CVS commit: src/sys/netinet

[Jonathan Stone <jonathan%netbsd.org@localhost>]

Module Name:    src
Committed By:   jonathan
Date:           Mon Nov 17 22:34:16 UTC 2003

Modified Files:
        src/sys/netinet: ip_input.c

Log Message:
Diff to netinet/ip_input.c (restore ip_id, initialize) for ip_id fix:

Revert the (default) ip_id algorithm to the pre-randomid algorithm,
due to demonstrated low-period repeated IDs from the randomized IP_id
code.  Consensus is that the low-period repetition (much less than
2^15) is not suitable for general-purpose use.

Allocators of new IPv4 IDs should now call the function ip_newid().
Randomized IP_ids is now a config-time option, "options RANDOM_IP_ID".
ip_newid() can use ip_random-id()_IP_ID if and only if configured
with RANDOM_IP_ID. A sysctl knob should be  provided.

This API may be reworked in the near future to support linear ip_id
counters per (src,dst) IP-address pair.


To generate a diff of this commit:
cvs rdiff -r1.182 -r1.183 src/sys/netinet/ip_input.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.