[mirror_frr.git] / lib / vty.h

/* Virtual terminal [aka TeletYpe] interface routine
 * Copyright (C) 1997 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 this program; see the file COPYING; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */

#ifndef _ZEBRA_VTY_H
#define _ZEBRA_VTY_H

#include <sys/types.h>
#ifdef HAVE_LIBPCREPOSIX
#include <pcreposix.h>
#else
#include <regex.h>
#endif /* HAVE_LIBPCREPOSIX */

#include "thread.h"
#include "log.h"
#include "sockunion.h"
#include "qobj.h"
#include "compiler.h"
#include "northbound.h"

#ifdef __cplusplus
extern "C" {
#endif

#define VTY_BUFSIZ 4096
#define VTY_MAXHIST 20
#define VTY_MAXDEPTH 8

#define VTY_MAXCFGCHANGES 16

struct vty_error {
	char error_buf[VTY_BUFSIZ];
	uint32_t line_num;
};

struct vty_cfg_change {
	char xpath[XPATH_MAXLEN];
	enum nb_operation operation;
	const char *value;
};

/* VTY struct. */
struct vty {
	/* File descripter of this vty. */
	int fd;

	/* output FD, to support stdin/stdout combination */
	int wfd;

	/* File output, used for VTYSH only */
	FILE *of;
	FILE *of_saved;

	/* whether we are using pager or not */
	bool is_paged;

	/* Is this vty connect to file or not */
	enum { VTY_TERM, VTY_FILE, VTY_SHELL, VTY_SHELL_SERV } type;

	/* Node status of this vty */
	int node;

	/* Failure count */
	int fail;

	/* Output filer regex */
	bool filter;
	regex_t include;

	/* Line buffer */
	struct buffer *lbuf;

	/* Output buffer. */
	struct buffer *obuf;

	/* Command input buffer */
	char *buf;

	/* Command input error buffer */
	struct list *error;

	/* Command cursor point */
	int cp;

	/* Command length */
	int length;

	/* Command max length. */
	int max;

	/* Histry of command */
	char *hist[VTY_MAXHIST];

	/* History lookup current point */
	int hp;

	/* History insert end point */
	int hindex;

	/* Changes enqueued to be applied in the candidate configuration. */
	size_t num_cfg_changes;
	struct vty_cfg_change cfg_changes[VTY_MAXCFGCHANGES];

	/* XPath of the current node */
	int xpath_index;
	char xpath[VTY_MAXDEPTH][XPATH_MAXLEN];

	/* In configure mode. */
	bool config;

	/* Private candidate configuration mode. */
	bool private_config;

	/* Candidate configuration. */
	struct nb_config *candidate_config;

	/* Base candidate configuration. */
	struct nb_config *candidate_config_base;

	/* Confirmed-commit timeout and rollback configuration. */
	struct thread *t_confirmed_commit_timeout;
	struct nb_config *confirmed_commit_rollback;

	/* qobj object ID (replacement for "index") */
	uint64_t qobj_index;

	/* qobj second-level object ID (replacement for "index_sub") */
	uint64_t qobj_index_sub;

	/* For escape character. */
	unsigned char escape;

	/* Current vty status. */
	enum { VTY_NORMAL, VTY_CLOSE, VTY_MORE, VTY_MORELINE } status;

	/* IAC handling: was the last character received the
	   IAC (interpret-as-command) escape character (and therefore the next
	   character will be the command code)?  Refer to Telnet RFC 854. */
	unsigned char iac;

	/* IAC SB (option subnegotiation) handling */
	unsigned char iac_sb_in_progress;
/* At the moment, we care only about the NAWS (window size) negotiation,
   and that requires just a 5-character buffer (RFC 1073):
     <NAWS char> <16-bit width> <16-bit height> */
#define TELNET_NAWS_SB_LEN 5
	unsigned char sb_buf[TELNET_NAWS_SB_LEN];
	/* How many subnegotiation characters have we received?  We just drop
	   those that do not fit in the buffer. */
	size_t sb_len;

	/* Window width/height. */
	int width;
	int height;

	/* Configure lines. */
	int lines;

	/* Terminal monitor. */
	int monitor;

	/* Read and write thread. */
	struct thread *t_read;
	struct thread *t_write;

	/* Timeout seconds and thread. */
	unsigned long v_timeout;
	struct thread *t_timeout;

	/* What address is this vty comming from. */
	char address[SU_ADDRSTRLEN];

	/* "frame" output.  This is buffered and will be printed if some
	 * actual output follows, or will be discarded if the frame ends
	 * without any output. */
	size_t frame_pos;
	char frame[1024];
};

static inline void vty_push_context(struct vty *vty, int node, uint64_t id)
{
	vty->node = node;
	vty->qobj_index = id;
}

/* note: VTY_PUSH_CONTEXT(..., NULL) doesn't work, since it will try to
 * dereference "NULL->qobj_node.nid" */
#define VTY_PUSH_CONTEXT(nodeval, ptr)                                         \
	vty_push_context(vty, nodeval, QOBJ_ID_0SAFE(ptr))
#define VTY_PUSH_CONTEXT_NULL(nodeval) vty_push_context(vty, nodeval, 0ULL)
#define VTY_PUSH_CONTEXT_SUB(nodeval, ptr)                                     \
	do {                                                                   \
		vty->node = nodeval;                                           \
		/* qobj_index stays untouched */                               \
		vty->qobj_index_sub = QOBJ_ID_0SAFE(ptr);                      \
	} while (0)

/* can return NULL if context is invalid! */
#define VTY_GET_CONTEXT(structname)                                            \
	QOBJ_GET_TYPESAFE(vty->qobj_index, structname)
#define VTY_GET_CONTEXT_SUB(structname)                                        \
	QOBJ_GET_TYPESAFE(vty->qobj_index_sub, structname)

/* will return if ptr is NULL. */
#define VTY_CHECK_CONTEXT(ptr)                                                 \
	if (!ptr) {                                                            \
		vty_out(vty,                                                   \
			"Current configuration object was deleted "            \
			"by another process.\n");                              \
		return CMD_WARNING;                                            \
	}

/* struct structname *ptr = <context>;   ptr will never be NULL. */
#define VTY_DECLVAR_CONTEXT(structname, ptr)                                   \
	struct structname *ptr = VTY_GET_CONTEXT(structname);                  \
	VTY_CHECK_CONTEXT(ptr);
#define VTY_DECLVAR_CONTEXT_SUB(structname, ptr)                               \
	struct structname *ptr = VTY_GET_CONTEXT_SUB(structname);              \
	VTY_CHECK_CONTEXT(ptr);
#define VTY_DECLVAR_INSTANCE_CONTEXT(structname, ptr)                          \
	if (vty->qobj_index == 0)                                              \
		return CMD_NOT_MY_INSTANCE;                                    \
	struct structname *ptr = VTY_GET_CONTEXT(structname);                  \
	VTY_CHECK_CONTEXT(ptr);

/* XPath macros. */
#define VTY_PUSH_XPATH(nodeval, value)                                         \
	do {                                                                   \
		if (vty->xpath_index >= VTY_MAXDEPTH) {                        \
			vty_out(vty, "%% Reached maximum CLI depth (%u)\n",    \
				VTY_MAXDEPTH);                                 \
			return CMD_WARNING;                                    \
		}                                                              \
		vty->node = nodeval;                                           \
		strlcpy(vty->xpath[vty->xpath_index], value,                   \
			sizeof(vty->xpath[0]));                                \
		vty->xpath_index++;                                            \
	} while (0)

#define VTY_CURR_XPATH vty->xpath[vty->xpath_index - 1]

#define VTY_CHECK_XPATH                                                        \
	do {                                                                   \
		if (vty->type != VTY_FILE && !vty->private_config              \
		    && vty->xpath_index > 0                                    \
		    && !yang_dnode_exists(vty->candidate_config->dnode,        \
					  VTY_CURR_XPATH)) {                   \
			vty_out(vty,                                           \
				"Current configuration object was deleted "    \
				"by another process.\n\n");                    \
			return CMD_WARNING;                                    \
		}                                                              \
	} while (0)

struct vty_arg {
	const char *name;
	const char *value;
	const char **argv;
	int argc;
};

/* Integrated configuration file. */
#define INTEGRATE_DEFAULT_CONFIG "frr.conf"

/* Default time out value */
#define VTY_TIMEOUT_DEFAULT 600

/* Vty read buffer size. */
#define VTY_READ_BUFSIZ 512

/* Directory separator. */
#ifndef DIRECTORY_SEP
#define DIRECTORY_SEP '/'
#endif /* DIRECTORY_SEP */

#ifndef IS_DIRECTORY_SEP
#define IS_DIRECTORY_SEP(c) ((c) == DIRECTORY_SEP)
#endif

/* Prototypes. */
extern void vty_init(struct thread_master *, bool do_command_logging);
extern void vty_init_vtysh(void);
extern void vty_terminate(void);
extern void vty_reset(void);
extern struct vty *vty_new(void);
extern struct vty *vty_stdio(void (*atclose)(int isexit));

/* - vty_frame() output goes to a buffer (for context-begin markers)
 * - vty_out() will first print this buffer, and clear it
 * - vty_endframe() clears the buffer without printing it, and prints an
 *   extra string if the buffer was empty before (for context-end markers)
 */
extern int vty_out(struct vty *, const char *, ...) PRINTFRR(2, 3);
extern void vty_frame(struct vty *, const char *, ...) PRINTFRR(2, 3);
extern void vty_endframe(struct vty *, const char *);
bool vty_set_include(struct vty *vty, const char *regexp);

extern bool vty_read_config(struct nb_config *config, const char *config_file,
			    char *config_default_dir);
extern void vty_time_print(struct vty *, int);
extern void vty_serv_sock(const char *, unsigned short, const char *);
extern void vty_close(struct vty *);
extern char *vty_get_cwd(void);
extern void vty_log(const char *level, const char *proto, const char *msg,
		    struct timestamp_control *);
extern int vty_config_enter(struct vty *vty, bool private_config,
			    bool exclusive);
extern void vty_config_exit(struct vty *);
extern int vty_config_node_exit(struct vty *);
extern int vty_shell(struct vty *);
extern int vty_shell_serv(struct vty *);
extern void vty_hello(struct vty *);

/* ^Z / SIGTSTP handling */
extern void vty_stdio_suspend(void);
extern void vty_stdio_resume(void);
extern void vty_stdio_close(void);

/* Send a fixed-size message to all vty terminal monitors; this should be
   an async-signal-safe function. */
extern void vty_log_fixed(char *buf, size_t len);

#ifdef __cplusplus
}
#endif

#endif /* _ZEBRA_VTY_H */
Commit	Line	Data
718e3744	1	/* Virtual terminal [aka TeletYpe] interface routine
896014f4 DL	2	* Copyright (C) 1997 Kunihiro Ishiguro
	3	*
	4	* This file is part of GNU Zebra.
	5	*
	6	* GNU Zebra is free software; you can redistribute it and/or modify it
	7	* under the terms of the GNU General Public License as published by the
	8	* Free Software Foundation; either version 2, or (at your option) any
	9	* later version.
	10	*
	11	* GNU Zebra is distributed in the hope that it will be useful, but
	12	* WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	* General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License along
	17	* with this program; see the file COPYING; if not, write to the Free Software
	18	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	19	*/
718e3744	20
	21	#ifndef _ZEBRA_VTY_H
	22	#define _ZEBRA_VTY_H
	23
fe6b47b9	24	#include <sys/types.h>
beee9b4a DS	25	#ifdef HAVE_LIBPCREPOSIX
	26	#include <pcreposix.h>
	27	#else
fe6b47b9	28	#include <regex.h>
beee9b4a	29	#endif /* HAVE_LIBPCREPOSIX */
fe6b47b9	30
b21b19c5	31	#include "thread.h"
1ed72e0b	32	#include "log.h"
d227617a	33	#include "sockunion.h"
0878c8d4	34	#include "qobj.h"
de1a880c	35	#include "compiler.h"
1c2facd1	36	#include "northbound.h"
b21b19c5	37
5e244469 RW	38	#ifdef __cplusplus
	39	extern "C" {
	40	#endif
	41
2af38873	42	#define VTY_BUFSIZ 4096
718e3744	43	#define VTY_MAXHIST 20
1c2facd1	44	#define VTY_MAXDEPTH 8
718e3744	45
0b3eed38	46	#define VTY_MAXCFGCHANGES 16
a6233bfc	47
7ab57d19 DS	48	struct vty_error {
	49	char error_buf[VTY_BUFSIZ];
	50	uint32_t line_num;
	51	};
	52
a6233bfc	53	struct vty_cfg_change {
8427e0e6	54	char xpath[XPATH_MAXLEN];
a6233bfc RW	55	enum nb_operation operation;
	56	const char *value;
	57	};
	58
718e3744	59	/* VTY struct. */
d62a17ae	60	struct vty {
	61	/* File descripter of this vty. */
	62	int fd;
718e3744	63
d62a17ae	64	/* output FD, to support stdin/stdout combination */
d62a17ae	65	int wfd;
c5e69a02	66
2cddf2ff QY	67	/* File output, used for VTYSH only */
	68	FILE *of;
	69	FILE *of_saved;
	70
	71	/* whether we are using pager or not */
	72	bool is_paged;
	73
d62a17ae	74	/* Is this vty connect to file or not */
d62a17ae	75	enum { VTY_TERM, VTY_FILE, VTY_SHELL, VTY_SHELL_SERV } type;
718e3744	76
d62a17ae	77	/* Node status of this vty */
d62a17ae	78	int node;
718e3744	79
d62a17ae	80	/* Failure count */
d62a17ae	81	int fail;
718e3744	82
fe6b47b9 QY	83	/* Output filer regex */
	84	bool filter;
	85	regex_t include;
	86
0b42d81a QY	87	/* Line buffer */
	88	struct buffer *lbuf;
	89
d62a17ae	90	/* Output buffer. */
d62a17ae	91	struct buffer *obuf;
718e3744	92
d62a17ae	93	/* Command input buffer */
d62a17ae	94	char *buf;
718e3744	95
d62a17ae	96	/* Command input error buffer */
7ab57d19	97	struct list *error;
5689fe5f	98
d62a17ae	99	/* Command cursor point */
d62a17ae	100	int cp;
718e3744	101
d62a17ae	102	/* Command length */
d62a17ae	103	int length;
718e3744	104
d62a17ae	105	/* Command max length. */
d62a17ae	106	int max;
718e3744	107
d62a17ae	108	/* Histry of command */
d62a17ae	109	char *hist[VTY_MAXHIST];
718e3744	110
d62a17ae	111	/* History lookup current point */
d62a17ae	112	int hp;
718e3744	113
d62a17ae	114	/* History insert end point */
d62a17ae	115	int hindex;
718e3744	116
a6233bfc RW	117	/* Changes enqueued to be applied in the candidate configuration. */
	118	size_t num_cfg_changes;
	119	struct vty_cfg_change cfg_changes[VTY_MAXCFGCHANGES];
	120
1c2facd1 RW	121	/* XPath of the current node */
	122	int xpath_index;
	123	char xpath[VTY_MAXDEPTH][XPATH_MAXLEN];
	124
f344c66e RW	125	/* In configure mode. */
	126	bool config;
	127
1c2facd1 RW	128	/* Private candidate configuration mode. */
	129	bool private_config;
	130
	131	/* Candidate configuration. */
	132	struct nb_config *candidate_config;
	133
	134	/* Base candidate configuration. */
	135	struct nb_config *candidate_config_base;
	136
fbdc1c0a RW	137	/* Confirmed-commit timeout and rollback configuration. */
	138	struct thread *t_confirmed_commit_timeout;
	139	struct nb_config *confirmed_commit_rollback;
	140
d62a17ae	141	/* qobj object ID (replacement for "index") */
d62a17ae	142	uint64_t qobj_index;
718e3744	143
d62a17ae	144	/* qobj second-level object ID (replacement for "index_sub") */
d62a17ae	145	uint64_t qobj_index_sub;
718e3744	146
d62a17ae	147	/* For escape character. */
d62a17ae	148	unsigned char escape;
718e3744	149
d62a17ae	150	/* Current vty status. */
d62a17ae	151	enum { VTY_NORMAL, VTY_CLOSE, VTY_MORE, VTY_MORELINE } status;
718e3744	152
d62a17ae	153	/* IAC handling: was the last character received the
	154	IAC (interpret-as-command) escape character (and therefore the next
	155	character will be the command code)? Refer to Telnet RFC 854. */
	156	unsigned char iac;
718e3744	157
d62a17ae	158	/* IAC SB (option subnegotiation) handling */
	159	unsigned char iac_sb_in_progress;
	160	/* At the moment, we care only about the NAWS (window size) negotiation,
	161	and that requires just a 5-character buffer (RFC 1073):
	162	<NAWS char> <16-bit width> <16-bit height> */
9fc7ebf1	163	#define TELNET_NAWS_SB_LEN 5
d62a17ae	164	unsigned char sb_buf[TELNET_NAWS_SB_LEN];
	165	/* How many subnegotiation characters have we received? We just drop
	166	those that do not fit in the buffer. */
	167	size_t sb_len;
718e3744	168
d62a17ae	169	/* Window width/height. */
	170	int width;
	171	int height;
718e3744	172
d62a17ae	173	/* Configure lines. */
d62a17ae	174	int lines;
718e3744	175
d62a17ae	176	/* Terminal monitor. */
d62a17ae	177	int monitor;
718e3744	178
d62a17ae	179	/* Read and write thread. */
	180	struct thread *t_read;
	181	struct thread *t_write;
718e3744	182
d62a17ae	183	/* Timeout seconds and thread. */
	184	unsigned long v_timeout;
	185	struct thread *t_timeout;
d227617a	186
d62a17ae	187	/* What address is this vty comming from. */
d62a17ae	188	char address[SU_ADDRSTRLEN];
2071aa0e DL	189
	190	/* "frame" output. This is buffered and will be printed if some
	191	* actual output follows, or will be discarded if the frame ends
	192	* without any output. */
	193	size_t frame_pos;
	194	char frame[1024];
718e3744	195	};
718e3744	196
d62a17ae	197	static inline void vty_push_context(struct vty *vty, int node, uint64_t id)
0878c8d4	198	{
d62a17ae	199	vty->node = node;
d62a17ae	200	vty->qobj_index = id;
0878c8d4 DL	201	}
0878c8d4 DL	202
3c5070be DL	203	/* note: VTY_PUSH_CONTEXT(..., NULL) doesn't work, since it will try to
3c5070be DL	204	* dereference "NULL->qobj_node.nid" */
d62a17ae	205	#define VTY_PUSH_CONTEXT(nodeval, ptr) \
a50b7ceb	206	vty_push_context(vty, nodeval, QOBJ_ID_0SAFE(ptr))
d62a17ae	207	#define VTY_PUSH_CONTEXT_NULL(nodeval) vty_push_context(vty, nodeval, 0ULL)
	208	#define VTY_PUSH_CONTEXT_SUB(nodeval, ptr) \
	209	do { \
	210	vty->node = nodeval; \
	211	/* qobj_index stays untouched */ \
	212	vty->qobj_index_sub = QOBJ_ID_0SAFE(ptr); \
6a098b3a	213	} while (0)
0878c8d4 DL	214
0878c8d4 DL	215	/* can return NULL if context is invalid! */
d62a17ae	216	#define VTY_GET_CONTEXT(structname) \
0878c8d4	217	QOBJ_GET_TYPESAFE(vty->qobj_index, structname)
d62a17ae	218	#define VTY_GET_CONTEXT_SUB(structname) \
6a098b3a	219	QOBJ_GET_TYPESAFE(vty->qobj_index_sub, structname)
0878c8d4 DL	220
0878c8d4 DL	221	/* will return if ptr is NULL. */
d62a17ae	222	#define VTY_CHECK_CONTEXT(ptr) \
	223	if (!ptr) { \
	224	vty_out(vty, \
	225	"Current configuration object was deleted " \
	226	"by another process.\n"); \
	227	return CMD_WARNING; \
0878c8d4 DL	228	}
	229
	230	/* struct structname ptr = <context>; ptr will never be NULL. /
d62a17ae	231	#define VTY_DECLVAR_CONTEXT(structname, ptr) \
d62a17ae	232	struct structname *ptr = VTY_GET_CONTEXT(structname); \
0878c8d4	233	VTY_CHECK_CONTEXT(ptr);
d62a17ae	234	#define VTY_DECLVAR_CONTEXT_SUB(structname, ptr) \
d62a17ae	235	struct structname *ptr = VTY_GET_CONTEXT_SUB(structname); \
6a098b3a	236	VTY_CHECK_CONTEXT(ptr);
a3d826f0	237	#define VTY_DECLVAR_INSTANCE_CONTEXT(structname, ptr) \
996c9314 LB	238	if (vty->qobj_index == 0) \
996c9314 LB	239	return CMD_NOT_MY_INSTANCE; \
a3d826f0 CS	240	struct structname *ptr = VTY_GET_CONTEXT(structname); \
a3d826f0 CS	241	VTY_CHECK_CONTEXT(ptr);
0878c8d4	242
1c2facd1 RW	243	/* XPath macros. */
	244	#define VTY_PUSH_XPATH(nodeval, value) \
	245	do { \
	246	if (vty->xpath_index >= VTY_MAXDEPTH) { \
	247	vty_out(vty, "%% Reached maximum CLI depth (%u)\n", \
	248	VTY_MAXDEPTH); \
	249	return CMD_WARNING; \
	250	} \
	251	vty->node = nodeval; \
	252	strlcpy(vty->xpath[vty->xpath_index], value, \
	253	sizeof(vty->xpath[0])); \
	254	vty->xpath_index++; \
	255	} while (0)
	256
	257	#define VTY_CURR_XPATH vty->xpath[vty->xpath_index - 1]
	258
	259	#define VTY_CHECK_XPATH \
	260	do { \
caaa8b9c RW	261	if (vty->type != VTY_FILE && !vty->private_config \
caaa8b9c RW	262	&& vty->xpath_index > 0 \
1c2facd1 RW	263	&& !yang_dnode_exists(vty->candidate_config->dnode, \
	264	VTY_CURR_XPATH)) { \
	265	vty_out(vty, \
	266	"Current configuration object was deleted " \
	267	"by another process.\n\n"); \
	268	return CMD_WARNING; \
	269	} \
	270	} while (0)
	271
d62a17ae	272	struct vty_arg {
	273	const char *name;
	274	const char *value;
	275	const char **argv;
	276	int argc;
eac6e3f0 RW	277	};
eac6e3f0 RW	278
718e3744	279	/* Integrated configuration file. */
e20dc2ba	280	#define INTEGRATE_DEFAULT_CONFIG "frr.conf"
718e3744	281
718e3744	282	/* Default time out value */
	283	#define VTY_TIMEOUT_DEFAULT 600
	284
	285	/* Vty read buffer size. */
	286	#define VTY_READ_BUFSIZ 512
	287
	288	/* Directory separator. */
	289	#ifndef DIRECTORY_SEP
	290	#define DIRECTORY_SEP '/'
	291	#endif /* DIRECTORY_SEP */
	292
	293	#ifndef IS_DIRECTORY_SEP
	294	#define IS_DIRECTORY_SEP(c) ((c) == DIRECTORY_SEP)
	295	#endif
	296
718e3744	297	/* Prototypes. */
2950f5da	298	extern void vty_init(struct thread_master *, bool do_command_logging);
d62a17ae	299	extern void vty_init_vtysh(void);
	300	extern void vty_terminate(void);
	301	extern void vty_reset(void);
	302	extern struct vty *vty_new(void);
154b9e8f	303	extern struct vty vty_stdio(void (atclose)(int isexit));
2071aa0e DL	304
	305	/* - vty_frame() output goes to a buffer (for context-begin markers)
	306	* - vty_out() will first print this buffer, and clear it
	307	* - vty_endframe() clears the buffer without printing it, and prints an
	308	* extra string if the buffer was empty before (for context-end markers)
	309	*/
afb35622 DL	310	extern int vty_out(struct vty , const char , ...) PRINTFRR(2, 3);
afb35622 DL	311	extern void vty_frame(struct vty , const char , ...) PRINTFRR(2, 3);
2071aa0e	312	extern void vty_endframe(struct vty , const char );
fe6b47b9	313	bool vty_set_include(struct vty vty, const char regexp);
2071aa0e	314
1c2facd1 RW	315	extern bool vty_read_config(struct nb_config config, const char config_file,
1c2facd1 RW	316	char *config_default_dir);
d62a17ae	317	extern void vty_time_print(struct vty *, int);
	318	extern void vty_serv_sock(const char , unsigned short, const char );
	319	extern void vty_close(struct vty *);
	320	extern char *vty_get_cwd(void);
807f5b98 DL	321	extern void vty_log(const char level, const char proto, const char *msg,
807f5b98 DL	322	struct timestamp_control *);
f344c66e RW	323	extern int vty_config_enter(struct vty *vty, bool private_config,
	324	bool exclusive);
	325	extern void vty_config_exit(struct vty *);
791ded4a	326	extern int vty_config_node_exit(struct vty *);
d62a17ae	327	extern int vty_shell(struct vty *);
	328	extern int vty_shell_serv(struct vty *);
	329	extern void vty_hello(struct vty *);
718e3744	330
154b9e8f DL	331	/* ^Z / SIGTSTP handling */
	332	extern void vty_stdio_suspend(void);
	333	extern void vty_stdio_resume(void);
	334	extern void vty_stdio_close(void);
	335
274a4a44	336	/* Send a fixed-size message to all vty terminal monitors; this should be
274a4a44	337	an async-signal-safe function. */
d62a17ae	338	extern void vty_log_fixed(char *buf, size_t len);
274a4a44	339
5e244469 RW	340	#ifdef __cplusplus
	341	}
	342	#endif
	343
718e3744	344	#endif /* _ZEBRA_VTY_H */