Build Windows Templates in RHV

roles/linux-system-roles.network/module_utils/network_lsr/ethtool.py

@@ -0,0 +1,56 @@
+# SPDX-License-Identifier: BSD-3-Clause
+
+import array
+import struct
+import fcntl
+import socket
+
+from .utils import Util
+
+ETHTOOL_GPERMADDR = 0x00000020
+SIOCETHTOOL = 0x8946
+MAX_ADDR_LEN = 32
+IFNAMESIZ = 16
+
+
+def get_perm_addr(ifname):
+    """
+    Return the Permanent address value for the specified interface using the
+    ETHTOOL_GPERMADDR ioctl command.
+
+    Please for further documentation, see:
+    https://github.com/torvalds/linux/blob/master/include/uapi/linux/ethtool.h#L734
+    https://github.com/torvalds/linux/blob/master/include/uapi/linux/ethtool.h#L1388
+    https://git.kernel.org/pub/scm/network/ethtool/ethtool.git/tree/ethtool.c#n4172
+    """
+    try:
+        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        sockfd = sock.fileno()
+        ifname = ifname.encode("utf-8")
+        if len(ifname) > IFNAMESIZ:
+            return None
+
+        ecmd = array.array(
+            "B",
+            struct.pack(
+                "II%is" % MAX_ADDR_LEN,
+                ETHTOOL_GPERMADDR,
+                MAX_ADDR_LEN,
+                b"\x00" * MAX_ADDR_LEN,
+            ),
+        )
+        ifreq = struct.pack("%isP" % IFNAMESIZ, ifname, ecmd.buffer_info()[0])
+
+        fcntl.ioctl(sockfd, SIOCETHTOOL, ifreq)
+        try:
+            res = ecmd.tobytes()
+        except AttributeError:  # tobytes() is not available in python2
+            res = ecmd.tostring()
+        _, size, perm_addr = struct.unpack("II%is" % MAX_ADDR_LEN, res)
+        perm_addr = Util.mac_ntoa(perm_addr[:size])
+    except IOError:
+        perm_addr = None
+    finally:
+        sock.close()
+
+    return perm_addr