Kernel+ifconfig: Add an MTU value to NetworkAdapter

This defaults to 1500 for all adapters, but LoopbackAdapter increases
it to 65536 on construction.

If an IPv4 packet is larger than the MTU, we'll need to break it into
smaller fragments before transmitting it. This part is a FIXME. :^)

1 files changed, 2 insertions, 0 deletions

diff --git a/Userland/ifconfig.cpp b/Userland/ifconfig.cpp
index 48f32e184e..a67b7e1cf1 100644
--- a/Userland/ifconfig.cpp
+++ b/Userland/ifconfig.cpp
@@ -70,6 +70,7 @@ int main(int argc, char** argv)
         auto bytes_in = if_object.get("bytes_in").to_u32();
         auto packets_out = if_object.get("packets_out").to_u32();
         auto bytes_out = if_object.get("bytes_out").to_u32();
+        auto mtu = if_object.get("mtu").to_u32();
 
         printf("%s:\n", name.characters());
         printf("     mac: %s\n", mac_address.characters());
@@ -77,6 +78,7 @@ int main(int argc, char** argv)
         printf("   class: %s\n", class_name.characters());
         printf("      RX: %u packets %u bytes (%s)\n", packets_in, bytes_in, si_bytes(bytes_in).characters());
         printf("      TX: %u packets %u bytes (%s)\n", packets_out, bytes_out, si_bytes(bytes_out).characters());
+        printf("     MTU: %u\n", mtu);
         printf("\n");
     });