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/* $OpenBSD: update.c,v 1.7 2013/11/13 22:37:15 deraadt Exp $ */
/*
* 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.
*/
/* System libraries */
#include <stdio.h>
#include <stdarg.h>
#include <syslog.h>
#include <string.h>
#include <unistd.h>
/* Local stuff. */
#include "tcpd.h"
/* request_fill - request update engine */
static struct request_info *request_fill(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 *);
continue;
case RQ_SERVER_SIN:
request->server->sin = va_arg(ap, struct sockaddr *);
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;
}
strlcpy(ptr, va_arg(ap, char *), STRING_LENGTH);
}
return (request);
}
/* request_init - initialize request structure */
struct request_info *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.
*/
va_start(ap, request);
*request = default_info;
request->fd = -1;
strlcpy(request->daemon, unknown, sizeof(request->daemon));
snprintf(request->pid, sizeof(request->pid), "%ld", (long)getpid());
request->client->request = request;
request->server->request = request;
r = request_fill(request, ap);
va_end(ap);
return (r);
}
/* request_set - update request structure */
struct request_info *request_set(struct request_info *request, ...)
{
struct request_info *r;
va_list ap;
va_start(ap, request);
r = request_fill(request, ap);
va_end(ap);
return (r);
}
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