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 * $FreeBSD$
16 */
17
18 #ifndef lint
19 static 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 #include <unistd.h>
28
29 /* Local stuff. */
30
31 #include "mystdarg.h"
32 #include "tcpd.h"
33
34 /* request_fill - request update engine */
35
request_fill(request,ap)36 static struct request_info *request_fill(request, ap)
37 struct request_info *request;
38 va_list ap;
39 {
40 int key;
41 char *ptr;
42
43 while ((key = va_arg(ap, int)) > 0) {
44 switch (key) {
45 default:
46 tcpd_warn("request_fill: invalid key: %d", key);
47 return (request);
48 case RQ_FILE:
49 request->fd = va_arg(ap, int);
50 continue;
51 case RQ_CLIENT_SIN:
52 #ifdef INET6
53 request->client->sin = va_arg(ap, struct sockaddr *);
54 #else
55 request->client->sin = va_arg(ap, struct sockaddr_in *);
56 #endif
57 continue;
58 case RQ_SERVER_SIN:
59 #ifdef INET6
60 request->server->sin = va_arg(ap, struct sockaddr *);
61 #else
62 request->server->sin = va_arg(ap, struct sockaddr_in *);
63 #endif
64 continue;
65
66 /*
67 * All other fields are strings with the same maximal length.
68 */
69
70 case RQ_DAEMON:
71 ptr = request->daemon;
72 break;
73 case RQ_USER:
74 ptr = request->user;
75 break;
76 case RQ_CLIENT_NAME:
77 ptr = request->client->name;
78 break;
79 case RQ_CLIENT_ADDR:
80 ptr = request->client->addr;
81 break;
82 case RQ_SERVER_NAME:
83 ptr = request->server->name;
84 break;
85 case RQ_SERVER_ADDR:
86 ptr = request->server->addr;
87 break;
88 }
89 STRN_CPY(ptr, va_arg(ap, char *), STRING_LENGTH);
90 }
91 return (request);
92 }
93
94 /* request_init - initialize request structure */
95
VARARGS(request_init,struct request_info *,request)96 struct request_info *VARARGS(request_init, struct request_info *, request)
97 {
98 static struct request_info default_info;
99 struct request_info *r;
100 va_list ap;
101
102 /*
103 * Initialize data members. We do not assign default function pointer
104 * members, to avoid pulling in the whole socket module when it is not
105 * really needed.
106 */
107 VASTART(ap, struct request_info *, request);
108 *request = default_info;
109 request->fd = -1;
110 strcpy(request->daemon, unknown);
111 sprintf(request->pid, "%d", getpid());
112 request->client->request = request;
113 request->server->request = request;
114 r = request_fill(request, ap);
115 VAEND(ap);
116 return (r);
117 }
118
119 /* request_set - update request structure */
120
VARARGS(request_set,struct request_info *,request)121 struct request_info *VARARGS(request_set, struct request_info *, request)
122 {
123 struct request_info *r;
124 va_list ap;
125
126 VASTART(ap, struct request_info *, request);
127 r = request_fill(request, ap);
128 VAEND(ap);
129 return (r);
130 }
131