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Andrei VaginandgVisor bot
7b61504237
Now if a process sends an unsupported netlink requests, an error is returned from the send system call. The linux kernel works differently in this case. It returns errors in the nlmsgerr netlink message. Reported-by: [email protected] PiperOrigin-RevId: 262690453
131 lines
3.4 KiB
Go
131 lines
3.4 KiB
Go
// Copyright 2018 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package linux
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// Netlink protocols, from uapi/linux/netlink.h.
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const (
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NETLINK_ROUTE = 0
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NETLINK_UNUSED = 1
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NETLINK_USERSOCK = 2
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NETLINK_FIREWALL = 3
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NETLINK_SOCK_DIAG = 4
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NETLINK_NFLOG = 5
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NETLINK_XFRM = 6
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NETLINK_SELINUX = 7
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NETLINK_ISCSI = 8
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NETLINK_AUDIT = 9
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NETLINK_FIB_LOOKUP = 10
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NETLINK_CONNECTOR = 11
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NETLINK_NETFILTER = 12
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NETLINK_IP6_FW = 13
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NETLINK_DNRTMSG = 14
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NETLINK_KOBJECT_UEVENT = 15
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NETLINK_GENERIC = 16
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NETLINK_SCSITRANSPORT = 18
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NETLINK_ECRYPTFS = 19
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NETLINK_RDMA = 20
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NETLINK_CRYPTO = 21
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)
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// SockAddrNetlink is struct sockaddr_nl, from uapi/linux/netlink.h.
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type SockAddrNetlink struct {
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Family uint16
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_ uint16
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PortID uint32
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Groups uint32
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}
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// SockAddrNetlinkSize is the size of SockAddrNetlink.
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const SockAddrNetlinkSize = 12
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// NetlinkMessageHeader is struct nlmsghdr, from uapi/linux/netlink.h.
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type NetlinkMessageHeader struct {
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Length uint32
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Type uint16
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Flags uint16
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Seq uint32
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PortID uint32
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}
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// NetlinkMessageHeaderSize is the size of NetlinkMessageHeader.
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const NetlinkMessageHeaderSize = 16
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// Netlink message header flags, from uapi/linux/netlink.h.
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const (
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NLM_F_REQUEST = 0x1
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NLM_F_MULTI = 0x2
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NLM_F_ACK = 0x4
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NLM_F_ECHO = 0x8
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NLM_F_DUMP_INTR = 0x10
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NLM_F_ROOT = 0x100
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NLM_F_MATCH = 0x200
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NLM_F_ATOMIC = 0x400
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NLM_F_DUMP = NLM_F_ROOT | NLM_F_MATCH
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NLM_F_REPLACE = 0x100
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NLM_F_EXCL = 0x200
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NLM_F_CREATE = 0x400
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NLM_F_APPEND = 0x800
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)
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// Standard netlink message types, from uapi/linux/netlink.h.
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const (
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NLMSG_NOOP = 0x1
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NLMSG_ERROR = 0x2
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NLMSG_DONE = 0x3
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NLMSG_OVERRUN = 0x4
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// NLMSG_MIN_TYPE is the first value for protocol-level types.
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NLMSG_MIN_TYPE = 0x10
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)
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// NLMSG_ALIGNTO is the alignment of netlink messages, from
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// uapi/linux/netlink.h.
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const NLMSG_ALIGNTO = 4
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// NetlinkAttrHeader is the header of a netlink attribute, followed by payload.
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//
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// This is struct nlattr, from uapi/linux/netlink.h.
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type NetlinkAttrHeader struct {
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Length uint16
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Type uint16
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}
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// NetlinkAttrHeaderSize is the size of NetlinkAttrHeader.
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const NetlinkAttrHeaderSize = 4
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// NLA_ALIGNTO is the alignment of netlink attributes, from
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// uapi/linux/netlink.h.
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const NLA_ALIGNTO = 4
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// Socket options, from uapi/linux/netlink.h.
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const (
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NETLINK_ADD_MEMBERSHIP = 1
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NETLINK_DROP_MEMBERSHIP = 2
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NETLINK_PKTINFO = 3
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NETLINK_BROADCAST_ERROR = 4
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NETLINK_NO_ENOBUFS = 5
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NETLINK_LISTEN_ALL_NSID = 8
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NETLINK_LIST_MEMBERSHIPS = 9
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NETLINK_CAP_ACK = 10
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NETLINK_EXT_ACK = 11
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NETLINK_DUMP_STRICT_CHK = 12
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)
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// NetlinkErrorMessage is struct nlmsgerr, from uapi/linux/netlink.h.
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type NetlinkErrorMessage struct {
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Error int32
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Header NetlinkMessageHeader
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}
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