Commit Graph

290 Commits

Author SHA1 Message Date
Pawel Jakub Dawidek
b0330ed929 Reduce 'td' argument to 'cred' (struct ucred) argument in those functions:
- in_pcbbind(),
	- in_pcbbind_setup(),
	- in_pcbconnect(),
	- in_pcbconnect_setup(),
	- in6_pcbbind(),
	- in6_pcbconnect(),
	- in6_pcbsetport().
"It should simplify/clarify things a great deal." --rwatson

Requested by:	rwatson
Reviewed by:	rwatson, ume
2004-03-27 21:05:46 +00:00
Pawel Jakub Dawidek
6823b82399 Remove unused argument.
Reviewed by:	ume
2004-03-27 20:41:32 +00:00
Pawel Jakub Dawidek
8da601dfb7 Remove unused function.
It was used in FreeBSD 4.x, but now we're using cr_canseesocket().
2004-03-25 15:12:12 +00:00
Robert Watson
846840ba95 Scrub unused variable zeroin_addr. 2004-03-10 01:01:04 +00:00
Hajimu UMEMOTO
548c676b32 do not deref freed pointer
Submitted by:	"Bjoern A. Zeeb" <bzeeb+freebsd@zabbadoz.net>
Reviewed by:	itojun
2004-01-13 09:51:47 +00:00
Andre Oppermann
0cfbbe3bde Make sure all uses of stack allocated struct route's are properly
zeroed.  Doing a bzero on the entire struct route is not more
expensive than assigning NULL to ro.ro_rt and bzero of ro.ro_dst.

Reviewed by:	sam (mentor)
Approved by:	re  (scottl)
2003-11-26 20:31:13 +00:00
Sam Leffler
5bd311a566 Split the "inp" mutex class into separate classes for each of divert,
raw, tcp, udp, raw6, and udp6 sockets to avoid spurious witness
complaints.

Reviewed by:	rwatson
Approved by:	re (rwatson)
2003-11-26 01:40:44 +00:00
Thomas Moestl
1f831750b5 bzero() the the sockaddr used for the destination address for
rtalloc_ign() in in_pcbconnect_setup() before it is filled out.
Otherwise, stack junk would be left in sin_zero, which could
cause host routes to be ignored because they failed the comparison
in rn_match().
This should fix the wrong source address selection for connect() to
127.0.0.1, among other things.

Reviewed by:	sam
Approved by:	re (rwatson)
2003-11-23 03:02:00 +00:00
Andre Oppermann
97d8d152c2 Introduce tcp_hostcache and remove the tcp specific metrics from
the routing table.  Move all usage and references in the tcp stack
from the routing table metrics to the tcp hostcache.

It caches measured parameters of past tcp sessions to provide better
initial start values for following connections from or to the same
source or destination.  Depending on the network parameters to/from
the remote host this can lead to significant speedups for new tcp
connections after the first one because they inherit and shortcut
the learning curve.

tcp_hostcache is designed for multiple concurrent access in SMP
environments with high contention and is hash indexed by remote
ip address.

It removes significant locking requirements from the tcp stack with
regard to the routing table.

Reviewed by:	sam (mentor), bms
Reviewed by:	-net, -current, core@kame.net (IPv6 parts)
Approved by:	re (scottl)
2003-11-20 20:07:39 +00:00
Robert Watson
a557af222b Introduce a MAC label reference in 'struct inpcb', which caches
the   MAC label referenced from 'struct socket' in the IPv4 and
IPv6-based protocols.  This permits MAC labels to be checked during
network delivery operations without dereferencing inp->inp_socket
to get to so->so_label, which will eventually avoid our having to
grab the socket lock during delivery at the network layer.

This change introduces 'struct inpcb' as a labeled object to the
MAC Framework, along with the normal circus of entry points:
initialization, creation from socket, destruction, as well as a
delivery access control check.

For most policies, the inpcb label will simply be a cache of the
socket label, so a new protocol switch method is introduced,
pr_sosetlabel() to notify protocols that the socket layer label
has been updated so that the cache can be updated while holding
appropriate locks.  Most protocols implement this using
pru_sosetlabel_null(), but IPv4/IPv6 protocols using inpcbs use
the the worker function in_pcbsosetlabel(), which calls into the
MAC Framework to perform a cache update.

Biba, LOMAC, and MLS implement these entry points, as do the stub
policy, and test policy.

Reviewed by:	sam, bms
Obtained from:	TrustedBSD Project
Sponsored by:	DARPA, Network Associates Laboratories
2003-11-18 00:39:07 +00:00
Sam Leffler
f7bbe2c0f1 add missing inpcb lock before call to tcp_twclose (which reclaims the inpcb)
Supported by:	FreeBSD Foundation
2003-11-13 05:18:23 +00:00
Sam Leffler
1b73ca0bf1 o reorder some locking asserts to reflect the order of the locks
o correct a read-lock assert in in_pcblookup_local that should be
  a write-lock assert (since time wait close cleanups may alter state)

Supported by:	FreeBSD Foundation
2003-11-13 05:16:56 +00:00
Ian Dowse
3ab2096b80 In in_pcbconnect_setup(), don't use the cached inp->inp_route unless
it is marked as RTF_UP. This appears to fix a crash that was sometimes
triggered when dhclient(8) tried to send a packet after an interface
had been detatched.

Reviewed by:	sam
2003-11-10 22:45:37 +00:00
Sam Leffler
59daba27d9 add locking assertions
Supported by:	FreeBSD Foundation
2003-11-08 23:02:36 +00:00
Hajimu UMEMOTO
0f9ade718d - cleanup SP refcnt issue.
- share policy-on-socket for listening socket.
- don't copy policy-on-socket at all.  secpolicy no longer contain
  spidx, which saves a lot of memory.
- deep-copy pcb policy if it is an ipsec policy.  assign ID field to
  all SPD entries.  make it possible for racoon to grab SPD entry on
  pcb.
- fixed the order of searching SA table for packets.
- fixed to get a security association header.  a mode is always needed
  to compare them.
- fixed that the incorrect time was set to
  sadb_comb_{hard|soft}_usetime.
- disallow port spec for tunnel mode policy (as we don't reassemble).
- an user can define a policy-id.
- clear enc/auth key before freeing.
- fixed that the kernel crashed when key_spdacquire() was called
  because key_spdacquire() had been implemented imcopletely.
- preparation for 64bit sequence number.
- maintain ordered list of SA, based on SA id.
- cleanup secasvar management; refcnt is key.c responsibility;
  alloc/free is keydb.c responsibility.
- cleanup, avoid double-loop.
- use hash for spi-based lookup.
- mark persistent SP "persistent".
  XXX in theory refcnt should do the right thing, however, we have
  "spdflush" which would touch all SPs.  another solution would be to
  de-register persistent SPs from sptree.
- u_short -> u_int16_t
- reduce kernel stack usage by auto variable secasindex.
- clarify function name confusion.  ipsec_*_policy ->
  ipsec_*_pcbpolicy.
- avoid variable name confusion.
  (struct inpcbpolicy *)pcb_sp, spp (struct secpolicy **), sp (struct
  secpolicy *)
- count number of ipsec encapsulations on ipsec4_output, so that we
  can tell ip_output() how to handle the packet further.
- When the value of the ul_proto is ICMP or ICMPV6, the port field in
  "src" of the spidx specifies ICMP type, and the port field in "dst"
  of the spidx specifies ICMP code.
- avoid from applying IPsec transport mode to the packets when the
  kernel forwards the packets.

Tested by:	nork
Obtained from:	KAME
2003-11-04 16:02:05 +00:00
Mike Silbersack
96af9ea52b - Add a new function tcp_twrecycleable, which tells us if the ISN which
we will generate for a given ip/port tuple has advanced far enough
for the time_wait socket in question to be safely recycled.

- Have in_pcblookup_local use tcp_twrecycleable to determine if
time_Wait sockets which are hogging local ports can be safely
freed.

This change preserves proper TIME_WAIT behavior under normal
circumstances while allowing for safe and fast recycling whenever
ephemeral port space is scarce.
2003-11-01 07:30:08 +00:00
Sam Leffler
9c63e9dbd7 Overhaul routing table entry cleanup by introducing a new rtexpunge
routine that takes a locked routing table reference and removes all
references to the entry in the various data structures. This
eliminates instances of recursive locking and also closes races
where the lock on the entry had to be dropped prior to calling
rtrequest(RTM_DELETE).  This also cleans up confusion where the
caller held a reference to an entry that might have been reclaimed
(and in some cases used that reference).

Supported by:	FreeBSD Foundation
2003-10-30 23:02:51 +00:00
Sam Leffler
d1dd20be6e Locking for updates to routing table entries. Each rtentry gets a mutex
that covers updates to the contents.  Note this is separate from holding
a reference and/or locking the routing table itself.

Other/related changes:

o rtredirect loses the final parameter by which an rtentry reference
  may be returned; this was never used and added unwarranted complexity
  for locking.
o minor style cleanups to routing code (e.g. ansi-fy function decls)
o remove the logic to bump the refcnt on the parent of cloned routes,
  we assume the parent will remain as long as the clone; doing this avoids
  a circularity in locking during delete
o convert some timeouts to MPSAFE callouts

Notes:

1. rt_mtx in struct rtentry is guarded by #ifdef _KERNEL as user-level
   applications cannot/do-no know about mutex's.  Doing this requires
   that the mutex be the last element in the structure.  A better solution
   is to introduce an externalized version of struct rtentry but this is
   a major task because of the intertwining of rtentry and other data
   structures that are visible to user applications.
2. There are known LOR's that are expected to go away with forthcoming
   work to eliminate many held references.  If not these will be resolved
   prior to release.
3. ATM changes are untested.

Sponsored by:	FreeBSD Foundation
Obtained from:	BSD/OS (partly)
2003-10-04 03:44:50 +00:00
John Baldwin
8b149b5131 Consistently use the BSD u_int and u_short instead of the SYSV uint and
ushort.  In most of these files, there was a mixture of both styles and
this change just makes them self-consistent.

Requested by:	bde (kern_ktrace.c)
2003-08-07 15:04:27 +00:00
Alexander Kabaev
104a9b7e3e Deprecate machine/limits.h in favor of new sys/limits.h.
Change all in-tree consumers to include <sys/limits.h>

Discussed on:	standards@
Partially submitted by: Craig Rodrigues <rodrigc@attbi.com>
2003-04-29 13:36:06 +00:00
Crist J. Clark
b0d226932e The ancient and outdated concept of "privileged ports" in UNIX-type
OSes has probably caused more problems than it ever solved. Allow the
user to retire the old behavior by specifying their own privileged
range with,

  net.inet.ip.portrange.reservedhigh  default = IPPORT_RESERVED - 1
  net.inet.ip.portrange.reservedlo    default = 0

Now you can run that webserver without ever needing root at all. Or
just imagine, an ftpd that can really drop privileges, rather than
just set the euid, and still do PORT data transfers from 20/tcp.

Two edge cases to note,

  # sysctl net.inet.ip.portrange.reservedhigh=0

Opens all ports to everyone, and,

  # sysctl net.inet.ip.portrange.reservedhigh=65535

Locks all network activity to root only (which could actually have
been achieved before with ipfw(8), but is somewhat more
complicated).

For those who stick to the old religion that 0-1023 belong to root and
root alone, don't touch the knobs (or even lock them by raising
securelevel(8)), and nothing changes.
2003-02-21 05:28:27 +00:00
Jonathan Lemon
340c35de6a Add a TCP TIMEWAIT state which uses less space than a fullblown TCP
control block.  Allow the socket and tcpcb structures to be freed
earlier than inpcb.  Update code to understand an inp w/o a socket.

Reviewed by: hsu, silby, jayanth
Sponsored by: DARPA, NAI Labs
2003-02-19 22:32:43 +00:00
Warner Losh
a163d034fa Back out M_* changes, per decision of the TRB.
Approved by: trb
2003-02-19 05:47:46 +00:00
Jeffrey Hsu
3dc7ebf9ff in_pcbnotifyall() requires an exclusive protocol lock for notify functions
which modify the connection list, namely, tcp_notify().
2003-02-12 23:55:07 +00:00
Sam Leffler
28a34902c4 remove the restriction on build a kernel with FAST_IPSEC and INET6;
you still don't want to use the two together, but it's ok to have
them in the same kernel (the problem that initiated this bandaid
has long since been fixed)
2003-01-30 05:43:08 +00:00
Alfred Perlstein
44956c9863 Remove M_TRYWAIT/M_WAITOK/M_WAIT. Callers should use 0.
Merge M_NOWAIT/M_DONTWAIT into a single flag M_NOWAIT.
2003-01-21 08:56:16 +00:00
Sam Leffler
9c0a8ace11 temporarily disallow FAST_IPSEC and INET6 to avoid potential panics;
will correct this before 5.0 release
2002-11-08 23:50:32 +00:00
Ian Dowse
5200e00e72 Replace in_pcbladdr() with a more generic inner subroutine for
in_pcbconnect() called in_pcbconnect_setup(). This version performs
all of the functions of in_pcbconnect() except for the final
committing of changes to the PCB. In the case of an EADDRINUSE error
it can also provide to the caller the PCB of the duplicate connection,
avoiding an extra in_pcblookup_hash() lookup in tcp_connect().

This change will allow the "temporary connect" hack in udp_output()
to be removed and is part of the preparation for adding the
IP_SENDSRCADDR control message.

Discussed on:	-net
Approved by:	re
2002-10-21 13:55:50 +00:00
Ian Dowse
4b932371f4 Split out most of the logic from in_pcbbind() into a new function
called in_pcbbind_setup() that does everything except commit the
changes to the PCB. There should be no functional change here, but
in_pcbbind_setup() will be used by the soon-to-appear IP_SENDSRCADDR
control message implementation to check or allocate the source
address and port.

Discussed on:	-net
Approved by:	re
2002-10-20 21:44:31 +00:00
Sam Leffler
b9234fafa0 Tie new "Fast IPsec" code into the build. This involves the usual
configuration stuff as well as conditional code in the IPv4 and IPv6
areas.  Everything is conditional on FAST_IPSEC which is mutually
exclusive with IPSEC (KAME IPsec implmentation).

As noted previously, don't use FAST_IPSEC with INET6 at the moment.

Reviewed by:	KAME, rwatson
Approved by:	silence
Supported by:	Vernier Networks
2002-10-16 02:25:05 +00:00
Don Lewis
26ef6ac4df Create new functions in_sockaddr(), in6_sockaddr(), and
in6_v4mapsin6_sockaddr() which allocate the appropriate sockaddr_in*
structure and initialize it with the address and port information passed
as arguments.  Use calls to these new functions to replace code that is
replicated multiple times in in_setsockaddr(), in_setpeeraddr(),
in6_setsockaddr(), in6_setpeeraddr(), in6_mapped_sockaddr(), and
in6_mapped_peeraddr().  Inline COMMON_END in tcp_usr_accept() so that
we can call in_sockaddr() with temporary copies of the address and port
after the PCB is unlocked.

Fix the lock violation in tcp6_usr_accept() (caused by calling MALLOC()
inside in6_mapped_peeraddr() while the PCB is locked) by changing
the implementation of tcp6_usr_accept() to match tcp_usr_accept().

Reviewed by:	suz
2002-08-21 11:57:12 +00:00
Hajimu UMEMOTO
eccb7001ee cleanup usage of ip6_mapped_addr_on and ip6_v6only. now,
ip6_mapped_addr_on is unified into ip6_v6only.

MFC after:	1 week
2002-07-25 17:40:45 +00:00
Jeffrey Hsu
3ce144ea88 Notify functions can destroy the pcb, so they have to return an
indication of whether this happenned so the calling function
knows whether or not to unlock the pcb.

Submitted by:	Jennifer Yang (yangjihui@yahoo.com)
Bug reported by:  Sid Carter (sidcarter@symonds.net)
2002-06-14 08:35:21 +00:00
Jeffrey Hsu
3cfcc388ea Fix typo where INP_INFO_RLOCK should be INP_INFO_RUNLOCK.
Submitted by: tegge, jlemon

Prefer LIST_FOREACH macro.
  Submitted by: jlemon
2002-06-12 03:08:08 +00:00
Jeffrey Hsu
f76fcf6d4c Lock up inpcb.
Submitted by:	Jennifer Yang <yangjihui@yahoo.com>
2002-06-10 20:05:46 +00:00
Seigo Tanimura
4cc20ab1f0 Back out my lats commit of locking down a socket, it conflicts with hsu's work.
Requested by:	hsu
2002-05-31 11:52:35 +00:00
Seigo Tanimura
243917fe3b Lock down a socket, milestone 1.
o Add a mutex (sb_mtx) to struct sockbuf. This protects the data in a
  socket buffer. The mutex in the receive buffer also protects the data
  in struct socket.

o Determine the lock strategy for each members in struct socket.

o Lock down the following members:

  - so_count
  - so_options
  - so_linger
  - so_state

o Remove *_locked() socket APIs.  Make the following socket APIs
  touching the members above now require a locked socket:

 - sodisconnect()
 - soisconnected()
 - soisconnecting()
 - soisdisconnected()
 - soisdisconnecting()
 - sofree()
 - soref()
 - sorele()
 - sorwakeup()
 - sotryfree()
 - sowakeup()
 - sowwakeup()

Reviewed by:	alfred
2002-05-20 05:41:09 +00:00
John Baldwin
ad278afdf0 Change the first argument of prison_xinpcb() to be a thread pointer instead
of a proc pointer so that prison_xinpcb() can use td_ucred.
2002-04-09 20:04:10 +00:00
John Baldwin
44731cab3b Change the suser() API to take advantage of td_ucred as well as do a
general cleanup of the API.  The entire API now consists of two functions
similar to the pre-KSE API.  The suser() function takes a thread pointer
as its only argument.  The td_ucred member of this thread must be valid
so the only valid thread pointers are curthread and a few kernel threads
such as thread0.  The suser_cred() function takes a pointer to a struct
ucred as its first argument and an integer flag as its second argument.
The flag is currently only used for the PRISON_ROOT flag.

Discussed on:	smp@
2002-04-01 21:31:13 +00:00
Mike Silbersack
9e5a5ed4c5 Change the ephemeral port range from 1024-5000 to 49152-65535.
This increases the number of concurrent outgoing connections from ~4000
to ~16000.  Other OSes (Solaris, OS X, NetBSD) and many other NAT
products have already made this change without ill effects, so we
should not run into any problems.

MFC after:	1 week
2002-03-22 03:28:11 +00:00
Jeff Roberson
69c2d429c1 Switch vm_zone.h with uma.h. Change over to uma interfaces. 2002-03-20 05:48:55 +00:00
Alfred Perlstein
4d77a549fe Remove __P. 2002-03-19 21:25:46 +00:00
John Baldwin
a854ed9893 Simple p_ucred -> td_ucred changes to start using the per-thread ucred
reference.
2002-02-27 18:32:23 +00:00
Hajimu UMEMOTO
a4a6e77341 - Check the address family of the destination cached in a PCB.
- Clear the cached destination before getting another cached route.
  Otherwise, garbage in the padding space (which might be filled in if it was
  used for IPv4) could annoy rtalloc.

Obtained from:	KAME
2002-01-21 20:04:22 +00:00
Jonathan Lemon
eaa6d8efe5 Minor style fixes. 2001-12-13 04:01:23 +00:00
Robert Watson
011376308f o Introduce pr_mtx into struct prison, providing protection for the
mutable contents of struct prison (hostname, securelevel, refcount,
  pr_linux, ...)
o Generally introduce mtx_lock()/mtx_unlock() calls throughout kern/
  so as to enforce these protections, in particular, in kern_mib.c
  protection sysctl access to the hostname and securelevel, as well as
  kern_prot.c access to the securelevel for access control purposes.
o Rewrite linux emulator abstractions for accessing per-jail linux
  mib entries (osname, osrelease, osversion) so that they don't return
  a pointer to the text in the struct linux_prison, rather, a copy
  to an array passed into the calls.  Likewise, update linprocfs to
  use these primitives.
o Update in_pcb.c to always use prison_getip() rather than directly
  accessing struct prison.

Reviewed by:	jhb
2001-12-03 16:12:27 +00:00
Jonathan Lemon
be2ac88c59 Introduce a syncache, which enables FreeBSD to withstand a SYN flood
DoS in an improved fashion over the existing code.

Reviewed by: silby  (in a previous iteration)
Sponsored by: DARPA, NAI Labs
2001-11-22 04:50:44 +00:00
Matthew Dillon
b1e4abd246 Give struct socket structures a ref counting interface similar to
vnodes.  This will hopefully serve as a base from which we can
expand the MP code.  We currently do not attempt to obtain any
mutex or SX locks, but the door is open to add them when we nail
down exactly how that part of it is going to work.
2001-11-17 03:07:11 +00:00
Andrew R. Reiter
83103a7397 - Fixes non-zero'd out sin_zero field problem so that the padding
is used as it is supposed to be.

Inspired by: PR #31704
Approved by: jdp
Reviewed by: jhb, -net@
2001-11-06 00:48:01 +00:00
Ruslan Ermilov
8071913df2 Pull post-4.4BSD change to sys/net/route.c from BSD/OS 4.2.
Have sys/net/route.c:rtrequest1(), which takes ``rt_addrinfo *''
as the argument.  Pass rt_addrinfo all the way down to rtrequest1
and ifa->ifa_rtrequest.  3rd argument of ifa->ifa_rtrequest is now
``rt_addrinfo *'' instead of ``sockaddr *'' (almost noone is
using it anyways).

Benefit: the following command now works.  Previously we needed
two route(8) invocations, "add" then "change".
# route add -inet6 default ::1 -ifp gif0

Remove unsafe typecast in rtrequest(), from ``rtentry *'' to
``sockaddr *''.  It was introduced by 4.3BSD-Reno and never
corrected.

Obtained from:	BSD/OS, NetBSD
MFC after:	1 month
PR:		kern/28360
2001-10-17 18:07:05 +00:00
Jonathan Lemon
9a10980e2a Centralize satosin(), sintosa() and ifatoia() macros in <netinet/in.h>
Remove local definitions.
2001-09-29 03:23:44 +00:00
Brooks Davis
9494d5968f Make faith loadable, unloadable, and clonable. 2001-09-25 18:40:52 +00:00
Julian Elischer
b40ce4165d KSE Milestone 2
Note ALL MODULES MUST BE RECOMPILED
make the kernel aware that there are smaller units of scheduling than the
process. (but only allow one thread per process at this time).
This is functionally equivalent to teh previousl -current except
that there is a thread associated with each process.

Sorry john! (your next MFC will be a doosie!)

Reviewed by: peter@freebsd.org, dillon@freebsd.org

X-MFC after:    ha ha ha ha
2001-09-12 08:38:13 +00:00
Hajimu UMEMOTO
e43cc4ae36 When running aplication joined multicast address,
removing network card, and kill aplication.
imo_membership[].inm_ifp refer interface pointer
after removing interface.
When kill aplication, release socket,and imo_membership.
imo_membership use already not exist interface pointer.
Then, kernel panic.

PR:		29345
Submitted by:	Inoue Yuichi <inoue@nd.net.fujitsu.co.jp>
Obtained from:	KAME
MFC after:	3 days
2001-08-04 17:10:14 +00:00
Hajimu UMEMOTO
13cf67f317 move ipsec security policy allocation into in_pcballoc, before
making pcbs available to the outside world.  otherwise, we will see
inpcb without ipsec security policy attached (-> panic() in ipsec.c).

Obtained from:	KAME
MFC after:	3 days
2001-07-26 19:19:49 +00:00
Ruslan Ermilov
8bf82a92d5 Backout CSRG revision 7.22 to this file (if in_losing notices an
RTF_DYNAMIC route, it got freed twice).  I am not sure what was
the actual problem in 1992, but the current behavior is memory
leak if PCB holds a reference to a dynamically created/modified
routing table entry.  (rt_refcnt>0 and we don't call rtfree().)

My test bed was:

1.  Set net.inet.tcp.msl to a low value (for test purposes), e.g.,
    5 seconds, to speed up the transition of TCP connection to a
    "closed" state.
2.  Add a network route which causes ICMP redirect from the gateway.
3.  ping(8) host H that matches this route; this creates RTF_DYNAMIC
    RTF_HOST route to H.  (I was forced to use ICMP to cause gateway
    to generate ICMP host redirect, because gateway in question is a
    4.2-STABLE system vulnerable to a problem that was fixed later in
    ip_icmp.c,v 1.39.2.6, and TCP packets with DF bit set were
    triggering this bug.)
4.  telnet(1) to H
5.  Block access to H with ipfw(8)
6.  Send something in telnet(1) session; this causes EPERM, followed
    by an in_losing() call in a few seconds.
7.  Delete ipfw(8) rule blocking access to H, and wait for TCP
    connection moving to a CLOSED state; PCB is freed.
8.  Delete host route to H.
9.  Watch with netstat(1) that `rttrash' increased.
10. Repeat steps 3-9, and watch `rttrash' increases.

PR:		kern/25421
MFC after:	2 weeks
2001-06-29 12:07:29 +00:00
Hajimu UMEMOTO
3384154590 Sync with recent KAME.
This work was based on kame-20010528-freebsd43-snap.tgz and some
critical problem after the snap was out were fixed.
There are many many changes since last KAME merge.

TODO:
  - The definitions of SADB_* in sys/net/pfkeyv2.h are still different
    from RFC2407/IANA assignment because of binary compatibility
    issue.  It should be fixed under 5-CURRENT.
  - ip6po_m member of struct ip6_pktopts is no longer used.  But, it
    is still there because of binary compatibility issue.  It should
    be removed under 5-CURRENT.

Reviewed by:	itojun
Obtained from:	KAME
MFC after:	3 weeks
2001-06-11 12:39:29 +00:00
Poul-Henning Kamp
ccd6f42dc9 Fix a style(9) nit. 2001-03-16 19:36:23 +00:00
Poul-Henning Kamp
503d3c0277 Correctly cleanup in case of failure to bind a pcb.
PR:		25751
Submitted by:	<unicorn@Forest.Od.UA>
2001-03-12 21:53:23 +00:00
Bosko Milekic
234ff7c46f During a flood, we don't call rtfree(), but we remove the entry ourselves.
However, if the RTF_DELCLONE and RTF_WASCLONED condition passes, but the ref
count is > 1, we won't decrement the count at all. This could lead to
route entries never being deleted.

Here, we call rtfree() not only if the initial two conditions fail, but
also if the ref count is > 1 (and we therefore don't immediately delete
the route, but let rtfree() handle it).

This is an urgent MFC candidate. Thanks go to Mike Silbersack for the
fix, once again. :-)

Submitted by: Mike Silbersack <silby@silby.com>
2001-03-04 21:28:40 +00:00
Poul-Henning Kamp
970680fad8 Fix jails. 2001-02-28 09:38:48 +00:00
Jonathan Lemon
c693a045de Remove in_pcbnotify and use in_pcblookup_hash to find the cb directly.
For TCP, verify that the sequence number in the ICMP packet falls within
the tcp receive window before performing any actions indicated by the
icmp packet.

Clean up some layering violations (access to tcp internals from in_pcb)
2001-02-26 21:19:47 +00:00
Jesper Skriver
d1c54148b7 Redo the security update done in rev 1.54 of src/sys/netinet/tcp_subr.c
and 1.84 of src/sys/netinet/udp_usrreq.c

The changes broken down:

- remove 0 as a wildcard for addresses and port numbers in
  src/sys/netinet/in_pcb.c:in_pcbnotify()
- add src/sys/netinet/in_pcb.c:in_pcbnotifyall() used to notify
  all sessions with the specific remote address.
- change
  - src/sys/netinet/udp_usrreq.c:udp_ctlinput()
  - src/sys/netinet/tcp_subr.c:tcp_ctlinput()
  to use in_pcbnotifyall() to notify multiple sessions, instead of
  using in_pcbnotify() with 0 as src address and as port numbers.
- remove check for src port == 0 in
  - src/sys/netinet/tcp_subr.c:tcp_ctlinput()
  - src/sys/netinet/udp_usrreq.c:udp_ctlinput()
  as they are no longer needed.
- move handling of redirects and host dead from in_pcbnotify() to
  udp_ctlinput() and tcp_ctlinput(), so they will call
  in_pcbnotifyall() to notify all sessions with the specific
  remote address.

Approved by:	jlemon
Inspired by:    NetBSD
2001-02-22 21:23:45 +00:00
Robert Watson
91421ba234 o Move per-process jail pointer (p->pr_prison) to inside of the subject
credential structure, ucred (cr->cr_prison).
o Allow jail inheritence to be a function of credential inheritence.
o Abstract prison structure reference counting behind pr_hold() and
  pr_free(), invoked by the similarly named credential reference
  management functions, removing this code from per-ABI fork/exit code.
o Modify various jail() functions to use struct ucred arguments instead
  of struct proc arguments.
o Introduce jailed() function to determine if a credential is jailed,
  rather than directly checking pointers all over the place.
o Convert PRISON_CHECK() macro to prison_check() function.
o Move jail() function prototypes to jail.h.
o Emulate the P_JAILED flag in fill_kinfo_proc() and no longer set the
  flag in the process flags field itself.
o Eliminate that "const" qualifier from suser/p_can/etc to reflect
  mutex use.

Notes:

o Some further cleanup of the linux/jail code is still required.
o It's now possible to consider resolving some of the process vs
  credential based permission checking confusion in the socket code.
o Mutex protection of struct prison is still not present, and is
  required to protect the reference count plus some fields in the
  structure.

Reviewed by:	freebsd-arch
Obtained from:	TrustedBSD Project
2001-02-21 06:39:57 +00:00
Jesper Skriver
c2221099a9 Remove unneeded loop increment in src/sys/netinet/in_pcb.c:in_pcbnotify
Forgotten by phk, when committing fix in kern/23986

PR:		kern/23986
Reviewed by:	phk
Approved by:	phk
2001-02-20 21:11:29 +00:00
Poul-Henning Kamp
37d4006626 Another round of the <sys/queue.h> FOREACH transmogriffer.
Created with:   sed(1)
Reviewed by:    md5(1)
2001-02-04 16:08:18 +00:00
Poul-Henning Kamp
fc2ffbe604 Mechanical change to use <sys/queue.h> macro API instead of
fondling implementation details.

Created with: sed(1)
Reviewed by: md5(1)
2001-02-04 13:13:25 +00:00
Wes Peters
550b151850 When attempting to bind to an ephemeral port, if no such port is
available, the error return should be EADDRNOTAVAIL rather than
EAGAIN.

PR:		14181
Submitted by:	Dima Dorfman <dima@unixfreak.org>
Reviewed by:	Garrett Wollman <wollman@khavrinen.lcs.mit.edu>
2001-01-23 07:27:56 +00:00
Dag-Erling Smørgrav
a3ea6d41b9 First step towards an MP-safe zone allocator:
- have zalloc() and zfree() always lock the vm_zone.
 - remove zalloci() and zfreei(), which are now redundant.

Reviewed by:	bmilekic, jasone
2001-01-21 22:23:11 +00:00
Assar Westerlund
598ce68dbd include tcp header files to get the prototype for tcp_seq_vs_sess 2000-12-27 03:02:29 +00:00
Poul-Henning Kamp
442fad6798 Update the "icmp_admin_prohib_like_rst" code to check the tcp-window and
to be configurable with respect to acting only in SYN or in all TCP states.

PR:		23665
Submitted by:	Jesper Skriver <jesper@skriver.dk>
2000-12-24 10:57:21 +00:00
David Malone
7cc0979fd6 Convert more malloc+bzero to malloc+M_ZERO.
Submitted by:	josh@zipperup.org
Submitted by:	Robert Drehmel <robd@gmx.net>
2000-12-08 21:51:06 +00:00
Poul-Henning Kamp
e4bdf25dc8 Properly jail UDP sockets. This is quite a bit more tricky than TCP.
This fixes a !root userland panic, and some cases where the wrong
interface was chosen for a jailed UDP socket.

PR:		20167, 19839, 20946
2000-09-17 13:35:42 +00:00
Jayanth Vijayaraghavan
e7f3269307 When a connection is being dropped due to a listen queue overflow,
delete the cloned route that is associated with the connection.
This does not exhaust the routing table memory when the system
is under a SYN flood attack. The route entry is not deleted if there
is any prior information cached in it.

Reviewed by: Peter Wemm,asmodai
2000-07-21 23:26:37 +00:00
Jun-ichiro itojun Hagino
686cdd19b1 sync with kame tree as of july00. tons of bug fixes/improvements.
API changes:
- additional IPv6 ioctls
- IPsec PF_KEY API was changed, it is mandatory to upgrade setkey(8).
  (also syntax change)
2000-07-04 16:35:15 +00:00
Poul-Henning Kamp
77978ab8bc Previous commit changing SYSCTL_HANDLER_ARGS violated KNF.
Pointed out by:	bde
2000-07-04 11:25:35 +00:00
Poul-Henning Kamp
82d9ae4e32 Style police catches up with rev 1.26 of src/sys/sys/sysctl.h:
Sanitize SYSCTL_HANDLER_ARGS so that simplistic tools can grog our
sources:

        -sysctl_vm_zone SYSCTL_HANDLER_ARGS
        +sysctl_vm_zone (SYSCTL_HANDLER_ARGS)
2000-07-03 09:35:31 +00:00
Peter Wemm
ff079ca4b1 Return ECONNRESET instead of EINVAL if the connection has been shot
down as a result of a reset.  Returning EINVAL in that case makes no
sense at all and just confuses people as to what happened.  It could be
argued that we should save the original address somewhere so that
getsockname() etc can tell us what it used to be so we know where the
problem connection attempts are coming from.
2000-05-19 00:55:21 +00:00
Paul Saab
75daea9395 Try and make the kernel build again without INET6. 2000-04-02 03:49:25 +00:00
Yoshinobu Inoue
fdaf052eb3 Support per socket based IPv4 mapped IPv6 addr enable/disable control.
Submitted by: ume
2000-04-01 22:35:47 +00:00
Brian Feldman
333aa64d05 in6_pcb.c:
Remove a bogus (redundant, just weird, etc.) key_freeso(so).
	There are no consumers of it now, nor does it seem there
	ever will be.

in6?_pcb.c:
	Add an if (inp->in6?p_sp != NULL) before the call to
	ipsec[46]_delete_pcbpolicy(inp).  In low-memory conditions
	this can cause a crash because in6?_sp can be NULL...
2000-03-22 02:27:30 +00:00
Yoshinobu Inoue
6a800098cc IPSEC support in the kernel.
pr_input() routines prototype is also changed to support IPSEC and IPV6
chained protocol headers.

Reviewed by: freebsd-arch, cvs-committers
Obtained from: KAME project
1999-12-22 19:13:38 +00:00
Eivind Eklund
369dc8ceb8 Change incorrect NULLs to 0s 1999-12-21 11:14:12 +00:00
Yoshinobu Inoue
cfa1ca9dfa udp IPv6 support, IPv6/IPv4 tunneling support in kernel,
packet divert at kernel for IPv6/IPv4 translater daemon

This includes queue related patch submitted by jburkhol@home.com.

Submitted by: queue related patch from jburkhol@home.com
Reviewed by: freebsd-arch, cvs-committers
Obtained from: KAME project
1999-12-07 17:39:16 +00:00
Yoshinobu Inoue
82cd038d51 KAME netinet6 basic part(no IPsec,no V6 Multicast Forwarding, no UDP/TCP
for IPv6 yet)

With this patch, you can assigne IPv6 addr automatically, and can reply to
IPv6 ping.

Reviewed by: freebsd-arch, cvs-committers
Obtained from: KAME project
1999-11-22 02:45:11 +00:00
Yoshinobu Inoue
76429de41a KAME related header files additions and merges.
(only those which don't affect c source files so much)

Reviewed by: cvs-committers
Obtained from: KAME project
1999-11-05 14:41:39 +00:00
Brian Feldman
2f9a21326c Change so_cred's type to a ucred, not a pcred. THis makes more sense, actually.
Make a sonewconn3() which takes an extra argument (proc) so new sockets created
with sonewconn() from a user's system call get the correct credentials, not
just the parent's credentials.
1999-09-19 02:17:02 +00:00
Peter Wemm
c3aac50f28 $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
Brian Feldman
24ad8fe519 Correct a mistake in so_cred changes. In practice, I don't think that it
would make a difference. However, my previous diff _did_ change the
behavior in some way (not necessarily break it), so I'm fixing it.

Found by:	bde
Submitted by:	bde
1999-07-12 18:58:23 +00:00
Pierre Beyssac
5a903f8d73 In in_pcbconnect(), check the return value from in_pcbbind() and
exit on errors.

If we don't, in_pcbrehash() is called without a preceeding
in_pcbinshash(), causing a crash.

There are apparently several conditions that could cause the crash;
PR misc/12256 is only one of these.

PR:		misc/12256
1999-06-25 23:46:47 +00:00
Brian Feldman
f29be02190 Reviewed by: the cast of thousands
This is the change to struct sockets that gets rid of so_uid and replaces
it with a much more useful struct pcred *so_cred. This is here to be able
to do socket-level credential checks (i.e. IPFW uid/gid support, to be added
to HEAD soon). Along with this comes an update to pidentd which greatly
simplifies the code necessary to get a uid from a socket. Soon to come:
a sysctl() interface to finding individual sockets' credentials.
1999-06-17 23:54:50 +00:00
Poul-Henning Kamp
75c1354190 This Implements the mumbled about "Jail" feature.
This is a seriously beefed up chroot kind of thing.  The process
is jailed along the same lines as a chroot does it, but with
additional tough restrictions imposed on what the superuser can do.

For all I know, it is safe to hand over the root bit inside a
prison to the customer living in that prison, this is what
it was developed for in fact:  "real virtual servers".

Each prison has an ip number associated with it, which all IP
communications will be coerced to use and each prison has its own
hostname.

Needless to say, you need more RAM this way, but the advantage is
that each customer can run their own particular version of apache
and not stomp on the toes of their neighbors.

It generally does what one would expect, but setting up a jail
still takes a little knowledge.

A few notes:

   I have no scripts for setting up a jail, don't ask me for them.

   The IP number should be an alias on one of the interfaces.

   mount a /proc in each jail, it will make ps more useable.

   /proc/<pid>/status tells the hostname of the prison for
   jailed processes.

   Quotas are only sensible if you have a mountpoint per prison.

   There are no privisions for stopping resource-hogging.

   Some "#ifdef INET" and similar may be missing (send patches!)

If somebody wants to take it from here and develop it into
more of a "virtual machine" they should be most welcome!

Tools, comments, patches & documentation most welcome.

Have fun...

Sponsored by:   http://www.rndassociates.com/
Run for almost a year by:       http://www.servetheweb.com/
1999-04-28 11:38:52 +00:00
Poul-Henning Kamp
f711d546d2 Suser() simplification:
1:
  s/suser/suser_xxx/

2:
  Add new function: suser(struct proc *), prototyped in <sys/proc.h>.

3:
  s/suser_xxx(\([a-zA-Z0-9_]*\)->p_ucred, \&\1->p_acflag)/suser(\1)/

The remaining suser_xxx() calls will be scrutinized and dealt with
later.

There may be some unneeded #include <sys/cred.h>, but they are left
as an exercise for Bruce.

More changes to the suser() API will come along with the "jail" code.
1999-04-27 11:18:52 +00:00
Matthew Dillon
831a80b0d5 Fix warnings in preparation for adding -Wall -Wcast-qual to the
kernel compile
1999-01-27 22:42:27 +00:00
Archie Cobbs
f1d19042b0 The "easy" fixes for compiling the kernel -Wunused: remove unreferenced static
and local variables, goto labels, and functions declared but not defined.
1998-12-07 21:58:50 +00:00
Bill Fenner
52b65dbe85 Fix the bind security fix introduced in rev 1.38 to work with multicast:
- Don't bother checking for conflicting sockets if we're binding to a
  multicast address.
- Don't return an error if we're binding to INADDR_ANY, the conflicting
  socket is bound to INADDR_ANY, and the conflicting socket has SO_REUSEPORT
  set.

PR:		kern/7713
1998-09-17 18:42:16 +00:00
Garrett Wollman
98271db4d5 Convert socket structures to be type-stable and add a version number.
Define a parameter which indicates the maximum number of sockets in a
system, and use this to size the zone allocators used for sockets and
for certain PCBs.

Convert PF_LOCAL PCB structures to be type-stable and add a version number.

Define an external format for infomation about socket structures and use
it in several places.

Define a mechanism to get all PF_LOCAL and PF_INET PCB lists through
sysctl(3) without blocking network interrupts for an unreasonable
length of time.  This probably still has some bugs and/or race
conditions, but it seems to work well enough on my machines.

It is now possible for `netstat' to get almost all of its information
via the sysctl(3) interface rather than reading kmem (changes to follow).
1998-05-15 20:11:40 +00:00
Poul-Henning Kamp
4565cbea29 According to:
ftp://ftp.isi.edu/in-notes/iana/assignments/port-numbers

port numbers are divided into three ranges:

	    0 -  1023 Well Known Ports
	 1024 - 49151 Registered Ports
	49152 - 65535 Dynamic and/or Private Ports

This patch changes the "local port range" from 40000-44999
to the range shown above (plus fix the comment in in_pcb.c).

WARNING: This may have an impact on firewall configurations!

PR:		5402
Reviewed by:	phk
Submitted by:	Stephen J. Roznowski <sjr@home.net>
1998-04-19 17:22:30 +00:00
Bruce Evans
08637435f2 Moved some #includes from <sys/param.h> nearer to where they are actually
used.
1998-03-28 10:33:27 +00:00
Bruce Evans
8781d8e928 Fixed style bugs (mostly) in previous commit. 1998-03-28 10:18:26 +00:00
Garrett Wollman
3d4d47f398 Use the zone allocator to allocate inpcbs and tcpcbs. Each protocol creates
its own zone; this is used particularly by TCP which allocates both inpcb and
tcpcb in a single allocation.  (Some hackery ensures that the tcpcb is
reasonably aligned.)  Also keep track of the number of pcbs of each type
allocated, and keep a generation count (instance version number) for future
use.
1998-03-24 18:06:34 +00:00
Guido van Rooij
4049a04253 Make sure that you can only bind a more specific address when it is
done by the same uid.
Obtained from: OpenBSD
1998-03-01 19:39:29 +00:00
David Greenman
c3229e05a3 Improved connection establishment performance by doing local port lookups via
a hashed port list. In the new scheme, in_pcblookup() goes away and is
replaced by a new routine, in_pcblookup_local() for doing the local port
check. Note that this implementation is space inefficient in that the PCB
struct is now too large to fit into 128 bytes. I might deal with this in the
future by using the new zone allocator, but I wanted these changes to be
extensively tested in their current form first.

Also:
1) Fixed off-by-one errors in the port lookup loops in in_pcbbind().
2) Got rid of some unneeded rehashing. Adding a new routine, in_pcbinshash()
   to do the initialial hash insertion.
3) Renamed in_pcblookuphash() to in_pcblookup_hash() for easier readability.
4) Added a new routine, in_pcbremlists() to remove the PCB from the various
   hash lists.
5) Added/deleted comments where appropriate.
6) Removed unnecessary splnet() locking. In general, the PCB functions should
   be called at splnet()...there are unfortunately a few exceptions, however.
7) Reorganized a few structs for better cache line behavior.
8) Killed my TCP_ACK_HACK kludge. It may come back in a different form in
   the future, however.

These changes have been tested on wcarchive for more than a month. In tests
done here, connection establishment overhead is reduced by more than 50
times, thus getting rid of one of the major networking scalability problems.

Still to do: make tcp_fastimo/tcp_slowtimo scale well for systems with a
large number of connections. tcp_fastimo is easy; tcp_slowtimo is difficult.

WARNING: Anything that knows about inpcb and tcpcb structs will have to be
         recompiled; at the very least, this includes netstat(1).
1998-01-27 09:15:13 +00:00
David Greenman
42fa505b7e The spl fixes in in_setsockaddr and in_setpeeraddr that were meant to
fix PR#3618 weren't sufficient since malloc() can block - allowing the
net interrupts in and leading to the same problem mentioned in the
PR (a panic). The order of operations has been changed so that this
is no longer a problem.
Needs to be brought into the 2.2.x branch.
PR:		3618
1997-12-25 06:57:36 +00:00
Alexander Langer
90d0144c05 Removed unnecessary setting of 'error' -- binding to a privileged port
by a non-root user always returns EACCES.
1997-12-23 01:40:40 +00:00
Bruce Evans
55b211e3af Removed unused #includes. 1997-10-28 15:59:26 +00:00
Garrett Wollman
57bf258e3d Fix all areas of the system (or at least all those in LINT) to avoid storing
socket addresses in mbufs.  (Socket buffers are the one exception.)  A number
of kernel APIs needed to get fixed in order to make this happen.  Also,
fix three protocol families which kept PCBs in mbufs to not malloc them
instead.  Delete some old compatibility cruft while we're at it, and add
some new routines in the in_cksum family.
1997-08-16 19:16:27 +00:00
Tor Egge
fdc984f7b6 Break apart initialization of s and inp from the declarations in
in_setsockaddr and in_setpeeraddr.
Suggested by:	Justin T. Gibbs <gibbs@plutotech.com>
1997-05-19 01:28:39 +00:00
Tor Egge
db112f04dc Disallow network interrupts while the address is found and copied in
in_setsockaddr and in_setpeeraddr.
Handle the case where the socket was disconnected before the network
interrupts were disabled.
Reviewed by:	Garrett Wollman <wollman@khavrinen.lcs.mit.edu>
1997-05-19 00:18:30 +00:00
Garrett Wollman
a29f300e80 The long-awaited mega-massive-network-code- cleanup. Part I.
This commit includes the following changes:
1) Old-style (pr_usrreq()) protocols are no longer supported, the compatibility
glue for them is deleted, and the kernel will panic on boot if any are compiled
in.

2) Certain protocol entry points are modified to take a process structure,
so they they can easily tell whether or not it is possible to sleep, and
also to access credentials.

3) SS_PRIV is no more, and with it goes the SO_PRIVSTATE setsockopt()
call.  Protocols should use the process pointer they are now passed.

4) The PF_LOCAL and PF_ROUTE families have been updated to use the new
style, as has the `raw' skeleton family.

5) PF_LOCAL sockets now obey the process's umask when creating a socket
in the filesystem.

As a result, LINT is now broken.  I'm hoping that some enterprising hacker
with a bit more time will either make the broken bits work (should be
easy for netipx) or dike them out.
1997-04-27 20:01:29 +00:00
David Greenman
ca98b82c8d Reorganize elements of the inpcb struct to take better advantage of
cache lines. Removed the struct ip proto since only a couple of chars
were actually being used in it. Changed the order of compares in the
PCB hash lookup to take advantage of partial cache line fills (on PPro).

Discussed-with: wollman
1997-04-03 05:14:45 +00:00
Bruce Evans
fce002fdef Don't include <sys/ioctl.h> in the kernel. Stage 1: don't include
it when it is not used.  In most cases, the reasons for including it
went away when the special ioctl headers became self-sufficient.
1997-03-24 11:25:10 +00:00
David Greenman
ddd79a9790 Improved performance of hash algorithm while (hopefully) not reducing
the quality of the hash distribution. This does not fix a problem dealing
with poor distribution when using lots of IP aliases and listening
on the same port on every one of them...some other day perhaps; fixing
that requires significant code changes.
The use of xor was inspired by David S. Miller <davem@jenolan.rutgers.edu>
1997-03-03 09:23:37 +00:00
Peter Wemm
6875d25465 Back out part 1 of the MCFH that changed $Id$ to $FreeBSD$. We are not
ready for it yet.
1997-02-22 09:48:43 +00:00
Garrett Wollman
117bcae7c4 Convert raw IP from mondo-switch-statement-from-Hell to
pr_usrreqs.  Collapse duplicates with udp_usrreq.c and
tcp_usrreq.c (calling the generic routines in uipc_socket2.c and
in_pcb.c).  Calling sockaddr()_ or peeraddr() on a detached
socket now traps, rather than harmlessly returning an error; this
should never happen.  Allow the raw IP buffer sizes to be
controlled via sysctl.
1997-02-18 20:46:36 +00:00
Jordan K. Hubbard
1130b656e5 Make the long-awaited change from $Id$ to $FreeBSD$
This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore.  This update would have been
insane otherwise.
1997-01-14 07:20:47 +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
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
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
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
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
Peter Wemm
62d2e87ec1 More closely preserve the original operation of rresvport() when using
IP_PORTRANGE_LOW.
1996-05-31 05:11:22 +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
Peter Wemm
33b3ac0633 Make the default behavior of local port assignment match traditional
systems (my last change did not mix well with some firewall
configurations).  As much as I dislike firewalls, this is one thing I
I was not prepared to break by default.. :-)

Allow the user to nominate one of three ranges of port numbers as
candidates for selecting a local address to replace a zero port number.
The ranges are selected via a setsockopt(s, IPPROTO_IP, IP_PORTRANGE, &arg)
call.  The three ranges are: default, high (to bypass firewalls) and
low (to get a port below 1024).

The default and high port ranges are sysctl settable under sysctl
net.inet.ip.portrange.*

This code also fixes a potential deadlock if the system accidently ran out
of local port addresses. It'd drop into an infinite while loop.

The secure port selection (for root) should reduce overheads and increase
reliability of rlogin/rlogind/rsh/rshd if they are modified to take
advantage of it.

Partly suggested by: pst
Reviewed by: wollman
1996-02-22 21:32:23 +00:00
Peter Wemm
101f9fc846 Change the default local address range for IP from 1024 through 5000
to 20000 through 30000.  These numbers are used for local IP port numbers
when an explicit address is not specified.

The values are sysctl modifiable under: net.inet.ip.port_{first|last}_auto

These numbers do not overlap with any known server addresses, without going
above 32768 which are "negative" on some other implementations.

20000 through 30000 is 2.5 times larger than the old range, but some have
suggested even that may not be enough... (gasp!)  Setting a low address
of 10000 should be plenty.. :-)
1996-01-19 08:00:58 +00:00
Poul-Henning Kamp
0312fbe97d New style sysctl & staticize alot of stuff. 1995-11-14 20:34:56 +00:00
Poul-Henning Kamp
a98ca4699e Second batch of cleanup changes.
This time mostly making a lot of things static and some unused
variables here and there.
1995-10-29 15:33:36 +00:00
Garrett Wollman
2469dd60b7 Merge 4.4-Lite-2: use M_NOWAIT in in_pcballoc(), and return EACCES rather
than EPERM on illegal attempt to bind a reserved port.

Obtained from:	4.4BSD-Lite-2
1995-09-21 17:55:49 +00:00
Rodney W. Grimes
9b2e535452 Remove trailing whitespace. 1995-05-30 08:16:23 +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
7bc4aca7f0 Added splnet protections for PCB list manipulations and traversals. 1995-04-10 08:52:45 +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
David Greenman
2c8fe19f89 pcb allocations are not always done on behalf of a process; it is not
okay to wait.
1995-03-14 21:50:55 +00:00
David Greenman
3dbdc25caa Move exact match pcb's to the head of the list to improve lookup
performance.
1995-03-02 19:29:42 +00:00
Garrett Wollman
41f82abe5a Transaction TCP support now standard. Hack away! 1995-02-16 00:55:44 +00:00
Garrett Wollman
999f1343a5 T/TCP changes to generic IP code. This is all ifdefed TTCP so should
have no effect on most users for now.  (Eventually, once this code is
fully tested, the ifdefs will go away.)
1995-02-08 20:22:09 +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