Commit Graph

524 Commits

Author SHA1 Message Date
matt 25054b5cf7 Adapt the NEWRENO changes from the UCSB diffs of BSDI 3.0's TCP
to NetBSD.  Ignore the SACK & FACK stuff for now.
1998-10-04 21:33:52 +00:00
kleink c68106edad Use #error instead of causing a parse error. 1998-10-02 21:21:04 +00:00
drochner 5ddf423985 print reason for arplookup() failure (ala FreeBSD) 1998-10-01 11:04:24 +00:00
tls c4730d65cf Switch order of TNF and UCB copyrights so UCB copyright is first; this seems more appropriate since UCB wrote the original code, after all. 1998-09-30 21:52:24 +00:00
hwr eaccb9cd8d Start supporting IPPROTO_MOBILE (55) encapsulation. This is yet
another tunneling protocol used by the Mobile-IP people. See RFC 2004
for this.
1998-09-30 05:59:27 +00:00
christos e74ca32804 SIOCGIFALIAS should not be restricted to the superuser. 1998-09-28 12:32:43 +00:00
mycroft 4a000a54e6 Fix a typo (not mine) in a comment. 1998-09-19 04:34:34 +00:00
mycroft 04ef3bf88d If we're in LISTEN state and all of RST, SYN and ACK are clear, send a RST. 1998-09-19 04:32:51 +00:00
mycroft 31347e4671 Always send a 0 window with a RST. Suggested by Darren Reed. 1998-09-19 04:02:52 +00:00
hwr cf70cc28c7 Typo. :( 1998-09-14 21:15:56 +00:00
hwr 517139017e Some additions.
And IDPR-CMTP is 38 not 39 according to IANA.
1998-09-14 21:09:51 +00:00
hwr 366b9c4515 Add a gre tunnel pseudo network device. Gre = generic route encapsulation.
This device shows up like any other network interface and can be used to
tunnel L3 protocols as e.g. IP over IP.
1998-09-13 20:27:47 +00:00
christos 66dd35d72c Fix copyright spacing and 'Van' -> 'van' for consistency. 1998-09-13 15:45:40 +00:00
tv 235fc6a6a9 egcs {brace} warning fix 1998-09-10 19:53:28 +00:00
mouse b95116821c Create tcp.keepidle, tcp.keepintvl, tcp.keepcnt, tcp.slowhz sysctls. 1998-09-10 10:46:03 +00:00
thorpej 9fd57e8917 Make a diagnostic printf more sensible, PR #5951, Heiko W. Rupp. 1998-09-09 04:57:18 +00:00
thorpej 4dbfe05f1f Use an algorithm similar to that in tcp_notify() to determine if
syn_cache_unreach() should remove the entry, or just continue on.

Algorithm is to only remove the entry if we've had more than one unreach
error and have retransmitted 3 or more times.  This prevents the following
scenario, as noted in PR #5909 (PR from Ty Sarna, scenario from
Charles Hannum):

	* Host A sends a SYN.
	* Host A retransmits the SYN.
	* Host B gets the first SYN and sends a SYN-ACK.
	* Host B gets the second SYN and sends a SYN-ACK.
	* One of the SYN-ACK bounces with an
	  ICMP unreachable, causing the `SYN cache' entry to be
	  removed with no notification.
	* Host A receives the other SYN-ACK, sends an ACK, and goes to
	  ESTABLISHED state.

Should fix PR #5909.
1998-09-09 01:32:27 +00:00
christos 0f024deb52 Add SIOCGIFALIAS 1998-09-06 17:52:01 +00:00
kleink bb4f7768e4 Protect _XOPEN_SOURCE against sysctl MIB identifiers. 1998-09-05 19:03:25 +00:00
mycroft e2cb6dad8d Make the randomized part of the ISS 24 bits. 1998-09-04 22:34:51 +00:00
mycroft 2f501074f8 Fix a couple of bogons related to tcp_new_iss():
* Don't add tcp_iss_seq when creating a new ISS from TIME-WAIT state.
* Do the clock increment even when using the rnd device.
1998-09-04 22:29:54 +00:00
scottr e3e7e1673f Fix the NEXT_IA_WITH_SAME_ADDR macro introduced in 1.27: it was finding
the first in_ifaddr structure with a different internet address!  Reverse
the sense of the test.  Spotted by and fix from Eric Haszlakiewicz.
1998-08-14 06:57:54 +00:00
mrg 4a75265273 defopt PFIL_HOOKS. 1998-08-09 08:58:18 +00:00
thorpej 833061914a Use the pool allocator for tcpcbs. 1998-08-02 00:36:19 +00:00
thorpej d319e4b419 Use the pool allocator for syn_cache entries. 1998-08-02 00:35:51 +00:00
thorpej 47e9dcf841 Use the pool allocator for inpcbs. 1998-08-02 00:35:31 +00:00
tls 31d0752b99 change IN_IFADDR_HASH_SIZE to 509, which actually uses no more space than 293 due to rounding up to nearest power of two in hashinit. 1998-07-29 05:18:54 +00:00
pk 84840da908 in_pcballoc(): we can't afford to wait for memory. 1998-07-23 08:24:33 +00:00
mycroft cca4e566a9 Implement a better fix for the `gratuitous FIN' problem, as
mentioned on tcp-impl but with a bit more commentary.
1998-07-21 10:46:00 +00:00
thorpej 3a9ed00799 Document that we are more conservative after doing MTU discovery than the
suggestion in draft-floyd-incr-init-win-03.  Rather than scaling cwnd back
by the ratio of new segment size to old segment size, we perform a slow start
using the Initial Window, computed with the new segment size.
1998-07-17 23:09:58 +00:00
thorpej 0f909866c0 Clarify that we're using the Loss Window when we receive a source quench. 1998-07-17 23:02:38 +00:00
thorpej fa20f24cd9 Add a comment wrt. a current issue w/ CWM. 1998-07-17 23:00:02 +00:00
thorpej a3f4316cba Clarify that we are using the Loss Window if a retransmission occurred
during the three-way handshake.
1998-07-17 22:58:56 +00:00
thorpej 830879a809 Comment where the Restart Window is computed, and in the non-CWM case,
make sure it never _increases_ cwnd.
1998-07-17 22:52:01 +00:00
thorpej 1c4ff0a086 Comment where we use the Loss Window. 1998-07-17 22:18:49 +00:00
sommerfe 69b1b4758d Fix PR5559: if fast-forwarding, DF set, and packet too large, send ICMP error.. 1998-07-17 00:35:23 +00:00
sommerfe 534520d815 Fix PR5508: ipfil cut-through forwarding causes panic 1998-07-17 00:28:00 +00:00
tls deac3540de Put original hash function back. It wastes a little bit of space, but is much more even -- think of the case of a web service provider, some of whose customers end up getting 'inferior service' because they're on addresses that happen to be out at the end of a hash chain. With webservers with thousands of addresses, this is a real issue. If the wasted space is a big deal, we could pick a prime number that's slightly _less_ than a power of two... 1998-07-16 06:45:09 +00:00
thorpej 389da54091 Garbage collect `imp' and `hy'. We don't have the rest of the code, and
it's not like anyone is ever going to be using either of them.
1998-07-15 17:39:20 +00:00
veego 97ab1bd53b Resolve conflicts from the import. 1998-07-12 15:23:59 +00:00
mycroft 3a64270ca6 Back out the change from TCP/IP vol 2, in revision 1.7, which removed TH_FIN
from the output flags for CLOSING state.  There is no harm in retransmitting
the FIN, and this change has unexpected side effects that break simultaneous
close behaviour.
1998-07-09 05:49:56 +00:00
sommerfe 065cac9798 Delete bogus (void) cast of m_freem (which is already a void function..) 1998-07-07 00:04:59 +00:00
jonathan b37021c1a1 defopt NATM. 1998-07-05 22:48:05 +00:00
jonathan 9bf2ba0928 Garbage-collect ``needs-flag'' from attributes ether, fddi, arc:
NETHER, NFDDI, NARC are  not used anywhere. Remove #include "ether.h",
   which had no effect.
Removes clash with "options NATM" for native-ATM network protocol stack.
1998-07-05 22:29:51 +00:00
jonathan 011f2bda08 defopt NS, NSIP. 1998-07-05 06:49:00 +00:00
jonathan 5c0c5dd0b4 defopt ISO TPIP. 1998-07-05 04:37:35 +00:00
jonathan f2a2327e0a defopt EON. 1998-07-05 01:06:49 +00:00
jonathan 3751946b97 defopt INET, NETATALK. 1998-07-05 00:51:04 +00:00
jonathan 466e784ee1 defopt DDB. 1998-07-04 22:18:13 +00:00
thorpej 8cfe8959a6 Fix TCPS_HAVERCVDFIN() to actually catch all TCP states in which a FIN
has been received (CLOSE_WAIT, CLOSING, LAST_ACK, and TIME_WAIT).

From David Borman <dab@bsdi.com>.
1998-07-03 05:39:56 +00:00
is 0ca02c68a7 Thinko in last fix: we have to actually check each address for a copy on
our ifp, else we might fail for some strange configurations.
1998-07-02 14:00:39 +00:00
is d8b8a41918 The rewrite of if_arp.c to work with the hashed interface address lists
(1.44) missed a test for the right interface, making some machines answer
to some bogus arp requests (like for WHO-HAS 127.0.0.1).

The quick patch in 1.46-1.47 does not work for so-called "unnumbered"
interfaces, that is, (point-to-point) interfaces that share their local
address with another (e.g., the Ethernet) interface.

We add a macro to in_var.h, to step (in the current implementation) through
the hash chain and fine more entries with the same address, and use that
in if_arp.c to find one which belongs to our interface.
1998-07-02 11:39:56 +00:00
tls b0d2c08b6b Fix buglet where we might respond to arp on wrong interface. 1998-06-25 20:47:48 +00:00
cgd 651b44e211 Rework the way kernel include files are installed. In the new method,
as with user-land programs, include files are installed by each directory
in the tree that has includes to install.  (This allows more flexibility
as to what gets installed, makes 'partial installs' easier, and gives us
more options as to which machines' includes get installed at any given
time.)  The old SYS_INCLUDES={symlinks,copies} behaviours are _both_
still supported, though at least one bug in the 'symlinks' case is
fixed by this change.  Include files can't be build before installation,
so directories that have includes as targets (e.g. dev/pci) have to move
those targets into a different Makefile.
1998-06-12 23:22:30 +00:00
sommerfe a90d5cd12e Truncate mbufs to the correct length before forwarding; fixes pr5560 1998-06-10 00:47:57 +00:00
thorpej b22946827d Add a comment explaining why we do _not_ ACK data that might accompany
a SYN (avoidance of a DoS attack).
1998-06-02 18:33:02 +00:00
thorpej c296923d2f Loss window MUST be one segment, per draft-floyd-incr-init-win-03. 1998-06-02 17:22:26 +00:00
thorpej edc01ec330 In addition to the IP flow hash table, put the flows on a list. The table
is used for fast lookup, the list for traversal of all flows.  Also, use
PRT timers.
1998-06-02 15:48:03 +00:00
thorpej 837a8317b5 Eek, we were wasting almost half of the in_ifaddr hash space by modulo'ing
with IN_IFADDR_HASH_SIZE.  Instead, AND with the hash mask computed by
hashinit().
1998-06-01 00:50:07 +00:00
thorpej 08b5a4ecb8 Protect the ipflow_reap() call with splsoftnet. 1998-06-01 00:39:37 +00:00
cgd dd8ed56342 Another demonstration that when you're converting variables from 'long's
to fixed 32-bit integers, you have to exercise care.
1998-05-31 19:39:13 +00:00
veego 6250554a65 Fix compiler warnings: Add missing ()'s. 1998-05-29 20:28:17 +00:00
veego 630030601c Fix some compiler warnings: Missing prototype and ()'s. 1998-05-29 20:27:18 +00:00
veego a4c89e3e2e Resolve conflicts from the import of IPFilter 3.2.7. 1998-05-29 20:24:36 +00:00
matt c0a1601f95 Change arp so its console log messages print out IP addresses in
dotted quad format instead of hex.
1998-05-29 15:34:24 +00:00
thorpej f555f6d93f Fix OBOB in IP timestamp option processing, as noted in FreeBSD PR 6738,
from Jennifer Dawn Meyers <jdm@enteract.com>.
1998-05-24 20:14:53 +00:00
matt f070ddb8ed Move the ppcb pointer towards the front of the structure so that it and the
pcb chain pointers can possibly be in the same cache line.
1998-05-18 17:10:37 +00:00
matt 1b2b1d801b Fix two bugs. 1998-05-18 17:08:56 +00:00
veego 82423e3d01 Resolve conflicts 1998-05-17 16:50:15 +00:00
kml dd5ed34b88 Changed initialization of peermss to ensure that it didn't have
the TCP and IP options lengths removed from it -- the IP options can
change over the course of a connection...
1998-05-12 21:45:51 +00:00
thorpej c5fc2e9acd Back out previous. This problem was already fixed in a different way. 1998-05-11 23:13:40 +00:00
matt 53b04a8d3c Let usr.sbin/tcpdump build again. 1998-05-11 23:09:35 +00:00
thorpej 49573284f5 Make sure a timer is marked "disarmed" once it has expired. 1998-05-11 20:52:18 +00:00
thorpej 5596fe2614 Nuke TUBA per my note to tech-net; there's no reason to keep it around. 1998-05-11 19:57:23 +00:00
kml 1216b9a560 Change comments on tcp_mss_to_advertise to match actual arguments 1998-05-07 22:30:23 +00:00
thorpej ce3d776874 Rework the syn cache code somewhat:
- Don't use home-grown queue manipulation.  Use <sys/queue.h> instead.  The
  data structures are a little larger, but we are otherwise wasting the
  memory chunk anyway (we're already a 64-byte malloc bucket).
- Fix a bug in the cache-is-full case: if the oldest element removed from
  the first non-empty bucket was the only element in the bucket, the
  bucket wouldn't be removed from the bucket cache, causing queue corruption
  later.
- Optimize the syn cache timers by using PRT timers rather than home-grown
  decrement-and-propagate timers.

This code is now a fair bit smaller, and significantly easier to read
and understand.
1998-05-07 01:37:27 +00:00
thorpej dc49b0342e Define all TCP timers in terms of PRT timers. 1998-05-07 01:30:46 +00:00
thorpej 34e34c985a Use the monotonically increasing slow timer timestamp provided by
the protocol dispatch layer for TCP timers.  This saves having to
modify a potentially large number of timer values (which were shorts,
and expanded to ... a lot of code on the Alpha).
1998-05-06 01:24:38 +00:00
thorpej 1ffa60ac01 Use macros from tcp_timer.h to manipulate TCP timers, so that their
implementation can be changed easily.
1998-05-06 01:21:20 +00:00
matt 36eac04cc0 Default IP flow to being enabled. Add a sysctl to control the maximum
number of flows (net.inet.ip.maxflows).  If set to 0, will disable fast
path forwarding.
1998-05-04 19:24:53 +00:00
thorpej 447384d6b8 - kern/5380 (Dennis Ferguson): fix incremental IP header checksum.
- kern/5381 (Dennis Ferguson): check IP header checksum in fast forward
  code.
- In ipflow_slowtimo(), if no IP flows are in use, don't bother checking
  all of the hash buckets.
1998-05-04 05:46:04 +00:00
thorpej e44c4fb7d3 Once again, move a declaration for the benefit of TUBA (grumble). 1998-05-03 19:54:56 +00:00
thorpej b9fc258065 Oops, move a variable declaration so TUBA won't lose. 1998-05-02 04:23:05 +00:00
thorpej b71e4ddf4c Reintroduce the immediate ACK-on-PUSH behavior removed in revision 1.47,
but make the decision to do this dependent on the sysctl variable
net.inet.tcp.ack_on_push, which is disabled by default.
1998-05-02 04:21:58 +00:00
thorpej e1934b4c36 Correct a comment related to Congestion Window Monitoring. 1998-05-02 01:00:24 +00:00
thorpej be12c489b4 Garbage-collect. 1998-05-01 18:31:12 +00:00
thorpej 77af553e79 If packets are passed through IP Filter at all, don't allow fast-forward
flow entries to be created for them.

Eventually, IP Filter should be extended to allow IP src/dst pairs to
be specified as "fast forward OK".
1998-05-01 03:28:14 +00:00
thorpej 4452bc9a21 Allow packet filters to prevent a packet from creating a fast-forwarding
flow, by setting the "can fast forward" flag in the packet header, and
giving a chance for filters to clear the flag.  If the flag is still
set after the filters have given it a chance, the packet will be used
to create a fast-forward flow entry.
1998-05-01 03:23:24 +00:00
kml e173e7a084 Remove bogus black hole discovery code 1998-05-01 01:15:55 +00:00
thorpej ce40806e29 In the CWM code, don't use the Floyd initial window computation as
the burst size allowed, but rather a fixed number of packets, as
described in the Internet Draft.  Default allowed burst is 4 packets,
per the Draft.

Make the use of CWM and the allowed burst size tunable via sysctl.
1998-04-30 18:27:20 +00:00
thorpej e81920fa23 Make tcp_compat_42 a sysctl option. 1998-04-30 17:55:27 +00:00
thorpej 7e05be912b Need <net/route.h> 1998-04-30 17:47:26 +00:00
matt d4d709f7d0 Add support for "fast" forwarding. Add hooks in if_ethersubr.c and
if_fddisubr.c to fastpath IP forwarding.  If ip_forward successfully
forwards a packet, it will create a cache (ipflow) entry.  ether_input
and fddi_input will first call ipflow_fastforward with the received
packet and if the packet passes enough tests, it will be forwarded (the
ttl is decremented and the cksum is adjusted incrementally).
1998-04-29 21:37:52 +00:00
matt 37d70e3b46 defopt GATEWAY 1998-04-29 20:45:30 +00:00
matt 334f006538 New TCP reassembly code. The new code reduces the memory needed by
out-of-order packets and builds the infrastructure needed for sending
SACK blocks (to be added shortly).
1998-04-29 20:43:29 +00:00
thorpej 00d50da592 Fix some whitespace. 1998-04-29 05:44:47 +00:00
thorpej 13f972a4d6 Make use of the work-arounds for ancient broken TCP peers run-time
conditional (tcp_compat_42).  The kernel config option TCP_COMPAT_42
will still enable this by default, or disable this by default if the
option is not included (i.e. current behavior).  This will be made a
sysctl soon.
1998-04-29 05:16:46 +00:00
kml eadcaa201c change path MTU timeout value to match RFC 1191 1998-04-29 03:45:52 +00:00
kml 1579dcec47 Add support for deletion of routes added by path MTU discovery;
uses new generic route timeout code.  Add sysctl for timeout period.
1998-04-29 03:44:11 +00:00
thorpej 100bfaf39a Change RFC1323 timestamp update rule per Section 3.4 of RFC1323.bis. Old
rule was to update the timestamp if the sequence numbers are in range.  New
rule adds a check that the timestamp is advancing, thus preventing our notion
of the most recent timestamp from incorrectly moving backwards.
1998-04-29 00:43:46 +00:00