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IPv4: More hacking on bringing up TCP support.

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This was a bit more complicated than I expected, but it's moving forward.
This commit is contained in:
Andreas Kling 2019-03-13 23:14:30 +01:00
parent 7aba68d51c
commit 032d9d7065
7 changed files with 193 additions and 33 deletions
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25
Kernel/IPv4Socket.h
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@ -7,6 +7,18 @@
#include <AK/Lock.h>
#include <AK/SinglyLinkedList.h>
class NetworkAdapter;
class TCPPacket;
enum TCPState {
Disconnected,
Connecting1,
Connecting2,
Connected,
Disconnecting1,
Disconnecting2,
};
class IPv4Socket final : public Socket {
public:
static Retained<IPv4Socket> create(int type, int protocol);
@ -35,11 +47,20 @@ public:
word source_port() const { return m_source_port; }
word destination_port() const { return m_destination_port; }
void send_tcp_packet(NetworkAdapter&, word flags, const void* payload = nullptr, size_t = 0);
void set_tcp_state(TCPState state) { m_tcp_state = state; }
TCPState tcp_state() const { return m_tcp_state; }
void set_tcp_ack_number(dword n) { m_tcp_ack_number = n; }
void set_tcp_sequence_number(dword n) { m_tcp_sequence_number = n; }
dword tcp_ack_number() const { return m_tcp_ack_number; }
dword tcp_sequence_number() const { return m_tcp_sequence_number; }
private:
IPv4Socket(int type, int protocol);
virtual bool is_ipv4() const override { return true; }
void allocate_source_port_if_needed();
NetworkOrdered<word> compute_tcp_checksum(const IPv4Address& source, const IPv4Address& destination, const TCPPacket&, word payload_size);
bool m_bound { false };
int m_attached_fds { 0 };
@ -53,6 +74,10 @@ private:
word m_source_port { 0 };
word m_destination_port { 0 };
dword m_tcp_sequence_number { 0 };
dword m_tcp_ack_number { 0 };
TCPState m_tcp_state { Disconnected };
Lock m_lock;
bool m_can_read { false };
};