usa	2015-11-17 14:06:18 +0900 (Tue, 17 Nov 2015)

  New Revision: 52610

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=52610

  Log:
    * ext/socket/lib/socket.rb (Socket#recvmsg{,_nonblock}): default values
      of clen must be nil.
    
    * ext/socket/ancdata.c (bsock_sendmsg_internal): handle nil of clen.
      fixes test errors introduced at r52602.

  Modified files:
    trunk/ChangeLog
    trunk/ext/socket/ancdata.c
    trunk/ext/socket/lib/socket.rb
Index: ChangeLog
===================================================================
--- ChangeLog	(revision 52609)
+++ ChangeLog	(revision 52610)
@@ -1,3 +1,11 @@ https://github.com/ruby/ruby/blob/trunk/ChangeLog#L1
+Tue Nov 17 14:04:14 2015  NAKAMURA Usaku  <usa@r...>
+
+	* ext/socket/lib/socket.rb (Socket#recvmsg{,_nonblock}): default values
+	  of clen must be nil.
+
+	* ext/socket/ancdata.c (bsock_sendmsg_internal): handle nil of clen.
+	  fixes test errors introduced at r52602.
+
 Tue Nov 17 13:43:46 2015  NAKAMURA Usaku  <usa@r...>
 
 	* ext/socket/lib/socket.rb: UNIXSocket is not always exists.  fixes
Index: ext/socket/lib/socket.rb
===================================================================
--- ext/socket/lib/socket.rb	(revision 52609)
+++ ext/socket/lib/socket.rb	(revision 52610)
@@ -425,7 +425,7 @@ class BasicSocket < IO https://github.com/ruby/ruby/blob/trunk/ext/socket/lib/socket.rb#L425
   #       return ancdata.unix_rights[0]
   #     end
   #   }
-  def recvmsg(dlen = 4096, flags = 0, clen = 4096, scm_rights: false)
+  def recvmsg(dlen = 4096, flags = 0, clen = nil, scm_rights: false)
     __recvmsg(dlen, flags, clen, scm_rights)
   end
 
@@ -441,7 +441,7 @@ class BasicSocket < IO https://github.com/ruby/ruby/blob/trunk/ext/socket/lib/socket.rb#L441
   # By specifying `exception: false`, the _opts_ hash allows you to indicate
   # that recvmsg_nonblock should not raise an IO::WaitWritable exception, but
   # return the symbol :wait_writable instead.
-  def recvmsg_nonblock(dlen = 4096, flags = 0, clen = 4096,
+  def recvmsg_nonblock(dlen = 4096, flags = 0, clen = nil,
                        scm_rights: false, exception: true)
     __recvmsg_nonblock(dlen, flags, clen, scm_rights, exception)
   end
Index: ext/socket/ancdata.c
===================================================================
--- ext/socket/ancdata.c	(revision 52609)
+++ ext/socket/ancdata.c	(revision 52610)
@@ -1467,7 +1467,7 @@ bsock_recvmsg_internal(VALUE sock, https://github.com/ruby/ruby/blob/trunk/ext/socket/ancdata.c#L1467
 
     maxdatlen = NUM2SIZET(vmaxdatlen);
 #if defined(HAVE_STRUCT_MSGHDR_MSG_CONTROL)
-    maxctllen = NUM2SIZET(vmaxctllen);
+    maxctllen = NIL_P(vmaxctllen) ? 4096 : NUM2SIZET(vmaxctllen);
 #else
     if (!NIL_P(vmaxctllen))
         rb_raise(rb_eArgError, "control message not supported");

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