A signaling server for GB28181

pkg/service/stack/response.go

@@ -0,0 +1,25 @@
+package stack
+
+import (
+	"time"
+
+	"github.com/emiago/sipgo/sip"
+)
+
+const TIME_LAYOUT = "2024-01-01T00:00:00"
+const EXPIRES_TIME = 3600
+
+func NewRegisterResponse(req *sip.Request, code sip.StatusCode, reason string) *sip.Response {
+	resp := sip.NewResponseFromRequest(req, code, reason, nil)
+
+	newTo := &sip.ToHeader{Address: resp.To().Address, Params: sip.NewParams()}
+	newTo.Params.Add("tag", sip.GenerateTagN(10))
+
+	resp.ReplaceHeader(newTo)
+	resp.RemoveHeader("Allow")
+	expires := sip.ExpiresHeader(EXPIRES_TIME)
+	resp.AppendHeader(&expires)
+	resp.AppendHeader(sip.NewHeader("Date", time.Now().Format(TIME_LAYOUT)))
+
+	return resp
+}