From dcfcccda560e94d68e8528b720a44233541b3c2f Mon Sep 17 00:00:00 2001
From: Muaz Ahmad <mahmad2000@protonmail.com>
Date: Sat, 18 May 2024 13:53:50 +0500
Subject: [PATCH] Allow either a valid scope_id or the device name as valid
 input for the interface

---
 src/util.zig | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/src/util.zig b/src/util.zig
index dd2b437..1193ca5 100644
--- a/src/util.zig
+++ b/src/util.zig
@@ -64,9 +64,15 @@ pub fn get_input() !struct {
     const ip_ver_str = args.next() orelse return ArgError.NotEnoughArgs;
     const ip_ver = std.meta.intToEnum(IP_VER_ENUM, std.fmt.parseInt(u3, ip_ver_str, 10) catch return ArgError.InvalidAddressVer) catch return ArgError.InvalidAddressVer;
 
-    const iface = try std.fmt.parseInt(c_int, args.next() orelse return ArgError.NotEnoughArgs, 10);
-    if (iface < 0) {
-        return ArgError.InvalidInterface;
+    var iface: c_int = undefined;
+    if (args.next()) |iface_str| {
+        iface = std.fmt.parseInt(c_int, iface_str, 10) catch |err| blk: {
+            if (err == std.fmt.ParseIntError.Overflow) return err;
+            break :blk std.c.if_nametoindex(iface_str);
+        };
+        if (iface <= 0) return ArgError.InvalidInterface;
+    } else {
+        return ArgError.NotEnoughArgs;
     }
     return .{ domain, IPInfo{ .version = ip_ver, .interface = iface } };
 }