Date: Mon, 25 Jun 2007 14:50:08 +0800 From: blue <susan.lan@zyxel.com.tw> To: freebsd-net@freebsd.org Subject: Questions about PF_KEY interface Message-ID: <467F65A0.9010900@zyxel.com.tw>
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Dear all: I found there are two directories about PF_KEY interface: netkey and netipsec under $FreeBSD src$\sys\. Looking into the makefile, the one that is currently used and built in is netkey. However, I am wondering what's the purpose for netipsec? Besides, the handling for the global variable "regtree", which is used for key registery, in netipsec seems more proper to me. For example, when a key is needed to register, the static function, key_register(), which is defined in [netkey/netipsec]/key.c, will be called. However, in netkey/key.c, key_register() will not call mtx_lock before the operation of the global variable, regtree. On the other hand, in netipsec/key.c, key_register() will mtx_lock. In my opinion, I think the latter should be correct since there may be various processes to call the function. Without the protection, race condition will occur! Many thanks. bluehome | help
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