From a03b89039266b8e2a9cf95eef026365a863a8431 Mon Sep 17 00:00:00 2001
From: Viacheslav Hletenko <v.gletenko@vyos.io>
Date: Tue, 17 May 2022 11:19:07 +0000
Subject: op-mode: T4429: Ability to detect external IP address

In some cases, it is useful to detect own external IP address
for example if the host behind NAT

Send curl request to random online service from the list
to detect IP address

; show ip external
; 192.0.2.95
---
 op-mode-definitions/show-ip.xml.in |  6 ++++++
 src/op_mode/show_ip_external.sh    | 19 +++++++++++++++++++
 2 files changed, 25 insertions(+)
 create mode 100755 src/op_mode/show_ip_external.sh

diff --git a/op-mode-definitions/show-ip.xml.in b/op-mode-definitions/show-ip.xml.in
index 91564440d..30c08f8e8 100644
--- a/op-mode-definitions/show-ip.xml.in
+++ b/op-mode-definitions/show-ip.xml.in
@@ -7,6 +7,12 @@
           <help>Show IPv4 routing information</help>
         </properties>
         <children>
+          <node name="external">
+            <properties>
+              <help>Show IPv4 external address</help>
+            </properties>
+            <command>${vyos_op_scripts_dir}/show_ip_external.sh</command>
+          </node>
           <node name="neighbors">
             <properties>
               <help>Show IPv4 Neighbor Discovery (ND) information</help>
diff --git a/src/op_mode/show_ip_external.sh b/src/op_mode/show_ip_external.sh
new file mode 100755
index 000000000..275d05278
--- /dev/null
+++ b/src/op_mode/show_ip_external.sh
@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+
+# Detect an external IP address
+# Use random services for checking
+
+
+array=(
+    ipinfo.io/ip
+    ifconfig.me
+    ipecho.net/plain
+    icanhazip.com
+    v4.ident.me
+    checkip.amazonaws.com
+)
+
+size=${#array[@]}
+index=$(($RANDOM % $size))
+
+curl --silent ${array[$index]} | tr -d "[:space:]" && echo
-- 
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