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#include <Kernel/Net/IPv4Socket.h>
#include <Kernel/Net/TCPSocket.h>
#include <Kernel/Net/UDPSocket.h>
#include <Kernel/UnixTypes.h>
#include <Kernel/Process.h>
#include <Kernel/Net/NetworkAdapter.h>
#include <Kernel/Net/IPv4.h>
#include <Kernel/Net/ICMP.h>
#include <Kernel/Net/TCP.h>
#include <Kernel/Net/UDP.h>
#include <Kernel/Net/ARP.h>
#include <Kernel/Net/Routing.h>
#include <LibC/errno_numbers.h>
#define IPV4_SOCKET_DEBUG
Lockable<HashTable<IPv4Socket*>>& IPv4Socket::all_sockets()
{
static Lockable<HashTable<IPv4Socket*>>* s_table;
if (!s_table)
s_table = new Lockable<HashTable<IPv4Socket*>>;
return *s_table;
}
Retained<IPv4Socket> IPv4Socket::create(int type, int protocol)
{
if (type == SOCK_STREAM)
return TCPSocket::create(protocol);
if (type == SOCK_DGRAM)
return UDPSocket::create(protocol);
return adopt(*new IPv4Socket(type, protocol));
}
IPv4Socket::IPv4Socket(int type, int protocol)
: Socket(AF_INET, type, protocol)
{
kprintf("%s(%u) IPv4Socket{%p} created with type=%u, protocol=%d\n", current->process().name().characters(), current->pid(), this, type, protocol);
LOCKER(all_sockets().lock());
all_sockets().resource().set(this);
}
IPv4Socket::~IPv4Socket()
{
LOCKER(all_sockets().lock());
all_sockets().resource().remove(this);
}
bool IPv4Socket::get_address(sockaddr* address, socklen_t* address_size)
{
// FIXME: Look into what fallback behavior we should have here.
if (*address_size != sizeof(sockaddr_in))
return false;
memcpy(address, &m_destination_address, sizeof(sockaddr_in));
*address_size = sizeof(sockaddr_in);
return true;
}
KResult IPv4Socket::bind(const sockaddr* address, socklen_t address_size)
{
ASSERT(!is_connected());
if (address_size != sizeof(sockaddr_in))
return KResult(-EINVAL);
if (address->sa_family != AF_INET)
return KResult(-EINVAL);
ASSERT_NOT_REACHED();
}
KResult IPv4Socket::connect(const sockaddr* address, socklen_t address_size)
{
ASSERT(!m_bound);
if (address_size != sizeof(sockaddr_in))
return KResult(-EINVAL);
if (address->sa_family != AF_INET)
return KResult(-EINVAL);
auto& ia = *(const sockaddr_in*)address;
m_destination_address = IPv4Address((const byte*)&ia.sin_addr.s_addr);
m_destination_port = ntohs(ia.sin_port);
return protocol_connect();
}
void IPv4Socket::attach_fd(SocketRole)
{
++m_attached_fds;
}
void IPv4Socket::detach_fd(SocketRole)
{
--m_attached_fds;
}
bool IPv4Socket::can_read(SocketRole) const
{
if (protocol_is_disconnected())
return true;
return m_can_read;
}
ssize_t IPv4Socket::read(SocketRole, byte* buffer, ssize_t size)
{
return recvfrom(buffer, size, 0, nullptr, 0);
}
ssize_t IPv4Socket::write(SocketRole, const byte* data, ssize_t size)
{
return sendto(data, size, 0, nullptr, 0);
}
bool IPv4Socket::can_write(SocketRole) const
{
return true;
}
int IPv4Socket::allocate_source_port_if_needed()
{
if (m_source_port)
return m_source_port;
int port = protocol_allocate_source_port();
if (port < 0)
return port;
m_source_port = (word)port;
return port;
}
ssize_t IPv4Socket::sendto(const void* data, size_t data_length, int flags, const sockaddr* addr, socklen_t addr_length)
{
(void)flags;
if (addr && addr_length != sizeof(sockaddr_in))
return -EINVAL;
if (addr) {
if (addr->sa_family != AF_INET) {
kprintf("sendto: Bad address family: %u is not AF_INET!\n", addr->sa_family);
return -EAFNOSUPPORT;
}
auto& ia = *(const sockaddr_in*)addr;
m_destination_address = IPv4Address((const byte*)&ia.sin_addr.s_addr);
m_destination_port = ntohs(ia.sin_port);
}
auto* adapter = adapter_for_route_to(m_destination_address);
if (!adapter)
return -EHOSTUNREACH;
int rc = allocate_source_port_if_needed();
if (rc < 0)
return rc;
kprintf("sendto: destination=%s:%u\n", m_destination_address.to_string().characters(), m_destination_port);
if (type() == SOCK_RAW) {
adapter->send_ipv4(MACAddress(), m_destination_address, (IPv4Protocol)protocol(), ByteBuffer::copy(data, data_length));
return data_length;
}
return protocol_send(data, data_length);
}
ssize_t IPv4Socket::recvfrom(void* buffer, size_t buffer_length, int flags, sockaddr* addr, socklen_t* addr_length)
{
(void)flags;
if (addr_length && *addr_length < sizeof(sockaddr_in))
return -EINVAL;
#ifdef IPV4_SOCKET_DEBUG
kprintf("recvfrom: type=%d, source_port=%u\n", type(), source_port());
#endif
ByteBuffer packet_buffer;
{
LOCKER(lock());
if (!m_receive_queue.is_empty()) {
packet_buffer = m_receive_queue.take_first();
m_can_read = !m_receive_queue.is_empty();
#ifdef IPV4_SOCKET_DEBUG
kprintf("IPv4Socket(%p): recvfrom without blocking %d bytes, packets in queue: %d\n", this, packet_buffer.size(), m_receive_queue.size_slow());
#endif
}
}
if (packet_buffer.is_null()) {
if (protocol_is_disconnected()) {
kprintf("IPv4Socket{%p} is protocol-disconnected, returning 0 in recvfrom!\n", this);
return 0;
}
current->set_blocked_socket(this);
load_receive_deadline();
current->block(Thread::BlockedReceive);
LOCKER(lock());
if (!m_can_read) {
// Unblocked due to timeout.
return -EAGAIN;
}
ASSERT(m_can_read);
ASSERT(!m_receive_queue.is_empty());
packet_buffer = m_receive_queue.take_first();
m_can_read = !m_receive_queue.is_empty();
#ifdef IPV4_SOCKET_DEBUG
kprintf("IPv4Socket(%p): recvfrom with blocking %d bytes, packets in queue: %d\n", this, packet_buffer.size(), m_receive_queue.size_slow());
#endif
}
ASSERT(!packet_buffer.is_null());
auto& ipv4_packet = *(const IPv4Packet*)(packet_buffer.pointer());
if (addr) {
auto& ia = *(sockaddr_in*)addr;
memcpy(&ia.sin_addr, &m_destination_address, sizeof(IPv4Address));
ia.sin_family = AF_INET;
ASSERT(addr_length);
*addr_length = sizeof(sockaddr_in);
}
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();
}
return protocol_receive(packet_buffer, buffer, buffer_length, flags, addr, addr_length);
}
void IPv4Socket::did_receive(ByteBuffer&& packet)
{
LOCKER(lock());
auto packet_size = packet.size();
m_receive_queue.append(move(packet));
m_can_read = true;
m_bytes_received += packet_size;
#ifdef IPV4_SOCKET_DEBUG
kprintf("IPv4Socket(%p): did_receive %d bytes, total_received=%u, packets in queue: %d\n", this, packet_size, m_bytes_received, m_receive_queue.size_slow());
#endif
}
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