upper layers: you use the store_header() function to mark the header you want
to preserve. All subsequent remove_header() calls won't claim the actual
data, but only move the node start around.
* This header can then be restored by restore_header(). However, a call to
prepend_data() will destroy the stored header. Also, if remove_header() cuts
off a whole node, restoring the header won't succeed anymore.
* Discarded the no longer needed net_buffer::network_header field.
* Also discarded the hoplimit field which temporarily breaks the IPv6 build
until Atis reworks it.
* IPv4 now also dumps the IP header in the send path if debug output is enabled.
* icmp_error_reply() might be called so early that the net_buffer's addresses
do not point to the reply address; this is now detected, and the addresses are
taken out of the IP header in that case.
* Improved dumping the net_buffer to also include its address, and flags.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37688 a95241bf-73f2-0310-859d-f6bbb57e9c96
74a4c33fda