Date: Sun, 22 Nov 1998 20:52:46 +0000 From: dmlb@ragnet.demon.co.uk To: FreeBSD-gnats-submit@FreeBSD.ORG Cc: dmlb@ragnet.demon.co.uk Subject: kern/8798: Patches to make mount_portal work. Message-ID: <E0zhgUw-0000CB-00@ragnet.demon.co.uk>
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>Number: 8798
>Category: kern
>Synopsis: Bug to to portal code.
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Sun Nov 22 13:10:01 PST 1998
>Last-Modified:
>Originator: Duncan Barclay
>Organization:
>Release: FreeBSD 3.0-CURRENT i386
>Environment:
-current
>Description:
mount_portal is broken, when run and an attempt is made to
open a socket with
$ cat /p/tcp/localhost/daytime
an error will occur. This is due to bugs in the call to sendmsg
in send_reply(), activate.c.
There is also a security issue in pt_tcp.c and opening
privilaged ports. I think the whole code is bogus but will
submit another pr dealing with it.
>How-To-Repeat:
$ mount_portal /etc/portal.conf /p
$ cat /p/tcp/localhost/daytime
Nov 22 11:07:54 computer portald[4459]: send: Invalid argument
>Fix:
Patches included below, diff'd against current CVSup'd 06:30 22/11/98.
They may not link as I haven't included pt_tcplisten.c in this
pr. Will be following.
Index: Makefile
===================================================================
RCS file: /ide0.e/ncvs/src/sbin/mount_portal/Makefile,v
retrieving revision 1.8
diff -u -r1.8 Makefile
--- Makefile 1998/01/20 10:40:04 1.8
+++ Makefile 1998/11/22 16:59:32
@@ -3,7 +3,7 @@
PROG= mount_portal
SRCS= mount_portal.c activate.c conf.c getmntopts.c pt_conf.c \
- pt_exec.c pt_file.c pt_tcp.c
+ pt_exec.c pt_file.c pt_tcp.c
MAN8= mount_portal.8
MOUNT= ${.CURDIR}/../mount
Index: activate.c
===================================================================
RCS file: /ide0.e/ncvs/src/sbin/mount_portal/activate.c,v
retrieving revision 1.5
diff -u -r1.5 activate.c
--- activate.c 1998/07/06 07:19:23 1.5
+++ activate.c 1998/11/22 20:40:05
@@ -45,6 +45,9 @@
#include <errno.h>
#include <string.h>
#include <unistd.h>
+#ifdef DEBUG
+#include <stdio.h>
+#endif /* DEBUG */
#include <sys/types.h>
#include <sys/param.h>
#include <sys/socket.h>
@@ -111,7 +114,7 @@
int error;
{
int n;
- struct iovec iov;
+ struct iovec iov[1];
struct msghdr msg;
struct {
struct cmsghdr cmsg;
@@ -122,15 +125,17 @@
* Line up error code. Don't worry about byte ordering
* because we must be sending to the local machine.
*/
- iov.iov_base = (caddr_t) &error;
- iov.iov_len = sizeof(error);
+ iov[0].iov_base = (caddr_t) &error;
+ iov[0].iov_len = sizeof(error);
/*
* Build a msghdr
*/
memset(&msg, 0, sizeof(msg));
- msg.msg_iov = &iov;
+ msg.msg_iov = iov;
msg.msg_iovlen = 1;
+ msg.msg_name = NULL;
+ msg.msg_namelen = 0;
/*
* If there is a file descriptor to send then
@@ -148,7 +153,7 @@
/*
* Send to kernel...
*/
- if ((n = sendmsg(so, &msg, MSG_EOR)) < 0)
+ if ((n = sendmsg(so, &msg, 0)) < 0)
syslog(LOG_ERR, "send: %s", strerror(errno));
#ifdef DEBUG
fprintf(stderr, "sent %d bytes\n", n);
@@ -206,6 +211,10 @@
error = ENOENT;
}
+#ifdef DEBUG
+ fprintf(stderr, "returning fd = %d\n", fd);
+ fprintf(stderr, " error = %d [%s]\n", error, strerror(error));
+#endif DEBUG
if (error >= 0)
send_reply(so, fd, error);
Index: mount_portal.8
===================================================================
RCS file: /ide0.e/ncvs/src/sbin/mount_portal/mount_portal.8,v
retrieving revision 1.3
diff -u -r1.3 mount_portal.8
--- mount_portal.8 1998/07/06 07:19:25 1.3
+++ mount_portal.8 1998/11/22 17:05:05
@@ -89,11 +89,22 @@
By convention, the portal daemon divides the namespace into sub-namespaces,
each of which handles objects of a particular type.
.Pp
-Currently, two sub-namespaces are implemented:
+Currently, three sub-namespaces are implemented:
+.Pa tcplisten ,
.Pa tcp
and
.Pa fs .
The
+.Pa tcplisten
+namespace takes a slash separated hostname and port and creates a TCP/IP
+socket bound to the given hostname-port pair. The hostname may be
+specified as "ANY" to allow any other host to connect to the socket. A
+port number of 0 will dynamically allocate a port, this can be
+discovered by calling
+.Xr getsockname 8
+with the returned file descriptor. Privilaged ports can only be bound to
+by the super-user.
+The
.Pa tcp
namespace takes a hostname and a port (slash separated) and
creates an open TCP/IP connection.
@@ -116,6 +127,7 @@
Subsequent fields are passed to the creation function.
.Bd -literal
# @(#)portal.conf 5.1 (Berkeley) 7/13/92
+tcplisten/ tcplisten tcplisten/
tcp/ tcp tcp/
fs/ file fs/
.Ed
Index: mount_portal.c
===================================================================
RCS file: /ide0.e/ncvs/src/sbin/mount_portal/mount_portal.c,v
retrieving revision 1.13
diff -u -r1.13 mount_portal.c
--- mount_portal.c 1998/07/06 07:19:25 1.13
+++ mount_portal.c 1998/11/22 17:05:53
@@ -190,7 +190,9 @@
/*
* Everything is ready to go - now is a good time to fork
*/
+#ifndef DEBUG
daemon(0, 0);
+#endif
/*
* Start logging (and change name)
Index: portald.h
===================================================================
RCS file: /ide0.e/ncvs/src/sbin/mount_portal/portald.h,v
retrieving revision 1.3
diff -u -r1.3 portald.h
--- portald.h 1997/02/22 14:32:55 1.3
+++ portald.h 1998/11/22 17:06:52
@@ -73,6 +73,8 @@
char *key, char **v, int so, int *fdp));
extern int portal_tcp __P((struct portal_cred *,
char *key, char **v, int so, int *fdp));
+extern int portal_tcplisten __P((struct portal_cred *,
+ char *key, char **v, int so, int *fdp));
/*
* Global functions
Index: pt_conf.c
===================================================================
RCS file: /ide0.e/ncvs/src/sbin/mount_portal/pt_conf.c,v
retrieving revision 1.4
diff -u -r1.4 pt_conf.c
--- pt_conf.c 1998/07/06 07:19:25 1.4
+++ pt_conf.c 1998/11/22 17:07:19
@@ -50,5 +50,6 @@
{ "exec", portal_exec },
{ "file", portal_file },
{ "tcp", portal_tcp },
+ { "tcplisten", portal_tcplisten },
{ 0, 0 }
};
Index: pt_file.c
===================================================================
RCS file: /ide0.e/ncvs/src/sbin/mount_portal/pt_file.c,v
retrieving revision 1.7
diff -u -r1.7 pt_file.c
--- pt_file.c 1998/07/06 07:19:26 1.7
+++ pt_file.c 1998/11/22 20:39:51
@@ -46,6 +46,9 @@
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
+#ifdef DEBUG
+#include <stdio.h>
+#endif /* DEBUG */
#include <sys/types.h>
#include <sys/param.h>
#include <sys/syslog.h>
Index: pt_tcp.c
===================================================================
RCS file: /ide0.e/ncvs/src/sbin/mount_portal/pt_tcp.c,v
retrieving revision 1.7
diff -u -r1.7 pt_tcp.c
--- pt_tcp.c 1998/07/06 07:19:27 1.7
+++ pt_tcp.c 1998/11/22 17:08:14
@@ -124,9 +124,9 @@
#endif
sp = getservbyname(port, "tcp");
- if (sp != NULL)
+ if (sp != NULL) {
s_port = (u_short)sp->s_port;
- else {
+ } else {
s_port = strtoul(port, &p, 0);
if (s_port == 0 || *p != '\0')
return (EINVAL);
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