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History log of /src/sys/netbt/rfcomm_session.c
RevisionDateAuthorComments
 1.30  05-Jul-2024  rin sys: Drop redundant NULL check before m_freem(9)

m_freem(9) safely has accepted NULL argument at least since 4.2BSD:
https://www.tuhs.org/cgi-bin/utree.pl?file=4.2BSD/usr/src/sys/sys/uipc_mbuf.c

Compile-tested on amd64/ALL.

Suggested by knakahara@
 1.29  09-Feb-2024  andvar fix spelling mistakes, mainly in comments and log messages.
 1.28  05-Dec-2021  msaitoh s/commmand/command/ in comment.
 1.27  29-Feb-2020  maxv pass the address of the field, instead of relying on it being the first
field of the structure/union, no functional change, discussed with plunky@
 1.26  23-Feb-2020  plunky fix reversed logic for Remote Port Negotiation, pointed out by maxv@
 1.25  22-Dec-2018  maxv branches: 1.25.6;
Replace M_ALIGN and MH_ALIGN by m_align.
 1.24  03-Sep-2018  riastradh Rename min/max -> uimin/uimax for better honesty.

These functions are defined on unsigned int. The generic name
min/max should not silently truncate to 32 bits on 64-bit systems.
This is purely a name change -- no functional change intended.

HOWEVER! Some subsystems have

#define min(a, b) ((a) < (b) ? (a) : (b))
#define max(a, b) ((a) > (b) ? (a) : (b))

even though our standard name for that is MIN/MAX. Although these
may invite multiple evaluation bugs, these do _not_ cause integer
truncation.

To avoid `fixing' these cases, I first changed the name in libkern,
and then compile-tested every file where min/max occurred in order to
confirm that it failed -- and thus confirm that nothing shadowed
min/max -- before changing it.

I have left a handful of bootloaders that are too annoying to
compile-test, and some dead code:

cobalt ews4800mips hp300 hppa ia64 luna68k vax
acorn32/if_ie.c (not included in any kernels)
macppc/if_gm.c (superseded by gem(4))

It should be easy to fix the fallout once identified -- this way of
doing things fails safe, and the goal here, after all, is to _avoid_
silent integer truncations, not introduce them.

Maybe one day we can reintroduce min/max as type-generic things that
never silently truncate. But we should avoid doing that for a while,
so that existing code has a chance to be detected by the compiler for
conversion to uimin/uimax without changing the semantics until we can
properly audit it all. (Who knows, maybe in some cases integer
truncation is actually intended!)
 1.23  05-Aug-2014  rtr branches: 1.23.26; 1.23.28;
split PRU_SEND function out of pr_generic() usrreq switches and put into
separate functions

xxx_send(struct socket *, struct mbuf *, struct mbuf *,
struct mbuf *, struct lwp *)

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

- replace calls to pr_generic() with req = PRU_SEND with calls to
pr_send()

rename existing functions that operate on PCB for consistency (and to
free up their names for xxx_send() PRUs

- l2cap_send() -> l2cap_send_pcb()
- sco_send() -> sco_send_pcb()
- rfcomm_send() -> rfcomm_send_pcb()

patch reviewed by rmind
 1.22  31-Jul-2014  rtr split PRU_DISCONNECT, PRU_SHUTDOWN and PRU_ABORT function out of
pr_generic() usrreq switches and put into separate functions

xxx_disconnect(struct socket *)
xxx_shutdown(struct socket *)
xxx_abort(struct socket *)

- always KASSERT(solocked(so)) even if not implemented
- replace calls to pr_generic() with req =
PRU_{DISCONNECT,SHUTDOWN,ABORT}
with calls to pr_{disconnect,shutdown,abort}() respectively

rename existing internal functions used to implement above functionality
to permit use of the names for xxx_{disconnect,shutdown,abort}().

- {l2cap,sco,rfcomm}_disconnect() ->
{l2cap,sco,rfcomm}_disconnect_pcb()
- {unp,rip,tcp}_disconnect() -> {unp,rip,tcp}_disconnect1()
- unp_shutdown() -> unp_shutdown1()

patch reviewed by rmind
 1.21  24-Jul-2014  rtr 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
 1.20  09-Jul-2014  rtr * split PRU_PEERADDR and PRU_SOCKADDR function out of pr_generic()
usrreq switches and put into separate functions
xxx_{peer,sock}addr(struct socket *, struct mbuf *).

- KASSERT(solocked(so)) always in new functions even if request
is not implemented

- KASSERT(pcb != NULL) and KASSERT(nam) if the request is
implemented and not for tcp.

* for tcp roll #ifdef KPROF and #ifdef DEBUG code from tcp_usrreq() into
easier to cut & paste functions tcp_debug_capture() and
tcp_debug_trace()

- functions provided by rmind
- remaining use of PRU_{PEER,SOCK}ADDR #define to be removed in a
future commit.

* rename netbt functions to permit consistency of pru function names
(as has been done with other requests already split out).

- l2cap_{peer,sock}addr() -> l2cap_{peer,sock}_addr_pcb()
- rfcomm_{peer,sock}addr() -> rfcomm_{peer,sock}_addr_pcb()
- sco_{peer,sock}addr() -> sco_{peer,sock}_addr_pcb()

* split/refactor do_sys_getsockname(lwp, fd, which, nam) into
two functions do_sys_get{peer,sock}name(fd, nam).

- move PRU_PEERADDR handling into do_sys_getpeername() from
do_sys_getsockname()
- have svr4_stream directly call do_sys_get{sock,peer}name()
respectively instead of providing `which' & fix a DPRINTF string
that incorrectly wrote "getpeername" when it meant "getsockname"
- fix sys_getpeername() and sys_getsockname() to call
do_sys_get{sock,peer}name() without `which' and `lwp' & adjust
comments
- bump kernel version for removal of lwp & which parameters from
do_sys_getsockname()

note: future cleanup to remove struct mbuf * abuse in
xxx_{peer,sock}name()
still to come, not done in this commit since it is easier to do post
split.

patch reviewed by rmind

welcome to 6.99.47
 1.19  20-May-2014  rmind netbt: rename some attach/detach functions to have _pcb suffix, so
we could use standard attach/detach naming for pr_usrreq functions.
No functional change.
 1.18  27-Jul-2011  plunky branches: 1.18.12; 1.18.26;

cleanup some DIAGNOSTIC and KASSERT code

- remove #ifdef DIAGNOSTIC, so that we won't act
differently

- handle the cases where a Bluetooth adapter
sends invalid packet data (I've not seen this,
but it is not impossible)

- use KASSERT for actual impossible situations
(to catch bad future development)
 1.17  17-Nov-2010  plunky do not produce an error when connections are closed normally

for L2CAP sockets, this solves an irritating error message from sdpd(8),
which can now differentiate between normal closure and error.
 1.16  03-Jan-2010  plunky branches: 1.16.4;
when receiving a MCC PN response, the max frame size that the remote
party requests must be less than the one we asked for which will not
be greater than the max acceptable value so no need to test for that
but make sure that it is not smaller than minimum acceptable value.
 1.15  13-Sep-2009  pooka Wipe out the last vestiges of POOL_INIT with one swift stroke. In
most cases, use a proper constructor. For proplib, give a local
equivalent of POOL_INIT for the kernel object implementation. This
way the code structure can be preserved, and a local link set is
not hazardous anyway (unless proplib is split to several modules,
but that'll be the day).

tested by booting a kernel in qemu and compile-testing i386/ALL
 1.14  06-Aug-2008  plunky branches: 1.14.4; 1.14.10; 1.14.12;
Convert socket options code to use a sockopt structure
instead of laying everything into an mbuf.

approved by core
 1.13  24-Apr-2008  ad branches: 1.13.2; 1.13.4; 1.13.8;
Merge the socket locking patch:

- Socket layer becomes MP safe.
- Unix protocols become MP safe.
- Allows protocol processing interrupts to safely block on locks.
- Fixes a number of race conditions.

With much feedback from matt@ and plunky@.
 1.12  31-Jan-2008  plunky branches: 1.12.6; 1.12.8;
do not destroy session callout until the session is definitely finished
with, otherwise trying to stop it will cause a panic
 1.11  03-Nov-2007  plunky branches: 1.11.2;
"struct callout" -> callout_t
don't use callout_reset()
do use callout_destroy()
 1.10  09-Jul-2007  ad branches: 1.10.6; 1.10.8; 1.10.12;
Merge some of the less invasive changes from the vmlocking branch:

- kthread, callout, devsw API changes
- select()/poll() improvements
- miscellaneous MT safety improvements
 1.9  21-Apr-2007  plunky Add 'service level' security for L2CAP and RFCOMM connections, following
the Linux (BlueZ) API.

- L2CAP or RFCOMM connections can require the baseband radio link
mode be any of:
authenticated (devices are paired)
encrypted (implies authentication)
secured (encryption, plus generate new link key)

- for sockets, the mode is set using setsockopt(2) and the socket
connection will be aborted if the mode change fails.

- mode settings will be applied during connection establishment, and
for safety, we enter a wait state and will only proceed when the mode
settings are successfuly set.

- It is possible to change the mode on already open connections, but
not possible to guarantee that data already queued (from either end)
will not be delivered. (this is a feature, not a bug)

- bthidev(4) and rfcomm_sppd(1) support "auth", "encrypt" and
"secure" options

- btdevctl(8) by default enables "auth" for HIDs, and "encrypt" for
keyboards (which are required to support it)
 1.8  06-Apr-2007  plunky add const attribute to the CRC table
 1.7  15-Mar-2007  plunky remove C++ style comments
 1.6  12-Mar-2007  ad branches: 1.6.2; 1.6.4;
Pass an ipl argument to pool_init/POOL_INIT to be used when initializing
the pool's lock.
 1.5  05-Mar-2007  plunky branches: 1.5.2;
whitespace
 1.4  16-Nov-2006  christos branches: 1.4.2; 1.4.4; 1.4.8;
__unused removal on arguments; approved by core.
 1.3  12-Oct-2006  christos - sprinkle __unused on function decls.
- fix a couple of unused bugs
- no more -Wno-unused for i386
 1.2  11-Sep-2006  plunky branches: 1.2.2;
hci_link.c:
- In hci_link_free(), do not unlink items from a LIST queue within
a LIST_FOREACH() iterator.

rfcomm_session.c:
- In rfcomm_session_recv_mcc_nsc(), do not unlink items from a LIST
queue within a LIST_FOREACH() iterator.

from scw@
 1.1  19-Jun-2006  gdamore branches: 1.1.2; 1.1.4; 1.1.6; 1.1.8; 1.1.10; 1.1.12; 1.1.14;
Initial import of bluetooth stack on behalf of Iain Hibbert. (plunky@,
NetBSD Foundation Membership still pending.) This stack was written by
Iain under sponsorship from Itronix Inc.

The stack includes support for rfcomm networking (networking via your
bluetooth enabled cell phone), hid devices (keyboards/mice), and headsets.

Drivers for both PCMCIA and USB bluetooth controllers are included.
 1.1.14.2  09-Sep-2006  rpaulo sync with head
 1.1.14.1  19-Jun-2006  rpaulo file rfcomm_session.c was added on branch rpaulo-netinet-merge-pcb on 2006-09-09 02:58:39 +0000
 1.1.12.1  18-Nov-2006  ad Sync with head.
 1.1.10.1  14-Sep-2006  riz Pull up following revision(s) (requested by plunky in ticket #161):
sys/dev/bluetooth/btdev.h: revision 1.4
distrib/sets/lists/comp/mi: revision 1.922
usr.sbin/postinstall/postinstall: revision 1.25
sys/netbt/hci_unit.c: revision 1.3
sys/netbt/hci_ioctl.c: revision 1.4
usr.sbin/sdpd/profile.c: revision 1.2
usr.sbin/btdevctl/btdevctl.c: revision 1.2
share/man/man4/Makefile: revision 1.405
distrib/sets/lists/man/mi: revision 1.930
distrib/sets/lists/etc/mi: revision 1.176
usr.sbin/sdpd/profile.c: revision 1.3
usr.sbin/btdevctl/btdevctl.c: revision 1.3
etc/MAKEDEV.tmpl: revision 1.62
distrib/sets/lists/base/mi: revision 1.650
usr.sbin/btdevctl/btdevctl.h: revision 1.2
usr.bin/sdpquery/sdpquery.1: revision 1.4
sys/netbt/rfcomm_session.c: revision 1.2
usr.sbin/btdevctl/btdevctl.8: revision 1.3
usr.bin/sdpquery/search.c: revision 1.2
usr.sbin/sdpd/Makefile: revision 1.2
sys/dev/bluetooth/Makefile: revision 1.3
usr.sbin/btdevctl/cfg.c: file removal
sys/netbt/files.netbt: revision 1.4
usr.sbin/btdevctl/sdp.c: revision 1.1
sys/dev/bluetooth/bthidev.c: revision 1.3
etc/bluetooth/Makefile: revision 1.3
sys/dev/pcmcia/files.pcmcia: revision 1.51
sys/dev/bluetooth/bthidev.c: revision 1.4
sys/dev/bluetooth/bthidev.h: revision 1.3
usr.sbin/btdevctl/dev.c: file removal
sys/dev/bluetooth/files.bluetooth: revision 1.10
sys/arch/i386/conf/GENERIC: revision 1.777
share/man/man4/ubt.4: revision 1.6
share/man/man4/bthub.4: revision 1.3
sys/netbt/hci.h: revision 1.5
sys/arch/i386/conf/GENERIC_LAPTOP: revision 1.202
lib/libsdp/sdp.h: revision 1.2
usr.sbin/btdevctl/print.c: revision 1.1
share/man/man4/bthidev.4: revision 1.5
share/man/man4/btdev.4: file removal
usr.sbin/btdevctl/print.c: revision 1.2
sys/arch/i386/conf/GENERIC_LAPTOP: revision 1.205
usr.sbin/btdevctl/Makefile: revision 1.2
sys/dev/usb/files.usb: revision 1.70
sys/netbt/l2cap_signal.c: revision 1.2
sys/netbt/hci_link.c: revision 1.4
sys/dev/bluetooth/bthub.c: revision 1.3
share/man/man4/btsco.4: revision 1.5
sys/netbt/hci_link.c: revision 1.5
share/man/man4/btdev.4: revision 1.4
sys/dev/bluetooth/btkbd.c: revision 1.3
sys/dev/bluetooth/btdev.c: file removal
sys/netbt/hci_event.c: revision 1.2
sys/dev/bluetooth/btsco.h: revision 1.2
etc/mtree/special: revision 1.101
sys/dev/bluetooth/btsco.c: revision 1.3
sys/conf/majors: revision 1.27
usr.sbin/sdpd/hf.c: revision 1.1
sys/dev/bluetooth/btsco.c: revision 1.4
share/man/man5/rc.conf.5: revision 1.107
sys/dev/bluetooth/btdev.c: revision 1.2
etc/rc.d/btdevctl: revision 1.2
usr.sbin/btdevctl/db.c: revision 1.1
etc/rc.d/btdevctl: revision 1.3
etc/bluetooth/btdevctl.conf: revision 1.1
usr.sbin/btdevctl/hid.c: file removal
sys/arch/i386/conf/GENERIC: revision 1.781
sys/dev/bluetooth/btdev.h: revision 1.3
Make btdev default count explicit
Fix typo in variable name
update to bluetooth device attachment:
remove pseudo-device btdev(4) and inherent limitations
add bthub(4) which autoconfigures at bluetooth controllers as they
are enabled. bluetooth devices now attach here.
btdevctl(8) and its cache is updated to handle new semantics
etc/rc.d/btdevctl is updated to configure devices from a list
in /etc/bluetooth/btdevctl.conf
also include service name in dictionary being sent to kernel.
(this is not used just yet, but it might be in the future and it will
be easier if we dont have to provide code to handle its absence)
clarify the CAVEAT section somewhat
Add service discovery support for the Handsfree profile
Replace static 'FreeBSD' string with operating system name gleaned
from uname(3)
Halt the callout on detach
btsco.c:
- sco_getopt(..., SO_SCO_MTU, ...) expects the address of a uint16_t,
not an int. So change sc_mtu's type to uint16_t.
- Try a little harder to ensure btsco_round_blocksize() does not
return zero. Prevents a subsequent panic in audio_init_ringbuffer().
from scw@
Endian issues:
hci_event.c:
- Convert memo->response.clock_offset to host-endian.
hci_ioctl.c:
- printf format tweak (size_t)
hci_link.c:
- Convert memo->response.clock_offset from host-endian.
- Tweak a DIAGNOSTIC message.
l2cap_signal.c:
- In l2cap_recv_config_req(), rp->scid is little-endian so make sure
we convert from host-endian.
from scw@
hci_link.c:
- In hci_link_free(), do not unlink items from a LIST queue within
a LIST_FOREACH() iterator.
rfcomm_session.c:
- In rfcomm_session_recv_mcc_nsc(), do not unlink items from a LIST
queue within a LIST_FOREACH() iterator.
from scw@
guard against a possible situation where the list of l2cap channels is changed
when the bluetooth code is not expecting it to be. During a disconnect, we can
detach the channel that is being disconnected, but its not really safe to detach
any others.
Print explicit 64-bit types using the format macros from int_fmtio.h.
Unbreaks the build for our LP64 ports, where "long long" typically is
not 64 bits.
 1.1.8.2  13-Jul-2006  gdamore Merge from HEAD.
 1.1.8.1  19-Jun-2006  gdamore file rfcomm_session.c was added on branch gdamore-uart on 2006-07-13 17:49:58 +0000
 1.1.6.3  14-Sep-2006  yamt sync with head.
 1.1.6.2  26-Jun-2006  yamt sync with head.
 1.1.6.1  19-Jun-2006  yamt file rfcomm_session.c was added on branch yamt-pdpolicy on 2006-06-26 12:53:57 +0000
 1.1.4.2  22-Jun-2006  chap Complete a sync sys/ with head.
 1.1.4.1  19-Jun-2006  chap file rfcomm_session.c was added on branch chap-midi on 2006-06-22 03:39:50 +0000
 1.1.2.6  04-Feb-2008  yamt sync with head.
 1.1.2.5  15-Nov-2007  yamt sync with head.
 1.1.2.4  03-Sep-2007  yamt sync with head.
 1.1.2.3  30-Dec-2006  yamt sync with head.
 1.1.2.2  21-Jun-2006  yamt sync with head.
 1.1.2.1  19-Jun-2006  yamt file rfcomm_session.c was added on branch yamt-lazymbuf on 2006-06-21 15:10:51 +0000
 1.2.2.2  10-Dec-2006  yamt sync with head.
 1.2.2.1  22-Oct-2006  yamt sync with head
 1.4.8.1  03-Sep-2007  wrstuden Sync w/ NetBSD-4-RC_1
 1.4.4.4  07-May-2007  yamt sync with head.
 1.4.4.3  15-Apr-2007  yamt sync with head.
 1.4.4.2  24-Mar-2007  yamt sync with head.
 1.4.4.1  12-Mar-2007  rmind Sync with HEAD.
 1.4.2.2  03-Jan-2010  jdc Pull up revision 1.16 (requested by plunky in ticket #1372).

when receiving a MCC PN response, the max frame size that the remote
party requests must be less than the one we asked for which will not
be greater than the max acceptable value so no need to test for that
but make sure that it is not smaller than minimum acceptable value.
 1.4.2.1  19-Jul-2007  liamjfoy branches: 1.4.2.1.4;
Pull up following revision(s) (requested by plunky in ticket #744):
sys/netbt/l2cap_lower.c: revision 1.6
sys/dev/bluetooth/btdev.h: revision 1.6
sys/netbt/sco_socket.c: revision 1.9
sys/netbt/rfcomm_upper.c: revision 1.3
sys/netbt/l2cap_socket.c: revision 1.7
sys/netbt/rfcomm_upper.c: revision 1.5
lib/libusbhid/usbhid.h: revision 1.5
sys/netbt/rfcomm_upper.c: revision 1.6
usr.sbin/btdevctl/btdevctl.c: revision 1.4
usr.sbin/btdevctl/btdevctl.h: revision 1.3
usr.sbin/btdevctl/btdevctl.8: revision 1.4
sys/netbt/rfcomm_session.c: revision 1.5
sys/netbt/hci.h: revision 1.10
usr.bin/rfcomm_sppd/rfcomm_sppd.c: revision 1.6
sys/netbt/hci_link.c: revision 1.11
usr.bin/rfcomm_sppd/rfcomm_sppd.c: revision 1.7
usr.bin/rfcomm_sppd/rfcomm_sppd.c: revision 1.8
sys/dev/bluetooth/btsco.c: revision 1.14
sys/netbt/rfcomm_session.c: revision 1.9
usr.sbin/btdevctl/sdp.c: revision 1.2
share/man/man9/bluetooth.9: revision 1.2
usr.sbin/btdevctl/sdp.c: revision 1.3
sys/dev/bluetooth/bthidev.c: revision 1.8
sys/netbt/l2cap.h: revision 1.4
sys/netbt/rfcomm.h: revision 1.3
sys/netbt/l2cap.h: revision 1.5
sys/netbt/l2cap_misc.c: revision 1.3
share/man/man4/bluetooth.4: revision 1.5
lib/libusbhid/usbhid.3: revision 1.11
sys/netbt/bluetooth.h: revision 1.5
share/man/man4/bthidev.4: revision 1.8
sys/netbt/rfcomm_dlc.c: revision 1.3
usr.sbin/btdevctl/print.c: revision 1.8
sys/netbt/rfcomm_socket.c: revision 1.7
sys/netbt/l2cap_signal.c: revision 1.4
sys/netbt/l2cap_signal.c: revision 1.5
sys/netbt/l2cap_signal.c: revision 1.7
sys/netbt/hci_event.c: revision 1.6
usr.bin/rfcomm_sppd/rfcomm_sppd.1: revision 1.5
sys/netbt/l2cap_upper.c: revision 1.3
sys/netbt/l2cap_lower.c: revision 1.2
usr.sbin/btdevctl/db.c: revision 1.3
sys/netbt/l2cap_upper.c: revision 1.6
lib/libusbhid/descr.c: revision 1.5
sys/netbt/l2cap_upper.c: revision 1.7
sys/netbt/l2cap_lower.c: revision 1.4
Add 'service level' security for L2CAP and RFCOMM connections, following
the Linux (BlueZ) API.
- L2CAP or RFCOMM connections can require the baseband radio link
mode be any of:
authenticated (devices are paired)
encrypted (implies authentication)
secured (encryption, plus generate new link key)
- for sockets, the mode is set using setsockopt(2) and the socket
connection will be aborted if the mode change fails.
- mode settings will be applied during connection establishment, and
for safety, we enter a wait state and will only proceed when the mode
settings are successfuly set.
- It is possible to change the mode on already open connections, but
not possible to guarantee that data already queued (from either end)
will not be delivered. (this is a feature, not a bug)
- bthidev(4) and rfcomm_sppd(1) support "auth", "encrypt" and
"secure" options
- btdevctl(8) by default enables "auth" for HIDs, and "encrypt" for
keyboards (which are required to support it)
- ALSO INCLUDES OTHER MINOR FIXES
 1.4.2.1.4.1  03-Jan-2010  jdc Pull up revision 1.16 (requested by plunky in ticket #1372).

when receiving a MCC PN response, the max frame size that the remote
party requests must be less than the one we asked for which will not
be greater than the max acceptable value so no need to test for that
but make sure that it is not smaller than minimum acceptable value.
 1.5.2.4  01-Jul-2007  ad Adapt to callout API change.
 1.5.2.3  08-Jun-2007  ad Sync with head.
 1.5.2.2  10-Apr-2007  ad Sync with head.
 1.5.2.1  13-Mar-2007  ad Sync with head.
 1.6.4.1  18-Mar-2007  reinoud First attempt to bring branch in sync with HEAD
 1.6.2.1  11-Jul-2007  mjf Sync with head.
 1.10.12.1  13-Nov-2007  bouyer Sync with HEAD
 1.10.8.2  23-Mar-2008  matt sync with HEAD
 1.10.8.1  06-Nov-2007  matt sync with HEAD
 1.10.6.1  04-Nov-2007  jmcneill Sync with HEAD.
 1.11.2.1  18-Feb-2008  mjf Sync with HEAD.
 1.12.8.1  18-May-2008  yamt sync with head.
 1.12.6.2  28-Sep-2008  mjf Sync with HEAD.
 1.12.6.1  02-Jun-2008  mjf Sync with HEAD.
 1.13.8.1  19-Oct-2008  haad Sync with HEAD.
 1.13.4.1  18-Sep-2008  wrstuden Sync with wrstuden-revivesa-base-2.
 1.13.2.3  11-Mar-2010  yamt sync with head
 1.13.2.2  16-Sep-2009  yamt sync with head
 1.13.2.1  04-May-2009  yamt sync with head.
 1.14.12.1  21-Apr-2010  matt sync to netbsd-5
 1.14.10.1  03-Jan-2010  jdc Pull up revision 1.16 (requested by plunky in ticket #1221).

when receiving a MCC PN response, the max frame size that the remote
party requests must be less than the one we asked for which will not
be greater than the max acceptable value so no need to test for that
but make sure that it is not smaller than minimum acceptable value.
 1.14.4.1  03-Jan-2010  jdc Pull up revision 1.16 (requested by plunky in ticket #1221).

when receiving a MCC PN response, the max frame size that the remote
party requests must be less than the one we asked for which will not
be greater than the max acceptable value so no need to test for that
but make sure that it is not smaller than minimum acceptable value.
 1.16.4.1  05-Mar-2011  rmind sync with head
 1.18.26.1  10-Aug-2014  tls Rebase.
 1.18.12.1  20-Aug-2014  tls Rebase to HEAD as of a few days ago.
 1.23.28.2  08-Apr-2020  martin Merge changes from current as of 20200406
 1.23.28.1  10-Jun-2019  christos Sync with HEAD
 1.23.26.2  26-Dec-2018  pgoyette Sync with HEAD, resolve a few conflicts
 1.23.26.1  06-Sep-2018  pgoyette Sync with HEAD

Resolve a couple of conflicts (result of the uimin/uimax changes)
 1.25.6.1  29-Feb-2020  ad Sync with head.

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