From owner-freebsd-hackers Tue Jul 31 16:20:51 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from EX1.midstream.com (unknown [63.113.127.186]) by hub.freebsd.org (Postfix) with ESMTP id B59EA37B406; Tue, 31 Jul 2001 16:20:48 -0700 (PDT) (envelope-from Jag@midstream.com) Received: by EX1.midstream.com with Internet Mail Service (5.5.2653.19) id ; Tue, 31 Jul 2001 16:20:47 -0700 Message-ID: From: Jag Johal To: "'hackers@freebsd.org'" , Michael VanLoon Cc: "'hackers@freebsd.org'" Subject: RE: Finding MAC address of interface - programming question Date: Tue, 31 Jul 2001 16:20:43 -0700 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain; charset="iso-8859-1" Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Use sysctl(3), basically, its something like this. mib[0] = CTL_NET; mib[1] = AF_ROUTE; mib[2] = 0; mib[3] = AF_INET; mib[4] = NET_RT_IFLIST; mib[5] = 0; sysctl(mib, 6, buf, &len, NULL, 0); buf will contain for each interface, an if_msghdr followed by a sockaddr_dl, the sockaddr_dl will contain the interface name and mac addr. Following that will be a ifa_msghdr for each ip address on the interface. You may want to check out UNPv1. Jag -----Original Message----- From: Chris Faulhaber [mailto:jedgar@fxp.org] Sent: Tuesday, July 31, 2001 3:56 PM To: Michael VanLoon Cc: 'hackers@freebsd.org' Subject: Re: Finding MAC address of interface - programming question On Tue, Jul 31, 2001 at 03:56:40PM -0700, Michael VanLoon wrote: > Please point me to a more appropriate forum if there is one. I'm kinda out > of my depth on this question. Pseudo code is fine. :-) > > What I'm looking for is how to enumerate the network interfaces and get the > Ethernet MAC address of one programmatically. Can anyone point me in the > right direction? > /usr/src/sbin/ifconfig -- Chris D. Faulhaber - jedgar@fxp.org - jedgar@FreeBSD.org -------------------------------------------------------- FreeBSD: The Power To Serve - http://www.FreeBSD.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message