Networking & Sockets

socket

// Optional flags for socket type
opt_type_flags = SOCK_NONBLOCK | SOCK_CLOEXEC;

// Create a UNIX socket
socket(
    family = AF_UNIX,
    type = SOCK_STREAM | SOCK_SEQPACKET | <opt_type_flags>,
    protocol = 0
);

// Create an IPv4 socket (TCP or UDP)
socket(
    family = AF_INET, 
    type = SOCK_STREAM | SOCK_DGRAM | <opt_type_flags>,
    protocol = IPPROTO_IP | IPPROTO_TCP | IPPROTO_UDP
);

// Create a netlink socket
socket(
    family = AF_NETLINK, 
    type = SOCK_RAW | SOCK_DGRAM | <opt_type_flags>,
    protocol = NETLINK_ROUTE | NETLINK_KOBJECT_UEVENT
);

// Create a VSOCK socket
socket(
    family = AF_VSOCK, 
    type = SOCK_STREAM | <opt_type_flags>,
    protocol = 0
);

For more information, see the man page.