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