1: /* Virtual terminal [aka TeletYpe] interface routine
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
17: along with GNU Zebra; see the file COPYING. If not, write to the Free
18: Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
19: 02111-1307, USA. */
20:
21: #ifndef _ZEBRA_VTY_H
22: #define _ZEBRA_VTY_H
23:
24: #include "thread.h"
25: #include "log.h"
26:
27: #define VTY_BUFSIZ 512
28: #define VTY_MAXHIST 20
29:
30: /* VTY struct. */
31: struct vty
32: {
33: /* File descripter of this vty. */
34: int fd;
35:
36: /* Is this vty connect to file or not */
37: enum {VTY_TERM, VTY_FILE, VTY_SHELL, VTY_SHELL_SERV} type;
38:
39: /* Node status of this vty */
40: int node;
41:
42: /* What address is this vty comming from. */
43: char *address;
44:
45: /* Failure count */
46: int fail;
47:
48: /* Output buffer. */
49: struct buffer *obuf;
50:
51: /* Command input buffer */
52: char *buf;
53:
54: /* Command cursor point */
55: int cp;
56:
57: /* Command length */
58: int length;
59:
60: /* Command max length. */
61: int max;
62:
63: /* Histry of command */
64: char *hist[VTY_MAXHIST];
65:
66: /* History lookup current point */
67: int hp;
68:
69: /* History insert end point */
70: int hindex;
71:
72: /* For current referencing point of interface, route-map,
73: access-list etc... */
74: void *index;
75:
76: /* For multiple level index treatment such as key chain and key. */
77: void *index_sub;
78:
79: /* For escape character. */
80: unsigned char escape;
81:
82: /* Current vty status. */
83: enum {VTY_NORMAL, VTY_CLOSE, VTY_MORE, VTY_MORELINE} status;
84:
85: /* IAC handling: was the last character received the
86: IAC (interpret-as-command) escape character (and therefore the next
87: character will be the command code)? Refer to Telnet RFC 854. */
88: unsigned char iac;
89:
90: /* IAC SB (option subnegotiation) handling */
91: unsigned char iac_sb_in_progress;
92: /* At the moment, we care only about the NAWS (window size) negotiation,
93: and that requires just a 5-character buffer (RFC 1073):
94: <NAWS char> <16-bit width> <16-bit height> */
95: #define TELNET_NAWS_SB_LEN 5
96: unsigned char sb_buf[TELNET_NAWS_SB_LEN];
97: /* How many subnegotiation characters have we received? We just drop
98: those that do not fit in the buffer. */
99: size_t sb_len;
100:
101: /* Window width/height. */
102: int width;
103: int height;
104:
105: /* Configure lines. */
106: int lines;
107:
108: /* Terminal monitor. */
109: int monitor;
110:
111: /* In configure mode. */
112: int config;
113:
114: /* Read and write thread. */
115: struct thread *t_read;
116: struct thread *t_write;
117:
118: /* Timeout seconds and thread. */
119: unsigned long v_timeout;
120: struct thread *t_timeout;
121: };
122:
123: /* Integrated configuration file. */
124: #define INTEGRATE_DEFAULT_CONFIG "Quagga.conf"
125:
126: /* Small macro to determine newline is newline only or linefeed needed. */
127: #define VTY_NEWLINE ((vty->type == VTY_TERM) ? "\r\n" : "\n")
128:
129: /* Default time out value */
130: #define VTY_TIMEOUT_DEFAULT 600
131:
132: /* Vty read buffer size. */
133: #define VTY_READ_BUFSIZ 512
134:
135: /* Directory separator. */
136: #ifndef DIRECTORY_SEP
137: #define DIRECTORY_SEP '/'
138: #endif /* DIRECTORY_SEP */
139:
140: #ifndef IS_DIRECTORY_SEP
141: #define IS_DIRECTORY_SEP(c) ((c) == DIRECTORY_SEP)
142: #endif
143:
144: /* GCC have printf type attribute check. */
145: #ifdef __GNUC__
146: #define PRINTF_ATTRIBUTE(a,b) __attribute__ ((__format__ (__printf__, a, b)))
147: #else
148: #define PRINTF_ATTRIBUTE(a,b)
149: #endif /* __GNUC__ */
150:
151: /* Utility macros to convert VTY argument to unsigned long or integer. */
152: #define VTY_GET_LONG(NAME,V,STR) \
153: do { \
154: char *endptr = NULL; \
155: errno = 0; \
156: (V) = strtoul ((STR), &endptr, 10); \
157: if (*(STR) == '-' || *endptr != '\0' || errno) \
158: { \
159: vty_out (vty, "%% Invalid %s value%s", NAME, VTY_NEWLINE); \
160: return CMD_WARNING; \
161: } \
162: } while (0)
163:
164: #define VTY_GET_INTEGER_RANGE(NAME,V,STR,MIN,MAX) \
165: do { \
166: unsigned long tmpl; \
167: VTY_GET_LONG(NAME, tmpl, STR); \
168: if ( (tmpl < (MIN)) || (tmpl > (MAX))) \
169: { \
170: vty_out (vty, "%% Invalid %s value%s", NAME, VTY_NEWLINE); \
171: return CMD_WARNING; \
172: } \
173: (V) = tmpl; \
174: } while (0)
175:
176: #define VTY_GET_INTEGER(NAME,V,STR) \
177: VTY_GET_INTEGER_RANGE(NAME,V,STR,0U,UINT32_MAX)
178:
179: #define VTY_GET_IPV4_ADDRESS(NAME,V,STR) \
180: do { \
181: int retv; \
182: retv = inet_aton ((STR), &(V)); \
183: if (!retv) \
184: { \
185: vty_out (vty, "%% Invalid %s value%s", NAME, VTY_NEWLINE); \
186: return CMD_WARNING; \
187: } \
188: } while (0)
189:
190: #define VTY_GET_IPV4_PREFIX(NAME,V,STR) \
191: do { \
192: int retv; \
193: retv = str2prefix_ipv4 ((STR), &(V)); \
194: if (retv <= 0) \
195: { \
196: vty_out (vty, "%% Invalid %s value%s", NAME, VTY_NEWLINE); \
197: return CMD_WARNING; \
198: } \
199: } while (0)
200:
201: /* Exported variables */
202: extern char integrate_default[];
203:
204: /* Prototypes. */
205: extern void vty_init (struct thread_master *);
206: extern void vty_init_vtysh (void);
207: extern void vty_terminate (void);
208: extern void vty_reset (void);
209: extern struct vty *vty_new (void);
210: extern int vty_out (struct vty *, const char *, ...) PRINTF_ATTRIBUTE(2, 3);
211: extern void vty_read_config (char *, char *);
212: extern void vty_time_print (struct vty *, int);
213: extern void vty_serv_sock (const char *, unsigned short, const char *);
214: extern void vty_close (struct vty *);
215: extern char *vty_get_cwd (void);
216: extern void vty_log (const char *level, const char *proto,
217: const char *fmt, struct timestamp_control *, va_list);
218: extern int vty_config_lock (struct vty *);
219: extern int vty_config_unlock (struct vty *);
220: extern int vty_shell (struct vty *);
221: extern int vty_shell_serv (struct vty *);
222: extern void vty_hello (struct vty *);
223:
224: /* Send a fixed-size message to all vty terminal monitors; this should be
225: an async-signal-safe function. */
226: extern void vty_log_fixed (const char *buf, size_t len);
227:
228: #endif /* _ZEBRA_VTY_H */
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