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merge revision(s) r44880: [Backport #9477]

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* lib/resolv.rb: Ignore name servers which cause EAFNOSUPPORT on
	  socket creation.
	  Reported by Bjoern Rennhak.  [ruby-core:60442] [Bug #9477]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@44977 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nagachika 2014-02-15 15:01:40 +00:00
parent d9e36580ef
commit af33a148ab
3 changed files with 21 additions and 7 deletions
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16
lib/resolv.rb
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@ -515,8 +515,9 @@ class Resolv
msg.rd = 1
msg.add_question(candidate, typeclass)
unless sender = senders[[candidate, nameserver, port]]
sender = senders[[candidate, nameserver, port]] =
requester.sender(msg, candidate, nameserver, port)
sender = requester.sender(msg, candidate, nameserver, port)
next if !sender
senders[[candidate, nameserver, port]] = sender
end
reply, reply_name = requester.request(sender, tout)
case reply.rcode
@ -725,7 +726,11 @@ class Resolv
af = Socket::AF_INET
end
next if @socks_hash[bind_host]
sock = UDPSocket.new(af)
begin
sock = UDPSocket.new(af)
rescue Errno::EAFNOSUPPORT
next # The kernel doesn't support the address family.
end
sock.do_not_reverse_lookup = true
sock.fcntl(Fcntl::F_SETFD, Fcntl::FD_CLOEXEC) if defined? Fcntl::F_SETFD
DNS.bind_random_port(sock, bind_host)
@ -740,11 +745,12 @@ class Resolv
end
def sender(msg, data, host, port=Port)
sock = @socks_hash[host.index(':') ? "::" : "0.0.0.0"]
return nil if !sock
service = [host, port]
id = DNS.allocate_request_id(host, port)
request = msg.encode
request[0,2] = [id].pack('n')
sock = @socks_hash[host.index(':') ? "::" : "0.0.0.0"]
return @senders[[service, id]] =
Sender.new(request, data, sock, host, port)
end
@ -765,6 +771,7 @@ class Resolv
attr_reader :data
def send
raise "@sock is nil." if @sock.nil?
@sock.send(@msg, 0, @host, @port)
end
end
@ -808,6 +815,7 @@ class Resolv
class Sender < Requester::Sender # :nodoc:
def send
raise "@sock is nil." if @sock.nil?
@sock.send(@msg, 0)
end
attr_reader :data