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IPv4: Use KBuffer instead of ByteBuffer for socket receive queues

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This drastically reduces the pressure on the kernel heap when receiving
data from IPv4 sockets.
This commit is contained in:
Andreas Kling 2019-08-04 21:07:50 +02:00
parent 609495882f
commit 72798519cb
7 changed files with 18 additions and 19 deletions
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5
Kernel/Net/UDPSocket.cpp
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@ -43,11 +43,10 @@ NonnullRefPtr<UDPSocket> UDPSocket::create(int protocol)
return adopt(*new UDPSocket(protocol));
}
int UDPSocket::protocol_receive(const ByteBuffer& packet_buffer, void* buffer, size_t buffer_size, int flags)
int UDPSocket::protocol_receive(const KBuffer& packet_buffer, void* buffer, size_t buffer_size, int flags)
{
(void)flags;
ASSERT(!packet_buffer.is_null());
auto& ipv4_packet = *(const IPv4Packet*)(packet_buffer.pointer());
auto& ipv4_packet = *(const IPv4Packet*)(packet_buffer.data());
auto& udp_packet = *static_cast<const UDPPacket*>(ipv4_packet.payload());
ASSERT(udp_packet.length() >= sizeof(UDPPacket)); // FIXME: This should be rejected earlier.
ASSERT(buffer_size >= (udp_packet.length() - sizeof(UDPPacket)));