diff options
Diffstat (limited to 'pkg/tcpip/network/ipv4/ipv4.go')
| -rw-r--r-- | pkg/tcpip/network/ipv4/ipv4.go | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/pkg/tcpip/network/ipv4/ipv4.go b/pkg/tcpip/network/ipv4/ipv4.go index 478957827..0a2378a6a 100644 --- a/pkg/tcpip/network/ipv4/ipv4.go +++ b/pkg/tcpip/network/ipv4/ipv4.go @@ -44,10 +44,6 @@ const ( // buckets is the number of identifier buckets. buckets = 2048 - - // defaultIPv4TTL is the defautl TTL for IPv4 Packets egressed by - // Netstack. - defaultIPv4TTL = 255 ) type address [header.IPv4AddressSize]byte @@ -78,6 +74,11 @@ func newEndpoint(nicid tcpip.NICID, addr tcpip.Address, dispatcher stack.Transpo return e } +// DefaultTTL is the default time-to-live value for this endpoint. +func (e *endpoint) DefaultTTL() uint8 { + return 255 +} + // MTU implements stack.NetworkEndpoint.MTU. It returns the link-layer MTU minus // the network layer max header length. func (e *endpoint) MTU() uint32 { @@ -106,7 +107,7 @@ func (e *endpoint) MaxHeaderLength() uint16 { } // WritePacket writes a packet to the given destination address and protocol. -func (e *endpoint) WritePacket(r *stack.Route, hdr *buffer.Prependable, payload buffer.VectorisedView, protocol tcpip.TransportProtocolNumber) *tcpip.Error { +func (e *endpoint) WritePacket(r *stack.Route, hdr *buffer.Prependable, payload buffer.VectorisedView, protocol tcpip.TransportProtocolNumber, ttl uint8) *tcpip.Error { ip := header.IPv4(hdr.Prepend(header.IPv4MinimumSize)) length := uint16(hdr.UsedLength() + payload.Size()) id := uint32(0) @@ -119,7 +120,7 @@ func (e *endpoint) WritePacket(r *stack.Route, hdr *buffer.Prependable, payload IHL: header.IPv4MinimumSize, TotalLength: length, ID: uint16(id), - TTL: defaultIPv4TTL, + TTL: ttl, Protocol: uint8(protocol), SrcAddr: tcpip.Address(e.address[:]), DstAddr: r.RemoteAddress, |