1 /* $NetBSD: update.c,v 1.9 2012/03/21 10:10:37 matt Exp $ */
2
3 /*
4 * Routines for controlled update/initialization of request structures.
5 *
6 * request_init() initializes its argument. Pointers and string-valued members
7 * are initialized to zero, to indicate that no lookup has been attempted.
8 *
9 * request_set() adds information to an already initialized request structure.
10 *
11 * Both functions take a variable-length name-value list.
12 *
13 * Diagnostics are reported through syslog(3).
14 *
15 * Author: Wietse Venema, Eindhoven University of Technology, The Netherlands.
16 */
17
18 #include <sys/cdefs.h>
19 #ifndef lint
20 #if 0
21 static char sccsid[] = "@(#) update.c 1.1 94/12/28 17:42:56";
22 #else
23 __RCSID("$NetBSD: update.c,v 1.9 2012/03/21 10:10:37 matt Exp $");
24 #endif
25 #endif
26
27 /* System libraries */
28
29 #include <stdio.h>
30 #include <syslog.h>
31 #include <string.h>
32 #include <unistd.h>
33
34 /* Local stuff. */
35
36 #include "mystdarg.h"
37 #include "tcpd.h"
38
39 static struct request_info *request_fill(struct request_info *, va_list);
40
41 /* request_fill - request update engine */
42
43 static struct request_info *
request_fill(struct request_info * request,va_list ap)44 request_fill(struct request_info *request, 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 *);
59 continue;
60 case RQ_SERVER_SIN:
61 request->server->sin = va_arg(ap, struct sockaddr *);
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 strlcpy(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 (void)strlcpy(request->daemon, unknown, sizeof(request->daemon));
109 (void)snprintf(request->pid, sizeof(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