参考文献

Brian Kernighan and Rob Pike, "A practice of programming"
"POSIX Programmer's Guide", O'reilly
RFC2553/3493
draft-cmetz-v6ops-v4mapped-api-harmful-01.txt
draft-itojun-v6ops-v4mapped-harmful-02.txt
萩野純一郎「IPv6ネットワークプログミング」
ftp://ftp.kame.net/pub/kame/misc/
http://www.kame.net/newsletter/19980604/

Richard Stevens, "Unix network programming 2nd ed"
Don't read IPv6 sections, as it is based on older RFC

RFC2292/3542
ping/tracerouteみたいなものを作る場合必要