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
16#ifndef lint
17static char sccsid[] = "@(#) update.c 1.1 94/12/28 17:42:56";
18#endif
19
20/* System libraries */
21
22#include <stdio.h>
23#include <syslog.h>
24#include <string.h>
25
26/* Local stuff. */
27
28#include "mystdarg.h"
29#include "tcpd.h"
30
31/* request_fill - request update engine */
32
33static struct request_info *request_fill(request, ap)
34struct request_info *request;
35va_list ap;
36{
37 int key;
38 char *ptr;
39
40 while ((key = va_arg(ap, int)) > 0) {
41 switch (key) {
42 default:
43 tcpd_warn("request_fill: invalid key: %d", key);
44 return (request);
45 case RQ_FILE:
46 request->fd = va_arg(ap, int);
47 continue;
48 case RQ_CLIENT_SIN:
49 request->client->sin = va_arg(ap, struct sockaddr_in *);
50 continue;
51 case RQ_SERVER_SIN:
52 request->server->sin = va_arg(ap, struct sockaddr_in *);
53 continue;
54
55 /*
56 * All other fields are strings with the same maximal length.
57 */
58
59 case RQ_DAEMON:
60 ptr = request->daemon;
61 break;
62 case RQ_USER:
63 ptr = request->user;
64 break;
65 case RQ_CLIENT_NAME:
66 ptr = request->client->name;
67 break;
68 case RQ_CLIENT_ADDR:
69 ptr = request->client->addr;
70 break;
71 case RQ_SERVER_NAME:
72 ptr = request->server->name;
73 break;
74 case RQ_SERVER_ADDR:
75 ptr = request->server->addr;
76 break;
77 }
78 STRN_CPY(ptr, va_arg(ap, char *), STRING_LENGTH);
79 }
80 return (request);
81}
82
83/* request_init - initialize request structure */
84
85struct request_info *VARARGS(request_init, struct request_info *, request)
86{
87 static struct request_info default_info;
88 struct request_info *r;
89 va_list ap;
90
91 /*
92 * Initialize data members. We do not assign default function pointer
93 * members, to avoid pulling in the whole socket module when it is not
94 * really needed.
95 */
96 VASTART(ap, struct request_info *, request);
97 *request = default_info;
98 request->fd = -1;
99 strcpy(request->daemon, unknown);
100 sprintf(request->pid, "%d", getpid());
101 request->client->request = request;
102 request->server->request = request;
103 r = request_fill(request, ap);
104 VAEND(ap);
105 return (r);
106}
107
108/* request_set - update request structure */
109
110struct request_info *VARARGS(request_set, struct request_info *, request)
111{
112 struct request_info *r;
113 va_list ap;
114
115 VASTART(ap, struct request_info *, request);
116 r = request_fill(request, ap);
117 VAEND(ap);
118 return (r);
119}