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Re: divert_packet and ifnet_hdrlen

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Re: divert_packet and ifnet_hdrlen

Subject: Re: divert_packet and ifnet_hdrlen
From: Josh Graessley <email@hidden>
Date: Wed, 4 May 2005 11:25:37 -0700

ifnet_hdrlen is set by the interface. In some cases, the interface may have a variable length header such as PPP. Ethernet also has an issue where some protocols, such as AppleTalk, use 802.3 which extends the header by another 8 bytes.

-josh

On May 4, 2005, at 7:28 AM, Stephane Sudre wrote:

Can the value returned by ifnet_hdrlen for the interface for the iff_output callback of a kpi interface filter be wrong in some cases?
The case I'm thinking about is this kind of backtrace:
dlil_output
ip_output_list
divert_packet
sosend
socketpair
sendto
unix_syscall
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References:  
  >divert_packet and ifnet_hdrlen (From: Stephane Sudre <email@hidden>)




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