Experimental Physics and
Industrial Control System

Andrew Johnson <[email protected]> · Thu, 3 Mar 2016 12:58:17 -0600

On 03/02/2016 06:15 PM, Andrew Johnson wrote:
> Ok, it's called 3 times by rsrv_build_addr_lists() at iocInit, and it's
> the middle time (beaconAddrList) that squawks:

The call to osiSockDiscoverBroadcastAddresses() is adding the address to
its output list twice. Cygwin uses the
libCom/osi/os/default/osdNetIntf.c implementation, so I rebuilt that
file with DEBUG to enable messages:

> Starting iocInit
> ############################################################################
> ## EPICS R3.15.3-DEV $$Date$$
> ## EPICS Base built Mar  2 2016
> ############################################################################
> ifreqNext() pifreq 0x600104c30, size 0x50, ifr 0x0x600104c80
> osiSockDiscoverBroadcastAddresses(): found IFACE: {6D740D7B-7CB5-4E95-8082-3858A0463BF0} len: 0x2c current_ifreqsize: 0x50 
> found broadcast addr = a43616ff
> osiSockDiscoverBroadcastAddresses(): net intf "{6D740D7B-7CB5-4E95-8082-3858A0463BF0}" found
> ifreqNext() pifreq 0x600104c80, size 0x50, ifr 0x0x600104cd0
> osiSockDiscoverBroadcastAddresses(): found IFACE: {2BC35C5D-5E9B-44D1-844B-3E58710347AC} len: 0x2c current_ifreqsize: 0x50 
> found broadcast addr = a43616ff
> osiSockDiscoverBroadcastAddresses(): net intf "{2BC35C5D-5E9B-44D1-844B-3E58710347AC}" found
> ifreqNext() pifreq 0x600104cd0, size 0x50, ifr 0x0x600104d20
> osiSockDiscoverBroadcastAddresses(): found IFACE: {846EE342-7039-11DE-9D20-806E6F6E6963} len: 0x2c current_ifreqsize: 0x50 
> osiSockDiscoverBroadcastAddresses(): net intf "{846EE342-7039-11DE-9D20-806E6F6E6963}": not point to point or bcast?
> Warning: Duplicate EPICS CA Address list entry "164.54.22.255:5065" discarded
> iocRun: All initialization complete

With display of the IFFLAGS parameter added there is a difference in the
flags:

> osiSockDiscoverBroadcastAddresses(): found IFACE: {6D740D7B-7CB5-4E95-8082-3858A0463BF0} len: 0x2c current_ifreqsize: 0x50 
> osiSockDiscoverBroadcastAddresses(): net intf "{6D740D7B-7CB5-4E95-8082-3858A0463BF0}" flags: 11043
> found broadcast addr = a43616ff
> osiSockDiscoverBroadcastAddresses(): net intf "{6D740D7B-7CB5-4E95-8082-3858A0463BF0}" found
> ifreqNext() pifreq 0x600104c80, size 0x50, ifr 0x0x600104cd0
> osiSockDiscoverBroadcastAddresses(): found IFACE: {2BC35C5D-5E9B-44D1-844B-3E58710347AC} len: 0x2c current_ifreqsize: 0x50 
> osiSockDiscoverBroadcastAddresses(): net intf "{2BC35C5D-5E9B-44D1-844B-3E58710347AC}" flags: 11003
> found broadcast addr = a43616ff
> osiSockDiscoverBroadcastAddresses(): net intf "{2BC35C5D-5E9B-44D1-844B-3E58710347AC}" found
> ifreqNext() pifreq 0x600104cd0, size 0x50, ifr 0x0x600104d20
> osiSockDiscoverBroadcastAddresses(): found IFACE: {846EE342-7039-11DE-9D20-806E6F6E6963} len: 0x2c current_ifreqsize: 0x50 
> osiSockDiscoverBroadcastAddresses(): net intf "{846EE342-7039-11DE-9D20-806E6F6E6963}" flags: 11049
> osiSockDiscoverBroadcastAddresses(): net intf "{846EE342-7039-11DE-9D20-806E6F6E6963}": not point to point or bcast?
> Warning: Duplicate EPICS CA Address list entry "164.54.22.255:5065" discarded

...

- Andrew

-- 
There are only two hard problems in distributed systems:
  2. Exactly-once delivery
  1. Guaranteed order of messages
  2. Exactly-once delivery
 -- Mathias Verraes

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System