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8053080cbc
Now when tcp_wrapper is enabled by inetd -wW,
several accesses which should be permitted are refused only for IPv6,
if hostname is used to decide the host to be allowed.
IPv6 users will be just upset.
About security related concern.
-All extensions are wrapped by #ifdef INET6, so people can completely
disable the extension by recompile libwrap without INET6 option.
-Access via IPv6 is not enabled by default.
People need to enable IPv6 access by changing /etc/inetd.conf at first,
by adding tcp6 and/or tcp46 entries.
-The base of patches are from KAME package and are actually daily used
for more than a year in several Japanese IPv6 environments.
-Patches are reviewed by markm.
Approved by: jkh
Submitted by: Hajimu UMEMOTO <ume@mahoroba.org>
Reviewed by: markm
Obtained from: KAME project
129 lines
3 KiB
C
129 lines
3 KiB
C
/*
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* Routines for controlled update/initialization of request structures.
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*
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* request_init() initializes its argument. Pointers and string-valued members
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* are initialized to zero, to indicate that no lookup has been attempted.
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*
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* request_set() adds information to an already initialized request structure.
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*
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* Both functions take a variable-length name-value list.
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*
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* Diagnostics are reported through syslog(3).
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*
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* Author: Wietse Venema, Eindhoven University of Technology, The Netherlands.
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*
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* $FreeBSD$
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*/
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#ifndef lint
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static char sccsid[] = "@(#) update.c 1.1 94/12/28 17:42:56";
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#endif
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/* System libraries */
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#include <stdio.h>
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#include <syslog.h>
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#include <string.h>
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/* Local stuff. */
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#include "mystdarg.h"
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#include "tcpd.h"
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/* request_fill - request update engine */
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static struct request_info *request_fill(request, ap)
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struct request_info *request;
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va_list ap;
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{
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int key;
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char *ptr;
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while ((key = va_arg(ap, int)) > 0) {
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switch (key) {
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default:
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tcpd_warn("request_fill: invalid key: %d", key);
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return (request);
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case RQ_FILE:
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request->fd = va_arg(ap, int);
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continue;
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case RQ_CLIENT_SIN:
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#ifdef INET6
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request->client->sin = va_arg(ap, struct sockaddr *);
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#else
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request->client->sin = va_arg(ap, struct sockaddr_in *);
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#endif
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continue;
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case RQ_SERVER_SIN:
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#ifdef INET6
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request->server->sin = va_arg(ap, struct sockaddr *);
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#else
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request->server->sin = va_arg(ap, struct sockaddr_in *);
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#endif
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continue;
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/*
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* All other fields are strings with the same maximal length.
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*/
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case RQ_DAEMON:
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ptr = request->daemon;
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break;
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case RQ_USER:
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ptr = request->user;
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break;
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case RQ_CLIENT_NAME:
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ptr = request->client->name;
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break;
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case RQ_CLIENT_ADDR:
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ptr = request->client->addr;
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break;
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case RQ_SERVER_NAME:
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ptr = request->server->name;
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break;
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case RQ_SERVER_ADDR:
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ptr = request->server->addr;
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break;
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}
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STRN_CPY(ptr, va_arg(ap, char *), STRING_LENGTH);
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}
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return (request);
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}
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/* request_init - initialize request structure */
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struct request_info *VARARGS(request_init, struct request_info *, request)
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{
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static struct request_info default_info;
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struct request_info *r;
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va_list ap;
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/*
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* Initialize data members. We do not assign default function pointer
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* members, to avoid pulling in the whole socket module when it is not
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* really needed.
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*/
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VASTART(ap, struct request_info *, request);
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*request = default_info;
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request->fd = -1;
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strcpy(request->daemon, unknown);
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sprintf(request->pid, "%d", getpid());
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request->client->request = request;
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request->server->request = request;
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r = request_fill(request, ap);
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VAEND(ap);
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return (r);
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}
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/* request_set - update request structure */
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struct request_info *VARARGS(request_set, struct request_info *, request)
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{
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struct request_info *r;
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va_list ap;
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VASTART(ap, struct request_info *, request);
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r = request_fill(request, ap);
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VAEND(ap);
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return (r);
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}
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