Keep tabs on memory usage

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

wireguard-go-bridge/Makefile

@@ -2,7 +2,7 @@
 #
 # Copyright (C) 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
 
-FILES := $(filter-out %/main.go,$(wildcard ../wireguard-go/*/*.go) $(wildcard ../wireguard-go/*.go))
+FILES := $(filter-out %/main.go %/queueconstants.go,$(wildcard ../wireguard-go/*/*.go) $(wildcard ../wireguard-go/*.go))
 
 ARCHES := arm64 armv7 x86_64
 GOARCH_arm64 := arm64

wireguard-go-bridge/src/git.zx2c4.com/wireguard-go/api-ios.go

@@ -52,7 +52,6 @@ var tunnelHandles map[int32]*Device
 
 func init() {
 	versionString = C.CString(WireGuardGoVersion)
-	preallocatedBuffers = 64
 	roamingDisabled = true
 	tunnelHandles = make(map[int32]*Device)
 	signals := make(chan os.Signal)

wireguard-go-bridge/src/git.zx2c4.com/wireguard-go/queueconstants.go

@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * Copyright (C) 2017-2018 WireGuard LLC. All Rights Reserved.
+ */
+
+package main
+
+/* Fit within memory limits for iOS */
+
+const (
+        QueueOutboundSize          = 1024
+        QueueInboundSize           = 1024
+        QueueHandshakeSize         = 1024
+        MaxSegmentSize             = 1700
+        PreallocatedBuffersPerPool = 1024
+)