Check in gVisor.

PiperOrigin-RevId: 194583126
Change-Id: Ica1d8821a90f74e7e745962d71801c598c652463

1 files changed, 290 insertions, 0 deletions

diff --git a/pkg/abi/linux/socket.go b/pkg/abi/linux/socket.go
new file mode 100644
index 000000000..9a78cc131
--- /dev/null
+++ b/pkg/abi/linux/socket.go
@@ -0,0 +1,290 @@
+// Copyright 2018 Google Inc.
+//
+// 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
+
+import "gvisor.googlesource.com/gvisor/pkg/binary"
+
+// Address families, from linux/socket.h.
+const (
+	AF_UNSPEC     = 0
+	AF_UNIX       = 1
+	AF_INET       = 2
+	AF_AX25       = 3
+	AF_IPX        = 4
+	AF_APPLETALK  = 5
+	AF_NETROM     = 6
+	AF_BRIDGE     = 7
+	AF_ATMPVC     = 8
+	AF_X25        = 9
+	AF_INET6      = 10
+	AF_ROSE       = 11
+	AF_DECnet     = 12
+	AF_NETBEUI    = 13
+	AF_SECURITY   = 14
+	AF_KEY        = 15
+	AF_NETLINK    = 16
+	AF_PACKET     = 17
+	AF_ASH        = 18
+	AF_ECONET     = 19
+	AF_ATMSVC     = 20
+	AF_RDS        = 21
+	AF_SNA        = 22
+	AF_IRDA       = 23
+	AF_PPPOX      = 24
+	AF_WANPIPE    = 25
+	AF_LLC        = 26
+	AF_IB         = 27
+	AF_MPLS       = 28
+	AF_CAN        = 29
+	AF_TIPC       = 30
+	AF_BLUETOOTH  = 31
+	AF_IUCV       = 32
+	AF_RXRPC      = 33
+	AF_ISDN       = 34
+	AF_PHONET     = 35
+	AF_IEEE802154 = 36
+	AF_CAIF       = 37
+	AF_ALG        = 38
+	AF_NFC        = 39
+	AF_VSOCK      = 40
+)
+
+// sendmsg(2)/recvmsg(2) flags, from linux/socket.h.
+const (
+	MSG_OOB              = 0x1
+	MSG_PEEK             = 0x2
+	MSG_DONTROUTE        = 0x4
+	MSG_TRYHARD          = 0x4
+	MSG_CTRUNC           = 0x8
+	MSG_PROBE            = 0x10
+	MSG_TRUNC            = 0x20
+	MSG_DONTWAIT         = 0x40
+	MSG_EOR              = 0x80
+	MSG_WAITALL          = 0x100
+	MSG_FIN              = 0x200
+	MSG_EOF              = MSG_FIN
+	MSG_SYN              = 0x400
+	MSG_CONFIRM          = 0x800
+	MSG_RST              = 0x1000
+	MSG_ERRQUEUE         = 0x2000
+	MSG_NOSIGNAL         = 0x4000
+	MSG_MORE             = 0x8000
+	MSG_WAITFORONE       = 0x10000
+	MSG_SENDPAGE_NOTLAST = 0x20000
+	MSG_REINJECT         = 0x8000000
+	MSG_ZEROCOPY         = 0x4000000
+	MSG_FASTOPEN         = 0x20000000
+	MSG_CMSG_CLOEXEC     = 0x40000000
+)
+
+// SOL_SOCKET is from socket.h
+const SOL_SOCKET = 1
+
+// Socket types, from linux/net.h.
+const (
+	SOCK_STREAM    = 1
+	SOCK_DGRAM     = 2
+	SOCK_RAW       = 3
+	SOCK_RDM       = 4
+	SOCK_SEQPACKET = 5
+	SOCK_DCCP      = 6
+	SOCK_PACKET    = 10
+)
+
+// SOCK_TYPE_MASK covers all of the above socket types. The remaining bits are
+// flags. From linux/net.h.
+const SOCK_TYPE_MASK = 0xf
+
+// socket(2)/socketpair(2)/accept4(2) flags, from linux/net.h.
+const (
+	SOCK_CLOEXEC  = O_CLOEXEC
+	SOCK_NONBLOCK = O_NONBLOCK
+)
+
+// shutdown(2) how commands, from <linux/net.h>.
+const (
+	SHUT_RD   = 0
+	SHUT_WR   = 1
+	SHUT_RDWR = 2
+)
+
+// Socket options from socket.h.
+const (
+	SO_ERROR       = 4
+	SO_KEEPALIVE   = 9
+	SO_LINGER      = 13
+	SO_MARK        = 36
+	SO_PASSCRED    = 16
+	SO_PEERCRED    = 17
+	SO_PEERNAME    = 28
+	SO_PROTOCOL    = 38
+	SO_RCVBUF      = 8
+	SO_RCVTIMEO    = 20
+	SO_REUSEADDR   = 2
+	SO_SNDBUF      = 7
+	SO_SNDTIMEO    = 21
+	SO_TIMESTAMP   = 29
+	SO_TIMESTAMPNS = 35
+	SO_TYPE        = 3
+)
+
+// SockAddrInt is struct sockaddr_in, from uapi/linux/in.h.
+type SockAddrInet struct {
+	Family uint16
+	Port   uint16
+	Addr   [4]byte
+	Zero   [8]uint8 // pad to sizeof(struct sockaddr).
+}
+
+// SockAddrInt6 is struct sockaddr_in6, from uapi/linux/in6.h.
+type SockAddrInet6 struct {
+	Family   uint16
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte
+	Scope_id uint32
+}
+
+// UnixPathMax is the maximum length of the path in an AF_UNIX socket.
+//
+// From uapi/linux/un.h.
+const UnixPathMax = 108
+
+// SockAddrUnix is struct sockaddr_un, from uapi/linux/un.h.
+type SockAddrUnix struct {
+	Family uint16
+	Path   [UnixPathMax]int8
+}
+
+// TCPInfo is a collection of TCP statistics.
+//
+// From uapi/linux/tcp.h.
+type TCPInfo struct {
+	State       uint8
+	CaState     uint8
+	Retransmits uint8
+	Probes      uint8
+	Backoff     uint8
+	Options     uint8
+	// WindowScale is the combination of snd_wscale (first 4 bits) and rcv_wscale (second 4 bits)
+	WindowScale uint8
+	// DeliveryRateAppLimited is a boolean and only the first bit is meaningful.
+	DeliveryRateAppLimited uint8
+
+	RTO    uint32
+	ATO    uint32
+	SndMss uint32
+	RcvMss uint32
+
+	Unacked uint32
+	Sacked  uint32
+	Lost    uint32
+	Retrans uint32
+	Fackets uint32
+
+	// Times.
+	LastDataSent uint32
+	LastAckSent  uint32
+	LastDataRecv uint32
+	LastAckRecv  uint32
+
+	// Metrics.
+	PMTU        uint32
+	RcvSsthresh uint32
+	RTT         uint32
+	RTTVar      uint32
+	SndSsthresh uint32
+	SndCwnd     uint32
+	Advmss      uint32
+	Reordering  uint32
+
+	RcvRTT   uint32
+	RcvSpace uint32
+
+	TotalRetrans uint32
+
+	PacingRate    uint64
+	MaxPacingRate uint64
+	// BytesAcked is RFC4898 tcpEStatsAppHCThruOctetsAcked.
+	BytesAcked uint64
+	// BytesReceived is RFC4898 tcpEStatsAppHCThruOctetsReceived.
+	BytesReceived uint64
+	// SegsOut is RFC4898 tcpEStatsPerfSegsOut.
+	SegsOut uint32
+	// SegsIn is RFC4898 tcpEStatsPerfSegsIn.
+	SegsIn uint32
+
+	NotSentBytes uint32
+	MinRTT       uint32
+	// DataSegsIn is RFC4898 tcpEStatsDataSegsIn.
+	DataSegsIn uint32
+	// DataSegsOut is RFC4898 tcpEStatsDataSegsOut.
+	DataSegsOut uint32
+
+	DeliveryRate uint64
+
+	// BusyTime is the time in microseconds busy sending data.
+	BusyTime uint64
+	// RwndLimited is the time in microseconds limited by receive window.
+	RwndLimited uint64
+	// SndBufLimited is the time in microseconds limited by send buffer.
+	SndBufLimited uint64
+}
+
+// SizeOfTCPInfo is the binary size of a TCPInfo struct (104 bytes).
+var SizeOfTCPInfo = binary.Size(TCPInfo{})
+
+// Control message types, from linux/socket.h.
+const (
+	SCM_CREDENTIALS = 0x2
+	SCM_RIGHTS      = 0x1
+)
+
+// A ControlMessageHeader is the header for a socket control message.
+//
+// ControlMessageHeader represents struct cmsghdr from linux/socket.h.
+type ControlMessageHeader struct {
+	Length uint64
+	Level  int32
+	Type   int32
+}
+
+// SizeOfControlMessageHeader is the binary size of a ControlMessageHeader
+// struct.
+var SizeOfControlMessageHeader = int(binary.Size(ControlMessageHeader{}))
+
+// A ControlMessageCredentials is an SCM_CREDENTIALS socket control message.
+//
+// ControlMessageCredentials represents struct ucred from linux/socket.h.
+type ControlMessageCredentials struct {
+	PID int32
+	UID uint32
+	GID uint32
+}
+
+// SizeOfControlMessageCredentials is the binary size of a
+// ControlMessageCredentials struct.
+var SizeOfControlMessageCredentials = int(binary.Size(ControlMessageCredentials{}))
+
+// A ControlMessageRights is an SCM_RIGHTS socket control message.
+type ControlMessageRights []int32
+
+// SizeOfControlMessageRight is the size of a single element in
+// ControlMessageRights.
+const SizeOfControlMessageRight = 4
+
+// SCM_MAX_FD is the maximum number of FDs accepted in a single sendmsg call.
+// From net/scm.h.
+const SCM_MAX_FD = 253