ynl/lib/ynl.py

19 # Generic Netlink code which should really be in some library, but I can't quickly find one.
23 class Netlink:  class
24     # Netlink socket
32     # Netlink message
106     return f"Netlink error: {os.strerror(self.error)}\n{self.nl_msg}"
128         self.type = self._type & ~Netlink.NLA_TYPE_MASK
129         self.is_nest = self._type & Netlink.NLA_F_NESTED
201         if self.nl_type == Netlink.NLMSG_ERROR:
205         elif self.nl_type == Netlink.NLMSG_DONE:
211         if self.nl_flags & Netlink.NLM_F_ACK_TLVS and extack_off:
215                 if extack.type == Netlink.NLMSGERR_ATTR_MSG:
217                 elif extack.type == Netlink.NLMSGERR_ATTR_MISS_TYPE:
219                 elif extack.type == Netlink.NLMSGERR_ATTR_MISS_NEST:
221                 elif extack.type == Netlink.NLMSGERR_ATTR_OFFS:
223                 elif extack.type == Netlink.NLMSGERR_ATTR_POLICY:
243             if attr.type == Netlink.NL_POLICY_TYPE_ATTR_TYPE:
245                 policy['type'] = Netlink.AttrType(type).name
246             elif attr.type == Netlink.NL_POLICY_TYPE_ATTR_MIN_VALUE_S:
248             elif attr.type == Netlink.NL_POLICY_TYPE_ATTR_MAX_VALUE_S:
250             elif attr.type == Netlink.NL_POLICY_TYPE_ATTR_MIN_VALUE_U:
252             elif attr.type == Netlink.NL_POLICY_TYPE_ATTR_MAX_VALUE_U:
254             elif attr.type == Netlink.NL_POLICY_TYPE_ATTR_MIN_LENGTH:
256             elif attr.type == Netlink.NL_POLICY_TYPE_ATTR_MAX_LENGTH:
258             elif attr.type == Netlink.NL_POLICY_TYPE_ATTR_BITFIELD32_MASK:
260             elif attr.type == Netlink.NL_POLICY_TYPE_ATTR_MASK:
307     with socket.socket(socket.AF_NETLINK, socket.SOCK_RAW, Netlink.NETLINK_GENERIC) as sock:
308         sock.setsockopt(Netlink.SOL_NETLINK, Netlink.NETLINK_CAP_ACK, 1)
310         msg = _genl_msg(Netlink.GENL_ID_CTRL,
311                         Netlink.NLM_F_REQUEST | Netlink.NLM_F_ACK | Netlink.NLM_F_DUMP,
312                         Netlink.CTRL_CMD_GETFAMILY, 1)
325                     print("Netlink error:", nl_msg.error)
333                     if attr.type == Netlink.CTRL_ATTR_FAMILY_ID:
335                     elif attr.type == Netlink.CTRL_ATTR_FAMILY_NAME:
337                     elif attr.type == Netlink.CTRL_ATTR_MAXATTR:
339                     elif attr.type == Netlink.CTRL_ATTR_MCAST_GROUPS:
345                                 if entry_attr.type == Netlink.CTRL_ATTR_MCAST_GRP_NAME:
347                                 elif entry_attr.type == Netlink.CTRL_ATTR_MCAST_GRP_ID:
408         super().__init__(family_name, Netlink.NETLINK_GENERIC)
467             if self.proto == "netlink-raw":
476         # Note that netlink will use conservative (min) message size for
480         # Netlink will always allocate at least PAGE_SIZE - sizeof(skb_shinfo)
487         self.sock.setsockopt(Netlink.SOL_NETLINK, Netlink.NETLINK_CAP_ACK, 1)
488         self.sock.setsockopt(Netlink.SOL_NETLINK, Netlink.NETLINK_EXT_ACK, 1)
489         self.sock.setsockopt(Netlink.SOL_NETLINK, Netlink.NETLINK_GET_STRICT_CHK, 1)
506         self.sock.setsockopt(Netlink.SOL_NETLINK, Netlink.NETLINK_ADD_MEMBERSHIP,
554             nl_type |= Netlink.NLA_F_NESTED
595                     nl_type |= Netlink.NLA_F_NESTED
919                     print("Netlink error in ntf!?", os.strerror(-nl_msg.error))
923                     print("Netlink done while checking for ntf!?")
945         nl_flags = Netlink.NLM_F_REQUEST | Netlink.NLM_F_ACK
991                         print("Netlink warning:")
994                     if Netlink.NLM_F_DUMP in req_flags:
1029             req_flags.append(Netlink.NLM_F_DUMP)