Commit Graph

21 Commits

Author SHA1 Message Date
thorpej 10c252ba47 Changes to allow the IPv4 and IPv6 layers to align headers themseves,
as necessary:
* Implement a new mbuf utility routine, m_copyup(), is is like
  m_pullup(), except that it always prepends and copies, rather
  than only doing so if the desired length is larger than m->m_len.
  m_copyup() also allows an offset into the destination mbuf, which
  allows space for packet headers, in the forwarding case.
* Add *_HDR_ALIGNED_P() macros for IP, IPv6, ICMP, and IGMP.  These
  macros expand to 1 if __NO_STRICT_ALIGNMENT is defined, so that
  architectures which do not have strict alignment constraints don't
  pay for the test or visit the new align-if-needed path.
* Use the new macros to check if a header needs to be aligned, or to
  assert that it already is, as appropriate.

Note: This code is still somewhat experimental.  However, the new
code path won't be visited if individual device drivers continue
to guarantee that packets are delivered to layer 3 already properly
aligned (which are rules that are already in use).
2002-06-30 22:40:32 +00:00
itojun f192b66b94 whitespace 2002-06-09 16:33:36 +00:00
kml 77c99e8c60 Add in support for timing out IPv4 routes added due to redirects,
as discussed in tech-net several weeks ago.  It turned out that
KAME had already added this functionality to the IPv6 stack, so
I followed their example in adding the sysctl variables
net.inet.icmp.rediraccept and net.inet.icmp.redirtimeout.
2001-10-30 06:41:09 +00:00
itojun 9e8a83c2a4 count successful path MTU changes. good for debugging.
(there could be some discussion on when to increase the counter...)
2000-10-18 19:20:02 +00:00
itojun 63de4c2cb9 nuke the following sysctl variables. "ppsratelimit" should work better.
need to recompile sbin/sysctl after updating /usr/include.
	net.inet.tcp.rstratelimit
	net.inet.icmp.errratelimit
	net.inet6.icmp6.errratelimit
2000-07-28 04:06:52 +00:00
itojun ab492849bc implement net.inet.icmp.errppslimit.
make default value for net.inet.icmp.erratelimit to 0, as < 10ms value
does not do the right thing.
2000-07-10 09:31:29 +00:00
darrenr bae005d1db add icmpreturndatabytes kernel variable (default 8) which specifies the
number of extra data bytes to return in ICMP error messages.  This is
also available via sysctl as net.icmp.returndatabytes and is limited to
[8,512].
2000-06-10 12:39:19 +00:00
thorpej f3b975e9a4 Add ICMP error rate limiting, based on the same for ICMP6.
Note, we're reusing the previously unused slot for "MTU discovery" (which
was moved to the "net.inet.ip" branch of the sysctl tree quite some time
ago).
2000-02-15 04:03:49 +00:00
bouyer f86517a031 Update protocoles and interfaces stats counters to 64bit.
RTM_IFINFO is now 0xf, 0xe is RTM_OIFINFO which returns the old (if_msghdr14)
struct with 32bit counters (binary compat, conditioned on COMPAT_14).
Same for sysctl: node 3 is renamed NET_RT_OIFLIST, NET_RT_IFLIST is now node 4.
Change rt_msg1() to add an mbuf to the mbuf chain instead of just panic()
when the message is larger than MHLEN.
1999-11-19 10:41:41 +00:00
perry f73530ba55 add/cleanup multiple inclusion protection. 1998-02-10 01:26:19 +00:00
kml c8e01708d1 remove extraneous icmp_do_mtudisc 1997-10-18 21:21:28 +00:00
kml 6b86b260cb change sysctl net.inet.icmp.mtudisc to net.inet.ip.mtudisc 1997-10-18 21:18:28 +00:00
kml 323c04642b Path MTU Discovery support. This is turned off by default.
Use sysctl -w net.inet.icmp.mtudisc=1 to turn on.
Still to come:  path removal after some period, black hole detection
1997-10-17 22:12:14 +00:00
jtc 7c04233887 KERNEL -> _KERNEL 1995-03-26 20:23:52 +00:00
cgd cf92afd66e New RCS ID's, take two. they're more aesthecially pleasant, and use 'NetBSD' 1994-06-29 06:29:24 +00:00
mycroft 07b4f2ab54 Update to 4.4-Lite networking code, with a few local changes. 1994-05-13 06:02:48 +00:00
mycroft 627b841797 Change the counters to be all the same type -- u_long. 1994-01-10 23:27:39 +00:00
mycroft 4fe12e6e88 Fix some inconsistent spacing; spaces at the end of lines, etc. 1994-01-08 21:21:28 +00:00
cgd 45a57e79ea more rcsid additions and file header cleanups 1993-05-20 03:49:51 +00:00
mycroft 235bd1db44 Add consistent multiple-inclusion protection. 1993-04-19 03:45:34 +00:00
cgd 61f282557f initial import of 386bsd-0.1 sources 1993-03-21 09:45:37 +00:00