From 6ed39e657b9152e41a85a777789ec71d60ba5f27 Mon Sep 17 00:00:00 2001
From: Handa Wang <handaw@google.com>
Date: Mon, 17 Mar 2025 22:08:44 +0800
Subject: [PATCH] [posix] add an option to disable `resolv.conf` on
 initialization (#11343)

On Android we didn't have a chance to disable reading from
`resolv.conf` at initialization of `Resolver`. This caused a logging
line at critical level which could be confusing.
---
 src/posix/platform/openthread-posix-config.h | 9 +++++++++
 src/posix/platform/resolver.hpp              | 2 +-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/posix/platform/openthread-posix-config.h b/src/posix/platform/openthread-posix-config.h
index 1e85bd5d0..b8407cd08 100644
--- a/src/posix/platform/openthread-posix-config.h
+++ b/src/posix/platform/openthread-posix-config.h
@@ -435,4 +435,13 @@
 #define OPENTHREAD_POSIX_CONFIG_TMP_STORAGE_ENABLE 1
 #endif
 
+/**
+ * @def OPENTHREAD_POSIX_CONFIG_RESOLV_CONF_ENABLED_INIT
+ *
+ * Define as 1 to enable reading from resolv.conf on initialization.
+ */
+#ifndef OPENTHREAD_POSIX_CONFIG_RESOLV_CONF_ENABLED_INIT
+#define OPENTHREAD_POSIX_CONFIG_RESOLV_CONF_ENABLED_INIT (!OPENTHREAD_POSIX_CONFIG_ANDROID_ENABLE)
+#endif
+
 #endif // OPENTHREAD_PLATFORM_POSIX_CONFIG_H_
diff --git a/src/posix/platform/resolver.hpp b/src/posix/platform/resolver.hpp
index 94830124d..db63ba1ac 100644
--- a/src/posix/platform/resolver.hpp
+++ b/src/posix/platform/resolver.hpp
@@ -123,7 +123,7 @@ private:
     void TryRefreshDnsServerList(void);
     void LoadDnsServerListFromConf(void);
 
-    bool         mIsResolvConfEnabled    = true;
+    bool         mIsResolvConfEnabled    = OPENTHREAD_POSIX_CONFIG_RESOLV_CONF_ENABLED_INIT;
     uint32_t     mUpstreamDnsServerCount = 0;
     otIp6Address mUpstreamDnsServerList[kMaxUpstreamServerCount];
     uint64_t     mUpstreamDnsServerListFreshness = 0;