Commit Graph

356 Commits

Author SHA1 Message Date
Garrett Wollman
ee3c980de5 Some days, it just doesn't pay to get out of bed. Fix another broken
reference to the now-dead-for-real-this-time ia_next field.

Reminded by: Russell Vincent
1996-12-15 22:44:00 +00:00
Garrett Wollman
771f021675 Somehow the removal of ia_next didn't make it in the last time. Hope
it makes it in this time, and remember not to commit changes next time
late on a Friday evening!
1996-12-15 20:46:39 +00:00
Bruce Evans
cbf5d94928 Attempt to complete the fix in the previous revision. This version
fixes the problem reported by max.
1996-12-15 20:38:30 +00:00
John Dyson
97db6f8d69 Missing TAILQ mod. 1996-12-14 17:49:58 +00:00
Garrett Wollman
59562606b9 Convert the interface address and IP interface address structures
to TAILQs.  Fix places which referenced these for no good reason
that I can see (the references remain, but were fixed to compile
again; they are still questionable).
1996-12-13 21:29:07 +00:00
Garrett Wollman
294121822b Use queue macros for the list of interfaces. Next stop: ifaddrs! 1996-12-11 20:38:25 +00:00
Garrett Wollman
4963f4cd96 Include <net/if_arp.h> in the one header that requires it,
<netinet/if_ether.h>, rather than in <net/if.h>, most of whose callers
have no need of it.

Pointed-out-by:	bde
1996-12-11 17:46:33 +00:00
David Greenman
c7a6ccb33e Only pay attention to the offset and the IP_MF flag in ip_off. Pointed
out by Nathaniel D. Daw (daw@panix.com), but fixed differently by me.
1996-12-11 03:26:36 +00:00
Bill Fenner
2f1a0ba831 Allocate a header mbuf for the start of the encapsulated packet.
The rest of the code was treating it as a header mbuf, but it was
allocated as a normal mbuf.

This fixes the panic: ip_output no HDR when you have a multicast
tunnel configured.
1996-11-23 19:07:02 +00:00
Bill Fenner
254de4ea96 Reword two messages:
duplicate ip address 204.162.228.7! sent from ethernet address: 08:00:20:09:7b:1d
changed to
arp: 08:00:20:09:7b:1d is using my IP address 204.162.228.7!

and

arp info overwritten for 204.162.228.2 by 08:00:20:09:7b:1d
changed to
arp: 204.162.228.2 moved from 08:00:20:07:b6:a0 to 08:00:20:09:7b:1d

I think the new wordings are more clear and could save some support
questions.
1996-11-15 18:50:31 +00:00
Bruce Evans
ca5d5e7397 Forward-declare `struct inpcb' so that including this file doesn't cause
lots of warnings.

Should be in 2.2.   Previous version shouldn't have been in 2.2.
1996-11-12 10:02:09 +00:00
Bill Fenner
82c23eba89 Add the IP_RECVIF socket option, which supplies a packet's incoming interface
using a sockaddr_dl.

Fix the other packet-information socket options (SO_TIMESTAMP, IP_RECVDSTADDR)
to work for multicast UDP and raw sockets as well.  (They previously only
worked for unicast UDP).
1996-11-11 04:56:32 +00:00
Bill Fenner
39172c9401 Re-enable the TCP SYN-attack protection code. I was the one who didn't
understand the socket state flag.

2.2 candidate.
1996-11-10 07:37:24 +00:00
Peter Wemm
37bd2b301c Fix braino on my part. When we have three different port ranges (default,
"high" and "secure"), we can't use a single variable to track the most
recently used port in all three ranges.. :-]  This caused the next
transient port to be allocated from the start of the range more often than
it should.
1996-10-30 06:13:10 +00:00
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
Garrett Wollman
64682bc28a Give ip_len and ip_off more natural, unsigned types. 1996-10-23 18:35:50 +00:00
Søren Schmidt
6713d4a747 Changed args to the nat functions. 1996-10-22 22:26:02 +00:00
Alexander Langer
af44ef0a2f Reword two comments. 1996-10-19 20:23:12 +00:00
Bruce Evans
5e26bd9a05 Forward-declared `struct route' for the KERNEL case so that <net/route.h>
isn't a prerequisite.

Fixed style of ifdefs.
1996-10-15 16:54:47 +00:00
Bruce Evans
4458ac71b1 Removed nested include if <sys/socket.h> from <net/if.h> and
<net/if_arp.h> and fixed the things that depended on it.  The nested
include just allowed unportable programs to compile and made my
simple #include checking program report that networking code doesn't
need to include <sys/socket.h>.
1996-10-12 19:49:43 +00:00
Alexander Langer
bfcffdaf03 Log the interface name which received the packet.
Suggested by:	Hal Snyder <hsndyer@thoughtport.com>
1996-10-12 19:38:50 +00:00
Paul Traina
a51764a8bf Fix two bugs I accidently put into the syn code at the last minute
(yes I had tested the hell out of this).

I've also temporarily disabled the code so that it behaves as it previously
did (tail drop's the syns) pending discussion with fenner about some socket
state flags that I don't fully understand.

Submitted by:	fenner
1996-10-11 19:26:42 +00:00
Garrett Wollman
5893891624 All three files: make COMPAT_IPFW==0 case work again.
ip_input.c:
	- delete some dusty code
	- _IP_VHL
	- use fast inline header checksum when possible
1996-10-07 19:21:46 +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
Paul Traina
ebb0cbea75 Increase robustness of FreeBSD against high-rate connection attempt
denial of service attacks.

Reviewed by:	bde,wollman,olah
Inspired by:	vjs@sgi.com
1996-10-07 04:32:42 +00:00
Paul Traina
12eafeb016 I don't understand, I committed this fix (move a counter and fixed a typo)
this evening.

I think I'm going insane.
1996-09-21 06:39:20 +00:00
Andrey A. Chernov
96d719e6e0 Syntax error: so_incom -> so_incomp 1996-09-21 06:30:06 +00:00
Paul Traina
4195b4af58 If the incomplete listen queue for a given socket is full,
drop the oldest entry in the queue.

There was a fair bit of discussion as to whether or not the
proper action is to drop a random entry in the queue.  It's
my conclusion that a random drop is better than a head drop,
however profiling this section of code (done by John Capo)
shows that a head-drop results in a significant performance
increase.

There are scenarios where a random drop is more appropriate.
If I find one in reality, I'll add the random drop code under
a conditional.

Obtained from: discussions and code done by Vernon Schryver (vjs@sgi.com).
1996-09-20 21:25:18 +00:00
Paul Traina
9c4b2574d4 Handle ICMP codes defined in RFC1812 more appropriately 1996-09-20 08:23:54 +00:00
Paul Traina
561c2ad31c Move TCPCTL_KEEPINIT to end of MIB list (sigh) 1996-09-13 23:54:03 +00:00
Paul Traina
7b40aa327d Make the misnamed tcp initial keepalive timer value (which is really the
time, in seconds, that state for non-established TCP sessions stays about)
a sysctl modifyable variable.

[part 1 of two commits, I just realized I can't play with the indices as
 I was typing this commit message.]
1996-09-13 23:51:44 +00:00
Paul Traina
7ff19458de Receipt of two SYN's are sufficient to set the t_timer[TCPT_KEEP]
to "keepidle".  this should not occur unless the connection has
been established via the 3-way handshake which requires an ACK

Submitted by:	jmb
Obtained from:	problem discussed in Stevens vol. 3
1996-09-13 18:47:03 +00:00
Garrett Wollman
f87313106d Set subnetsarelocal to false. In a classless world, the other case
is almost never useful.  (This is only a quick hack; someone should
go back and delete the entire subnetsarelocal==1 code path.)
1996-09-09 20:17:24 +00:00
David Greenman
e7c819442a Dequeue mbuf before freeing it. Fixes mbuf leak and a potential crash when
handling IP fragments.

Submitted by:	Darren Reed <avalon@coombs.anu.edu.au>
1996-09-08 13:45:49 +00:00
Alexander Langer
80afcdeef5 Fix the visibility of the sysctl variables.
Submitted by:	phk
1996-08-31 21:05:20 +00:00
Søren Schmidt
8f52c18724 Oops, send the operation type, not the name to the NAT code... 1996-08-27 20:52:27 +00:00
Poul-Henning Kamp
321a284625 Mark sockets where the kernel chose the port# for.
This can be used by netstat to behave more intelligently.
1996-08-23 18:59:07 +00:00
Søren Schmidt
fed1c7e9e4 Add hooks for an IP NAT module, much like the firewall stuff...
Move the sockopt definitions for the firewall code from
ip_fw.h to in.h where it belongs.
1996-08-21 21:37:07 +00:00
Bill Fenner
e329301e65 Add #define's for RFC1716/RFC1812 new ICMP UNREACHABLE types.
Obtained from:	LBL's tcpdump distribution
1996-08-20 23:11:30 +00:00
Paul Traina
cc98643e68 Completely rewrite handling of protocol field for firewalls, things are
now completely consistent across all IP protocols and should be quite a
bit faster.

Discussed with: fenner & alex
1996-08-13 19:43:41 +00:00
Peter Wemm
bbd42ad0e5 Add two more portrange sysctls, which control the area of the below
IPPORT_RESERVED that is used for selection when bind() is told to allocate
a reserved port.

Also, implement simple sanity checking for all the addresses set, to make
it a little harder for a user/sysadmin to shoot themselves in the feet.
1996-08-12 14:05:54 +00:00
Poul-Henning Kamp
26a8b0bf7e Megacommit to straigthen out ETHER_ mess.
I'm pretty convinced after looking at this that the majority of our
drivers are confused about the in/exclusion of ETHER_CRC_LEN :-(
1996-08-06 21:14:36 +00:00
Alexander Langer
71c011477f Filter by IP protocol.
Submitted by: fenner (with modifications by me)

Use a common prefix string for all warning messages generated during
ip_fw_ctl.
1996-08-05 02:35:04 +00:00
Garrett Wollman
5e2d069649 Eliminate some more references to separate ip_v and ip_hl fields. 1996-07-24 18:46:19 +00:00
Alexander Langer
c616bf2a71 Removed extraneous return. 1996-07-20 00:16:20 +00:00
Alexander Langer
889fe95791 Switch back to logging accepted packets with the text "Allow" instead
of "Accept"
1996-07-14 21:12:52 +00:00
David Greenman
af7a299930 Fixed two bugs in previous commit: be sure to include tcp_debug.h when
TCPDEBUG is defined, and fix typo in TCPDEBUG2() macro.
1996-07-12 17:28:47 +00:00
Bill Fenner
32bd8943f8 Fix braino in rev 1.30 fix; m_copy() the mbuf that has the header
pulled up already.  This bug can cause the first packet from a source
to a group to be corrupted when it is delivered to a process listening
on the mrouter.
1996-07-12 17:22:32 +00:00
Bruce Evans
6ab46d52a5 Don't use NULL in non-pointer contexts. 1996-07-12 04:12:25 +00:00
Garrett Wollman
2c37256e5a Modify the kernel to use the new pr_usrreqs interface rather than the old
pr_usrreq mechanism which was poorly designed and error-prone.  This
commit renames pr_usrreq to pr_ousrreq so that old code which depended on it
would break in an obvious manner.  This commit also implements the new
interface for TCP, although the old function is left as an example
(#ifdef'ed out).  This commit ALSO fixes a longstanding bug in the
TCP timer processing (introduced by davidg on 1995/04/12) which caused
timer processing on a TCB to always stop after a single timer had
expired (because it misinterpreted the return value from tcp_usrreq()
to indicate that the TCB had been deleted).  Finally, some code
related to polling has been deleted from if.c because it is not
relevant t -current and doesn't look at all like my current code.
1996-07-11 16:32:50 +00:00