add api & config

config/parsing/chain.go

@@ -0,0 +1,136 @@
+package parsing
+
+import (
+	"github.com/go-gost/core/chain"
+	tls_util "github.com/go-gost/core/common/util/tls"
+	"github.com/go-gost/core/connector"
+	"github.com/go-gost/core/dialer"
+	"github.com/go-gost/core/logger"
+	"github.com/go-gost/core/metadata"
+	"github.com/go-gost/core/registry"
+	"github.com/go-gost/x/config"
+)
+
+func ParseChain(cfg *config.ChainConfig) (chain.Chainer, error) {
+	if cfg == nil {
+		return nil, nil
+	}
+
+	chainLogger := logger.Default().WithFields(map[string]any{
+		"kind":  "chain",
+		"chain": cfg.Name,
+	})
+
+	c := chain.NewChain(cfg.Name)
+	selector := parseSelector(cfg.Selector)
+	for _, hop := range cfg.Hops {
+		group := &chain.NodeGroup{}
+		for _, v := range hop.Nodes {
+			nodeLogger := chainLogger.WithFields(map[string]any{
+				"kind":      "node",
+				"connector": v.Connector.Type,
+				"dialer":    v.Dialer.Type,
+				"hop":       hop.Name,
+				"node":      v.Name,
+			})
+			connectorLogger := nodeLogger.WithFields(map[string]any{
+				"kind": "connector",
+			})
+
+			tlsCfg := v.Connector.TLS
+			if tlsCfg == nil {
+				tlsCfg = &config.TLSConfig{}
+			}
+			tlsConfig, err := tls_util.LoadClientConfig(
+				tlsCfg.CertFile, tlsCfg.KeyFile, tlsCfg.CAFile,
+				tlsCfg.Secure, tlsCfg.ServerName)
+			if err != nil {
+				chainLogger.Error(err)
+				return nil, err
+			}
+
+			cr := registry.ConnectorRegistry().Get(v.Connector.Type)(
+				connector.AuthOption(parseAuth(v.Connector.Auth)),
+				connector.TLSConfigOption(tlsConfig),
+				connector.LoggerOption(connectorLogger),
+			)
+
+			if v.Connector.Metadata == nil {
+				v.Connector.Metadata = make(map[string]any)
+			}
+			if err := cr.Init(metadata.MapMetadata(v.Connector.Metadata)); err != nil {
+				connectorLogger.Error("init: ", err)
+				return nil, err
+			}
+
+			dialerLogger := nodeLogger.WithFields(map[string]any{
+				"kind": "dialer",
+			})
+
+			tlsCfg = v.Dialer.TLS
+			if tlsCfg == nil {
+				tlsCfg = &config.TLSConfig{}
+			}
+			tlsConfig, err = tls_util.LoadClientConfig(
+				tlsCfg.CertFile, tlsCfg.KeyFile, tlsCfg.CAFile,
+				tlsCfg.Secure, tlsCfg.ServerName)
+			if err != nil {
+				chainLogger.Error(err)
+				return nil, err
+			}
+
+			d := registry.DialerRegistry().Get(v.Dialer.Type)(
+				dialer.AuthOption(parseAuth(v.Dialer.Auth)),
+				dialer.TLSConfigOption(tlsConfig),
+				dialer.LoggerOption(dialerLogger),
+			)
+
+			if v.Dialer.Metadata == nil {
+				v.Dialer.Metadata = make(map[string]any)
+			}
+			if err := d.Init(metadata.MapMetadata(v.Dialer.Metadata)); err != nil {
+				dialerLogger.Error("init: ", err)
+				return nil, err
+			}
+
+			if v.Bypass == "" {
+				v.Bypass = hop.Bypass
+			}
+			if v.Resolver == "" {
+				v.Resolver = hop.Resolver
+			}
+			if v.Hosts == "" {
+				v.Hosts = hop.Hosts
+			}
+			if v.Interface == "" {
+				v.Interface = hop.Interface
+			}
+
+			tr := (&chain.Transport{}).
+				WithConnector(cr).
+				WithDialer(d).
+				WithAddr(v.Addr).
+				WithInterface(v.Interface)
+
+			node := &chain.Node{
+				Name:      v.Name,
+				Addr:      v.Addr,
+				Bypass:    registry.BypassRegistry().Get(v.Bypass),
+				Resolver:  registry.ResolverRegistry().Get(v.Resolver),
+				Hosts:     registry.HostsRegistry().Get(v.Hosts),
+				Marker:    &chain.FailMarker{},
+				Transport: tr,
+			}
+			group.AddNode(node)
+		}
+
+		sel := selector
+		if s := parseSelector(hop.Selector); s != nil {
+			sel = s
+		}
+		group.WithSelector(sel)
+		c.AddNodeGroup(group)
+	}
+
+	return c, nil
+}