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-rw-r--r--pkg/sentry/socket/control/BUILD1
-rw-r--r--pkg/sentry/socket/control/control.go43
-rw-r--r--pkg/sentry/socket/hostinet/socket.go11
-rw-r--r--pkg/sentry/socket/netstack/netstack.go37
4 files changed, 86 insertions, 6 deletions
diff --git a/pkg/sentry/socket/control/BUILD b/pkg/sentry/socket/control/BUILD
index 79e16d6e8..4d42d29cb 100644
--- a/pkg/sentry/socket/control/BUILD
+++ b/pkg/sentry/socket/control/BUILD
@@ -19,6 +19,7 @@ go_library(
"//pkg/sentry/socket",
"//pkg/sentry/socket/unix/transport",
"//pkg/syserror",
+ "//pkg/tcpip",
"//pkg/usermem",
],
)
diff --git a/pkg/sentry/socket/control/control.go b/pkg/sentry/socket/control/control.go
index 6145a7fc3..4667373d2 100644
--- a/pkg/sentry/socket/control/control.go
+++ b/pkg/sentry/socket/control/control.go
@@ -26,6 +26,7 @@ import (
"gvisor.dev/gvisor/pkg/sentry/socket"
"gvisor.dev/gvisor/pkg/sentry/socket/unix/transport"
"gvisor.dev/gvisor/pkg/syserror"
+ "gvisor.dev/gvisor/pkg/tcpip"
"gvisor.dev/gvisor/pkg/usermem"
)
@@ -338,6 +339,22 @@ func PackTClass(t *kernel.Task, tClass int32, buf []byte) []byte {
)
}
+// PackIPPacketInfo packs an IP_PKTINFO socket control message.
+func PackIPPacketInfo(t *kernel.Task, packetInfo tcpip.IPPacketInfo, buf []byte) []byte {
+ var p linux.ControlMessageIPPacketInfo
+ p.NIC = int32(packetInfo.NIC)
+ copy(p.LocalAddr[:], []byte(packetInfo.LocalAddr))
+ copy(p.DestinationAddr[:], []byte(packetInfo.DestinationAddr))
+
+ return putCmsgStruct(
+ buf,
+ linux.SOL_IP,
+ linux.IP_PKTINFO,
+ t.Arch().Width(),
+ p,
+ )
+}
+
// PackControlMessages packs control messages into the given buffer.
//
// We skip control messages specific to Unix domain sockets.
@@ -362,6 +379,10 @@ func PackControlMessages(t *kernel.Task, cmsgs socket.ControlMessages, buf []byt
buf = PackTClass(t, cmsgs.IP.TClass, buf)
}
+ if cmsgs.IP.HasIPPacketInfo {
+ buf = PackIPPacketInfo(t, cmsgs.IP.PacketInfo, buf)
+ }
+
return buf
}
@@ -394,6 +415,16 @@ func CmsgsSpace(t *kernel.Task, cmsgs socket.ControlMessages) int {
return space
}
+// NewIPPacketInfo returns the IPPacketInfo struct.
+func NewIPPacketInfo(packetInfo linux.ControlMessageIPPacketInfo) tcpip.IPPacketInfo {
+ var p tcpip.IPPacketInfo
+ p.NIC = tcpip.NICID(packetInfo.NIC)
+ copy([]byte(p.LocalAddr), packetInfo.LocalAddr[:])
+ copy([]byte(p.DestinationAddr), packetInfo.DestinationAddr[:])
+
+ return p
+}
+
// Parse parses a raw socket control message into portable objects.
func Parse(t *kernel.Task, socketOrEndpoint interface{}, buf []byte) (socket.ControlMessages, error) {
var (
@@ -468,6 +499,18 @@ func Parse(t *kernel.Task, socketOrEndpoint interface{}, buf []byte) (socket.Con
binary.Unmarshal(buf[i:i+linux.SizeOfControlMessageTOS], usermem.ByteOrder, &cmsgs.IP.TOS)
i += binary.AlignUp(length, width)
+ case linux.IP_PKTINFO:
+ if length < linux.SizeOfControlMessageIPPacketInfo {
+ return socket.ControlMessages{}, syserror.EINVAL
+ }
+
+ cmsgs.IP.HasIPPacketInfo = true
+ var packetInfo linux.ControlMessageIPPacketInfo
+ binary.Unmarshal(buf[i:i+linux.SizeOfControlMessageIPPacketInfo], usermem.ByteOrder, &packetInfo)
+
+ cmsgs.IP.PacketInfo = NewIPPacketInfo(packetInfo)
+ 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 de76388ac..22f78d2e2 100644
--- a/pkg/sentry/socket/hostinet/socket.go
+++ b/pkg/sentry/socket/hostinet/socket.go
@@ -289,7 +289,7 @@ func (s *socketOperations) GetSockOpt(t *kernel.Task, level int, name int, outPt
switch level {
case linux.SOL_IP:
switch name {
- case linux.IP_TOS, linux.IP_RECVTOS:
+ case linux.IP_TOS, linux.IP_RECVTOS, linux.IP_PKTINFO:
optlen = sizeofInt32
}
case linux.SOL_IPV6:
@@ -336,6 +336,8 @@ func (s *socketOperations) SetSockOpt(t *kernel.Task, level int, name int, opt [
switch name {
case linux.IP_TOS, linux.IP_RECVTOS:
optlen = sizeofInt32
+ case linux.IP_PKTINFO:
+ optlen = linux.SizeOfControlMessageIPPacketInfo
}
case linux.SOL_IPV6:
switch name {
@@ -473,7 +475,14 @@ func (s *socketOperations) RecvMsg(t *kernel.Task, dst usermem.IOSequence, flags
case syscall.IP_TOS:
controlMessages.IP.HasTOS = true
binary.Unmarshal(unixCmsg.Data[:linux.SizeOfControlMessageTOS], usermem.ByteOrder, &controlMessages.IP.TOS)
+
+ case syscall.IP_PKTINFO:
+ controlMessages.IP.HasIPPacketInfo = true
+ var packetInfo linux.ControlMessageIPPacketInfo
+ binary.Unmarshal(unixCmsg.Data[:linux.SizeOfControlMessageIPPacketInfo], usermem.ByteOrder, &packetInfo)
+ controlMessages.IP.PacketInfo = control.NewIPPacketInfo(packetInfo)
}
+
case syscall.SOL_IPV6:
switch unixCmsg.Header.Type {
case syscall.IPV6_TCLASS:
diff --git a/pkg/sentry/socket/netstack/netstack.go b/pkg/sentry/socket/netstack/netstack.go
index ed2fbcceb..9757fbfba 100644
--- a/pkg/sentry/socket/netstack/netstack.go
+++ b/pkg/sentry/socket/netstack/netstack.go
@@ -1414,6 +1414,21 @@ func getSockOptIP(t *kernel.Task, ep commonEndpoint, name, outLen int, family in
}
return o, nil
+ case linux.IP_PKTINFO:
+ if outLen < sizeOfInt32 {
+ return nil, syserr.ErrInvalidArgument
+ }
+
+ v, err := ep.GetSockOptBool(tcpip.ReceiveIPPacketInfoOption)
+ if err != nil {
+ return nil, syserr.TranslateNetstackError(err)
+ }
+ var o int32
+ if v {
+ o = 1
+ }
+ return o, nil
+
default:
emitUnimplementedEventIP(t, name)
}
@@ -1762,6 +1777,7 @@ func setSockOptIPv6(t *kernel.Task, ep commonEndpoint, name int, optVal []byte)
linux.IPV6_IPSEC_POLICY,
linux.IPV6_JOIN_ANYCAST,
linux.IPV6_LEAVE_ANYCAST,
+ // TODO(b/148887420): Add support for IPV6_PKTINFO.
linux.IPV6_PKTINFO,
linux.IPV6_ROUTER_ALERT,
linux.IPV6_XFRM_POLICY,
@@ -1949,6 +1965,16 @@ func setSockOptIP(t *kernel.Task, ep commonEndpoint, name int, optVal []byte) *s
}
return syserr.TranslateNetstackError(ep.SetSockOptBool(tcpip.ReceiveTOSOption, v != 0))
+ case linux.IP_PKTINFO:
+ if len(optVal) == 0 {
+ return nil
+ }
+ v, err := parseIntOrChar(optVal)
+ if err != nil {
+ return err
+ }
+ return syserr.TranslateNetstackError(ep.SetSockOptBool(tcpip.ReceiveIPPacketInfoOption, v != 0))
+
case linux.IP_ADD_SOURCE_MEMBERSHIP,
linux.IP_BIND_ADDRESS_NO_PORT,
linux.IP_BLOCK_SOURCE,
@@ -1964,7 +1990,6 @@ func setSockOptIP(t *kernel.Task, ep commonEndpoint, name int, optVal []byte) *s
linux.IP_NODEFRAG,
linux.IP_OPTIONS,
linux.IP_PASSSEC,
- linux.IP_PKTINFO,
linux.IP_RECVERR,
linux.IP_RECVFRAGSIZE,
linux.IP_RECVOPTS,
@@ -2395,10 +2420,12 @@ func (s *SocketOperations) nonBlockingRead(ctx context.Context, dst usermem.IOSe
func (s *SocketOperations) controlMessages() socket.ControlMessages {
return socket.ControlMessages{
IP: tcpip.ControlMessages{
- HasTimestamp: s.readCM.HasTimestamp && s.sockOptTimestamp,
- Timestamp: s.readCM.Timestamp,
- HasTOS: s.readCM.HasTOS,
- TOS: s.readCM.TOS,
+ HasTimestamp: s.readCM.HasTimestamp && s.sockOptTimestamp,
+ Timestamp: s.readCM.Timestamp,
+ HasTOS: s.readCM.HasTOS,
+ TOS: s.readCM.TOS,
+ HasIPPacketInfo: s.readCM.HasIPPacketInfo,
+ PacketInfo: s.readCM.PacketInfo,
},
}
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-01 20:35:48 +0000