Module: Socket::Foreign

Extended by:
Library
Defined in:
lib/rubysl/socket/socket.rb

Defined Under Namespace

Classes: Addrinfo

Class Method Summary collapse

Class Method Details

.bind(descriptor, sockaddr) ⇒ Object 



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# File 'lib/rubysl/socket/socket.rb', line 234

def self.bind(descriptor, sockaddr)
  FFI::MemoryPointer.new :char, sockaddr.length do |sockaddr_p|
    sockaddr_p.write_string sockaddr, sockaddr.length

    _bind descriptor, sockaddr_p, sockaddr.length
  end
end

.connect(descriptor, sockaddr) ⇒ Object 



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# File 'lib/rubysl/socket/socket.rb', line 242

def self.connect(descriptor, sockaddr)
  err = 0
  FFI::MemoryPointer.new :char, sockaddr.length do |sockaddr_p|
    sockaddr_p.write_string sockaddr, sockaddr.length

    err = _connect descriptor, sockaddr_p, sockaddr.length
  end

  err
end

.getaddress(host) ⇒ Object 



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# File 'lib/rubysl/socket/socket.rb', line 325

def self.getaddress(host)
  addrinfos = getaddrinfo(host)
  unpack_sockaddr_in(addrinfos.first[4], false).first
end

.getaddrinfo(host, service = nil, family = nil, socktype = nil, protocol = nil, flags = nil) ⇒ Object 



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# File 'lib/rubysl/socket/socket.rb', line 267

def self.getaddrinfo(host, service = nil, family = nil, socktype = nil,  protocol = nil, flags = nil)
  hints = Addrinfo.new
  hints[:ai_family] = family || 0
  hints[:ai_socktype] = socktype || 0
  hints[:ai_protocol] = protocol || 0
  hints[:ai_flags] = flags || 0

  if host && (host.empty? || host == '<any>')
    host = "0.0.0.0"
  elsif host == '<broadcast>'
    host = '255.255.255.255'
  end

  res_p = FFI::MemoryPointer.new :pointer

  err = _getaddrinfo host, service, hints.pointer, res_p

  raise SocketError, gai_strerror(err) unless err == 0

  ptr = res_p.read_pointer

  return [] unless ptr

  res = Addrinfo.new ptr

  addrinfos = []

  while true
    addrinfo = []
    addrinfo << res[:ai_flags]
    addrinfo << res[:ai_family]
    addrinfo << res[:ai_socktype]
    addrinfo << res[:ai_protocol]
    addrinfo << res[:ai_addr].read_string(res[:ai_addrlen])
    addrinfo << res[:ai_canonname]

    addrinfos << addrinfo

    break unless res[:ai_next]

    res = Addrinfo.new res[:ai_next]
  end

  return addrinfos
ensure
  hints.free if hints

  if res_p
    ptr = res_p.read_pointer

    # Be sure to feed a legit pointer to freeaddrinfo
    if ptr and !ptr.null?
      freeaddrinfo ptr
    end
    res_p.free
  end
end

.getnameinfo(sockaddr, flags = Socket::Constants::NI_NUMERICHOST | Socket::Constants::NI_NUMERICSERV, reverse_lookup = !BasicSocket.do_not_reverse_lookup)) ⇒ Object 



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# File 'lib/rubysl/socket/socket.rb', line 330

def self.getnameinfo(sockaddr, flags = Socket::Constants::NI_NUMERICHOST | Socket::Constants::NI_NUMERICSERV,
                     reverse_lookup = !BasicSocket.do_not_reverse_lookup)
  name_info = []
  value = nil

  FFI::MemoryPointer.new :char, sockaddr.length do |sockaddr_p|
    FFI::MemoryPointer.new :char, Socket::Constants::NI_MAXHOST do |node|
      FFI::MemoryPointer.new :char, Socket::Constants::NI_MAXSERV do |service|
        sockaddr_p.write_string sockaddr, sockaddr.length

        if reverse_lookup then
          err = _getnameinfo(sockaddr_p, sockaddr.length,
                             node, Socket::Constants::NI_MAXHOST, nil, 0, 0)

          name_info[2] = node.read_string if err == 0
        end

        err = _getnameinfo(sockaddr_p, sockaddr.length,
                           node, Socket::Constants::NI_MAXHOST,
                           service, Socket::Constants::NI_MAXSERV,
                           flags)

        unless err == 0 then
          raise SocketError, gai_strerror(err)
        end

        sa_family = SockAddr_In.new(sockaddr)[:sin_family]

        name_info[0] = Socket::Constants::AF_TO_FAMILY[sa_family]
        name_info[1] = service.read_string
        name_info[3] = node.read_string
      end
    end
  end

  name_info[2] = name_info[3] if name_info[2].nil?
  name_info
end

.getpeername(descriptor) ⇒ Object 



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# File 'lib/rubysl/socket/socket.rb', line 369

def self.getpeername(descriptor)
  FFI::MemoryPointer.new :char, 128 do |sockaddr_storage_p|
    FFI::MemoryPointer.new :socklen_t do |len_p|
      len_p.write_int 128

      err = _getpeername descriptor, sockaddr_storage_p, len_p

      Errno.handle 'getpeername(2)' unless err == 0

      sockaddr_storage_p.read_string len_p.read_int
    end
  end
end

.getsockname(descriptor) ⇒ Object 



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# File 'lib/rubysl/socket/socket.rb', line 383

def self.getsockname(descriptor)
  FFI::MemoryPointer.new :char, 128 do |sockaddr_storage_p|
    FFI::MemoryPointer.new :socklen_t do |len_p|
      len_p.write_int 128

      err = _getsockname descriptor, sockaddr_storage_p, len_p

      Errno.handle 'getsockname(2)' unless err == 0

      sockaddr_storage_p.read_string len_p.read_int
    end
  end
end

.getsockopt(descriptor, level, optname) ⇒ Object 



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# File 'lib/rubysl/socket/socket.rb', line 253

def self.getsockopt(descriptor, level, optname)
  FFI::MemoryPointer.new 256 do |val| # HACK magic number
    FFI::MemoryPointer.new :socklen_t do |length|
      length.write_int 256 # HACK magic number

      err = _getsockopt descriptor, level, optname, val, length

      Errno.handle "Unable to get socket option" unless err == 0

      return val.read_string(length.read_int)
    end
  end
end

.pack_sockaddr_in(host, port, family, type, flags) ⇒ Object 



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# File 'lib/rubysl/socket/socket.rb', line 397

def self.pack_sockaddr_in(host, port, family, type, flags)
  hints = Addrinfo.new
  hints[:ai_family] = family
  hints[:ai_socktype] = type
  hints[:ai_flags] = flags

  if host && host.empty?
    host = "0.0.0.0"
  end

  res_p = FFI::MemoryPointer.new :pointer

  err = _getaddrinfo host, port.to_s, hints.pointer, res_p

  raise SocketError, gai_strerror(err) unless err == 0

  return [] if res_p.read_pointer.null?

  res = Addrinfo.new res_p.read_pointer

  return res[:ai_addr].read_string(res[:ai_addrlen])

ensure
  hints.free if hints

  if res_p then
    ptr = res_p.read_pointer

    freeaddrinfo ptr if ptr and not ptr.null?

    res_p.free
  end
end

.unpack_sockaddr_in(sockaddr, reverse_lookup) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/rubysl/socket/socket.rb', line 431

def self.unpack_sockaddr_in(sockaddr, reverse_lookup)
  family, port, host, ip = getnameinfo sockaddr, Socket::Constants::NI_NUMERICHOST | Socket::Constants::NI_NUMERICSERV, reverse_lookup
  # On some systems this doesn't fail for families other than AF_INET(6)
  # so we raise manually here.
  raise ArgumentError, 'not an AF_INET/AF_INET6 sockaddr' unless family =~ /AF_INET/
  return host, ip, port.to_i
end