Query: ln
OS: osf1
Section: 7
Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar
ln(7) Miscellaneous Information Manual ln(7)NAMEln - Lance Ethernet interfaceSYNOPSISconfig_driver lnDESCRIPTIONThe ln interface provides access to a 10 Mb/s Ethernet network through the Lance controller. The host's Internet address is specified at boot time with an SIOCSIFADDR ioctl. The ln interface employs the address resolution protocol 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 Lance. The SIOCRPHYSADDR ioctl can be used to read the physical address of the Lance. The SIOCADDMULTI and SIOCDELMULTI ioctls can be used to add or delete multicast addresses. The Lance recognizes a maximum of 12 multicast addresses. The SIOCRDCTRS and SIOCRDZCTRS ioctls can be used to read or ``read and clear'' the Ethernet driver counters. The argument to these two ioctls is a pointer to a counter structure, ctrreq, found in <net/if.h>. The SIOCENABLBACK and SIOCDISABLBACK ioctls can be used to enable and disable the interface loopback mode respectively.EXAMPLESTo 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,"ln0"); 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,"ln0"); if (ioctl(s,SIOCENABLEBACK,&data) < 0) { perror("SIOCENABLEBACK:"); exit(1); } close(s); }ERRORSThe diagnostic error messages contain relevant information provided by the Lance. The interface was handed a message with addresses for- matted in an unsuitable address family, and the packet was dropped. A memory parity error has occurred. The ln driver was unable to allo- cate memory for internal data structures. The ln driver was unable to initialize the network interface. Too many multicast requests have been made.RELATED INFORMATIONarp(7), inet(7), netintro(7) delim off ln(7)
Related Man Pages |
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xna(4) - ultrix |
arp(7) - osf1 |
fta(7) - osf1 |
le(7) - osf1 |
ln(7) - osf1 |
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