diff --git a/src/vty/command.c b/src/vty/command.c
new file mode 100644
index 0000000..aac0c9b
--- /dev/null
+++ b/src/vty/command.c
@@ -0,0 +1,3390 @@
+/*
+   $Id: command.c,v 1.47 2005/04/25 16:26:42 paul Exp $
+
+   Command interpreter routine for virtual terminal [aka TeletYpe]
+   Copyright (C) 1997, 98, 99 Kunihiro Ishiguro
+
+This file is part of GNU Zebra.
+
+GNU Zebra is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published
+by the Free Software Foundation; either version 2, or (at your
+option) any later version.
+
+GNU Zebra is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Zebra; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+#include "cardshell.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <syslog.h>
+#include <errno.h>
+#define _XOPEN_SOURCE
+#include <unistd.h>
+#include <assert.h>
+#include <ctype.h>
+#include <time.h>
+#include <sys/time.h>
+
+//#include "memory.h"
+//#include "log.h"
+//#include <lib/version.h>
+//#include "thread.h"
+#include <vty/vector.h>
+#include <vty/vty.h>
+#include <vty/command.h>
+//#include "workqueue.h"
+
+/* Command vector which includes some level of command lists. Normally
+   each daemon maintains each own cmdvec. */
+vector cmdvec;
+
+/* Host information structure. */
+struct host host;
+
+/* Standard command node structures. */
+struct cmd_node auth_node = {
+	AUTH_NODE,
+	"Password: ",
+};
+
+struct cmd_node view_node = {
+	VIEW_NODE,
+	"%s> ",
+};
+
+struct cmd_node auth_enable_node = {
+	AUTH_ENABLE_NODE,
+	"Password: ",
+};
+
+struct cmd_node enable_node = {
+	ENABLE_NODE,
+	"%s# ",
+};
+
+struct cmd_node config_node = {
+	CONFIG_NODE,
+	"%s(config)# ",
+	1
+};
+
+/* Default motd string. */
+const char *default_motd = "\r\n\
+Hello, this is " QUAGGA_PROGNAME " (version " QUAGGA_VERSION ").\r\n\
+" QUAGGA_COPYRIGHT "\r\n\
+\r\n";
+
+#if 0
+static struct facility_map {
+	int facility;
+	const char *name;
+	size_t match;
+} syslog_facilities[] = {
+	{
+	LOG_KERN, "kern", 1}, {
+	LOG_USER, "user", 2}, {
+	LOG_MAIL, "mail", 1}, {
+	LOG_DAEMON, "daemon", 1}, {
+	LOG_AUTH, "auth", 1}, {
+	LOG_SYSLOG, "syslog", 1}, {
+	LOG_LPR, "lpr", 2}, {
+	LOG_NEWS, "news", 1}, {
+	LOG_UUCP, "uucp", 2}, {
+	LOG_CRON, "cron", 1},
+#ifdef LOG_FTP
+	{
+	LOG_FTP, "ftp", 1},
+#endif
+	{
+	LOG_LOCAL0, "local0", 6}, {
+	LOG_LOCAL1, "local1", 6}, {
+	LOG_LOCAL2, "local2", 6}, {
+	LOG_LOCAL3, "local3", 6}, {
+	LOG_LOCAL4, "local4", 6}, {
+	LOG_LOCAL5, "local5", 6}, {
+	LOG_LOCAL6, "local6", 6}, {
+	LOG_LOCAL7, "local7", 6}, {
+0, NULL, 0},};
+
+static const char *facility_name(int facility)
+{
+	struct facility_map *fm;
+
+	for (fm = syslog_facilities; fm->name; fm++)
+		if (fm->facility == facility)
+			return fm->name;
+	return "";
+}
+
+static int facility_match(const char *str)
+{
+	struct facility_map *fm;
+
+	for (fm = syslog_facilities; fm->name; fm++)
+		if (!strncmp(str, fm->name, fm->match))
+			return fm->facility;
+	return -1;
+}
+
+static int level_match(const char *s)
+{
+	int level;
+
+	for (level = 0; zlog_priority[level] != NULL; level++)
+		if (!strncmp(s, zlog_priority[level], 2))
+			return level;
+	return ZLOG_DISABLED;
+}
+#endif
+
+/* This is called from main when a daemon is invoked with -v or --version. */
+void print_version(const char *progname)
+{
+	printf("%s version %s\n", progname, QUAGGA_VERSION);
+	printf("%s\n", QUAGGA_COPYRIGHT);
+}
+
+/* Utility function to concatenate argv argument into a single string
+   with inserting ' ' character between each argument.  */
+char *argv_concat(const char **argv, int argc, int shift)
+{
+	int i;
+	size_t len;
+	char *str;
+	char *p;
+
+	len = 0;
+	for (i = shift; i < argc; i++)
+		len += strlen(argv[i]) + 1;
+	if (!len)
+		return NULL;
+	p = str = malloc(len);
+	for (i = shift; i < argc; i++) {
+		size_t arglen;
+		memcpy(p, argv[i], (arglen = strlen(argv[i])));
+		p += arglen;
+		*p++ = ' ';
+	}
+	*(p - 1) = '\0';
+	return str;
+}
+
+/* Install top node of command vector. */
+void install_node(struct cmd_node *node, int (*func) (struct vty *))
+{
+	vector_set_index(cmdvec, node->node, node);
+	node->func = func;
+	node->cmd_vector = vector_init(VECTOR_MIN_SIZE);
+}
+
+/* Compare two command's string.  Used in sort_node (). */
+static int cmp_node(const void *p, const void *q)
+{
+	struct cmd_element *a = *(struct cmd_element **)p;
+	struct cmd_element *b = *(struct cmd_element **)q;
+
+	return strcmp(a->string, b->string);
+}
+
+static int cmp_desc(const void *p, const void *q)
+{
+	struct desc *a = *(struct desc **)p;
+	struct desc *b = *(struct desc **)q;
+
+	return strcmp(a->cmd, b->cmd);
+}
+
+/* Sort each node's command element according to command string. */
+void sort_node()
+{
+	unsigned int i, j;
+	struct cmd_node *cnode;
+	vector descvec;
+	struct cmd_element *cmd_element;
+
+	for (i = 0; i < vector_active(cmdvec); i++)
+		if ((cnode = vector_slot(cmdvec, i)) != NULL) {
+			vector cmd_vector = cnode->cmd_vector;
+			qsort(cmd_vector->index, vector_active(cmd_vector),
+			      sizeof(void *), cmp_node);
+
+			for (j = 0; j < vector_active(cmd_vector); j++)
+				if ((cmd_element =
+				     vector_slot(cmd_vector, j)) != NULL
+				    && vector_active(cmd_element->strvec)) {
+					descvec =
+					    vector_slot(cmd_element->strvec,
+							vector_active
+							(cmd_element->strvec) -
+							1);
+					qsort(descvec->index,
+					      vector_active(descvec),
+					      sizeof(void *), cmp_desc);
+				}
+		}
+}
+
+/* Breaking up string into each command piece. I assume given
+   character is separated by a space character. Return value is a
+   vector which includes char ** data element. */
+vector cmd_make_strvec(const char *string)
+{
+	const char *cp, *start;
+	char *token;
+	int strlen;
+	vector strvec;
+
+	if (string == NULL)
+		return NULL;
+
+	cp = string;
+
+	/* Skip white spaces. */
+	while (isspace((int)*cp) && *cp != '\0')
+		cp++;
+
+	/* Return if there is only white spaces */
+	if (*cp == '\0')
+		return NULL;
+
+	if (*cp == '!' || *cp == '#')
+		return NULL;
+
+	/* Prepare return vector. */
+	strvec = vector_init(VECTOR_MIN_SIZE);
+
+	/* Copy each command piece and set into vector. */
+	while (1) {
+		start = cp;
+		while (!(isspace((int)*cp) || *cp == '\r' || *cp == '\n') &&
+		       *cp != '\0')
+			cp++;
+		strlen = cp - start;
+		token = malloc(strlen + 1);
+		memcpy(token, start, strlen);
+		*(token + strlen) = '\0';
+		vector_set(strvec, token);
+
+		while ((isspace((int)*cp) || *cp == '\n' || *cp == '\r') &&
+		       *cp != '\0')
+			cp++;
+
+		if (*cp == '\0')
+			return strvec;
+	}
+}
+
+/* Free allocated string vector. */
+void cmd_free_strvec(vector v)
+{
+	unsigned int i;
+	char *cp;
+
+	if (!v)
+		return;
+
+	for (i = 0; i < vector_active(v); i++)
+		if ((cp = vector_slot(v, i)) != NULL)
+			free(cp);
+
+	vector_free(v);
+}
+
+/* Fetch next description.  Used in cmd_make_descvec(). */
+static char *cmd_desc_str(const char **string)
+{
+	const char *cp, *start;
+	char *token;
+	int strlen;
+
+	cp = *string;
+
+	if (cp == NULL)
+		return NULL;
+
+	/* Skip white spaces. */
+	while (isspace((int)*cp) && *cp != '\0')
+		cp++;
+
+	/* Return if there is only white spaces */
+	if (*cp == '\0')
+		return NULL;
+
+	start = cp;
+
+	while (!(*cp == '\r' || *cp == '\n') && *cp != '\0')
+		cp++;
+
+	strlen = cp - start;
+	token = malloc(strlen + 1);
+	memcpy(token, start, strlen);
+	*(token + strlen) = '\0';
+
+	*string = cp;
+
+	return token;
+}
+
+/* New string vector. */
+static vector cmd_make_descvec(const char *string, const char *descstr)
+{
+	int multiple = 0;
+	const char *sp;
+	char *token;
+	int len;
+	const char *cp;
+	const char *dp;
+	vector allvec;
+	vector strvec = NULL;
+	struct desc *desc;
+
+	cp = string;
+	dp = descstr;
+
+	if (cp == NULL)
+		return NULL;
+
+	allvec = vector_init(VECTOR_MIN_SIZE);
+
+	while (1) {
+		while (isspace((int)*cp) && *cp != '\0')
+			cp++;
+
+		if (*cp == '(') {
+			multiple = 1;
+			cp++;
+		}
+		if (*cp == ')') {
+			multiple = 0;
+			cp++;
+		}
+		if (*cp == '|') {
+			if (!multiple) {
+				fprintf(stderr, "Command parse error!: %s\n",
+					string);
+				exit(1);
+			}
+			cp++;
+		}
+
+		while (isspace((int)*cp) && *cp != '\0')
+			cp++;
+
+		if (*cp == '(') {
+			multiple = 1;
+			cp++;
+		}
+
+		if (*cp == '\0')
+			return allvec;
+
+		sp = cp;
+
+		while (!
+		       (isspace((int)*cp) || *cp == '\r' || *cp == '\n'
+			|| *cp == ')' || *cp == '|') && *cp != '\0')
+			cp++;
+
+		len = cp - sp;
+
+		token = malloc(len + 1);
+		memcpy(token, sp, len);
+		*(token + len) = '\0';
+
+		desc = calloc(1, sizeof(struct desc));
+		desc->cmd = token;
+		desc->str = cmd_desc_str(&dp);
+
+		if (multiple) {
+			if (multiple == 1) {
+				strvec = vector_init(VECTOR_MIN_SIZE);
+				vector_set(allvec, strvec);
+			}
+			multiple++;
+		} else {
+			strvec = vector_init(VECTOR_MIN_SIZE);
+			vector_set(allvec, strvec);
+		}
+		vector_set(strvec, desc);
+	}
+}
+
+/* Count mandantory string vector size.  This is to determine inputed
+   command has enough command length. */
+static int cmd_cmdsize(vector strvec)
+{
+	unsigned int i;
+	int size = 0;
+	vector descvec;
+	struct desc *desc;
+
+	for (i = 0; i < vector_active(strvec); i++)
+		if ((descvec = vector_slot(strvec, i)) != NULL) {
+			if ((vector_active(descvec)) == 1
+			    && (desc = vector_slot(descvec, 0)) != NULL) {
+				if (desc->cmd == NULL || CMD_OPTION(desc->cmd))
+					return size;
+				else
+					size++;
+			} else
+				size++;
+		}
+	return size;
+}
+
+/* Return prompt character of specified node. */
+const char *cmd_prompt(enum node_type node)
+{
+	struct cmd_node *cnode;
+
+	cnode = vector_slot(cmdvec, node);
+	return cnode->prompt;
+}
+
+/* Install a command into a node. */
+void install_element(enum node_type ntype, struct cmd_element *cmd)
+{
+	struct cmd_node *cnode;
+
+	cnode = vector_slot(cmdvec, ntype);
+
+	if (cnode == NULL) {
+		fprintf(stderr,
+			"Command node %d doesn't exist, please check it\n",
+			ntype);
+		exit(1);
+	}
+
+	vector_set(cnode->cmd_vector, cmd);
+
+	cmd->strvec = cmd_make_descvec(cmd->string, cmd->doc);
+	cmd->cmdsize = cmd_cmdsize(cmd->strvec);
+}
+
+static unsigned char itoa64[] =
+    "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
+
+static void to64(char *s, long v, int n)
+{
+	while (--n >= 0) {
+		*s++ = itoa64[v & 0x3f];
+		v >>= 6;
+	}
+}
+
+static char *zencrypt(const char *passwd)
+{
+	char salt[6];
+	struct timeval tv;
+	char *crypt(const char *, const char *);
+
+	gettimeofday(&tv, 0);
+
+	to64(&salt[0], random(), 3);
+	to64(&salt[3], tv.tv_usec, 3);
+	salt[5] = '\0';
+
+	return crypt(passwd, salt);
+}
+
+/* This function write configuration of this host. */
+static int config_write_host(struct vty *vty)
+{
+#if 0
+	if (host.name)
+		vty_out(vty, "hostname %s%s", host.name, VTY_NEWLINE);
+
+	if (host.encrypt) {
+		if (host.password_encrypt)
+			vty_out(vty, "password 8 %s%s", host.password_encrypt,
+				VTY_NEWLINE);
+		if (host.enable_encrypt)
+			vty_out(vty, "enable password 8 %s%s",
+				host.enable_encrypt, VTY_NEWLINE);
+	} else {
+		if (host.password)
+			vty_out(vty, "password %s%s", host.password,
+				VTY_NEWLINE);
+		if (host.enable)
+			vty_out(vty, "enable password %s%s", host.enable,
+				VTY_NEWLINE);
+	}
+
+	if (zlog_default->default_lvl != LOG_DEBUG) {
+		vty_out(vty, "! N.B. The 'log trap' command is deprecated.%s",
+			VTY_NEWLINE);
+		vty_out(vty, "log trap %s%s",
+			zlog_priority[zlog_default->default_lvl], VTY_NEWLINE);
+	}
+
+	if (host.logfile
+	    && (zlog_default->maxlvl[ZLOG_DEST_FILE] != ZLOG_DISABLED)) {
+		vty_out(vty, "log file %s", host.logfile);
+		if (zlog_default->maxlvl[ZLOG_DEST_FILE] !=
+		    zlog_default->default_lvl)
+			vty_out(vty, " %s",
+				zlog_priority[zlog_default->
+					      maxlvl[ZLOG_DEST_FILE]]);
+		vty_out(vty, "%s", VTY_NEWLINE);
+	}
+
+	if (zlog_default->maxlvl[ZLOG_DEST_STDOUT] != ZLOG_DISABLED) {
+		vty_out(vty, "log stdout");
+		if (zlog_default->maxlvl[ZLOG_DEST_STDOUT] !=
+		    zlog_default->default_lvl)
+			vty_out(vty, " %s",
+				zlog_priority[zlog_default->
+					      maxlvl[ZLOG_DEST_STDOUT]]);
+		vty_out(vty, "%s", VTY_NEWLINE);
+	}
+
+	if (zlog_default->maxlvl[ZLOG_DEST_MONITOR] == ZLOG_DISABLED)
+		vty_out(vty, "no log monitor%s", VTY_NEWLINE);
+	else if (zlog_default->maxlvl[ZLOG_DEST_MONITOR] !=
+		 zlog_default->default_lvl)
+		vty_out(vty, "log monitor %s%s",
+			zlog_priority[zlog_default->maxlvl[ZLOG_DEST_MONITOR]],
+			VTY_NEWLINE);
+
+	if (zlog_default->maxlvl[ZLOG_DEST_SYSLOG] != ZLOG_DISABLED) {
+		vty_out(vty, "log syslog");
+		if (zlog_default->maxlvl[ZLOG_DEST_SYSLOG] !=
+		    zlog_default->default_lvl)
+			vty_out(vty, " %s",
+				zlog_priority[zlog_default->
+					      maxlvl[ZLOG_DEST_SYSLOG]]);
+		vty_out(vty, "%s", VTY_NEWLINE);
+	}
+
+	if (zlog_default->facility != LOG_DAEMON)
+		vty_out(vty, "log facility %s%s",
+			facility_name(zlog_default->facility), VTY_NEWLINE);
+
+	if (zlog_default->record_priority == 1)
+		vty_out(vty, "log record-priority%s", VTY_NEWLINE);
+
+	if (host.advanced)
+		vty_out(vty, "service advanced-vty%s", VTY_NEWLINE);
+
+	if (host.encrypt)
+		vty_out(vty, "service password-encryption%s", VTY_NEWLINE);
+
+	if (host.lines >= 0)
+		vty_out(vty, "service terminal-length %d%s", host.lines,
+			VTY_NEWLINE);
+
+	if (host.motdfile)
+		vty_out(vty, "banner motd file %s%s", host.motdfile,
+			VTY_NEWLINE);
+	else if (!host.motd)
+		vty_out(vty, "no banner motd%s", VTY_NEWLINE);
+
+#endif
+	return 1;
+}
+
+/* Utility function for getting command vector. */
+static vector cmd_node_vector(vector v, enum node_type ntype)
+{
+	struct cmd_node *cnode = vector_slot(v, ntype);
+	return cnode->cmd_vector;
+}
+
+#if 0
+/* Filter command vector by symbol.  This function is not actually used;
+ * should it be deleted? */
+static int cmd_filter_by_symbol(char *command, char *symbol)
+{
+	int i, lim;
+
+	if (strcmp(symbol, "IPV4_ADDRESS") == 0) {
+		i = 0;
+		lim = strlen(command);
+		while (i < lim) {
+			if (!
+			    (isdigit((int)command[i]) || command[i] == '.'
+			     || command[i] == '/'))
+				return 1;
+			i++;
+		}
+		return 0;
+	}
+	if (strcmp(symbol, "STRING") == 0) {
+		i = 0;
+		lim = strlen(command);
+		while (i < lim) {
+			if (!
+			    (isalpha((int)command[i]) || command[i] == '_'
+			     || command[i] == '-'))
+				return 1;
+			i++;
+		}
+		return 0;
+	}
+	if (strcmp(symbol, "IFNAME") == 0) {
+		i = 0;
+		lim = strlen(command);
+		while (i < lim) {
+			if (!isalnum((int)command[i]))
+				return 1;
+			i++;
+		}
+		return 0;
+	}
+	return 0;
+}
+#endif
+
+/* Completion match types. */
+enum match_type {
+	no_match,
+	extend_match,
+	ipv4_prefix_match,
+	ipv4_match,
+	ipv6_prefix_match,
+	ipv6_match,
+	range_match,
+	vararg_match,
+	partly_match,
+	exact_match
+};
+
+static enum match_type cmd_ipv4_match(const char *str)
+{
+	const char *sp;
+	int dots = 0, nums = 0;
+	char buf[4];
+
+	if (str == NULL)
+		return partly_match;
+
+	for (;;) {
+		memset(buf, 0, sizeof(buf));
+		sp = str;
+		while (*str != '\0') {
+			if (*str == '.') {
+				if (dots >= 3)
+					return no_match;
+
+				if (*(str + 1) == '.')
+					return no_match;
+
+				if (*(str + 1) == '\0')
+					return partly_match;
+
+				dots++;
+				break;
+			}
+			if (!isdigit((int)*str))
+				return no_match;
+
+			str++;
+		}
+
+		if (str - sp > 3)
+			return no_match;
+
+		strncpy(buf, sp, str - sp);
+		if (atoi(buf) > 255)
+			return no_match;
+
+		nums++;
+
+		if (*str == '\0')
+			break;
+
+		str++;
+	}
+
+	if (nums < 4)
+		return partly_match;
+
+	return exact_match;
+}
+
+static enum match_type cmd_ipv4_prefix_match(const char *str)
+{
+	const char *sp;
+	int dots = 0;
+	char buf[4];
+
+	if (str == NULL)
+		return partly_match;
+
+	for (;;) {
+		memset(buf, 0, sizeof(buf));
+		sp = str;
+		while (*str != '\0' && *str != '/') {
+			if (*str == '.') {
+				if (dots == 3)
+					return no_match;
+
+				if (*(str + 1) == '.' || *(str + 1) == '/')
+					return no_match;
+
+				if (*(str + 1) == '\0')
+					return partly_match;
+
+				dots++;
+				break;
+			}
+
+			if (!isdigit((int)*str))
+				return no_match;
+
+			str++;
+		}
+
+		if (str - sp > 3)
+			return no_match;
+
+		strncpy(buf, sp, str - sp);
+		if (atoi(buf) > 255)
+			return no_match;
+
+		if (dots == 3) {
+			if (*str == '/') {
+				if (*(str + 1) == '\0')
+					return partly_match;
+
+				str++;
+				break;
+			} else if (*str == '\0')
+				return partly_match;
+		}
+
+		if (*str == '\0')
+			return partly_match;
+
+		str++;
+	}
+
+	sp = str;
+	while (*str != '\0') {
+		if (!isdigit((int)*str))
+			return no_match;
+
+		str++;
+	}
+
+	if (atoi(sp) > 32)
+		return no_match;
+
+	return exact_match;
+}
+
+#define IPV6_ADDR_STR		"0123456789abcdefABCDEF:.%"
+#define IPV6_PREFIX_STR		"0123456789abcdefABCDEF:.%/"
+#define STATE_START		1
+#define STATE_COLON		2
+#define STATE_DOUBLE		3
+#define STATE_ADDR		4
+#define STATE_DOT               5
+#define STATE_SLASH		6
+#define STATE_MASK		7
+
+#ifdef HAVE_IPV6
+
+static enum match_type cmd_ipv6_match(const char *str)
+{
+	int state = STATE_START;
+	int colons = 0, nums = 0, double_colon = 0;
+	const char *sp = NULL;
+	struct sockaddr_in6 sin6_dummy;
+	int ret;
+
+	if (str == NULL)
+		return partly_match;
+
+	if (strspn(str, IPV6_ADDR_STR) != strlen(str))
+		return no_match;
+
+	/* use inet_pton that has a better support,
+	 * for example inet_pton can support the automatic addresses:
+	 *  ::1.2.3.4
+	 */
+	ret = inet_pton(AF_INET6, str, &sin6_dummy.sin6_addr);
+
+	if (ret == 1)
+		return exact_match;
+
+	while (*str != '\0') {
+		switch (state) {
+		case STATE_START:
+			if (*str == ':') {
+				if (*(str + 1) != ':' && *(str + 1) != '\0')
+					return no_match;
+				colons--;
+				state = STATE_COLON;
+			} else {
+				sp = str;
+				state = STATE_ADDR;
+			}
+
+			continue;
+		case STATE_COLON:
+			colons++;
+			if (*(str + 1) == ':')
+				state = STATE_DOUBLE;
+			else {
+				sp = str + 1;
+				state = STATE_ADDR;
+			}
+			break;
+		case STATE_DOUBLE:
+			if (double_colon)
+				return no_match;
+
+			if (*(str + 1) == ':')
+				return no_match;
+			else {
+				if (*(str + 1) != '\0')
+					colons++;
+				sp = str + 1;
+				state = STATE_ADDR;
+			}
+
+			double_colon++;
+			nums++;
+			break;
+		case STATE_ADDR:
+			if (*(str + 1) == ':' || *(str + 1) == '\0') {
+				if (str - sp > 3)
+					return no_match;
+
+				nums++;
+				state = STATE_COLON;
+			}
+			if (*(str + 1) == '.')
+				state = STATE_DOT;
+			break;
+		case STATE_DOT:
+			state = STATE_ADDR;
+			break;
+		default:
+			break;
+		}
+
+		if (nums > 8)
+			return no_match;
+
+		if (colons > 7)
+			return no_match;
+
+		str++;
+	}
+
+#if 0
+	if (nums < 11)
+		return partly_match;
+#endif				/* 0 */
+
+	return exact_match;
+}
+
+static enum match_type cmd_ipv6_prefix_match(const char *str)
+{
+	int state = STATE_START;
+	int colons = 0, nums = 0, double_colon = 0;
+	int mask;
+	const char *sp = NULL;
+	char *endptr = NULL;
+
+	if (str == NULL)
+		return partly_match;
+
+	if (strspn(str, IPV6_PREFIX_STR) != strlen(str))
+		return no_match;
+
+	while (*str != '\0' && state != STATE_MASK) {
+		switch (state) {
+		case STATE_START:
+			if (*str == ':') {
+				if (*(str + 1) != ':' && *(str + 1) != '\0')
+					return no_match;
+				colons--;
+				state = STATE_COLON;
+			} else {
+				sp = str;
+				state = STATE_ADDR;
+			}
+
+			continue;
+		case STATE_COLON:
+			colons++;
+			if (*(str + 1) == '/')
+				return no_match;
+			else if (*(str + 1) == ':')
+				state = STATE_DOUBLE;
+			else {
+				sp = str + 1;
+				state = STATE_ADDR;
+			}
+			break;
+		case STATE_DOUBLE:
+			if (double_colon)
+				return no_match;
+
+			if (*(str + 1) == ':')
+				return no_match;
+			else {
+				if (*(str + 1) != '\0' && *(str + 1) != '/')
+					colons++;
+				sp = str + 1;
+
+				if (*(str + 1) == '/')
+					state = STATE_SLASH;
+				else
+					state = STATE_ADDR;
+			}
+
+			double_colon++;
+			nums += 1;
+			break;
+		case STATE_ADDR:
+			if (*(str + 1) == ':' || *(str + 1) == '.'
+			    || *(str + 1) == '\0' || *(str + 1) == '/') {
+				if (str - sp > 3)
+					return no_match;
+
+				for (; sp <= str; sp++)
+					if (*sp == '/')
+						return no_match;
+
+				nums++;
+
+				if (*(str + 1) == ':')
+					state = STATE_COLON;
+				else if (*(str + 1) == '.')
+					state = STATE_DOT;
+				else if (*(str + 1) == '/')
+					state = STATE_SLASH;
+			}
+			break;
+		case STATE_DOT:
+			state = STATE_ADDR;
+			break;
+		case STATE_SLASH:
+			if (*(str + 1) == '\0')
+				return partly_match;
+
+			state = STATE_MASK;
+			break;
+		default:
+			break;
+		}
+
+		if (nums > 11)
+			return no_match;
+
+		if (colons > 7)
+			return no_match;
+
+		str++;
+	}
+
+	if (state < STATE_MASK)
+		return partly_match;
+
+	mask = strtol(str, &endptr, 10);
+	if (*endptr != '\0')
+		return no_match;
+
+	if (mask < 0 || mask > 128)
+		return no_match;
+
+/* I don't know why mask < 13 makes command match partly.
+   Forgive me to make this comments. I Want to set static default route
+   because of lack of function to originate default in ospf6d; sorry
+       yasu
+  if (mask < 13)
+    return partly_match;
+*/
+
+	return exact_match;
+}
+
+#endif				/* HAVE_IPV6  */
+
+#define DECIMAL_STRLEN_MAX 10
+
+static int cmd_range_match(const char *range, const char *str)
+{
+	char *p;
+	char buf[DECIMAL_STRLEN_MAX + 1];
+	char *endptr = NULL;
+	unsigned long min, max, val;
+
+	if (str == NULL)
+		return 1;
+
+	val = strtoul(str, &endptr, 10);
+	if (*endptr != '\0')
+		return 0;
+
+	range++;
+	p = strchr(range, '-');
+	if (p == NULL)
+		return 0;
+	if (p - range > DECIMAL_STRLEN_MAX)
+		return 0;
+	strncpy(buf, range, p - range);
+	buf[p - range] = '\0';
+	min = strtoul(buf, &endptr, 10);
+	if (*endptr != '\0')
+		return 0;
+
+	range = p + 1;
+	p = strchr(range, '>');
+	if (p == NULL)
+		return 0;
+	if (p - range > DECIMAL_STRLEN_MAX)
+		return 0;
+	strncpy(buf, range, p - range);
+	buf[p - range] = '\0';
+	max = strtoul(buf, &endptr, 10);
+	if (*endptr != '\0')
+		return 0;
+
+	if (val < min || val > max)
+		return 0;
+
+	return 1;
+}
+
+/* Make completion match and return match type flag. */
+static enum match_type
+cmd_filter_by_completion(char *command, vector v, unsigned int index)
+{
+	unsigned int i;
+	const char *str;
+	struct cmd_element *cmd_element;
+	enum match_type match_type;
+	vector descvec;
+	struct desc *desc;
+
+	match_type = no_match;
+
+	/* If command and cmd_element string does not match set NULL to vector */
+	for (i = 0; i < vector_active(v); i++)
+		if ((cmd_element = vector_slot(v, i)) != NULL) {
+			if (index >= vector_active(cmd_element->strvec))
+				vector_slot(v, i) = NULL;
+			else {
+				unsigned int j;
+				int matched = 0;
+
+				descvec =
+				    vector_slot(cmd_element->strvec, index);
+
+				for (j = 0; j < vector_active(descvec); j++)
+					if ((desc = vector_slot(descvec, j))) {
+						str = desc->cmd;
+
+						if (CMD_VARARG(str)) {
+							if (match_type <
+							    vararg_match)
+								match_type =
+								    vararg_match;
+							matched++;
+						} else if (CMD_RANGE(str)) {
+							if (cmd_range_match
+							    (str, command)) {
+								if (match_type <
+								    range_match)
+									match_type
+									    =
+									    range_match;
+
+								matched++;
+							}
+						}
+#ifdef HAVE_IPV6
+						else if (CMD_IPV6(str)) {
+							if (cmd_ipv6_match
+							    (command)) {
+								if (match_type <
+								    ipv6_match)
+									match_type
+									    =
+									    ipv6_match;
+
+								matched++;
+							}
+						} else if (CMD_IPV6_PREFIX(str)) {
+							if (cmd_ipv6_prefix_match(command)) {
+								if (match_type <
+								    ipv6_prefix_match)
+									match_type
+									    =
+									    ipv6_prefix_match;
+
+								matched++;
+							}
+						}
+#endif				/* HAVE_IPV6  */
+						else if (CMD_IPV4(str)) {
+							if (cmd_ipv4_match
+							    (command)) {
+								if (match_type <
+								    ipv4_match)
+									match_type
+									    =
+									    ipv4_match;
+
+								matched++;
+							}
+						} else if (CMD_IPV4_PREFIX(str)) {
+							if (cmd_ipv4_prefix_match(command)) {
+								if (match_type <
+								    ipv4_prefix_match)
+									match_type
+									    =
+									    ipv4_prefix_match;
+								matched++;
+							}
+						} else
+							/* Check is this point's argument optional ? */
+						if (CMD_OPTION(str)
+							    ||
+							    CMD_VARIABLE(str)) {
+							if (match_type <
+							    extend_match)
+								match_type =
+								    extend_match;
+							matched++;
+						} else
+						    if (strncmp
+							(command, str,
+							 strlen(command)) ==
+							0) {
+							if (strcmp(command, str)
+							    == 0)
+								match_type =
+								    exact_match;
+							else {
+								if (match_type <
+								    partly_match)
+									match_type
+									    =
+									    partly_match;
+							}
+							matched++;
+						}
+					}
+				if (!matched)
+					vector_slot(v, i) = NULL;
+			}
+		}
+	return match_type;
+}
+
+/* Filter vector by command character with index. */
+static enum match_type
+cmd_filter_by_string(char *command, vector v, unsigned int index)
+{
+	unsigned int i;
+	const char *str;
+	struct cmd_element *cmd_element;
+	enum match_type match_type;
+	vector descvec;
+	struct desc *desc;
+
+	match_type = no_match;
+
+	/* If command and cmd_element string does not match set NULL to vector */
+	for (i = 0; i < vector_active(v); i++)
+		if ((cmd_element = vector_slot(v, i)) != NULL) {
+			/* If given index is bigger than max string vector of command,
+			   set NULL */
+			if (index >= vector_active(cmd_element->strvec))
+				vector_slot(v, i) = NULL;
+			else {
+				unsigned int j;
+				int matched = 0;
+
+				descvec =
+				    vector_slot(cmd_element->strvec, index);
+
+				for (j = 0; j < vector_active(descvec); j++)
+					if ((desc = vector_slot(descvec, j))) {
+						str = desc->cmd;
+
+						if (CMD_VARARG(str)) {
+							if (match_type <
+							    vararg_match)
+								match_type =
+								    vararg_match;
+							matched++;
+						} else if (CMD_RANGE(str)) {
+							if (cmd_range_match
+							    (str, command)) {
+								if (match_type <
+								    range_match)
+									match_type
+									    =
+									    range_match;
+								matched++;
+							}
+						}
+#ifdef HAVE_IPV6
+						else if (CMD_IPV6(str)) {
+							if (cmd_ipv6_match
+							    (command) ==
+							    exact_match) {
+								if (match_type <
+								    ipv6_match)
+									match_type
+									    =
+									    ipv6_match;
+								matched++;
+							}
+						} else if (CMD_IPV6_PREFIX(str)) {
+							if (cmd_ipv6_prefix_match(command) == exact_match) {
+								if (match_type <
+								    ipv6_prefix_match)
+									match_type
+									    =
+									    ipv6_prefix_match;
+								matched++;
+							}
+						}
+#endif				/* HAVE_IPV6  */
+						else if (CMD_IPV4(str)) {
+							if (cmd_ipv4_match
+							    (command) ==
+							    exact_match) {
+								if (match_type <
+								    ipv4_match)
+									match_type
+									    =
+									    ipv4_match;
+								matched++;
+							}
+						} else if (CMD_IPV4_PREFIX(str)) {
+							if (cmd_ipv4_prefix_match(command) == exact_match) {
+								if (match_type <
+								    ipv4_prefix_match)
+									match_type
+									    =
+									    ipv4_prefix_match;
+								matched++;
+							}
+						} else if (CMD_OPTION(str)
+							   || CMD_VARIABLE(str))
+						{
+							if (match_type <
+							    extend_match)
+								match_type =
+								    extend_match;
+							matched++;
+						} else {
+							if (strcmp(command, str)
+							    == 0) {
+								match_type =
+								    exact_match;
+								matched++;
+							}
+						}
+					}
+				if (!matched)
+					vector_slot(v, i) = NULL;
+			}
+		}
+	return match_type;
+}
+
+/* Check ambiguous match */
+static int
+is_cmd_ambiguous(char *command, vector v, int index, enum match_type type)
+{
+	unsigned int i;
+	unsigned int j;
+	const char *str = NULL;
+	struct cmd_element *cmd_element;
+	const char *matched = NULL;
+	vector descvec;
+	struct desc *desc;
+
+	for (i = 0; i < vector_active(v); i++)
+		if ((cmd_element = vector_slot(v, i)) != NULL) {
+			int match = 0;
+
+			descvec = vector_slot(cmd_element->strvec, index);
+
+			for (j = 0; j < vector_active(descvec); j++)
+				if ((desc = vector_slot(descvec, j))) {
+					enum match_type ret;
+
+					str = desc->cmd;
+
+					switch (type) {
+					case exact_match:
+						if (!
+						    (CMD_OPTION(str)
+						     || CMD_VARIABLE(str))
+&& strcmp(command, str) == 0)
+							match++;
+						break;
+					case partly_match:
+						if (!
+						    (CMD_OPTION(str)
+						     || CMD_VARIABLE(str))
+&& strncmp(command, str, strlen(command)) == 0) {
+							if (matched
+							    && strcmp(matched,
+								      str) != 0)
+								return 1;	/* There is ambiguous match. */
+							else
+								matched = str;
+							match++;
+						}
+						break;
+					case range_match:
+						if (cmd_range_match
+						    (str, command)) {
+							if (matched
+							    && strcmp(matched,
+								      str) != 0)
+								return 1;
+							else
+								matched = str;
+							match++;
+						}
+						break;
+#ifdef HAVE_IPV6
+					case ipv6_match:
+						if (CMD_IPV6(str))
+							match++;
+						break;
+					case ipv6_prefix_match:
+						if ((ret =
+						     cmd_ipv6_prefix_match
+						     (command)) != no_match) {
+							if (ret == partly_match)
+								return 2;	/* There is incomplete match. */
+
+							match++;
+						}
+						break;
+#endif				/* HAVE_IPV6 */
+					case ipv4_match:
+						if (CMD_IPV4(str))
+							match++;
+						break;
+					case ipv4_prefix_match:
+						if ((ret =
+						     cmd_ipv4_prefix_match
+						     (command)) != no_match) {
+							if (ret == partly_match)
+								return 2;	/* There is incomplete match. */
+
+							match++;
+						}
+						break;
+					case extend_match:
+						if (CMD_OPTION(str)
+						    || CMD_VARIABLE(str))
+							match++;
+						break;
+					case no_match:
+					default:
+						break;
+					}
+				}
+			if (!match)
+				vector_slot(v, i) = NULL;
+		}
+	return 0;
+}
+
+/* If src matches dst return dst string, otherwise return NULL */
+static const char *cmd_entry_function(const char *src, const char *dst)
+{
+	/* Skip variable arguments. */
+	if (CMD_OPTION(dst) || CMD_VARIABLE(dst) || CMD_VARARG(dst) ||
+	    CMD_IPV4(dst) || CMD_IPV4_PREFIX(dst) || CMD_RANGE(dst))
+		return NULL;
+
+	/* In case of 'command \t', given src is NULL string. */
+	if (src == NULL)
+		return dst;
+
+	/* Matched with input string. */
+	if (strncmp(src, dst, strlen(src)) == 0)
+		return dst;
+
+	return NULL;
+}
+
+/* If src matches dst return dst string, otherwise return NULL */
+/* This version will return the dst string always if it is
+   CMD_VARIABLE for '?' key processing */
+static const char *cmd_entry_function_desc(const char *src, const char *dst)
+{
+	if (CMD_VARARG(dst))
+		return dst;
+
+	if (CMD_RANGE(dst)) {
+		if (cmd_range_match(dst, src))
+			return dst;
+		else
+			return NULL;
+	}
+#ifdef HAVE_IPV6
+	if (CMD_IPV6(dst)) {
+		if (cmd_ipv6_match(src))
+			return dst;
+		else
+			return NULL;
+	}
+
+	if (CMD_IPV6_PREFIX(dst)) {
+		if (cmd_ipv6_prefix_match(src))
+			return dst;
+		else
+			return NULL;
+	}
+#endif				/* HAVE_IPV6 */
+
+	if (CMD_IPV4(dst)) {
+		if (cmd_ipv4_match(src))
+			return dst;
+		else
+			return NULL;
+	}
+
+	if (CMD_IPV4_PREFIX(dst)) {
+		if (cmd_ipv4_prefix_match(src))
+			return dst;
+		else
+			return NULL;
+	}
+
+	/* Optional or variable commands always match on '?' */
+	if (CMD_OPTION(dst) || CMD_VARIABLE(dst))
+		return dst;
+
+	/* In case of 'command \t', given src is NULL string. */
+	if (src == NULL)
+		return dst;
+
+	if (strncmp(src, dst, strlen(src)) == 0)
+		return dst;
+	else
+		return NULL;
+}
+
+/* Check same string element existence.  If it isn't there return
+    1. */
+static int cmd_unique_string(vector v, const char *str)
+{
+	unsigned int i;
+	char *match;
+
+	for (i = 0; i < vector_active(v); i++)
+		if ((match = vector_slot(v, i)) != NULL)
+			if (strcmp(match, str) == 0)
+				return 0;
+	return 1;
+}
+
+/* Compare string to description vector.  If there is same string
+   return 1 else return 0. */
+static int desc_unique_string(vector v, const char *str)
+{
+	unsigned int i;
+	struct desc *desc;
+
+	for (i = 0; i < vector_active(v); i++)
+		if ((desc = vector_slot(v, i)) != NULL)
+			if (strcmp(desc->cmd, str) == 0)
+				return 1;
+	return 0;
+}
+
+static int cmd_try_do_shortcut(enum node_type node, char *first_word)
+{
+	if (first_word != NULL &&
+	    node != AUTH_NODE &&
+	    node != VIEW_NODE &&
+	    node != AUTH_ENABLE_NODE &&
+	    node != ENABLE_NODE && 0 == strcmp("do", first_word))
+		return 1;
+	return 0;
+}
+
+/* '?' describe command support. */
+static vector
+cmd_describe_command_real(vector vline, struct vty *vty, int *status)
+{
+	unsigned int i;
+	vector cmd_vector;
+#define INIT_MATCHVEC_SIZE 10
+	vector matchvec;
+	struct cmd_element *cmd_element;
+	unsigned int index;
+	int ret;
+	enum match_type match;
+	char *command;
+	static struct desc desc_cr = { "<cr>", "" };
+
+	/* Set index. */
+	if (vector_active(vline) == 0) {
+		*status = CMD_ERR_NO_MATCH;
+		return NULL;
+	} else
+		index = vector_active(vline) - 1;
+
+	/* Make copy vector of current node's command vector. */
+	cmd_vector = vector_copy(cmd_node_vector(cmdvec, vty->node));
+
+	/* Prepare match vector */
+	matchvec = vector_init(INIT_MATCHVEC_SIZE);
+
+	/* Filter commands. */
+	/* Only words precedes current word will be checked in this loop. */
+	for (i = 0; i < index; i++)
+		if ((command = vector_slot(vline, i))) {
+			match =
+			    cmd_filter_by_completion(command, cmd_vector, i);
+
+			if (match == vararg_match) {
+				struct cmd_element *cmd_element;
+				vector descvec;
+				unsigned int j, k;
+
+				for (j = 0; j < vector_active(cmd_vector); j++)
+					if ((cmd_element =
+					     vector_slot(cmd_vector, j)) != NULL
+					    &&
+					    (vector_active
+					     (cmd_element->strvec))) {
+						descvec =
+						    vector_slot(cmd_element->
+								strvec,
+								vector_active
+								(cmd_element->
+								 strvec) - 1);
+						for (k = 0;
+						     k < vector_active(descvec);
+						     k++) {
+							struct desc *desc =
+							    vector_slot(descvec,
+									k);
+							vector_set(matchvec,
+								   desc);
+						}
+					}
+
+				vector_set(matchvec, &desc_cr);
+				vector_free(cmd_vector);
+
+				return matchvec;
+			}
+
+			if ((ret =
+			     is_cmd_ambiguous(command, cmd_vector, i,
+					      match)) == 1) {
+				vector_free(cmd_vector);
+				*status = CMD_ERR_AMBIGUOUS;
+				return NULL;
+			} else if (ret == 2) {
+				vector_free(cmd_vector);
+				*status = CMD_ERR_NO_MATCH;
+				return NULL;
+			}
+		}
+
+	/* Prepare match vector */
+	/*  matchvec = vector_init (INIT_MATCHVEC_SIZE); */
+
+	/* Make sure that cmd_vector is filtered based on current word */
+	command = vector_slot(vline, index);
+	if (command)
+		match = cmd_filter_by_completion(command, cmd_vector, index);
+
+	/* Make description vector. */
+	for (i = 0; i < vector_active(cmd_vector); i++)
+		if ((cmd_element = vector_slot(cmd_vector, i)) != NULL) {
+			const char *string = NULL;
+			vector strvec = cmd_element->strvec;
+
+			/* if command is NULL, index may be equal to vector_active */
+			if (command && index >= vector_active(strvec))
+				vector_slot(cmd_vector, i) = NULL;
+			else {
+				/* Check if command is completed. */
+				if (command == NULL
+				    && index == vector_active(strvec)) {
+					string = "<cr>";
+					if (!desc_unique_string
+					    (matchvec, string))
+						vector_set(matchvec, &desc_cr);
+				} else {
+					unsigned int j;
+					vector descvec =
+					    vector_slot(strvec, index);
+					struct desc *desc;
+
+					for (j = 0; j < vector_active(descvec);
+					     j++)
+						if ((desc =
+						     vector_slot(descvec, j))) {
+							string =
+							    cmd_entry_function_desc
+							    (command,
+							     desc->cmd);
+							if (string) {
+								/* Uniqueness check */
+								if (!desc_unique_string(matchvec, string))
+									vector_set
+									    (matchvec,
+									     desc);
+							}
+						}
+				}
+			}
+		}
+	vector_free(cmd_vector);
+
+	if (vector_slot(matchvec, 0) == NULL) {
+		vector_free(matchvec);
+		*status = CMD_ERR_NO_MATCH;
+	} else
+		*status = CMD_SUCCESS;
+
+	return matchvec;
+}
+
+vector cmd_describe_command(vector vline, struct vty * vty, int *status)
+{
+	vector ret;
+
+	if (cmd_try_do_shortcut(vty->node, vector_slot(vline, 0))) {
+		enum node_type onode;
+		vector shifted_vline;
+		unsigned int index;
+
+		onode = vty->node;
+		vty->node = ENABLE_NODE;
+		/* We can try it on enable node, cos' the vty is authenticated */
+
+		shifted_vline = vector_init(vector_count(vline));
+		/* use memcpy? */
+		for (index = 1; index < vector_active(vline); index++) {
+			vector_set_index(shifted_vline, index - 1,
+					 vector_lookup(vline, index));
+		}
+
+		ret = cmd_describe_command_real(shifted_vline, vty, status);
+
+		vector_free(shifted_vline);
+		vty->node = onode;
+		return ret;
+	}
+
+	return cmd_describe_command_real(vline, vty, status);
+}
+
+/* Check LCD of matched command. */
+static int cmd_lcd(char **matched)
+{
+	int i;
+	int j;
+	int lcd = -1;
+	char *s1, *s2;
+	char c1, c2;
+
+	if (matched[0] == NULL || matched[1] == NULL)
+		return 0;
+
+	for (i = 1; matched[i] != NULL; i++) {
+		s1 = matched[i - 1];
+		s2 = matched[i];
+
+		for (j = 0; (c1 = s1[j]) && (c2 = s2[j]); j++)
+			if (c1 != c2)
+				break;
+
+		if (lcd < 0)
+			lcd = j;
+		else {
+			if (lcd > j)
+				lcd = j;
+		}
+	}
+	return lcd;
+}
+
+/* Command line completion support. */
+static char **cmd_complete_command_real(vector vline, struct vty *vty,
+					int *status)
+{
+	unsigned int i;
+	vector cmd_vector = vector_copy(cmd_node_vector(cmdvec, vty->node));
+#define INIT_MATCHVEC_SIZE 10
+	vector matchvec;
+	struct cmd_element *cmd_element;
+	unsigned int index;
+	char **match_str;
+	struct desc *desc;
+	vector descvec;
+	char *command;
+	int lcd;
+
+	if (vector_active(vline) == 0) {
+		*status = CMD_ERR_NO_MATCH;
+		return NULL;
+	} else
+		index = vector_active(vline) - 1;
+
+	/* First, filter by preceeding command string */
+	for (i = 0; i < index; i++)
+		if ((command = vector_slot(vline, i))) {
+			enum match_type match;
+			int ret;
+
+			/* First try completion match, if there is exactly match return 1 */
+			match =
+			    cmd_filter_by_completion(command, cmd_vector, i);
+
+			/* If there is exact match then filter ambiguous match else check
+			   ambiguousness. */
+			if ((ret =
+			     is_cmd_ambiguous(command, cmd_vector, i,
+					      match)) == 1) {
+				vector_free(cmd_vector);
+				*status = CMD_ERR_AMBIGUOUS;
+				return NULL;
+			}
+			/*
+			   else if (ret == 2)
+			   {
+			   vector_free (cmd_vector);
+			   *status = CMD_ERR_NO_MATCH;
+			   return NULL;
+			   }
+			 */
+		}
+
+	/* Prepare match vector. */
+	matchvec = vector_init(INIT_MATCHVEC_SIZE);
+
+	/* Now we got into completion */
+	for (i = 0; i < vector_active(cmd_vector); i++)
+		if ((cmd_element = vector_slot(cmd_vector, i))) {
+			const char *string;
+			vector strvec = cmd_element->strvec;
+
+			/* Check field length */
+			if (index >= vector_active(strvec))
+				vector_slot(cmd_vector, i) = NULL;
+			else {
+				unsigned int j;
+
+				descvec = vector_slot(strvec, index);
+				for (j = 0; j < vector_active(descvec); j++)
+					if ((desc = vector_slot(descvec, j))) {
+						if ((string =
+						     cmd_entry_function
+						     (vector_slot(vline, index),
+						      desc->cmd)))
+							if (cmd_unique_string
+							    (matchvec, string))
+								vector_set
+								    (matchvec,
+								     strdup
+								     (string));
+					}
+			}
+		}
+
+	/* We don't need cmd_vector any more. */
+	vector_free(cmd_vector);
+
+	/* No matched command */
+	if (vector_slot(matchvec, 0) == NULL) {
+		vector_free(matchvec);
+
+		/* In case of 'command \t' pattern.  Do you need '?' command at
+		   the end of the line. */
+		if (vector_slot(vline, index) == '\0')
+			*status = CMD_ERR_NOTHING_TODO;
+		else
+			*status = CMD_ERR_NO_MATCH;
+		return NULL;
+	}
+
+	/* Only one matched */
+	if (vector_slot(matchvec, 1) == NULL) {
+		match_str = (char **)matchvec->index;
+		vector_only_wrapper_free(matchvec);
+		*status = CMD_COMPLETE_FULL_MATCH;
+		return match_str;
+	}
+	/* Make it sure last element is NULL. */
+	vector_set(matchvec, NULL);
+
+	/* Check LCD of matched strings. */
+	if (vector_slot(vline, index) != NULL) {
+		lcd = cmd_lcd((char **)matchvec->index);
+
+		if (lcd) {
+			int len = strlen(vector_slot(vline, index));
+
+			if (len < lcd) {
+				char *lcdstr;
+
+				lcdstr = malloc(lcd + 1);
+				memcpy(lcdstr, matchvec->index[0], lcd);
+				lcdstr[lcd] = '\0';
+
+				/* match_str = (char **) &lcdstr; */
+
+				/* Free matchvec. */
+				for (i = 0; i < vector_active(matchvec); i++) {
+					if (vector_slot(matchvec, i))
+						free(vector_slot(matchvec, i));
+				}
+				vector_free(matchvec);
+
+				/* Make new matchvec. */
+				matchvec = vector_init(INIT_MATCHVEC_SIZE);
+				vector_set(matchvec, lcdstr);
+				match_str = (char **)matchvec->index;
+				vector_only_wrapper_free(matchvec);
+
+				*status = CMD_COMPLETE_MATCH;
+				return match_str;
+			}
+		}
+	}
+
+	match_str = (char **)matchvec->index;
+	vector_only_wrapper_free(matchvec);
+	*status = CMD_COMPLETE_LIST_MATCH;
+	return match_str;
+}
+
+char **cmd_complete_command(vector vline, struct vty *vty, int *status)
+{
+	char **ret;
+
+	if (cmd_try_do_shortcut(vty->node, vector_slot(vline, 0))) {
+		enum node_type onode;
+		vector shifted_vline;
+		unsigned int index;
+
+		onode = vty->node;
+		vty->node = ENABLE_NODE;
+		/* We can try it on enable node, cos' the vty is authenticated */
+
+		shifted_vline = vector_init(vector_count(vline));
+		/* use memcpy? */
+		for (index = 1; index < vector_active(vline); index++) {
+			vector_set_index(shifted_vline, index - 1,
+					 vector_lookup(vline, index));
+		}
+
+		ret = cmd_complete_command_real(shifted_vline, vty, status);
+
+		vector_free(shifted_vline);
+		vty->node = onode;
+		return ret;
+	}
+
+	return cmd_complete_command_real(vline, vty, status);
+}
+
+/* return parent node */
+/* MUST eventually converge on CONFIG_NODE */
+enum node_type node_parent(enum node_type node)
+{
+	enum node_type ret;
+
+	assert(node > CONFIG_NODE);
+
+	switch (node) {
+	case BGP_VPNV4_NODE:
+	case BGP_IPV4_NODE:
+	case BGP_IPV4M_NODE:
+	case BGP_IPV6_NODE:
+		ret = BGP_NODE;
+		break;
+	case KEYCHAIN_KEY_NODE:
+		ret = KEYCHAIN_NODE;
+		break;
+	default:
+		ret = CONFIG_NODE;
+	}
+
+	return ret;
+}
+
+/* Execute command by argument vline vector. */
+static int
+cmd_execute_command_real(vector vline, struct vty *vty,
+			 struct cmd_element **cmd)
+{
+	unsigned int i;
+	unsigned int index;
+	vector cmd_vector;
+	struct cmd_element *cmd_element;
+	struct cmd_element *matched_element;
+	unsigned int matched_count, incomplete_count;
+	int argc;
+	const char *argv[CMD_ARGC_MAX];
+	enum match_type match = 0;
+	int varflag;
+	char *command;
+
+	/* Make copy of command elements. */
+	cmd_vector = vector_copy(cmd_node_vector(cmdvec, vty->node));
+
+	for (index = 0; index < vector_active(vline); index++)
+		if ((command = vector_slot(vline, index))) {
+			int ret;
+
+			match =
+			    cmd_filter_by_completion(command, cmd_vector,
+						     index);
+
+			if (match == vararg_match)
+				break;
+
+			ret =
+			    is_cmd_ambiguous(command, cmd_vector, index, match);
+
+			if (ret == 1) {
+				vector_free(cmd_vector);
+				return CMD_ERR_AMBIGUOUS;
+			} else if (ret == 2) {
+				vector_free(cmd_vector);
+				return CMD_ERR_NO_MATCH;
+			}
+		}
+
+	/* Check matched count. */
+	matched_element = NULL;
+	matched_count = 0;
+	incomplete_count = 0;
+
+	for (i = 0; i < vector_active(cmd_vector); i++)
+		if ((cmd_element = vector_slot(cmd_vector, i))) {
+			if (match == vararg_match
+			    || index >= cmd_element->cmdsize) {
+				matched_element = cmd_element;
+#if 0
+				printf("DEBUG: %s\n", cmd_element->string);
+#endif
+				matched_count++;
+			} else {
+				incomplete_count++;
+			}
+		}
+
+	/* Finish of using cmd_vector. */
+	vector_free(cmd_vector);
+
+	/* To execute command, matched_count must be 1. */
+	if (matched_count == 0) {
+		if (incomplete_count)
+			return CMD_ERR_INCOMPLETE;
+		else
+			return CMD_ERR_NO_MATCH;
+	}
+
+	if (matched_count > 1)
+		return CMD_ERR_AMBIGUOUS;
+
+	/* Argument treatment */
+	varflag = 0;
+	argc = 0;
+
+	for (i = 0; i < vector_active(vline); i++) {
+		if (varflag)
+			argv[argc++] = vector_slot(vline, i);
+		else {
+			vector descvec =
+			    vector_slot(matched_element->strvec, i);
+
+			if (vector_active(descvec) == 1) {
+				struct desc *desc = vector_slot(descvec, 0);
+
+				if (CMD_VARARG(desc->cmd))
+					varflag = 1;
+
+				if (varflag || CMD_VARIABLE(desc->cmd)
+				    || CMD_OPTION(desc->cmd))
+					argv[argc++] = vector_slot(vline, i);
+			} else
+				argv[argc++] = vector_slot(vline, i);
+		}
+
+		if (argc >= CMD_ARGC_MAX)
+			return CMD_ERR_EXEED_ARGC_MAX;
+	}
+
+	/* For vtysh execution. */
+	if (cmd)
+		*cmd = matched_element;
+
+	if (matched_element->daemon)
+		return CMD_SUCCESS_DAEMON;
+
+	/* Execute matched command. */
+	return (*matched_element->func) (matched_element, vty, argc, argv);
+}
+
+int
+cmd_execute_command(vector vline, struct vty *vty, struct cmd_element **cmd,
+		    int vtysh)
+{
+	int ret, saved_ret, tried = 0;
+	enum node_type onode, try_node;
+
+	onode = try_node = vty->node;
+
+	if (cmd_try_do_shortcut(vty->node, vector_slot(vline, 0))) {
+		vector shifted_vline;
+		unsigned int index;
+
+		vty->node = ENABLE_NODE;
+		/* We can try it on enable node, cos' the vty is authenticated */
+
+		shifted_vline = vector_init(vector_count(vline));
+		/* use memcpy? */
+		for (index = 1; index < vector_active(vline); index++) {
+			vector_set_index(shifted_vline, index - 1,
+					 vector_lookup(vline, index));
+		}
+
+		ret = cmd_execute_command_real(shifted_vline, vty, cmd);
+
+		vector_free(shifted_vline);
+		vty->node = onode;
+		return ret;
+	}
+
+	saved_ret = ret = cmd_execute_command_real(vline, vty, cmd);
+
+	if (vtysh)
+		return saved_ret;
+
+	/* This assumes all nodes above CONFIG_NODE are childs of CONFIG_NODE */
+	while (ret != CMD_SUCCESS && ret != CMD_WARNING
+	       && vty->node > CONFIG_NODE) {
+		try_node = node_parent(try_node);
+		vty->node = try_node;
+		ret = cmd_execute_command_real(vline, vty, cmd);
+		tried = 1;
+		if (ret == CMD_SUCCESS || ret == CMD_WARNING) {
+			/* succesfull command, leave the node as is */
+			return ret;
+		}
+	}
+	/* no command succeeded, reset the vty to the original node and
+	   return the error for this node */
+	if (tried)
+		vty->node = onode;
+	return saved_ret;
+}
+
+/* Execute command by argument readline. */
+int
+cmd_execute_command_strict(vector vline, struct vty *vty,
+			   struct cmd_element **cmd)
+{
+	unsigned int i;
+	unsigned int index;
+	vector cmd_vector;
+	struct cmd_element *cmd_element;
+	struct cmd_element *matched_element;
+	unsigned int matched_count, incomplete_count;
+	int argc;
+	const char *argv[CMD_ARGC_MAX];
+	int varflag;
+	enum match_type match = 0;
+	char *command;
+
+	/* Make copy of command element */
+	cmd_vector = vector_copy(cmd_node_vector(cmdvec, vty->node));
+
+	for (index = 0; index < vector_active(vline); index++)
+		if ((command = vector_slot(vline, index))) {
+			int ret;
+
+			match = cmd_filter_by_string(vector_slot(vline, index),
+						     cmd_vector, index);
+
+			/* If command meets '.VARARG' then finish matching. */
+			if (match == vararg_match)
+				break;
+
+			ret =
+			    is_cmd_ambiguous(command, cmd_vector, index, match);
+			if (ret == 1) {
+				vector_free(cmd_vector);
+				return CMD_ERR_AMBIGUOUS;
+			}
+			if (ret == 2) {
+				vector_free(cmd_vector);
+				return CMD_ERR_NO_MATCH;
+			}
+		}
+
+	/* Check matched count. */
+	matched_element = NULL;
+	matched_count = 0;
+	incomplete_count = 0;
+	for (i = 0; i < vector_active(cmd_vector); i++)
+		if (vector_slot(cmd_vector, i) != NULL) {
+			cmd_element = vector_slot(cmd_vector, i);
+
+			if (match == vararg_match
+			    || index >= cmd_element->cmdsize) {
+				matched_element = cmd_element;
+				matched_count++;
+			} else
+				incomplete_count++;
+		}
+
+	/* Finish of using cmd_vector. */
+	vector_free(cmd_vector);
+
+	/* To execute command, matched_count must be 1. */
+	if (matched_count == 0) {
+		if (incomplete_count)
+			return CMD_ERR_INCOMPLETE;
+		else
+			return CMD_ERR_NO_MATCH;
+	}
+
+	if (matched_count > 1)
+		return CMD_ERR_AMBIGUOUS;
+
+	/* Argument treatment */
+	varflag = 0;
+	argc = 0;
+
+	for (i = 0; i < vector_active(vline); i++) {
+		if (varflag)
+			argv[argc++] = vector_slot(vline, i);
+		else {
+			vector descvec =
+			    vector_slot(matched_element->strvec, i);
+
+			if (vector_active(descvec) == 1) {
+				struct desc *desc = vector_slot(descvec, 0);
+
+				if (CMD_VARARG(desc->cmd))
+					varflag = 1;
+
+				if (varflag || CMD_VARIABLE(desc->cmd)
+				    || CMD_OPTION(desc->cmd))
+					argv[argc++] = vector_slot(vline, i);
+			} else
+				argv[argc++] = vector_slot(vline, i);
+		}
+
+		if (argc >= CMD_ARGC_MAX)
+			return CMD_ERR_EXEED_ARGC_MAX;
+	}
+
+	/* For vtysh execution. */
+	if (cmd)
+		*cmd = matched_element;
+
+	if (matched_element->daemon)
+		return CMD_SUCCESS_DAEMON;
+
+	/* Now execute matched command */
+	return (*matched_element->func) (matched_element, vty, argc, argv);
+}
+
+#if 0
+/* Configration make from file. */
+int config_from_file(struct vty *vty, FILE * fp)
+{
+	int ret;
+	vector vline;
+
+	while (fgets(vty->buf, VTY_BUFSIZ, fp)) {
+		vline = cmd_make_strvec(vty->buf);
+
+		/* In case of comment line */
+		if (vline == NULL)
+			continue;
+		/* Execute configuration command : this is strict match */
+		ret = cmd_execute_command_strict(vline, vty, NULL);
+
+		/* Try again with setting node to CONFIG_NODE */
+		while (ret != CMD_SUCCESS && ret != CMD_WARNING
+		       && ret != CMD_ERR_NOTHING_TODO
+		       && vty->node != CONFIG_NODE) {
+			vty->node = node_parent(vty->node);
+			ret = cmd_execute_command_strict(vline, vty, NULL);
+		}
+
+		cmd_free_strvec(vline);
+
+		if (ret != CMD_SUCCESS && ret != CMD_WARNING
+		    && ret != CMD_ERR_NOTHING_TODO)
+			return ret;
+	}
+	return CMD_SUCCESS;
+}
+#endif
+
+/* Configration from terminal */
+DEFUN(config_terminal,
+      config_terminal_cmd,
+      "configure terminal",
+      "Configuration from vty interface\n" "Configuration terminal\n")
+{
+	if (vty_config_lock(vty))
+		vty->node = CONFIG_NODE;
+	else {
+		vty_out(vty, "VTY configuration is locked by other VTY%s",
+			VTY_NEWLINE);
+		return CMD_WARNING;
+	}
+	return CMD_SUCCESS;
+}
+
+/* Enable command */
+DEFUN(enable, config_enable_cmd, "enable", "Turn on privileged mode command\n")
+{
+	/* If enable password is NULL, change to ENABLE_NODE */
+	if ((host.enable == NULL && host.enable_encrypt == NULL) ||
+	    vty->type == VTY_SHELL_SERV)
+		vty->node = ENABLE_NODE;
+	else
+		vty->node = AUTH_ENABLE_NODE;
+
+	return CMD_SUCCESS;
+}
+
+/* Disable command */
+DEFUN(disable,
+      config_disable_cmd, "disable", "Turn off privileged mode command\n")
+{
+	if (vty->node == ENABLE_NODE)
+		vty->node = VIEW_NODE;
+	return CMD_SUCCESS;
+}
+
+/* Down vty node level. */
+DEFUN(config_exit,
+      config_exit_cmd, "exit", "Exit current mode and down to previous mode\n")
+{
+	switch (vty->node) {
+	case BTS_NODE:
+		vty->node = VIEW_NODE;
+		break;
+	case TRX_NODE:
+		vty->node = BTS_NODE;
+		break;
+	case TS_NODE:
+		vty->node = TRX_NODE;
+		break;
+	case VIEW_NODE:
+	case ENABLE_NODE:
+		if (0)		//vty_shell (vty))
+			exit(0);
+		else
+			vty->status = VTY_CLOSE;
+		break;
+	case CONFIG_NODE:
+		vty->node = ENABLE_NODE;
+		vty_config_unlock(vty);
+		break;
+	case INTERFACE_NODE:
+	case ZEBRA_NODE:
+	case BGP_NODE:
+	case RIP_NODE:
+	case RIPNG_NODE:
+	case OSPF_NODE:
+	case OSPF6_NODE:
+	case ISIS_NODE:
+	case KEYCHAIN_NODE:
+	case MASC_NODE:
+	case RMAP_NODE:
+	case VTY_NODE:
+		vty->node = CONFIG_NODE;
+		break;
+	case BGP_VPNV4_NODE:
+	case BGP_IPV4_NODE:
+	case BGP_IPV4M_NODE:
+	case BGP_IPV6_NODE:
+		vty->node = BGP_NODE;
+		break;
+	case KEYCHAIN_KEY_NODE:
+		vty->node = KEYCHAIN_NODE;
+		break;
+	default:
+		break;
+	}
+	return CMD_SUCCESS;
+}
+
+/* quit is alias of exit. */
+ALIAS(config_exit,
+      config_quit_cmd, "quit", "Exit current mode and down to previous mode\n")
+
+/* End of configuration. */
+    DEFUN(config_end,
+      config_end_cmd, "end", "End current mode and change to enable mode.")
+{
+	switch (vty->node) {
+	case VIEW_NODE:
+	case ENABLE_NODE:
+		/* Nothing to do. */
+		break;
+	case CONFIG_NODE:
+	case INTERFACE_NODE:
+	case ZEBRA_NODE:
+	case RIP_NODE:
+	case RIPNG_NODE:
+	case BGP_NODE:
+	case BGP_VPNV4_NODE:
+	case BGP_IPV4_NODE:
+	case BGP_IPV4M_NODE:
+	case BGP_IPV6_NODE:
+	case RMAP_NODE:
+	case OSPF_NODE:
+	case OSPF6_NODE:
+	case ISIS_NODE:
+	case KEYCHAIN_NODE:
+	case KEYCHAIN_KEY_NODE:
+	case MASC_NODE:
+	case VTY_NODE:
+		vty_config_unlock(vty);
+		vty->node = ENABLE_NODE;
+		break;
+	default:
+		break;
+	}
+	return CMD_SUCCESS;
+}
+
+/* Show version. */
+DEFUN(show_version,
+      show_version_cmd, "show version", SHOW_STR "Displays program version\n")
+{
+	vty_out(vty, "%s %s (%s).%s", QUAGGA_PROGNAME, QUAGGA_VERSION,
+		host.name ? host.name : "", VTY_NEWLINE);
+	vty_out(vty, "%s%s", QUAGGA_COPYRIGHT, VTY_NEWLINE);
+
+	return CMD_SUCCESS;
+}
+
+/* Help display function for all node. */
+DEFUN(config_help,
+      config_help_cmd, "help", "Description of the interactive help system\n")
+{
+	vty_out(vty,
+		"This VTY provides advanced help features.  When you need help,%s\
+anytime at the command line please press '?'.%s\
+%s\
+If nothing matches, the help list will be empty and you must backup%s\
+ until entering a '?' shows the available options.%s\
+Two styles of help are provided:%s\
+1. Full help is available when you are ready to enter a%s\
+command argument (e.g. 'show ?') and describes each possible%s\
+argument.%s\
+2. Partial help is provided when an abbreviated argument is entered%s\
+   and you want to know what arguments match the input%s\
+   (e.g. 'show me?'.)%s%s", VTY_NEWLINE, VTY_NEWLINE, VTY_NEWLINE,
+		VTY_NEWLINE, VTY_NEWLINE, VTY_NEWLINE, VTY_NEWLINE, VTY_NEWLINE, VTY_NEWLINE, VTY_NEWLINE, VTY_NEWLINE, VTY_NEWLINE, VTY_NEWLINE);
+	return CMD_SUCCESS;
+}
+
+/* Help display function for all node. */
+DEFUN(config_list, config_list_cmd, "list", "Print command list\n")
+{
+	unsigned int i;
+	struct cmd_node *cnode = vector_slot(cmdvec, vty->node);
+	struct cmd_element *cmd;
+
+	for (i = 0; i < vector_active(cnode->cmd_vector); i++)
+		if ((cmd = vector_slot(cnode->cmd_vector, i)) != NULL
+		    && !(cmd->attr == CMD_ATTR_DEPRECATED
+			 || cmd->attr == CMD_ATTR_HIDDEN))
+			vty_out(vty, "  %s%s", cmd->string, VTY_NEWLINE);
+	return CMD_SUCCESS;
+}
+
+#if 0
+/* Write current configuration into file. */
+DEFUN(config_write_file,
+      config_write_file_cmd,
+      "write file",
+      "Write running configuration to memory, network, or terminal\n"
+      "Write to configuration file\n")
+{
+	unsigned int i;
+	int fd;
+	struct cmd_node *node;
+	char *config_file;
+	char *config_file_tmp = NULL;
+	char *config_file_sav = NULL;
+	struct vty *file_vty;
+
+	/* Check and see if we are operating under vtysh configuration */
+	if (host.config == NULL) {
+		vty_out(vty, "Can't save to configuration file, using vtysh.%s",
+			VTY_NEWLINE);
+		return CMD_WARNING;
+	}
+
+	/* Get filename. */
+	config_file = host.config;
+
+	config_file_sav =
+	    malloc(strlen(config_file) + strlen(CONF_BACKUP_EXT) + 1);
+	strcpy(config_file_sav, config_file);
+	strcat(config_file_sav, CONF_BACKUP_EXT);
+
+	config_file_tmp = malloc(strlen(config_file) + 8);
+	sprintf(config_file_tmp, "%s.XXXXXX", config_file);
+
+	/* Open file to configuration write. */
+	fd = mkstemp(config_file_tmp);
+	if (fd < 0) {
+		vty_out(vty, "Can't open configuration file %s.%s",
+			config_file_tmp, VTY_NEWLINE);
+		free(config_file_tmp);
+		free(config_file_sav);
+		return CMD_WARNING;
+	}
+
+	/* Make vty for configuration file. */
+	file_vty = vty_new();
+	file_vty->fd = fd;
+	file_vty->type = VTY_FILE;
+
+	/* Config file header print. */
+	vty_out(file_vty, "!\n! Zebra configuration saved from vty\n!   ");
+	//vty_time_print (file_vty, 1);
+	vty_out(file_vty, "!\n");
+
+	for (i = 0; i < vector_active(cmdvec); i++)
+		if ((node = vector_slot(cmdvec, i)) && node->func) {
+			if ((*node->func) (file_vty))
+				vty_out(file_vty, "!\n");
+		}
+	vty_close(file_vty);
+
+	if (unlink(config_file_sav) != 0)
+		if (errno != ENOENT) {
+			vty_out(vty,
+				"Can't unlink backup configuration file %s.%s",
+				config_file_sav, VTY_NEWLINE);
+			free(config_file_sav);
+			free(config_file_tmp);
+			unlink(config_file_tmp);
+			return CMD_WARNING;
+		}
+	if (link(config_file, config_file_sav) != 0) {
+		vty_out(vty, "Can't backup old configuration file %s.%s",
+			config_file_sav, VTY_NEWLINE);
+		free(config_file_sav);
+		free(config_file_tmp);
+		unlink(config_file_tmp);
+		return CMD_WARNING;
+	}
+	sync();
+	if (unlink(config_file) != 0) {
+		vty_out(vty, "Can't unlink configuration file %s.%s",
+			config_file, VTY_NEWLINE);
+		free(config_file_sav);
+		free(config_file_tmp);
+		unlink(config_file_tmp);
+		return CMD_WARNING;
+	}
+	if (link(config_file_tmp, config_file) != 0) {
+		vty_out(vty, "Can't save configuration file %s.%s", config_file,
+			VTY_NEWLINE);
+		free(config_file_sav);
+		free(config_file_tmp);
+		unlink(config_file_tmp);
+		return CMD_WARNING;
+	}
+	unlink(config_file_tmp);
+	sync();
+
+	free(config_file_sav);
+	free(config_file_tmp);
+
+	if (chmod(config_file, CONFIGFILE_MASK) != 0) {
+		vty_out(vty, "Can't chmod configuration file %s: %s (%d).%s",
+			config_file, safe_strerror(errno), errno, VTY_NEWLINE);
+		return CMD_WARNING;
+	}
+
+	vty_out(vty, "Configuration saved to %s%s", config_file, VTY_NEWLINE);
+	return CMD_SUCCESS;
+}
+
+ALIAS(config_write_file,
+      config_write_cmd,
+      "write", "Write running configuration to memory, network, or terminal\n")
+
+    ALIAS(config_write_file,
+      config_write_memory_cmd,
+      "write memory",
+      "Write running configuration to memory, network, or terminal\n"
+      "Write configuration to the file (same as write file)\n")
+
+    ALIAS(config_write_file,
+      copy_runningconfig_startupconfig_cmd,
+      "copy running-config startup-config",
+      "Copy configuration\n"
+      "Copy running config to... \n"
+      "Copy running config to startup config (same as write file)\n")
+
+/* Write current configuration into the terminal. */
+    DEFUN(config_write_terminal,
+      config_write_terminal_cmd,
+      "write terminal",
+      "Write running configuration to memory, network, or terminal\n"
+      "Write to terminal\n")
+{
+	unsigned int i;
+	struct cmd_node *node;
+
+	if (vty->type == VTY_SHELL_SERV) {
+		for (i = 0; i < vector_active(cmdvec); i++)
+			if ((node = vector_slot(cmdvec, i)) && node->func
+			    && node->vtysh) {
+				if ((*node->func) (vty))
+					vty_out(vty, "!%s", VTY_NEWLINE);
+			}
+	} else {
+		vty_out(vty, "%sCurrent configuration:%s", VTY_NEWLINE,
+			VTY_NEWLINE);
+		vty_out(vty, "!%s", VTY_NEWLINE);
+
+		for (i = 0; i < vector_active(cmdvec); i++)
+			if ((node = vector_slot(cmdvec, i)) && node->func) {
+				if ((*node->func) (vty))
+					vty_out(vty, "!%s", VTY_NEWLINE);
+			}
+		vty_out(vty, "end%s", VTY_NEWLINE);
+	}
+	return CMD_SUCCESS;
+}
+
+/* Write current configuration into the terminal. */
+ALIAS(config_write_terminal,
+      show_running_config_cmd,
+      "show running-config", SHOW_STR "running configuration\n")
+
+/* Write startup configuration into the terminal. */
+    DEFUN(show_startup_config,
+      show_startup_config_cmd,
+      "show startup-config", SHOW_STR "Contentes of startup configuration\n")
+{
+	char buf[BUFSIZ];
+	FILE *confp;
+
+	confp = fopen(host.config, "r");
+	if (confp == NULL) {
+		vty_out(vty, "Can't open configuration file [%s]%s",
+			host.config, VTY_NEWLINE);
+		return CMD_WARNING;
+	}
+
+	while (fgets(buf, BUFSIZ, confp)) {
+		char *cp = buf;
+
+		while (*cp != '\r' && *cp != '\n' && *cp != '\0')
+			cp++;
+		*cp = '\0';
+
+		vty_out(vty, "%s%s", buf, VTY_NEWLINE);
+	}
+
+	fclose(confp);
+
+	return CMD_SUCCESS;
+}
+#endif
+
+/* Hostname configuration */
+DEFUN(config_hostname,
+      hostname_cmd,
+      "hostname WORD",
+      "Set system's network name\n" "This system's network name\n")
+{
+	if (!isalpha((int)*argv[0])) {
+		vty_out(vty, "Please specify string starting with alphabet%s",
+			VTY_NEWLINE);
+		return CMD_WARNING;
+	}
+
+	if (host.name)
+		free(host.name);
+
+	host.name = strdup(argv[0]);
+	return CMD_SUCCESS;
+}
+
+DEFUN(config_no_hostname,
+      no_hostname_cmd,
+      "no hostname [HOSTNAME]",
+      NO_STR "Reset system's network name\n" "Host name of this router\n")
+{
+	if (host.name)
+		free(host.name);
+	host.name = NULL;
+	return CMD_SUCCESS;
+}
+
+/* VTY interface password set. */
+DEFUN(config_password, password_cmd,
+      "password (8|) WORD",
+      "Assign the terminal connection password\n"
+      "Specifies a HIDDEN password will follow\n"
+      "dummy string \n" "The HIDDEN line password string\n")
+{
+	/* Argument check. */
+	if (argc == 0) {
+		vty_out(vty, "Please specify password.%s", VTY_NEWLINE);
+		return CMD_WARNING;
+	}
+
+	if (argc == 2) {
+		if (*argv[0] == '8') {
+			if (host.password)
+				free(host.password);
+			host.password = NULL;
+			if (host.password_encrypt)
+				free(host.password_encrypt);
+			host.password_encrypt = strdup(strdup(argv[1]));
+			return CMD_SUCCESS;
+		} else {
+			vty_out(vty, "Unknown encryption type.%s", VTY_NEWLINE);
+			return CMD_WARNING;
+		}
+	}
+
+	if (!isalnum((int)*argv[0])) {
+		vty_out(vty,
+			"Please specify string starting with alphanumeric%s",
+			VTY_NEWLINE);
+		return CMD_WARNING;
+	}
+
+	if (host.password)
+		free(host.password);
+	host.password = NULL;
+
+	if (host.encrypt) {
+		if (host.password_encrypt)
+			free(host.password_encrypt);
+		host.password_encrypt = strdup(zencrypt(argv[0]));
+	} else
+		host.password = strdup(argv[0]);
+
+	return CMD_SUCCESS;
+}
+
+ALIAS(config_password, password_text_cmd,
+      "password LINE",
+      "Assign the terminal connection password\n"
+      "The UNENCRYPTED (cleartext) line password\n")
+
+/* VTY enable password set. */
+    DEFUN(config_enable_password, enable_password_cmd,
+      "enable password (8|) WORD",
+      "Modify enable password parameters\n"
+      "Assign the privileged level password\n"
+      "Specifies a HIDDEN password will follow\n"
+      "dummy string \n" "The HIDDEN 'enable' password string\n")
+{
+	/* Argument check. */
+	if (argc == 0) {
+		vty_out(vty, "Please specify password.%s", VTY_NEWLINE);
+		return CMD_WARNING;
+	}
+
+	/* Crypt type is specified. */
+	if (argc == 2) {
+		if (*argv[0] == '8') {
+			if (host.enable)
+				free(host.enable);
+			host.enable = NULL;
+
+			if (host.enable_encrypt)
+				free(host.enable_encrypt);
+			host.enable_encrypt = strdup(argv[1]);
+
+			return CMD_SUCCESS;
+		} else {
+			vty_out(vty, "Unknown encryption type.%s", VTY_NEWLINE);
+			return CMD_WARNING;
+		}
+	}
+
+	if (!isalnum((int)*argv[0])) {
+		vty_out(vty,
+			"Please specify string starting with alphanumeric%s",
+			VTY_NEWLINE);
+		return CMD_WARNING;
+	}
+
+	if (host.enable)
+		free(host.enable);
+	host.enable = NULL;
+
+	/* Plain password input. */
+	if (host.encrypt) {
+		if (host.enable_encrypt)
+			free(host.enable_encrypt);
+		host.enable_encrypt = strdup(zencrypt(argv[0]));
+	} else
+		host.enable = strdup(argv[0]);
+
+	return CMD_SUCCESS;
+}
+
+ALIAS(config_enable_password,
+      enable_password_text_cmd,
+      "enable password LINE",
+      "Modify enable password parameters\n"
+      "Assign the privileged level password\n"
+      "The UNENCRYPTED (cleartext) 'enable' password\n")
+
+/* VTY enable password delete. */
+    DEFUN(no_config_enable_password, no_enable_password_cmd,
+      "no enable password",
+      NO_STR
+      "Modify enable password parameters\n"
+      "Assign the privileged level password\n")
+{
+	if (host.enable)
+		free(host.enable);
+	host.enable = NULL;
+
+	if (host.enable_encrypt)
+		free(host.enable_encrypt);
+	host.enable_encrypt = NULL;
+
+	return CMD_SUCCESS;
+}
+
+DEFUN(service_password_encrypt,
+      service_password_encrypt_cmd,
+      "service password-encryption",
+      "Set up miscellaneous service\n" "Enable encrypted passwords\n")
+{
+	if (host.encrypt)
+		return CMD_SUCCESS;
+
+	host.encrypt = 1;
+
+	if (host.password) {
+		if (host.password_encrypt)
+			free(host.password_encrypt);
+		host.password_encrypt = strdup(zencrypt(host.password));
+	}
+	if (host.enable) {
+		if (host.enable_encrypt)
+			free(host.enable_encrypt);
+		host.enable_encrypt = strdup(zencrypt(host.enable));
+	}
+
+	return CMD_SUCCESS;
+}
+
+DEFUN(no_service_password_encrypt,
+      no_service_password_encrypt_cmd,
+      "no service password-encryption",
+      NO_STR "Set up miscellaneous service\n" "Enable encrypted passwords\n")
+{
+	if (!host.encrypt)
+		return CMD_SUCCESS;
+
+	host.encrypt = 0;
+
+	if (host.password_encrypt)
+		free(host.password_encrypt);
+	host.password_encrypt = NULL;
+
+	if (host.enable_encrypt)
+		free(host.enable_encrypt);
+	host.enable_encrypt = NULL;
+
+	return CMD_SUCCESS;
+}
+
+DEFUN(config_terminal_length, config_terminal_length_cmd,
+      "terminal length <0-512>",
+      "Set terminal line parameters\n"
+      "Set number of lines on a screen\n"
+      "Number of lines on screen (0 for no pausing)\n")
+{
+	int lines;
+	char *endptr = NULL;
+
+	lines = strtol(argv[0], &endptr, 10);
+	if (lines < 0 || lines > 512 || *endptr != '\0') {
+		vty_out(vty, "length is malformed%s", VTY_NEWLINE);
+		return CMD_WARNING;
+	}
+	vty->lines = lines;
+
+	return CMD_SUCCESS;
+}
+
+DEFUN(config_terminal_no_length, config_terminal_no_length_cmd,
+      "terminal no length",
+      "Set terminal line parameters\n"
+      NO_STR "Set number of lines on a screen\n")
+{
+	vty->lines = -1;
+	return CMD_SUCCESS;
+}
+
+DEFUN(service_terminal_length, service_terminal_length_cmd,
+      "service terminal-length <0-512>",
+      "Set up miscellaneous service\n"
+      "System wide terminal length configuration\n"
+      "Number of lines of VTY (0 means no line control)\n")
+{
+	int lines;
+	char *endptr = NULL;
+
+	lines = strtol(argv[0], &endptr, 10);
+	if (lines < 0 || lines > 512 || *endptr != '\0') {
+		vty_out(vty, "length is malformed%s", VTY_NEWLINE);
+		return CMD_WARNING;
+	}
+	host.lines = lines;
+
+	return CMD_SUCCESS;
+}
+
+DEFUN(no_service_terminal_length, no_service_terminal_length_cmd,
+      "no service terminal-length [<0-512>]",
+      NO_STR
+      "Set up miscellaneous service\n"
+      "System wide terminal length configuration\n"
+      "Number of lines of VTY (0 means no line control)\n")
+{
+	host.lines = -1;
+	return CMD_SUCCESS;
+}
+
+DEFUN_HIDDEN(do_echo,
+	     echo_cmd,
+	     "echo .MESSAGE",
+	     "Echo a message back to the vty\n" "The message to echo\n")
+{
+	char *message;
+
+	vty_out(vty, "%s%s",
+		((message =
+		  argv_concat(argv, argc, 0)) ? message : ""), VTY_NEWLINE);
+	if (message)
+		free(message);
+	return CMD_SUCCESS;
+}
+
+#if 0
+DEFUN(config_logmsg,
+      config_logmsg_cmd,
+      "logmsg " LOG_LEVELS " .MESSAGE",
+      "Send a message to enabled logging destinations\n"
+      LOG_LEVEL_DESC "The message to send\n")
+{
+	int level;
+	char *message;
+
+	if ((level = level_match(argv[0])) == ZLOG_DISABLED)
+		return CMD_ERR_NO_MATCH;
+
+	zlog(NULL, level,
+	     ((message = argv_concat(argv, argc, 1)) ? message : ""));
+	if (message)
+		free(message);
+	return CMD_SUCCESS;
+}
+
+DEFUN(show_logging,
+      show_logging_cmd,
+      "show logging", SHOW_STR "Show current logging configuration\n")
+{
+	struct zlog *zl = zlog_default;
+
+	vty_out(vty, "Syslog logging: ");
+	if (zl->maxlvl[ZLOG_DEST_SYSLOG] == ZLOG_DISABLED)
+		vty_out(vty, "disabled");
+	else
+		vty_out(vty, "level %s, facility %s, ident %s",
+			zlog_priority[zl->maxlvl[ZLOG_DEST_SYSLOG]],
+			facility_name(zl->facility), zl->ident);
+	vty_out(vty, "%s", VTY_NEWLINE);
+
+	vty_out(vty, "Stdout logging: ");
+	if (zl->maxlvl[ZLOG_DEST_STDOUT] == ZLOG_DISABLED)
+		vty_out(vty, "disabled");
+	else
+		vty_out(vty, "level %s",
+			zlog_priority[zl->maxlvl[ZLOG_DEST_STDOUT]]);
+	vty_out(vty, "%s", VTY_NEWLINE);
+
+	vty_out(vty, "Monitor logging: ");
+	if (zl->maxlvl[ZLOG_DEST_MONITOR] == ZLOG_DISABLED)
+		vty_out(vty, "disabled");
+	else
+		vty_out(vty, "level %s",
+			zlog_priority[zl->maxlvl[ZLOG_DEST_MONITOR]]);
+	vty_out(vty, "%s", VTY_NEWLINE);
+
+	vty_out(vty, "File logging: ");
+	if ((zl->maxlvl[ZLOG_DEST_FILE] == ZLOG_DISABLED) || !zl->fp)
+		vty_out(vty, "disabled");
+	else
+		vty_out(vty, "level %s, filename %s",
+			zlog_priority[zl->maxlvl[ZLOG_DEST_FILE]],
+			zl->filename);
+	vty_out(vty, "%s", VTY_NEWLINE);
+
+	vty_out(vty, "Protocol name: %s%s",
+		zlog_proto_names[zl->protocol], VTY_NEWLINE);
+	vty_out(vty, "Record priority: %s%s",
+		(zl->record_priority ? "enabled" : "disabled"), VTY_NEWLINE);
+
+	return CMD_SUCCESS;
+}
+
+DEFUN(config_log_stdout,
+      config_log_stdout_cmd,
+      "log stdout", "Logging control\n" "Set stdout logging level\n")
+{
+	zlog_set_level(NULL, ZLOG_DEST_STDOUT, zlog_default->default_lvl);
+	return CMD_SUCCESS;
+}
+
+DEFUN(config_log_stdout_level,
+      config_log_stdout_level_cmd,
+      "log stdout " LOG_LEVELS,
+      "Logging control\n" "Set stdout logging level\n" LOG_LEVEL_DESC)
+{
+	int level;
+
+	if ((level = level_match(argv[0])) == ZLOG_DISABLED)
+		return CMD_ERR_NO_MATCH;
+	zlog_set_level(NULL, ZLOG_DEST_STDOUT, level);
+	return CMD_SUCCESS;
+}
+
+DEFUN(no_config_log_stdout,
+      no_config_log_stdout_cmd,
+      "no log stdout [LEVEL]",
+      NO_STR "Logging control\n" "Cancel logging to stdout\n" "Logging level\n")
+{
+	zlog_set_level(NULL, ZLOG_DEST_STDOUT, ZLOG_DISABLED);
+	return CMD_SUCCESS;
+}
+
+DEFUN(config_log_monitor,
+      config_log_monitor_cmd,
+      "log monitor",
+      "Logging control\n" "Set terminal line (monitor) logging level\n")
+{
+	zlog_set_level(NULL, ZLOG_DEST_MONITOR, zlog_default->default_lvl);
+	return CMD_SUCCESS;
+}
+
+DEFUN(config_log_monitor_level,
+      config_log_monitor_level_cmd,
+      "log monitor " LOG_LEVELS,
+      "Logging control\n"
+      "Set terminal line (monitor) logging level\n" LOG_LEVEL_DESC)
+{
+	int level;
+
+	if ((level = level_match(argv[0])) == ZLOG_DISABLED)
+		return CMD_ERR_NO_MATCH;
+	zlog_set_level(NULL, ZLOG_DEST_MONITOR, level);
+	return CMD_SUCCESS;
+}
+
+DEFUN(no_config_log_monitor,
+      no_config_log_monitor_cmd,
+      "no log monitor [LEVEL]",
+      NO_STR
+      "Logging control\n"
+      "Disable terminal line (monitor) logging\n" "Logging level\n")
+{
+	zlog_set_level(NULL, ZLOG_DEST_MONITOR, ZLOG_DISABLED);
+	return CMD_SUCCESS;
+}
+
+static int set_log_file(struct vty *vty, const char *fname, int loglevel)
+{
+	int ret;
+	char *p = NULL;
+	const char *fullpath;
+
+	/* Path detection. */
+	if (!IS_DIRECTORY_SEP(*fname)) {
+		char cwd[MAXPATHLEN + 1];
+		cwd[MAXPATHLEN] = '\0';
+
+		if (getcwd(cwd, MAXPATHLEN) == NULL) {
+			zlog_err("config_log_file: Unable to alloc mem!");
+			return CMD_WARNING;
+		}
+
+		if ((p = malloc(strlen(cwd) + strlen(fname) + 2))
+		    == NULL) {
+			zlog_err("config_log_file: Unable to alloc mem!");
+			return CMD_WARNING;
+		}
+		sprintf(p, "%s/%s", cwd, fname);
+		fullpath = p;
+	} else
+		fullpath = fname;
+
+	ret = zlog_set_file(NULL, fullpath, loglevel);
+
+	if (p)
+		free(p);
+
+	if (!ret) {
+		vty_out(vty, "can't open logfile %s\n", fname);
+		return CMD_WARNING;
+	}
+
+	if (host.logfile)
+		free(host.logfile);
+
+	host.logfile = strdup(fname);
+
+	return CMD_SUCCESS;
+}
+
+DEFUN(config_log_file,
+      config_log_file_cmd,
+      "log file FILENAME",
+      "Logging control\n" "Logging to file\n" "Logging filename\n")
+{
+	return set_log_file(vty, argv[0], zlog_default->default_lvl);
+}
+
+DEFUN(config_log_file_level,
+      config_log_file_level_cmd,
+      "log file FILENAME " LOG_LEVELS,
+      "Logging control\n"
+      "Logging to file\n" "Logging filename\n" LOG_LEVEL_DESC)
+{
+	int level;
+
+	if ((level = level_match(argv[1])) == ZLOG_DISABLED)
+		return CMD_ERR_NO_MATCH;
+	return set_log_file(vty, argv[0], level);
+}
+
+DEFUN(no_config_log_file,
+      no_config_log_file_cmd,
+      "no log file [FILENAME]",
+      NO_STR
+      "Logging control\n" "Cancel logging to file\n" "Logging file name\n")
+{
+	zlog_reset_file(NULL);
+
+	if (host.logfile)
+		free(host.logfile);
+
+	host.logfile = NULL;
+
+	return CMD_SUCCESS;
+}
+
+ALIAS(no_config_log_file,
+      no_config_log_file_level_cmd,
+      "no log file FILENAME LEVEL",
+      NO_STR
+      "Logging control\n"
+      "Cancel logging to file\n" "Logging file name\n" "Logging level\n")
+
+    DEFUN(config_log_syslog,
+      config_log_syslog_cmd,
+      "log syslog", "Logging control\n" "Set syslog logging level\n")
+{
+	zlog_set_level(NULL, ZLOG_DEST_SYSLOG, zlog_default->default_lvl);
+	return CMD_SUCCESS;
+}
+
+DEFUN(config_log_syslog_level,
+      config_log_syslog_level_cmd,
+      "log syslog " LOG_LEVELS,
+      "Logging control\n" "Set syslog logging level\n" LOG_LEVEL_DESC)
+{
+	int level;
+
+	if ((level = level_match(argv[0])) == ZLOG_DISABLED)
+		return CMD_ERR_NO_MATCH;
+	zlog_set_level(NULL, ZLOG_DEST_SYSLOG, level);
+	return CMD_SUCCESS;
+}
+
+DEFUN_DEPRECATED(config_log_syslog_facility,
+		 config_log_syslog_facility_cmd,
+		 "log syslog facility " LOG_FACILITIES,
+		 "Logging control\n"
+		 "Logging goes to syslog\n"
+		 "(Deprecated) Facility parameter for syslog messages\n"
+		 LOG_FACILITY_DESC)
+{
+	int facility;
+
+	if ((facility = facility_match(argv[0])) < 0)
+		return CMD_ERR_NO_MATCH;
+
+	zlog_set_level(NULL, ZLOG_DEST_SYSLOG, zlog_default->default_lvl);
+	zlog_default->facility = facility;
+	return CMD_SUCCESS;
+}
+
+DEFUN(no_config_log_syslog,
+      no_config_log_syslog_cmd,
+      "no log syslog [LEVEL]",
+      NO_STR "Logging control\n" "Cancel logging to syslog\n" "Logging level\n")
+{
+	zlog_set_level(NULL, ZLOG_DEST_SYSLOG, ZLOG_DISABLED);
+	return CMD_SUCCESS;
+}
+
+ALIAS(no_config_log_syslog,
+      no_config_log_syslog_facility_cmd,
+      "no log syslog facility " LOG_FACILITIES,
+      NO_STR
+      "Logging control\n"
+      "Logging goes to syslog\n"
+      "Facility parameter for syslog messages\n" LOG_FACILITY_DESC)
+
+    DEFUN(config_log_facility,
+      config_log_facility_cmd,
+      "log facility " LOG_FACILITIES,
+      "Logging control\n"
+      "Facility parameter for syslog messages\n" LOG_FACILITY_DESC)
+{
+	int facility;
+
+	if ((facility = facility_match(argv[0])) < 0)
+		return CMD_ERR_NO_MATCH;
+	zlog_default->facility = facility;
+	return CMD_SUCCESS;
+}
+
+DEFUN(no_config_log_facility,
+      no_config_log_facility_cmd,
+      "no log facility [FACILITY]",
+      NO_STR
+      "Logging control\n"
+      "Reset syslog facility to default (daemon)\n" "Syslog facility\n")
+{
+	zlog_default->facility = LOG_DAEMON;
+	return CMD_SUCCESS;
+}
+
+DEFUN_DEPRECATED(config_log_trap,
+		 config_log_trap_cmd,
+		 "log trap " LOG_LEVELS,
+		 "Logging control\n"
+		 "(Deprecated) Set logging level and default for all destinations\n"
+		 LOG_LEVEL_DESC)
+{
+	int new_level;
+	int i;
+
+	if ((new_level = level_match(argv[0])) == ZLOG_DISABLED)
+		return CMD_ERR_NO_MATCH;
+
+	zlog_default->default_lvl = new_level;
+	for (i = 0; i < ZLOG_NUM_DESTS; i++)
+		if (zlog_default->maxlvl[i] != ZLOG_DISABLED)
+			zlog_default->maxlvl[i] = new_level;
+	return CMD_SUCCESS;
+}
+
+DEFUN_DEPRECATED(no_config_log_trap,
+		 no_config_log_trap_cmd,
+		 "no log trap [LEVEL]",
+		 NO_STR
+		 "Logging control\n"
+		 "Permit all logging information\n" "Logging level\n")
+{
+	zlog_default->default_lvl = LOG_DEBUG;
+	return CMD_SUCCESS;
+}
+
+DEFUN(config_log_record_priority,
+      config_log_record_priority_cmd,
+      "log record-priority",
+      "Logging control\n"
+      "Log the priority of the message within the message\n")
+{
+	zlog_default->record_priority = 1;
+	return CMD_SUCCESS;
+}
+
+DEFUN(no_config_log_record_priority,
+      no_config_log_record_priority_cmd,
+      "no log record-priority",
+      NO_STR
+      "Logging control\n"
+      "Do not log the priority of the message within the message\n")
+{
+	zlog_default->record_priority = 0;
+	return CMD_SUCCESS;
+}
+#endif
+
+DEFUN(banner_motd_file,
+      banner_motd_file_cmd,
+      "banner motd file [FILE]",
+      "Set banner\n" "Banner for motd\n" "Banner from a file\n" "Filename\n")
+{
+	if (host.motdfile)
+		free(host.motdfile);
+	host.motdfile = strdup(argv[0]);
+
+	return CMD_SUCCESS;
+}
+
+DEFUN(banner_motd_default,
+      banner_motd_default_cmd,
+      "banner motd default",
+      "Set banner string\n" "Strings for motd\n" "Default string\n")
+{
+	host.motd = default_motd;
+	return CMD_SUCCESS;
+}
+
+DEFUN(no_banner_motd,
+      no_banner_motd_cmd,
+      "no banner motd", NO_STR "Set banner string\n" "Strings for motd\n")
+{
+	host.motd = NULL;
+	if (host.motdfile)
+		free(host.motdfile);
+	host.motdfile = NULL;
+	return CMD_SUCCESS;
+}
+
+/* Set config filename.  Called from vty.c */
+void host_config_set(char *filename)
+{
+	host.config = strdup(filename);
+}
+
+void install_default(enum node_type node)
+{
+	install_element(node, &config_exit_cmd);
+	install_element(node, &config_quit_cmd);
+	install_element(node, &config_end_cmd);
+	install_element(node, &config_help_cmd);
+	install_element(node, &config_list_cmd);
+
+#if 0
+	install_element(node, &config_write_terminal_cmd);
+	install_element(node, &config_write_file_cmd);
+	install_element(node, &config_write_memory_cmd);
+	install_element(node, &config_write_cmd);
+	install_element(node, &show_running_config_cmd);
+#endif
+}
+
+/* Initialize command interface. Install basic nodes and commands. */
+void cmd_init(int terminal)
+{
+	/* Allocate initial top vector of commands. */
+	cmdvec = vector_init(VECTOR_MIN_SIZE);
+
+	/* Default host value settings. */
+	host.name = NULL;
+	//host.password = NULL;
+	host.password = "foo";
+	host.enable = NULL;
+	host.logfile = NULL;
+	host.config = NULL;
+	host.lines = -1;
+	host.motd = default_motd;
+	host.motdfile = NULL;
+
+	/* Install top nodes. */
+	install_node(&view_node, NULL);
+	install_node(&enable_node, NULL);
+	install_node(&auth_node, NULL);
+	install_node(&auth_enable_node, NULL);
+	install_node(&config_node, config_write_host);
+
+	/* Each node's basic commands. */
+	install_element(VIEW_NODE, &show_version_cmd);
+	if (terminal) {
+		install_element(VIEW_NODE, &config_list_cmd);
+		install_element(VIEW_NODE, &config_exit_cmd);
+		install_element(VIEW_NODE, &config_quit_cmd);
+		install_element(VIEW_NODE, &config_help_cmd);
+		install_element(VIEW_NODE, &config_enable_cmd);
+		install_element(VIEW_NODE, &config_terminal_length_cmd);
+		install_element(VIEW_NODE, &config_terminal_no_length_cmd);
+		install_element(VIEW_NODE, &echo_cmd);
+	}
+
+	if (terminal) {
+		install_default(ENABLE_NODE);
+		install_element(ENABLE_NODE, &config_disable_cmd);
+		install_element(ENABLE_NODE, &config_terminal_cmd);
+		//install_element (ENABLE_NODE, &copy_runningconfig_startupconfig_cmd);
+	}
+	//install_element (ENABLE_NODE, &show_startup_config_cmd);
+	install_element(ENABLE_NODE, &show_version_cmd);
+
+	if (terminal) {
+		install_element(ENABLE_NODE, &config_terminal_length_cmd);
+		install_element(ENABLE_NODE, &config_terminal_no_length_cmd);
+		install_element(ENABLE_NODE, &echo_cmd);
+
+		install_default(CONFIG_NODE);
+	}
+
+	install_element(CONFIG_NODE, &hostname_cmd);
+	install_element(CONFIG_NODE, &no_hostname_cmd);
+
+	if (terminal) {
+		install_element(CONFIG_NODE, &password_cmd);
+		install_element(CONFIG_NODE, &password_text_cmd);
+		install_element(CONFIG_NODE, &enable_password_cmd);
+		install_element(CONFIG_NODE, &enable_password_text_cmd);
+		install_element(CONFIG_NODE, &no_enable_password_cmd);
+
+		install_element(CONFIG_NODE, &service_password_encrypt_cmd);
+		install_element(CONFIG_NODE, &no_service_password_encrypt_cmd);
+		install_element(CONFIG_NODE, &banner_motd_default_cmd);
+		install_element(CONFIG_NODE, &banner_motd_file_cmd);
+		install_element(CONFIG_NODE, &no_banner_motd_cmd);
+		install_element(CONFIG_NODE, &service_terminal_length_cmd);
+		install_element(CONFIG_NODE, &no_service_terminal_length_cmd);
+
+	}
+	srand(time(NULL));
+}