xref: /illumos-gate/usr/src/lib/libwrap/update.c (revision 7c478bd9)
1 /*
2  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
3  * Use is subject to license terms.
4  */
5 
6 #pragma ident	"%Z%%M%	%I%	%E% SMI"
7 
8  /*
9   * Routines for controlled update/initialization of request structures.
10   *
11   * request_init() initializes its argument. Pointers and string-valued members
12   * are initialized to zero, to indicate that no lookup has been attempted.
13   *
14   * request_set() adds information to an already initialized request structure.
15   *
16   * Both functions take a variable-length name-value list.
17   *
18   * Diagnostics are reported through syslog(3).
19   *
20   * Author: Wietse Venema, Eindhoven University of Technology, The Netherlands.
21   */
22 
23 #ifndef lint
24 static char sccsid[] = "@(#) update.c 1.1 94/12/28 17:42:56";
25 #endif
26 
27 /* System libraries */
28 
29 #include <stdio.h>
30 #include <stdlib.h>
31 #include <unistd.h>
32 #include <syslog.h>
33 #include <string.h>
34 
35 /* Local stuff. */
36 
37 #include "mystdarg.h"
38 #include "tcpd.h"
39 
40 /* request_fill - request update engine */
41 
request_fill(request,ap)42 static struct request_info *request_fill(request, ap)
43 struct request_info *request;
44 va_list ap;
45 {
46     int     key;
47     char   *ptr;
48 
49     while ((key = va_arg(ap, int)) > 0) {
50 	switch (key) {
51 	default:
52 	    tcpd_warn("request_fill: invalid key: %d", key);
53 	    return (request);
54 	case RQ_FILE:
55 	    request->fd = va_arg(ap, int);
56 	    continue;
57 	case RQ_CLIENT_SIN:
58 	    request->client->sin = va_arg(ap, struct sockaddr_gen *);
59 	    continue;
60 	case RQ_SERVER_SIN:
61 	    request->server->sin = va_arg(ap, struct sockaddr_gen *);
62 	    continue;
63 
64 	    /*
65 	     * All other fields are strings with the same maximal length.
66 	     */
67 
68 	case RQ_DAEMON:
69 	    ptr = request->daemon;
70 	    break;
71 	case RQ_USER:
72 	    ptr = request->user;
73 	    break;
74 	case RQ_CLIENT_NAME:
75 	    ptr = request->client->name;
76 	    break;
77 	case RQ_CLIENT_ADDR:
78 	    ptr = request->client->addr;
79 	    break;
80 	case RQ_SERVER_NAME:
81 	    ptr = request->server->name;
82 	    break;
83 	case RQ_SERVER_ADDR:
84 	    ptr = request->server->addr;
85 	    break;
86 	}
87 	STRN_CPY(ptr, va_arg(ap, char *), STRING_LENGTH);
88     }
89     return (request);
90 }
91 
92 /* request_init - initialize request structure */
93 
VARARGS(request_init,struct request_info *,request)94 struct request_info *VARARGS(request_init, struct request_info *, request)
95 {
96     static struct request_info default_info;
97     struct request_info *r;
98     va_list ap;
99 
100     /*
101      * Initialize data members. We do not assign default function pointer
102      * members, to avoid pulling in the whole socket module when it is not
103      * really needed.
104      */
105     VASTART(ap, struct request_info *, request);
106     *request = default_info;
107     request->fd = -1;
108     strcpy(request->daemon, unknown);
109     sprintf(request->pid, "%d", getpid());
110     request->client->request = request;
111     request->server->request = request;
112     r = request_fill(request, ap);
113     VAEND(ap);
114     return (r);
115 }
116 
117 /* request_set - update request structure */
118 
VARARGS(request_set,struct request_info *,request)119 struct request_info *VARARGS(request_set, struct request_info *, request)
120 {
121     struct request_info *r;
122     va_list ap;
123 
124     VASTART(ap, struct request_info *, request);
125     r = request_fill(request, ap);
126     VAEND(ap);
127     return (r);
128 }
129