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Kernel: More work on the ICMP and IPv4 support.

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This commit is contained in:
Andreas Kling 2019-03-12 12:43:30 +01:00
parent 9858be636f
commit 87ecf290f4
9 changed files with 63 additions and 53 deletions
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29
Kernel/NetworkAdapter.cpp
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@ -24,19 +24,28 @@ void NetworkAdapter::send(const MACAddress& destination, const ARPPacket& packet
kfree(eth);
}
void NetworkAdapter::send_ipv4(const MACAddress& destination, const void* packet, size_t packet_size)
void NetworkAdapter::send_ipv4(const MACAddress& destination_mac, const IPv4Address& destination_ipv4, IPv4Protocol protocol, ByteBuffer&& payload)
{
size_t size_in_bytes = sizeof(EthernetFrameHeader) + packet_size;
auto* eth = (EthernetFrameHeader*)kmalloc(size_in_bytes);
eth->set_source(mac_address());
eth->set_destination(destination);
eth->set_ether_type(EtherType::IPv4);
memcpy(eth->payload(), packet, packet_size);
send_raw((byte*)eth, size_in_bytes);
kfree(eth);
size_t size_in_bytes = sizeof(EthernetFrameHeader) + sizeof(IPv4Packet) + payload.size();
auto buffer = ByteBuffer::create_zeroed(size_in_bytes);
auto& eth = *(EthernetFrameHeader*)buffer.pointer();
eth.set_source(mac_address());
eth.set_destination(destination_mac);
eth.set_ether_type(EtherType::IPv4);
auto& ipv4 = *(IPv4Packet*)eth.payload();
ipv4.set_version(4);
ipv4.set_internet_header_length(5);
ipv4.set_source(ipv4_address());
ipv4.set_destination(destination_ipv4);
ipv4.set_protocol((byte)protocol);
ipv4.set_length(sizeof(IPv4Packet) + payload.size());
ipv4.set_ident(1);
ipv4.set_ttl(64);
ipv4.set_checksum(ipv4.compute_checksum());
memcpy(ipv4.payload(), payload.pointer(), payload.size());
send_raw((const byte*)&eth, size_in_bytes);
}
void NetworkAdapter::did_receive(const byte* data, int length)
{
InterruptDisabler disabler;