[HECnet] Configuring py-decnet.

The quick and dirty patch: Add the following to the top of ethernet.py: TUNSETIFF = 0x400454ca TUNSETOWNER = TUNSETIFF + 2 IFF_TUN = 0x0001 IFF_TAP = 0x0002 IFF_NO_PI = 0x1000 Modify the top half of _TapEth class as: if fcntl: class _TapEth (_Ethernet): def open (self): fd = os.open('/dev/net/tun', os.O_RDWR | os.O_NONBLOCK) ifr = struct.pack('16sH', self.dev.encode('utf-8'), IFF_TAP | IFF_NO_PI) ioctl(fd, TUNSETIFF, ifr) self.tap = fd self.sellist = ( fd, ) # Turn the interface on -- needed only on Mac OS Keith From: owner-hecnet at Update.UU.SE [mailto:owner-hecnet at Update.UU.SE] On Behalf Of Paul Koning Sent: 22 August 2020 20:28 To: hecnet at update.uu.se Subject: Re: [HECnet] Configuring py-decnet. Correct. I need to get that patch integrated, but I haven't used TAP in 5 years or so. That means it takes a bit of time for me to understand it and check it. I use PCAP normally, and that works well. paul On Aug 22, 2020, at 2:59 PM, Robert Armstrong <bob at jfcl.com<mailto:bob at jfcl.com>> wrote: FWIW, I don?t believe that the ?tap:? support in pyDECnet works out of the box. There?s a patch for it floating around that somebody did, but I can?t remember who just offhand. Hopefully somebody can remind me. An alternative is to use pcap to connect pyDECnet to a TAP device. That works just fine, and I use that setup here to connect pyDECnet to a simulated VAX. Bob