diff options
Diffstat (limited to 'vendor/github.com/miekg/dns/vendor/golang.org/x/net/icmp/mpls.go')
-rw-r--r-- | vendor/github.com/miekg/dns/vendor/golang.org/x/net/icmp/mpls.go | 77 |
1 files changed, 0 insertions, 77 deletions
diff --git a/vendor/github.com/miekg/dns/vendor/golang.org/x/net/icmp/mpls.go b/vendor/github.com/miekg/dns/vendor/golang.org/x/net/icmp/mpls.go deleted file mode 100644 index c31491748..000000000 --- a/vendor/github.com/miekg/dns/vendor/golang.org/x/net/icmp/mpls.go +++ /dev/null @@ -1,77 +0,0 @@ -// Copyright 2015 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 MPLSLabel represents a MPLS label stack entry. -type MPLSLabel struct { - Label int // label value - TC int // traffic class; formerly experimental use - S bool // bottom of stack - TTL int // time to live -} - -const ( - classMPLSLabelStack = 1 - typeIncomingMPLSLabelStack = 1 -) - -// A MPLSLabelStack represents a MPLS label stack. -type MPLSLabelStack struct { - Class int // extension object class number - Type int // extension object sub-type - Labels []MPLSLabel -} - -// Len implements the Len method of Extension interface. -func (ls *MPLSLabelStack) Len(proto int) int { - return 4 + (4 * len(ls.Labels)) -} - -// Marshal implements the Marshal method of Extension interface. -func (ls *MPLSLabelStack) Marshal(proto int) ([]byte, error) { - b := make([]byte, ls.Len(proto)) - if err := ls.marshal(proto, b); err != nil { - return nil, err - } - return b, nil -} - -func (ls *MPLSLabelStack) marshal(proto int, b []byte) error { - l := ls.Len(proto) - binary.BigEndian.PutUint16(b[:2], uint16(l)) - b[2], b[3] = classMPLSLabelStack, typeIncomingMPLSLabelStack - off := 4 - for _, ll := range ls.Labels { - b[off], b[off+1], b[off+2] = byte(ll.Label>>12), byte(ll.Label>>4&0xff), byte(ll.Label<<4&0xf0) - b[off+2] |= byte(ll.TC << 1 & 0x0e) - if ll.S { - b[off+2] |= 0x1 - } - b[off+3] = byte(ll.TTL) - off += 4 - } - return nil -} - -func parseMPLSLabelStack(b []byte) (Extension, error) { - ls := &MPLSLabelStack{ - Class: int(b[2]), - Type: int(b[3]), - } - for b = b[4:]; len(b) >= 4; b = b[4:] { - ll := MPLSLabel{ - Label: int(b[0])<<12 | int(b[1])<<4 | int(b[2])>>4, - TC: int(b[2]&0x0e) >> 1, - TTL: int(b[3]), - } - if b[2]&0x1 != 0 { - ll.S = true - } - ls.Labels = append(ls.Labels, ll) - } - return ls, nil -} |