patrick@vicorp.UUCP (Patrick Johnstone) (02/08/90)
I've been slogging through the Unix manuals trying to find a way to get the Ethernet address of my system. I've found a number of ways to get the Internet address, but I'm interested in getting the raw Ethernet address (the one with format %x:%x:%x:%x:%x:%x). I'm working on Sun's (all types) but am wondering if the procedure is the same on all (BSD) Unix systems. If there's anyone that can tell me how this is done, can point me in the right direction, or whatever, please email to me at the address below. I'll post a summary on request. Patrick Johnstone V.I. Corporation Amherst, MA 01002 patrick@vicorp.uu.net ...!vicorp!patrick
chris@mimsy.umd.edu (Chris Torek) (02/08/90)
In article <12763@vicorp.UUCP> patrick@vicorp.UUCP (Patrick Johnstone) writes: >I've been slogging through the Unix manuals trying to find a way to get >the Ethernet address of my system. What makes you think that a system as *an* Ethernet address? We have a number of machines with 2 or more Ethernets, and a few with none (because their underlying network is not Ethernet). >... I'm interested in getting the raw Ethernet address (the one with >format %x:%x:%x:%x:%x:%x). There is no generally-available 4BSD or SunOS ioctl to read an Ethernet address from an interface, but there is a generally-available ioctl to read an ARP address. Hence, if your Ethernet uses ARP to implement Internet address translation, you can bounce a packet off the IP address (forcing an ARP query) and then ask for the ARP entry with SIOCGARP or with /etc/arp. If you have 4.3BSD and run the Xerox NS protocols, the Ethernet address of an interface appears as part of the XNS address. (XNS runs only on Ethernets and things that allow themselves to be addressed as if they were Ethernets.) -- In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 7163) Domain: chris@cs.umd.edu Path: uunet!mimsy!chris
dold@mitisft.Convergent.COM (Clarence Dold) (02/08/90)
in article <12763@vicorp.UUCP>, patrick@vicorp.UUCP (Patrick Johnstone) says: > the Ethernet address of my system. I've found a number of ways to get > the Internet address, but I'm interested in getting the raw Ethernet > address (the one with format %x:%x:%x:%x:%x:%x). I'm working on rlogin to another machine on your net, then do 'arp -a'. -- --- Clarence A Dold - dold@tsmiti.Convergent.COM (408) 435-5293 ...pyramid!ctnews!tsmiti!dold FAX (408) 435-3105 P.O.Box 6685, San Jose, CA 95150-6685 MS#10-007
generous@dev.dtic.dla.mil (Curtis Generous) (02/09/90)
patrick@vicorp.UUCP (Patrick Johnstone) writes: || ... but I'm interested in getting the raw Ethernet ||address (the one with format %x:%x:%x:%x:%x:%x). I'm working on ||Sun's (all types) but am wondering if the procedure is the same on ||all (BSD) Unix systems. ||Patrick Johnstone || patrick@vicorp.uu.net || ...!vicorp!patrick Try looking at the SIOCGARP ioctl request if your machine supports it. --curtis -- Curtis C. Generous Defense Technical Information Center (DTIC) ARPA: generous@dev.dtic.dla.mil UUCP: {uunet,vrdxhq}!dev!generous