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Author SHA1 Message Date
Bill Fenner 430d30d837 Don't allow reassembly to create packets bigger than IP_MAXPACKET, and count 
attempts to do so.
Don't allow users to source packets bigger than IP_MAXPACKET.
Make UDP length and ipovly's protocol length unsigned short.

Reviewed by:	wollman
Submitted by:	(partly by) kml@nas.nasa.gov (Kevin Lahey)
 1996-10-25 17:57:53 +00:00
David Greenman 6d6a026b47 Improved in_pcblookuphash() to support wildcarding, and changed relavent 
callers of it to take advantage of this. This reduces new connection
request overhead in the face of a large number of PCBs in the system.
Thanks to David Filo <filo@yahoo.com> for suggesting this and providing
a sample implementation (which wasn't used, but showed that it could be
done).

Reviewed by:	wollman
 1996-10-07 19:06:12 +00:00
Bruce Evans 0453d3cbb3 Changed some memcpy()'s back to bcopy()'s. 
gcc only inlines memcpy()'s whose count is constant and didn't inline
these.  I want memcpy() in the kernel go away so that it's obvious that
it doesn't need to be optimized.  Now it is only used for one struct
copy in si.c.
 1996-06-08 08:19:03 +00:00
Garrett Wollman c611d82e64 Instrument UDP PCB hashing to see how often the hash lookup is effective 
for incoming packets.
 1996-06-05 17:20:35 +00:00
Garrett Wollman 82dab6ce62 Make it possible to return more than one piece of control information 
(PR #1178).
Define a new SO_TIMESTAMP socket option for datagram sockets to return
packet-arrival timestamps  as control information (PR #1179).

Submitted by:	Louis Mamakos <loiue@TransSys.com>
 1996-05-09 20:15:26 +00:00
Bill Fenner df5c0b8a7a Back out my stupid braino; I was thinking strlen and not sizeof. 1996-05-02 05:54:14 +00:00
Bill Fenner af00f8007c Size temp var correctly; buf[4*sizeof "123"] is not long enough 
to store "192.252.119.189\0".
 1996-05-02 05:31:13 +00:00
Andrey A. Chernov 75cfc95fe2 inet_ntoa buffer was evaluated twice in log_in_vain, fix it. 
Thanx to: jdp
 1996-04-27 18:19:12 +00:00
Paul Traina d78a37ad5a Logging UDP and TCP connection attempts should not be enabled by default. 
It's trivial to create a denial of service attack on a box so enabled.

These messages, if enabled at all, must be rate-limited. (!)
 1996-04-09 07:01:53 +00:00
Poul-Henning Kamp 816a3d836e Log TCP syn packets for ports we don't listen on. 
Controlled by: sysctl net.inet.tcp.log_in_vain: 1

Log UDP syn packets for ports we don't listen on.
Controlled by: sysctl net.inet.udp.log_in_vain: 1

Suggested by:	Warren Toomey <wkt@cs.adfa.oz.au>
 1996-04-04 10:46:44 +00:00
David Greenman 2ee45d7d28 Move or add #include <queue.h> in preparation for upcoming struct socket 
changes.
 1996-03-11 15:13:58 +00:00
Bruce Evans b62d102cbb Uniformized pr_ctlinput protosw functions. The third arg is now `void 
*' instead of caddr_t and it isn't optional (it never was).  Most of the
netipx (and netns) pr_ctlinput functions abuse the second arg instead of
using the third arg but fixing this is beyond the scope of this round
of changes.
 1995-12-16 02:14:44 +00:00
Poul-Henning Kamp f708ef1b9e Another mega commit to staticize things. 1995-12-14 09:55:16 +00:00
Bruce Evans 2baeef32b6 Removed unnecessary #includes of vm stuff. Most of them were once 
prerequisites for <sys/sysctl.h>.

subr_prof.c:
Also replaced #include of <sys/user.h> by #include of <sys/resourcevar.h>.
 1995-12-06 23:37:44 +00:00
Bruce Evans ff98689d2d Fixed recent staticizations. Some protypes for static functions were 
left in headers and not staticized.
 1995-11-16 09:51:22 +00:00
Poul-Henning Kamp 0312fbe97d New style sysctl & staticize alot of stuff. 1995-11-14 20:34:56 +00:00
Garrett Wollman 6dfab5b1e1 Merge 4.4-Lite-2: always check the UDP checksum if it is present, even 
if we are not generating checksums.  (Save a test in the input path.)
 1995-09-22 19:56:26 +00:00
Andras Olah 7eb7a449c4 Add a sanity check for the UDP length field in order to prevent 
malformed UDP packets to panic the kernel.
Reviewed by:	davidg, wollman
Obtained from:	dab@berserkly.cray.com (David A. Borman) via end2end list
 1995-08-17 22:09:14 +00:00
Rodney W. Grimes 9b2e535452 Remove trailing whitespace. 1995-05-30 08:16:23 +00:00
David Greenman 94a5d9b6a1 Replaced some bcopy()'s with memcpy()'s so that gcc while inline/optimize. 1995-05-09 13:35:48 +00:00
David Greenman 0d7b7d3ea7 Changed in_pcblookuphash() to not automatically call in_pcblookup() if 
the lookup fails. Updated callers to deal with this. Call in_pcblookuphash
instead of in_pcblookup() in in_pcbconnect; this improves performance of
UDP output by about 17% in the standard case.
 1995-05-03 07:16:53 +00:00
David Greenman 15bd2b4385 Implemented PCB hashing. Includes new functions in_pcbinshash, in_pcbrehash, 
and in_pcblookuphash.
 1995-04-09 01:29:31 +00:00
Bruce Evans b5e8ce9f12 Add and move declarations to fix all of the warnings from `gcc -Wimplicit' 
(except in netccitt, netiso and netns) and most of the warnings from
`gcc -Wnested-externs'.  Fix all the bugs found.  There were no serious
ones.
 1995-03-16 18:17:34 +00:00
Garrett Wollman 1c09f77422 spl back down in unusual out-of-memory condition in udp_output(). 
Obtained from: Stevens, vol. 2, exercise 23.4 (solution p. 1083)
 1995-02-16 01:47:36 +00:00
Garrett Wollman 9bb8795d71 Don't add back in the IP header length to ip_len; icmp_error will do it 
for us.

Obtained from: Stevens, vol. 2, p. 774
 1995-02-16 01:25:06 +00:00
Garrett Wollman f2ea20e676 Add lots of useful MIB variables and a few not-so-useful ones for 
completeness.
 1995-02-16 00:27:47 +00:00
Poul-Henning Kamp 623ae52e4e GCC cleanup. 
Reviewed by:
Submitted by:
Obtained from:
 1994-10-02 17:48:58 +00:00
David Greenman 3c4dd3568f Added $Id$ 1994-08-02 07:55:43 +00:00
Rodney W. Grimes 26f9a76710 The big 4.4BSD Lite to FreeBSD 2.0.0 (Development) patch. 
Reviewed by:	Rodney W. Grimes
Submitted by:	John Dyson and David Greenman
 1994-05-25 09:21:21 +00:00
Rodney W. Grimes df8bae1de4 BSD 4.4 Lite Kernel Sources 1994-05-24 10:09:53 +00:00