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Diffstat (limited to 'pkg/abi/linux/netlink.go')
-rw-r--r-- | pkg/abi/linux/netlink.go | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/pkg/abi/linux/netlink.go b/pkg/abi/linux/netlink.go new file mode 100644 index 000000000..5e718c363 --- /dev/null +++ b/pkg/abi/linux/netlink.go @@ -0,0 +1,124 @@ +// Copyright 2018 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package linux + +// Netlink protocols, from uapi/linux/netlink.h. +const ( + NETLINK_ROUTE = 0 + NETLINK_UNUSED = 1 + NETLINK_USERSOCK = 2 + NETLINK_FIREWALL = 3 + NETLINK_SOCK_DIAG = 4 + NETLINK_NFLOG = 5 + NETLINK_XFRM = 6 + NETLINK_SELINUX = 7 + NETLINK_ISCSI = 8 + NETLINK_AUDIT = 9 + NETLINK_FIB_LOOKUP = 10 + NETLINK_CONNECTOR = 11 + NETLINK_NETFILTER = 12 + NETLINK_IP6_FW = 13 + NETLINK_DNRTMSG = 14 + NETLINK_KOBJECT_UEVENT = 15 + NETLINK_GENERIC = 16 + NETLINK_SCSITRANSPORT = 18 + NETLINK_ECRYPTFS = 19 + NETLINK_RDMA = 20 + NETLINK_CRYPTO = 21 +) + +// SockAddrNetlink is struct sockaddr_nl, from uapi/linux/netlink.h. +type SockAddrNetlink struct { + Family uint16 + Padding uint16 + PortID uint32 + Groups uint32 +} + +// SockAddrNetlinkSize is the size of SockAddrNetlink. +const SockAddrNetlinkSize = 12 + +// NetlinkMessageHeader is struct nlmsghdr, from uapi/linux/netlink.h. +type NetlinkMessageHeader struct { + Length uint32 + Type uint16 + Flags uint16 + Seq uint32 + PortID uint32 +} + +// NetlinkMessageHeaderSize is the size of NetlinkMessageHeader. +const NetlinkMessageHeaderSize = 16 + +// Netlink message header flags, from uapi/linux/netlink.h. +const ( + NLM_F_REQUEST = 0x1 + NLM_F_MULTI = 0x2 + NLM_F_ACK = 0x4 + NLM_F_ECHO = 0x8 + NLM_F_DUMP_INTR = 0x10 + NLM_F_ROOT = 0x100 + NLM_F_MATCH = 0x200 + NLM_F_ATOMIC = 0x400 + NLM_F_DUMP = NLM_F_ROOT | NLM_F_MATCH + NLM_F_REPLACE = 0x100 + NLM_F_EXCL = 0x200 + NLM_F_CREATE = 0x400 + NLM_F_APPEND = 0x800 +) + +// Standard netlink message types, from uapi/linux/netlink.h. +const ( + NLMSG_NOOP = 0x1 + NLMSG_ERROR = 0x2 + NLMSG_DONE = 0x3 + NLMSG_OVERRUN = 0x4 + + // NLMSG_MIN_TYPE is the first value for protocol-level types. + NLMSG_MIN_TYPE = 0x10 +) + +// NLMSG_ALIGNTO is the alignment of netlink messages, from +// uapi/linux/netlink.h. +const NLMSG_ALIGNTO = 4 + +// NetlinkAttrHeader is the header of a netlink attribute, followed by payload. +// +// This is struct nlattr, from uapi/linux/netlink.h. +type NetlinkAttrHeader struct { + Length uint16 + Type uint16 +} + +// NetlinkAttrHeaderSize is the size of NetlinkAttrHeader. +const NetlinkAttrHeaderSize = 4 + +// NLA_ALIGNTO is the alignment of netlink attributes, from +// uapi/linux/netlink.h. +const NLA_ALIGNTO = 4 + +// Socket options, from uapi/linux/netlink.h. +const ( + NETLINK_ADD_MEMBERSHIP = 1 + NETLINK_DROP_MEMBERSHIP = 2 + NETLINK_PKTINFO = 3 + NETLINK_BROADCAST_ERROR = 4 + NETLINK_NO_ENOBUFS = 5 + NETLINK_LISTEN_ALL_NSID = 8 + NETLINK_LIST_MEMBERSHIPS = 9 + NETLINK_CAP_ACK = 10 + NETLINK_EXT_ACK = 11 + NETLINK_DUMP_STRICT_CHK = 12 +) |