add tunnel handler and connector

handler/tunnel/metadata.go

@@ -0,0 +1,62 @@
+package tunnel
+
+import (
+	"strings"
+	"time"
+
+	"github.com/go-gost/core/ingress"
+	"github.com/go-gost/core/logger"
+	mdata "github.com/go-gost/core/metadata"
+	mdutil "github.com/go-gost/core/metadata/util"
+	"github.com/go-gost/relay"
+	xingress "github.com/go-gost/x/ingress"
+	"github.com/go-gost/x/registry"
+)
+
+type metadata struct {
+	readTimeout  time.Duration
+	hash         string
+	directTunnel bool
+	entryPointID relay.TunnelID
+	ingress      ingress.Ingress
+}
+
+func (h *tunnelHandler) parseMetadata(md mdata.Metadata) (err error) {
+	const (
+		readTimeout  = "readTimeout"
+		entryPointID = "entrypoint.id"
+		hash         = "hash"
+	)
+
+	h.md.readTimeout = mdutil.GetDuration(md, readTimeout)
+
+	h.md.hash = mdutil.GetString(md, hash)
+
+	h.md.directTunnel = mdutil.GetBool(md, "tunnel.direct")
+	h.md.entryPointID = parseTunnelID(mdutil.GetString(md, entryPointID))
+
+	h.md.ingress = registry.IngressRegistry().Get(mdutil.GetString(md, "ingress"))
+	if h.md.ingress == nil {
+		var rules []xingress.Rule
+		for _, s := range strings.Split(mdutil.GetString(md, "tunnel"), ",") {
+			ss := strings.SplitN(s, ":", 2)
+			if len(ss) != 2 {
+				continue
+			}
+			rules = append(rules, xingress.Rule{
+				Hostname: ss[0],
+				Endpoint: ss[1],
+			})
+		}
+		if len(rules) > 0 {
+			h.md.ingress = xingress.NewIngress(
+				xingress.RulesOption(rules),
+				xingress.LoggerOption(logger.Default().WithFields(map[string]any{
+					"kind": "ingress",
+				})),
+			)
+		}
+	}
+
+	return
+}