X-Recipient: archive-cygwin AT delorie DOT com X-SWARE-Spam-Status: No, hits=-1.3 required=5.0 tests=AWL,BAYES_00,FREEMAIL_FROM,SPF_HELO_PASS,T_RP_MATCHES_RCVD,T_TO_NO_BRKTS_FREEMAIL X-Spam-Check-By: sourceware.org To: cygwin AT cygwin DOT com From: Jason Curl Subject: Difference in behaviour between getifaddrs() and ioctl(SIOCGIFCONF) Date: Wed, 01 Dec 2010 22:30:46 +0100 Lines: 54 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.12) Gecko/20101027 Thunderbird/3.1.6 X-IsSubscribed: yes Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner AT cygwin DOT com Mail-Followup-To: cygwin AT cygwin DOT com Delivered-To: mailing list cygwin AT cygwin DOT com Hello, I've seen an issue when using getifaddrs() using Cygwin 1.7.x (snapshot build from 2010-11-24, shortly after the ARP fixes from Corinna). Operating System is Windows 7 x64_86 Ultimate. When I use getifaddrs() I get a list of interface names, some are appended with ":1". Getting the list with ioctl(SIOCGIFCONF) provides a different list of names, where interface names only differ sometimes by ":1". The list from ioctl() is correct, that from getifaddrs() is incorrect, in that the name cannot be used to resolve the HWADDR, SIOCGIFFRNDLYNAM with ioctl(). Using getifaddrs(): device: {4ED54D4E-1024-4BDF-A926-67D2895D2DC4}; ioctl(SIOCGIFFRNDLYNAM)=0 Local Area Connection 4 device: {A045DC0F-A979-49B3-954C-D0678365FF26}:1; ioctl(SIOCGIFFRNDLYNAM)=-1 device: {4EB69B61-C791-434A-8FCE-8F4859EA8DFC}; ioctl(SIOCGIFFRNDLYNAM)=0 Local Area Connection 3 device: {85C2CEC7-A2B9-47D4-9A50-D63E9F9ED007}; ioctl(SIOCGIFFRNDLYNAM)=0 Bluetooth Network Connection device: {56D2E68A-4173-4117-A719-65123B973C65}:1; ioctl(SIOCGIFFRNDLYNAM)=-1 device: {7E5203E8-97DE-4822-9A2E-380BD258D97E}:1; ioctl(SIOCGIFFRNDLYNAM)=-1 device: {8424F604-4FAE-4541-9D8E-7B0A583A0956}:1; ioctl(SIOCGIFFRNDLYNAM)=-1 device: {846EE342-7039-11DE-9D20-806E6F6E6963}:1; ioctl(SIOCGIFFRNDLYNAM)=-1 Using ioctl(SIOCGIFCONF): device: {4ED54D4E-1024-4BDF-A926-67D2895D2DC4}; ioctl(SIOCGIFFRNDLYNAM)=0 Local Area Connection 4 device: {A045DC0F-A979-49B3-954C-D0678365FF26}; ioctl(SIOCGIFFRNDLYNAM)=0 Bluetooth Network Connection 2 device: {4EB69B61-C791-434A-8FCE-8F4859EA8DFC}; ioctl(SIOCGIFFRNDLYNAM)=0 Local Area Connection 3 device: {85C2CEC7-A2B9-47D4-9A50-D63E9F9ED007}; ioctl(SIOCGIFFRNDLYNAM)=0 Bluetooth Network Connection device: {56D2E68A-4173-4117-A719-65123B973C65}; ioctl(SIOCGIFFRNDLYNAM)=0 Local Area Connection device: {7E5203E8-97DE-4822-9A2E-380BD258D97E}; ioctl(SIOCGIFFRNDLYNAM)=0 VMware Network Adapter VMnet1 device: {8424F604-4FAE-4541-9D8E-7B0A583A0956}; ioctl(SIOCGIFFRNDLYNAM)=0 VMware Network Adapter VMnet8 device: {846EE342-7039-11DE-9D20-806E6F6E6963}; ioctl(SIOCGIFFRNDLYNAM)=0 Loopback Pseudo-Interface 1 My control panel shows only interfaces * Bluetooth Network Connection 2 * Local Area Connection * VMware Network Adapter VMnet1 * VMware Network Adapter VMnet8 -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple