From 1b7ff5d76c7a3c67b6e0f9b51af78d1b227fdea3 Mon Sep 17 00:00:00 2001
From: Francis Lavoie <lavofr@gmail.com>
Date: Tue, 18 Jan 2022 13:29:07 -0500
Subject: httpcaddyfile: Add `default_bind` global option (#4531)

---
 caddyconfig/httpcaddyfile/addresses.go             |  6 ++-
 caddyconfig/httpcaddyfile/options.go               |  1 +
 .../global_options_default_bind.txt                | 52 ++++++++++++++++++++++
 3 files changed, 58 insertions(+), 1 deletion(-)
 create mode 100644 caddytest/integration/caddyfile_adapt/global_options_default_bind.txt

diff --git a/caddyconfig/httpcaddyfile/addresses.go b/caddyconfig/httpcaddyfile/addresses.go
index e2e7771..b33c0f0 100644
--- a/caddyconfig/httpcaddyfile/addresses.go
+++ b/caddyconfig/httpcaddyfile/addresses.go
@@ -213,7 +213,11 @@ func (st *ServerType) listenerAddrsForServerBlockKey(sblock serverBlock, key str
 		lnHosts = append(lnHosts, cfgVal.Value.([]string)...)
 	}
 	if len(lnHosts) == 0 {
-		lnHosts = []string{""}
+		if defaultBind, ok := options["default_bind"].(string); ok {
+			lnHosts = []string{defaultBind}
+		} else {
+			lnHosts = []string{""}
+		}
 	}
 
 	// use a map to prevent duplication
diff --git a/caddyconfig/httpcaddyfile/options.go b/caddyconfig/httpcaddyfile/options.go
index 91709cc..016d0df 100644
--- a/caddyconfig/httpcaddyfile/options.go
+++ b/caddyconfig/httpcaddyfile/options.go
@@ -29,6 +29,7 @@ func init() {
 	RegisterGlobalOption("debug", parseOptTrue)
 	RegisterGlobalOption("http_port", parseOptHTTPPort)
 	RegisterGlobalOption("https_port", parseOptHTTPSPort)
+	RegisterGlobalOption("default_bind", parseOptSingleString)
 	RegisterGlobalOption("grace_period", parseOptDuration)
 	RegisterGlobalOption("default_sni", parseOptSingleString)
 	RegisterGlobalOption("order", parseOptOrder)
diff --git a/caddytest/integration/caddyfile_adapt/global_options_default_bind.txt b/caddytest/integration/caddyfile_adapt/global_options_default_bind.txt
new file mode 100644
index 0000000..c34186e
--- /dev/null
+++ b/caddytest/integration/caddyfile_adapt/global_options_default_bind.txt
@@ -0,0 +1,52 @@
+{
+	default_bind tcp4/0.0.0.0
+}
+
+example.com {
+}
+
+example.org:12345 {
+}
+----------
+{
+	"apps": {
+		"http": {
+			"servers": {
+				"srv0": {
+					"listen": [
+						"tcp4/0.0.0.0:12345"
+					],
+					"routes": [
+						{
+							"match": [
+								{
+									"host": [
+										"example.org"
+									]
+								}
+							],
+							"terminal": true
+						}
+					]
+				},
+				"srv1": {
+					"listen": [
+						"tcp4/0.0.0.0:443"
+					],
+					"routes": [
+						{
+							"match": [
+								{
+									"host": [
+										"example.com"
+									]
+								}
+							],
+							"terminal": true
+						}
+					]
+				}
+			}
+		}
+	}
+}
\ No newline at end of file
-- 
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