Protocols

The io-sock networking stack provides Internet protocols ported from FreeBSD.

• ICMP (Internet Control Message Protocol) — the error and control message protocol used by IP and the Internet protocol family (go to https://man.freebsd.org/cgi/man.cgi?query=icmp&sektion=4&manpath=FreeBSD+13.3-RELEASE+and+Ports)
• ICMP6 (Internet Control Message Protocol for IP6) — the error and control message protocol used by IPv6 and the IPv6 protocol family (go to https://man.freebsd.org/cgi/man.cgi?query=icmp6&sektion=4&manpath=FreeBSD+13.3-RELEASE+and+Ports)
• IPsec (Internet Protocol security protocol) — security protocol implemented within the Internet Protocol layer of the networking stack (go to https://man.freebsd.org/cgi/man.cgi?query=ipsec&sektion=4&manpath=FreeBSD+13.3-RELEASE+and+Ports)
• IPv4 (Internet Protocol version 4) — used by the IPv4 protocol family for transporting data (go to https://man.freebsd.org/cgi/man.cgi?query=ip&sektion=4&manpath=FreeBSD+13.3-RELEASE+and+Ports)
• IPv6 (Internet Protocol version 6 network layer) — used by the IPv6 protocol family for transporting data (go to https://man.freebsd.org/cgi/man.cgi?query=ip6&sektion=4&manpath=FreeBSD+13.3-RELEASE+and+Ports)
• ROUTE (System packet forwarding database) — used to select the appropriate network interface when transmitting packets (go to https://man.freebsd.org/cgi/man.cgi?query=route&sektion=4&manpath=FreeBSD+13.3-RELEASE+and+Ports)
• SCTP (Internet Stream Control Transmission Protocol) — provides reliable, flow-controlled, two-way transmission of data (go to https://man.freebsd.org/cgi/man.cgi?query=sctp&sektion=4&manpath=FreeBSD+13.3-RELEASE+and+Ports)
• TCP (Internet Transmission Control Protocol) — provides reliable, flow-controlled, two-way transmission of data (go to https://man.freebsd.org/cgi/man.cgi?query=tcp&sektion=4&manpath=FreeBSD+13.3-RELEASE+and+Ports)
• UDP (Internet User Datagram Protocol) — simple, unreliable datagram protocol that is used to support the SOCK_DGRAM abstraction for the Internet protocol family (go to https://man.freebsd.org/cgi/man.cgi?query=udp&sektion=4&manpath=FreeBSD+13.3-RELEASE+and+Ports)
• Unix (UNIX-domain protocol family) — a collection of protocols that provides local (on-machine) interprocess communication through the normal socket() mechanisms (go to https://man.freebsd.org/cgi/man.cgi?query=unix&sektion=4&manpath=FreeBSD+13.3-RELEASE+and+Ports)