Add ntf_bind() method to YnlFamily for binding the netlink socket without joining a multicast group. This enables receiving unicast notifications through the existing poll_ntf/check_ntf path. The OVS packet family sends MISS and ACTION upcalls via genlmsg_unicast() to a per-vport PID rather than through a multicast group. The existing ntf_subscribe() couples bind() with setsockopt(ADD_MEMBERSHIP), which does not fit the unicast case. ntf_bind() provides the bind-only alternative, with the address defaulting to (0, 0) but exposed as an explicit argument. Signed-off-by: Minxi Hou --- tools/net/ynl/pyynl/lib/ynl.py | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/tools/net/ynl/pyynl/lib/ynl.py b/tools/net/ynl/pyynl/lib/ynl.py index f63c6f828735..3cf6fa96347f 100644 --- a/tools/net/ynl/pyynl/lib/ynl.py +++ b/tools/net/ynl/pyynl/lib/ynl.py @@ -680,6 +680,7 @@ class YnlFamily(SpecFamily): Notification API: ynl.ntf_subscribe(mcast_name) -- join a multicast group + ynl.ntf_bind(addr=(0, 0)) -- bind socket for unicast notifications ynl.check_ntf() -- drain pending notifications ynl.poll_ntf(duration=None) -- yield notifications @@ -748,6 +749,10 @@ class YnlFamily(SpecFamily): self.sock.setsockopt(Netlink.SOL_NETLINK, Netlink.NETLINK_ADD_MEMBERSHIP, mcast_id) + def ntf_bind(self, addr=(0, 0)): + """Bind socket for receiving unicast notifications.""" + self.sock.bind(addr) + def set_recv_dbg(self, enabled): self._recv_dbg = enabled -- 2.54.0