VOL-381 add unum container to support ONOS cluster formation under swarm
Change-Id: Ic260edda19bb199ed040f05164ab605f28c919d0
diff --git a/unum/vendor/golang.org/x/net/icmp/extension.go b/unum/vendor/golang.org/x/net/icmp/extension.go
new file mode 100644
index 0000000..402a751
--- /dev/null
+++ b/unum/vendor/golang.org/x/net/icmp/extension.go
@@ -0,0 +1,89 @@
+// 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"
+
+// An Extension represents an ICMP extension.
+type Extension interface {
+ // Len returns the length of ICMP extension.
+ // Proto must be either the ICMPv4 or ICMPv6 protocol number.
+ Len(proto int) int
+
+ // Marshal returns the binary encoding of ICMP extension.
+ // Proto must be either the ICMPv4 or ICMPv6 protocol number.
+ Marshal(proto int) ([]byte, error)
+}
+
+const extensionVersion = 2
+
+func validExtensionHeader(b []byte) bool {
+ v := int(b[0]&0xf0) >> 4
+ s := binary.BigEndian.Uint16(b[2:4])
+ if s != 0 {
+ s = checksum(b)
+ }
+ if v != extensionVersion || s != 0 {
+ return false
+ }
+ return true
+}
+
+// parseExtensions parses b as a list of ICMP extensions.
+// The length attribute l must be the length attribute field in
+// received icmp messages.
+//
+// It will return a list of ICMP extensions and an adjusted length
+// attribute that represents the length of the padded original
+// datagram field. Otherwise, it returns an error.
+func parseExtensions(b []byte, l int) ([]Extension, int, error) {
+ // Still a lot of non-RFC 4884 compliant implementations are
+ // out there. Set the length attribute l to 128 when it looks
+ // inappropriate for backwards compatibility.
+ //
+ // A minimal extension at least requires 8 octets; 4 octets
+ // for an extension header, and 4 octets for a single object
+ // header.
+ //
+ // See RFC 4884 for further information.
+ if 128 > l || l+8 > len(b) {
+ l = 128
+ }
+ if l+8 > len(b) {
+ return nil, -1, errNoExtension
+ }
+ if !validExtensionHeader(b[l:]) {
+ if l == 128 {
+ return nil, -1, errNoExtension
+ }
+ l = 128
+ if !validExtensionHeader(b[l:]) {
+ return nil, -1, errNoExtension
+ }
+ }
+ var exts []Extension
+ for b = b[l+4:]; len(b) >= 4; {
+ ol := int(binary.BigEndian.Uint16(b[:2]))
+ if 4 > ol || ol > len(b) {
+ break
+ }
+ switch b[2] {
+ case classMPLSLabelStack:
+ ext, err := parseMPLSLabelStack(b[:ol])
+ if err != nil {
+ return nil, -1, err
+ }
+ exts = append(exts, ext)
+ case classInterfaceInfo:
+ ext, err := parseInterfaceInfo(b[:ol])
+ if err != nil {
+ return nil, -1, err
+ }
+ exts = append(exts, ext)
+ }
+ b = b[ol:]
+ }
+ return exts, l, nil
+}