indigo_ccd_altair driver appears to prevent indigo_mount_synscan from using wifi

[JohnInTheGarage]

I know this sounds ridiculous, but that is my conclusion after trying all permutations. My startIndigo.sh script used to be
indigo_server indigo_mount_synscan indigo_ccd_altair indigo_ccd_playerone indigo_focuser_moonlite
when the mount was controlled via USB.

Recently I made a "wifi dongle" for the mount, partly for fun, partly to eliminate a cable. It tested fine when the indigo_mount_synscan driver was the only one loaded, but going back to the normal script (above), as soon as I attempted to connect the Mount it failed with "indigo_mount_synscan[synscan_open:89]: Failed to connect to synscan://192.168.0.244:11880 @ UDP".

So I updated startIndigo, taking drivers out, changing the sequence etc and eventually found that including the altair driver makes it fail. For me, its not a showstopper; I can load altair manually with the control panel after the rest have started (that tested OK this afternoon), but I thought I should report it.

[JohnInTheGarage]

I did a little debugging of the issue (very little; I'm not a C person), adding some log messages in case the execution path was different when the altair driver was loaded, but its the same. What happens is when the indigo_open_udp function calls open_socket() it returns -1 if the altair driver is already loaded. Log and code changes attached.
At 22:19, Indigo server started with just synscan driver, at 22:20 synscan + altair driver. Messages tagged with "jk:"

Its still as barmy as before but hopefully someone will believe me now :-)

jk.log

indigo_mount_synscan_driver.c

indigo_io.c