From 14bb08c1df8db9ec6c8a05520d4eee67971235d9 Mon Sep 17 00:00:00 2001 From: Dimitri Sokolyuk Date: Thu, 27 Sep 2018 20:03:23 +0200 Subject: mod tidy --- vendor/golang.org/x/net/icmp/message.go | 157 -------------------------------- 1 file changed, 157 deletions(-) delete mode 100644 vendor/golang.org/x/net/icmp/message.go (limited to 'vendor/golang.org/x/net/icmp/message.go') diff --git a/vendor/golang.org/x/net/icmp/message.go b/vendor/golang.org/x/net/icmp/message.go deleted file mode 100644 index 4a78017..0000000 --- a/vendor/golang.org/x/net/icmp/message.go +++ /dev/null @@ -1,157 +0,0 @@ -// Copyright 2012 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 provides basic functions for the manipulation of -// messages used in the Internet Control Message Protocols, -// ICMPv4 and ICMPv6. -// -// ICMPv4 and ICMPv6 are defined in RFC 792 and RFC 4443. -// Multi-part message support for ICMP is defined in RFC 4884. -// ICMP extensions for MPLS are defined in RFC 4950. -// ICMP extensions for interface and next-hop identification are -// defined in RFC 5837. -// PROBE: A utility for probing interfaces is defined in RFC 8335. -package icmp // import "golang.org/x/net/icmp" - -import ( - "encoding/binary" - "errors" - "net" - - "golang.org/x/net/internal/iana" - "golang.org/x/net/ipv4" - "golang.org/x/net/ipv6" -) - -// BUG(mikio): This package is not implemented on JS, NaCl and Plan 9. - -var ( - errInvalidConn = errors.New("invalid connection") - errMessageTooShort = errors.New("message too short") - errHeaderTooShort = errors.New("header too short") - errBufferTooShort = errors.New("buffer too short") - errOpNoSupport = errors.New("operation not supported") - errNoExtension = errors.New("no extension") - errInvalidExtension = errors.New("invalid extension") -) - -func checksum(b []byte) uint16 { - csumcv := len(b) - 1 // checksum coverage - s := uint32(0) - for i := 0; i < csumcv; i += 2 { - s += uint32(b[i+1])<<8 | uint32(b[i]) - } - if csumcv&1 == 0 { - s += uint32(b[csumcv]) - } - s = s>>16 + s&0xffff - s = s + s>>16 - return ^uint16(s) -} - -// A Type represents an ICMP message type. -type Type interface { - Protocol() int -} - -// A Message represents an ICMP message. -type Message struct { - Type Type // type, either ipv4.ICMPType or ipv6.ICMPType - Code int // code - Checksum int // checksum - Body MessageBody // body -} - -// Marshal returns the binary encoding of the ICMP message m. -// -// For an ICMPv4 message, the returned message always contains the -// calculated checksum field. -// -// For an ICMPv6 message, the returned message contains the calculated -// checksum field when psh is not nil, otherwise the kernel will -// compute the checksum field during the message transmission. -// When psh is not nil, it must be the pseudo header for IPv6. -func (m *Message) Marshal(psh []byte) ([]byte, error) { - var mtype int - switch typ := m.Type.(type) { - case ipv4.ICMPType: - mtype = int(typ) - case ipv6.ICMPType: - mtype = int(typ) - default: - return nil, errInvalidConn - } - b := []byte{byte(mtype), byte(m.Code), 0, 0} - if m.Type.Protocol() == iana.ProtocolIPv6ICMP && psh != nil { - b = append(psh, b...) - } - if m.Body != nil && m.Body.Len(m.Type.Protocol()) != 0 { - mb, err := m.Body.Marshal(m.Type.Protocol()) - if err != nil { - return nil, err - } - b = append(b, mb...) - } - if m.Type.Protocol() == iana.ProtocolIPv6ICMP { - if psh == nil { // cannot calculate checksum here - return b, nil - } - off, l := 2*net.IPv6len, len(b)-len(psh) - binary.BigEndian.PutUint32(b[off:off+4], uint32(l)) - } - s := checksum(b) - // Place checksum back in header; using ^= avoids the - // assumption the checksum bytes are zero. - b[len(psh)+2] ^= byte(s) - b[len(psh)+3] ^= byte(s >> 8) - return b[len(psh):], nil -} - -var parseFns = map[Type]func(int, Type, []byte) (MessageBody, error){ - ipv4.ICMPTypeDestinationUnreachable: parseDstUnreach, - ipv4.ICMPTypeTimeExceeded: parseTimeExceeded, - ipv4.ICMPTypeParameterProblem: parseParamProb, - - ipv4.ICMPTypeEcho: parseEcho, - ipv4.ICMPTypeEchoReply: parseEcho, - ipv4.ICMPTypeExtendedEchoRequest: parseExtendedEchoRequest, - ipv4.ICMPTypeExtendedEchoReply: parseExtendedEchoReply, - - ipv6.ICMPTypeDestinationUnreachable: parseDstUnreach, - ipv6.ICMPTypePacketTooBig: parsePacketTooBig, - ipv6.ICMPTypeTimeExceeded: parseTimeExceeded, - ipv6.ICMPTypeParameterProblem: parseParamProb, - - ipv6.ICMPTypeEchoRequest: parseEcho, - ipv6.ICMPTypeEchoReply: parseEcho, - ipv6.ICMPTypeExtendedEchoRequest: parseExtendedEchoRequest, - ipv6.ICMPTypeExtendedEchoReply: parseExtendedEchoReply, -} - -// ParseMessage parses b as an ICMP message. -// Proto must be either the ICMPv4 or ICMPv6 protocol number. -func ParseMessage(proto int, b []byte) (*Message, error) { - if len(b) < 4 { - return nil, errMessageTooShort - } - var err error - m := &Message{Code: int(b[1]), Checksum: int(binary.BigEndian.Uint16(b[2:4]))} - switch proto { - case iana.ProtocolICMP: - m.Type = ipv4.ICMPType(b[0]) - case iana.ProtocolIPv6ICMP: - m.Type = ipv6.ICMPType(b[0]) - default: - return nil, errInvalidConn - } - if fn, ok := parseFns[m.Type]; !ok { - m.Body, err = parseDefaultMessageBody(proto, b[4:]) - } else { - m.Body, err = fn(proto, m.Type, b[4:]) - } - if err != nil { - return nil, err - } - return m, nil -} -- cgit v1.2.3