From 7d49af822a7c38e0e4f5098014ba224695342aeb Mon Sep 17 00:00:00 2001
From: Essem <smswessem@gmail.com>
Date: Tue, 15 Aug 2023 03:44:06 +0000
Subject: [PATCH] Add address bind config option

---
 .config/example.yml                  | 3 +++
 packages/backend/src/config/types.ts | 1 +
 packages/backend/src/misc/fetch.ts   | 4 ++++
 3 files changed, 8 insertions(+)

diff --git a/.config/example.yml b/.config/example.yml
index e28a20a3c..c4c634007 100644
--- a/.config/example.yml
+++ b/.config/example.yml
@@ -161,6 +161,9 @@ reservedUsernames: [
 # deliverJobMaxAttempts: 12
 # inboxJobMaxAttempts: 8
 
+# Local address used for outgoing requests
+#outgoingAddress: 127.0.0.1
+
 # IP address family used for outgoing request (ipv4, ipv6 or dual)
 #outgoingAddressFamily: ipv4
 
diff --git a/packages/backend/src/config/types.ts b/packages/backend/src/config/types.ts
index 7ead804a6..52854db5a 100644
--- a/packages/backend/src/config/types.ts
+++ b/packages/backend/src/config/types.ts
@@ -78,6 +78,7 @@ export type Source = {
 		fingerprint?: string;
 	};
 
+	outgoingAddress?: string;
 	outgoingAddressFamily?: "ipv4" | "ipv6" | "dual";
 
 	deliverJobConcurrency?: number;
diff --git a/packages/backend/src/misc/fetch.ts b/packages/backend/src/misc/fetch.ts
index 0e673ba3a..e47ef0d47 100644
--- a/packages/backend/src/misc/fetch.ts
+++ b/packages/backend/src/misc/fetch.ts
@@ -99,6 +99,7 @@ const _http = new http.Agent({
 	keepAlive: true,
 	keepAliveMsecs: 30 * 1000,
 	lookup: cache.lookup,
+	localAddress: config.outgoingAddress,
 } as http.AgentOptions);
 
 /**
@@ -108,6 +109,7 @@ const _https = new https.Agent({
 	keepAlive: true,
 	keepAliveMsecs: 30 * 1000,
 	lookup: cache.lookup,
+	localAddress: config.outgoingAddress,
 } as https.AgentOptions);
 
 const maxSockets = Math.max(256, config.deliverJobConcurrency || 128);
@@ -123,6 +125,7 @@ export const httpAgent = config.proxy
 			maxFreeSockets: 256,
 			scheduling: "lifo",
 			proxy: config.proxy,
+			localAddress: config.outgoingAddress,
 	  })
 	: _http;
 
@@ -137,6 +140,7 @@ export const httpsAgent = config.proxy
 			maxFreeSockets: 256,
 			scheduling: "lifo",
 			proxy: config.proxy,
+			localAddress: config.outgoingAddress,
 	  })
 	: _https;