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-rw-r--r--pkg/abi/linux/BUILD1
-rw-r--r--pkg/abi/linux/errqueue.go93
-rw-r--r--pkg/sentry/socket/control/control.go39
-rw-r--r--pkg/sentry/socket/hostinet/socket.go19
-rw-r--r--pkg/sentry/socket/netstack/netstack.go43
-rw-r--r--pkg/sentry/socket/socket.go55
-rw-r--r--pkg/sentry/syscalls/linux/sys_socket.go5
-rw-r--r--pkg/sentry/syscalls/linux/vfs2/socket.go5
-rw-r--r--pkg/tcpip/BUILD14
-rw-r--r--pkg/tcpip/socketops.go63
-rw-r--r--pkg/tcpip/tcpip.go3
11 files changed, 323 insertions, 17 deletions
diff --git a/pkg/abi/linux/BUILD b/pkg/abi/linux/BUILD
index a0654df2f..8fa61d6f7 100644
--- a/pkg/abi/linux/BUILD
+++ b/pkg/abi/linux/BUILD
@@ -21,6 +21,7 @@ go_library(
"epoll_amd64.go",
"epoll_arm64.go",
"errors.go",
+ "errqueue.go",
"eventfd.go",
"exec.go",
"fadvise.go",
diff --git a/pkg/abi/linux/errqueue.go b/pkg/abi/linux/errqueue.go
new file mode 100644
index 000000000..3905d4222
--- /dev/null
+++ b/pkg/abi/linux/errqueue.go
@@ -0,0 +1,93 @@
+// Copyright 2020 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
+
+import (
+ "gvisor.dev/gvisor/pkg/marshal"
+)
+
+// Socket error origin codes as defined in include/uapi/linux/errqueue.h.
+const (
+ SO_EE_ORIGIN_NONE = 0
+ SO_EE_ORIGIN_LOCAL = 1
+ SO_EE_ORIGIN_ICMP = 2
+ SO_EE_ORIGIN_ICMP6 = 3
+)
+
+// SockExtendedErr represents struct sock_extended_err in Linux defined in
+// include/uapi/linux/errqueue.h.
+//
+// +marshal
+type SockExtendedErr struct {
+ Errno uint32
+ Origin uint8
+ Type uint8
+ Code uint8
+ Pad uint8
+ Info uint32
+ Data uint32
+}
+
+// SockErrCMsg represents the IP*_RECVERR control message.
+type SockErrCMsg interface {
+ marshal.Marshallable
+
+ CMsgLevel() uint32
+ CMsgType() uint32
+}
+
+// SockErrCMsgIPv4 is the IP_RECVERR control message used in
+// recvmsg(MSG_ERRQUEUE) by ipv4 sockets. This is equilavent to `struct errhdr`
+// defined in net/ipv4/ip_sockglue.c:ip_recv_error().
+//
+// +marshal
+type SockErrCMsgIPv4 struct {
+ SockExtendedErr
+ Offender SockAddrInet
+}
+
+var _ SockErrCMsg = (*SockErrCMsgIPv4)(nil)
+
+// CMsgLevel implements SockErrCMsg.CMsgLevel.
+func (*SockErrCMsgIPv4) CMsgLevel() uint32 {
+ return SOL_IP
+}
+
+// CMsgType implements SockErrCMsg.CMsgType.
+func (*SockErrCMsgIPv4) CMsgType() uint32 {
+ return IP_RECVERR
+}
+
+// SockErrCMsgIPv6 is the IPV6_RECVERR control message used in
+// recvmsg(MSG_ERRQUEUE) by ipv6 sockets. This is equilavent to `struct errhdr`
+// defined in net/ipv6/datagram.c:ipv6_recv_error().
+//
+// +marshal
+type SockErrCMsgIPv6 struct {
+ SockExtendedErr
+ Offender SockAddrInet6
+}
+
+var _ SockErrCMsg = (*SockErrCMsgIPv6)(nil)
+
+// CMsgLevel implements SockErrCMsg.CMsgLevel.
+func (*SockErrCMsgIPv6) CMsgLevel() uint32 {
+ return SOL_IPV6
+}
+
+// CMsgType implements SockErrCMsg.CMsgType.
+func (*SockErrCMsgIPv6) CMsgType() uint32 {
+ return IPV6_RECVERR
+}
diff --git a/pkg/sentry/socket/control/control.go b/pkg/sentry/socket/control/control.go
index b88cdca48..ff6b71802 100644
--- a/pkg/sentry/socket/control/control.go
+++ b/pkg/sentry/socket/control/control.go
@@ -371,6 +371,17 @@ func PackOriginalDstAddress(t *kernel.Task, originalDstAddress linux.SockAddr, b
buf, level, optType, t.Arch().Width(), originalDstAddress)
}
+// PackSockExtendedErr packs an IP*_RECVERR socket control message.
+func PackSockExtendedErr(t *kernel.Task, sockErr linux.SockErrCMsg, buf []byte) []byte {
+ return putCmsgStruct(
+ buf,
+ sockErr.CMsgLevel(),
+ sockErr.CMsgType(),
+ t.Arch().Width(),
+ sockErr,
+ )
+}
+
// PackControlMessages packs control messages into the given buffer.
//
// We skip control messages specific to Unix domain sockets.
@@ -403,6 +414,10 @@ func PackControlMessages(t *kernel.Task, cmsgs socket.ControlMessages, buf []byt
buf = PackOriginalDstAddress(t, cmsgs.IP.OriginalDstAddress, buf)
}
+ if cmsgs.IP.SockErr != nil {
+ buf = PackSockExtendedErr(t, cmsgs.IP.SockErr, buf)
+ }
+
return buf
}
@@ -440,6 +455,10 @@ func CmsgsSpace(t *kernel.Task, cmsgs socket.ControlMessages) int {
space += cmsgSpace(t, cmsgs.IP.OriginalDstAddress.SizeBytes())
}
+ if cmsgs.IP.SockErr != nil {
+ space += cmsgSpace(t, cmsgs.IP.SockErr.SizeBytes())
+ }
+
return space
}
@@ -546,6 +565,16 @@ func Parse(t *kernel.Task, socketOrEndpoint interface{}, buf []byte) (socket.Con
cmsgs.IP.OriginalDstAddress = &addr
i += binary.AlignUp(length, width)
+ case linux.IP_RECVERR:
+ var errCmsg linux.SockErrCMsgIPv4
+ if length < errCmsg.SizeBytes() {
+ return socket.ControlMessages{}, syserror.EINVAL
+ }
+
+ errCmsg.UnmarshalBytes(buf[i : i+errCmsg.SizeBytes()])
+ cmsgs.IP.SockErr = &errCmsg
+ i += binary.AlignUp(length, width)
+
default:
return socket.ControlMessages{}, syserror.EINVAL
}
@@ -568,6 +597,16 @@ func Parse(t *kernel.Task, socketOrEndpoint interface{}, buf []byte) (socket.Con
cmsgs.IP.OriginalDstAddress = &addr
i += binary.AlignUp(length, width)
+ case linux.IPV6_RECVERR:
+ var errCmsg linux.SockErrCMsgIPv6
+ if length < errCmsg.SizeBytes() {
+ return socket.ControlMessages{}, syserror.EINVAL
+ }
+
+ errCmsg.UnmarshalBytes(buf[i : i+errCmsg.SizeBytes()])
+ cmsgs.IP.SockErr = &errCmsg
+ i += binary.AlignUp(length, width)
+
default:
return socket.ControlMessages{}, syserror.EINVAL
}
diff --git a/pkg/sentry/socket/hostinet/socket.go b/pkg/sentry/socket/hostinet/socket.go
index 1f220c343..2b34ef190 100644
--- a/pkg/sentry/socket/hostinet/socket.go
+++ b/pkg/sentry/socket/hostinet/socket.go
@@ -450,11 +450,7 @@ func (s *socketOpsCommon) recvMsgFromHost(iovs []syscall.Iovec, flags int, sende
// RecvMsg implements socket.Socket.RecvMsg.
func (s *socketOpsCommon) RecvMsg(t *kernel.Task, dst usermem.IOSequence, flags int, haveDeadline bool, deadline ktime.Time, senderRequested bool, controlLen uint64) (int, int, linux.SockAddr, uint32, socket.ControlMessages, *syserr.Error) {
// Only allow known and safe flags.
- //
- // FIXME(jamieliu): We can't support MSG_ERRQUEUE because it uses ancillary
- // messages that gvisor/pkg/tcpip/transport/unix doesn't understand. Kill the
- // Socket interface's dependence on netstack.
- if flags&^(syscall.MSG_DONTWAIT|syscall.MSG_PEEK|syscall.MSG_TRUNC) != 0 {
+ if flags&^(syscall.MSG_DONTWAIT|syscall.MSG_PEEK|syscall.MSG_TRUNC|syscall.MSG_ERRQUEUE) != 0 {
return 0, 0, nil, 0, socket.ControlMessages{}, syserr.ErrInvalidArgument
}
@@ -488,7 +484,8 @@ func (s *socketOpsCommon) RecvMsg(t *kernel.Task, dst usermem.IOSequence, flags
var ch chan struct{}
n, err := copyToDst()
- if flags&syscall.MSG_DONTWAIT == 0 {
+ // recv*(MSG_ERRQUEUE) never blocks, even without MSG_DONTWAIT.
+ if flags&(syscall.MSG_DONTWAIT|syscall.MSG_ERRQUEUE) == 0 {
for err == syserror.ErrWouldBlock {
// We only expect blocking to come from the actual syscall, in which
// case it can't have returned any data.
@@ -551,6 +548,11 @@ func parseUnixControlMessages(unixControlMessages []unix.SocketControlMessage) s
var addr linux.SockAddrInet
binary.Unmarshal(unixCmsg.Data[:addr.SizeBytes()], usermem.ByteOrder, &addr)
controlMessages.IP.OriginalDstAddress = &addr
+
+ case syscall.IP_RECVERR:
+ var errCmsg linux.SockErrCMsgIPv4
+ errCmsg.UnmarshalBytes(unixCmsg.Data)
+ controlMessages.IP.SockErr = &errCmsg
}
case linux.SOL_IPV6:
@@ -563,6 +565,11 @@ func parseUnixControlMessages(unixControlMessages []unix.SocketControlMessage) s
var addr linux.SockAddrInet6
binary.Unmarshal(unixCmsg.Data[:addr.SizeBytes()], usermem.ByteOrder, &addr)
controlMessages.IP.OriginalDstAddress = &addr
+
+ case syscall.IPV6_RECVERR:
+ var errCmsg linux.SockErrCMsgIPv6
+ errCmsg.UnmarshalBytes(unixCmsg.Data)
+ controlMessages.IP.SockErr = &errCmsg
}
case linux.SOL_TCP:
diff --git a/pkg/sentry/socket/netstack/netstack.go b/pkg/sentry/socket/netstack/netstack.go
index 23d5cab9c..a8ab6b385 100644
--- a/pkg/sentry/socket/netstack/netstack.go
+++ b/pkg/sentry/socket/netstack/netstack.go
@@ -2772,6 +2772,8 @@ func (s *socketOpsCommon) controlMessages() socket.ControlMessages {
IP: socket.IPControlMessages{
HasTimestamp: s.readCM.HasTimestamp && s.sockOptTimestamp,
Timestamp: s.readCM.Timestamp,
+ HasInq: s.readCM.HasInq,
+ Inq: s.readCM.Inq,
HasTOS: s.readCM.HasTOS,
TOS: s.readCM.TOS,
HasTClass: s.readCM.HasTClass,
@@ -2779,6 +2781,7 @@ func (s *socketOpsCommon) controlMessages() socket.ControlMessages {
HasIPPacketInfo: s.readCM.HasIPPacketInfo,
PacketInfo: s.readCM.PacketInfo,
OriginalDstAddress: s.readCM.OriginalDstAddress,
+ SockErr: s.readCM.SockErr,
},
}
}
@@ -2795,9 +2798,49 @@ func (s *socketOpsCommon) updateTimestamp() {
}
}
+// addrFamilyFromNetProto returns the address family identifier for the given
+// network protocol.
+func addrFamilyFromNetProto(net tcpip.NetworkProtocolNumber) int {
+ switch net {
+ case header.IPv4ProtocolNumber:
+ return linux.AF_INET
+ case header.IPv6ProtocolNumber:
+ return linux.AF_INET6
+ default:
+ panic(fmt.Sprintf("invalid net proto for addr family inference: %d", net))
+ }
+}
+
+// recvErr handles MSG_ERRQUEUE for recvmsg(2).
+// This is analogous to net/ipv4/ip_sockglue.c:ip_recv_error().
+func (s *socketOpsCommon) recvErr(t *kernel.Task, dst usermem.IOSequence) (int, int, linux.SockAddr, uint32, socket.ControlMessages, *syserr.Error) {
+ sockErr := s.Endpoint.SocketOptions().DequeueErr()
+ if sockErr == nil {
+ return 0, 0, nil, 0, socket.ControlMessages{}, syserr.ErrTryAgain
+ }
+
+ // The payload of the original packet that caused the error is passed as
+ // normal data via msg_iovec. -- recvmsg(2)
+ msgFlags := linux.MSG_ERRQUEUE
+ if int(dst.NumBytes()) < len(sockErr.Payload) {
+ msgFlags |= linux.MSG_TRUNC
+ }
+ n, err := dst.CopyOut(t, sockErr.Payload)
+
+ // The original destination address of the datagram that caused the error is
+ // supplied via msg_name. -- recvmsg(2)
+ dstAddr, dstAddrLen := socket.ConvertAddress(addrFamilyFromNetProto(sockErr.NetProto), sockErr.Dst)
+ cmgs := socket.ControlMessages{IP: socket.NewIPControlMessages(s.family, tcpip.ControlMessages{SockErr: sockErr})}
+ return n, msgFlags, dstAddr, dstAddrLen, cmgs, syserr.FromError(err)
+}
+
// RecvMsg implements the linux syscall recvmsg(2) for sockets backed by
// tcpip.Endpoint.
func (s *socketOpsCommon) RecvMsg(t *kernel.Task, dst usermem.IOSequence, flags int, haveDeadline bool, deadline ktime.Time, senderRequested bool, controlDataLen uint64) (n int, msgFlags int, senderAddr linux.SockAddr, senderAddrLen uint32, controlMessages socket.ControlMessages, err *syserr.Error) {
+ if flags&linux.MSG_ERRQUEUE != 0 {
+ return s.recvErr(t, dst)
+ }
+
trunc := flags&linux.MSG_TRUNC != 0
peek := flags&linux.MSG_PEEK != 0
dontWait := flags&linux.MSG_DONTWAIT != 0
diff --git a/pkg/sentry/socket/socket.go b/pkg/sentry/socket/socket.go
index bcc426e33..97729dacc 100644
--- a/pkg/sentry/socket/socket.go
+++ b/pkg/sentry/socket/socket.go
@@ -56,6 +56,57 @@ func packetInfoToLinux(packetInfo tcpip.IPPacketInfo) linux.ControlMessageIPPack
return p
}
+// errOriginToLinux maps tcpip socket origin to Linux socket origin constants.
+func errOriginToLinux(origin tcpip.SockErrOrigin) uint8 {
+ switch origin {
+ case tcpip.SockExtErrorOriginNone:
+ return linux.SO_EE_ORIGIN_NONE
+ case tcpip.SockExtErrorOriginLocal:
+ return linux.SO_EE_ORIGIN_LOCAL
+ case tcpip.SockExtErrorOriginICMP:
+ return linux.SO_EE_ORIGIN_ICMP
+ case tcpip.SockExtErrorOriginICMP6:
+ return linux.SO_EE_ORIGIN_ICMP6
+ default:
+ panic(fmt.Sprintf("unknown socket origin: %d", origin))
+ }
+}
+
+// sockErrCmsgToLinux converts SockError control message from tcpip format to
+// Linux format.
+func sockErrCmsgToLinux(sockErr *tcpip.SockError) linux.SockErrCMsg {
+ if sockErr == nil {
+ return nil
+ }
+
+ ee := linux.SockExtendedErr{
+ Errno: uint32(syserr.TranslateNetstackError(sockErr.Err).ToLinux().Number()),
+ Origin: errOriginToLinux(sockErr.ErrOrigin),
+ Type: sockErr.ErrType,
+ Code: sockErr.ErrCode,
+ Info: sockErr.ErrInfo,
+ }
+
+ switch sockErr.NetProto {
+ case header.IPv4ProtocolNumber:
+ errMsg := &linux.SockErrCMsgIPv4{SockExtendedErr: ee}
+ if len(sockErr.Offender.Addr) > 0 {
+ addr, _ := ConvertAddress(linux.AF_INET, sockErr.Offender)
+ errMsg.Offender = *addr.(*linux.SockAddrInet)
+ }
+ return errMsg
+ case header.IPv6ProtocolNumber:
+ errMsg := &linux.SockErrCMsgIPv6{SockExtendedErr: ee}
+ if len(sockErr.Offender.Addr) > 0 {
+ addr, _ := ConvertAddress(linux.AF_INET6, sockErr.Offender)
+ errMsg.Offender = *addr.(*linux.SockAddrInet6)
+ }
+ return errMsg
+ default:
+ panic(fmt.Sprintf("invalid net proto for creating SockErrCMsg: %d", sockErr.NetProto))
+ }
+}
+
// NewIPControlMessages converts the tcpip ControlMessgaes (which does not
// have Linux specific format) to Linux format.
func NewIPControlMessages(family int, cmgs tcpip.ControlMessages) IPControlMessages {
@@ -75,6 +126,7 @@ func NewIPControlMessages(family int, cmgs tcpip.ControlMessages) IPControlMessa
HasIPPacketInfo: cmgs.HasIPPacketInfo,
PacketInfo: packetInfoToLinux(cmgs.PacketInfo),
OriginalDstAddress: orgDstAddr,
+ SockErr: sockErrCmsgToLinux(cmgs.SockErr),
}
}
@@ -117,6 +169,9 @@ type IPControlMessages struct {
// OriginalDestinationAddress holds the original destination address
// and port of the incoming packet.
OriginalDstAddress linux.SockAddr
+
+ // SockErr is the dequeued socket error on recvmsg(MSG_ERRQUEUE).
+ SockErr linux.SockErrCMsg
}
// Release releases Unix domain socket credentials and rights.
diff --git a/pkg/sentry/syscalls/linux/sys_socket.go b/pkg/sentry/syscalls/linux/sys_socket.go
index 9cd052c3d..4adfa6637 100644
--- a/pkg/sentry/syscalls/linux/sys_socket.go
+++ b/pkg/sentry/syscalls/linux/sys_socket.go
@@ -749,11 +749,6 @@ func recvSingleMsg(t *kernel.Task, s socket.Socket, msgPtr usermem.Addr, flags i
return 0, err
}
- // FIXME(b/63594852): Pretend we have an empty error queue.
- if flags&linux.MSG_ERRQUEUE != 0 {
- return 0, syserror.EAGAIN
- }
-
// Fast path when no control message nor name buffers are provided.
if msg.ControlLen == 0 && msg.NameLen == 0 {
n, mflags, _, _, cms, err := s.RecvMsg(t, dst, int(flags), haveDeadline, deadline, false, 0)
diff --git a/pkg/sentry/syscalls/linux/vfs2/socket.go b/pkg/sentry/syscalls/linux/vfs2/socket.go
index 7b33b3f59..987012acc 100644
--- a/pkg/sentry/syscalls/linux/vfs2/socket.go
+++ b/pkg/sentry/syscalls/linux/vfs2/socket.go
@@ -752,11 +752,6 @@ func recvSingleMsg(t *kernel.Task, s socket.SocketVFS2, msgPtr usermem.Addr, fla
return 0, err
}
- // FIXME(b/63594852): Pretend we have an empty error queue.
- if flags&linux.MSG_ERRQUEUE != 0 {
- return 0, syserror.EAGAIN
- }
-
// Fast path when no control message nor name buffers are provided.
if msg.ControlLen == 0 && msg.NameLen == 0 {
n, mflags, _, _, cms, err := s.RecvMsg(t, dst, int(flags), haveDeadline, deadline, false, 0)
diff --git a/pkg/tcpip/BUILD b/pkg/tcpip/BUILD
index 27f96a3ac..89b765f1b 100644
--- a/pkg/tcpip/BUILD
+++ b/pkg/tcpip/BUILD
@@ -1,10 +1,24 @@
load("//tools:defs.bzl", "go_library", "go_test")
+load("//tools/go_generics:defs.bzl", "go_template_instance")
package(licenses = ["notice"])
+go_template_instance(
+ name = "sock_err_list",
+ out = "sock_err_list.go",
+ package = "tcpip",
+ prefix = "sockError",
+ template = "//pkg/ilist:generic_list",
+ types = {
+ "Element": "*SockError",
+ "Linker": "*SockError",
+ },
+)
+
go_library(
name = "tcpip",
srcs = [
+ "sock_err_list.go",
"socketops.go",
"tcpip.go",
"time_unsafe.go",
diff --git a/pkg/tcpip/socketops.go b/pkg/tcpip/socketops.go
index b60a5fd76..eb63d735f 100644
--- a/pkg/tcpip/socketops.go
+++ b/pkg/tcpip/socketops.go
@@ -104,7 +104,7 @@ type SocketOptions struct {
keepAliveEnabled uint32
// multicastLoopEnabled determines whether multicast packets sent over a
- // non-loopback interface will be looped back. Analogous to inet->mc_loop.
+ // non-loopback interface will be looped back.
multicastLoopEnabled uint32
// receiveTOSEnabled is used to specify if the TOS ancillary message is
@@ -145,6 +145,10 @@ type SocketOptions struct {
// the incoming packet should be returned as an ancillary message.
receiveOriginalDstAddress uint32
+ // errQueue is the per-socket error queue. It is protected by errQueueMu.
+ errQueueMu sync.Mutex `state:"nosave"`
+ errQueue sockErrorList
+
// mu protects the access to the below fields.
mu sync.Mutex `state:"nosave"`
@@ -362,3 +366,60 @@ func (so *SocketOptions) SetLinger(linger LingerOption) {
so.linger = linger
so.mu.Unlock()
}
+
+// SockErrOrigin represents the constants for error origin.
+type SockErrOrigin uint8
+
+const (
+ // SockExtErrorOriginNone represents an unknown error origin.
+ SockExtErrorOriginNone SockErrOrigin = iota
+
+ // SockExtErrorOriginLocal indicates a local error.
+ SockExtErrorOriginLocal
+
+ // SockExtErrorOriginICMP indicates an IPv4 ICMP error.
+ SockExtErrorOriginICMP
+
+ // SockExtErrorOriginICMP6 indicates an IPv6 ICMP error.
+ SockExtErrorOriginICMP6
+)
+
+// SockError represents a queue entry in the per-socket error queue.
+//
+// +stateify savable
+type SockError struct {
+ sockErrorEntry
+
+ // Err is the error caused by the errant packet.
+ Err *Error
+ // ErrOrigin indicates the error origin.
+ ErrOrigin SockErrOrigin
+ // ErrType is the type in the ICMP header.
+ ErrType uint8
+ // ErrCode is the code in the ICMP header.
+ ErrCode uint8
+ // ErrInfo is additional info about the error.
+ ErrInfo uint32
+
+ // Payload is the errant packet's payload.
+ Payload []byte
+ // Dst is the original destination address of the errant packet.
+ Dst FullAddress
+ // Offender is the original sender address of the errant packet.
+ Offender FullAddress
+ // NetProto is the network protocol being used to transmit the packet.
+ NetProto NetworkProtocolNumber
+}
+
+// DequeueErr dequeues a socket extended error from the error queue and returns
+// it. Returns nil if queue is empty.
+func (so *SocketOptions) DequeueErr() *SockError {
+ so.errQueueMu.Lock()
+ defer so.errQueueMu.Unlock()
+
+ err := so.errQueue.Front()
+ if err != nil {
+ so.errQueue.Remove(err)
+ }
+ return err
+}
diff --git a/pkg/tcpip/tcpip.go b/pkg/tcpip/tcpip.go
index 45fa62720..a488cc108 100644
--- a/pkg/tcpip/tcpip.go
+++ b/pkg/tcpip/tcpip.go
@@ -500,6 +500,9 @@ type ControlMessages struct {
// OriginalDestinationAddress holds the original destination address
// and port of the incoming packet.
OriginalDstAddress FullAddress
+
+ // SockErr is the dequeued socket error on recvmsg(MSG_ERRQUEUE).
+ SockErr *SockError
}
// PacketOwner is used to get UID and GID of the packet.
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-18 18:25:11 +0000