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require File.expand_path('../../../../spec_helper', __FILE__)
require 'socket'
describe "Socket::BasicSocket#ioctl" do
platform_is :os => :linux do
it "passes data from and to a String correctly" do
s = Socket.new Socket::AF_INET, Socket::SOCK_DGRAM, 0
# /usr/include/net/if.h, structure ifreq
# The structure is 32 bytes on x86, 40 bytes on x86_64
if_name = ['lo'].pack('a16')
buffer = if_name + 'z' * 24
# SIOCGIFADDR in /usr/include/bits/ioctls.h
s.ioctl 0x8915, buffer
s.close
# Interface name should remain unchanged.
buffer[0, 16].should == if_name
# lo should have an IPv4 address of 127.0.0.1
buffer[16, 1].unpack('C').first.should == Socket::AF_INET
buffer[20, 4].should == "\x7f\0\0\x01"
end
end
end
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