Imported from /home/lorry/working-area/delta_tcp-wrappers/tcp_wrappers_7.6.tar.gz.HEADtcp_wrappers_7.6master

1 files changed, 119 insertions, 0 deletions

diff --git a/update.c b/update.c
new file mode 100644
index 0000000..a76cf2b
--- /dev/null
+++ b/update.c
@@ -0,0 +1,119 @@
+ /*
+  * Routines for controlled update/initialization of request structures.
+  * 
+  * request_init() initializes its argument. Pointers and string-valued members
+  * are initialized to zero, to indicate that no lookup has been attempted.
+  * 
+  * request_set() adds information to an already initialized request structure.
+  * 
+  * Both functions take a variable-length name-value list.
+  * 
+  * Diagnostics are reported through syslog(3).
+  * 
+  * Author: Wietse Venema, Eindhoven University of Technology, The Netherlands.
+  */
+
+#ifndef lint
+static char sccsid[] = "@(#) update.c 1.1 94/12/28 17:42:56";
+#endif
+
+/* System libraries */
+
+#include <stdio.h>
+#include <syslog.h>
+#include <string.h>
+
+/* Local stuff. */
+
+#include "mystdarg.h"
+#include "tcpd.h"
+
+/* request_fill - request update engine */
+
+static struct request_info *request_fill(request, ap)
+struct request_info *request;
+va_list ap;
+{
+    int     key;
+    char   *ptr;
+
+    while ((key = va_arg(ap, int)) > 0) {
+	switch (key) {
+	default:
+	    tcpd_warn("request_fill: invalid key: %d", key);
+	    return (request);
+	case RQ_FILE:
+	    request->fd = va_arg(ap, int);
+	    continue;
+	case RQ_CLIENT_SIN:
+	    request->client->sin = va_arg(ap, struct sockaddr_in *);
+	    continue;
+	case RQ_SERVER_SIN:
+	    request->server->sin = va_arg(ap, struct sockaddr_in *);
+	    continue;
+
+	    /*
+	     * All other fields are strings with the same maximal length.
+	     */
+
+	case RQ_DAEMON:
+	    ptr = request->daemon;
+	    break;
+	case RQ_USER:
+	    ptr = request->user;
+	    break;
+	case RQ_CLIENT_NAME:
+	    ptr = request->client->name;
+	    break;
+	case RQ_CLIENT_ADDR:
+	    ptr = request->client->addr;
+	    break;
+	case RQ_SERVER_NAME:
+	    ptr = request->server->name;
+	    break;
+	case RQ_SERVER_ADDR:
+	    ptr = request->server->addr;
+	    break;
+	}
+	STRN_CPY(ptr, va_arg(ap, char *), STRING_LENGTH);
+    }
+    return (request);
+}
+
+/* request_init - initialize request structure */
+
+struct request_info *VARARGS(request_init, struct request_info *, request)
+{
+    static struct request_info default_info;
+    struct request_info *r;
+    va_list ap;
+
+    /*
+     * Initialize data members. We do not assign default function pointer
+     * members, to avoid pulling in the whole socket module when it is not
+     * really needed.
+     */
+    VASTART(ap, struct request_info *, request);
+    *request = default_info;
+    request->fd = -1;
+    strcpy(request->daemon, unknown);
+    sprintf(request->pid, "%d", getpid());
+    request->client->request = request;
+    request->server->request = request;
+    r = request_fill(request, ap);
+    VAEND(ap);
+    return (r);
+}
+
+/* request_set - update request structure */
+
+struct request_info *VARARGS(request_set, struct request_info *, request)
+{
+    struct request_info *r;
+    va_list ap;
+
+    VASTART(ap, struct request_info *, request);
+    r = request_fill(request, ap);
+    VAEND(ap);
+    return (r);
+}