IPv4: Support overriding the default TTL (64)

Made getsockopt() and setsockopt() virtual so we can handle them in the
various Socket subclasses. The subclasses map kinda nicely to "levels".

This will allow us to implement things like "traceroute", although..
I spent some time trying to do that, but then hit a wall when it turned
out that the user-mode networking in QEMU doesn't preserve TTL in the
ICMP packets passing through.

1 files changed, 1 insertions, 1 deletions

diff --git a/Kernel/Net/UDPSocket.cpp b/Kernel/Net/UDPSocket.cpp
index da6f6d140f..103c824226 100644
--- a/Kernel/Net/UDPSocket.cpp
+++ b/Kernel/Net/UDPSocket.cpp
@@ -77,7 +77,7 @@ int UDPSocket::protocol_send(const void* data, int data_length)
         local_port(),
         peer_address().to_string().characters(),
         peer_port());
-    routing_decision.adapter->send_ipv4(routing_decision.next_hop, peer_address(), IPv4Protocol::UDP, buffer.data(), buffer.size());
+    routing_decision.adapter->send_ipv4(routing_decision.next_hop, peer_address(), IPv4Protocol::UDP, buffer.data(), buffer.size(), ttl());
     return data_length;
 }