1 files changed, 31 insertions, 0 deletions
diff --git a/src/net/sock_linux.go b/src/net/sock_linux.go
new file mode 100644
index 000000000..cc5ce153b
--- /dev/null
+++ b/src/net/sock_linux.go
@@ -0,0 +1,31 @@
+// Copyright 2009 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package net
+
+import "syscall"
+
+func maxListenerBacklog() int {
+	fd, err := open("/proc/sys/net/core/somaxconn")
+	if err != nil {
+		return syscall.SOMAXCONN
+	}
+	defer fd.close()
+	l, ok := fd.readLine()
+	if !ok {
+		return syscall.SOMAXCONN
+	}
+	f := getFields(l)
+	n, _, ok := dtoi(f[0], 0)
+	if n == 0 || !ok {
+		return syscall.SOMAXCONN
+	}
+	// Linux stores the backlog in a uint16.
+	// Truncate number to avoid wrapping.
+	// See issue 5030.
+	if n > 1<<16-1 {
+		n = 1<<16 - 1
+	}
+	return n
+}