diff options
Diffstat (limited to 'pkg/tcpip/stack/iptables_targets.go')
| -rw-r--r-- | pkg/tcpip/stack/iptables_targets.go | 34 |
1 files changed, 10 insertions, 24 deletions
diff --git a/pkg/tcpip/stack/iptables_targets.go b/pkg/tcpip/stack/iptables_targets.go index 8581dd5e8..08063f6ff 100644 --- a/pkg/tcpip/stack/iptables_targets.go +++ b/pkg/tcpip/stack/iptables_targets.go @@ -128,26 +128,14 @@ func (ReturnTarget) Action(*PacketBuffer, *ConnTrack, Hook, *GSO, *Route, tcpip. const RedirectTargetName = "REDIRECT" // RedirectTarget redirects the packet by modifying the destination port/IP. -// Min and Max values for IP and Ports in the struct indicate the range of -// values which can be used to redirect. +// TODO(gvisor.dev/issue/170): Other flags need to be added after we support +// them. type RedirectTarget struct { - // TODO(gvisor.dev/issue/170): Other flags need to be added after - // we support them. - // RangeProtoSpecified flag indicates single port is specified to - // redirect. - RangeProtoSpecified bool + // Addr indicates address used to redirect. + Addr tcpip.Address - // MinIP indicates address used to redirect. - MinIP tcpip.Address - - // MaxIP indicates address used to redirect. - MaxIP tcpip.Address - - // MinPort indicates port used to redirect. - MinPort uint16 - - // MaxPort indicates port used to redirect. - MaxPort uint16 + // Port indicates port used to redirect. + Port uint16 // NetworkProtocol is the network protocol the target is used with. NetworkProtocol tcpip.NetworkProtocolNumber @@ -180,11 +168,9 @@ func (rt RedirectTarget) Action(pkt *PacketBuffer, ct *ConnTrack, hook Hook, gso // to primary address of the incoming interface in Prerouting. switch hook { case Output: - rt.MinIP = tcpip.Address([]byte{127, 0, 0, 1}) - rt.MaxIP = tcpip.Address([]byte{127, 0, 0, 1}) + rt.Addr = tcpip.Address([]byte{127, 0, 0, 1}) case Prerouting: - rt.MinIP = address - rt.MaxIP = address + rt.Addr = address default: panic("redirect target is supported only on output and prerouting hooks") } @@ -195,7 +181,7 @@ func (rt RedirectTarget) Action(pkt *PacketBuffer, ct *ConnTrack, hook Hook, gso switch protocol := netHeader.TransportProtocol(); protocol { case header.UDPProtocolNumber: udpHeader := header.UDP(pkt.TransportHeader().View()) - udpHeader.SetDestinationPort(rt.MinPort) + udpHeader.SetDestinationPort(rt.Port) // Calculate UDP checksum and set it. if hook == Output { @@ -213,7 +199,7 @@ func (rt RedirectTarget) Action(pkt *PacketBuffer, ct *ConnTrack, hook Hook, gso } } // Change destination address. - netHeader.SetDestinationAddress(rt.MinIP) + netHeader.SetDestinationAddress(rt.Addr) netHeader.SetChecksum(0) netHeader.SetChecksum(^netHeader.CalculateChecksum()) pkt.NatDone = true |