From ee35e71b2877e1e3775d712c632984526c667167 Mon Sep 17 00:00:00 2001
From: Jason Volk <jason@zemos.net>
Date: Mon, 25 Mar 2019 15:17:09 -0700
Subject: [PATCH] construct: Add program option -no6 to disable ipv6 at
 startup.

---
 construct/construct.cc | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/construct/construct.cc b/construct/construct.cc
index 736056c6d..e820fe954 100644
--- a/construct/construct.cc
+++ b/construct/construct.cc
@@ -32,6 +32,7 @@ bool pitrecdb;
 bool nojs;
 bool nodirect;
 bool noaio;
+bool no6;
 const char *execute;
 lgetopt opts[] =
 {
@@ -48,6 +49,7 @@ lgetopt opts[] =
 	{ "nojs",       &nojs,          lgetopt::BOOL,    "Disable SpiderMonkey JS subsystem from initializing. (noop when not available)." },
 	{ "nodirect",   &nodirect,      lgetopt::BOOL,    "Disable direct IO (O_DIRECT) for unsupporting filesystems." },
 	{ "noaio",      &noaio,         lgetopt::BOOL,    "Disable the AIO interface in favor of traditional syscalls. " },
+	{ "no6",        &no6,           lgetopt::BOOL,    "Disable IPv6 operations" },
 	{ nullptr,      nullptr,        lgetopt::STRING,  nullptr },
 };
 
@@ -273,4 +275,7 @@ applyargs()
 		ircd::fs::aio::enable.set("false");
 	else
 		ircd::fs::aio::enable.set("true");
+
+	if(no6)
+		ircd::net::enable_ipv6.set("false");
 }