Re: pv Access setup

[montis via Tech-talk <tech-talk at aps.anl.gov>]

Hi!

if you are playing in localhost, avoid to set EPICS_PVA_ADDR_LIST=127.0.0.1 and use your physical NIC. When I started to test pvAccess in my "test" machine, I found the EPICS_PVA_ADDR_LIST doesn't like loopback interface.

pvget <PV> with EPICS_PVA_ADDR_LIST=127.0.0.1  --> failed

pvget <PV> with EPICS_PVA_ADDR_LIST=192.168.30.40  --> worked

Hope this helps

Ciao!

Maurizio

Il 2021-04-19 11:25 Дмитрий Прощенко via Tech-talk ha scritto:

Hello, Michael!

 

CA woks. I've tested softIocPVA and that is what happened:

epics> pvasr

pvAccess Server v7.1.0

Active configuration (w/ defaults)

EPICS_PVAS_INTF_ADDR_LIST = 0.0.0.0:5075

EPICS_PVAS_BEACON_ADDR_LIST = 127.255.255.255

EPICS_PVAS_AUTO_BEACON_ADDR_LIST = NO

EPICS_PVAS_BEACON_PERIOD = 15

EPICS_PVAS_BROADCAST_PORT = 5076

EPICS_PVAS_SERVER_PORT = 5075

EPICS_PVAS_PROVIDER_NAMES = QSRV

 

pvget -d cnt

2021-04-19T10:59:32.552 Creating datagram socket from: 0.0.0.0:46421.

2021-04-19T10:59:32.552 Broadcast address #0: 127.255.255.255:5076. (unicast)

2021-04-19T10:59:32.552 Setting up UDP for interface 192.168.1.145/255.255.255.0, broadcast 192.168.1.255, dest <none>.

2021-04-19T10:59:32.552 Creating datagram socket from: 192.168.1.145:5076.

2021-04-19T10:59:32.552 Creating datagram socket from: 192.168.1.255:5076.

2021-04-19T10:59:32.553 Setting up UDP for interface 192.168.122.1/255.255.255.0, broadcast 192.168.122.255, dest <none>.

2021-04-19T10:59:32.553 Creating datagram socket from: 192.168.122.1:5076.

2021-04-19T10:59:32.553 Creating datagram socket from: 192.168.122.255:5076.

2021-04-19T10:59:32.553 Creating datagram socket from: 224.0.0.128:5076.

2021-04-19T10:59:32.553 Local multicast enabled on 127.0.0.1/224.0.0.128:5076.

2021-04-19T10:59:32.553 Sending 49 bytes 0.0.0.0:46421 -> 127.255.255.255:5076.

Waiting...

2021-04-19T10:59:32.793 Sending 49 bytes 0.0.0.0:46421 -> 127.255.255.255:5076.

2021-04-19T10:59:33.272 Sending 49 bytes 0.0.0.0:46421 -> 127.255.255.255:5076.

2021-04-19T10:59:34.230 Sending 49 bytes 0.0.0.0:46421 -> 127.255.255.255:5076.

2021-04-19T10:59:36.146 Sending 49 bytes 0.0.0.0:46421 -> 127.255.255.255:5076.

Timeout

..............

 

As far as I understand address 127.255.255.255:5076 is right to broadcast. But in my other OS and in your example IP is defined (e.g. 192.168.18.190). Problems is able to receive message due to network setting?

 

19.04.2021, 00:57, "Michael Davidsaver" <mdavidsaver at gmail.com>:

On 4/18/21 10:07 AM, Дмитрий Прощенко via Tech-talk wrote:

 Hi all!
  
 Im writting cpp program to drive a power supply. Use pv Access for connection. Also I created an IOC using makeBaseApp.pl on my Kubuntu and created bd for testing. And all is well. But using other OS whit IOC I found that my program is not working. pvget isnt working too. I was able tofind information on the need to use qsrv:
 myioc_LIBS += qsrv
 myioc_LIBS += pvAccessIOC
 myioc_DBD += PVASeerverRegister.dbd
 myioc_DBD += qsrv.dbd
  
 executing pvasr on other OS:
 EPICS_PVAS_INTF_ADDR_LIST = 0.0.0.0:5075
 EPICS_PVAS_BEACON_ADDR_LIST = 127.255.255.255
 EPICS_PVAS_AUTO_BEACON_ADDR_LIST = NO
 ....

This looks correct.
 

 And pvget or pvput is not working anyway. I used pva2pva (QSRV / pvAccess Gateway) to know about qsrc. What documants shout I pay attention to? What should I fix to keep it working? I would like to use several IOCs, do I need to configure my addresses go them for correct operation?

Can you test with the softIocPVA executable and a simple database?
This should confirm if this is a network issue.

Also, can you confirm that caget also works?

 

 cat <<EOF > tick.db
 record(calc, "$(P=)cnt") {
   field(INPA, "$(P=)cnt")
   field(CALC, "A+1")
   field(SCAN, "1 second")
 }
 EOF

 

 $ softIocPVA -d tick.db
 ...

 

 $ pvget -d cnt
 2021-04-18T10:55:41.653 Creating datagram socket from: 0.0.0.0:45045.
 2021-04-18T10:55:41.653 Broadcast address #0: 192.168.1.255:5076. (not unicast)
 2021-04-18T10:55:41.653 Broadcast address #1: 192.168.210.255:5076. (not unicast)
 2021-04-18T10:55:41.653 Setting up UDP for interface 192.168.1.68/255.255.255.0, broadcast 192.168.1.255, dest <none>.
 2021-04-18T10:55:41.653 Creating datagram socket from: 192.168.1.68:5076.
 2021-04-18T10:55:41.653 Creating datagram socket from: 192.168.1.255:5076.
 2021-04-18T10:55:41.653 Setting up UDP for interface 192.168.210.1/255.255.255.0, broadcast 192.168.210.255, dest <none>.
 2021-04-18T10:55:41.653 Creating datagram socket from: 192.168.210.1:5076.
 2021-04-18T10:55:41.653 Creating datagram socket from: 192.168.210.255:5076.
 2021-04-18T10:55:41.653 Creating datagram socket from: 224.0.0.128:5076.
 2021-04-18T10:55:41.653 Local multicast enabled on 127.0.0.1/224.0.0.128:5076.
 2021-04-18T10:55:41.653 Sending 49 bytes 0.0.0.0:45045 -> 192.168.1.255:5076.
 2021-04-18T10:55:41.653 Socket sendto to 192.168.1.255:5076 error: Operation not permitted.
 2021-04-18T10:55:41.653 Sending 49 bytes 0.0.0.0:45045 -> 192.168.210.255:5076.
 2021-04-18T10:55:41.653 UDP Client Rx (49) 192.168.210.255:5076 <- 192.168.210.1:45045
 Waiting...
 2021-04-18T10:55:41.654 UDP Client Rx (53) 0.0.0.0:45045 <- 192.168.210.1:58034
 2021-04-18T10:55:41.654 Connecting to PVA server: 192.168.210.1:41685.
 2021-04-18T10:55:41.654 Opening socket to PVA server 192.168.210.1:41685, attempt 1.
 2021-04-18T10:55:41.654 Socket connected to PVA server: 192.168.210.1:41685.
 2021-04-18T10:55:41.654 Acquiring transport to 192.168.210.1:41685.
 2021-04-18T10:55:41.655 Connected to PVA server: 192.168.210.1:41685.
 cnt 2021-04-18 10:55:40.828 38
 2021-04-18T10:55:41.655 Releasing TCP transport to 192.168.210.1:41685.
 2021-04-18T10:55:41.655 TCP socket to 192.168.210.1:41685 is to be closed.
 2021-04-18T10:55:41.655 UDP socket 0.0.0.0:0 closed.
 2021-04-18T10:55:41.655 UDP Client Rx (0) 0.0.0.0:45045 <- 192.168.210.1:58034
 2021-04-18T10:55:41.655 UDP socket 192.168.1.68:5076 closed.
 2021-04-18T10:55:41.655 UDP Client Rx (0) 192.168.1.68:5076 <- <Ukn Addr Type>
 2021-04-18T10:55:41.655 UDP socket 192.168.1.255:5076 closed.
 2021-04-18T10:55:41.655 UDP Client Rx (0) 192.168.1.255:5076 <- <Ukn Addr Type>
 2021-04-18T10:55:41.655 UDP socket 192.168.210.1:5076 closed.
 2021-04-18T10:55:41.655 UDP Client Rx (0) 192.168.210.1:5076 <- <Ukn Addr Type>
 2021-04-18T10:55:41.655 UDP socket 192.168.210.255:5076 closed.
 2021-04-18T10:55:41.655 UDP Client Rx (0) 192.168.210.255:5076 <- 192.168.210.1:45045
 2021-04-18T10:55:41.655 UDP socket 224.0.0.128:5076 closed.
 2021-04-18T10:55:41.655 UDP Client Rx (0) 224.0.0.128:5076 <- <Ukn Addr Type>
 Done

--

~~ Maurizio Montis - Control System Engineer ~~
   office: +39 0498068558
   mobile: +39 3408428089
   mail: maurizio.montis at lnl.infn.it
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Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali di Legnaro
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