This is the log of an EPICS 7.0.6 IOC with 'var CASDEBUG 3' when contacted by the ca_test unility:
7.0.6 client:
CAS: cast server msg of 48 bytes from addr 127.0.0.1:33835
CAS: Request from 127.0.0.1:33835 => cmmd=0 cid=0x1 type=1 count=13 postsize=0
CAS: Request from 127.0.0.1:33835 => available=0x0 N=1 paddr=(nil)
CAS: Request from 127.0.0.1:33835 => cmmd=6 cid=0x1 type=5 count=13 postsize=16
CAS: Request from 127.0.0.1:33835 => available=0x1 N=2 paddr=(nil)
CAS: Sending a udp message of 40 bytes
CAS: conn req from 127.0.0.1:58648
CAS: Request from 127.0.0.1:58648 => cmmd=0 cid=0x0 type=0 count=13 postsize=0
CAS: Request from 127.0.0.1:58648 => available=0x0 N=1 paddr=(nil)
CAS: Request from 127.0.0.1:58648 => cmmd=20 cid=0x0 type=0 count=0 postsize=8
CAS: Request from 127.0.0.1:58648 => available=0x0 N=2 paddr=(nil)
CAS: Request from 127.0.0.1:58648 => cmmd=21 cid=0x0 type=0 count=0 postsize=8
CAS: Request from 127.0.0.1:58648 => available=0x0 N=3 paddr=(nil)
CAS: Request from 127.0.0.1:58648 => cmmd=18 cid=0x1 type=0 count=0 postsize=16
CAS: Request from 127.0.0.1:58648 => available=0xd N=4 paddr=(nil)
CAS: Sending a message of 48 bytes
CAS: Request from 127.0.0.1:58648 => cmmd=15 cid=0x7 type=0 count=2 postsize=0
CAS: Request from 127.0.0.1:58648 => available=0x1 N=1 paddr=0x7fca5c012178
CAS: Request from 127.0.0.1:58648 => cmmd=15 cid=0x7 type=7 count=2 postsize=0
CAS: Request from 127.0.0.1:58648 => available=0x2 N=2 paddr=0x7fca5c012178
CAS: Request from 127.0.0.1:58648 => cmmd=15 cid=0x7 type=14 count=2 postsize=0
CAS: Request from 127.0.0.1:58648 => available=0x3 N=3 paddr=0x7fca5c012178
CAS: Request from 127.0.0.1:58648 => cmmd=15 cid=0x7 type=21 count=2 postsize=0
CAS: Request from 127.0.0.1:58648 => available=0x4 N=4 paddr=0x7fca5c012178
CAS: Request from 127.0.0.1:58648 => cmmd=15 cid=0x7 type=28 count=2 postsize=0
CAS: Request from 127.0.0.1:58648 => available=0x5 N=5 paddr=0x7fca5c012178
CAS: Sending a message of 520 bytes
CAS: Request from 127.0.0.1:58648 => cmmd=12 cid=0x7 type=0 count=0 postsize=0
CAS: Request from 127.0.0.1:58648 => available=0x1 N=1 paddr=0x7fca5c012178
CAS: Sending a message of 16 bytes
CAS: nill message disconnect ( 8 bytes request )
CAS: Connection 22 Terminated
3.14.12 client:
CAS: Request from 127.0.0.1:52427 => cmmd=0 cid=0x1 type=1 count=13 postsize=0
CAS: Request from 127.0.0.1:52427 => available=0x0 N=1 paddr=(nil)
CAS: Request from 127.0.0.1:52427 => cmmd=6 cid=0x1 type=5 count=13 postsize=16
CAS: Request from 127.0.0.1:52427 => available=0x1 N=2 paddr=(nil)
CAS: Sending a udp message of 40 bytes
CAS: conn req from 127.0.0.1:58650
CAS: Request from 127.0.0.1:58650 => cmmd=0 cid=0x0 type=0 count=13 postsize=0
CAS: Request from 127.0.0.1:58650 => available=0x0 N=1 paddr=(nil)
CAS: Request from 127.0.0.1:58650 => cmmd=20 cid=0x0 type=0 count=0 postsize=8
CAS: Request from 127.0.0.1:58650 => available=0x0 N=2 paddr=(nil)
CAS: Request from 127.0.0.1:58650 => cmmd=21 cid=0x0 type=0 count=0 postsize=8
CAS: Request from 127.0.0.1:58650 => available=0x0 N=3 paddr=(nil)
CAS: Request from 127.0.0.1:58650 => cmmd=18 cid=0x1 type=0 count=0 postsize=16
CAS: Request from 127.0.0.1:58650 => available=0xd N=4 paddr=(nil)
CAS: Sending a message of 48 bytes
CAS: Request from 127.0.0.1:58650 => cmmd=15 cid=0x8 type=0 count=2 postsize=0
CAS: Request from 127.0.0.1:58650 => available=0x1 N=1 paddr=0x7fca5c012178
CAS: Request from 127.0.0.1:58650 => cmmd=15 cid=0x8 type=7 count=2 postsize=0
CAS: Request from 127.0.0.1:58650 => available=0x2 N=2 paddr=0x7fca5c012178
CAS: Request from 127.0.0.1:58650 => cmmd=15 cid=0x8 type=14 count=2 postsize=0
CAS: Request from 127.0.0.1:58650 => available=0x3 N=3 paddr=0x7fca5c012178
CAS: Request from 127.0.0.1:58650 => cmmd=15 cid=0x8 type=21 count=2 postsize=0
CAS: Request from 127.0.0.1:58650 => available=0x4 N=4 paddr=0x7fca5c012178
CAS: Request from 127.0.0.1:58650 => cmmd=15 cid=0x8 type=28 count=2 postsize=0
CAS: Request from 127.0.0.1:58650 => available=0x5 N=5 paddr=0x7fca5c012178
CAS: Sending a message of 520 bytes
CAS: Request from 127.0.0.1:58650 => cmmd=12 cid=0x8 type=0 count=0 postsize=0
CAS: Request from 127.0.0.1:58650 => available=0x1 N=1 paddr=0x7fca5c012178
CAS: Sending a message of 16 bytes
CAS: nill message disconnect ( 8 bytes request )
CAS: Connection 3 Terminated
3.13.10 client:
pc12708> CAS: cast server msg of 32 bytes from addr 127.0.0.1:54966
CAS: Request from 127.0.0.1:54966 => cmmd=6 cid=0x0 type=1280 count=8 postsize=16
CAS: Request from 127.0.0.1:54966 => available=0x0 N=1 paddr=(nil)
CAS: Sending a udp message of 40 bytes
CAS: conn req from 127.0.0.1:58652
CAS: Request from 127.0.0.1:58652 => cmmd=20 cid=0x0 type=0 count=0 postsize=8
CAS: Request from 127.0.0.1:58652 => available=0x0 N=1 paddr=(nil)
CAS: Request from 127.0.0.1:58652 => cmmd=21 cid=0x0 type=0 count=0 postsize=8
CAS: Request from 127.0.0.1:58652 => available=0x0 N=2 paddr=(nil)
CAS: Request from 127.0.0.1:58652 => cmmd=18 cid=0x0 type=0 count=0 postsize=16
CAS: Request from 127.0.0.1:58652 => available=0x8 N=3 paddr=(nil)
CAS: Sending a message of 48 bytes
CAS: Request from 127.0.0.1:58652 => cmmd=15 cid=0x9 type=0 count=2 postsize=0
CAS: Request from 127.0.0.1:58652 => available=0x0 N=1 paddr=0x7fca5c012178
CAS: Request from 127.0.0.1:58652 => cmmd=15 cid=0x9 type=7 count=2 postsize=0
CAS: Request from 127.0.0.1:58652 => available=0x1000000 N=2 paddr=0x7fca5c012178
CAS: Request from 127.0.0.1:58652 => cmmd=15 cid=0x9 type=14 count=2 postsize=0
CAS: Request from 127.0.0.1:58652 => available=0x2000000 N=3 paddr=0x7fca5c012178
CAS: Request from 127.0.0.1:58652 => cmmd=15 cid=0x9 type=21 count=2 postsize=0
CAS: Request from 127.0.0.1:58652 => available=0x3000000 N=4 paddr=0x7fca5c012178
CAS: Request from 127.0.0.1:58652 => cmmd=15 cid=0x9 type=28 count=2 postsize=0
CAS: Request from 127.0.0.1:58652 => available=0x4000000 N=5 paddr=0x7fca5c012178
CAS: Sending a message of 520 bytes
CAS: nill message disconnect ( 8 bytes request )
CAS: Connection 22 Terminated
The 3.13.10 lient never announces its version (cmd=0)!
I had to remove the client version check from camessage to make it work.
A 3.14.12 IOC shows the same messages.
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https://bugs.launchpad.net/bugs/1971737
Title:
EPICS 3.13 clients cannot connect to EPICS 7 or 3.16
Status in EPICS Base:
New
Bug description:
Since commit 95fd255d "rsrv: ignore CA client version older than v4.4"
from Jul 30 2016, EPICS 3.13 clients cannot connect any more, even
though their CA version is V4.8.
The reason is that camessage drops the incoming CA_PROTO_SEARCH
messages because the 3.13 client has not yet sent a CA_PROTO_VERSION
message and thus the code reads client->minor_version_number as 0.
This is a huge hindrance for upgrading 3.14 IOCs to EPICS 7 when there
are still 3.13 IOC (which cannot be upgraded yet) in the network which
need to connect.
To manage notifications about this bug go to:
https://bugs.launchpad.net/epics-base/+bug/1971737/+subscriptions
- References:
- [Bug 1971737] [NEW] EPICS 3.13 clients cannot connect to EPICS 7 or 3.16 Dirk Zimoch via Core-talk
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