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Kernel: Handle OOM when allocating Packet KBuffers

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This commit is contained in:
Brian Gianforcaro
2021-08-01 05:11:49 -07:00
committed by Andreas Kling
parent 8c4785bd10
commit 720a686a76
6 changed files with 47 additions and 38 deletions
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8
Kernel/Net/NetworkTask.cpp
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@@ -254,8 +254,8 @@ void handle_icmp(EthernetFrameHeader const& eth, IPv4Packet const& ipv4_packet,
return;
}
adapter->fill_in_ipv4_header(*packet, adapter->ipv4_address(), eth.source(), ipv4_packet.source(), IPv4Protocol::ICMP, icmp_packet_size, 64);
memset(packet->buffer.data() + ipv4_payload_offset, 0, sizeof(ICMPEchoPacket));
auto& response = *(ICMPEchoPacket*)(packet->buffer.data() + ipv4_payload_offset);
memset(packet->buffer->data() + ipv4_payload_offset, 0, sizeof(ICMPEchoPacket));
auto& response = *(ICMPEchoPacket*)(packet->buffer->data() + ipv4_payload_offset);
response.header.set_type(ICMPType::EchoReply);
response.header.set_code(0);
response.identifier = request.identifier;
@@ -264,7 +264,7 @@ void handle_icmp(EthernetFrameHeader const& eth, IPv4Packet const& ipv4_packet,
memcpy(response.payload(), request.payload(), icmp_payload_size);
response.header.set_checksum(internet_checksum(&response, icmp_packet_size));
// FIXME: What is the right TTL value here? Is 64 ok? Should we use the same TTL as the echo request?
adapter->send_packet({ packet->buffer.data(), packet->buffer.size() });
adapter->send_packet(packet->bytes());
adapter->release_packet_buffer(*packet);
}
}
@@ -359,7 +359,7 @@ void send_tcp_rst(IPv4Packet const& ipv4_packet, TCPPacket const& tcp_packet, Re
rst_packet.set_flags(TCPFlags::RST | TCPFlags::ACK);
rst_packet.set_checksum(TCPSocket::compute_tcp_checksum(ipv4_packet.source(), ipv4_packet.destination(), rst_packet, 0));
routing_decision.adapter->send_packet({ packet->buffer.data(), packet->buffer.size() });
routing_decision.adapter->send_packet(packet->bytes());
routing_decision.adapter->release_packet_buffer(*packet);
}