api: add node info

Signed-off-by: HeshamTB <hishaminv@gmail.com>

cmd/hvpn-node/hvpn-node.go

@@ -53,6 +53,7 @@ func run(ctx *cli.Context) {
     slog.Debug("Starting run()")
 
     apiMux := http.NewServeMux()
+    apiMux.HandleFunc("GET /node", hvpnnode3.HandleGetNodeInfo(wgLink))
     apiMux.HandleFunc("GET /peer/{pubkey}", hvpnnode3.HandleGetPeer(wgLink))
     apiMux.HandleFunc("POST /peer", hvpnnode3.HandlePostPeer(wgLink))
     apiMux.HandleFunc("DELETE /peer/{pubkey}", hvpnnode3.HandleDeletePeer(wgLink))

handlers.go

@@ -17,6 +17,26 @@ import (
 type CtxKey string
 const CtxReqID CtxKey = "request_id"
 
+func HandleGetNodeInfo(wgLink *WGLink) http.HandlerFunc {
+    return func(w http.ResponseWriter, r *http.Request) {
+        reqID := r.Context().Value(CtxReqID).(uuid.UUID)
+        debug("Preparing node info for", reqID)
+        dev, err := wgLink.Device(wgLink.Name)
+        if err != nil {
+            w.WriteHeader(http.StatusInternalServerError)
+            return
+        }
+
+        json.NewEncoder(w).Encode(
+            proto.NodePublicInfo{
+                PublicKey: dev.PublicKey.String(),
+                UDPPort: dev.ListenPort,
+                // TODO: Send endpoint for clients to connect
+            },
+        )
+    }
+}
+
 func HandleGetPeer(wgLink *WGLink) http.HandlerFunc {
     return func(w http.ResponseWriter, r *http.Request) {
         reqID :=  r.Context().Value(CtxReqID).(uuid.UUID)

proto/node.go

@@ -0,0 +1,7 @@
+package proto
+
+type NodePublicInfo struct {
+    PublicKey string `json:"public_key"`
+    UDPPort int `json:"udp_port"`
+    Endpoint string `json:"endpoint"`
+}