From f900e4ea3f5bdbb6a4c7c51675d48e096b5d21f6 Mon Sep 17 00:00:00 2001
From: DDDHuang <44492639+DDDHuang@users.noreply.github.com>
Date: Wed, 1 Jun 2022 15:35:09 +0800
Subject: [PATCH] feat: add rpc server listener bind ip config

---
 etc/emqx.conf    | 11 ++++++++++-
 priv/emqx.schema | 17 +++++++++++++++++
 rebar.config     |  2 +-
 3 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/etc/emqx.conf b/etc/emqx.conf
index 858079d15..a4892c610 100644
--- a/etc/emqx.conf
+++ b/etc/emqx.conf
@@ -352,7 +352,16 @@ rpc.async_batch_size = 256
 ## Defaults to `stateless`.
 rpc.port_discovery = stateless
 
-rpc.tcp_server_ip = 0.0.0.0
+## If the host of an Erlang node has many network interfaces,
+## this parameter specifies which one for RPC server to listen on.
+## For the type definition of ip_address(), see inet(3).
+##
+## See: http://www.erlang.org/doc/man/kernel_app.html
+##
+## Value: IP Address, [0-255].[0-255].[0-255].[0-255]
+## Default: 0.0.0.0
+## 0.0.0.0 means all network interfaces.
+#rpc.tcp_server_ip = 0.0.0.0
 
 ## TCP port number for RPC server to listen on.
 ##
diff --git a/priv/emqx.schema b/priv/emqx.schema
index e5bd24633..b4f456f36 100644
--- a/priv/emqx.schema
+++ b/priv/emqx.schema
@@ -406,6 +406,23 @@ end}.
   {datatype, integer}
 ]}.
 
+%% RPC server, network interface.
+{mapping, "rpc.tcp_server_ip", "gen_rpc.socket_ip", [
+  {default, "0.0.0.0"},
+  {datatype, string}
+]}.
+
+{translation, "gen_rpc.socket_ip",
+fun(Conf) ->
+  Addr = cuttlefish:conf_get("rpc.tcp_server_ip", Conf, "0.0.0.0"),
+  case inet:parse_address(Addr) of
+    {ok, IP} ->
+      IP;
+    _ ->
+      error({bad_gen_rpc_socket_ip, Addr})
+  end
+end}.
+
 %% Number of tcp connections when connecting to RPC server
 {mapping, "rpc.tcp_client_num", "gen_rpc.tcp_client_num", [
   {default, 0},
diff --git a/rebar.config b/rebar.config
index 2307f3620..4288bcd84 100644
--- a/rebar.config
+++ b/rebar.config
@@ -46,7 +46,7 @@
     , {cowboy, {git, "https://github.com/emqx/cowboy", {tag, "2.8.2"}}}
     , {esockd, {git, "https://github.com/emqx/esockd", {tag, "5.8.5"}}}
     , {ekka, {git, "https://github.com/emqx/ekka", {tag, "0.8.1.10"}}}
-    , {gen_rpc, {git, "https://github.com/emqx/gen_rpc", {tag, "2.5.1"}}}
+    , {gen_rpc, {git, "https://github.com/emqx/gen_rpc", {tag, "2.5.2"}}}
     , {cuttlefish, {git, "https://github.com/emqx/cuttlefish", {tag, "v3.3.6"}}}
     , {minirest, {git, "https://github.com/emqx/minirest", {tag, "0.3.7"}}}
     , {ecpool, {git, "https://github.com/emqx/ecpool", {tag, "0.5.2"}}}