diff options
Diffstat (limited to 'test/packetimpact/testbench/layers.go')
| -rw-r--r-- | test/packetimpact/testbench/layers.go | 40 |
1 files changed, 32 insertions, 8 deletions
diff --git a/test/packetimpact/testbench/layers.go b/test/packetimpact/testbench/layers.go index a35562ca8..af7a2ba4e 100644 --- a/test/packetimpact/testbench/layers.go +++ b/test/packetimpact/testbench/layers.go @@ -879,6 +879,9 @@ type ICMPv4 struct { Type *header.ICMPv4Type Code *header.ICMPv4Code Checksum *uint16 + Ident *uint16 + Sequence *uint16 + Payload []byte } func (l *ICMPv4) String() string { @@ -887,7 +890,7 @@ func (l *ICMPv4) String() string { // ToBytes implements Layer.ToBytes. func (l *ICMPv4) ToBytes() ([]byte, error) { - b := make([]byte, header.ICMPv4MinimumSize) + b := make([]byte, header.ICMPv4MinimumSize+len(l.Payload)) h := header.ICMPv4(b) if l.Type != nil { h.SetType(*l.Type) @@ -895,15 +898,33 @@ func (l *ICMPv4) ToBytes() ([]byte, error) { if l.Code != nil { h.SetCode(*l.Code) } + if copied := copy(h.Payload(), l.Payload); copied != len(l.Payload) { + panic(fmt.Sprintf("wrong number of bytes copied into h.Payload(): got = %d, want = %d", len(h.Payload()), len(l.Payload))) + } + if l.Ident != nil { + h.SetIdent(*l.Ident) + } + if l.Sequence != nil { + h.SetSequence(*l.Sequence) + } + + // The checksum must be handled last because the ICMPv4 header fields are + // included in the computation. if l.Checksum != nil { h.SetChecksum(*l.Checksum) - return h, nil - } - payload, err := payload(l) - if err != nil { - return nil, err + } else { + // Compute the checksum based on the ICMPv4.Payload and also the subsequent + // layers. + payload, err := payload(l) + if err != nil { + return nil, err + } + var vv buffer.VectorisedView + vv.AppendView(buffer.View(l.Payload)) + vv.Append(payload) + h.SetChecksum(header.ICMPv4Checksum(h, vv)) } - h.SetChecksum(header.ICMPv4Checksum(h, payload)) + return h, nil } @@ -915,8 +936,11 @@ func parseICMPv4(b []byte) (Layer, layerParser) { Type: ICMPv4Type(h.Type()), Code: ICMPv4Code(h.Code()), Checksum: Uint16(h.Checksum()), + Ident: Uint16(h.Ident()), + Sequence: Uint16(h.Sequence()), + Payload: h.Payload(), } - return &icmpv4, parsePayload + return &icmpv4, nil } func (l *ICMPv4) match(other Layer) bool { |