81 lines
2.2 KiB
Ruby
81 lines
2.2 KiB
Ruby
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# Patchup to add Socket#sendmsg and Socket#recvmsg for ruby 1.8
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if BasicSocket.instance_methods.grep(/^sendmsg$/).empty?
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require 'ffi'
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class BasicSocket
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module FFIExt
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extend FFI::Library
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ffi_lib FFI::Library::LIBC
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attach_function :sendmsg, [:int, :buffer_in, :int], :ssize_t
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attach_function :recvmsg, [:int, :buffer_inout, :int], :ssize_t
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end
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class Msghdr < FFI::Struct
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layout :name, :pointer,
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:namelen, :socklen_t,
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:iov, :pointer,
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:iovlen, :size_t,
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:control, :pointer,
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:controllen, :socklen_t,
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:flags, :int
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end
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class IOVec < FFI::Struct
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layout :base, :pointer,
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:len, :size_t
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end
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def sendmsg(mesg, flags=0, dest_sockaddr=nil, *controls)
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data = FFI::MemoryPointer.new(mesg.bytesize, 1, false)
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data.put_bytes(0, mesg)
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iov = IOVec.new
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iov[:base] = data
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iov[:len] = mesg.bytesize
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header = Msghdr.new
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header[:name] = nil # TODO: dest_sockaddr
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header[:namelen] = 0 # dest_sockaddr
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header[:iov] = iov
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header[:iovlen] = 1
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header[:control] = nil # TODO: controls
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header[:controllen] = 0 # controls
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header[:flags] = flags
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Kernel.select(nil, [self])
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res = FFIExt.sendmsg(fileno, header, flags)
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raise "sendmsg error: #{res}" if res < 0 # FIXME: read errno
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# return numbytes_sent
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res
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end
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def recvmsg(maxmesglen=nil, flags=0, maxcontrollen=nil, opts={})
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data = FFI::MemoryPointer.new(maxmesglen || 4096, 1, false)
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namebuf = FFI::MemoryPointer.new(64, 1, false)
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iov = IOVec.new
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iov[:base] = data
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iov[:len] = data.size
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header = Msghdr.new
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header[:name] = namebuf
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header[:namelen] = namebuf.size
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header[:iov] = iov
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header[:iovlen] = 1
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header[:flags] = flags
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Kernel.select([self])
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res = FFIExt.recvmsg(fileno, header, flags)
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raise "recvmsg error: #{res}" if res < 0 # FIXME: read errno
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# return [mesg, sender_addrinfo, rflags, *controls]
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return [
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data.get_bytes(0, res),
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namebuf.get_bytes(0, header[:namelen]),
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header[:flags]
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# TODO: controls
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]
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end
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end
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end
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