1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
|
/* 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 "thread.h"
#include "log.h"
#include "sockunion.h"
#include "qobj.h"
#define VTY_BUFSIZ 4096
#define VTY_MAXHIST 20
/* VTY struct. */
struct vty
{
/* File descripter of this vty. */
int fd;
/* output FD, to support stdin/stdout combination */
int wfd;
/* 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 buffer. */
struct buffer *obuf;
/* Command input buffer */
char *buf;
/* Command input error buffer */
char *error_buf;
/* 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;
/* 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;
/* In configure mode. */
int config;
/* 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];
};
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.%s", VTYNL); \
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);
struct vty_arg
{
const char *name;
const char *value;
const char **argv;
int argc;
};
/* Integrated configuration file. */
#define INTEGRATE_DEFAULT_CONFIG "frr.conf"
/* Small macro to determine newline is newline only or linefeed needed. */
#define VTYNL ((vty->type == VTY_TERM) ? "\r\n" : "\n")
/* 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
/* GCC have printf type attribute check. */
#ifdef __GNUC__
#define PRINTF_ATTRIBUTE(a,b) __attribute__ ((__format__ (__printf__, a, b)))
#else
#define PRINTF_ATTRIBUTE(a,b)
#endif /* __GNUC__ */
/* Exported variables */
extern char integrate_default[];
/* Prototypes. */
extern void vty_init (struct thread_master *);
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)(void));
extern int vty_out (struct vty *, const char *, ...) PRINTF_ATTRIBUTE(2, 3);
extern int vty_outln (struct vty *, const char *, ...) PRINTF_ATTRIBUTE(2, 3);
extern void vty_read_config (const char *, char *);
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 *fmt, struct timestamp_control *, va_list);
extern int vty_config_lock (struct vty *);
extern int vty_config_unlock (struct vty *);
extern void vty_config_lockless (void);
extern int vty_shell (struct vty *);
extern int vty_shell_serv (struct vty *);
extern void vty_hello (struct vty *);
/* 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);
#endif /* _ZEBRA_VTY_H */
|
