taclib_private.h revision 41120 
1/*-
2 * Copyright 1998 Juniper Networks, Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 *	$FreeBSD: cvs2svn/branches/JUNIPER/lib/libtacplus/taclib_private.h 41120 1998-11-13 00:54:26Z jdp $
27 */
28
29#ifndef TACLIB_PRIVATE_H
30#define TACLIB_PRIVATE_H
31
32#include "taclib.h"
33
34/* Defaults */
35#define PATH_TACPLUS_CONF	"/etc/tacplus.conf"
36#define TACPLUS_PORT		49
37#define TIMEOUT			3	/* In seconds */
38
39/* Limits */
40#define BODYSIZE	8150		/* Maximum message body size */
41#define ERRSIZE		128		/* Maximum error message length */
42#define MAXCONFLINE	1024		/* Maximum config file line length */
43#define MAXSERVERS	10		/* Maximum number of servers to try */
44
45/* Protocol constants. */
46#define HDRSIZE		12		/* Size of message header */
47
48/* Protocol version number */
49#define TAC_VER_MAJOR		0xc		/* Major version number */
50
51/* Protocol packet types */
52#define TAC_AUTHEN		0x01		/* Authentication */
53#define TAC_AUTHOR		0x02		/* Authorization */
54#define TAC_ACCT		0x03		/* Accouting */
55
56/* Protocol header flags */
57#define TAC_UNENCRYPTED		0x01
58#define TAC_SINGLE_CONNECT	0x04
59
60struct tac_server {
61	struct sockaddr_in addr;	/* Address of server */
62	char		*secret;	/* Shared secret */
63	int		 timeout;	/* Timeout in seconds */
64	int		 flags;
65};
66
67/*
68 * An optional string of bytes specified by the client for inclusion in
69 * a request.  The data is always a dynamically allocated copy that
70 * belongs to the library.  It is copied into the request packet just
71 * before sending the request.
72 */
73struct clnt_str {
74	void		*data;
75	size_t		 len;
76};
77
78/*
79 * An optional string of bytes from a server response.  The data resides
80 * in the response packet itself, and must not be freed.
81 */
82struct srvr_str {
83	const void	*data;
84	size_t		 len;
85};
86
87struct tac_authen_start {
88	u_int8_t	action;
89	u_int8_t	priv_lvl;
90	u_int8_t	authen_type;
91	u_int8_t	service;
92	u_int8_t	user_len;
93	u_int8_t	port_len;
94	u_int8_t	rem_addr_len;
95	u_int8_t	data_len;
96	unsigned char	rest[1];
97};
98
99struct tac_authen_reply {
100	u_int8_t	status;
101	u_int8_t	flags;
102	u_int16_t	msg_len;
103	u_int16_t	data_len;
104	unsigned char	rest[1];
105};
106
107struct tac_authen_cont {
108	u_int16_t	user_msg_len;
109	u_int16_t	data_len;
110	u_int8_t	flags;
111	unsigned char	rest[1];
112};
113
114struct tac_msg {
115	u_int8_t	version;
116	u_int8_t	type;
117	u_int8_t	seq_no;
118	u_int8_t	flags;
119	u_int8_t	session_id[4];
120	u_int32_t	length;
121	union {
122		struct tac_authen_start authen_start;
123		struct tac_authen_reply authen_reply;
124		struct tac_authen_cont authen_cont;
125		unsigned char body[BODYSIZE];
126	} u;
127};
128
129struct tac_handle {
130	int		 fd;		/* Socket file descriptor */
131	struct tac_server servers[MAXSERVERS];	/* Servers to contact */
132	int		 num_servers;	/* Number of valid server entries */
133	int		 cur_server;	/* Server we are currently using */
134	int		 single_connect;	/* Use a single connection */
135	int		 last_seq_no;
136	char		 errmsg[ERRSIZE];	/* Most recent error message */
137
138	struct clnt_str	 user;
139	struct clnt_str	 port;
140	struct clnt_str	 rem_addr;
141	struct clnt_str	 data;
142	struct clnt_str	 user_msg;
143
144	struct tac_msg	 request;
145	struct tac_msg	 response;
146
147	int		 srvr_pos;	/* Scan position in response body */
148	struct srvr_str	 srvr_msg;
149	struct srvr_str	 srvr_data;
150};
151
152#endif
153