llcloop(ADMP)                   19 June 1992                   llcloop(ADMP)


 Name

    llcloop - software loopback network interface

 Syntax

    Programmer's interface:
    #include  <sys/socket.h>
    #include  <netinet/in.h>
    struct sockaddrin sin;

    s = socket(AFINET, SOCK, 0);
    .
    .
    .
    sin.sinaddr.saddr = htonl(INADDRANY);
    bind(s, (char *)&sin, sizeof(sin));


 Description

    The llcloop interface is a software loopback mechanism which may be used
    for performance analysis, software testing, and/or local communication.
    As with other network interfaces, the loopback interface must have
    network addresses assigned for each address family with which it is to be
    used.  (Currently, only the Internet address family is supported.)  These
    addresses may be set or changed with the SIOCSIFADDR ioctl.  The loopback
    interface should be the first interface configured, otherwise nameserver
    lookups for hostnames of other interfaces may fail.

 Files

    /dev/llcloop

 See also

    inet(ADMP), Intro(ADMP)