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Kernel: Add a LoopbackAdapter for talking to yourself via 127.0.0.1.

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Choosing adapter for transmit is done by adapter_for_route_to(IPv4Address).
This is just hard-coded logic right now but can be expanded to support a
proper routing table.

Also start moving kernel networking code into Kernel/Net/.
This commit is contained in:
Andreas Kling
2019-04-02 15:46:44 +02:00
parent f8a1d2746e
commit 718bea73b3
11 changed files with 95 additions and 25 deletions
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10
Kernel/UDPSocket.cpp
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@@ -3,6 +3,7 @@
#include <Kernel/NetworkAdapter.h>
#include <Kernel/Process.h>
#include <Kernel/RandomDevice.h>
#include <Kernel/Net/Routing.h>
Lockable<HashMap<word, UDPSocket*>>& UDPSocket::sockets_by_port()
{
@@ -62,8 +63,9 @@ int UDPSocket::protocol_receive(const ByteBuffer& packet_buffer, void* buffer, s
int UDPSocket::protocol_send(const void* data, int data_length)
{
// FIXME: Figure out the adapter somehow differently.
auto& adapter = *NetworkAdapter::from_ipv4_address(IPv4Address(192, 168, 5, 2));
auto* adapter = adapter_for_route_to(destination_address());
if (!adapter)
return -EHOSTUNREACH;
auto buffer = ByteBuffer::create_zeroed(sizeof(UDPPacket) + data_length);
auto& udp_packet = *(UDPPacket*)(buffer.pointer());
udp_packet.set_source_port(source_port());
@@ -71,11 +73,11 @@ int UDPSocket::protocol_send(const void* data, int data_length)
udp_packet.set_length(sizeof(UDPPacket) + data_length);
memcpy(udp_packet.payload(), data, data_length);
kprintf("sending as udp packet from %s:%u to %s:%u!\n",
adapter.ipv4_address().to_string().characters(),
adapter->ipv4_address().to_string().characters(),
source_port(),
destination_address().to_string().characters(),
destination_port());
adapter.send_ipv4(MACAddress(), destination_address(), IPv4Protocol::UDP, move(buffer));
adapter->send_ipv4(MACAddress(), destination_address(), IPv4Protocol::UDP, move(buffer));
return data_length;
}