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authorDimitri Sokolyuk <demon@dim13.org>2018-07-24 14:35:44 +0200
committerDimitri Sokolyuk <demon@dim13.org>2018-07-24 14:35:44 +0200
commit621e49bb465f500cc46d47e39e828cf76d6381d7 (patch)
treee9d6ed54cfae73209f2b0d9a016ef0b64adf45a6 /vendor/golang.org/x/net/icmp/packettoobig.go
parent5b9a4a158b81aa6e94a5a56d0851bea938b87bef (diff)
update vendor
Diffstat (limited to 'vendor/golang.org/x/net/icmp/packettoobig.go')
-rw-r--r--vendor/golang.org/x/net/icmp/packettoobig.go43
1 files changed, 43 insertions, 0 deletions
diff --git a/vendor/golang.org/x/net/icmp/packettoobig.go b/vendor/golang.org/x/net/icmp/packettoobig.go
new file mode 100644
index 0000000..afbf24f
--- /dev/null
+++ b/vendor/golang.org/x/net/icmp/packettoobig.go
@@ -0,0 +1,43 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package icmp
+
+import "encoding/binary"
+
+// A PacketTooBig represents an ICMP packet too big message body.
+type PacketTooBig struct {
+ MTU int // maximum transmission unit of the nexthop link
+ Data []byte // data, known as original datagram field
+}
+
+// Len implements the Len method of MessageBody interface.
+func (p *PacketTooBig) Len(proto int) int {
+ if p == nil {
+ return 0
+ }
+ return 4 + len(p.Data)
+}
+
+// Marshal implements the Marshal method of MessageBody interface.
+func (p *PacketTooBig) Marshal(proto int) ([]byte, error) {
+ b := make([]byte, 4+len(p.Data))
+ binary.BigEndian.PutUint32(b[:4], uint32(p.MTU))
+ copy(b[4:], p.Data)
+ return b, nil
+}
+
+// parsePacketTooBig parses b as an ICMP packet too big message body.
+func parsePacketTooBig(proto int, _ Type, b []byte) (MessageBody, error) {
+ bodyLen := len(b)
+ if bodyLen < 4 {
+ return nil, errMessageTooShort
+ }
+ p := &PacketTooBig{MTU: int(binary.BigEndian.Uint32(b[:4]))}
+ if bodyLen > 4 {
+ p.Data = make([]byte, bodyLen-4)
+ copy(p.Data, b[4:])
+ }
+ return p, nil
+}