xna(7)							 Miscellaneous Information Manual						    xna(7)

NAME

       xna - The DEMNA Ethernet interfaces

SYNOPSIS

       config_driver xna

DESCRIPTION

       The xna driver provides access to a 10-MB Ethernet network through the DEMNA adapter. The DEMNA is an Ethernet-to-XMI adapter.

       The  host's  Internet address is specified at boot time with an SIOCSIFADDR ioctl.  The xna driver employs the Address Resolution Protocol,
       as described in arp(7), to map dynamically between Internet and Ethernet addresses on the local network.

       The SIOCSPHYSADDR ioctl can be used to change the physical address of the adapter and SIOCRPHYSADDR  can  be  used  to  read  its  physical
       address.   SIOCADDMULTI	and SIOCDELMULTI can be used to add or delete multicast addresses.  The xna driver supports a maximum of 12 multi-
       cast addresses. The argument to the latter ioctls is a pointer to an ``ifreq'' structure found in <net/if.h>.

       SIOCRDCTRS and SIOCRDZCTRS ioctls can be used to read or read and clear network counters. The argument  to  the	latter	two  ioctls  is  a
       pointer to a counter structure ``ctrreq'' found in <net/if.h>.

       The ioctls SIOCENABLBACK and SIOCDISABLBACK can be used to enable and disable the interface loopback mode.

RESTRICTIONS

       The PUP protocol family is not supported.

EXAMPLES

       To  obtain  the	physical  address  of  the  adapter,  use  the SIOCRPHYSADDR ioctl as in the following program example: #include <stdio.h>
       /* standard I/O */ #include <errno.h>		  /* error numbers */ #include <sys/socket.h>	      /* socket  definitions  */  #include
       <sys/ioctl.h>	      /* ioctls */ #include <net/if.h>		   /* generic interface structures */

       main() {
	 int s,i;
	 static   struct  ifdevea  devea;
	 /* Get a socket */
	 s = socket(AF_INET,SOCK_DGRAM,0);
	 if (s < 0) {
	    perror("socket");
	    exit(1);
	 }
	 strcpy(devea.ifr_name,"xna0");
	 if (ioctl(s,SIOCRPHYSADDR,&devea) < 0) {
	    perror(&devea.ifr_name[0]);
	    exit(1);
	 }
	 printf("Address is ");
	 for (i = 0; i < 6; i++)
	    printf("%X ", devea.default_pa[i] & 0xff);
	 printf("
");
	 close(s); }

       To  enable external loopback, use the SIOCENABLEBACK ioctl as in the following program example: #include <stdio.h>	       /* standard
       I/O */ #include <errno.h>	      /* error numbers */ #include <sys/socket.h>	  /* socket definitions */ #include  <sys/ioctl.h>
       /* ioctls */ #include <net/if.h> 	    /* generic interface structures */

       main() {
	 int s;
	 struct  ifreq	data;
	 /* Get a socket */
	 s = socket(AF_INET,SOCK_DGRAM,0);
	 if (s < 0) {
	    perror("socket");
	    exit(1);
	 }
	 strcpy(data.ifr_name,"xna0");
	 if (ioctl(s,SIOCENABLEBACK,&data) < 0) {
	    perror("SIOCENABLEBACK:");
	    exit(1);
	 }
	 close(s); }

ERRORS

       The  DEMNA  errors  are	coded  as  follows: Adapter did not pass the power-up self-test during autoconfiguration time. The port attachment
       fails.  The xna driver was unable to allocate memory for adapter data structures.  The port attachment fails.  The xna driver was unable to
       map  memory  for  adapter  data structures. The port attachment fails.  The xna driver was unable to bring the adapter into the initialized
       state. The port attachment fails.  The xna driver failed to prepare the adapter for run-time use.  The xna driver was unable to	bring  the
       adapter	into  the  initialized	state during a port reset.  The adapter port command failed. The error code gives reason for failure.  Too
       many multicast requests have been made.

RELATED INFORMATION

       Files: arp(7), inet(7), intro(4), netstat(1) delim off

																	    xna(7)