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// 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
}
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