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Net: Add a basic sys$shutdown() implementation

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Calling shutdown prevents further reads and/or writes on a socket.
We should do a few more things based on the type of socket, but this
initial implementation just puts the basic mechanism in place.

Work towards #428.
This commit is contained in:
Andreas Kling 2020-02-08 00:52:33 +01:00
parent a3f39fe789
commit 2b0b7cc5a4
8 changed files with 60 additions and 2 deletions
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7
Kernel/Net/Socket.h
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@ -51,6 +51,9 @@ public:
int type() const { return m_type; }
int protocol() const { return m_protocol; }
bool is_shut_down_for_writing() const { return m_shut_down_for_writing; }
bool is_shut_down_for_reading() const { return m_shut_down_for_reading; }
enum class SetupState {
Unstarted, // we haven't tried to set the socket up yet
InProgress, // we're in the process of setting things up - for TCP maybe we've sent a SYN packet
@ -90,6 +93,8 @@ public:
bool can_accept() const { return !m_pending.is_empty(); }
RefPtr<Socket> accept();
KResult shutdown(int how);
virtual KResult bind(const sockaddr*, socklen_t) = 0;
virtual KResult connect(FileDescription&, const sockaddr*, socklen_t, ShouldBlock) = 0;
virtual KResult listen(int) = 0;
@ -153,6 +158,8 @@ private:
int m_backlog { 0 };
SetupState m_setup_state { SetupState::Unstarted };
bool m_connected { false };
bool m_shut_down_for_reading { false };
bool m_shut_down_for_writing { false };
timeval m_receive_timeout { 0, 0 };
timeval m_send_timeout { 0, 0 };