IPF中with opt问题

hbird390

# Block frags
block in quick on dc0 all with frags

# Block short tcp packets
block in quick on dc0 proto tcp all with short

# block source routed packets
block in quick on dc0 all with opt lsrr
block in quick on dc0 all with opt ssrr

以上是IPF手册中的例子，但我在IPF HowTo找不到有关 With/With opt的相关说明，请问这是什么意思？哪有详细的说明。谢谢

colddawn

原帖由 hbird390 于 2007-2-6 12:32 发表
# Block frags
block in quick on dc0 all with frags

# Block short tcp packets
block in quick on dc0 proto tcp all with short

# block source routed packets
block in quick on dc0 all with opt ...

似乎是IP Option，这个估计需要查协议栈的RFC才能知道了，下面是google来的结果：
loose source and record route (LSRR)
strict source and record route (SSRR)
除此之外的option应该还有：
security
record route
internet timestamp

hbird390

谢谢。我奇怪的是为什么IPF的说明文档没有相关的说明？那仙人是怎么知道用到with opt xxxx的。看过IPF的源代码？