diff options
Diffstat (limited to 'Godeps/_workspace/src/code.google.com/p/go.net/ipv6/mockicmp_test.go')
-rw-r--r-- | Godeps/_workspace/src/code.google.com/p/go.net/ipv6/mockicmp_test.go | 130 |
1 files changed, 0 insertions, 130 deletions
diff --git a/Godeps/_workspace/src/code.google.com/p/go.net/ipv6/mockicmp_test.go b/Godeps/_workspace/src/code.google.com/p/go.net/ipv6/mockicmp_test.go deleted file mode 100644 index c289355132..0000000000 --- a/Godeps/_workspace/src/code.google.com/p/go.net/ipv6/mockicmp_test.go +++ /dev/null @@ -1,130 +0,0 @@ -// Copyright 2013 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 ipv6_test - -import ( - "code.google.com/p/go.net/ipv6" - "errors" - "net" -) - -const ( - ipv6PseudoHeaderLen = 2*net.IPv6len + 8 - ianaProtocolIPv6ICMP = 58 -) - -func ipv6PseudoHeader(src, dst net.IP, nextHeader int) []byte { - b := make([]byte, ipv6PseudoHeaderLen) - copy(b[:net.IPv6len], src) - copy(b[net.IPv6len:], dst) - b[len(b)-1] = byte(nextHeader) - return b -} - -// icmpMessage represents an ICMP message. -type icmpMessage struct { - Type ipv6.ICMPType // type - Code int // code - Checksum int // checksum - Body icmpMessageBody // body -} - -// icmpMessageBody represents an ICMP message body. -type icmpMessageBody interface { - Len() int - Marshal() ([]byte, error) -} - -// Marshal returns the binary enconding of the ICMP echo request or -// reply message m. -func (m *icmpMessage) Marshal(psh []byte) ([]byte, error) { - b := []byte{byte(m.Type), byte(m.Code), 0, 0} - if psh != nil { - b = append(psh, b...) - } - if m.Body != nil && m.Body.Len() != 0 { - mb, err := m.Body.Marshal() - if err != nil { - return nil, err - } - b = append(b, mb...) - } - if psh == nil { - return b, nil - } - off, l := 2*net.IPv6len, len(b)-len(psh) - b[off], b[off+1], b[off+2], b[off+3] = byte(l>>24), byte(l>>16), byte(l>>8), byte(l) - 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 - // 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 -} - -// parseICMPMessage parses b as an ICMP message. -func parseICMPMessage(b []byte) (*icmpMessage, error) { - msglen := len(b) - if msglen < 4 { - return nil, errors.New("message too short") - } - m := &icmpMessage{Type: ipv6.ICMPType(b[0]), Code: int(b[1]), Checksum: int(b[2])<<8 | int(b[3])} - if msglen > 4 { - var err error - switch m.Type { - case ipv6.ICMPTypeEchoRequest, ipv6.ICMPTypeEchoReply: - m.Body, err = parseICMPEcho(b[4:]) - if err != nil { - return nil, err - } - } - } - return m, nil -} - -// imcpEcho represenets an ICMP echo request or reply message body. -type icmpEcho struct { - ID int // identifier - Seq int // sequence number - Data []byte // data -} - -func (p *icmpEcho) Len() int { - if p == nil { - return 0 - } - return 4 + len(p.Data) -} - -// Marshal returns the binary enconding of the ICMP echo request or -// reply message body p. -func (p *icmpEcho) Marshal() ([]byte, error) { - b := make([]byte, 4+len(p.Data)) - b[0], b[1] = byte(p.ID>>8), byte(p.ID) - b[2], b[3] = byte(p.Seq>>8), byte(p.Seq) - copy(b[4:], p.Data) - return b, nil -} - -// parseICMPEcho parses b as an ICMP echo request or reply message -// body. -func parseICMPEcho(b []byte) (*icmpEcho, error) { - bodylen := len(b) - p := &icmpEcho{ID: int(b[0])<<8 | int(b[1]), Seq: int(b[2])<<8 | int(b[3])} - if bodylen > 4 { - p.Data = make([]byte, bodylen-4) - copy(p.Data, b[4:]) - } - return p, nil -} |