Add exit node selection to the clients

server/routers/newt/handleNewtExitNodesRequestMessage.ts

@@ -2,14 +2,17 @@ import { db, sites } from "@server/db";
 import { MessageHandler } from "@server/routers/ws";
 import { exitNodes, Newt } from "@server/db";
 import logger from "@server/logger";
-import { ne, eq, or, and, count } from "drizzle-orm";
+import { eq } from "drizzle-orm";
 import { listExitNodes } from "#dynamic/lib/exitNodes";
+import { calculateExitNodeWeight } from "@server/lib/exitNodes";
 
-export const handleNewtPingRequestMessage: MessageHandler = async (context) => {
+export const handleNewtExitNodesRequestMessage: MessageHandler = async (
+    context
+) => {
     const { message, client, sendToClient } = context;
     const newt = client as Newt;
 
-    logger.info("Handling ping request newt message!");
+    logger.info("Handling exit nodes request newt message!");
 
     if (!newt) {
         logger.warn("Newt not found");
@@ -54,32 +57,13 @@ export const handleNewtPingRequestMessage: MessageHandler = async (context) => {
 
     const exitNodesPayload = await Promise.all(
         exitNodesList.map(async (node) => {
-            // (MAX_CONNECTIONS - current_connections) / MAX_CONNECTIONS)
-            // higher = more desirable
-            // like saying, this node has x% of its capacity left
+            const weight = await calculateExitNodeWeight(
+                node.exitNodeId,
+                node.maxConnections
+            );
 
-            let weight = 1;
-            const maxConnections = node.maxConnections;
-            if (maxConnections !== null && maxConnections !== undefined) {
-                const [currentConnections] = await db
-                    .select({
-                        count: count()
-                    })
-                    .from(sites)
-                    .where(
-                        and(
-                            eq(sites.exitNodeId, node.exitNodeId),
-                            eq(sites.online, true)
-                        )
-                    );
-
-                if (currentConnections.count >= maxConnections) {
-                    return null;
-                }
-
-                weight =
-                    (maxConnections - currentConnections.count) /
-                    maxConnections;
+            if (weight === null) {
+                return null;
             }
 
             return {

server/routers/newt/handleNewtRegisterMessage.ts

@@ -7,6 +7,7 @@ import logger from "@server/logger";
 import config from "@server/lib/config";
 import { findNextAvailableCidr } from "@server/lib/ip";
 import {
+    ExitNodePingResult,
     selectBestExitNode,
     verifyExitNodeOrgAccess
 } from "#dynamic/lib/exitNodes";
@@ -15,16 +16,6 @@ import { lockManager } from "#dynamic/lib/lock";
 import { buildTargetConfigurationForNewtClient } from "./buildConfiguration";
 import { canCompress } from "@server/lib/clientVersionChecks";
 
-export type ExitNodePingResult = {
-    exitNodeId: number;
-    latencyMs: number;
-    weight: number;
-    error?: string;
-    exitNodeName: string;
-    endpoint: string;
-    wasPreviouslyConnected: boolean;
-};
-
 export const handleNewtRegisterMessage: MessageHandler = async (context) => {
     const { message, client, sendToClient } = context;
     const newt = client as Newt;

server/routers/newt/index.ts

@@ -5,7 +5,7 @@ export * from "./handleNewtRegisterMessage";
 export * from "./handleReceiveBandwidthMessage";
 export * from "./handleNewtGetConfigMessage";
 export * from "./handleSocketMessages";
-export * from "./handleNewtPingRequestMessage";
+export * from "./handleNewtExitNodesRequestMessage";
 export * from "./handleApplyBlueprintMessage";
 export * from "./handleNewtPingMessage";
 export * from "./handleNewtDisconnectingMessage";