ODBC with TCPS listener

Hi, I am using an Oracle 9i server with a TCPS (SSL-encrypted TCP/IP) listener. I can't seem to get ODBC clients working with this listener.
I can successfully use this TCPS listener with all of the regular Oracle clients (SQLplus, Enterprise Mgr, etc.)
I can successfully use ODBC with the TCP (non-encrypted) listener.
When I try to connect with ODBC over TCPS (e.g. to import data into Excel), the connection freezes. Has anybody else ever successfully used the encrypted listener in this way?
Here are my particulars:
Database server: 9.2.0.4 on Linux
Database client: 9.2.0.4 (both Oracle Client and ODBC driver) on Windows XP
Any help appreciated!!
--Andy Stevens
New York, NY

yes the TCPS listener is part of Oracle Advanced Security.
--andy

Similar Messages

Wrong remote port number with TCP listener

Hi
I am sending data from a dsp with a network card over TCP/IP to my pc running labview7express. The data is received correctly, I use a 'TCP create listener' followed by a 'TCP wait on listener' to establish the connection, followed by a while loop with 'TCP read' in it.
The port returned by 'TCP create listener' is correct (1001), but somehow 'TCP wait on listener' returns 57345 as remote port!?
Also when using another port eg 1003 it still returns 57345..
Anyone knows how this erroneous portnumber is achieved?

stino wrote:
> Hi
> I am sending data from a dsp with a network card over TCP/IP to my pc
> running labview7express. The data is received correctly, I use a 'TCP
> create listener' followed by a 'TCP wait on listener' to establish the
> connection, followed by a while loop with 'TCP read' in it.
> The port returned by 'TCP create listener' is correct (1001), but
> somehow 'TCP wait on listener' returns 57345 as remote port!?
> Also when using another port eg 1003 it still returns 57345..
> Anyone knows how this erroneous portnumber is achieved?
Nothing wrong with that. A TCP/IP connection has ALWAYS two connection
ends with each of them using a port number. 1001 is the port of the
local listen socket (which needs to be fixed so that clients can connect
to a know
n server) in your LabVIEW application. 57345 is the port number
used by your software running on your DSP board. A client usually has no
fixed port number but allocates any port number not already in use. When
the listen socket receives a connection request it connects and passes
the connection with the local port 1001 and the remote port 57345
through TCP Wait On Listener to your application. Since you set up the
Listen Socket in Create Listener you already know its port number so TCP
Wait on Listener does only return the port number of the remote
connection end of your connection.
Rolf Kalbermatter
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions

Error 11 with TCP Listen.vi and named service

I am using TCP Listen.vi with a named service so my Real-Time application can act as a TCP server without the clients needing to know the specific port. I am using LabVIEW 8.5.
I am getting Error 11 from TCP Listen.vi if no client has connected within a certain amount of time. I have traced the problem down to the TCP Listen Internal List.vi inside Internecine Avoider.vi in TCP Listen.vi. I think I have found a bug in this vi.
What is happening is that the Search function of TCP Listen Internal List.vi is not finding the named service, so new listeners continue to be created until there are too many open. See the attached picture. I think the circled function should be "not equal" instead of "equal".
Has anyone run across this problem before?
Thanks,
Cherie
Attachments:
TCP Listen.PNG ‏39 KB

Cherie,
Let us assume that al listener for your port number and name is not yet created and you have put the TCP Listen in a loop.
1st Iteration:
Searching the internal list will not find a name or port and hence it will create a connection and if successful will insert the port number and name to Internal List.
2nd Iteration onwards:
It will find the previous connection, provided you are still passing the same port number. If in the second iteration the port number changes, then what you say may happen
Will it be possible for you to post the TCP VI you have in RT?
That said...I don't get why that compare with zero is required? If port number was 0 in the first iteration then anyway after creating the listener, the new port number will be updated to the list along with the service name, isn't it?
Message Edited by kikiduu on 09-06-2008 08:50 AM
"A VI inside a Class is worth hundreds in the bush"
യവന്‍ പുലിയാണു കേട്ടാ!!!

TCP Listener returned error on accept = AFP blows up. Need help

Environment: 10.6.7 Server. Xserver. All Mac clients. It's a school. Problem: AFP refusing connections or not loading the Home Directory Symptoms: Library/Logs/AppleFileService/AppleFileServiceError.log blown out with "TCP Listener returned error on accept" happening every second.
I cannot figure this out. The server has not been updated recently. -checkhostname returns no error. There have been some new iMacs (10.6.8) connected recently. I have read this might be MaxThreads; or corrupt .DS files, but I am really struggling. Please - any clues at all? I can't keep rebooting every day. Any ideas at all please.

hi pkmusic, we are having the same problem. do you have phone over IP? we are using 5 servers (10.6.7 and 10.6.8) for user home directories. network goes through Siemens IP-Phones. Each server has max. 40 - 50 users but the error occures even if there are only 15 - 20 users connected. have to check the MaxThread-Settings next week ...

What's wrong with my listener.ora?

Hello.
I must say I've never understood how listener.ora works (it used to work but someone modified it), but by now it'd be enough to know what's wrong with this:
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC2))
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = zippo)(PORT = 1522))
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(GLOBAL_DBNAME = CSR2)
(ORACLE_HOME = /opt/oracle/product/9.2.0)
(SID_NAME = CSR2)
My problem is that when I try to connect from my PC "sqlplus csr_admin@csr2/csr" I get "ERROR: ORA-12154: TNS: could not resolve service name"
This is my entry in my local tnsnames.ora:
CSR2.world =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = zippo)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = CSR2)
An this, the entry in the entntry at the server's tnsnames.ora:
CSR2 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = zippo)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = CSR2)
Release 9.2.0.3.0
Thanks in advance.

It's funny but the date I posted this topic isn't OK (more than 3 years ago)

TCP Listen vi does not work in Labview RT 7.0

I'm trying to use a TCP Listener to accept connections from another PC on the local network.
When running the program with Labview 7.0 all works fine and I'm able to receive IP packets from the remote PC.
However, when I run it in Labview RT 7.0, the TCP listener does not listen on the specified port.
Another issue - after running the program in Labview 7.0, and then trying to run it again with Labview RT 7.0, if the specified port
is the same, I get error 60: "The specified network address is currently in use."
I'd appreciate your help,
Alik

Hi alikm,
I am a little confused on what your set up is. When you say that you are running LabVIEW Real-Time, do you mean that you are running the program on a Real-Time target? How are you establishing that the project you are setting up is a Real-Time project?
Also, if you are trying to access one port at the same time using two systems, you will get an error that you are not able to do this, since you can only write to a single port once at a time.
Regards,
Stephen S.
National Instruments
Applications Engineering

XE is not registering with the listener

hi forum,
i installed oracle xe on an empty xp box. everything went smoothly but - like for so many others - my db homepage is not showing (http://127.0.0.1:8080/apex). but thats a different story.
i can connect with sqlplus, i can create, insert into and select from tables. tnsping is resolving localhost, xe, puss (my xp host name), 127.0.0.1 as well as the host ip (192.168.1.102).
my problem is that the db instance doesn't seem to register with the listener, so that when i do a sqlplus andy/passwd@XE i get the german version of what would be ORA-12514: TNS: Listener can't resolve service listed in connect discriptor
when i do a lsnrctl status i get the following:
LSNRCTL for 32-bit Windows: Version 10.2.0.1.0 - Production on 01-AUG-2010 11:53:26
Copyright (c) 1991, 2005, Oracle. All rights reserved.
Anmeldung bei (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC_FOR_XE)))
STATUS des LISTENER
Alias                     LISTENER
Version                   TNSLSNR for 32-bit Windows: Version 10.2.0.1.0 - Produ
ction
Startdatum                31-JUL-2010 22:52:37
Uptime                    0 Tage 13 Std. 0 Min. 48 Sek.
Trace-Ebene               off
Sicherheit                ON: Local OS Authentication
SNMP                      OFF
Standard-Service           XE
Parameterdatei des Listener C:\oraclexe\app\oracle\product\10.2.0\server\network\admin\listener.ora
Log-Datei des Listener    C:\oraclexe\app\oracle\product\10.2.0\server\network\log\listener.log
Zusammenfassung Listening-Endpunkte...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROC_FOR_XEipc)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=puss)(PORT=1521)))
Services Übersicht...
Dienst "CLRExtProc" hat 1 Instance(s).
Instance "CLRExtProc", Status UNKNOWN, hat 1 Handler für diesen Dienst...
Dienst "PLSExtProc" hat 1 Instance(s).
Instance "PLSExtProc", Status UNKNOWN, hat 1 Handler für diesen Dienst...
Der Befehl wurde erfolgreich ausgeführt.the german msgs say that everything is in order basically, but what is certainly not in order is that there is no XE listed.
show parameter local_listener; revealed: no local listener set.
alter system set local_listener=XE; or
alter system set local_listener='(address=(protocol=tcp)(host=puss)(port=1521))'; and then
alter system register; didn't make the instance show in listener status
i would at least expect to see the attempt to register in the listener.log but nothing.
when i added the host to SID_LIST in listener.ora the instance was listed in the listener status, but status remained unknown, what ever i tried.
i know that there are other threads dealing with the same issue, but none of the solutions provided worked for me.
i am in a home network with two other macs connected via wlan. my firewall is turned off. i've tryed every combination of tnsnames.ora and listener.ora settings but nothing worked. after 13 hours of trail and error, reading a lot, wiping the whole box and reinstalling everything from scratch, sitting in front of my vanilla xp plus oracle xe installation, i'm tyred. i need your help.
Andy
tnsnames.ora
XE =
(DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = puss)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = XE)
EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))
    (CONNECT_DATA =
      (SID = PLSExtProc)
      (PRESENTATION = RO)
ORACLR_CONNECTION_DATA =
(DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))
    (CONNECT_DATA =
      (SID = CLRExtProc)
      (PRESENTATION = RO)
listener.ora
SID_LIST_LISTENER =
(SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = C:\oraclexe\app\oracle\product\10.2.0\server)
      (PROGRAM = extproc)
    (SID_DESC =
      (SID_NAME = CLRExtProc)
      (ORACLE_HOME = C:\oraclexe\app\oracle\product\10.2.0\server)
      (PROGRAM = extproc)
LISTENER =
(DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))
      (ADDRESS = (PROTOCOL = TCP)(HOST = puss)(PORT = 1521))
DEFAULT_SERVICE_LISTENER = (XE)
sqlnet.ora
SQLNET.AUTHENTICATION_SERVICES = (NTS)

It turned out that the failing http://127.0.0.1:8080/apex actually was related.
After cutting the network connection and restarting the listener and the db everything worked fine, even the web admin interface.

Network Hotsync - Error Starting TCP Listen?

I've had no trouble using Network Hotsync in the past. Now whn I try to enable it using Hotsync Manager on the PC I get an error message: "Error Starting TCP Listen"
Everything looks fine in the SETUP dialog....as soon as I try to select "Network" in Hotsync Manager I get the error. I've had no problem with USB syncs.
Anybody ever seen this error message? ideas?
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I have the same error message. Did you ever find a solution?
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Services don't register with static listener

HI, no matter what configurations I do the static listener shows no services. Can you help me? Here is my listener.ora:
SID_LIST_LISTENER =
        (SID_LIST =
                (SID_DESC =
                        (GLOBAL_DBNAME=ELLISON9)
                        (ORACLE_HOME=/u01/app/oracle/product/11.2.0/dbhome_1)
                        (SID_NAME=ELLISON9)
LISTENER11G =
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      (ADDRESS = (PROTOCOL = TCP)(HOST = ora1)(PORT = 1522))
ADR_BASE_LISTENER = /u01/app/oracle
My tnsnames.ora:
ELLISON9 =
(DESCRIPTION =
        (ADDRESS = (PROTOCOL = TCP)(HOST = ora1)(PORT = 1522))
        (CONNECT_DATA =
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And my parameters in the database are:
service_names=ELLISON9
local_listener=' ';
STATUS of the LISTENER
Alias                     LISTENER11G
Version                   TNSLSNR for Linux: Version 11.2.0.3.0 - Production
Start Date                11-JUN-2013 10:07:09
Uptime                    0 days 0 hr. 0 min. 0 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora
Listener Log File         /u01/app/oracle/product/11.2.0/dbhome_1/log/diag/tnslsnr/ora1/listener11g/alert/log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=ora1)(PORT=1522)))
The listener supports no services
The command completed successfully
[oracle@ora1 admin]$ sqlplus sys/oracle@ora1:1522/ELLISON9 as sysdba
ERROR:
ORA-12514: TNS:listener does not currently know of service requested in connect
descriptor

XerXi wrote:
Isn't the local_listener parameter creating dynamic listener?
I already had a listener named LISTENER from another home and not to confuse both I decided to name it something else. But come to think of it, it wouldn't have been a problem to have 2 listeners with same names but different homes, correct?
No, no, and no.
No. The local_listener parameter doesn't create anything. It tells the database where to find the listener so that it can register itself with the listener. And it is only needed if the listener is not using the default port of 1521.
see: [url http://edstevensdba.wordpress.com/2011/07/30/exploring-the-local_listener-parameter/] exploring-the-local_listener-parameter [/url]
No, there is no such this as a 'dynamic listener'. There is dynamic registration with a listener. But there is no 'dynamic listener'. A listener is a listener is a listener.
I don't know if you can have two listeners with the same name running from two different homes or not. I've never been so insane as to try it. If it *is* possible, it would certainly be the most difficult to maintain multi-listener setup I can imagine.
One more time. Repeat after me. "One single listener with the default name of LISTENER and using the default port of 1521 was designed to support multiple databases of multiple versions running from multiple homes. Anything else is needless complexity."
Please tell us again what problem you thought you were solving by having multiple listeners ...
Message was edited by: EdStevens

Error in Create TCP Listener - Linux

Hi,
When using the Create TCP Listener function in Linux Red Hat 9.0, I get an error (ill-formet net address). What is strange is that I get this error only when running the VI (built as an executable) as a regular user. When I run it as root, no problem.
Any idea?
Thanks,
Alex

Hello Alex,
We've seen this issue before with Linux users (for example
http://forums.ni.com/ni/board/message?board.id=170&message.id=63457&requireLogin=False),
it seems as though you'll have to change some permissions in Linux if
you want to use TCP when not logged in as root.
Hope it helps-
Travis M
LabVIEW R&D
National Instruments

Tcp listen accepts multiple simultaneous connections even when closed

LV 6.0.2, win 2k
I am trying to set up a server that will recieve data from multiple clients. If I set up a TCP listen vi on the server, then I have found that any (or the same) client can open multiple connections on this port and send data to it even though the server has only called the TCP listen VI once and only has a reference for the first connection. The subsequent connections seem to be accumlating in the port buffer and the data can in fact be retrieved with subsequent calls to TCP listen on that port regardless of whether the client has closed the connection long ago and forgotten about the transaction.
This could perhaps be considered either a feature or a bug. For me it is undesirabl
e. I would prefer that attempted connections to the server were rejected if the server is not actually actively listening on the port. Otherwise clients can easily flood the port.
Is there some way to control this behaviour, or perhaps a completely different approach? or is there some way to control the port settings such as buffer size or max number of connections allowed, and a way to clear the buffer without processing all the connections?
Thanks in advance for any thoughts.

Thanks for the comments.
I don't seem to get the same behaviour you describe.
When you say 'if the server closes the connection after reading the first request, then it will not process the rest of the requests waiting in the queue'. I find that after the server closes the connection (with TCP close connection) then there can still be a huge backlog of connections to the same port (requests) which are still waiting to be processed. Another call to TCP listen retrieves one of the old ones, it doesn't wait around for a legitimately new request from a client.
Where you say 'When you leave the connection open on the server side, you can receive multiple commands this way, but it also blocks other clients from connecting until the curre
nt client disconnects'. This is in fact my main difficulty. Even with a connection held open other clients (or the same client) CAN make other connections and send data through that connection. This then backs up if the server is not processing them faster than recieving them.
I've attached vi's which should demonstrate the issue.
I couldn't check your vi's. I'm missing the EOC error.vi and one other I think. Ultimately I hope to do something similar with multiple open connections, but still need the server to be able to refuse connections if it wants to. Something I don't seem to be able to do. The connections just keep coming regardless of how the server is set up.
Thanks again.
Steve
Attachments:
server.vi ‏229 KB
client.vi ‏28 KB

How to identified which instance is associated with which Listener

Hi all,
i created one DB instance. suppose named as "B". but there is already another DB instance present. Named as "A".
Then i created one listener for DB instace "B".
Now my Que. is that HOW i can identify which instance is associated with which Listener,.
2) if i create listener then a service also created. if i stopped that service and then can i fire query OR Login again, WHAT will be the expected result.
I tried by asking people for my answer. but not satisfied.
Please Help me For this.
Thanks in Advance

see the file listener.ora. path is usually, $ORACLE_HOME/network/admin/listener.ora
You will see which listener is associated with which file,
Details will be usually like this
>
LSNR1 =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = instance1)(PORT = 1666))
LSNR2 =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = instance2)(PORT = 2666))
>
>
if i create listener then a service also created. if i stopped that service and then can i fire query OR Login again, WHAT will be the expected result.
I tried by asking people for my answer. but not satisfied.
>
A listener is used when a client wants to connect to the database server. If you are logging in directly on the server without using instance name, then you can login even if you stop the service.
check this,
C:\Windows\system32>lsnrctl stop
LSNRCTL for 32-bit Windows: Version 10.2.0.3.0 - Production on 03-MAY-2011 23:06
:22
Copyright (c) 1991, 2006, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1)))
The command completed successfully
C:\Windows\system32>sqlplus ganesh
SQL*Plus: Release 10.2.0.3.0 - Production on Tue May 3 23:06:36 2011
Copyright (c) 1982, 2006, Oracle. All Rights Reserved.
Enter password:
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - Production
With the Partitioning, OLAP and Data Mining options
SQL> select * from dual;
D
X
SQL>But if you try to connect from a client, or use the instance name while connectineg
you get the error like this,
SQL> conn ganesh@ganesh
Enter password: ******
ERROR:
ORA-12541: TNS:no listener
Warning: You are no longer connected to ORACLE.
SQL> If you see, I used the instance name @ganesh.
G.

TCP listener?

Hello,
Is it possible to create TCP listener instead of HTTP or IIOP one in J2EE? My client application sends only TCP messages and as it is external system I can not change it. How to deal with it in elegant way within J2EE?
Thank you,
Ps. I am newbie in J2EE and currently designing new application.

Just put a multiplexing proxy between the two,
wrapping your legacy request in an http request
and feeding back the html response.

Any additional configuration require to achieve TAF in 11.2.0.4 RAC along with scan listener

Hi
We have 2 node RAC database of version 11.2.0.4 running on Linux platform.
There are 2 SCAN listener running on DB instead of 3 which usually recommenced by oracle.
When one of instance brought down as scheduled activity, sessions which connected to same instance, received ORA-03113: end-of-file on communication channel.
They were doing some select activity in db.
When user reconnected, it got connected to available instance.
tns entry which users are using (description=(address=(protocol=tcp)(host=p1bds1d4-scan.sldc.sbc.com)(port=1521))(connect_data=(server=dedicated)(service_name=p1bds1d4)))
Do we need to do any additional configuration to achieve TAF in 11.2.0.4 along with SCAN listener.
Do we need to change tns to include clause like "FAILOVER_MODE=(TYPE=SELECT)(METHOD=BASIC)(RETRIES=180)(DELAY=5)" ?
Please help.
Thanks
Ashish

You could enable TAF from the cient side by adding a clause such as that you suggest to your connect strings, but in a GI envirinment you would normally do it by adjusting the way the sevice is registered in the OCR. Run
srvctl modify service -h
and look up the -e and -m switches.
John Watson
Oracle Certified Master DBA

TCP Listen only accepts 1 packet

Hello,
I am trying to create a RS232 to TCP/IP converter VI. I am trying to use this VI to allow my main VI to communicate with a microcontroller (using rs232) over a network and I do not have access to a hardware converter. The VI works great for sending data from the microcontroller ( rs232 -->TCP) but I am having problems getting information to the microcontroller (TCP --> rs232). I have tried numerous server configurations using the TCP Listen and Create Socket. For some reason I can only seem to receive a packet when using TCP Listen and no while loop but then it only receives 1 packet and none after that. I have used other programs to verify that the main VI is correctly sending the packet to that port and have verified that the problem is in this VI.
The following image is the "working" version that only receives the first packet sent to it
The following two pictures are the other configurations I've tried but they receive no packets.
TCP Listen with while loop
TCP Wait on Listener
If you can provide any help it will be much appreciated.
Thank you,
meanmon13
Solved!
Go to Solution.

Those wont work because you aren't thinking dataflow. Dataflow means each piece will execute when all the inputs to it are available. Your first while loop runs forever. There is an input to the second while loop coming from the first while loop. Hence, it will never get to your second while loop, and thats why you aren't receiving anything.
Put everything in one loop and use error wires to control the order
Message Edited by for(imstuck) on 06-09-2010 11:26 AM
CLA, LabVIEW Versions 2010-2013

ODBC with TCPS listener

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