53 lines
1.2 KiB
Go
53 lines
1.2 KiB
Go
package common
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import (
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"bytes"
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"encoding/gob"
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"net"
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"github.com/pkg/errors"
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)
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// nodeMeta holds metadata sent over the cluster
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type nodeMeta struct {
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OverlayAddr net.IPNet
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Routes []net.IPNet
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PubKey string
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}
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// Node holds the memberlist node structure
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type Node struct {
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Name string
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Addr net.IP
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Meta []byte
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nodeMeta
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}
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func (n *Node) String() string {
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return n.Addr.String()
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}
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// EncodeMeta the node metadata to bytes, in a deterministic reversible way
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func (n *Node) EncodeMeta(limit int) ([]byte, error) {
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buf := &bytes.Buffer{}
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if err := gob.NewEncoder(buf).Encode(n.nodeMeta); err != nil {
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return nil, errors.Wrap(err, "could not encode local state")
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}
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if buf.Len() > limit {
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return nil, errors.Errorf("could not fit node metadata into %d bytes", limit)
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}
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return buf.Bytes(), nil
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}
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// DecodeMeta the node Meta field into its metadata
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func (n *Node) DecodeMeta() error {
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// TODO: we blindly trust the info we get from the peers; We should be more defensive to limit the damage a leaked
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// PSK can cause.
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nm := nodeMeta{}
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if err := gob.NewDecoder(bytes.NewReader(n.Meta)).Decode(&nm); err != nil {
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return errors.Wrap(err, "could not decode node meta")
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}
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n.nodeMeta = nm
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return nil
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}
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