The following reply was made to PR kern/159099; it has been noted by GNATS.
From: "Alexander V. Chernikov" <melif...@ipfw.ru> To: bug-follo...@freebsd.org, sreeram...@netapp.com Cc: Subject: Re: kern/159099: [ioctl] ioctl SIOCGIFCONF reports interface names which are blank Date: Mon, 25 Jul 2011 08:38:12 +0400 Data returned by SIOCGIFCONF is correct. It just has to be read another way. General struct sockaddr was planned to be enough for holding AF_INET/AF_INET6 address. It is not enough large to hold AF_LINK address (sockaddr_dl), for example. There is also traditional 4.3BSD socket interface with sa_len field contained within struct sockaddr. *BSD, AIX, Darwin, QNX are using it. Linux, Solaris, Cygwin does not. This really leads to portability problems for many people. On all systems supporting sa_len real ifreq length is calculated using sa_len field. sa_len support should be checked before compilation (usually done by autoconf) Please see /usr/src/contrib/traceroute/ifaddrlist.c for example of doing this really portable way. _______________________________________________ freebsd-bugs@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-bugs To unsubscribe, send any mail to "freebsd-bugs-unsubscr...@freebsd.org"
