Added tag 0.15 for changeset 3dae37c40d73

.hgignore

@@ -1,4 +1,3 @@
-^debian/liblinux-netlink-ruby
 ~$
 ^.config-liblinux-netlink-ruby
-^debian/files$
+^debian/$

debian/changelog

@@ -1,43 +0,0 @@
-linux-netlink-ruby (0.11-1+squeeze1) oldstable; urgency=low
-
-  * New upstream version.
-
- -- Patrick J Cherry <patrick@bytemark.co.uk>  Fri, 05 Jul 2013 13:52:09 +0100
-
-linux-netlink-ruby (0.10-6) stable; urgency=low
-
-  * Add ip rule support
-
- -- Nick Thomas <nick@bytemark.co.uk>  Thu,  5 Jul 2012 15:19:42 +0100
-
-linux-netlink-ruby (0.10-5) stable; urgency=low
-
-  * Updated rattr constants to work with linux 3.2.
-  * Updated link handler to have new rattrs. 
-
- -- Patrick J Cherry <patrick@bytemark.co.uk>  Mon, 11 Jun 2012 10:53:37 +0100
-
-linux-netlink-ruby (0.10-4) unstable; urgency=low
-
-  * Removed dependency on gcc, in favour of having arch-dependent packages
-    which rely on build-time ascertation of sizeof size_t.
-
- -- Patrick J Cherry <patrick@bytemark.co.uk>  Tue, 24 Jan 2012 15:56:46 +0000
-
-linux-netlink-ruby (0.10-3) unstable; urgency=low
-
-  * Updated version number to cover the previous changes.
-
- -- Steve Kemp <steve@bytemark.co.uk>  Thu, 12 Jan 2012 12:00:21 +0000
-
-linux-netlink-ruby (0.10-2) unstable; urgency=low
-
-  * Added NlSocket.open and scope handling.
-
- -- Matthew Bloch <matthew@bytemark.co.uk>  Wed, 18 May 2011 15:27:00 +0100
-
-linux-netlink-ruby (0.10-1) unstable; urgency=low
-
-  * Initial release.
-
- -- Patrick J Cherry <patrick@bytemark.co.uk>  Thu, 12 May 2011 17:17:45 +0100

debian/compat

@@ -1 +0,0 @@
-7

debian/control

@@ -1,39 +0,0 @@
-Source: linux-netlink-ruby
-Maintainer: Matthew Bloch <matthew@bytemark.co.uk>
-Uploaders: Patrick J Cherry <patrick@bytemark.co.uk>
-Section: ruby
-Priority: optional
-Build-Depends:  debhelper (>= 7), cdbs, ruby1.8, ruby1.9.1, ruby-pkg-tools, rake
-Standards-Version: 3.8.0
-
-Package: liblinux-netlink-ruby
-Architecture: all
-Depends: liblinux-netlink-ruby1.8 | liblinux-netlink-ruby1.9.1, ${misc:Depends}
-Description: Netlink socket library for Ruby
- This library provides an API for using a Linux Netlink socket, for doing
- things like manipulating IP interfaces and routes programmatically, and
- capturing packets from ULOG.
- .
- This is the metapackage for all versions of Ruby.
-
-Package: liblinux-netlink-ruby1.8
-Architecture: any
-Depends: ruby1.8 (>= 1.8.7), libffi-ruby1.8, ${misc:Depends}
-Description: Netlink socket library for Ruby 1.8
- This library provides an API for using a Linux Netlink socket, for doing
- things like manipulating IP interfaces and routes programmatically, and
- capturing packets from ULOG.
- .
- This is the version for Ruby 1.8.7.
- 
-
-Package: liblinux-netlink-ruby1.9.1
-Architecture: any
-Depends: ruby1.9.1, libffi-ruby1.9.1, ${misc:Depends}
-Description: Netlink socket library for Ruby 1.9.1
- This library provides an API for using a Linux Netlink socket, for doing
- things like manipulating IP interfaces and routes programmatically, and
- capturing packets from ULOG.
- .
- This is the version for Ruby 1.9.1.
-

debian/copyright

@@ -1,20 +0,0 @@
-Ruby Netlink
-============
-
-Copyright (c) 2011 Bytemark Computer Consulting Ltd
-
-Licence:
-
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful, but
-WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-General Public License for more details.
-
-On Debian GNU/Linux systems, the complete text of the GNU General Public
-License can be found in ‘/usr/share/common-licenses/GPL’ or in the dpkg
-source as the file ‘COPYING’

debian/liblinux-netlink-ruby1.8.examples

@@ -1 +0,0 @@
-examples/*

debian/liblinux-netlink-ruby1.9.1.examples

@@ -1 +0,0 @@
-examples/*

debian/rules

@@ -1,11 +0,0 @@
-#!/usr/bin/make -f
-#
-
-include /usr/share/cdbs/1/rules/debhelper.mk
-include /usr/share/ruby-pkg-tools/1/class/ruby-setup-rb.mk
-
-makebuilddir::
-	rake lib/linux/c_struct_sizeof_size_t.rb
-
-clean::
-	rake clean

lib/linux/constants.rb

@@ -29,8 +29,8 @@ module Linux
   NETLINK_SCSITRANSPORT	= 18
   NETLINK_ECRYPTFS	= 19
   NETLINK_RDMA      = 20
-  NETLINK_CRYPTO    = 21  
+  NETLINK_CRYPTO    = 21
- 
+
   NLM_F_REQUEST		= 1
   NLM_F_MULTI		= 2
   NLM_F_ACK		= 4
@@ -40,72 +40,74 @@ module Linux
   NLM_F_MATCH		= 0x200
   NLM_F_ATOMIC		= 0x400
   NLM_F_DUMP		= (NLM_F_ROOT|NLM_F_MATCH)
-  
+
   NLM_F_REPLACE		= 0x100
   NLM_F_EXCL		= 0x200
   NLM_F_CREATE		= 0x400
   NLM_F_APPEND		= 0x800
 
   NLMSG_ALIGNTO		= 4	# same on i686 and x86_64
-  
+
   NLMSG_NOOP		= 0x1
   NLMSG_ERROR		= 0x2
   NLMSG_DONE		= 0x3
   NLMSG_OVERRUN		= 0x4
-  
+
   NETLINK_ADD_MEMBERSHIP	= 1
   NETLINK_DROP_MEMBERSHIP	= 2
   NETLINK_PKTINFO		= 3
   NETLINK_BROADCAST_ERROR	= 4
   NETLINK_NO_ENOBUFS		= 5
-  
+  NETLINK_RX_RING	= 6
+  NETLINK_TX_RING = 7
+
   NETLINK_UNCONNECTED		= 0
   NETLINK_CONNECTED		= 1
-  
+
   NLA_F_NESTED			= (1 << 15)
   NLA_F_NET_BYTEORDER		= (1 << 14)
   NLA_TYPE_MASK			= ~(NLA_F_NESTED | NLA_F_NET_BYTEORDER)
-  
+
   NLA_ALIGNTO			= 4	# same on i686 and x86_64
-  
+
   # from linux/rtnetlink.h.
   RTM_NEWLINK		= 16
   RTM_DELLINK		= 17
   RTM_GETLINK		= 18
   RTM_SETLINK		= 19
-  
+
-  RTM_NEWADDR		= 20     
+  RTM_NEWADDR		= 20
   RTM_DELADDR		= 21
   RTM_GETADDR		= 22
-  
+
   RTM_NEWROUTE		= 24
   RTM_DELROUTE		= 25
   RTM_GETROUTE		= 26
-  
+
   RTM_NEWNEIGH		= 28
   RTM_DELNEIGH		= 29
   RTM_GETNEIGH		= 30
-  
+
   RTM_NEWRULE		= 32
   RTM_DELRULE		= 33
   RTM_GETRULE		= 34
-  
+
   RTM_NEWQDISC		= 36
   RTM_DELQDISC		= 37
   RTM_GETQDISC		= 38
-  
+
   RTM_NEWTCLASS		= 40
   RTM_DELTCLASS		= 41
   RTM_GETTCLASS		= 42
-  
+
   RTM_NEWTFILTER	= 44
   RTM_DELTFILTER	= 45
   RTM_GETTFILTER	= 46
-  
+
   RTM_NEWACTION		= 48
   RTM_DELACTION		= 49
   RTM_GETACTION		= 50
-  
+
   RTM_NEWPREFIX		= 52
   RTM_GETMULTICAST	= 58
   RTM_GETANYCAST	= 62
@@ -113,16 +115,25 @@ module Linux
   RTM_NEWNEIGHTBL	= 64
   RTM_GETNEIGHTBL	= 66
   RTM_SETNEIGHTBL	= 67
-  
+
   RTM_NEWNDUSEROPT	= 68
 
   RTM_NEWADDRLABEL	= 72
   RTM_DELADDRLABEL	= 73
   RTM_GETADDRLABEL	= 74
-  
+
   RTM_GETDCB		= 78
   RTM_SETDCB		= 79
 
+
+  RTM_NEWNETCONF = 80
+  RTM_GETNETCONF = 82
+
+  RTM_NEWMDB = 84
+  RTM_DELMDB = 85
+  RTM_GETMDB = 86
+
+
   # RT#type
   RTN_UNSPEC		= 0
   RTN_UNICAST		= 1
@@ -136,7 +147,7 @@ module Linux
   RTN_THROW		= 9
   RTN_NAT		= 10
   RTN_XRESOLVE		= 11
-  
+
   # RT#protocol
   RTPROT_UNSPEC		= 0
   RTPROT_REDIRECT	= 1
@@ -152,7 +163,8 @@ module Linux
   RTPROT_XORP		= 14
   RTPROT_NTK		= 15
   RTPROT_DHCP		= 16
-  
+  RTPROT_MROUTED = 17
+
   # RT#scope, IFAddr#scope
   RT_SCOPE_UNIVERSE	= 0
   RT_SCOPE_SITE		= 200
@@ -172,7 +184,7 @@ module Linux
   RT_TABLE_DEFAULT	= 253
   RT_TABLE_MAIN		= 254
   RT_TABLE_LOCAL	= 255
-  
+
   # routing message attributes
   RTA_UNSPEC		= 0
   RTA_DST		= 1
@@ -188,7 +200,13 @@ module Linux
   RTA_CACHEINFO		= 12
   RTA_TABLE		= 15
   RTA_MARK		= 16
-  
+  RTA_MFC_STATS = 17
+
+  # Keys for RT#nh_flags
+  RTNH_F_DEAD	    = 1    # Nexthop is dead (used by multipath)
+  RTNH_F_PERVASIVE	= 2  # Do recursive gateway lookup
+  RTNH_F_ONLINK    = 4   # Gateway is forced on link
+
   # Keys for RT#metrics
   RTAX_UNSPEC		= 0
   RTAX_LOCK		= 1
@@ -205,7 +223,8 @@ module Linux
   RTAX_FEATURES		= 12
   RTAX_RTO_MIN		= 13
   RTAX_INITRWND		= 14
-    
+  RTAX_QUICKACK   = 15
+
   # from linux/if_link.h
   IFLA_UNSPEC		= 0
   IFLA_ADDRESS		= 1
@@ -233,11 +252,29 @@ module Linux
   IFLA_STATS64		= 23
   IFLA_VF_PORTS		= 24
   IFLA_PORT_SELF	= 25
-  IFLA_AF_SPEC    = 26
+  IFLA_AF_SPEC          = 26
-  IFLA_GROUP      = 27
+  IFLA_GROUP            = 27
-  IFLA_NET_NS_FD  = 28
+  IFLA_NET_NS_FD        = 28
-  IFLA_EXT_MASK   = 29 
+  IFLA_EXT_MASK   = 29
-  IFLA_PROMISCUITY = 30
+  IFLA_PROMISCUITY      = 30
+  IFLA_NUM_TX_QUEUES    = 31
+  IFLA_NUM_RX_QUEUES    = 32
+  IFLA_CARRIER          = 33
+  IFLA_PHYS_PORT_ID  = 34
+
+  BRIDGE_MODE_UNSPEC = 0
+  BRIDGE_MODE_HAIRPIN = 1
+
+  IFLA_BRPORT_UNSPEC        = 0
+  IFLA_BRPORT_STATE         = 1 # Spanning tree state
+  IFLA_BRPORT_PRIORITY      = 2 # "             priority
+  IFLA_BRPORT_COST          = 3 # "             cost
+  IFLA_BRPORT_MODE          = 4 # mode (hairpin)
+  IFLA_BRPORT_GUARD         = 5 # bpdu guard
+  IFLA_BRPORT_PROTECT       = 6 # root port protection
+  IFLA_BRPORT_FAST_LEAVE    = 7 # multicast fast leave
+  IFLA_BRPORT_LEARNING      = 8 # mac learning
+  IFLA_BRPORT_UNICAST_FLOOD = 9 # flood unicast traffic
 
   IFLA_INFO_UNSPEC	= 0
   IFLA_INFO_KIND	= 1	# "vlan", "gre" etc
@@ -250,23 +287,28 @@ module Linux
   IFLA_VLAN_FLAGS	= 2	# struct ifla_vlan_flags
   IFLA_VLAN_EGRESS_QOS	= 3	# followed by instance of IFLA_VLAN_QOS_*
   IFLA_VLAN_INGRESS_QOS	= 4	# followed by instance of IFLA_VLAN_QOS_*
-  
+  IFLA_VLAN_PROTOCOL    = 5
+
   IFLA_VLAN_QOS_UNSPEC	= 0
-  IFLA_VLAN_QOS_MAPPING	= 1
+  IFLA_VLAN_QOS_MAPPING = 1
-  
+
   IFLA_MACVLAN_UNSPEC	= 0
   IFLA_MACVLAN_MODE	= 1
-  
+  IFLA_MACVLAN_FLAGS	= 2
+
   MACVLAN_MODE_PRIVATE	= 1
   MACVLAN_MODE_VEPA	= 2
   MACVLAN_MODE_BRIDGE	= 4
   MACVLAN_MODE_PASSTHRU	= 8
-  
+
+  # TODO: VXLAN and VF stuff is missing here
+
   # linux/if_vlan.h
   VLAN_FLAG_REORDER_HDR		= 0x1
   VLAN_FLAG_GVRP		= 0x2
   VLAN_FLAG_LOOSE_BINDING	= 0x4
-  
+  VLAN_FLAG_MVRP          = 0x8
+
   # from linux/if_addr.h
   IFA_UNSPEC		= 0
   IFA_ADDRESS		= 1
@@ -287,7 +329,7 @@ module Linux
   IFA_F_TENTATIVE	= 0x40
   IFA_F_PERMANENT	= 0x80
 
-  # from linux/if_arp.h
+  # from linux/if_arp.h - selected subset
   ARPHRD_NETROM		= 0
   ARPHRD_ETHER		= 1
   ARPHRD_EETHER		= 2
@@ -345,7 +387,7 @@ module Linux
   NF_INET_LOCAL_OUT	= 3
   NF_INET_POST_ROUTING	= 4
   NF_INET_NUMHOOKS	= 5
-    
+
   NFPROTO_UNSPEC	= 0
   NFPROTO_IPV4		= 2
   NFPROTO_ARP		= 3
@@ -357,7 +399,7 @@ module Linux
   IPQ_COPY_NONE		= 0
   IPQ_COPY_META		= 1
   IPQ_COPY_PACKET	= 2
-  
+
   IPQM_MODE		= 17
   IPQM_VERDICT		= 18
   IPQM_PACKET		= 19
@@ -366,22 +408,22 @@ module Linux
   # linux/netfilter_ipv4/ipt_ULOG.h
   ULOG_MAC_LEN		= 80
   ULOG_PREFIX_LEN	= 32
-  
+
   # linux/netfilter/x_tables.h
   XT_TABLE_MAXNAMELEN	= 32
-  
+
   XT_CONTINUE		= 0xffffffff
   XT_RETURN		= (-NF_REPEAT - 1)
 
   XT_INV_PROTO		= 0x40
-  
+
   # linux/netfilter_ipv4/ip_tables.h
   IPT_TABLE_MAXNAMELEN	= XT_TABLE_MAXNAMELEN
-  
+
   IPT_F_FRAG		= 0x01
   IPT_F_GOTO		= 0x02
   IPT_F_MASK		= 0x03
-  
+
   IPT_INV_VIA_IN	= 0x01
   IPT_INV_VIA_OUT	= 0x02
   IPT_INV_TOS		= 0x04
@@ -390,17 +432,17 @@ module Linux
   IPT_INV_FRAG		= 0x20
   IPT_INV_PROTO		= XT_INV_PROTO
   IPT_INV_MASK		= 0x7f
-  
+
   IPT_BASE_CTL			= 64
 
   IPT_SO_SET_REPLACE		= IPT_BASE_CTL
   IPT_SO_SET_ADD_COUNTERS	= IPT_BASE_CTL + 1
-  
+
   IPT_SO_GET_INFO		= IPT_BASE_CTL
   IPT_SO_GET_ENTRIES		= IPT_BASE_CTL + 1
   IPT_SO_GET_REVISION_MATCH	= IPT_BASE_CTL + 2
   IPT_SO_GET_REVISION_TARGET	= IPT_BASE_CTL + 3
-  
+
   IPT_CONTINUE			= XT_CONTINUE
   IPT_RETURN			= XT_RETURN
 end

lib/linux/netlink/nlsocket.rb

@@ -25,7 +25,7 @@ module Netlink
     # Check the sockaddr on a received message. Raises an error if the AF
     # is not AF_NETLINK or the PID is not 0 (this is important for security)
     def self.check_sockaddr(str)
-      af, pad, pid, groups = str.unpack(SOCKADDR_PACK)
+      af, _, pid, _ = str.unpack(SOCKADDR_PACK)
       raise "Bad AF #{af}!" if af != Socket::AF_NETLINK
       raise "Bad PID #{pid}!" if pid != 0
     end
@@ -135,8 +135,8 @@ module Netlink
     # (Compare: rtnl_talk in lib/libnetlink.c, with answer=NULL)
     def cmd(type, msg, flags=NLM_F_REQUEST, resp_type=NLMSG_ERROR, timeout=@timeout, sockaddr=SOCKADDR_DEFAULT)
       send_request(type, msg, flags|NLM_F_ACK, sockaddr)
-      receive_responses(true, timeout) do |type,msg|
+      receive_responses(true, timeout) do |rtype,rmsg|
-        return msg if type == resp_type
+        return rmsg if rtype == resp_type
         false
       end
     end
@@ -144,7 +144,7 @@ module Netlink
     # Discard all waiting messages
     def drain
       while select([@socket], nil, nil, 0)
-        mesg, sender, rflags, controls = @socket.recvmsg
+        mesg, _, _, _ = @socket.recvmsg
         raise EOFError unless mesg
       end
     end
@@ -209,7 +209,7 @@ module Netlink
     # kernel closes the socket.
     def recvmsg(timeout=@timeout)
       if select([@socket], nil, nil, timeout)
-        mesg, sender, rflags, controls = @socket.recvmsg
+        mesg, sender, _, _ = @socket.recvmsg
         raise EOFError unless mesg
         sender = sender.to_sockaddr if sender.respond_to? :to_sockaddr
         NLSocket.check_sockaddr(sender)

lib/linux/netlink/route/link_handler.rb

@@ -65,6 +65,9 @@ module Netlink
     rtattr :net_ns_fd, IFLA_NET_NS_FD
     rtattr :ext_mask, IFLA_EXT_MASK   
     rtattr :promiscuity, IFLA_PROMISCUITY
+    rtattr :num_tx_queues, IFLA_NUM_TX_QUEUES
+    rtattr :num_rx_queues, IFLA_NUM_RX_QUEUES
+    rtattr :carrier, IFLA_CARRIER
  
     # Return the best stats available (64bit or 32bit)
     def stats
@@ -119,6 +122,7 @@ module Netlink
       :unpack => lambda { |str,obj| VlanFlags.parse(str) }
     rtattr :egress_qos, IFLA_VLAN_EGRESS_QOS
     rtattr :ingress_qos, IFLA_VLAN_INGRESS_QOS
+    rtattr :protocol, IFLA_VLAN_PROTOCOL, :ushort
   end
 
   module Route

lib/linux/netlink/route/vlan_handler.rb

@@ -8,12 +8,12 @@ module Netlink
       def clear_cache
         # No cache
       end
-      
+
       def list(filter={}, &blk)
         @rtsocket.link.list(filter.merge(:kind=>"vlan"))
       end
       alias :each :list
-            
+
       # Higher-level API to manipulate VLAN interface.
       #    nl.vlans.add(
       #      :link=>"lo",
@@ -24,15 +24,15 @@ module Netlink
       def add(opt)
         @rtsocket.link.add(vlan_options(opt))
       end
-      
+
       def change(opt)
         @rtsocket.link.change(vlan_options(opt))
       end
-      
+
       def replace(opt)
         @rtsocket.link.replace(vlan_options(opt))
       end
-      
+
       # Delete vlan given :link and :vlan_id. If you want to delete
       # by :index then call link.delete instead.
       def delete(opt)
@@ -59,6 +59,7 @@ module Netlink
         end
         li.data.egress_qos = opt.delete(:egress_qos) if opt.has_key?(:egress_qos)
         li.data.ingress_qos = opt.delete(:ingress_qos) if opt.has_key?(:ingress_qos)
+        li.data.protocol = opt.delete(:protocol) if opt.has_key?(:protocol)
         opt
       end
     end

netlinkrb.gemspec

@@ -5,9 +5,9 @@ $:.unshift lib unless $:.include? lib
 
 Gem::Specification.new do |s|
   s.name = "netlinkrb"
-  s.version = "0.11"
+  s.version = "0.12"
   s.platform = Gem::Platform::RUBY
-  s.authors = ["Brian Candler", "Patrick Cherry", "Alex Young"]
+  s.authors = ["Brian Candler", "Matthew Bloch", "Patrick Cherry", "Alex Young"]
   s.email = ["matthew@bytemark.co.uk"]
   s.summary = "Interface to Linux' Netlink API"
   s.description = "Ruby native interface to the Netlink API which avoids shelling out to command-line tools as much as possible."

test/t_route.rb

@@ -16,11 +16,12 @@ class TestAddr < Test::Unit::TestCase
   context "With netlink route socket" do
     setup do
       @ip = $ip
+      @ifname = nil
     end
 
     teardown do
       begin
-        delete_test_interface
+        delete_test_interface(@ifname)
       rescue KeyError, IndexError
         # Do nothing
       end
@@ -38,28 +39,29 @@ class TestAddr < Test::Unit::TestCase
             :kind => "dummy"
           )
         )
+      rescue Errno::EOPNOTSUPP
+        # Ugh, fall back to eth0
+        ifname = "eth0"
       rescue Errno::EPERM => err
-        if self.respond_to?(:skip)
+        do_skip err.to_s
-          skip err.to_s
-        else
-          puts "Skipping #{self.method_name} -- #{err.to_s}"
-          return nil
-        end
       end
 
       return ifname
     end
 
     def set_interface_up(ifname)
-        link = @ip.link.list.find{|l| l.ifname == ifname}
+      link = @ip.link.list.find{|l| l.ifname == ifname}
 
-        #
+      return if link.nil?
-        # Bring the link up
+      return unless link.linkinfo and "dummy" == link.linkinfo.kind
-        #
+
-        @ip.link.change(
+      #
-         :index => link.index,
+      # Bring the link up
-         :flags => link.flags | Linux::IFF_UP | Linux::IFF_RUNNING
+      #
-       )
+      @ip.link.change(
+        :index => link.index,
+        :flags => link.flags | Linux::IFF_UP | Linux::IFF_RUNNING
+      )
 
       link = @ip.link.list.find{|l| l.ifname == ifname}
 
@@ -71,6 +73,7 @@ class TestAddr < Test::Unit::TestCase
       link = @ip.link.list.find{|l| l.ifname == ifname}
 
       return if link.nil?
+      return unless link.linkinfo and "dummy" == link.linkinfo.kind
       return unless link.flags == (link.flags | Linux::IFF_UP | Linux::IFF_RUNNING)
 
       #
@@ -87,19 +90,39 @@ class TestAddr < Test::Unit::TestCase
       assert_equal(0, link.flags & Linux::IFF_RUNNING, "Link still has the IFF_RUNNING flag set") 
     end
 
-    def delete_test_interface(ifname = "test_#{$$}")
+    def delete_test_interface(ifname) 
+      unless @ip.link[ifname] and @ip.link[ifname].linkinfo and "dummy" == @ip.link[ifname].linkinfo.kind
+        return nil
+      end
+
       begin
         set_interface_down(ifname)
       ensure
         @ip.link.delete(:index => ifname)
       end
     end
-      
-    test "Add and remove dummy interface" do
-      ifname = create_test_interface
-      return if ifname.nil?
 
-      delete_test_interface(ifname)
+    def do_skip(msg)
+      if self.respond_to?(:skip)
+        skip msg
+      else
+        puts "Skipping #{self.method_name} -- #{msg}"
+      end
+      return nil
+    end
+
+    test "Add and remove dummy interface" do
+      @ifname = create_test_interface
+      return if @ifname.nil?
+      
+      link = @ip.link.list.find{|x| x.ifname == @ifname} 
+      return if link.nil?
+
+      unless link.linkinfo and "dummy" == link.linkinfo.kind
+        return do_skip("Could not create dummy interface")
+      end
+
+      delete_test_interface(@ifname)
     end
     
     def addrlist(opt = {:index=>"lo"})
@@ -107,23 +130,26 @@ class TestAddr < Test::Unit::TestCase
     end
 
     def add_and_remove_addr(testaddr, pfx)
-      ifname = create_test_interface
+      @ifname = create_test_interface
-      return if ifname.nil?
+      return if @ifname.nil?
 
-      addrs1 = addrlist({:index => ifname})
+      link = @ip.link.list.find{|x| x.ifname == @ifname} 
+      return if link.nil?
+      
+      addrs1 = addrlist({:index => @ifname})
       assert !addrs1.include?(testaddr)
 
-      @ip.addr.add(:index=>ifname, :local=>testaddr, :prefixlen=>pfx)
+      @ip.addr.add(:index=>@ifname, :local=>testaddr, :prefixlen=>pfx)
       assert_raises(Errno::EEXIST) {
-        @ip.addr.add(:index=>ifname, :local=>testaddr, :prefixlen=>pfx)
+        @ip.addr.add(:index=>@ifname, :local=>testaddr, :prefixlen=>pfx)
       }
 
-      addrs2 = addrlist({:index => ifname})
+      addrs2 = addrlist({:index => @ifname})
       assert addrs2.include?(testaddr), "#{addrs2.inspect} doesn't include #{testaddr}"
       
-      @ip.addr.delete(:index=>ifname, :local=>testaddr, :prefixlen=>pfx)
+      @ip.addr.delete(:index=>@ifname, :local=>testaddr, :prefixlen=>pfx)
       
-      addrs3 = addrlist({:index => ifname})
+      addrs3 = addrlist({:index => @ifname})
       assert_equal addrs1, addrs3
     end
 
@@ -158,22 +184,24 @@ class TestAddr < Test::Unit::TestCase
     end
   
     test "Add and remove vlan" do
-      ifname = create_test_interface
+      @ifname = create_test_interface
-      return if ifname.nil?
+      return if @ifname.nil?
 
-      vlans1 = vlanlist(ifname)
+      link = @ip.link.list.find{|x| x.ifname == @ifname}
+      return if link.nil?
+
+      vlans1 = vlanlist(@ifname)
       assert !vlans1.include?(1234)
 
-      @ip.vlan.add(:link=>ifname, :vlan_id=>1234)
+      @ip.vlan.add(:link=>@ifname, :vlan_id=>1234)
 
-      vlans2 = vlanlist(ifname)
+      vlans2 = vlanlist(@ifname)
       assert vlans2.include?(1234)
 
-      @ip.vlan.delete(:link=>ifname, :vlan_id=>1234)
+      @ip.vlan.delete(:link=>@ifname, :vlan_id=>1234)
 
-      vlans3 = vlanlist(ifname)
+      vlans3 = vlanlist(@ifname)
       assert_equal vlans1, vlans3
-      @ip.link.delete(:index => ifname)
     end
 
     def routes
@@ -191,13 +219,17 @@ class TestAddr < Test::Unit::TestCase
     end
     
     def add_and_remove_route(info)
-      ifname = create_test_interface
+      @ifname = create_test_interface
-      return if ifname.nil?
+      return if @ifname.nil?
 
-      set_interface_up(ifname) 
+      set_interface_up(@ifname) 
 
-      info[:oif] = ifname
+      info[:oif] = @ifname
-      ifidx = @ip.link.list.find{|x| x.ifname == info[:oif]}.index
+
+      link = @ip.link.list.find{|x| x.ifname == info[:oif]}
+      return if link.nil?
+
+      ifidx = link.index
 
       assert_equal 0, routes.select { |x| x == [info[:dst], info[:dst_len], ifidx] }.size