1 files changed, 75 insertions, 0 deletions
diff --git a/vendor/github.com/pion/sctp/chunk_heartbeat.go b/vendor/github.com/pion/sctp/chunk_heartbeat.go
new file mode 100644
index 0000000..f2026a4
--- /dev/null
+++ b/vendor/github.com/pion/sctp/chunk_heartbeat.go
@@ -0,0 +1,75 @@
+package sctp
+
+import (
+	"github.com/pkg/errors"
+)
+
+/*
+chunkHeartbeat represents an SCTP Chunk of type HEARTBEAT
+
+An endpoint should send this chunk to its peer endpoint to probe the
+reachability of a particular destination transport address defined in
+the present association.
+
+The parameter field contains the Heartbeat Information, which is a
+variable-length opaque data structure understood only by the sender.
+
+
+ 0                   1                   2                   3
+ 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
++-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+|   Type = 4    | Chunk  Flags  |      Heartbeat Length         |
++-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+|                                                               |
+|            Heartbeat Information TLV (Variable-Length)        |
+|                                                               |
++-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+
+Defined as a variable-length parameter using the format described
+in Section 3.2.1, i.e.:
+
+Variable Parameters                  Status     Type Value
+-------------------------------------------------------------
+heartbeat Info                       Mandatory   1
+
+*/
+type chunkHeartbeat struct {
+	chunkHeader
+	params []param
+}
+
+func (h *chunkHeartbeat) unmarshal(raw []byte) error {
+	if err := h.chunkHeader.unmarshal(raw); err != nil {
+		return err
+	} else if h.typ != ctHeartbeat {
+		return errors.Errorf("ChunkType is not of type HEARTBEAT, actually is %s", h.typ.String())
+	}
+
+	if len(raw) <= chunkHeaderSize {
+		return errors.Errorf("Heartbeat is not long enough to contain Heartbeat Info %d", len(raw))
+	}
+
+	pType, err := parseParamType(raw[chunkHeaderSize:])
+	if err != nil {
+		return errors.Wrap(err, "failed to parse param type")
+	}
+	if pType != heartbeatInfo {
+		return errors.Errorf("Heartbeat should only have HEARTBEAT param, instead have %s", pType.String())
+	}
+
+	p, err := buildParam(pType, raw[chunkHeaderSize:])
+	if err != nil {
+		return errors.Wrap(err, "Failed unmarshalling param in Heartbeat Chunk")
+	}
+	h.params = append(h.params, p)
+
+	return nil
+}
+
+func (h *chunkHeartbeat) Marshal() ([]byte, error) {
+	return nil, errors.Errorf("Unimplemented")
+}
+
+func (h *chunkHeartbeat) check() (abort bool, err error) {
+	return false, nil
+}