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1 /*
2  * session.c - PPP session control.
3  *
4  * Copyright (c) 2007 Diego Rivera. All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  *
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  *
13  * 2. The name(s) of the authors of this software must not be used to
14  *    endorse or promote products derived from this software without
15  *    prior written permission.
16  *
17  * 3. Redistributions of any form whatsoever must retain the following
18  *    acknowledgment:
19  *    "This product includes software developed by Paul Mackerras
20  *     <paulus@samba.org>".
21  *
22  * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
23  * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
24  * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
25  * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
26  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
27  * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
28  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
29  */
30 
31 #ifndef __SESSION_H
32 #define __SESSION_H
33 
34 #define SESS_AUTH  1	/* Check User Authentication */
35 #define SESS_ACCT  2	/* Check Account Validity */
36 
37 /* Convenience parameter to do the whole enchilada */
38 #define SESS_ALL   (SESS_AUTH | SESS_ACCT)
39 
40 /*
41  * int session_start(...)
42  *
43  * Start a session, performing any necessary validations.
44  *
45  * Parameters:
46  * 	const int flags :
47  * 		Any combination of the SESS_XXX flags, to indicate what the function
48  *		should do as part of its checks
49  *
50  *	const char* user :
51  *		The username to validate.  May safely be null.
52  *
53  *	const char* passwd :
54  *		The password to validate the user with. May safely be null.
55  *
56  *	const char* tty :
57  *		The TTY the user is connected on. May safely be null.
58  *
59  *	char** msg :
60  *		A char* to return an error or success message.  This message will be returned
61  *		regardless of the result.  May safely be null.
62  *
63  * Return Value:
64  * 	Zero value for failure, non-zero value for successful session verification.
65  */
66 int
67 session_start(const int flags, const char* user, const char* passwd, const char* tty, char** msg);
68 
69 /* Added these macros for convenience... */
70 #define session_auth(user, pass, tty, msg) \
71 	session_start(SESS_AUTH, user, pass, tty, msg)
72 
73 #define session_check(user, pass, tty, msg) \
74 	session_start(SESS_ACCT, user, pass, tty, msg)
75 
76 #define session_full(user, pass, tty, msg) \
77 	session_start(SESS_ALL, user, pass, tty, msg)
78 
79 /*
80  * void session_end(...)
81  *
82  * End a previously-started session.
83  *
84  * Parameters:
85  *	const char* tty :
86  *		The TTY the user is connected on. May safely be null.
87  */
88 void
89 session_end(const char* tty);
90 
91 #endif
92