RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-05-31 09:48:11 +00:00
Code Issues Activity Actions

IPv4: Last burst of TCP hacking for today.

Browse source 
Connecting to a test server and exchanging data back and forth works.
This commit is contained in:
Andreas Kling 2019-03-14 01:42:29 +01:00
parent be46f1bb1f
commit 3d5296a901
3 changed files with 27 additions and 15 deletions
Download patch file Download diff file Expand all files Collapse all files

14
Kernel/IPv4Socket.cpp
View file

@ -245,11 +245,16 @@ void IPv4Socket::send_tcp_packet(NetworkAdapter& adapter, word flags, const void
memcpy(tcp_packet.payload(), payload, payload_size);
tcp_packet.set_checksum(compute_tcp_checksum(adapter.ipv4_address(), m_destination_address, tcp_packet, payload_size));
kprintf("sending tcp packet from %s:%u to %s:%u!\n",
kprintf("sending tcp packet from %s:%u to %s:%u with (%s %s) seq_no=%u, ack_no=%u\n",
adapter.ipv4_address().to_string().characters(),
source_port(),
m_destination_address.to_string().characters(),
m_destination_port);
m_destination_port,
tcp_packet.has_syn() ? "SYN" : "",
tcp_packet.has_ack() ? "ACK" : "",
tcp_packet.sequence_number(),
tcp_packet.ack_number()
);
adapter.send_ipv4(MACAddress(), m_destination_address, IPv4Protocol::TCP, move(buffer));
}
@ -302,7 +307,7 @@ ssize_t IPv4Socket::sendto(const void* data, size_t data_length, int flags, cons
}
if (type() == SOCK_STREAM) {
send_tcp_packet(*adapter, 0, data, data_length);
send_tcp_packet(*adapter, TCPFlags::PUSH | TCPFlags::ACK, data, data_length);
return data_length;
}
@ -374,7 +379,7 @@ ssize_t IPv4Socket::recvfrom(void* buffer, size_t buffer_length, int flags, sock
if (type() == SOCK_STREAM) {
auto& tcp_packet = *static_cast<const TCPPacket*>(ipv4_packet.payload());
size_t payload_size = packet_buffer.size() - tcp_packet.header_size();
size_t payload_size = packet_buffer.size() - sizeof(IPv4Packet) - tcp_packet.header_size();
ASSERT(buffer_length >= payload_size);
if (addr) {
auto& ia = *(sockaddr_in*)addr;
@ -395,5 +400,4 @@ void IPv4Socket::did_receive(ByteBuffer&& packet)
#ifdef IPV4_SOCKET_DEBUG
kprintf("IPv4Socket(%p): did_receive %d bytes, packets in queue: %d\n", this, packet.size(), m_receive_queue.size_slow());
#endif
}