From 4bf80833f49498c310877d532c92bde890cc7dc7 Mon Sep 17 00:00:00 2001
From: Jason Rhinelander <jason@imaginary.ca>
Date: Thu, 6 Oct 2022 14:50:05 -0300
Subject: [PATCH] Add InterfaceInfo formatter

---
 llarp/CMakeLists.txt         |  1 +
 llarp/net/interface_info.cpp | 15 +++++++++++++++
 llarp/net/interface_info.hpp |  8 ++++++++
 3 files changed, 24 insertions(+)
 create mode 100644 llarp/net/interface_info.cpp

diff --git a/llarp/CMakeLists.txt b/llarp/CMakeLists.txt
index a42c76bb1..2e3c558df 100644
--- a/llarp/CMakeLists.txt
+++ b/llarp/CMakeLists.txt
@@ -33,6 +33,7 @@ add_library(lokinet-platform
   # for networking
   ev/ev.cpp
   ev/libuv.cpp
+  net/interface_info.cpp
   net/ip.cpp
   net/ip_address.cpp
   net/ip_packet.cpp
diff --git a/llarp/net/interface_info.cpp b/llarp/net/interface_info.cpp
new file mode 100644
index 000000000..04490095b
--- /dev/null
+++ b/llarp/net/interface_info.cpp
@@ -0,0 +1,15 @@
+#include "interface_info.hpp"
+
+namespace llarp::net
+{
+  std::string
+  InterfaceInfo::ToString() const
+  {
+    return fmt::format(
+        "{}[i={}; addrs={}; gw={}]",
+        name,
+        index,
+        fmt::join(addrs, ","),
+        gateway ? fmt::format("{}", *gateway) : "none");
+  }
+}  // namespace llarp::net
diff --git a/llarp/net/interface_info.hpp b/llarp/net/interface_info.hpp
index c5d897264..a603b03bd 100644
--- a/llarp/net/interface_info.hpp
+++ b/llarp/net/interface_info.hpp
@@ -1,7 +1,9 @@
 #pragma once
 
+#include <optional>
 #include <string>
 #include <vector>
+#include <llarp/util/formattable.hpp>
 #include "ip_range.hpp"
 
 namespace llarp::net
@@ -17,5 +19,11 @@ namespace llarp::net
     std::vector<IPRange> addrs;
     /// a gateway we can use if it exists
     std::optional<ipaddr_t> gateway;
+
+    std::string
+    ToString() const;
   };
 }  // namespace llarp::net
+
+template <>
+inline constexpr bool llarp::IsToStringFormattable<llarp::net::InterfaceInfo> = true;