# Undefined socket constants

**URL:** <https://www.ruby-forum.com/t/undefined-socket-constants/180036>\
**Category:** IronRuby\
**Created:** [December 10, 2009, 2:45am UTC](https://www.ruby-forum.com/t/undefined-socket-constants/180036 "2009-12-10T02:45:22Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![rogerdpack](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/45deac/32.png) [@rogerdpack](https://www.ruby-forum.com/u/rogerdpack)\
**Post date:** [December 10, 2009, 2:45am UTC](https://www.ruby-forum.com/t/undefined-socket-constants/180036/1 "2009-12-10T02:45:22Z")

</div>

appears from  
[http://www.ruby-forum.com/topic/200353#new](http://www.ruby-forum.com/topic/200353#new)

that a few constants are missing in IronRuby

" Socket::IP\_ADD\_MEMBERSHIP = 12 must be done  
Socket::IP\_MULTICAST\_LOOP, Socket::IP\_MULTICAST\_TTL not known"

however at least it works 🙂  
-r