From fbe80460a7eb34147b928fa1023b28a3c094c070 Mon Sep 17 00:00:00 2001 From: Ghanan Gowripalan Date: Thu, 26 Mar 2020 14:04:28 -0700 Subject: Handle IPv6 Fragment & Routing extension headers Enables the reassembly of fragmented IPv6 packets and handling of the Routing extension header with a Segments Left value of 0. Atomic fragments are handled as described in RFC 6946 to not interfere with "normal" fragment traffic. No specific routing header type is supported. Note, the stack does not yet support sending ICMPv6 error messages in response to IPv6 packets that cannot be handled/parsed. That will come in a later change (Issue #2211). Test: - header_test.TestIPv6RoutingExtHdr - header_test.TestIPv6FragmentExtHdr - header_test.TestIPv6ExtHdrIterErr - header_test.TestIPv6ExtHdrIter - ipv6_test.TestReceiveIPv6ExtHdrs - ipv6_test.TestReceiveIPv6Fragments RELNOTES: n/a PiperOrigin-RevId: 303189584 --- pkg/tcpip/buffer/view.go | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'pkg/tcpip/buffer') diff --git a/pkg/tcpip/buffer/view.go b/pkg/tcpip/buffer/view.go index 17e94c562..8d42cd066 100644 --- a/pkg/tcpip/buffer/view.go +++ b/pkg/tcpip/buffer/view.go @@ -15,6 +15,10 @@ // Package buffer provides the implementation of a buffer view. package buffer +import ( + "bytes" +) + // View is a slice of a buffer, with convenience methods. type View []byte @@ -45,6 +49,13 @@ func (v *View) CapLength(length int) { *v = (*v)[:length:length] } +// Reader returns a bytes.Reader for v. +func (v *View) Reader() bytes.Reader { + var r bytes.Reader + r.Reset(*v) + return r +} + // ToVectorisedView returns a VectorisedView containing the receiver. func (v View) ToVectorisedView() VectorisedView { return NewVectorisedView(len(v), []View{v}) @@ -162,3 +173,12 @@ func (vv *VectorisedView) AppendView(v View) { vv.views = append(vv.views, v) vv.size += len(v) } + +// Readers returns a bytes.Reader for each of vv's views. +func (vv *VectorisedView) Readers() []bytes.Reader { + readers := make([]bytes.Reader, 0, len(vv.views)) + for _, v := range vv.views { + readers = append(readers, v.Reader()) + } + return readers +} -- cgit v1.2.3