CVS log for src/sys/netinet/in_pcb.h

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Default branch: MAIN

inpcb: use in_port_t for port numbers

inpcb: rename functions to in6pcb_*

inpcb: rename functions to inpcb_*

Inspired by rmind-smpnet patches.

inpcb: separate inpcb again to reduce the size of PCB for IPv4

The data size of PCB for IPv4 increased because of the merge of
struct in6pcb.  The change decreases the size to the original size by
separating struct inpcb (again).  struct in4pcb and in6pcb that embed
struct inpcb are introduced.

Even after the separation, users don't need to realize the separation
and only have to use some macros to access dedicated data.  For example,
inp->inp_laddr is now accessed through in4p_laddr(inp).

Remove in_pcb_hdr.h

inpcb: integrate data structures of PCB into one

Data structures of network protocol control blocks (PCBs), i.e.,
struct inpcb, in6pcb and inpcb_hdr, are not organized well.  Users of
the data structures have to handle them separately and thus the code
is cluttered and duplicated.

The commit integrates the data structures into one, struct inpcb.  As a
result, users of PCBs only have to handle just one data structure, so
the code becomes simple.

One drawback is that the data size of PCB for IPv4 increases by 40 bytes
(from 248 bytes to 288 bytes).

"inp_hash" is not used now.

Add IP_BINDANY, IPV6_BINDANY which can be used to bind to any address in
order to implement transparent proxies.

netinet: Include the needful so include order doesn't matter.

[ozaki-r] Changes to the kernel core for wireguard

Sync with HEAD

Remove support for non-IKE markers in the kernel. Discussed on tech-net@,
and now in PR/53334. Basically non-IKE markers come from a deprecated
draft, and our kernel code for them has never worked.

Setsockopt will now reject UDP_ENCAP_ESPINUDP_NON_IKE.

Perhaps we should also add a check in key_handle_natt_info(), to make
sure we also reject UDP_ENCAP_ESPINUDP_NON_IKE in the SADB.

Pull up following revision(s) (requested by tih in ticket #639):
	sys/kern/uipc_socket.c: revision 1.258
	sys/kern/uipc_socket.c: revision 1.259
	sys/netinet/ip_input.c: revision 1.364 (via patch)
	sys/netinet/ip_output.c: revision 1.289
	sys/netinet/in.h: revision 1.102
	sys/netinet/in_pcb.c: revision 1.181
	share/man/man9/sockopt.9: revision 1.11
	sys/netinet/in_pcb.h: revision 1.65
	sys/sys/socketvar.h: revision 1.146
	sys/kern/uipc_syscalls.c: revision 1.189
	sys/netinet/ip_output.c: revision 1.290
	share/man/man4/ip.4: revision 1.41
	share/man/man4/ip.4: revision 1.42
	sys/kern/uipc_syscalls.c: revision 1.190

pass valsize for getsockopt like we do for setsockopt
make sure that we have enough space, don't require the exact size
(Tom Ivar Helbekkmo)

1) "#define ipi_spec_dst ipi_addr" in <netinet/in.h>
2) Change the IP_RECVPKTINFO option to control the generation of
   IP_PKTINFO control messages, the way it's done in Solaris.
3) Remove the superfluous IP_RECVPKTINFO control message.
4) Change the IP_PKTINFO option to do different things depending on
   the parameter it's supplied with:
   - If it's sizeof(int), assume it's being used as in Linux:
     - If it's non-zero, turn on the IP_RECVPKTINFO option.
     - If it's zero, turn off the IP_RECVPKTINFO option.
   - If it's sizeof(struct in_pktinfo), assume it's being used as in
     Solaris, to set a default for the source interface and/or
     source address for outgoing packets on the socket.
5) Return what Linux or Solaris compatible code expects, depending
   on data size, and just added a fallback to a Linux (and current NetBSD)
   compatible value if the size is unknown (as it is now), or,
   in the future, if the calling application specifies a receiving
   buffer that doesn't match either data item.

From: Tom Ivar Helbekkmo

new sentence-new line

Remove comment now that the getsockopt code passes the size.

Add a new sockopt member to keep track of the actual size of the option
that should be returned to the caller in getsockopt(2).
(Tom Ivar Helbekkmo)

1) "#define ipi_spec_dst ipi_addr" in <netinet/in.h>
2) Change the IP_RECVPKTINFO option to control the generation of
   IP_PKTINFO control messages, the way it's done in Solaris.
3) Remove the superfluous IP_RECVPKTINFO control message.
4) Change the IP_PKTINFO option to do different things depending on
   the parameter it's supplied with:
   - If it's sizeof(int), assume it's being used as in Linux:
     - If it's non-zero, turn on the IP_RECVPKTINFO option.
     - If it's zero, turn off the IP_RECVPKTINFO option.
   - If it's sizeof(struct in_pktinfo), assume it's being used as in
     Solaris, to set a default for the source interface and/or
     source address for outgoing packets on the socket.
5) Return what Linux or Solaris compatible code expects, depending
   on data size, and just added a fallback to a Linux (and current NetBSD)
   compatible value if the size is unknown (as it is now), or,
   in the future, if the calling application specifies a receiving
   buffer that doesn't match either data item.

From: Tom Ivar Helbekkmo

Pull up following revision(s) (requested by ryo in ticket #445):
	distrib/sets/lists/debug/mi: revision 1.222
	distrib/sets/lists/tests/mi: revision 1.760
	share/man/man4/ip.4: revision 1.38
	sys/netinet/in.c: revision 1.207
	sys/netinet/in.h: revision 1.101
	sys/netinet/in_pcb.c: revision 1.179
	sys/netinet/in_pcb.h: revision 1.64
	sys/netinet/ip_output.c: revision 1.284, 1.286
	sys/netinet/ip_var.h: revision 1.120-1.121
	sys/netinet/raw_ip.c: revision 1.166-1.167
	sys/netinet/udp_usrreq.c: revision 1.235-1.236
	sys/netinet/udp_var.h: revision 1.42
	tests/net/net/Makefile: revision 1.21
	tests/net/net/t_pktinfo_send.c: revision 1.1-1.2
Add support IP_PKTINFO for sendmsg(2).
The source address or output interface can be specified by adding IP_PKTINFO
to the control part of the message on a SOCK_DGRAM or SOCK_RAW socket.
Reviewed by ozaki-r@ and christos@. thanks.
--
As is the case with IPV6_PKTINFO, IP_PKTINFO can be sent without EADDRINUSE
even if the UDP address:port in use is specified.

update from HEAD

Sync with HEAD

Add support IP_PKTINFO for sendmsg(2).

The source address or output interface can be specified by adding IP_PKTINFO
to the control part of the message on a SOCK_DGRAM or SOCK_RAW socket.

Reviewed by ozaki-r@ and christos@. thanks.

Sync with HEAD

Sync with HEAD

Make sure imo_membership is protected by inp's lock (solock)

Add assertions and comments for lock states of socket and pcb

Sync with HEAD

Sync with HEAD.  (Note that most of these changes are simply $NetBSD$
tag issues.)

Add rtcache_unref to release points of rtentry stemming from rtcache

In the MP-safe world, a rtentry stemming from a rtcache can be freed at any
points. So we need to protect rtentries somehow say by reference couting or
passive references. Regardless of the method, we need to call some release
function of a rtentry after using it.

The change adds a new function rtcache_unref to release a rtentry. At this
point, this function does nothing because for now we don't add a reference
to a rtentry when we get one from a rtcache. We will add something useful
in a further commit.

This change is a part of changes for MP-safe routing table. It is separated
to avoid one big change that makes difficult to debug by bisecting.

Sync with HEAD

Sweep unnecessary route.h inclusions

Sync with HEAD

remove transitional functions in{,6}_pcbconnect_m() that were used in
converting protocol user requests to accept sockaddr instead of mbufs.

remove tcp_input copy in to mbuf from sockaddr and just copy to sockaddr
to make it possible for the transitional functions to go away.

no version bump since these functions only existed for a short time and
were commented as adapters (they appeared in 7.99.15).

make connect syscall use sockaddr_big and modify pr_{send,connect}
nam parameter type from buf * to sockaddr *.

final commit for parameter type changes to protocol user requests

* bump kernel version to 7.99.15 for parameter type changes to pr_{send,connect}

make accept, getsockname and getpeername syscalls use sockaddr_big and modify
pr_{accept,sockname,peername} nam parameter type from mbuf * to sockaddr *.

* retained use of mbuftypes[MT_SONAME] for now.
* bump to netbsd version 7.99.12 for parameter type change.

patch posted to tech-net@ 2015/04/19

Sync with HEAD

* change pr_bind to accept struct sockaddr * instead of struct mbuf *
* update protocol bind implementations to use/expect sockaddr *
  instead of mbuf *
* introduce sockaddr_big struct for storage of addr data passed via
  sys_bind; sockaddr_big is of sufficient size and alignment to
  accommodate all addr data sizes received.
* modify sys_bind to allocate sockaddr_big instead of using an mbuf.
* bump kernel version to 7.99.9 for change to pr_bind() parameter type.

Patch posted to tech-net@
  http://mail-index.netbsd.org/tech-net/2015/03/15/msg005004.html

The choice to use a new structure sockaddr_big has been retained since
changing sockaddr_storage size would lead to unnecessary ABI change. The
use of the new structure does not preclude future work that increases
the size of sockaddr_storage and at that time sockaddr_big may be
trivially replaced.

Tested by mrg@ and myself, discussed with rmind@, posted to tech-net@

Clean up any dangling ifp references in (struct in6pcb *)->in6p_v4moptions
(v4 multicast options off v4 mapped v6 socket) on interface destruction.  The
code to clean this up in a true v4 socket was moved to its own function
which is now also called in the corresponding place for v6 sockets on
interface destruction.

Rebase to HEAD as of a few days ago.

Rebase.

revert the removal of struct lwp * parameter from bind, listen and connect
user requests.

this should resolve the issue relating to nfs client hangs presented
recently by wiz on current-users@

split PRU_BIND and PRU_LISTEN function out of pr_generic() usrreq
switches and put into separate functions
  xxx_bind(struct socket *, struct mbuf *)
  xxx_listen(struct socket *)

  - always KASSERT(solocked(so)) even if not implemented

  - replace calls to pr_generic() with req = PRU_BIND with call to
    pr_bind()

  - replace calls to pr_generic() with req = PRU_LISTEN with call to
    pr_listen()

  - drop struct lwp * parameter from at_pcbsetaddr(), in_pcbbind() and
    unp_bind() and always use curlwp.

rename existing functions that operate on PCB for consistency (and to
free up their names for xxx_{bind,listen}() PRUs

  - l2cap_{bind,listen}() -> l2cap_{bind,listen}_pcb()
  - sco_{bind,listen}() -> sco_{bind,listen}_pcb()
  - rfcomm_{bind,listen}() -> rfcomm_{bind,listen}_pcb()

patch reviewed by rmind

welcome to netbsd 6.99.48

- Add in_init() and move some functions, variables and sysctls into in.c
  where they belong to.  Make some functions and variables static.
- ip_input.c: reduce some #ifdefs, cleanup a little.
- Move some sysctls into ip_flow.c as they belong there.

No functional change.

sync with head.

for a reference, the tree before this commit was tagged
as yamt-pagecache-tag8.

this commit was splitted into small chunks to avoid
a limitation of cvs.  ("Protocol error: too many arguments")

sync with head

- Add some initial locking to the IPv4 PCB.
- Rename inpcb_lookup_*() routines to be more accurate and add comments.
- Add some comments about connection life-cycle WRT socket layer.

Checkpoint work in progress:
- Move PCB structures under __INPCB_PRIVATE, adjust most of the callers
  and thus make IPv4 PCB structures mostly opaque.  Any volunteers for
  merging in6pcb with inpcb (see rpaulo-netinet-merge-pcb branch)?
- Move various global vars to the modules where they belong, make them static.
- Some preliminary work for IPv4 PCB locking scheme.
- Make raw IP code mostly MP-safe.  Simplify some of it.
- Rework "fast" IP forwarding (ipflow) code to be mostly MP-safe.  It should
  run from a software interrupt, rather than hard.
- Rework tun(4) pseudo interface to be MP-safe.
- Work towards making some other interfaces more strict.

implement IP_PKTINFO and IP_RECVPKTINFO.

sync with head

rename rfc6056 -> portalgo, requested by yamt

Add inet4 part of the rfc6056 code contributed by Vlad Balan as part of
Google SoC-2011

Sync with HEAD.

sync with head

Reduces the resources demanded by TCP sessions in TIME_WAIT-state using
methods called Vestigial Time-Wait (VTW) and Maximum Segment Lifetime
Truncation (MSLT).

MSLT and VTW were contributed by Coyote Point Systems, Inc.

Even after a TCP session enters the TIME_WAIT state, its corresponding
socket and protocol control blocks (PCBs) stick around until the TCP
Maximum Segment Lifetime (MSL) expires.  On a host whose workload
necessarily creates and closes down many TCP sockets, the sockets & PCBs
for TCP sessions in TIME_WAIT state amount to many megabytes of dead
weight in RAM.

Maximum Segment Lifetimes Truncation (MSLT) assigns each TCP session to
a class based on the nearness of the peer.  Corresponding to each class
is an MSL, and a session uses the MSL of its class.  The classes are
loopback (local host equals remote host), local (local host and remote
host are on the same link/subnet), and remote (local host and remote
host communicate via one or more gateways).  Classes corresponding to
nearer peers have lower MSLs by default: 2 seconds for loopback, 10
seconds for local, 60 seconds for remote.  Loopback and local sessions
expire more quickly when MSLT is used.

Vestigial Time-Wait (VTW) replaces a TIME_WAIT session's PCB/socket
dead weight with a compact representation of the session, called a
"vestigial PCB".  VTW data structures are designed to be very fast and
memory-efficient: for fast insertion and lookup of vestigial PCBs,
the PCBs are stored in a hash table that is designed to minimize the
number of cacheline visits per lookup/insertion.  The memory both
for vestigial PCBs and for elements of the PCB hashtable come from
fixed-size pools, and linked data structures exploit this to conserve
memory by representing references with a narrow index/offset from the
start of a pool instead of a pointer.  When space for new vestigial PCBs
runs out, VTW makes room by discarding old vestigial PCBs, oldest first.
VTW cooperates with MSLT.

It may help to think of VTW as a "FIN cache" by analogy to the SYN
cache.

A 2.8-GHz Pentium 4 running a test workload that creates TIME_WAIT
sessions as fast as it can is approximately 17% idle when VTW is active
versus 0% idle when VTW is inactive.  It has 103 megabytes more free RAM
when VTW is active (approximately 64k vestigial PCBs are created) than
when it is inactive.

sync with head.

Sync with HEAD.

sync with head.

Add the IP_MINTTL socket option.

The IP_MINTTL option may be used on SOCK_STREAM sockets to discard
packets with a TTL lower than the option value.  This can be used to
implement the Generalized TTL Security Mechanism (GTSM) according to
RFC 3682.

OK'ed by christos@.

Add the IP_RECVTTL option support.

If the IP_RECVTTL option is enabled on a SOCK_DGRAM socket, the
recvmsg(2) call will return the TTL of the received datagram.  The
msg_control field in the msghdr structure points to a buffer that
contains a cmsghdr structure followed by the TTL value.

Modeled after FreeBSD implementation.

Sync with head.

Oops. Remove kauth.h inclusion.

Pointed out by gdt@, thanks.

Really fix low port allocation, by always passing a valid lwp to
in_pcbbind().

Okay dyoung@.

Note that the network code is another candidate for major cleanup... also
note that this issue is likely to be present in netinet6 code, too.

sync with HEAD

sync with head.

Sync with head.

Sync with HEAD.

1) Introduce a new socket option, (SOL_SOCKET, SO_NOHEADER), that
   tells a socket that it should both add a protocol header to tx'd
   datagrams and remove the header from rx'd datagrams:

        int onoff = 1, s = socket(...);
        setsockopt(s, SOL_SOCKET, SO_NOHEADER, &onoff);

2) Add an implementation of (SOL_SOCKET, SO_NOHEADER) for raw IPv4
   sockets.

3) Reorganize the protocols' pr_ctloutput implementations a bit.
   Consistently return ENOPROTOOPT when an option is unsupported,
   and EINVAL if a supported option's arguments are incorrect.
   Reorganize the flow of code so that it's more clear how/when
   options are passed down the stack until they are handled.

   Shorten some pr_ctloutput staircases for readability.

4) Extract common mbuf code into subroutines, add new sockaddr
   methods, and introduce a new subroutine, fsocreate(), for reuse
   later; use it first in sys_socket():

struct mbuf *m_getsombuf(struct socket *so)

        Create an mbuf and make its owner the socket `so'.

struct mbuf *m_intopt(struct socket *so, int val)

        Create an mbuf, make its owner the socket `so', put the
        int `val' into it, and set its length to sizeof(int).


int fsocreate(..., int *fd)

        Create a socket, a la socreate(9), put the socket into the
        given LWP's descriptor table, return the descriptor at `fd'
        on success.

void *sockaddr_addr(struct sockaddr *sa, socklen_t *slenp)
const void *sockaddr_const_addr(const struct sockaddr *sa, socklen_t *slenp)

        Extract a pointer to the address part of a sockaddr.  Write
        the length of the address  part at `slenp', if `slenp' is
        not NULL.

socklen_t sockaddr_getlen(const struct sockaddr *sa)

        Return the length of a sockaddr.  This just evaluates to
        sa->sa_len.  I only add this for consistency with code that
        appears in a portable userland library that I am going to
        import.

const struct sockaddr *sockaddr_any(const struct sockaddr *sa)

        Return the "don't care" sockaddr in the same family as
        `sa'.  This is the address a client should sobind(9) if it
        does not care the source address and, if applicable, the
        port et cetera that it uses.

const void *sockaddr_anyaddr(const struct sockaddr *sa, socklen_t *slenp)

        Return the "don't care" sockaddr in the same family as
        `sa'.  This is the address a client should sobind(9) if it
        does not care the source address and, if applicable, the
        port et cetera that it uses.

sync with head.

sync with head

sync with head

Use the LWP cached credentials where sane.

sync with head.

* move IN6_HASH() to ifdef INET6
* introduce INP_SOCKAF() from FreeBSD
* add IN{,6}PCBHASH_{CONNECT,PORT,BIND} from in6_pcb.c and in_pcb.c

Add FreeBSD's locking defines (currently defined to nothing) and a
'struct lock' inside 'struct inpcb'.

Fix wrong indentation.

Remove 'inp_options' and 'in6p_options' define.

struct mbuf can be shared between in4p_depend and in6p_depend.

Add IN6P_{ATTACHED,BOUND,CONNECTED} for KAME src compatibility.

Merge in6pcb with inpcb and remove inpcb_hdr since that's no longer needed.

Sync with head.

Multiple inclusion protection, as suggested by christos@ on tech-kern@
few days ago.

sync with head.

Pass the current process structure to in_pcbconnect() so that it can
pass it to in_pcbbind() so that can allocate a low numbered port
if setsockopt() has been used to set IP_PORTRANGE to IP_PORTRANGE_LOW.
While there, fail in_pcbconnect() if the in_pcbbind() fails - rather
than sending the request out from a port of zero.
This has been largely broken since the socket option was added in 1998.

sync with -current

Sync with HEAD.

sync with head.

Add support for IPsec Network Address Translator traversal (NAT-T), as
described by RFC 3947 and 3948.

Fix the sync with head I botched.

Sync with HEAD.

Sync with HEAD

no space between function name and paren: foo (blah) -> foo(blah)

De __P()

Remove all the code to maintain ia_inpcbs.  This information was only used to
close sockets on address changes, which was deemed to be a bad idea and was
summarily removed, so there is no point in wasting effort on maintaining it
any more.

revamp inpcb/in6pcb so that they are more aligned with each other.
in6pcb lookup now uses hash(9).

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

Change the way multicasts are kept.  They now use a hash table in the same
manner as the ifaddr hash table.  By doing this, the mkludge code can go
away.  At the same time, keep track of what pcbs are using what ifaddr and
when an address is deleted from an interface, notify/abort all sockets
that have that address as a source.  Switch IGMP and multicasts to use pools
for allocation.  Fix a number of potential problems in the igmp code where
allocation failures could cause a trap/panic.

Catch up to -current

cleanup ipsec.h dependency.  commented by perry, sync w/kame

catch up with -current on kqueue branch

catch up with -current.

Catch up to -current.

whitespace

Catch up with -current.

on interface removal, remove multicast groups joined from pcb, before
removing interface addresses.  without the change, we may deref
NULL pointer in in_pcbpurgeif().  from jinmei@kame, sync with kame

Update thorpej_scsipi to -current as of a month ago

PRU_PURGEADDR -> PRU_PURGEIF, per a discussion w/ itojun.  In the IPv4
and IPv6 code, also use this to traverse PCB tables, looking for cached
routes referencing the dying ifnet, forcing them to be refreshed.

bring in latest KAME ipsec tree.
- interop issues in ipcomp is fixed
- padding type (after ESP) is configurable
- key database memory management (need more fixes)
- policy specification is revisited

XXX m->m_pkthdr.rcvif is still overloaded - hope to fix it soon

bring in latest KAME (as of 19991130, KAME/NetBSD141) into kame branch
just for reference purposes.
This commit includes 1.4 -> 1.4.1 sync for kame branch.

The branch does not compile at all (due to the lack of ALTQ and some other
source code).  Please do not try to modify the branch, this is just for
referenre purposes.

synchronization to latest KAME will take place on HEAD branch soon.

Sync w/ -current.

IPv6 kernel code, based on KAME/NetBSD 1.4, SNAP kit 19990628.
(Sorry for a big commit, I can't separate this into several pieces...)
Pls check sys/netinet6/TODO and sys/netinet6/IMPLEMENTATION for details.

- sys/kern: do not assume single mbuf, accept chained mbuf on passing
  data from userland to kernel (or other way round).
- "midway" ATM card: ATM PVC pseudo device support, like those done in ALTQ
  package (ftp://ftp.csl.sony.co.jp/pub/kjc/).
- sys/netinet/tcp*: IPv4/v6 dual stack tcp support.
- sys/netinet/{ip6,icmp6}.h, sys/net/pfkeyv2.h: IETF document assumes those
  file to be there so we patch it up.
- sys/netinet: IPsec additions are here and there.
- sys/netinet6/*: most of IPv6 code sits here.
- sys/netkey: IPsec key management code
- dev/pci/pcidevs: regen

In my understanding no code here is subject to export control so it
should be safe.

KAME/NetBSD 1.4 SNAP kit, dated 19990628.

NOTE: this branch (kame) is used just for refernce.  this may not compile
due to multiple reasons.

* in_pcblookup_port(): deprecate INPLOOKUP_WILDCARD and flags in favour
  of a lookup_wildcard arg; simplifies the logic a bit.
* when assigning ephemeral ports in in_pcbbind(), always call
  in_pcblookup_port() with lookup_wildcard=1, so that ephemeral port
  allocation on sockets with SO_REUSEADDR set won't potentially bind to a
  port in use by something else (principle of least surprise).

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.

add/cleanup multiple inclusion protection.

add the following, derived from FreeBSD:
* IP_PORTRANGE socket option, which controls how the ephemeral ports
  are allocated. it takes the following settings:
	IP_PORTRANGE_DEFAULT	use anonportmin (49152) -> anonportmax (65535)
	IP_PORTRANGE_HIGH	as IP_PORTRANGE_DEFAULT (retained for FreeBSD
				compat reasons, where these are separate)
	IP_PORTRANGE_LOW	use 600 -> 1023. only works if uid==0.
* in_pcb flag INP_ANONPORT. set if port was allocated ephmerally

Import sys/netinet from 4.4BSD-Lite for reference purposes.

Update marc-pcmcia branch from trunk.

Add support for returning maximum supported MTU when ip_output fails with
EMSGSIZE.

Update marc-pcmcia branch from trunk.

Implement in_pcbrtentry() - return the route associated with a PCB.  If
one does not exist, attempt to allocate one.  This is mostly pulled from
tcp_input.c.

Pull SYN_cache_branch down into the main line.

Change return value for in_pcbnotify().

Implement the IP_RECVIF socket option: supply a datagram packet's incoming
interface using a sockaddr_dl in a control mbuf.

Implement SO_TIMESTAMP for IP datagrams.

Move packet information option processing into a generic function
so that they work with multicast UDP and raw IP as well as unicast UDP.

Contributed by Bill Fenner <fenner@parc.xerox.com>.

From trunk:
Eliminate SS_PRIV; instead, pass down a proc pointer to the usrreq methods
that need it.
Fix numerous memory leaks and bogus return values.

Overlay inp_faddr and inp_laddr into the header prototype.

Hash unconnected PCBs.

Add in_nullhost() and in_hosteq() macros, to hide some protocol
details.  Also, fix a bug in TCP wrt SYN+URG packets.

Pass a proc pointer down to the usrreq and pcbbind functions for PRU_ATTACH, PRU_BIND and
PRU_CONTROL.  The usrreq interface really needs to be split up, but this will have to wait.
Remove SS_PRIV completely.

netinet prototypes

Bring in changes for mondo patch 2.

Build a hash table of PCBs.  Hash function needs tweaking.

convert pcb lists to CIRCLEQs, so that the end can be looked at more
easily, and so that the original (insque/remque) logic can be effectively
mimiced.  (This fixes a bug in the previous set of list changes.)
also (since terminator is no longer null) reinstate uninitted list checks,
but mark them XXX.

in_pcbnotify*() don't return anything.

Various cleanup, including:
* Convert several data structures to use queue.h.
* Split in_pcbnotify() into two parts; one for notifying a specific PCB, and
one for notifying all PCBs for a particular foreign address.

be a bit more careful and explicit with types.  (basically a large no-op.)

KERNEL -> _KERNEL

New RCS ID's, take two.  they're more aesthecially pleasant, and use 'NetBSD'

Update to 4.4-Lite networking code, with a few local changes.

Fix some inconsistent spacing; spaces at the end of lines, etc.

More multicast stuff.
>From Chris Maeda, cmaeda@cs.washington.edu
These patches are derived from the IP Multicast patches for BSDI.

more rcsid additions and file header cleanups

Add consistent multiple-inclusion protection.

initial import of 386bsd-0.1 sources

Initial revision