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Kernel: Handle OOM when allocating IPv4Socket optional scratch buffer

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This commit is contained in:
Brian Gianforcaro 2021-08-01 05:11:05 -07:00 • committed by Andreas Kling
parent a6db2f985a
commit c1a0e379e6
5 changed files with 18 additions and 12 deletions
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11
Kernel/Net/TCPSocket.cpp
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@ -134,8 +134,8 @@ void TCPSocket::release_for_accept(RefPtr<TCPSocket> socket)
[[maybe_unused]] auto rc = queue_connection_from(*socket);
}
TCPSocket::TCPSocket(int protocol, NonnullOwnPtr<DoubleBuffer> receive_buffer)
: IPv4Socket(SOCK_STREAM, protocol, move(receive_buffer))
TCPSocket::TCPSocket(int protocol, NonnullOwnPtr<DoubleBuffer> receive_buffer, OwnPtr<KBuffer> scratch_buffer)
: IPv4Socket(SOCK_STREAM, protocol, move(receive_buffer), move(scratch_buffer))
{
m_last_retransmit_time = kgettimeofday();
}
@ -152,7 +152,12 @@ TCPSocket::~TCPSocket()
KResultOr<NonnullRefPtr<TCPSocket>> TCPSocket::create(int protocol, NonnullOwnPtr<DoubleBuffer> receive_buffer)
{
auto socket = adopt_ref_if_nonnull(new (nothrow) TCPSocket(protocol, move(receive_buffer)));
// Note: Scratch buffer is only used for SOCK_STREAM sockets.
auto scratch_buffer = KBuffer::try_create_with_size(65536);
if (!scratch_buffer)
return ENOMEM;
auto socket = adopt_ref_if_nonnull(new (nothrow) TCPSocket(protocol, move(receive_buffer), move(scratch_buffer)));
if (socket)
return socket.release_nonnull();
return ENOMEM;