direct_connections.md

direct connections

using the raw protocols implementation and the protocol stacks, and leaving aside any fancy tools or features, this project includes practical classes for establishing simple communication connections:

under src/direct_connections/udp:

• udp_client.cpp: udp client that uses udp over ip to send datagrams to a server on a specified port
• udp_server.cpp: udp server that uses udp over ip to listen to datagrams coming from clients into a specified port

under src/direct_connections/icmp, a little uncommon but still useful (e.g. tunneling for masquerade):

• icmp_client.cpp: icmp client that uses icmp over ip to send packets to a server via unregistered icmp type and code (specified in common.h)
• icmp_server.cpp: icmp server that uses icmp over ip to listen to packets coming from clients via the unregistered icmp type

under src/direct_connections/tcp:

• tcp_client.cpp: tcp client that uses tcp over ip to establish a session to a server on a specified port
• tcp_server.cpp: tcp server that uses tcp over ip to accept client's sessions
• and boundary preserving variants of these: tcp_boundary_preserving_client.cpp and tcp_boundary_preserving_server.cpp

under src/direct_connections/emp, using my own protocol:

• emp_client.cpp: emp client that uses emp over ip to send datagrams to a server on a specified endpoint
• emp_server.cpp: emp server that uses emp over ip to listen to data coming from clients into a specified endpoint