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freebsd-nq/usr.sbin/ypserv/yp_access.c

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Import the new, non-GPL ypserv, written by yours truly. Functionally equivalent to the old ypserv, except that it doesn't support the -p [port] option to force the server to use a particular port. The server stubs and yp.h header file are auto-generated from the yp.x protocol definition file. The auto-generated XDR routines in libc/yp are also used. The database access code has been broken out into a seperate module so that other NIS utilities (ypxfr in particular) can use it. Note that the old mknetid script is being temporarily moved here; it will be replaced by an mknetid program which will eventually have a home under /usr/src/libexec. (The existing script is actually somewhat broken -- it doesn't handle hosts -- but this isn't a big deal at this point since the netid.byname map is really only useful fopr Secure RPC, which we don't have yet.)
1995-12-16 20:54:17 +00:00
/*
* Copyright (c) 1995
* Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Bill Paul.
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
Duh: remember to #include <stdlib.h> to pick up declarations for malloc() and free().
1996-02-25 19:25:23 +00:00
#include <stdlib.h>
Import the new, non-GPL ypserv, written by yours truly. Functionally equivalent to the old ypserv, except that it doesn't support the -p [port] option to force the server to use a particular port. The server stubs and yp.h header file are auto-generated from the yp.x protocol definition file. The auto-generated XDR routines in libc/yp are also used. The database access code has been broken out into a seperate module so that other NIS utilities (ypxfr in particular) can use it. Note that the old mknetid script is being temporarily moved here; it will be replaced by an mknetid program which will eventually have a home under /usr/src/libexec. (The existing script is actually somewhat broken -- it doesn't handle hosts -- but this isn't a big deal at this point since the netid.byname map is really only useful fopr Secure RPC, which we don't have yet.)
1995-12-16 20:54:17 +00:00
#include <rpc/rpc.h>
Add real securenets support. By default, ypserv now uses /var/yp/securenets in the same was as the SunOS ypserv (same format, described in ypserv man page). If the user wants tcpwrapper style access control, they can recompile ypserv to use that instead. This way we get securenets without having to ship libwrap.a and tcpd.h with core FreeBSD distribution. If /var/yp/securenets doesn't exist, ypserv allows all connections.
1996-02-24 22:01:48 +00:00
#include <rpcsvc/yp.h>
#include <rpcsvc/yppasswd.h>
Close a potential security hole: if yp_access() is passed a map name, have it check to see that it doesn't contain any '/' characters. This prevents possible silliness like ypcat "../../../kernel". We already test the domain name for this in yp_validdomain(), and ypserv itself tests the map name in yp_open_db(), but it doesn't hurt to be paranoid and test for it in the generic access routine too. rpc.ypxfrd does not test the map name for slashes, but it does call yp_access() with the map name, so this removes a potential vulnerability from there. Also make the tests for IPPORT_RESERVED a little more selective: make sure it trips when map == master.passwd.*, prog == YPPROC and proc == YPPROC_XFR, and prog == YPXFRD_FREEBSD_PROG and proc == YPXFRD_GETMAP. Also use IPPORT_RESERVED instead of hard-coded value.
1996-09-30 22:27:00 +00:00
#include <rpcsvc/ypxfrd.h>
Import the new, non-GPL ypserv, written by yours truly. Functionally equivalent to the old ypserv, except that it doesn't support the -p [port] option to force the server to use a particular port. The server stubs and yp.h header file are auto-generated from the yp.x protocol definition file. The auto-generated XDR routines in libc/yp are also used. The database access code has been broken out into a seperate module so that other NIS utilities (ypxfr in particular) can use it. Note that the old mknetid script is being temporarily moved here; it will be replaced by an mknetid program which will eventually have a home under /usr/src/libexec. (The existing script is actually somewhat broken -- it doesn't handle hosts -- but this isn't a big deal at this point since the netid.byname map is really only useful fopr Secure RPC, which we don't have yet.)
1995-12-16 20:54:17 +00:00
#include <sys/types.h>
Performance enhancements (I hope) and new stuff: yp_dblookup.c: - Implement database handle caching. What this means is that instead of opening and closing map databases for each request, we open a database and save the handle (and, if requested, the key index) in an array. This saves a bit of overhead on things like repeated YPPROC_NEXT calls, such as you'd get from getpwent(). Normally, each YPPROC_NEXT would require open()ing the database, seeking to the location supplied by the caller (which is time consuming with hash databases as the R_CURSOR flag doesn't work), reading the data, close()ing the database and then shipping the data off to the caller. The system call overhead is prohibitive, especially with very large maps. By caching the handle to an open database, we elimitate at least the open()/close() system calls, as well as the associated DB setup and tear-down operations, for a large percentage of the time. This improves performance substantially at the cost of consuming a little more memory than before. Note that all the caching support is surrounded by #ifdef DB_CACHE so that this same source module can still be used by other programs that don't need it. - Make yp_open_db() call yp_validdomain(). Doing it here saves cycles when caching is enabled since a hit on the map cache list by definition means that the domain being referenced is valid. - Also make yp_open_db() check for exhaustion of file descriptors, just in case. yp_server.c: - Reorganize things a little to take advantage of the database handle caching. Add a call to yp_flush_all() in ypproc_clear_2_svc(). - Remove calls to yp_validdomain() from some of the service procedures. yp_validdomain() is called inside yp_open_db() now, so procedures that call into the database package don't need to use yp_validdomain() themselves. - Fix a bogosity in ypproc_maplist_2_svc(): don't summarily initiallize the result.maps pointer to NULL. This causes yp_maplist_free() to fail and leaks memory. - Make ypproc_master_2_svc() copy the string it gets from the database package into a private static buffer before trying to NUL terminate it. This is necessary with the DB handle caching: stuffing a NUL into the data returned by DB package will goof it up internally. yp_main.c: - Stuff for DB handle caching: call yp_init_dbs() to clear the handle array and add call to yp_flush_all() to the SIGHUP signal handler. Makefile.yp: - Reorganize to deal with database caching. yp_mkdb(8) can now be used to send a YPPROC_CLEAR signal to ypserv(8). Call it after each map is created to refresh ypserv's cache. - Add support for mail.alias map. Contributed by Mike Murphy (mrm@sceard.com). - Make default location for the netgroups source file be /var/yp/netgroup instead of /etc/netgroup. mkaliases: - New file: script to generate mail.alias map. Contributed by Mike Murphy (mrm@sceard.com). Makefile: - Install Makefile.yp as /var/yp/Makefile.dist and link it to /var/yp/Makefile only if /var/yp/Makefile doesn't already exist. Suggested by Peter Wemm. - Install new mkaliases script in /usr/libexec along with mknetid. - Use somewhat saner approach to generating rpcgen-dependent files as suggested by Garrett Wollman.
1996-04-28 04:38:52 +00:00
#include <limits.h>
#include <db.h>
Import the new, non-GPL ypserv, written by yours truly. Functionally equivalent to the old ypserv, except that it doesn't support the -p [port] option to force the server to use a particular port. The server stubs and yp.h header file are auto-generated from the yp.x protocol definition file. The auto-generated XDR routines in libc/yp are also used. The database access code has been broken out into a seperate module so that other NIS utilities (ypxfr in particular) can use it. Note that the old mknetid script is being temporarily moved here; it will be replaced by an mknetid program which will eventually have a home under /usr/src/libexec. (The existing script is actually somewhat broken -- it doesn't handle hosts -- but this isn't a big deal at this point since the netid.byname map is really only useful fopr Secure RPC, which we don't have yet.)
1995-12-16 20:54:17 +00:00
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/stat.h>
Performance enhancements (I hope) and new stuff: yp_dblookup.c: - Implement database handle caching. What this means is that instead of opening and closing map databases for each request, we open a database and save the handle (and, if requested, the key index) in an array. This saves a bit of overhead on things like repeated YPPROC_NEXT calls, such as you'd get from getpwent(). Normally, each YPPROC_NEXT would require open()ing the database, seeking to the location supplied by the caller (which is time consuming with hash databases as the R_CURSOR flag doesn't work), reading the data, close()ing the database and then shipping the data off to the caller. The system call overhead is prohibitive, especially with very large maps. By caching the handle to an open database, we elimitate at least the open()/close() system calls, as well as the associated DB setup and tear-down operations, for a large percentage of the time. This improves performance substantially at the cost of consuming a little more memory than before. Note that all the caching support is surrounded by #ifdef DB_CACHE so that this same source module can still be used by other programs that don't need it. - Make yp_open_db() call yp_validdomain(). Doing it here saves cycles when caching is enabled since a hit on the map cache list by definition means that the domain being referenced is valid. - Also make yp_open_db() check for exhaustion of file descriptors, just in case. yp_server.c: - Reorganize things a little to take advantage of the database handle caching. Add a call to yp_flush_all() in ypproc_clear_2_svc(). - Remove calls to yp_validdomain() from some of the service procedures. yp_validdomain() is called inside yp_open_db() now, so procedures that call into the database package don't need to use yp_validdomain() themselves. - Fix a bogosity in ypproc_maplist_2_svc(): don't summarily initiallize the result.maps pointer to NULL. This causes yp_maplist_free() to fail and leaks memory. - Make ypproc_master_2_svc() copy the string it gets from the database package into a private static buffer before trying to NUL terminate it. This is necessary with the DB handle caching: stuffing a NUL into the data returned by DB package will goof it up internally. yp_main.c: - Stuff for DB handle caching: call yp_init_dbs() to clear the handle array and add call to yp_flush_all() to the SIGHUP signal handler. Makefile.yp: - Reorganize to deal with database caching. yp_mkdb(8) can now be used to send a YPPROC_CLEAR signal to ypserv(8). Call it after each map is created to refresh ypserv's cache. - Add support for mail.alias map. Contributed by Mike Murphy (mrm@sceard.com). - Make default location for the netgroups source file be /var/yp/netgroup instead of /etc/netgroup. mkaliases: - New file: script to generate mail.alias map. Contributed by Mike Murphy (mrm@sceard.com). Makefile: - Install Makefile.yp as /var/yp/Makefile.dist and link it to /var/yp/Makefile only if /var/yp/Makefile doesn't already exist. Suggested by Peter Wemm. - Install new mkaliases script in /usr/libexec along with mknetid. - Use somewhat saner approach to generating rpcgen-dependent files as suggested by Garrett Wollman.
1996-04-28 04:38:52 +00:00
#include <sys/fcntl.h>
Import the new, non-GPL ypserv, written by yours truly. Functionally equivalent to the old ypserv, except that it doesn't support the -p [port] option to force the server to use a particular port. The server stubs and yp.h header file are auto-generated from the yp.x protocol definition file. The auto-generated XDR routines in libc/yp are also used. The database access code has been broken out into a seperate module so that other NIS utilities (ypxfr in particular) can use it. Note that the old mknetid script is being temporarily moved here; it will be replaced by an mknetid program which will eventually have a home under /usr/src/libexec. (The existing script is actually somewhat broken -- it doesn't handle hosts -- but this isn't a big deal at this point since the netid.byname map is really only useful fopr Secure RPC, which we don't have yet.)
1995-12-16 20:54:17 +00:00
#include <paths.h>
Add real securenets support. By default, ypserv now uses /var/yp/securenets in the same was as the SunOS ypserv (same format, described in ypserv man page). If the user wants tcpwrapper style access control, they can recompile ypserv to use that instead. This way we get securenets without having to ship libwrap.a and tcpd.h with core FreeBSD distribution. If /var/yp/securenets doesn't exist, ypserv allows all connections.
1996-02-24 22:01:48 +00:00
#include <errno.h>
Import the new, non-GPL ypserv, written by yours truly. Functionally equivalent to the old ypserv, except that it doesn't support the -p [port] option to force the server to use a particular port. The server stubs and yp.h header file are auto-generated from the yp.x protocol definition file. The auto-generated XDR routines in libc/yp are also used. The database access code has been broken out into a seperate module so that other NIS utilities (ypxfr in particular) can use it. Note that the old mknetid script is being temporarily moved here; it will be replaced by an mknetid program which will eventually have a home under /usr/src/libexec. (The existing script is actually somewhat broken -- it doesn't handle hosts -- but this isn't a big deal at this point since the netid.byname map is really only useful fopr Secure RPC, which we don't have yet.)
1995-12-16 20:54:17 +00:00
#include <sys/param.h>
#include "yp_extern.h"
#ifdef TCP_WRAPPER
#include "tcpd.h"
#endif
Add real securenets support. By default, ypserv now uses /var/yp/securenets in the same was as the SunOS ypserv (same format, described in ypserv man page). If the user wants tcpwrapper style access control, they can recompile ypserv to use that instead. This way we get securenets without having to ship libwrap.a and tcpd.h with core FreeBSD distribution. If /var/yp/securenets doesn't exist, ypserv allows all connections.
1996-02-24 22:01:48 +00:00
#ifndef lint
Close a potential security hole: if yp_access() is passed a map name, have it check to see that it doesn't contain any '/' characters. This prevents possible silliness like ypcat "../../../kernel". We already test the domain name for this in yp_validdomain(), and ypserv itself tests the map name in yp_open_db(), but it doesn't hurt to be paranoid and test for it in the generic access routine too. rpc.ypxfrd does not test the map name for slashes, but it does call yp_access() with the map name, so this removes a potential vulnerability from there. Also make the tests for IPPORT_RESERVED a little more selective: make sure it trips when map == master.passwd.*, prog == YPPROC and proc == YPPROC_XFR, and prog == YPXFRD_FREEBSD_PROG and proc == YPXFRD_GETMAP. Also use IPPORT_RESERVED instead of hard-coded value.
1996-09-30 22:27:00 +00:00
static const char rcsid[] = "$Id: yp_access.c,v 1.9 1996/06/05 02:01:29 wpaul Exp $";
Add real securenets support. By default, ypserv now uses /var/yp/securenets in the same was as the SunOS ypserv (same format, described in ypserv man page). If the user wants tcpwrapper style access control, they can recompile ypserv to use that instead. This way we get securenets without having to ship libwrap.a and tcpd.h with core FreeBSD distribution. If /var/yp/securenets doesn't exist, ypserv allows all connections.
1996-02-24 22:01:48 +00:00
#endif
Import the new, non-GPL ypserv, written by yours truly. Functionally equivalent to the old ypserv, except that it doesn't support the -p [port] option to force the server to use a particular port. The server stubs and yp.h header file are auto-generated from the yp.x protocol definition file. The auto-generated XDR routines in libc/yp are also used. The database access code has been broken out into a seperate module so that other NIS utilities (ypxfr in particular) can use it. Note that the old mknetid script is being temporarily moved here; it will be replaced by an mknetid program which will eventually have a home under /usr/src/libexec. (The existing script is actually somewhat broken -- it doesn't handle hosts -- but this isn't a big deal at this point since the netid.byname map is really only useful fopr Secure RPC, which we don't have yet.)
1995-12-16 20:54:17 +00:00
extern int debug;
Add support for NIS v1 client procedures. The following procedures are currently implemented: YPOLDPROC_NULL YPOLDPROC_DOMAIN YPOLDPROC_DOMAIN_NONACK YPOLDPROC_FIRST YPOLDPROC_NEXT YPOLDPROC_MATCH YPOLDPROC_POLL These are all implemented as wrappers around their v2 counterparts. The YPOLDPROC_PUSH, PULL and GET procedures are not implemented since a) I couldn't figure out exactly what to have them do, and b) I suspect they're used for doing map transfers between master and slave servers, which we already do using the v2 protocol anyway. This means we can server NIS v1 clients but can't be a master or slave with NIS v1-only servers. I think I'll get over it. :) The -k (sunos_4_kludge) flag and associated code has been removed since it is no longer needed. Also tweaked yp_access() to handle both sets of procedures and updated the man page.
1996-02-26 02:34:27 +00:00
/* NIS v1 */
char *yp_procs[] = { "ypoldproc_null",
"ypoldproc_domain",
"ypoldproc_domain_nonack",
"ypoldproc_match",
"ypoldproc_first",
"ypoldproc_next",
"ypoldproc_poll",
"ypoldproc_push",
"ypoldproc_get",
"badproc1", /* placeholder */
"badproc2", /* placeholder */
"badproc3", /* placeholder */
/* NIS v2 */
"ypproc_null" ,
Import the new, non-GPL ypserv, written by yours truly. Functionally equivalent to the old ypserv, except that it doesn't support the -p [port] option to force the server to use a particular port. The server stubs and yp.h header file are auto-generated from the yp.x protocol definition file. The auto-generated XDR routines in libc/yp are also used. The database access code has been broken out into a seperate module so that other NIS utilities (ypxfr in particular) can use it. Note that the old mknetid script is being temporarily moved here; it will be replaced by an mknetid program which will eventually have a home under /usr/src/libexec. (The existing script is actually somewhat broken -- it doesn't handle hosts -- but this isn't a big deal at this point since the netid.byname map is really only useful fopr Secure RPC, which we don't have yet.)
1995-12-16 20:54:17 +00:00
"ypproc_domain",
"ypproc_domain_nonack",
"ypproc_match",
"ypproc_first",
"ypproc_next",
"ypproc_xfr",
"ypproc_clear",
"ypproc_all",
"ypproc_master",
"ypproc_order",
"ypproc_maplist"
};
Add support for NIS v1 client procedures. The following procedures are currently implemented: YPOLDPROC_NULL YPOLDPROC_DOMAIN YPOLDPROC_DOMAIN_NONACK YPOLDPROC_FIRST YPOLDPROC_NEXT YPOLDPROC_MATCH YPOLDPROC_POLL These are all implemented as wrappers around their v2 counterparts. The YPOLDPROC_PUSH, PULL and GET procedures are not implemented since a) I couldn't figure out exactly what to have them do, and b) I suspect they're used for doing map transfers between master and slave servers, which we already do using the v2 protocol anyway. This means we can server NIS v1 clients but can't be a master or slave with NIS v1-only servers. I think I'll get over it. :) The -k (sunos_4_kludge) flag and associated code has been removed since it is no longer needed. Also tweaked yp_access() to handle both sets of procedures and updated the man page.
1996-02-26 02:34:27 +00:00
Add real securenets support. By default, ypserv now uses /var/yp/securenets in the same was as the SunOS ypserv (same format, described in ypserv man page). If the user wants tcpwrapper style access control, they can recompile ypserv to use that instead. This way we get securenets without having to ship libwrap.a and tcpd.h with core FreeBSD distribution. If /var/yp/securenets doesn't exist, ypserv allows all connections.
1996-02-24 22:01:48 +00:00
#ifdef TCP_WRAPPER
void load_securenets()
{
}
#else
struct securenet {
struct in_addr net;
struct in_addr mask;
struct securenet *next;
};
struct securenet *securenets;
#define LINEBUFSZ 1024
/*
* Read /var/yp/securenets file and initialize the securenets
* list. If the file doesn't exist, we set up a dummy entry that
* allows all hosts to connect.
*/
void load_securenets()
{
FILE *fp;
char path[MAXPATHLEN + 2];
char linebuf[1024 + 2];
struct securenet *tmp;
/*
* If securenets is not NULL, we are being called to reload
* the list; free the existing list before re-reading the
* securenets file.
*/
Performance enhancements (I hope) and new stuff: yp_dblookup.c: - Implement database handle caching. What this means is that instead of opening and closing map databases for each request, we open a database and save the handle (and, if requested, the key index) in an array. This saves a bit of overhead on things like repeated YPPROC_NEXT calls, such as you'd get from getpwent(). Normally, each YPPROC_NEXT would require open()ing the database, seeking to the location supplied by the caller (which is time consuming with hash databases as the R_CURSOR flag doesn't work), reading the data, close()ing the database and then shipping the data off to the caller. The system call overhead is prohibitive, especially with very large maps. By caching the handle to an open database, we elimitate at least the open()/close() system calls, as well as the associated DB setup and tear-down operations, for a large percentage of the time. This improves performance substantially at the cost of consuming a little more memory than before. Note that all the caching support is surrounded by #ifdef DB_CACHE so that this same source module can still be used by other programs that don't need it. - Make yp_open_db() call yp_validdomain(). Doing it here saves cycles when caching is enabled since a hit on the map cache list by definition means that the domain being referenced is valid. - Also make yp_open_db() check for exhaustion of file descriptors, just in case. yp_server.c: - Reorganize things a little to take advantage of the database handle caching. Add a call to yp_flush_all() in ypproc_clear_2_svc(). - Remove calls to yp_validdomain() from some of the service procedures. yp_validdomain() is called inside yp_open_db() now, so procedures that call into the database package don't need to use yp_validdomain() themselves. - Fix a bogosity in ypproc_maplist_2_svc(): don't summarily initiallize the result.maps pointer to NULL. This causes yp_maplist_free() to fail and leaks memory. - Make ypproc_master_2_svc() copy the string it gets from the database package into a private static buffer before trying to NUL terminate it. This is necessary with the DB handle caching: stuffing a NUL into the data returned by DB package will goof it up internally. yp_main.c: - Stuff for DB handle caching: call yp_init_dbs() to clear the handle array and add call to yp_flush_all() to the SIGHUP signal handler. Makefile.yp: - Reorganize to deal with database caching. yp_mkdb(8) can now be used to send a YPPROC_CLEAR signal to ypserv(8). Call it after each map is created to refresh ypserv's cache. - Add support for mail.alias map. Contributed by Mike Murphy (mrm@sceard.com). - Make default location for the netgroups source file be /var/yp/netgroup instead of /etc/netgroup. mkaliases: - New file: script to generate mail.alias map. Contributed by Mike Murphy (mrm@sceard.com). Makefile: - Install Makefile.yp as /var/yp/Makefile.dist and link it to /var/yp/Makefile only if /var/yp/Makefile doesn't already exist. Suggested by Peter Wemm. - Install new mkaliases script in /usr/libexec along with mknetid. - Use somewhat saner approach to generating rpcgen-dependent files as suggested by Garrett Wollman.
1996-04-28 04:38:52 +00:00
while(securenets) {
tmp = securenets->next;
free(securenets);
securenets = tmp;
Add real securenets support. By default, ypserv now uses /var/yp/securenets in the same was as the SunOS ypserv (same format, described in ypserv man page). If the user wants tcpwrapper style access control, they can recompile ypserv to use that instead. This way we get securenets without having to ship libwrap.a and tcpd.h with core FreeBSD distribution. If /var/yp/securenets doesn't exist, ypserv allows all connections.
1996-02-24 22:01:48 +00:00
}
snprintf(path, MAXPATHLEN, "%s/securenets", yp_dir);
if ((fp = fopen(path, "r")) == NULL) {
if (errno == ENOENT) {
securenets = (struct securenet *)malloc(sizeof(struct securenet));
securenets->net.s_addr = INADDR_ANY;
sense of 'mask' was reversed in default case of no securenets file.
1996-02-29 18:29:24 +00:00
securenets->mask.s_addr = INADDR_ANY;
Add real securenets support. By default, ypserv now uses /var/yp/securenets in the same was as the SunOS ypserv (same format, described in ypserv man page). If the user wants tcpwrapper style access control, they can recompile ypserv to use that instead. This way we get securenets without having to ship libwrap.a and tcpd.h with core FreeBSD distribution. If /var/yp/securenets doesn't exist, ypserv allows all connections.
1996-02-24 22:01:48 +00:00
securenets->next = NULL;
return;
} else {
yp_error("fopen(%s) failed: %s", path, strerror(errno));
exit(1);
}
}
securenets = NULL;
while(fgets(linebuf, LINEBUFSZ, fp)) {
char addr1[20], addr2[20];
if (linebuf[0] == '#')
continue;
if (sscanf(linebuf, "%s %s", addr1, addr2) < 2) {
yp_error("badly formatted securenets entry: %s",
linebuf);
continue;
}
tmp = (struct securenet *)malloc(sizeof(struct securenet));
if (!inet_aton((char *)&addr1, (struct in_addr *)&tmp->net)) {
yp_error("badly formatted securenets entry: %s", addr1);
free(tmp);
continue;
}
if (!inet_aton((char *)&addr2, (struct in_addr *)&tmp->mask)) {
yp_error("badly formatted securenets entry: %s", addr2);
free(tmp);
continue;
}
tmp->next = securenets;
securenets = tmp;
}
fclose(fp);
}
#endif
Import the new, non-GPL ypserv, written by yours truly. Functionally equivalent to the old ypserv, except that it doesn't support the -p [port] option to force the server to use a particular port. The server stubs and yp.h header file are auto-generated from the yp.x protocol definition file. The auto-generated XDR routines in libc/yp are also used. The database access code has been broken out into a seperate module so that other NIS utilities (ypxfr in particular) can use it. Note that the old mknetid script is being temporarily moved here; it will be replaced by an mknetid program which will eventually have a home under /usr/src/libexec. (The existing script is actually somewhat broken -- it doesn't handle hosts -- but this isn't a big deal at this point since the netid.byname map is really only useful fopr Secure RPC, which we don't have yet.)
1995-12-16 20:54:17 +00:00
/*
* Access control functions.
*
* yp_access() checks the mapname and client host address and watches for
* the following things:
*
* - If the client is referencing one of the master.passwd.* maps, it must
* be using a privileged port to make its RPC to us. If it is, then we can
* assume that the caller is root and allow the RPC to succeed. If it
* isn't access is denied.
*
Add real securenets support. By default, ypserv now uses /var/yp/securenets in the same was as the SunOS ypserv (same format, described in ypserv man page). If the user wants tcpwrapper style access control, they can recompile ypserv to use that instead. This way we get securenets without having to ship libwrap.a and tcpd.h with core FreeBSD distribution. If /var/yp/securenets doesn't exist, ypserv allows all connections.
1996-02-24 22:01:48 +00:00
* - The client's IP address is checked against the securenets rules.
* There are two kinds of securenets support: the built-in support,
Performance enhancements (I hope) and new stuff: yp_dblookup.c: - Implement database handle caching. What this means is that instead of opening and closing map databases for each request, we open a database and save the handle (and, if requested, the key index) in an array. This saves a bit of overhead on things like repeated YPPROC_NEXT calls, such as you'd get from getpwent(). Normally, each YPPROC_NEXT would require open()ing the database, seeking to the location supplied by the caller (which is time consuming with hash databases as the R_CURSOR flag doesn't work), reading the data, close()ing the database and then shipping the data off to the caller. The system call overhead is prohibitive, especially with very large maps. By caching the handle to an open database, we elimitate at least the open()/close() system calls, as well as the associated DB setup and tear-down operations, for a large percentage of the time. This improves performance substantially at the cost of consuming a little more memory than before. Note that all the caching support is surrounded by #ifdef DB_CACHE so that this same source module can still be used by other programs that don't need it. - Make yp_open_db() call yp_validdomain(). Doing it here saves cycles when caching is enabled since a hit on the map cache list by definition means that the domain being referenced is valid. - Also make yp_open_db() check for exhaustion of file descriptors, just in case. yp_server.c: - Reorganize things a little to take advantage of the database handle caching. Add a call to yp_flush_all() in ypproc_clear_2_svc(). - Remove calls to yp_validdomain() from some of the service procedures. yp_validdomain() is called inside yp_open_db() now, so procedures that call into the database package don't need to use yp_validdomain() themselves. - Fix a bogosity in ypproc_maplist_2_svc(): don't summarily initiallize the result.maps pointer to NULL. This causes yp_maplist_free() to fail and leaks memory. - Make ypproc_master_2_svc() copy the string it gets from the database package into a private static buffer before trying to NUL terminate it. This is necessary with the DB handle caching: stuffing a NUL into the data returned by DB package will goof it up internally. yp_main.c: - Stuff for DB handle caching: call yp_init_dbs() to clear the handle array and add call to yp_flush_all() to the SIGHUP signal handler. Makefile.yp: - Reorganize to deal with database caching. yp_mkdb(8) can now be used to send a YPPROC_CLEAR signal to ypserv(8). Call it after each map is created to refresh ypserv's cache. - Add support for mail.alias map. Contributed by Mike Murphy (mrm@sceard.com). - Make default location for the netgroups source file be /var/yp/netgroup instead of /etc/netgroup. mkaliases: - New file: script to generate mail.alias map. Contributed by Mike Murphy (mrm@sceard.com). Makefile: - Install Makefile.yp as /var/yp/Makefile.dist and link it to /var/yp/Makefile only if /var/yp/Makefile doesn't already exist. Suggested by Peter Wemm. - Install new mkaliases script in /usr/libexec along with mknetid. - Use somewhat saner approach to generating rpcgen-dependent files as suggested by Garrett Wollman.
1996-04-28 04:38:52 +00:00
* which is very simple and depends on the presence of a
Add real securenets support. By default, ypserv now uses /var/yp/securenets in the same was as the SunOS ypserv (same format, described in ypserv man page). If the user wants tcpwrapper style access control, they can recompile ypserv to use that instead. This way we get securenets without having to ship libwrap.a and tcpd.h with core FreeBSD distribution. If /var/yp/securenets doesn't exist, ypserv allows all connections.
1996-02-24 22:01:48 +00:00
* /var/yp/securenets file, and tcp-wrapper support, which requires
* Wietse Venema's libwrap.a and tcpd.h. (Since the tcp-wrapper
* package does not ship with FreeBSD, we use the built-in support
Performance enhancements (I hope) and new stuff: yp_dblookup.c: - Implement database handle caching. What this means is that instead of opening and closing map databases for each request, we open a database and save the handle (and, if requested, the key index) in an array. This saves a bit of overhead on things like repeated YPPROC_NEXT calls, such as you'd get from getpwent(). Normally, each YPPROC_NEXT would require open()ing the database, seeking to the location supplied by the caller (which is time consuming with hash databases as the R_CURSOR flag doesn't work), reading the data, close()ing the database and then shipping the data off to the caller. The system call overhead is prohibitive, especially with very large maps. By caching the handle to an open database, we elimitate at least the open()/close() system calls, as well as the associated DB setup and tear-down operations, for a large percentage of the time. This improves performance substantially at the cost of consuming a little more memory than before. Note that all the caching support is surrounded by #ifdef DB_CACHE so that this same source module can still be used by other programs that don't need it. - Make yp_open_db() call yp_validdomain(). Doing it here saves cycles when caching is enabled since a hit on the map cache list by definition means that the domain being referenced is valid. - Also make yp_open_db() check for exhaustion of file descriptors, just in case. yp_server.c: - Reorganize things a little to take advantage of the database handle caching. Add a call to yp_flush_all() in ypproc_clear_2_svc(). - Remove calls to yp_validdomain() from some of the service procedures. yp_validdomain() is called inside yp_open_db() now, so procedures that call into the database package don't need to use yp_validdomain() themselves. - Fix a bogosity in ypproc_maplist_2_svc(): don't summarily initiallize the result.maps pointer to NULL. This causes yp_maplist_free() to fail and leaks memory. - Make ypproc_master_2_svc() copy the string it gets from the database package into a private static buffer before trying to NUL terminate it. This is necessary with the DB handle caching: stuffing a NUL into the data returned by DB package will goof it up internally. yp_main.c: - Stuff for DB handle caching: call yp_init_dbs() to clear the handle array and add call to yp_flush_all() to the SIGHUP signal handler. Makefile.yp: - Reorganize to deal with database caching. yp_mkdb(8) can now be used to send a YPPROC_CLEAR signal to ypserv(8). Call it after each map is created to refresh ypserv's cache. - Add support for mail.alias map. Contributed by Mike Murphy (mrm@sceard.com). - Make default location for the netgroups source file be /var/yp/netgroup instead of /etc/netgroup. mkaliases: - New file: script to generate mail.alias map. Contributed by Mike Murphy (mrm@sceard.com). Makefile: - Install Makefile.yp as /var/yp/Makefile.dist and link it to /var/yp/Makefile only if /var/yp/Makefile doesn't already exist. Suggested by Peter Wemm. - Install new mkaliases script in /usr/libexec along with mknetid. - Use somewhat saner approach to generating rpcgen-dependent files as suggested by Garrett Wollman.
1996-04-28 04:38:52 +00:00
* by default. Users can recompile the server with the tcp-wrapper library
Add real securenets support. By default, ypserv now uses /var/yp/securenets in the same was as the SunOS ypserv (same format, described in ypserv man page). If the user wants tcpwrapper style access control, they can recompile ypserv to use that instead. This way we get securenets without having to ship libwrap.a and tcpd.h with core FreeBSD distribution. If /var/yp/securenets doesn't exist, ypserv allows all connections.
1996-02-24 22:01:48 +00:00
* if they already have it installed and want to use hosts.allow and
Performance enhancements (I hope) and new stuff: yp_dblookup.c: - Implement database handle caching. What this means is that instead of opening and closing map databases for each request, we open a database and save the handle (and, if requested, the key index) in an array. This saves a bit of overhead on things like repeated YPPROC_NEXT calls, such as you'd get from getpwent(). Normally, each YPPROC_NEXT would require open()ing the database, seeking to the location supplied by the caller (which is time consuming with hash databases as the R_CURSOR flag doesn't work), reading the data, close()ing the database and then shipping the data off to the caller. The system call overhead is prohibitive, especially with very large maps. By caching the handle to an open database, we elimitate at least the open()/close() system calls, as well as the associated DB setup and tear-down operations, for a large percentage of the time. This improves performance substantially at the cost of consuming a little more memory than before. Note that all the caching support is surrounded by #ifdef DB_CACHE so that this same source module can still be used by other programs that don't need it. - Make yp_open_db() call yp_validdomain(). Doing it here saves cycles when caching is enabled since a hit on the map cache list by definition means that the domain being referenced is valid. - Also make yp_open_db() check for exhaustion of file descriptors, just in case. yp_server.c: - Reorganize things a little to take advantage of the database handle caching. Add a call to yp_flush_all() in ypproc_clear_2_svc(). - Remove calls to yp_validdomain() from some of the service procedures. yp_validdomain() is called inside yp_open_db() now, so procedures that call into the database package don't need to use yp_validdomain() themselves. - Fix a bogosity in ypproc_maplist_2_svc(): don't summarily initiallize the result.maps pointer to NULL. This causes yp_maplist_free() to fail and leaks memory. - Make ypproc_master_2_svc() copy the string it gets from the database package into a private static buffer before trying to NUL terminate it. This is necessary with the DB handle caching: stuffing a NUL into the data returned by DB package will goof it up internally. yp_main.c: - Stuff for DB handle caching: call yp_init_dbs() to clear the handle array and add call to yp_flush_all() to the SIGHUP signal handler. Makefile.yp: - Reorganize to deal with database caching. yp_mkdb(8) can now be used to send a YPPROC_CLEAR signal to ypserv(8). Call it after each map is created to refresh ypserv's cache. - Add support for mail.alias map. Contributed by Mike Murphy (mrm@sceard.com). - Make default location for the netgroups source file be /var/yp/netgroup instead of /etc/netgroup. mkaliases: - New file: script to generate mail.alias map. Contributed by Mike Murphy (mrm@sceard.com). Makefile: - Install Makefile.yp as /var/yp/Makefile.dist and link it to /var/yp/Makefile only if /var/yp/Makefile doesn't already exist. Suggested by Peter Wemm. - Install new mkaliases script in /usr/libexec along with mknetid. - Use somewhat saner approach to generating rpcgen-dependent files as suggested by Garrett Wollman.
1996-04-28 04:38:52 +00:00
* hosts.deny to control access instead of having a seperate securenets
Add real securenets support. By default, ypserv now uses /var/yp/securenets in the same was as the SunOS ypserv (same format, described in ypserv man page). If the user wants tcpwrapper style access control, they can recompile ypserv to use that instead. This way we get securenets without having to ship libwrap.a and tcpd.h with core FreeBSD distribution. If /var/yp/securenets doesn't exist, ypserv allows all connections.
1996-02-24 22:01:48 +00:00
* file.)
*
* If no /var/yp/securenets file is present, the host access checks
* are bypassed and all hosts are allowed to connect.
Import the new, non-GPL ypserv, written by yours truly. Functionally equivalent to the old ypserv, except that it doesn't support the -p [port] option to force the server to use a particular port. The server stubs and yp.h header file are auto-generated from the yp.x protocol definition file. The auto-generated XDR routines in libc/yp are also used. The database access code has been broken out into a seperate module so that other NIS utilities (ypxfr in particular) can use it. Note that the old mknetid script is being temporarily moved here; it will be replaced by an mknetid program which will eventually have a home under /usr/src/libexec. (The existing script is actually somewhat broken -- it doesn't handle hosts -- but this isn't a big deal at this point since the netid.byname map is really only useful fopr Secure RPC, which we don't have yet.)
1995-12-16 20:54:17 +00:00
*
Performance enhancements (I hope) and new stuff: yp_dblookup.c: - Implement database handle caching. What this means is that instead of opening and closing map databases for each request, we open a database and save the handle (and, if requested, the key index) in an array. This saves a bit of overhead on things like repeated YPPROC_NEXT calls, such as you'd get from getpwent(). Normally, each YPPROC_NEXT would require open()ing the database, seeking to the location supplied by the caller (which is time consuming with hash databases as the R_CURSOR flag doesn't work), reading the data, close()ing the database and then shipping the data off to the caller. The system call overhead is prohibitive, especially with very large maps. By caching the handle to an open database, we elimitate at least the open()/close() system calls, as well as the associated DB setup and tear-down operations, for a large percentage of the time. This improves performance substantially at the cost of consuming a little more memory than before. Note that all the caching support is surrounded by #ifdef DB_CACHE so that this same source module can still be used by other programs that don't need it. - Make yp_open_db() call yp_validdomain(). Doing it here saves cycles when caching is enabled since a hit on the map cache list by definition means that the domain being referenced is valid. - Also make yp_open_db() check for exhaustion of file descriptors, just in case. yp_server.c: - Reorganize things a little to take advantage of the database handle caching. Add a call to yp_flush_all() in ypproc_clear_2_svc(). - Remove calls to yp_validdomain() from some of the service procedures. yp_validdomain() is called inside yp_open_db() now, so procedures that call into the database package don't need to use yp_validdomain() themselves. - Fix a bogosity in ypproc_maplist_2_svc(): don't summarily initiallize the result.maps pointer to NULL. This causes yp_maplist_free() to fail and leaks memory. - Make ypproc_master_2_svc() copy the string it gets from the database package into a private static buffer before trying to NUL terminate it. This is necessary with the DB handle caching: stuffing a NUL into the data returned by DB package will goof it up internally. yp_main.c: - Stuff for DB handle caching: call yp_init_dbs() to clear the handle array and add call to yp_flush_all() to the SIGHUP signal handler. Makefile.yp: - Reorganize to deal with database caching. yp_mkdb(8) can now be used to send a YPPROC_CLEAR signal to ypserv(8). Call it after each map is created to refresh ypserv's cache. - Add support for mail.alias map. Contributed by Mike Murphy (mrm@sceard.com). - Make default location for the netgroups source file be /var/yp/netgroup instead of /etc/netgroup. mkaliases: - New file: script to generate mail.alias map. Contributed by Mike Murphy (mrm@sceard.com). Makefile: - Install Makefile.yp as /var/yp/Makefile.dist and link it to /var/yp/Makefile only if /var/yp/Makefile doesn't already exist. Suggested by Peter Wemm. - Install new mkaliases script in /usr/libexec along with mknetid. - Use somewhat saner approach to generating rpcgen-dependent files as suggested by Garrett Wollman.
1996-04-28 04:38:52 +00:00
* The yp_validdomain() function checks the domain specified by the caller
Import the new, non-GPL ypserv, written by yours truly. Functionally equivalent to the old ypserv, except that it doesn't support the -p [port] option to force the server to use a particular port. The server stubs and yp.h header file are auto-generated from the yp.x protocol definition file. The auto-generated XDR routines in libc/yp are also used. The database access code has been broken out into a seperate module so that other NIS utilities (ypxfr in particular) can use it. Note that the old mknetid script is being temporarily moved here; it will be replaced by an mknetid program which will eventually have a home under /usr/src/libexec. (The existing script is actually somewhat broken -- it doesn't handle hosts -- but this isn't a big deal at this point since the netid.byname map is really only useful fopr Secure RPC, which we don't have yet.)
1995-12-16 20:54:17 +00:00
* to make sure it's actually served by this server. This is more a sanity
* check than an a security check, but this seems to be the best place for
* it.
*/
int yp_access(map, rqstp)
const char *map;
const struct svc_req *rqstp;
{
struct sockaddr_in *rqhost;
int status = 0;
Small touch-ups -- no functional changes. Fix some comments to reflect reality (in some cases I made changes to code but not to the comments). Change some instances of 'inline' to '__inline' to pacify gcc -ansi -pedantic. Use rcsid strings more consistently. Make 'oldaddr' static in yp_access(). Use strcpy()/strcat() in yp_open_db_cache() instead of snprintf(). (Seems to be a little faster this way.)
1996-05-31 16:01:51 +00:00
static unsigned long oldaddr = 0;
Add real securenets support. By default, ypserv now uses /var/yp/securenets in the same was as the SunOS ypserv (same format, described in ypserv man page). If the user wants tcpwrapper style access control, they can recompile ypserv to use that instead. This way we get securenets without having to ship libwrap.a and tcpd.h with core FreeBSD distribution. If /var/yp/securenets doesn't exist, ypserv allows all connections.
1996-02-24 22:01:48 +00:00
#ifndef TCP_WRAPPER
struct securenet *tmp;
Import the new, non-GPL ypserv, written by yours truly. Functionally equivalent to the old ypserv, except that it doesn't support the -p [port] option to force the server to use a particular port. The server stubs and yp.h header file are auto-generated from the yp.x protocol definition file. The auto-generated XDR routines in libc/yp are also used. The database access code has been broken out into a seperate module so that other NIS utilities (ypxfr in particular) can use it. Note that the old mknetid script is being temporarily moved here; it will be replaced by an mknetid program which will eventually have a home under /usr/src/libexec. (The existing script is actually somewhat broken -- it doesn't handle hosts -- but this isn't a big deal at this point since the netid.byname map is really only useful fopr Secure RPC, which we don't have yet.)
1995-12-16 20:54:17 +00:00
#endif
Add support for NIS v1 client procedures. The following procedures are currently implemented: YPOLDPROC_NULL YPOLDPROC_DOMAIN YPOLDPROC_DOMAIN_NONACK YPOLDPROC_FIRST YPOLDPROC_NEXT YPOLDPROC_MATCH YPOLDPROC_POLL These are all implemented as wrappers around their v2 counterparts. The YPOLDPROC_PUSH, PULL and GET procedures are not implemented since a) I couldn't figure out exactly what to have them do, and b) I suspect they're used for doing map transfers between master and slave servers, which we already do using the v2 protocol anyway. This means we can server NIS v1 clients but can't be a master or slave with NIS v1-only servers. I think I'll get over it. :) The -k (sunos_4_kludge) flag and associated code has been removed since it is no longer needed. Also tweaked yp_access() to handle both sets of procedures and updated the man page.
1996-02-26 02:34:27 +00:00
char *yp_procedure = NULL;
Makefile.yp: - Add a 'pushpw' target that only yppushes the various passwd maps and sends a YPPROC_CLEAR to the local ypserv. This will be used by rpc.yppasswdd once I merge in the in-place update changes. yp_access.c: - Make the yp_access() function print RPC program and procedure numbers that it doesn't know about in literal form. This will allow it to work with other prgrams that it doesn't know about, like rpc.ypxfrd I'm going to import shortly. yp_dblookup.c: - Take out the __inline keywords. They weren't really helping me anyway. - Somehow I broke yp_next() when DB_CACHE wasn't #defined. Fix it. - Also fix potential case where yp_next() might loop forever; make sure it checks the return values of all the (dbp->seq)()/R_NEXT calls that it does as well as comparing keys.
1996-06-05 02:01:31 +00:00
char procbuf[50];
if (rqstp->rq_prog != YPPASSWDPROG && rqstp->rq_prog != YPPROG) {
snprintf(procbuf, sizeof(procbuf), "#%lu/#%lu", rqstp->rq_prog,
rqstp->rq_proc);
yp_procedure = (char *)&procbuf;
} else {
yp_procedure = rqstp->rq_prog == YPPASSWDPROG ?
"yppasswdprog_update" :
yp_procs[rqstp->rq_proc + (12 * (rqstp->rq_vers - 1))];
}
Import the new, non-GPL ypserv, written by yours truly. Functionally equivalent to the old ypserv, except that it doesn't support the -p [port] option to force the server to use a particular port. The server stubs and yp.h header file are auto-generated from the yp.x protocol definition file. The auto-generated XDR routines in libc/yp are also used. The database access code has been broken out into a seperate module so that other NIS utilities (ypxfr in particular) can use it. Note that the old mknetid script is being temporarily moved here; it will be replaced by an mknetid program which will eventually have a home under /usr/src/libexec. (The existing script is actually somewhat broken -- it doesn't handle hosts -- but this isn't a big deal at this point since the netid.byname map is really only useful fopr Secure RPC, which we don't have yet.)
1995-12-16 20:54:17 +00:00
rqhost = svc_getcaller(rqstp->rq_xprt);
if (debug) {
Add support for NIS v1 client procedures. The following procedures are currently implemented: YPOLDPROC_NULL YPOLDPROC_DOMAIN YPOLDPROC_DOMAIN_NONACK YPOLDPROC_FIRST YPOLDPROC_NEXT YPOLDPROC_MATCH YPOLDPROC_POLL These are all implemented as wrappers around their v2 counterparts. The YPOLDPROC_PUSH, PULL and GET procedures are not implemented since a) I couldn't figure out exactly what to have them do, and b) I suspect they're used for doing map transfers between master and slave servers, which we already do using the v2 protocol anyway. This means we can server NIS v1 clients but can't be a master or slave with NIS v1-only servers. I think I'll get over it. :) The -k (sunos_4_kludge) flag and associated code has been removed since it is no longer needed. Also tweaked yp_access() to handle both sets of procedures and updated the man page.
1996-02-26 02:34:27 +00:00
yp_error("Procedure %s called from %s:%d", yp_procedure,
inet_ntoa(rqhost->sin_addr),
Import the new, non-GPL ypserv, written by yours truly. Functionally equivalent to the old ypserv, except that it doesn't support the -p [port] option to force the server to use a particular port. The server stubs and yp.h header file are auto-generated from the yp.x protocol definition file. The auto-generated XDR routines in libc/yp are also used. The database access code has been broken out into a seperate module so that other NIS utilities (ypxfr in particular) can use it. Note that the old mknetid script is being temporarily moved here; it will be replaced by an mknetid program which will eventually have a home under /usr/src/libexec. (The existing script is actually somewhat broken -- it doesn't handle hosts -- but this isn't a big deal at this point since the netid.byname map is really only useful fopr Secure RPC, which we don't have yet.)
1995-12-16 20:54:17 +00:00
ntohs(rqhost->sin_port));
if (map != NULL)
yp_error("Client is referencing map \"%s\".", map);
}
/* Check the map name if one was supplied. */
if (map != NULL) {
Close a potential security hole: if yp_access() is passed a map name, have it check to see that it doesn't contain any '/' characters. This prevents possible silliness like ypcat "../../../kernel". We already test the domain name for this in yp_validdomain(), and ypserv itself tests the map name in yp_open_db(), but it doesn't hurt to be paranoid and test for it in the generic access routine too. rpc.ypxfrd does not test the map name for slashes, but it does call yp_access() with the map name, so this removes a potential vulnerability from there. Also make the tests for IPPORT_RESERVED a little more selective: make sure it trips when map == master.passwd.*, prog == YPPROC and proc == YPPROC_XFR, and prog == YPXFRD_FREEBSD_PROG and proc == YPXFRD_GETMAP. Also use IPPORT_RESERVED instead of hard-coded value.
1996-09-30 22:27:00 +00:00
if (strchr(map, '/')) {
yp_error("embedded slash in map name \"%s\" -- \
possible spoof attempt from %s:%d",
map, inet_ntoa(rqhost->sin_addr),
ntohs(rqhost->sin_port));
}
Add real securenets support. By default, ypserv now uses /var/yp/securenets in the same was as the SunOS ypserv (same format, described in ypserv man page). If the user wants tcpwrapper style access control, they can recompile ypserv to use that instead. This way we get securenets without having to ship libwrap.a and tcpd.h with core FreeBSD distribution. If /var/yp/securenets doesn't exist, ypserv allows all connections.
1996-02-24 22:01:48 +00:00
if ((strstr(map, "master.passwd.") ||
Close a potential security hole: if yp_access() is passed a map name, have it check to see that it doesn't contain any '/' characters. This prevents possible silliness like ypcat "../../../kernel". We already test the domain name for this in yp_validdomain(), and ypserv itself tests the map name in yp_open_db(), but it doesn't hurt to be paranoid and test for it in the generic access routine too. rpc.ypxfrd does not test the map name for slashes, but it does call yp_access() with the map name, so this removes a potential vulnerability from there. Also make the tests for IPPORT_RESERVED a little more selective: make sure it trips when map == master.passwd.*, prog == YPPROC and proc == YPPROC_XFR, and prog == YPXFRD_FREEBSD_PROG and proc == YPXFRD_GETMAP. Also use IPPORT_RESERVED instead of hard-coded value.
1996-09-30 22:27:00 +00:00
(rqstp->rq_prog == YPPROG &&
rqstp->rq_proc == YPPROC_XFR) ||
(rqstp->rq_prog == YPXFRD_FREEBSD_PROG &&
rqstp->rq_proc == YPXFRD_GETMAP)) &&
ntohs(rqhost->sin_port) >= IPPORT_RESERVED) {
yp_error("Access to %s denied -- client %s:%d \
not privileged", map, inet_ntoa(rqhost->sin_addr), ntohs(rqhost->sin_port));
Import the new, non-GPL ypserv, written by yours truly. Functionally equivalent to the old ypserv, except that it doesn't support the -p [port] option to force the server to use a particular port. The server stubs and yp.h header file are auto-generated from the yp.x protocol definition file. The auto-generated XDR routines in libc/yp are also used. The database access code has been broken out into a seperate module so that other NIS utilities (ypxfr in particular) can use it. Note that the old mknetid script is being temporarily moved here; it will be replaced by an mknetid program which will eventually have a home under /usr/src/libexec. (The existing script is actually somewhat broken -- it doesn't handle hosts -- but this isn't a big deal at this point since the netid.byname map is really only useful fopr Secure RPC, which we don't have yet.)
1995-12-16 20:54:17 +00:00
return(1);
}
}
#ifdef TCP_WRAPPER
status = hosts_ctl(progname, STRING_UNKNOWN,
Add real securenets support. By default, ypserv now uses /var/yp/securenets in the same was as the SunOS ypserv (same format, described in ypserv man page). If the user wants tcpwrapper style access control, they can recompile ypserv to use that instead. This way we get securenets without having to ship libwrap.a and tcpd.h with core FreeBSD distribution. If /var/yp/securenets doesn't exist, ypserv allows all connections.
1996-02-24 22:01:48 +00:00
inet_ntoa(rqhost->sin_addr), "");
#else
tmp = securenets;
while(tmp) {
if (((rqhost->sin_addr.s_addr & ~tmp->mask.s_addr)
| tmp->net.s_addr) == rqhost->sin_addr.s_addr) {
status = 1;
break;
}
tmp = tmp->next;
}
#endif
Import the new, non-GPL ypserv, written by yours truly. Functionally equivalent to the old ypserv, except that it doesn't support the -p [port] option to force the server to use a particular port. The server stubs and yp.h header file are auto-generated from the yp.x protocol definition file. The auto-generated XDR routines in libc/yp are also used. The database access code has been broken out into a seperate module so that other NIS utilities (ypxfr in particular) can use it. Note that the old mknetid script is being temporarily moved here; it will be replaced by an mknetid program which will eventually have a home under /usr/src/libexec. (The existing script is actually somewhat broken -- it doesn't handle hosts -- but this isn't a big deal at this point since the netid.byname map is really only useful fopr Secure RPC, which we don't have yet.)
1995-12-16 20:54:17 +00:00
Add real securenets support. By default, ypserv now uses /var/yp/securenets in the same was as the SunOS ypserv (same format, described in ypserv man page). If the user wants tcpwrapper style access control, they can recompile ypserv to use that instead. This way we get securenets without having to ship libwrap.a and tcpd.h with core FreeBSD distribution. If /var/yp/securenets doesn't exist, ypserv allows all connections.
1996-02-24 22:01:48 +00:00
if (!status) {
if (rqhost->sin_addr.s_addr != oldaddr) {
yp_error("connect from %s:%d to procedure %s refused",
inet_ntoa(rqhost->sin_addr),
ntohs(rqhost->sin_port),
Add support for NIS v1 client procedures. The following procedures are currently implemented: YPOLDPROC_NULL YPOLDPROC_DOMAIN YPOLDPROC_DOMAIN_NONACK YPOLDPROC_FIRST YPOLDPROC_NEXT YPOLDPROC_MATCH YPOLDPROC_POLL These are all implemented as wrappers around their v2 counterparts. The YPOLDPROC_PUSH, PULL and GET procedures are not implemented since a) I couldn't figure out exactly what to have them do, and b) I suspect they're used for doing map transfers between master and slave servers, which we already do using the v2 protocol anyway. This means we can server NIS v1 clients but can't be a master or slave with NIS v1-only servers. I think I'll get over it. :) The -k (sunos_4_kludge) flag and associated code has been removed since it is no longer needed. Also tweaked yp_access() to handle both sets of procedures and updated the man page.
1996-02-26 02:34:27 +00:00
yp_procedure);
Add real securenets support. By default, ypserv now uses /var/yp/securenets in the same was as the SunOS ypserv (same format, described in ypserv man page). If the user wants tcpwrapper style access control, they can recompile ypserv to use that instead. This way we get securenets without having to ship libwrap.a and tcpd.h with core FreeBSD distribution. If /var/yp/securenets doesn't exist, ypserv allows all connections.
1996-02-24 22:01:48 +00:00
oldaddr = rqhost->sin_addr.s_addr;
}
Import the new, non-GPL ypserv, written by yours truly. Functionally equivalent to the old ypserv, except that it doesn't support the -p [port] option to force the server to use a particular port. The server stubs and yp.h header file are auto-generated from the yp.x protocol definition file. The auto-generated XDR routines in libc/yp are also used. The database access code has been broken out into a seperate module so that other NIS utilities (ypxfr in particular) can use it. Note that the old mknetid script is being temporarily moved here; it will be replaced by an mknetid program which will eventually have a home under /usr/src/libexec. (The existing script is actually somewhat broken -- it doesn't handle hosts -- but this isn't a big deal at this point since the netid.byname map is really only useful fopr Secure RPC, which we don't have yet.)
1995-12-16 20:54:17 +00:00
return(1);
}
return(0);
}
int yp_validdomain(domain)
const char *domain;
{
struct stat statbuf;
char dompath[MAXPATHLEN + 2];
if (domain == NULL || strstr(domain, "binding") ||
!strcmp(domain, ".") || !strcmp(domain, "..") ||
Add real securenets support. By default, ypserv now uses /var/yp/securenets in the same was as the SunOS ypserv (same format, described in ypserv man page). If the user wants tcpwrapper style access control, they can recompile ypserv to use that instead. This way we get securenets without having to ship libwrap.a and tcpd.h with core FreeBSD distribution. If /var/yp/securenets doesn't exist, ypserv allows all connections.
1996-02-24 22:01:48 +00:00
strchr(domain, '/') || strlen(domain) > YPMAXDOMAIN)
Import the new, non-GPL ypserv, written by yours truly. Functionally equivalent to the old ypserv, except that it doesn't support the -p [port] option to force the server to use a particular port. The server stubs and yp.h header file are auto-generated from the yp.x protocol definition file. The auto-generated XDR routines in libc/yp are also used. The database access code has been broken out into a seperate module so that other NIS utilities (ypxfr in particular) can use it. Note that the old mknetid script is being temporarily moved here; it will be replaced by an mknetid program which will eventually have a home under /usr/src/libexec. (The existing script is actually somewhat broken -- it doesn't handle hosts -- but this isn't a big deal at this point since the netid.byname map is really only useful fopr Secure RPC, which we don't have yet.)
1995-12-16 20:54:17 +00:00
return(1);
snprintf(dompath, sizeof(dompath), "%s/%s", yp_dir, domain);
if (stat(dompath, &statbuf) < 0 || !S_ISDIR(statbuf.st_mode))
return(1);
Performance enhancements (I hope) and new stuff: yp_dblookup.c: - Implement database handle caching. What this means is that instead of opening and closing map databases for each request, we open a database and save the handle (and, if requested, the key index) in an array. This saves a bit of overhead on things like repeated YPPROC_NEXT calls, such as you'd get from getpwent(). Normally, each YPPROC_NEXT would require open()ing the database, seeking to the location supplied by the caller (which is time consuming with hash databases as the R_CURSOR flag doesn't work), reading the data, close()ing the database and then shipping the data off to the caller. The system call overhead is prohibitive, especially with very large maps. By caching the handle to an open database, we elimitate at least the open()/close() system calls, as well as the associated DB setup and tear-down operations, for a large percentage of the time. This improves performance substantially at the cost of consuming a little more memory than before. Note that all the caching support is surrounded by #ifdef DB_CACHE so that this same source module can still be used by other programs that don't need it. - Make yp_open_db() call yp_validdomain(). Doing it here saves cycles when caching is enabled since a hit on the map cache list by definition means that the domain being referenced is valid. - Also make yp_open_db() check for exhaustion of file descriptors, just in case. yp_server.c: - Reorganize things a little to take advantage of the database handle caching. Add a call to yp_flush_all() in ypproc_clear_2_svc(). - Remove calls to yp_validdomain() from some of the service procedures. yp_validdomain() is called inside yp_open_db() now, so procedures that call into the database package don't need to use yp_validdomain() themselves. - Fix a bogosity in ypproc_maplist_2_svc(): don't summarily initiallize the result.maps pointer to NULL. This causes yp_maplist_free() to fail and leaks memory. - Make ypproc_master_2_svc() copy the string it gets from the database package into a private static buffer before trying to NUL terminate it. This is necessary with the DB handle caching: stuffing a NUL into the data returned by DB package will goof it up internally. yp_main.c: - Stuff for DB handle caching: call yp_init_dbs() to clear the handle array and add call to yp_flush_all() to the SIGHUP signal handler. Makefile.yp: - Reorganize to deal with database caching. yp_mkdb(8) can now be used to send a YPPROC_CLEAR signal to ypserv(8). Call it after each map is created to refresh ypserv's cache. - Add support for mail.alias map. Contributed by Mike Murphy (mrm@sceard.com). - Make default location for the netgroups source file be /var/yp/netgroup instead of /etc/netgroup. mkaliases: - New file: script to generate mail.alias map. Contributed by Mike Murphy (mrm@sceard.com). Makefile: - Install Makefile.yp as /var/yp/Makefile.dist and link it to /var/yp/Makefile only if /var/yp/Makefile doesn't already exist. Suggested by Peter Wemm. - Install new mkaliases script in /usr/libexec along with mknetid. - Use somewhat saner approach to generating rpcgen-dependent files as suggested by Garrett Wollman.
1996-04-28 04:38:52 +00:00
Import the new, non-GPL ypserv, written by yours truly. Functionally equivalent to the old ypserv, except that it doesn't support the -p [port] option to force the server to use a particular port. The server stubs and yp.h header file are auto-generated from the yp.x protocol definition file. The auto-generated XDR routines in libc/yp are also used. The database access code has been broken out into a seperate module so that other NIS utilities (ypxfr in particular) can use it. Note that the old mknetid script is being temporarily moved here; it will be replaced by an mknetid program which will eventually have a home under /usr/src/libexec. (The existing script is actually somewhat broken -- it doesn't handle hosts -- but this isn't a big deal at this point since the netid.byname map is really only useful fopr Secure RPC, which we don't have yet.)
1995-12-16 20:54:17 +00:00
return(0);
}
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