netbird/gvisor
0
0
Fork 0
mirror of https://github.com/netbirdio/gvisor.git synced 2026-05-22 17:12:49 -07:00
Code Issues Packages Projects Releases Wiki Activity

Implement IP_TTL.

Browse Source 
Also change the default TTL to 64 to match Linux.

PiperOrigin-RevId: 273430341
This commit is contained in:
Ian Gudger
2019-10-07 19:29:51 -07:00
committed by gVisor bot
parent 1de0cf3563
commit 7c1587e340
26 changed files with 458 additions and 56 deletions
Download Patch File Download Diff File Expand all files Collapse all files
pkg/sentry/socket/netstack/netstack.go
+37 -3
View File
@@ -174,6 +174,10 @@ var Metrics = tcpip.Stats{
},
}
// DefaultTTL is linux's default TTL. All network protocols in all stacks used
// with this package must have this value set as their default TTL.
const DefaultTTL = 64
const sizeOfInt32 int = 4
var errStackType = syserr.New("expected but did not receive a netstack.Stack", linux.EINVAL)
@@ -833,7 +837,7 @@ func GetSockOpt(t *kernel.Task, s socket.Socket, ep commonEndpoint, family int,
return getSockOptIPv6(t, ep, name, outLen)
case linux.SOL_IP:
return getSockOptIP(t, ep, name, outLen)
return getSockOptIP(t, ep, name, outLen, family)
case linux.SOL_UDP,
linux.SOL_ICMPV6,
@@ -1176,8 +1180,25 @@ func getSockOptIPv6(t *kernel.Task, ep commonEndpoint, name, outLen int) (interf
}
// getSockOptIP implements GetSockOpt when level is SOL_IP.
func getSockOptIP(t *kernel.Task, ep commonEndpoint, name, outLen int) (interface{}, *syserr.Error) {
func getSockOptIP(t *kernel.Task, ep commonEndpoint, name, outLen int, family int) (interface{}, *syserr.Error) {
switch name {
case linux.IP_TTL:
if outLen < sizeOfInt32 {
return nil, syserr.ErrInvalidArgument
}
var v tcpip.TTLOption
if err := ep.GetSockOpt(&v); err != nil {
return nil, syserr.TranslateNetstackError(err)
}
// Fill in the default value, if needed.
if v == 0 {
v = DefaultTTL
}
return int32(v), nil
case linux.IP_MULTICAST_TTL:
if outLen < sizeOfInt32 {
return nil, syserr.ErrInvalidArgument
@@ -1648,6 +1669,20 @@ func setSockOptIP(t *kernel.Task, ep commonEndpoint, name int, optVal []byte) *s
t.Kernel().EmitUnimplementedEvent(t)
return syserr.ErrInvalidArgument
case linux.IP_TTL:
v, err := parseIntOrChar(optVal)
if err != nil {
return err
}
// -1 means default TTL.
if v == -1 {
v = 0
} else if v < 1 || v > 255 {
return syserr.ErrInvalidArgument
}
return syserr.TranslateNetstackError(ep.SetSockOpt(tcpip.TTLOption(v)))
case linux.IP_ADD_SOURCE_MEMBERSHIP,
linux.IP_BIND_ADDRESS_NO_PORT,
linux.IP_BLOCK_SOURCE,
@@ -1673,7 +1708,6 @@ func setSockOptIP(t *kernel.Task, ep commonEndpoint, name int, optVal []byte) *s
linux.IP_RETOPTS,
linux.IP_TOS,
linux.IP_TRANSPARENT,
linux.IP_TTL,
linux.IP_UNBLOCK_SOURCE,
linux.IP_UNICAST_IF,
linux.IP_XFRM_POLICY,