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Kernel: Refactor TCP/IP stack

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This has several significant changes to the networking stack.

* Significant refactoring of the TCP state machine. Right now it's
  probably more fragile than it used to be, but handles quite a lot
  more of the handshake process.
* `TCPSocket` holds a `NetworkAdapter*`, assigned during `connect()` or
  `bind()`, whichever comes first.
* `listen()` is now virtual in `Socket` and intended to be implemented
  in its child classes
* `listen()` no longer works without `bind()` - this is a bit of a
  regression, but listening sockets didn't work at all before, so it's
  not possible to observe the regression.
* A file is exposed at `/proc/net_tcp`, which is a JSON document listing
  the current TCP sockets with a bit of metadata.
* There's an `ETHERNET_VERY_DEBUG` flag for dumping packet's content out
  to `kprintf`. It is, indeed, _very debug_.
This commit is contained in:
Conrad Pankoff 2019-08-06 23:40:38 +10:00 • committed by Andreas Kling
parent c973a51a23
commit 73c998dbfc
12 changed files with 446 additions and 84 deletions
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7
Kernel/Net/Socket.h
View file

@ -1,8 +1,8 @@
#pragma once
#include <AK/HashTable.h>
#include <AK/RefPtr.h>
#include <AK/RefCounted.h>
#include <AK/RefPtr.h>
#include <AK/Vector.h>
#include <Kernel/FileSystem/File.h>
#include <Kernel/KResult.h>
@ -35,10 +35,10 @@ public:
bool can_accept() const { return !m_pending.is_empty(); }
RefPtr<Socket> accept();
bool is_connected() const { return m_connected; }
KResult listen(int backlog);
virtual KResult bind(const sockaddr*, socklen_t) = 0;
virtual KResult connect(FileDescription&, const sockaddr*, socklen_t, ShouldBlock) = 0;
virtual KResult listen(int) = 0;
virtual bool get_local_address(sockaddr*, socklen_t*) = 0;
virtual bool get_peer_address(sockaddr*, socklen_t*) = 0;
virtual bool is_local() const { return false; }
@ -73,6 +73,9 @@ protected:
void load_receive_deadline();
void load_send_deadline();
int backlog() const { return m_backlog; }
void set_backlog(int backlog) { m_backlog = backlog; }
virtual const char* class_name() const override { return "Socket"; }
private: