inspiring morning

[changtimwu]

• https://github.com/vincentbernat/wiremaps seems a better way than proprietary broadcast based device discovery. Discover topology via FDB oid is an excellent idea.
• http://netdisco2-demo.herokuapp.com/ another similar project
• https://github.com/vincentbernat/lldpd study this for cross platform(linux/OSX) raw socket. The author writes an excellent implementation notes.
• libevent2 and nice introduction in Chinese.

[changtimwu]

• http://vincent.bernat.im/en/blog/2013-lldpd-0.7.1.html#c99 variable can be initialized from another variable.
• libevent worthes to read.

[changtimwu]

• In Linux, it still uses PF_PACKET https://github.com/vincentbernat/lldpd/blob/master/src/daemon/priv-linux.c#L270
• surprisingly, it can attach BPF filter on a PF_PACKET handler https://github.com/vincentbernat/lldpd/blob/master/src/daemon/lldpd.h#L277 https://github.com/vincentbernat/lldpd/blob/master/src/daemon/priv-linux.c#L190

[changtimwu]

on BSD https://github.com/vincentbernat/lldpd/blob/master/src/daemon/priv-bsd.c