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: src/contrib/tcp_wrappers/update.c,v 1.2 2000/02/03 10:27:00 shin Exp $
16 */
17
18 /* System libraries */
19
20 #include <stdarg.h>
21 #include <stdio.h>
22 #include <syslog.h>
23 #include <string.h>
24 #include <unistd.h>
25
26 /* Local stuff. */
27
28 #include "tcpd.h"
29
30 /* request_fill - request update engine */
31
request_fill(request,ap)32 static struct request_info *request_fill(request, ap)
33 struct request_info *request;
34 va_list ap;
35 {
36 int key;
37 char *ptr;
38
39 while ((key = va_arg(ap, int)) > 0) {
40 switch (key) {
41 default:
42 tcpd_warn("request_fill: invalid key: %d", key);
43 return (request);
44 case RQ_FILE:
45 request->fd = va_arg(ap, int);
46 continue;
47 case RQ_CLIENT_SIN:
48 #ifdef INET6
49 request->client->sin = va_arg(ap, struct sockaddr *);
50 #else
51 request->client->sin = va_arg(ap, struct sockaddr_in *);
52 #endif
53 continue;
54 case RQ_SERVER_SIN:
55 #ifdef INET6
56 request->server->sin = va_arg(ap, struct sockaddr *);
57 #else
58 request->server->sin = va_arg(ap, struct sockaddr_in *);
59 #endif
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
request_init(struct request_info * request,...)92 struct request_info *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 va_start(ap, 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 va_end(ap);
112 return (r);
113 }
114
115 /* request_set - update request structure */
116
request_set(struct request_info * request,...)117 struct request_info *request_set(struct request_info *request, ...)
118 {
119 struct request_info *r;
120 va_list ap;
121
122 va_start(ap, request);
123 r = request_fill(request, ap);
124 va_end(ap);
125 return (r);
126 }
127