102 lines
2.0 KiB
Go
102 lines
2.0 KiB
Go
package hop
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import (
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"bytes"
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"context"
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"encoding/json"
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"io"
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"github.com/go-gost/core/chain"
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"github.com/go-gost/core/hop"
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"github.com/go-gost/core/logger"
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"github.com/go-gost/plugin/hop/proto"
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"github.com/go-gost/x/config"
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node_parser "github.com/go-gost/x/config/parsing/node"
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ctxvalue "github.com/go-gost/x/internal/ctx"
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"github.com/go-gost/x/internal/plugin"
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"google.golang.org/grpc"
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)
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type grpcPlugin struct {
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name string
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conn grpc.ClientConnInterface
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client proto.HopClient
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log logger.Logger
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}
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// NewGRPCPlugin creates a Hop plugin based on gRPC.
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func NewGRPCPlugin(name string, addr string, opts ...plugin.Option) hop.Hop {
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var options plugin.Options
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for _, opt := range opts {
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opt(&options)
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}
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log := logger.Default().WithFields(map[string]any{
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"kind": "hop",
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"hop": name,
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})
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conn, err := plugin.NewGRPCConn(addr, &options)
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if err != nil {
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log.Error(err)
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}
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p := &grpcPlugin{
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name: name,
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conn: conn,
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log: log,
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}
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if conn != nil {
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p.client = proto.NewHopClient(conn)
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}
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return p
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}
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func (p *grpcPlugin) Select(ctx context.Context, opts ...hop.SelectOption) *chain.Node {
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if p.client == nil {
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return nil
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}
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var options hop.SelectOptions
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for _, opt := range opts {
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opt(&options)
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}
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r, err := p.client.Select(ctx,
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&proto.SelectRequest{
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Network: options.Network,
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Addr: options.Addr,
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Host: options.Host,
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Path: options.Path,
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Client: string(ctxvalue.ClientIDFromContext(ctx)),
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Src: string(ctxvalue.ClientAddrFromContext(ctx)),
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})
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if err != nil {
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p.log.Error(err)
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return nil
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}
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if r.Node == nil {
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return nil
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}
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var cfg config.NodeConfig
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if err := json.NewDecoder(bytes.NewReader(r.Node)).Decode(&cfg); err != nil {
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p.log.Error(err)
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return nil
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}
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node, err := node_parser.ParseNode(p.name, &cfg, logger.Default())
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if err != nil {
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p.log.Error(err)
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return nil
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}
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return node
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}
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func (p *grpcPlugin) Close() error {
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if closer, ok := p.conn.(io.Closer); ok {
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return closer.Close()
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}
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return nil
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}
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