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End of Life Ruby 3.1 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →

instance method

Socket::AncillaryData#type

ancillarydata.type => integer

returns the cmsg type as an integer.

Example
p Socket::AncillaryData.new(:INET6, :IPV6, :PKTINFO, "").type
#=> 2
See also #timestamp #unix_rights #level also in 4.1 · 4.0 · 3.4 · 3.3 · 3.2 · 3.0