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NetBSD uses a fixed 64-bit padding, unlike OS X (32-bit), and unlike other platforms (sizeof(unsigned long)). There is an RT_ROUNDUP macro that does the right alignment; use that when available. http://ftp.netbsd.org/pub/NetBSD/NetBSD-current/src/lib/libc/net/getifaddrs.c http://fxr.watson.org/fxr/source/net/route.h?v=NETBSD#L270 Rounding to 4 bytes was breaking with IPv6 addresses, which are 28 bytes. The pointer was being advanced by 28 instead of 32. Compare to r29739, somewhat similar. Reported by Fredrik Pettai. http://seclists.org/nmap-dev/2013/q1/384
libdnet ------- libdnet provides a simplified, portable interface to several low-level networking routines, including network address manipulation, kernel arp(4) cache and route(4) table lookup and manipulation, network firewalling, network interface lookup and manipulation, IP tunnelling, and raw IP packet and Ethernet frame transmission. WWW: http://libdnet.sourceforge.net/ $Id: README 578 2005-02-14 21:00:17Z dugsong $