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15583 discussions

by bqt＠softjar.se

Time for a new release announcement of TCP/IP for RSX-11M-PLUS. This release contains a lot of fixes and improvements in many areas. There are a couple of very serious bugs in TCP that is fixed in this release which is why I really encourage people to upgrade. (They do not happen often, but if they happen, they have a high chance of crashing the system.) Highlights: - Stability and reliability improvements in TCP. - Improved logic for TCP probing, keepalive and retransmits. Magica (a real PDP-11/70) and Mim (an emulated PDP-11/74) have been serving traffic for several weeks without any issues, and I think I have finally found and fixed a very obscure problem that occasionally could crash the system. (And both of these machines are more or less fully exposed to the internet, so they see a *lot* of connections and random attempts to compromise them all the time.) Detailed information on things that have been done since the last release: TCP: - Correct TCP reception. It could stop the retransmit timer even if there was still data outstanding under some circumstances. - Bugfix in data resend in TCP. Under some circumstances the retransmit timer stopped even though there was data to send. - Improved TCP retransmit timers to better handle probing and keepalive. - Improved TCP keepalive timer handling. - Improved TCP timeout handling for closing sockets. - Improved TCP retransmit timer restart logic in received TCP ACK processing. - General rework of TCP retransmit logic. - Bugfix. In TCP TimeWait state, received FIN packets did not result in an RST packet. - Changed TCP FinwWait2 to use keepalive timer to probe connections. - Improvement to TCP reception to dedup received packets also for packets that are pending. - Bugfix in TCP packet sending. If we ran out of IP POOL, memory got corrupted. - Improved handling of TCP receive window if TCP receive size is shrunk. - Add probing of socket during closing stages, since we have no other way to tell if the remote end is still around. - Change how TCP decides if it should probe a connection. - Bugfix in TCP. If a socket had no window but outstanding data, and was closed, and other end never opened up a window (for example if the remote end is gone), then the socket would get stuck in Fin-Wait-1. - Changed TC driver so that user ASTs are generated immediately if there is data to be read and the AST address is changed. - Improve TCP options processing. Some badly formatted tcp options packets could crash the system. - Improved TCP handling of ICMP error packets. UDP: - Bugfix in UDP. If several error packets were received for a socket, several ASTs were queued, but only one error is saved, meaning the additional ASTs could make code try to read several times, when all except the first would not have anything to actually read. TELNET/TELNETD: - Improved abort handling in telnet client. - Changed TELNETD do do spoof notifications in a simpler way. - Rewritten TELNETD to handle fast input without loosing characters. - Fix mapping error under special circumstances in telnetd, which could corrupt the system. - Added more IAC options processing in telnet and telnetd. DNS: - Improved name resolution handling if no UDP available. - Improve resolver domain I/O error handling. RWHOD: - Added handling of no UDP available in RWHOD. MAILD: - Improve MAILD handling of DECnet connections. - Improved privilege handling in MAILD. - Improved maild unread message function. - Added manual holding of mails. General: - Improved ability to stop protocols from IFCONFIG. As usual, the distribution is available from: ftp://mim.update.uu.se/bqtcp.dsk ftp://mim.update.uu.se/bqtcp.tap ftp://ftp.update.uu.se/pub/pdp11/rsx/tcpip/tcpip.dsk The documentation is also available through ftp on Mim, or also at http://mim.update.uu.se/tcpipdoc The firewall for Mim have now been removed, so no need for the alternate ports, but Mim is still listening to the alternate ports as well. ftp: 10021 telnet: 10023 Johnny -- Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt at softjar.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol

7 years, 6 months

Strange unit of time

by ian＠platinum.net

Excuse the noise, but I?ve got a fragmented recollection of a strange unit of time, and my faulty memory seems to equate this with VAX and/or VMS. My google-fu has failed me (or confirmed that this is some sort of fake memory) however I thought I?d run it past the experts in here. Does anyone know of anything strange about the unit of time, or possibly the epoch, or something else associated with time measurement (or the TOY clock or basically anything to do with time) in the DEC world? Sorry for the vagueness of the question, but hopefully someone can help :) Ian

7 years, 6 months

Asymmetric connectivity in a cluster

by dwe-6006＠philtest.org

I'm not sure that asymmetric is the correct description but I can't think of a better term. I am using SIMH and I have a two node cluster (with a quorum disk) the two nodes have a common system disk. The two nodes are RODNEL (1.1) booting from SYS0 and ADV2 (1.3) booting from SYS2. Both are running DECnet Plus both are running Multinet for the IP stack. At one time there was also a node (never actually a member of the cluster called HCBVAX (1.2) it booted from SYS1 but it no longer exists. The nodes are connected over an Ethernet and the MAC addresses are the ones that I would expect AA-00-04-00-01-04 (1.1) and AA-00-04-00-03-04 (1.3) HCBVAX was AA-00-04-00-02-04 (1.2) I can login to RODNEL and "set host adv2" with no problem, I can login to ADV2 and "set host rondel" with no problem. On each of the nodes I can "show cluster" and I see what I expect to see with no errors. While logged in to RODNEL the command "moni cluster" works fine. While logged in to ADV2 the wheels seem to fall off the bus - "show cluster" is fine but "moni cluster" isn't Any help would be appreciated. This is the information that I have gathered so far (I am not happy with the forwarding address in the error message from "moni proc" on ADV2 which seems to arise from RODNEL --Dave View of Cluster from system ID 1027 node: ADV2 22-APR-2018 22:24:50 +-----------------------------+ | SYSTEMS | MEMBERS | +-------------------+---------| | NODE | SOFTWARE | STATUS | +--------+----------+---------| | ADV2 | VMS V7.3 | MEMBER | | RODNEL | VMS V7.3 | MEMBER | +-----------------------------+ ^Z $ $ moni cluster %MONITOR-I-ESTABCON, establishing connection to remote node(s)... %%%%%%%%%%% OPCOM 22-APR-2018 22:24:56.75 %%%%%%%%%%% Message from user SYSTEM on RODNEL Event: Address Unreachable PDU Discard from: Node LOCAL:.RODNEL Routing, at: 2018-04-22-23:24:56.740-04:00Iinf Discard Reason=Destination Addrs Unknown, Source Address=49::00-01:AA-00-04-00-03-04:21, Forwarding Address=49::00-01:AA-00-04-00-02-04:21 eventUid FC95D640-467B-11E8-99E1-AA0004000104 entityUid 5683CC80-467B-11E8-8004-AA0004000104 streamUid 5A113900-467B-11E8-8004-AA0004000104 Still on ADV2 - NCP is odd as well: $ mcr ncp NCP>sho exec char Node Volatile Characteristics as of 22-APR-2018 22:31:17 Executor node = 1.3 (ADV2) Identification = DECnet-OSI for OpenVMS Management version = V4.0.0 Incoming timer = 0 Outgoing timer = 0 NSP version = V4.1.0 Maximum links = 0 Delay factor = 0 Delay weight = 0 Inactivity timer = 0 Retransmit factor = 0 Routing version = V2.0.0 Type = nonrouting IV Routing timer = 0 Subaddresses = 0 Broadcast routing timer = 0 Maximum address = 0 Maximum circuits = 0 Maximum cost = 0 Maximum hops = 0 Maximum visits = 0 Maximum area = 0 Max broadcast nonrouters = 0 Max broadcast routers = 0 Maximum path splits = 0 Area maximum cost = 0 Area maximum hops = 0 Maximum buffers = 0 Segment buffer size = 0 Buffer size = 0 Pipeline quota = 0 Alias maximum links = 0 Path split policy = Normal Maximum Declared Objects = 0 NCP>show know nodes Known Node Volatile Summary as of 22-APR-2018 22:31:29 Executor node = 1.3 (ADV2) State = on Identification = DECnet-OSI for OpenVMS NCP>def node rodnel Node address (1.1-63.1023): 1.1 Node name (1-6 characters): rodnel NCP>set node rodnel all %NCP-W-UNRCMP, Unrecognized component NCP>set node rodnel Node address (1.1-63.1023): 1.1 Node name (1-6 characters): rodnel %NCP-W-UNRCMP, Unrecognized component , Node NCP>exit Whereas RODNEL seems happier: NCP>sho exec char Node Volatile Characteristics as of 22-APR-2018 20:15:29 Executor node = 1.1 (RODNEL) Identification = DECnet-OSI for OpenVMS Management version = V4.0.0 Incoming timer = 0 Outgoing timer = 0 NSP version = V4.1.0 Maximum links = 0 Delay factor = 0 Delay weight = 0 Inactivity timer = 0 Retransmit factor = 0 Routing version = V2.0.0 Type = nonrouting IV Routing timer = 0 Subaddresses = 0 Broadcast routing timer = 0 Maximum address = 0 Maximum circuits = 0 Maximum cost = 0 Maximum hops = 0 Maximum visits = 0 Maximum area = 0 Max broadcast nonrouters = 0 Max broadcast routers = 0 Maximum path splits = 0 Area maximum cost = 0 Area maximum hops = 0 Maximum buffers = 0 Segment buffer size = 0 Buffer size = 0 Pipeline quota = 0 Alias maximum links = 0 Path split policy = Normal Maximum Declared Objects = 0 NCP>sho kno node Known Node Volatile Summary as of 22-APR-2018 20:15:37 Executor node = 1.1 (RODNEL) State = on Identification = DECnet-OSI for OpenVMS Node State Active Delay Circuit Next node Links 1.3 (ADV2) 1.1 (RODNEL) NCP>sho node adv2 char Node Volatile Characteristics as of 22-APR-2018 20:16:02 Remote node = 1.3 (ADV2) Service password = 0000000000000000

7 years, 6 months

Paging Steve Davidson

by bqt＠softjar.se

Have anyone heard from Steve Davidson recently, or know of a working address for him? Trying to reestablish a connection. Johnny -- Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt at softjar.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol

7 years, 6 months

DECUS stuff on hecnet?

by mcguire＠neurotica.com

Hey Johnny, is the DECUS RSX library up on MIM:: somewhere? Or does anyone else have it up and accessible via hecnet? Thanks, -Dave -- Dave McGuire, AK4HZ New Kensington, PA

7 years, 6 months

by supratim＠riseup.net

Hi, Any recommendations on a CISCO switch simulator that runs on Linux (Ubuntu 17.10) and supports GRE tunneling to a real CISCO switch over the internet? TIA Supratim

7 years, 7 months

KLH10 not idling host CPU

by bygg＠cafax.se

Mark Abene <phiber at phiber.com> wrote: > I'm posting this here in the hopes that there are other KLH10 emulator > users on HECnet. There are, I am one of them. > I've been using KLH10 with the tap patches for years and years, and idling > has always worked fine. At some point over the recent couple of years, > idling stopped working for me on linux (I run ubuntu 16.04.4 LTS with > latest updates as of yesterday, on a 64-bit intel machine). My CPU is stuck > at 100% utilization, without even starting an emulated OS (I run TOPS-20). > In fact, as soon as I type "GO" in KLH10 and before doing anything else, > the CPU immediately shoots to 100%. Is anyone else seeing this? In older > versions of ubuntu/linux this didn't happen. Handful of points: * the idling is done by modifying the idle loop in the guest operating system to interact with the KLH10 idler device, not by identifying the idle loop like SIMH does. * until the OS is up and running, there is no idling. In other words, while at the BOOT> prompt there will be a loop consuming 100% CPU waiting for terminal input. This is normal, and it has always been that way. * if you have had the same TOPS20 system running, with idling, earlier everything points at your host os (ubuntu) no longer cooperating with KLH10. I myself run (mostly) FreeBSD, and I have never had problems with idling the TOPSxx systems. * for TOPS10, there are a couple of more things to consider, one of them is that the idler device by default is at device code 700, which can't be accessed from the mode the -10 idle code runs in. Using 740 works. I would look for what has changed in your host os (ubuntu) regarding system timers and such. Your setup *should* work. > Thanks, > Mark --Johnny

7 years, 7 months

Announcing TCP/IP for RSX-11M-PLUS

by bqt＠softjar.se

7 years, 7 months

KLH10 not idling host CPU

by phiber＠phiber.com

I'm posting this here in the hopes that there are other KLH10 emulator users on HECnet. I've been using KLH10 with the tap patches for years and years, and idling has always worked fine. At some point over the recent couple of years, idling stopped working for me on linux (I run ubuntu 16.04.4 LTS with latest updates as of yesterday, on a 64-bit intel machine). My CPU is stuck at 100% utilization, without even starting an emulated OS (I run TOPS-20). In fact, as soon as I type "GO" in KLH10 and before doing anything else, the CPU immediately shoots to 100%. Is anyone else seeing this? In older versions of ubuntu/linux this didn't happen. Thanks, Mark

7 years, 7 months

Weird bridge problem

by sampsa＠mac.com

Hi, I?m running the bridge with the following bridge.conf: ?? SNIP --- local eth0 update psilo.update.uu.se:4711 hilanet 84.231.64.229:4711 maguro 38.130.230.105:4711 [decnet] local update hilanet maguro [lat] local update hilanet maguro ? SNIP ? But when I run the bridge using ?./bridge 4711? I keep getting these weird errors: Dumped packet from 38.130.230.105 (1024). Any ideas? Sampsa

7 years, 8 months

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