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Kernel: Start fleshing out an UDP implementation.

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This commit is contained in:
Andreas Kling 2019-03-13 14:22:27 +01:00
parent 562663df7c
commit b59d588c04
Notes: sideshowbarker 2024-07-19 15:04:24 +09:00
6 changed files with 100 additions and 4 deletions
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22
Kernel/IPv4Socket.cpp
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@ -4,9 +4,12 @@
#include <Kernel/NetworkAdapter.h>
#include <Kernel/IPv4.h>
#include <Kernel/ICMP.h>
#include <Kernel/UDP.h>
#include <Kernel/ARP.h>
#include <LibC/errno_numbers.h>
#define IPV4_SOCKET_DEBUG
Lockable<HashTable<IPv4Socket*>>& IPv4Socket::all_sockets()
{
static Lockable<HashTable<IPv4Socket*>>* s_table;
@ -173,9 +176,22 @@ ssize_t IPv4Socket::recvfrom(void* buffer, size_t buffer_length, int flags, cons
}
ASSERT(!packet_buffer.is_null());
auto& ipv4_packet = *(const IPv4Packet*)(packet_buffer.pointer());
ASSERT(buffer_length >= ipv4_packet.payload_size());
memcpy(buffer, ipv4_packet.payload(), ipv4_packet.payload_size());
return ipv4_packet.payload_size();
if (type() == SOCK_RAW) {
ASSERT(buffer_length >= ipv4_packet.payload_size());
memcpy(buffer, ipv4_packet.payload(), ipv4_packet.payload_size());
return ipv4_packet.payload_size();
}
if (type() == SOCK_DGRAM) {
auto& udp_packet = *static_cast<const UDPPacket*>(ipv4_packet.payload());
ASSERT(udp_packet.length() >= sizeof(UDPPacket)); // FIXME: This should be rejected earlier.
ASSERT(buffer_length >= (udp_packet.length() - sizeof(UDPPacket)));
memcpy(buffer, udp_packet.payload(), udp_packet.length() - sizeof(UDPPacket));
return udp_packet.length() - sizeof(UDPPacket);
}
ASSERT_NOT_REACHED();
}
void IPv4Socket::did_receive(ByteBuffer&& packet)