update.c revision 56977 
1 /*
2  * Routines for controlled update/initialization of request structures.
3  *
4  * request_init() initializes its argument. Pointers and string-valued members
5  * are initialized to zero, to indicate that no lookup has been attempted.
6  *
7  * request_set() adds information to an already initialized request structure.
8  *
9  * Both functions take a variable-length name-value list.
10  *
11  * Diagnostics are reported through syslog(3).
12  *
13  * Author: Wietse Venema, Eindhoven University of Technology, The Netherlands.
14  *
15  * $FreeBSD: head/contrib/tcp_wrappers/update.c 56977 2000-02-03 10:27:03Z shin $
16  */
17
18#ifndef lint
19static char sccsid[] = "@(#) update.c 1.1 94/12/28 17:42:56";
20#endif
21
22/* System libraries */
23
24#include <stdio.h>
25#include <syslog.h>
26#include <string.h>
27
28/* Local stuff. */
29
30#include "mystdarg.h"
31#include "tcpd.h"
32
33/* request_fill - request update engine */
34
35static struct request_info *request_fill(request, ap)
36struct request_info *request;
37va_list ap;
38{
39    int     key;
40    char   *ptr;
41
42    while ((key = va_arg(ap, int)) > 0) {
43	switch (key) {
44	default:
45	    tcpd_warn("request_fill: invalid key: %d", key);
46	    return (request);
47	case RQ_FILE:
48	    request->fd = va_arg(ap, int);
49	    continue;
50	case RQ_CLIENT_SIN:
51#ifdef INET6
52	    request->client->sin = va_arg(ap, struct sockaddr *);
53#else
54	    request->client->sin = va_arg(ap, struct sockaddr_in *);
55#endif
56	    continue;
57	case RQ_SERVER_SIN:
58#ifdef INET6
59	    request->server->sin = va_arg(ap, struct sockaddr *);
60#else
61	    request->server->sin = va_arg(ap, struct sockaddr_in *);
62#endif
63	    continue;
64
65	    /*
66	     * All other fields are strings with the same maximal length.
67	     */
68
69	case RQ_DAEMON:
70	    ptr = request->daemon;
71	    break;
72	case RQ_USER:
73	    ptr = request->user;
74	    break;
75	case RQ_CLIENT_NAME:
76	    ptr = request->client->name;
77	    break;
78	case RQ_CLIENT_ADDR:
79	    ptr = request->client->addr;
80	    break;
81	case RQ_SERVER_NAME:
82	    ptr = request->server->name;
83	    break;
84	case RQ_SERVER_ADDR:
85	    ptr = request->server->addr;
86	    break;
87	}
88	STRN_CPY(ptr, va_arg(ap, char *), STRING_LENGTH);
89    }
90    return (request);
91}
92
93/* request_init - initialize request structure */
94
95struct request_info *VARARGS(request_init, struct request_info *, request)
96{
97    static struct request_info default_info;
98    struct request_info *r;
99    va_list ap;
100
101    /*
102     * Initialize data members. We do not assign default function pointer
103     * members, to avoid pulling in the whole socket module when it is not
104     * really needed.
105     */
106    VASTART(ap, struct request_info *, request);
107    *request = default_info;
108    request->fd = -1;
109    strcpy(request->daemon, unknown);
110    sprintf(request->pid, "%d", getpid());
111    request->client->request = request;
112    request->server->request = request;
113    r = request_fill(request, ap);
114    VAEND(ap);
115    return (r);
116}
117
118/* request_set - update request structure */
119
120struct request_info *VARARGS(request_set, struct request_info *, request)
121{
122    struct request_info *r;
123    va_list ap;
124
125    VASTART(ap, struct request_info *, request);
126    r = request_fill(request, ap);
127    VAEND(ap);
128    return (r);
129}
130