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authorBhasker Hariharan <bhaskerh@google.com>2019-09-03 15:59:58 -0700
committergVisor bot <gvisor-bot@google.com>2019-09-03 16:01:17 -0700
commit3789c34b22e7a7466149bfbeedf05bf49188130c (patch)
treecb6e9e7fa3c5f1eeed2786e9552107490e56e667 /pkg/tcpip/network/ipv4
parenteb94066ef26fc95d6b645124642b4f1248ad5e11 (diff)
Make UDP traceroute work.
Adds support to generate Port Unreachable messages for UDP datagrams received on a port for which there is no valid endpoint. Fixes #703 PiperOrigin-RevId: 267034418
Diffstat (limited to 'pkg/tcpip/network/ipv4')
-rw-r--r--pkg/tcpip/network/ipv4/icmp.go4
1 files changed, 1 insertions, 3 deletions
diff --git a/pkg/tcpip/network/ipv4/icmp.go b/pkg/tcpip/network/ipv4/icmp.go
index 497164cbb..a25756443 100644
--- a/pkg/tcpip/network/ipv4/icmp.go
+++ b/pkg/tcpip/network/ipv4/icmp.go
@@ -15,8 +15,6 @@
package ipv4
import (
- "encoding/binary"
-
"gvisor.dev/gvisor/pkg/tcpip/buffer"
"gvisor.dev/gvisor/pkg/tcpip/header"
"gvisor.dev/gvisor/pkg/tcpip/stack"
@@ -117,7 +115,7 @@ func (e *endpoint) handleICMP(r *stack.Route, netHeader buffer.View, vv buffer.V
e.handleControl(stack.ControlPortUnreachable, 0, vv)
case header.ICMPv4FragmentationNeeded:
- mtu := uint32(binary.BigEndian.Uint16(v[header.ICMPv4PayloadOffset+2:]))
+ mtu := uint32(h.MTU())
e.handleControl(stack.ControlPacketTooBig, calculateMTU(mtu), vv)
}