#ifdef __cplusplus
extern "C" {
#endif
...
#ifdef __cplusplus
}
#endif
so that C++ code can include these header files and correctly call the
C-language routines they declare.
painful when upgrading old libpcap to tcpdump.org pcap (function rename
usually requires shlib major number bump, while api addition only require
minor)
./configure --enable-ipv6 (requires getaddrinfo(3) and getnameinfo(3)).
TODO: make it work even without getaddrinfo(3) or getnameinfo(3)
(or, tcpdump/configure.in should provide alternative version by
AC_REPLACE_FUNCS)
TODO: make IPv6 filtering code work by default
TODO: make "protochain" friendly with optimization
guy