def retrieve_initial_info(self, data):
# 3 longwords: protocol version w/o FD, my (new) ID w/o FD,
# and then a -1 with the FD of the IVSHMEM file which is
# delivered before this.
assert len(data) == 24, 'Initial data needs three quadwords'
# Enough idiot checks.
mailbox_fd = self.latest_fd
version, self.id, minusone = struct.unpack('qqq', data)
assert version == self.CLIENT_IVSHMEM_PROTOCOL_VERSION, \
'Unxpected protocol version %d' % version
assert minusone == -1, \
'Expected -1 with mailbox fd, got %d' % minuseone
assert 1 <= self.id, 'My ID is bad: %d' % self.id
self.nodename = 'z%02d' % self.id
print('This ID = %2d (%s)' % (self.id, self.nodename))
# Initialize my mailbox slot. Get other parameters from the
# globals because the IVSHMSG protocol doesn't allow values
# beyond the intial three. The constructor does some work
# then returns a few attributes pulled out of the globals,
# but work is only actually done on the first call.
mailbox = FAMEZ_MailBox(fd=mailbox_fd,
client_id=self.id,
nodename=self.nodename)
self.SI.nClients = mailbox.nClients
self.SI.nEvents = mailbox.nEvents
self.SI.server_id = mailbox.server_id
def __init__(self, args=None):
'''Args must be an object with the following attributes:
foreground, logfile, mailbox, nClients, silent, socketpath, verbose
Suitable defaults will be supplied.'''
# Pass command line args to ProtocolIVSHMSG, then open logging.
if args is None:
args = argparse.Namespace()
for arg, default in self._required_arg_defaults.items():
setattr(args, arg, getattr(args, arg, default))
# Mailbox may be sized above the requested number of clients to
# satisfy QEMU IVSHMEM restrictions.
args.server_id = args.nClients + 1
args.nEvents = args.nClients + 2
FAMEZ_MailBox(args=args) # singleton class, no need to keep instance
self.cmdlineargs = args
if args.foreground:
TPlog.startLogging(sys.stdout, setStdout=False)
else:
PRINT('Logging to %s' % args.logfile)
TPlog.startLogging(
DailyLogFile.fromFullPath(args.logfile),
setStdout=True) # "Pass-through" explicit print() for debug
args.logmsg = TPlog.msg
args.logerr = TPlog.err
# By Twisted version 18, "mode=" is deprecated and you should just
# inherit the tacky bit from the parent directory. wantPID creates
# <path>.lock as a symlink to "PID".
E = UNIXServerEndpoint(
TIreactor,
args.socketpath,
mode=0o666, # Deprecated at Twisted 18
wantPID=True)
E.listen(self)
args.logmsg('FAME-Z server @%d ready for %d clients on %s' %
(args.server_id, args.nClients, args.socketpath))