Commit copied from the WRS.

wrs_shm_get have to close file descriptors when it fails to open shmem.
Otherwise program which tries to open shmem will keep opening file descriptors.
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

--Add a new function dump_vlan to print vlan number
--To be able to read aux data use recvmsg instead of recvfrom
--For incoming data use aux to read VLAN number
--For outgoing use VLAN header
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

--Read VLAN number from aux; network driver strips VLAN information from the
  frame
--Remove a hack from common-fun.c fro WRS, it is not needed anymore;
  even for WRS we read VLAN from aux
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Otherwise it breaks Minipc and wr_mon cannot start.

commit
  168655e6 fsm: when no frame, set msgtype to PPM_NO_MESSAGE

was good, but I didn't notice that pp_packet_prefilter() may
force a packet drop. This moves the assignemento of PPM_NO_MESSAGE
to a later place, just before calling the state machine.
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

The main problem was introduced by:

   d2a57023 std-servo: fix initial jump for p2p slaves

There, we falled back on unix->get_time to make adjustments if
hal->get_time failed.  Only happens as non-wr slave.

Actually, the get_time call has never been implemented in the hal, and
we always falled on unix time. But if frames are timestamped with
WR time, we can adjust based on Unix time.

We now read WR time internally, waiting for something better (we have
constant addresses in here).

Note: we are still unable to steer frequency, despite the efforts
(and it used to work, ages ago).
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

This dates back to the original copying over from ptp-noposix:

  89a46c6d time-wrs/wrs-socket.c: implementation of net functions for wrs arch

(but the bug was not in ptp-noposix).

It is exposed by the newer compiler (well, library) we are using.
But a calloc of 0 bytes should return NULL, to ensure it's not used...
Documentation disagrees:

       If size is 0, then malloc() returns either NULL, or a unique
       pointer value that can later be successfully passed to free().
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

This reverts commit 67b8a0f1.

It is now redundant, as we make it at config time.

This is already in place for arch-unix, but is not working for arch-wrs
because we need to look for the interface name before opening it.
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

bug introduced in

   cc014e83 fsm: centralize checks on the frame
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

This is old misc stuff that I rebased yesterday. Actually, I had more
moves to fsm-lib, but some of it already moved to common-fun (which I
dislike, but let's ignore the thing by now).

update:
include/libwr/sfp_lib.h
include/libwr/util.h
shmem.c
util.c
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

This is another step in a general cleanup of the state machine.  To
help me knowning what is audited and what is not, I rename the "common
functions" to fsm-lib. This is the management of announce.

- master and slave functions were the same, so they are unified now

- hooks->handle_annunce returns int (it may fail)
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

We check the frame length for the various message type in a single place,
thus removing all checks around (that didn't cover all cases anyways).

Also, we check for protocol version 2, something that we never did.
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

This removes a number of explicit checks in the states themselves.
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

update:
include/libwr/sfp_lib.h
include/libwr/util.h
shmem.c
util.c
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

On the switch, there is no need for the ppsi to use config file in
the /wr/etc/ppsi.conf.
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

As a side effect, we get a reported "enter initializing" message
when wrs has a link-up event (because in that case state-change is
performed externally, not by a state that switches to another).
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Commit d2b2c636 introduced a caching of the current state structure.
The "current" structure, as long as not null, is considered valid.
arch-wrs, just sets ppi->state to initializing on link-up, without
clearing the cached pointer, so fsm.c was using the old pointer,
resulting in use of closed file descriptors, as no init was performed.

This doesn't apply to change from withing the states themselves, as
fsm.c manages the state change.

As a side effect, now that we check the state numberm there's no need
to zero the pointer on state leave. (And while a it another trivial detail...).
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Some arguments are not needed any more. Removed.
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Most arguments of net->send are redundant, as the ppi includes all
info. In particular, chtype and "is_pdelay_addr" derive from the
message type.  And the timestamp is always internal.

I chose not to remove message, len and msgtype because the message
being sent includes the header (ppi->tx_offset), so there's some
calculation to extract them.  This may happen in a later commit, if I
find that is a size improvement.

Bugs fixed as a side effect:
   - the "if" for "is_pelay" missed PDELAY_RESP_F_UP (now it's in msgtype.c)
   - wrpc pdelay was always using the e2e mac address

This commit decreases the size of all archs by 60 bytes, but increases
wrpc by 20 bytes because of the fix above
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Most stuff in the header can be factorized. The commit does so.
Some fixme's are removed (about correctionField for example) but
we know they still apply.
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

This was my fault. The initial time jump was based on "T4 + MPD". This
on the assumption that T4 is sharper then time->get().  At least this
is true for White Rabbit systems, where time->get() was not even
correct when I started the project.

As a result, the initial jump for a p2p slave was always wrong,
because it referred to an old timestamp. We ended up a few hundreds ms
off the master, to the start a long steering.

We now add ofm to the current time, and the result is good in both case.
WR systems have their own servo anyways, but even a slave to non-wr
masters should behave well, because time->set now works.
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

The idea that somebody wants to steer time for >1s offsets is
perverse.  Let's simplify (if any, we may want to jump for <1s offsets
that are bigger than a few milliseconds).
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>