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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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16
Kernel/NetworkTask.cpp
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@ -11,6 +11,7 @@
#include <Kernel/Process.h>
#include <Kernel/EtherType.h>
#include <Kernel/Lock.h>
#include <Kernel/Net/LoopbackAdapter.h>
//#define ETHERNET_DEBUG
#define IPV4_DEBUG
@ -34,16 +35,27 @@ Lockable<HashMap<IPv4Address, MACAddress>>& arp_table()
void NetworkTask_main()
{
LoopbackAdapter::the();
auto* adapter_ptr = E1000NetworkAdapter::the();
ASSERT(adapter_ptr);
auto& adapter = *adapter_ptr;
adapter.set_ipv4_address(IPv4Address(192, 168, 5, 2));
auto dequeue_packet = [&] () -> ByteBuffer {
if (LoopbackAdapter::the().has_queued_packets())
return LoopbackAdapter::the().dequeue_packet();
if (adapter.has_queued_packets())
return adapter.dequeue_packet();
return { };
};
kprintf("NetworkTask: Enter main loop.\n");
for (;;) {
auto packet = adapter.dequeue_packet();
auto packet = dequeue_packet();
if (packet.is_null()) {
current->snooze_until(adapter.packet_queue_alarm());
// FIXME: Wake up when one of the adapters has packets.
current->sleep(1);
continue;
}
if (packet.size() < (int)(sizeof(EthernetFrameHeader))) {