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nlpacket:: add netconf support (RTM_GETNETCONF/RTM_NEWNETCONF)

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$ cd python-nlmanager/examples
$ ./netconf_show.py
    2018-06-01 16:59:02,398   DEBUG: TXed RTM_GETNETCONF, length 32, seq 1, pid 14202, flags 0x0 ()

      Netlink Header
       1: 0x20000000   ...  Length 0x00000020 (32)
       2: 0x52000503  R...  Type 0x0052 (82 - RTM_GETNETCONF), Flags 0x0305 (NLM_F_REQUEST, NLM_F_ACK, NLM_F_DUMP)
       3: 0x01000000  ....  Sequence Number 0x00000001 (1)
       4: 0x7a370000  z7..  Process ID 0x0000377a (14202)
      Service Header
       5: 0x00000000  ....  Family 0x00 (0), Device Type 0x0000 (0 - ARPHRD_NETROM)
       6: 0x00000000  ....  Interface Index 0x00000000 (0)
       7: 0x00000000  ....  Device Flags 0x00000000 ()
       8: 0x00000000  ....  Change Mask 0x00000000
      Attributes

    Attributes Summary
    {}

    2018-06-01 16:59:02,401   DEBUG: RXed RTM_NEWNETCONF, length 68, seq 1, pid 14202, flags 0x2

      Netlink Header
       1: 0x44000000  D...  Length 0x00000044 (68)
       2: 0x50000200  P...  Type 0x0050 (80 - RTM_NEWNETCONF), Flags 0x0002 (NLM_F_MULTI)
       3: 0x01000000  ....  Sequence Number 0x00000001 (1)
       4: 0x7a370000  z7..  Process ID 0x0000377a (14202)
      Service Header
       1: 0x00000002  ....  Family 0x02 (2)
      Attributes
       5: 0x08000100  ....  Length 0x0008 (8), Type 0x0001 (1) NETCONFA_IFINDEX
       6: 0x01000000  ....  1
       7: 0x08000200  ....  Length 0x0008 (8), Type 0x0002 (2) NETCONFA_FORWARDING
       8: 0x01000000  ....  1
       9: 0x08000300  ....  Length 0x0008 (8), Type 0x0003 (3) NETCONFA_RP_FILTER
      10: 0x00000000  ....  0
      11: 0x08000400  ....  Length 0x0008 (8), Type 0x0004 (4) NETCONFA_MC_FORWARDING
      12: 0x00000000  ....  0
      13: 0x08000500  ....  Length 0x0008 (8), Type 0x0005 (5) NETCONFA_PROXY_NEIGH
      14: 0x00000000  ....  0
      15: 0x08000600  ....  Length 0x0008 (8), Type 0x0006 (6) NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN
      16: 0x01000000  ....  1

    Attributes Summary
    {'( 1) NETCONFA_IFINDEX': 1,
     '( 2) NETCONFA_FORWARDING': 1,
     '( 3) NETCONFA_RP_FILTER': 0,
     '( 4) NETCONFA_MC_FORWARDING': 0,
     '( 5) NETCONFA_PROXY_NEIGH': 0,
     '( 6) NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN': 1}

Signed-off-by: Julien Fortin <julien@cumulusnetworks.com>
This commit is contained in:
Julien Fortin
2018-08-29 17:21:54 +02:00
parent d00f527807
commit 3479a0c3bb
2 changed files with 120 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
ifupdown2/nlmanager/nlmanager.py
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@@ -129,6 +129,9 @@ class NetlinkManager(object):
def debug_route(self, enabled):
self._debug_set_clear((RTM_NEWROUTE, RTM_DELROUTE, RTM_GETROUTE), enabled)
def debug_netconf(self, enabled):
self._debug_set_clear((RTM_GETNETCONF, RTM_NEWNETCONF), enabled)
def debug_this_packet(self, mtype):
if mtype in self.debug:
return True
@@ -328,6 +331,9 @@ class NetlinkManager(object):
elif msgtype == RTM_NEWROUTE or msgtype == RTM_DELROUTE:
msg = Route(msgtype, nlpacket.debug, use_color=self.use_color)
elif msgtype in (RTM_GETNETCONF, RTM_NEWNETCONF):
msg = Netconf(msgtype, nlpacket.debug, use_color=self.use_color)
else:
raise Exception("RXed unknown netlink message type %s" % msgtype)
@@ -1019,3 +1025,20 @@ class NetlinkManager(object):
msg.build_message(self.sequence.next(), self.pid)
return self.tx_nlpacket_get_response(msg)
# =======
# Netconf
# =======
def netconf_dump(self):
"""
The attribute Netconf.NETCONFA_IFINDEX is available but don't let it fool you
it seems like the kernel doesn't really care about this attribute and will dump
everything according of the requested family (AF_UNSPEC for everything).
Device filtering needs to be done afterwards by the user.
"""
debug = RTM_GETNETCONF in self.debug
msg = Netconf(RTM_GETNETCONF, debug, use_color=self.use_color)
msg.body = pack('Bxxxiii', socket.AF_UNSPEC, 0, 0, 0)
msg.flags = NLM_F_REQUEST | NLM_F_DUMP | NLM_F_ACK
msg.build_message(self.sequence.next(), self.pid)
return self.tx_nlpacket_get_response(msg)