   1999:   client_len = sizeof (struct sockaddr_un);
                   2000: 
                   2001:   sock = accept (accept_sock, (struct sockaddr *) &client,
                   2002:                 (socklen_t *) &client_len);
                   2003: 
                   2004:   if (sock < 0)
                   2005:     {
                   2006:       zlog_warn ("can't accept vty socket : %s", safe_strerror (errno));
                   2007:       return -1;
                   2008:     }
                   2009: 
                   2010:   if (set_nonblocking(sock) < 0)
                   2011:     {
                   2012:       zlog_warn ("vtysh_accept: could not set vty socket %d to non-blocking,"
                   2013:                  " %s, closing", sock, safe_strerror (errno));
                   2014:       close (sock);
                   2015:       return -1;
                   2016:     }
                   2017:   
                   2018: #ifdef VTYSH_DEBUG
                   2019:   printf ("VTY shell accept\n");
                   2020: #endif /* VTYSH_DEBUG */
                   2021: 
                   2022:   vty = vty_new ();
                   2023:   vty->fd = sock;
                   2024:   vty->type = VTY_SHELL_SERV;
                   2025:   vty->node = VIEW_NODE;
                   2026: 
                   2027:   vty_event (VTYSH_READ, sock, vty);
                   2028: 
                   2029:   return 0;
                   2030: }
                   2031: 
                   2032: static int
                   2033: vtysh_flush(struct vty *vty)
                   2034: {
                   2035:   switch (buffer_flush_available(vty->obuf, vty->fd))
                   2036:     {
                   2037:     case BUFFER_PENDING:
                   2038:       vty_event(VTYSH_WRITE, vty->fd, vty);
                   2039:       break;
                   2040:     case BUFFER_ERROR:
                   2041:       vty->monitor = 0; /* disable monitoring to avoid infinite recursion */
                   2042:       zlog_warn("%s: write error to fd %d, closing", __func__, vty->fd);
                   2043:       buffer_reset(vty->obuf);
                   2044:       vty_close(vty);
                   2045:       return -1;
                   2046:       break;
                   2047:     case BUFFER_EMPTY:
                   2048:       break;
                   2049:     }
                   2050:   return 0;
                   2051: }
                   2052: 
                   2053: static int
                   2054: vtysh_read (struct thread *thread)
                   2055: {
                   2056:   int ret;
                   2057:   int sock;
                   2058:   int nbytes;
                   2059:   struct vty *vty;
                   2060:   unsigned char buf[VTY_READ_BUFSIZ];
                   2061:   unsigned char *p;
                   2062:   u_char header[4] = {0, 0, 0, 0};
                   2063: 
                   2064:   sock = THREAD_FD (thread);
                   2065:   vty = THREAD_ARG (thread);
                   2066:   vty->t_read = NULL;
                   2067: 
                   2068:   if ((nbytes = read (sock, buf, VTY_READ_BUFSIZ)) <= 0)
                   2069:     {
                   2070:       if (nbytes < 0)
                   2071:        {
                   2072:          if (ERRNO_IO_RETRY(errno))
                   2073:            {
                   2074:              vty_event (VTYSH_READ, sock, vty);
                   2075:              return 0;
                   2076:            }
                   2077:          vty->monitor = 0; /* disable monitoring to avoid infinite recursion */
                   2078:          zlog_warn("%s: read failed on vtysh client fd %d, closing: %s",
                   2079:                    __func__, sock, safe_strerror(errno));
                   2080:        }
                   2081:       buffer_reset(vty->obuf);
                   2082:       vty_close (vty);
                   2083: #ifdef VTYSH_DEBUG
                   2084:       printf ("close vtysh\n");
                   2085: #endif /* VTYSH_DEBUG */
                   2086:       return 0;
                   2087:     }
                   2088: 
                   2089: #ifdef VTYSH_DEBUG
                   2090:   printf ("line: %.*s\n", nbytes, buf);
                   2091: #endif /* VTYSH_DEBUG */
                   2092: 
                   2093:   for (p = buf; p < buf+nbytes; p++)
                   2094:     {
                   2095:       vty_ensure(vty, vty->length+1);
                   2096:       vty->buf[vty->length++] = *p;
                   2097:       if (*p == '\0')
                   2098:        {
                   2099:          /* Pass this line to parser. */
                   2100:          ret = vty_execute (vty);
                   2101:          /* Note that vty_execute clears the command buffer and resets
                   2102:             vty->length to 0. */
                   2103: 
                   2104:          /* Return result. */
                   2105: #ifdef VTYSH_DEBUG
                   2106:          printf ("result: %d\n", ret);
                   2107:          printf ("vtysh node: %d\n", vty->node);
                   2108: #endif /* VTYSH_DEBUG */
                   2109: 
                   2110:          header[3] = ret;
                   2111:          buffer_put(vty->obuf, header, 4);
                   2112: 
                   2113:          if (!vty->t_write && (vtysh_flush(vty) < 0))
                   2114:            /* Try to flush results; exit if a write error occurs. */
                   2115:            return 0;
                   2116:        }
                   2117:     }
                   2118: 
                   2119:   vty_event (VTYSH_READ, sock, vty);
                   2120: 
                   2121:   return 0;
                   2122: }
                   2123: 
                   2124: static int
                   2125: vtysh_write (struct thread *thread)
                   2126: {
                   2127:   struct vty *vty = THREAD_ARG (thread);
                   2128: 
                   2129:   vty->t_write = NULL;
                   2130:   vtysh_flush(vty);
                   2131:   return 0;
                   2132: }
                   2133: 
                   2134: #endif /* VTYSH */
                   2135: 
                   2136: /* Determine address family to bind. */
                   2137: void
                   2138: vty_serv_sock (const char *addr, unsigned short port, const char *path)
                   2139: {
                   2140:   /* If port is set to 0, do not listen on TCP/IP at all! */
                   2141:   if (port)
                   2142:     {
                   2143: 
                   2144: #ifdef HAVE_IPV6
                   2145: #ifdef NRL
                   2146:       vty_serv_sock_family (addr, port, AF_INET);
                   2147:       vty_serv_sock_family (addr, port, AF_INET6);
                   2148: #else /* ! NRL */
                   2149:       vty_serv_sock_addrinfo (addr, port);
                   2150: #endif /* NRL*/
                   2151: #else /* ! HAVE_IPV6 */
                   2152:       vty_serv_sock_family (addr,port, AF_INET);
                   2153: #endif /* HAVE_IPV6 */
                   2154:     }
                   2155: 
                   2156: #ifdef VTYSH
                   2157:   vty_serv_un (path);
                   2158: #endif /* VTYSH */
                   2159: }
                   2160: 
                   2161: /* Close vty interface.  Warning: call this only from functions that
                   2162:    will be careful not to access the vty afterwards (since it has
                   2163:    now been freed).  This is safest from top-level functions (called
                   2164:    directly by the thread dispatcher). */
                   2165: void
                   2166: vty_close (struct vty *vty)
                   2167: {
                   2168:   int i;
                   2169: 
                   2170:   /* Cancel threads.*/
                   2171:   if (vty->t_read)
                   2172:     thread_cancel (vty->t_read);
                   2173:   if (vty->t_write)
                   2174:     thread_cancel (vty->t_write);
                   2175:   if (vty->t_timeout)
                   2176:     thread_cancel (vty->t_timeout);
                   2177: 
                   2178:   /* Flush buffer. */
                   2179:   buffer_flush_all (vty->obuf, vty->fd);
                   2180: 
                   2181:   /* Free input buffer. */
                   2182:   buffer_free (vty->obuf);
                   2183: 
                   2184:   /* Free command history. */
                   2185:   for (i = 0; i < VTY_MAXHIST; i++)
                   2186:     if (vty->hist[i])
                   2187:       XFREE (MTYPE_VTY_HIST, vty->hist[i]);
                   2188: 
                   2189:   /* Unset vector. */
                   2190:   vector_unset (vtyvec, vty->fd);
                   2191: 
                   2192:   /* Close socket. */
                   2193:   if (vty->fd > 0)
                   2194:     close (vty->fd);
                   2195: 
                   2196:   if (vty->address)
                   2197:     XFREE (MTYPE_TMP, vty->address);
                   2198:   if (vty->buf)
                   2199:     XFREE (MTYPE_VTY, vty->buf);
                   2200: 
                   2201:   /* Check configure. */
                   2202:   vty_config_unlock (vty);
                   2203: 
                   2204:   /* OK free vty. */
                   2205:   XFREE (MTYPE_VTY, vty);
                   2206: }
                   2207: 
                   2208: /* When time out occur output message then close connection. */
                   2209: static int
                   2210: vty_timeout (struct thread *thread)
                   2211: {
                   2212:   struct vty *vty;
                   2213: 
                   2214:   vty = THREAD_ARG (thread);
                   2215:   vty->t_timeout = NULL;
                   2216:   vty->v_timeout = 0;
                   2217: 
                   2218:   /* Clear buffer*/
                   2219:   buffer_reset (vty->obuf);
                   2220:   vty_out (vty, "%sVty connection is timed out.%s", VTY_NEWLINE, VTY_NEWLINE);
                   2221: 
                   2222:   /* Close connection. */
                   2223:   vty->status = VTY_CLOSE;
                   2224:   vty_close (vty);
                   2225: 
                   2226:   return 0;
                   2227: }
                   2228: 
                   2229: /* Read up configuration file from file_name. */
                   2230: static void
                   2231: vty_read_file (FILE *confp)
                   2232: {
                   2233:   int ret;
                   2234:   struct vty *vty;
                   2235: 
                   2236:   vty = vty_new ();
                   2237:   vty->fd = 0;                 /* stdout */
                   2238:   vty->type = VTY_TERM;
                   2239:   vty->node = CONFIG_NODE;
                   2240:   
                   2241:   /* Execute configuration file */
                   2242:   ret = config_from_file (vty, confp);
                   2243: 
                   2244:   if ( !((ret == CMD_SUCCESS) || (ret == CMD_ERR_NOTHING_TODO)) ) 
                   2245:     {
                   2246:       switch (ret)
                   2247:        {
                   2248:          case CMD_ERR_AMBIGUOUS:
                   2249:            fprintf (stderr, "Ambiguous command.\n");
                   2250:            break;
                   2251:          case CMD_ERR_NO_MATCH:
                   2252:            fprintf (stderr, "There is no such command.\n");
                   2253:            break;
                   2254:        }
                   2255:       fprintf (stderr, "Error occured during reading below line.\n%s\n", 
                   2256:               vty->buf);
                   2257:       vty_close (vty);
                   2258:       exit (1);
                   2259:     }
                   2260: 
                   2261:   vty_close (vty);
                   2262: }
                   2263: 
                   2264: static FILE *
                   2265: vty_use_backup_config (char *fullpath)
                   2266: {
                   2267:   char *fullpath_sav, *fullpath_tmp;
                   2268:   FILE *ret = NULL;
                   2269:   struct stat buf;
                   2270:   int tmp, sav;
                   2271:   int c;
                   2272:   char buffer[512];
                   2273:   
                   2274:   fullpath_sav = malloc (strlen (fullpath) + strlen (CONF_BACKUP_EXT) + 1);
                   2275:   strcpy (fullpath_sav, fullpath);
                   2276:   strcat (fullpath_sav, CONF_BACKUP_EXT);
                   2277:   if (stat (fullpath_sav, &buf) == -1)
                   2278:     {
                   2279:       free (fullpath_sav);
                   2280:       return NULL;
                   2281:     }
                   2282: 
                   2283:   fullpath_tmp = malloc (strlen (fullpath) + 8);
                   2284:   sprintf (fullpath_tmp, "%s.XXXXXX", fullpath);
                   2285:   
                   2286:   /* Open file to configuration write. */
                   2287:   tmp = mkstemp (fullpath_tmp);
                   2288:   if (tmp < 0)
                   2289:     {
                   2290:       free (fullpath_sav);
                   2291:       free (fullpath_tmp);
                   2292:       return NULL;
                   2293:     }
                   2294: 
                   2295:   sav = open (fullpath_sav, O_RDONLY);
                   2296:   if (sav < 0)
                   2297:     {
                   2298:       unlink (fullpath_tmp);
                   2299:       free (fullpath_sav);
                   2300:       free (fullpath_tmp);
                   2301:       return NULL;
                   2302:     }
                   2303:   
                   2304:   while((c = read (sav, buffer, 512)) > 0)
                   2305:     write (tmp, buffer, c);
                   2306:   
                   2307:   close (sav);
                   2308:   close (tmp);
                   2309:   
                   2310:   if (chmod(fullpath_tmp, CONFIGFILE_MASK) != 0)
                   2311:     {
                   2312:       unlink (fullpath_tmp);
                   2313:       free (fullpath_sav);
                   2314:       free (fullpath_tmp);
                   2315:       return NULL;
                   2316:     }
                   2317:   
                   2318:   if (link (fullpath_tmp, fullpath) == 0)
                   2319:     ret = fopen (fullpath, "r");
                   2320: 
                   2321:   unlink (fullpath_tmp);
                   2322:   
                   2323:   free (fullpath_sav);
                   2324:   free (fullpath_tmp);
                   2325:   return ret;
                   2326: }
                   2327: 
                   2328: /* Read up configuration file from file_name. */
                   2329: void
                   2330: vty_read_config (char *config_file,
                   2331:                  char *config_default_dir)
                   2332: {
                   2333:   char cwd[MAXPATHLEN];
                   2334:   FILE *confp = NULL;
                   2335:   char *fullpath;
                   2336:   char *tmp = NULL;
                   2337: 
                   2338:   /* If -f flag specified. */
                   2339:   if (config_file != NULL)
                   2340:     {
                   2341:       if (! IS_DIRECTORY_SEP (config_file[0]))
                   2342:         {
                   2343:           getcwd (cwd, MAXPATHLEN);
                   2344:           tmp = XMALLOC (MTYPE_TMP, 
                   2345:                              strlen (cwd) + strlen (config_file) + 2);
                   2346:           sprintf (tmp, "%s/%s", cwd, config_file);
                   2347:           fullpath = tmp;
                   2348:         }
                   2349:       else
                   2350:         fullpath = config_file;
                   2351: 
                   2352:       confp = fopen (fullpath, "r");
                   2353: 
                   2354:       if (confp == NULL)
                   2355:         {
                   2356:           fprintf (stderr, "%s: failed to open configuration file %s: %s\n",
                   2357:                    __func__, fullpath, safe_strerror (errno));
                   2358:           
                   2359:           confp = vty_use_backup_config (fullpath);
                   2360:           if (confp)
                   2361:             fprintf (stderr, "WARNING: using backup configuration file!\n");
                   2362:           else
                   2363:             {
                   2364:               fprintf (stderr, "can't open configuration file [%s]\n", 
                   2365:                       config_file);
                   2366:               exit(1);
                   2367:             }
                   2368:         }
                   2369:     }
                   2370:   else
                   2371:     {
                   2372: #ifdef VTYSH
                   2373:       int ret;
                   2374:       struct stat conf_stat;
                   2375: 
                   2376:       /* !!!!PLEASE LEAVE!!!!
                   2377:        * This is NEEDED for use with vtysh -b, or else you can get
                   2378:        * a real configuration food fight with a lot garbage in the
                   2379:        * merged configuration file it creates coming from the per
                   2380:        * daemon configuration files.  This also allows the daemons
                   2381:        * to start if there default configuration file is not
                   2382:        * present or ignore them, as needed when using vtysh -b to
                   2383:        * configure the daemons at boot - MAG
                   2384:        */
                   2385: 
                   2386:       /* Stat for vtysh Zebra.conf, if found startup and wait for
                   2387:        * boot configuration
                   2388:        */
                   2389: 
                   2390:       if ( strstr(config_default_dir, "vtysh") == NULL)
                   2391:         {
                   2392:           ret = stat (integrate_default, &conf_stat);
                   2393:           if (ret >= 0)
                   2394:             return;
                   2395:         }
                   2396: #endif /* VTYSH */
                   2397: 
                   2398:       confp = fopen (config_default_dir, "r");
                   2399:       if (confp == NULL)
                   2400:         {
                   2401:           fprintf (stderr, "%s: failed to open configuration file %s: %s\n",
                   2402:                    __func__, config_default_dir, safe_strerror (errno));
                   2403:           
                   2404:           confp = vty_use_backup_config (config_default_dir);
                   2405:           if (confp)
                   2406:             {
                   2407:               fprintf (stderr, "WARNING: using backup configuration file!\n");
                   2408:               fullpath = config_default_dir;
                   2409:             }
                   2410:           else
                   2411:             {
                   2412:               fprintf (stderr, "can't open configuration file [%s]\n",
                   2413:                                 config_default_dir);
                   2414:                  exit (1);
                   2415:             }
                   2416:         }      
                   2417:       else
                   2418:         fullpath = config_default_dir;
                   2419:     }
                   2420: 
                   2421:   vty_read_file (confp);
                   2422: 
                   2423:   fclose (confp);
                   2424: 
                   2425:   host_config_set (fullpath);
                   2426:   
                   2427:   if (tmp)
                   2428:     XFREE (MTYPE_TMP, fullpath);
                   2429: }
                   2430: 
                   2431: /* Small utility function which output log to the VTY. */
                   2432: void
                   2433: vty_log (const char *level, const char *proto_str,
                   2434:         const char *format, struct timestamp_control *ctl, va_list va)
                   2435: {
                   2436:   unsigned int i;
                   2437:   struct vty *vty;
                   2438:   
                   2439:   if (!vtyvec)
                   2440:     return;
                   2441: 
                   2442:   for (i = 0; i < vector_active (vtyvec); i++)
                   2443:     if ((vty = vector_slot (vtyvec, i)) != NULL)
                   2444:       if (vty->monitor)
                   2445:        {
                   2446:          va_list ac;
                   2447:          va_copy(ac, va);
                   2448:          vty_log_out (vty, level, proto_str, format, ctl, ac);
                   2449:          va_end(ac);
                   2450:        }
                   2451: }
                   2452: 
                   2453: /* Async-signal-safe version of vty_log for fixed strings. */
                   2454: void
                   2455: vty_log_fixed (const char *buf, size_t len)
                   2456: {
                   2457:   unsigned int i;
                   2458:   struct iovec iov[2];
                   2459: 
                   2460:   /* vty may not have been initialised */
                   2461:   if (!vtyvec)
                   2462:     return;
                   2463:   
                   2464:   iov[0].iov_base = (void *)buf;
                   2465:   iov[0].iov_len = len;
                   2466:   iov[1].iov_base = (void *)"\r\n";
                   2467:   iov[1].iov_len = 2;
                   2468: 
                   2469:   for (i = 0; i < vector_active (vtyvec); i++)
                   2470:     {
                   2471:       struct vty *vty;
                   2472:       if (((vty = vector_slot (vtyvec, i)) != NULL) && vty->monitor)
                   2473:        /* N.B. We don't care about the return code, since process is
                   2474:           most likely just about to die anyway. */
                   2475:        writev(vty->fd, iov, 2);
                   2476:     }
                   2477: }
                   2478: 
                   2479: int
                   2480: vty_config_lock (struct vty *vty)
                   2481: {
                   2482:   if (vty_config == 0)
                   2483:     {
                   2484:       vty->config = 1;
                   2485:       vty_config = 1;
                   2486:     }
                   2487:   return vty->config;
                   2488: }
                   2489: 
                   2490: int
                   2491: vty_config_unlock (struct vty *vty)
                   2492: {
                   2493:   if (vty_config == 1 && vty->config == 1)
                   2494:     {
                   2495:       vty->config = 0;
                   2496:       vty_config = 0;
                   2497:     }
                   2498:   return vty->config;
                   2499: }
                   2500: 
                   2501: /* Master of the threads. */
                   2502: static struct thread_master *master;
                   2503: 
                   2504: static void
                   2505: vty_event (enum event event, int sock, struct vty *vty)
                   2506: {
                   2507:   struct thread *vty_serv_thread;
                   2508: 
                   2509:   switch (event)
                   2510:     {
                   2511:     case VTY_SERV:
                   2512:       vty_serv_thread = thread_add_read (master, vty_accept, vty, sock);
                   2513:       vector_set_index (Vvty_serv_thread, sock, vty_serv_thread);
                   2514:       break;
                   2515: #ifdef VTYSH
                   2516:     case VTYSH_SERV:
                   2517:       thread_add_read (master, vtysh_accept, vty, sock);
                   2518:       break;
                   2519:     case VTYSH_READ:
                   2520:       vty->t_read = thread_add_read (master, vtysh_read, vty, sock);
                   2521:       break;
                   2522:     case VTYSH_WRITE:
                   2523:       vty->t_write = thread_add_write (master, vtysh_write, vty, sock);
                   2524:       break;
                   2525: #endif /* VTYSH */
                   2526:     case VTY_READ:
                   2527:       vty->t_read = thread_add_read (master, vty_read, vty, sock);
                   2528: 
                   2529:       /* Time out treatment. */
                   2530:       if (vty->v_timeout)
                   2531:        {
                   2532:          if (vty->t_timeout)
                   2533:            thread_cancel (vty->t_timeout);
                   2534:          vty->t_timeout = 
                   2535:            thread_add_timer (master, vty_timeout, vty, vty->v_timeout);
                   2536:        }
                   2537:       break;
                   2538:     case VTY_WRITE:
                   2539:       if (! vty->t_write)
                   2540:        vty->t_write = thread_add_write (master, vty_flush, vty, sock);
                   2541:       break;
                   2542:     case VTY_TIMEOUT_RESET:
                   2543:       if (vty->t_timeout)
                   2544:        {
                   2545:          thread_cancel (vty->t_timeout);
                   2546:          vty->t_timeout = NULL;
                   2547:        }
                   2548:       if (vty->v_timeout)
                   2549:        {
                   2550:          vty->t_timeout = 
                   2551:            thread_add_timer (master, vty_timeout, vty, vty->v_timeout);
                   2552:        }
                   2553:       break;
                   2554:     }
                   2555: }
                   2556: 
                   2557: DEFUN (config_who,
                   2558:        config_who_cmd,
                   2559:        "who",
                   2560:        "Display who is on vty\n")
                   2561: {
                   2562:   unsigned int i;
                   2563:   struct vty *v;
                   2564: 
                   2565:   for (i = 0; i < vector_active (vtyvec); i++)
                   2566:     if ((v = vector_slot (vtyvec, i)) != NULL)
                   2567:       vty_out (vty, "%svty[%d] connected from %s.%s",
                   2568:               v->config ? "*" : " ",
                   2569:               i, v->address, VTY_NEWLINE);
                   2570:   return CMD_SUCCESS;
                   2571: }
                   2572: 
                   2573: /* Move to vty configuration mode. */
                   2574: DEFUN (line_vty,
                   2575:        line_vty_cmd,
                   2576:        "line vty",
                   2577:        "Configure a terminal line\n"
                   2578:        "Virtual terminal\n")
                   2579: {
                   2580:   vty->node = VTY_NODE;
                   2581:   return CMD_SUCCESS;
                   2582: }
                   2583: 
                   2584: /* Set time out value. */
                   2585: static int
                   2586: exec_timeout (struct vty *vty, const char *min_str, const char *sec_str)
                   2587: {
                   2588:   unsigned long timeout = 0;
                   2589: 
                   2590:   /* min_str and sec_str are already checked by parser.  So it must be
                   2591:      all digit string. */
                   2592:   if (min_str)
                   2593:     {
                   2594:       timeout = strtol (min_str, NULL, 10);
                   2595:       timeout *= 60;
                   2596:     }
                   2597:   if (sec_str)
                   2598:     timeout += strtol (sec_str, NULL, 10);
                   2599: 
                   2600:   vty_timeout_val = timeout;
                   2601:   vty->v_timeout = timeout;
                   2602:   vty_event (VTY_TIMEOUT_RESET, 0, vty);
                   2603: 
                   2604: 
                   2605:   return CMD_SUCCESS;
                   2606: }
                   2607: 
                   2608: DEFUN (exec_timeout_min,
                   2609:        exec_timeout_min_cmd,
                   2610:        "exec-timeout <0-35791>",
                   2611:        "Set timeout value\n"
                   2612:        "Timeout value in minutes\n")
                   2613: {
                   2614:   return exec_timeout (vty, argv[0], NULL);
                   2615: }
                   2616: 
                   2617: DEFUN (exec_timeout_sec,
                   2618:        exec_timeout_sec_cmd,
                   2619:        "exec-timeout <0-35791> <0-2147483>",
                   2620:        "Set the EXEC timeout\n"
                   2621:        "Timeout in minutes\n"
                   2622:        "Timeout in seconds\n")
                   2623: {
                   2624:   return exec_timeout (vty, argv[0], argv[1]);
                   2625: }
                   2626: 
                   2627: DEFUN (no_exec_timeout,
                   2628:        no_exec_timeout_cmd,
                   2629:        "no exec-timeout",
                   2630:        NO_STR
                   2631:        "Set the EXEC timeout\n")
                   2632: {
                   2633:   return exec_timeout (vty, NULL, NULL);
                   2634: }
                   2635: 
                   2636: /* Set vty access class. */
                   2637: DEFUN (vty_access_class,
                   2638:        vty_access_class_cmd,
                   2639:        "access-class WORD",
                   2640:        "Filter connections based on an IP access list\n"
                   2641:        "IP access list\n")
                   2642: {
                   2643:   if (vty_accesslist_name)
                   2644:     XFREE(MTYPE_VTY, vty_accesslist_name);
                   2645: 
                   2646:   vty_accesslist_name = XSTRDUP(MTYPE_VTY, argv[0]);
                   2647: 
                   2648:   return CMD_SUCCESS;
                   2649: }
                   2650: 
                   2651: /* Clear vty access class. */
                   2652: DEFUN (no_vty_access_class,
                   2653:        no_vty_access_class_cmd,
                   2654:        "no access-class [WORD]",
                   2655:        NO_STR
                   2656:        "Filter connections based on an IP access list\n"
                   2657:        "IP access list\n")
                   2658: {
                   2659:   if (! vty_accesslist_name || (argc && strcmp(vty_accesslist_name, argv[0])))
                   2660:     {
                   2661:       vty_out (vty, "Access-class is not currently applied to vty%s",
                   2662:               VTY_NEWLINE);
                   2663:       return CMD_WARNING;
                   2664:     }
                   2665: 
                   2666:   XFREE(MTYPE_VTY, vty_accesslist_name);
                   2667: 
                   2668:   vty_accesslist_name = NULL;
                   2669: 
                   2670:   return CMD_SUCCESS;
                   2671: }
                   2672: 
                   2673: #ifdef HAVE_IPV6
                   2674: /* Set vty access class. */
                   2675: DEFUN (vty_ipv6_access_class,
                   2676:        vty_ipv6_access_class_cmd,
                   2677:        "ipv6 access-class WORD",
                   2678:        IPV6_STR
                   2679:        "Filter connections based on an IP access list\n"
                   2680:        "IPv6 access list\n")
                   2681: {
                   2682:   if (vty_ipv6_accesslist_name)
                   2683:     XFREE(MTYPE_VTY, vty_ipv6_accesslist_name);
                   2684: 
                   2685:   vty_ipv6_accesslist_name = XSTRDUP(MTYPE_VTY, argv[0]);
                   2686: 
                   2687:   return CMD_SUCCESS;
                   2688: }
                   2689: 
                   2690: /* Clear vty access class. */
                   2691: DEFUN (no_vty_ipv6_access_class,
                   2692:        no_vty_ipv6_access_class_cmd,
                   2693:        "no ipv6 access-class [WORD]",
                   2694:        NO_STR
                   2695:        IPV6_STR
                   2696:        "Filter connections based on an IP access list\n"
                   2697:        "IPv6 access list\n")
                   2698: {
                   2699:   if (! vty_ipv6_accesslist_name ||
                   2700:       (argc && strcmp(vty_ipv6_accesslist_name, argv[0])))
                   2701:     {
                   2702:       vty_out (vty, "IPv6 access-class is not currently applied to vty%s",
                   2703:               VTY_NEWLINE);
                   2704:       return CMD_WARNING;
                   2705:     }
                   2706: 
                   2707:   XFREE(MTYPE_VTY, vty_ipv6_accesslist_name);
                   2708: 
                   2709:   vty_ipv6_accesslist_name = NULL;
                   2710: 
                   2711:   return CMD_SUCCESS;
                   2712: }
                   2713: #endif /* HAVE_IPV6 */
                   2714: 
                   2715: /* vty login. */
                   2716: DEFUN (vty_login,
                   2717:        vty_login_cmd,
                   2718:        "login",
                   2719:        "Enable password checking\n")
                   2720: {
                   2721:   no_password_check = 0;
                   2722:   return CMD_SUCCESS;
                   2723: }
                   2724: 
                   2725: DEFUN (no_vty_login,
                   2726:        no_vty_login_cmd,
                   2727:        "no login",
                   2728:        NO_STR
                   2729:        "Enable password checking\n")
                   2730: {
                   2731:   no_password_check = 1;
                   2732:   return CMD_SUCCESS;
                   2733: }
                   2734: 
                   2735: /* initial mode. */
                   2736: DEFUN (vty_restricted_mode,
                   2737:        vty_restricted_mode_cmd,
                   2738:        "anonymous restricted",
                   2739:        "Restrict view commands available in anonymous, unauthenticated vty\n")
                   2740: {
                   2741:   restricted_mode = 1;
                   2742:   return CMD_SUCCESS;
                   2743: }
                   2744: 
                   2745: DEFUN (vty_no_restricted_mode,
                   2746:        vty_no_restricted_mode_cmd,
                   2747:        "no anonymous restricted",
                   2748:        NO_STR
                   2749:        "Enable password checking\n")
                   2750: {
                   2751:   restricted_mode = 0;
                   2752:   return CMD_SUCCESS;
                   2753: }
                   2754: 
                   2755: DEFUN (service_advanced_vty,
                   2756:        service_advanced_vty_cmd,
                   2757:        "service advanced-vty",
                   2758:        "Set up miscellaneous service\n"
                   2759:        "Enable advanced mode vty interface\n")
                   2760: {
                   2761:   host.advanced = 1;
                   2762:   return CMD_SUCCESS;
                   2763: }
                   2764: 
                   2765: DEFUN (no_service_advanced_vty,
                   2766:        no_service_advanced_vty_cmd,
                   2767:        "no service advanced-vty",
                   2768:        NO_STR
                   2769:        "Set up miscellaneous service\n"
                   2770:        "Enable advanced mode vty interface\n")
                   2771: {
                   2772:   host.advanced = 0;
                   2773:   return CMD_SUCCESS;
                   2774: }
                   2775: 
                   2776: DEFUN (terminal_monitor,
                   2777:        terminal_monitor_cmd,
                   2778:        "terminal monitor",
                   2779:        "Set terminal line parameters\n"
                   2780:        "Copy debug output to the current terminal line\n")
                   2781: {
                   2782:   vty->monitor = 1;
                   2783:   return CMD_SUCCESS;
                   2784: }
                   2785: 
                   2786: DEFUN (terminal_no_monitor,
                   2787:        terminal_no_monitor_cmd,
                   2788:        "terminal no monitor",
                   2789:        "Set terminal line parameters\n"
                   2790:        NO_STR
                   2791:        "Copy debug output to the current terminal line\n")
                   2792: {
                   2793:   vty->monitor = 0;
                   2794:   return CMD_SUCCESS;
                   2795: }
                   2796: 
                   2797: ALIAS (terminal_no_monitor,
                   2798:        no_terminal_monitor_cmd,
                   2799:        "no terminal monitor",
                   2800:        NO_STR
                   2801:        "Set terminal line parameters\n"
                   2802:        "Copy debug output to the current terminal line\n")
                   2803: 
                   2804: DEFUN (show_history,
                   2805:        show_history_cmd,
                   2806:        "show history",
                   2807:        SHOW_STR
                   2808:        "Display the session command history\n")
                   2809: {
                   2810:   int index;
                   2811: 
                   2812:   for (index = vty->hindex + 1; index != vty->hindex;)
                   2813:     {
                   2814:       if (index == VTY_MAXHIST)
                   2815:        {
                   2816:          index = 0;
                   2817:          continue;
                   2818:        }
                   2819: 
                   2820:       if (vty->hist[index] != NULL)
                   2821:        vty_out (vty, "  %s%s", vty->hist[index], VTY_NEWLINE);
                   2822: 
                   2823:       index++;
                   2824:     }
                   2825: 
                   2826:   return CMD_SUCCESS;
                   2827: }
                   2828: 
                   2829: /* Display current configuration. */
                   2830: static int
                   2831: vty_config_write (struct vty *vty)
                   2832: {
                   2833:   vty_out (vty, "line vty%s", VTY_NEWLINE);
                   2834: 
                   2835:   if (vty_accesslist_name)
                   2836:     vty_out (vty, " access-class %s%s",
                   2837:             vty_accesslist_name, VTY_NEWLINE);
                   2838: 
                   2839:   if (vty_ipv6_accesslist_name)
                   2840:     vty_out (vty, " ipv6 access-class %s%s",
                   2841:             vty_ipv6_accesslist_name, VTY_NEWLINE);
                   2842: 
                   2843:   /* exec-timeout */
                   2844:   if (vty_timeout_val != VTY_TIMEOUT_DEFAULT)
                   2845:     vty_out (vty, " exec-timeout %ld %ld%s", 
                   2846:             vty_timeout_val / 60,
                   2847:             vty_timeout_val % 60, VTY_NEWLINE);
                   2848: 
                   2849:   /* login */
                   2850:   if (no_password_check)
                   2851:     vty_out (vty, " no login%s", VTY_NEWLINE);
                   2852:     
                   2853:   if (restricted_mode != restricted_mode_default)
                   2854:     {
                   2855:       if (restricted_mode_default)
                   2856:         vty_out (vty, " no anonymous restricted%s", VTY_NEWLINE);
                   2857:       else
                   2858:         vty_out (vty, " anonymous restricted%s", VTY_NEWLINE);
                   2859:     }
                   2860:   
                   2861:   vty_out (vty, "!%s", VTY_NEWLINE);
                   2862: 
                   2863:   return CMD_SUCCESS;
                   2864: }
                   2865: 
                   2866: struct cmd_node vty_node =
                   2867: {
                   2868:   VTY_NODE,
                   2869:   "%s(config-line)# ",
                   2870:   1,
                   2871: };
                   2872: 
                   2873: /* Reset all VTY status. */
                   2874: void
                   2875: vty_reset ()
                   2876: {
                   2877:   unsigned int i;
                   2878:   struct vty *vty;
                   2879:   struct thread *vty_serv_thread;
                   2880: 
                   2881:   for (i = 0; i < vector_active (vtyvec); i++)
                   2882:     if ((vty = vector_slot (vtyvec, i)) != NULL)
                   2883:       {
                   2884:        buffer_reset (vty->obuf);
                   2885:        vty->status = VTY_CLOSE;
                   2886:        vty_close (vty);
                   2887:       }
                   2888: 
                   2889:   for (i = 0; i < vector_active (Vvty_serv_thread); i++)
                   2890:     if ((vty_serv_thread = vector_slot (Vvty_serv_thread, i)) != NULL)
                   2891:       {
                   2892:        thread_cancel (vty_serv_thread);
                   2893:        vector_slot (Vvty_serv_thread, i) = NULL;
                   2894:         close (i);
                   2895:       }
                   2896: 
                   2897:   vty_timeout_val = VTY_TIMEOUT_DEFAULT;
                   2898: 
                   2899:   if (vty_accesslist_name)
                   2900:     {
                   2901:       XFREE(MTYPE_VTY, vty_accesslist_name);
                   2902:       vty_accesslist_name = NULL;
                   2903:     }
                   2904: 
                   2905:   if (vty_ipv6_accesslist_name)
                   2906:     {
                   2907:       XFREE(MTYPE_VTY, vty_ipv6_accesslist_name);
                   2908:       vty_ipv6_accesslist_name = NULL;
                   2909:     }
                   2910: }
                   2911: 
                   2912: static void
                   2913: vty_save_cwd (void)
                   2914: {
                   2915:   char cwd[MAXPATHLEN];
                   2916:   char *c;
                   2917: 
                   2918:   c = getcwd (cwd, MAXPATHLEN);
                   2919: 
                   2920:   if (!c)
                   2921:     {
                   2922:       chdir (SYSCONFDIR);
                   2923:       getcwd (cwd, MAXPATHLEN);
                   2924:     }
                   2925: 
                   2926:   vty_cwd = XMALLOC (MTYPE_TMP, strlen (cwd) + 1);
                   2927:   strcpy (vty_cwd, cwd);
                   2928: }
                   2929: 
                   2930: char *
                   2931: vty_get_cwd ()
                   2932: {
                   2933:   return vty_cwd;
                   2934: }
                   2935: 
                   2936: int
                   2937: vty_shell (struct vty *vty)
                   2938: {
                   2939:   return vty->type == VTY_SHELL ? 1 : 0;
                   2940: }
                   2941: 
                   2942: int
                   2943: vty_shell_serv (struct vty *vty)
                   2944: {
                   2945:   return vty->type == VTY_SHELL_SERV ? 1 : 0;
                   2946: }
                   2947: 
                   2948: void
                   2949: vty_init_vtysh ()
                   2950: {
                   2951:   vtyvec = vector_init (VECTOR_MIN_SIZE);
                   2952: }
                   2953: 
                   2954: /* Install vty's own commands like `who' command. */
                   2955: void
                   2956: vty_init (struct thread_master *master_thread)
                   2957: {
                   2958:   /* For further configuration read, preserve current directory. */
                   2959:   vty_save_cwd ();
                   2960: 
                   2961:   vtyvec = vector_init (VECTOR_MIN_SIZE);
                   2962: 
                   2963:   master = master_thread;
                   2964: 
                   2965:   /* Initilize server thread vector. */
                   2966:   Vvty_serv_thread = vector_init (VECTOR_MIN_SIZE);
                   2967: 
                   2968:   /* Install bgp top node. */
                   2969:   install_node (&vty_node, vty_config_write);
                   2970: 
                   2971:   install_element (RESTRICTED_NODE, &config_who_cmd);
                   2972:   install_element (RESTRICTED_NODE, &show_history_cmd);
                   2973:   install_element (VIEW_NODE, &config_who_cmd);
                   2974:   install_element (VIEW_NODE, &show_history_cmd);
                   2975:   install_element (ENABLE_NODE, &config_who_cmd);
                   2976:   install_element (CONFIG_NODE, &line_vty_cmd);
                   2977:   install_element (CONFIG_NODE, &service_advanced_vty_cmd);
                   2978:   install_element (CONFIG_NODE, &no_service_advanced_vty_cmd);
                   2979:   install_element (CONFIG_NODE, &show_history_cmd);
                   2980:   install_element (ENABLE_NODE, &terminal_monitor_cmd);
                   2981:   install_element (ENABLE_NODE, &terminal_no_monitor_cmd);
                   2982:   install_element (ENABLE_NODE, &no_terminal_monitor_cmd);
                   2983:   install_element (ENABLE_NODE, &show_history_cmd);
                   2984: 
                   2985:   install_default (VTY_NODE);
                   2986:   install_element (VTY_NODE, &exec_timeout_min_cmd);
                   2987:   install_element (VTY_NODE, &exec_timeout_sec_cmd);
                   2988:   install_element (VTY_NODE, &no_exec_timeout_cmd);
                   2989:   install_element (VTY_NODE, &vty_access_class_cmd);
                   2990:   install_element (VTY_NODE, &no_vty_access_class_cmd);
                   2991:   install_element (VTY_NODE, &vty_login_cmd);
                   2992:   install_element (VTY_NODE, &no_vty_login_cmd);
                   2993:   install_element (VTY_NODE, &vty_restricted_mode_cmd);
                   2994:   install_element (VTY_NODE, &vty_no_restricted_mode_cmd);
                   2995: #ifdef HAVE_IPV6
                   2996:   install_element (VTY_NODE, &vty_ipv6_access_class_cmd);
                   2997:   install_element (VTY_NODE, &no_vty_ipv6_access_class_cmd);
                   2998: #endif /* HAVE_IPV6 */
                   2999: }
                   3000: 
                   3001: void
                   3002: vty_terminate (void)
                   3003: {
                   3004:   if (vty_cwd)
                   3005:     XFREE (MTYPE_TMP, vty_cwd);
                   3006: 
                   3007:   if (vtyvec && Vvty_serv_thread)
                   3008:     {
                   3009:       vty_reset ();
                   3010:       vector_free (vtyvec);
                   3011:       vector_free (Vvty_serv_thread);
                   3012:     }
                   3013: }

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