https://smaugmuds.afkmods.com/index.php?a=rssfeed&f=7 The largest Smaug community resource site. - Discussion of general coding issues that are not necessarily codebase specific, or that cover a codebase that does not have a designated forum. en SmaugMuds 60 https://smaugmuds.afkmods.com/topic/ipv6-4537/&p=24367#p24367 It would need to be an OS that's at least 20 years old before this would become an issue. That's a vanishingly unlikely scenario for someone to be in these days. I honestly figured Cygwin would be where the problems would arise but it handled it like a beast. https://smaugmuds.afkmods.com/topic/ipv6-4537/&p=24367#p24367 Sat, 25 Jan 2025 22:45:49 CST Coding nobody@example.com (Samson) https://smaugmuds.afkmods.com/topic/ipv6-4537/&p=24366#p24366 Fair enough. :shrug: I'll agree to disagree on portability, since I thought the principle argument against a dual stack socket was that not all (legacy) OS would support it, instead requiring an approach with multiple sockets (like the RFC was showing). That said, it's not my base to maintain and I suppose few people will try and compile and run this on hardware that ancient. Guess we'll find out if they do, should they find themselves here asking for support. :imp: https://smaugmuds.afkmods.com/topic/ipv6-4537/&p=24366#p24366 Mon, 20 Jan 2025 12:38:29 CST Coding nobody@example.com (GatewaySysop) https://smaugmuds.afkmods.com/topic/ipv6-4537/&p=24364#p24364 Also for the record I've now gotten AFKMud to compile under Cygwin again (damn libraries) and confirmed that even on my Windows 10 Home PC that the code bound both addresses and accepted a connection from another PC in the house. Neither of which get assigned IPv6 addresses because our router is so backward it doesn't even support it at all. I don't think portability is an issue here. It's just a matter of getting the DNS resolver process to play along now. https://smaugmuds.afkmods.com/topic/ipv6-4537/&p=24364#p24364 Mon, 20 Jan 2025 00:09:52 CST Coding nobody@example.com (Samson) https://smaugmuds.afkmods.com/topic/ipv6-4537/&p=24363#p24363 I had a look at the RFC, and I really can't make heads or tails of what it's trying to say. So I did some more digging and everything I'm turning up says that the function I posted will work just fine on a server that only supports IPv4. It simply won't be able to bind the IPv6 part to the port. There is nothing out there to indicate that the code would refuse to work at all. They all simply say you'd only get one type or the other in a single protocol setup. They also said if you run into https://smaugmuds.afkmods.com/topic/ipv6-4537/&p=24363#p24363 Sun, 19 Jan 2025 23:04:38 CST Coding nobody@example.com (Samson) https://smaugmuds.afkmods.com/topic/ipv6-4537/&p=24362#p24362 Do have a look at the RFC I linked in my edited post. I think that's a good way to go, albeit a bit more complicated. Should allow one to have their cake and eat it too, from a portability perspective. :cool: https://smaugmuds.afkmods.com/topic/ipv6-4537/&p=24362#p24362 Sun, 19 Jan 2025 01:02:23 CST Coding nobody@example.com (GatewaySysop) https://smaugmuds.afkmods.com/topic/ipv6-4537/&p=24361#p24361 I don't have an exclusively IPv4 setup to test it on aside from my personal PC. However, the impression I got from the information I gathered (not from the AI btw) was that setting things up this way should still work because you aren't specifying a particular address. You're simply binding to the machine itself. If you have a machine where you can try this that doesn't have an IPv6 address assigned at all then we'd know for sure. The function I posted should be usable on regular SmaugFUSS to https://smaugmuds.afkmods.com/topic/ipv6-4537/&p=24361#p24361 Sun, 19 Jan 2025 00:20:23 CST Coding nobody@example.com (Samson) https://smaugmuds.afkmods.com/topic/ipv6-4537/&p=24360#p24360 I guess my point (my question?) was what happens if someone with an OS that doesn't have IPv6 support tries to compile and run the mud? Guessing if it's exclusively trying to do IPv6 (and listen for both v6 and v4 traffic) that it's going to puke its guts and not work, right? For the sake or portability, wouldn't you want a solution that works whether the user is compiling on a machine with IPv4 or IPv6 support? Again forgive me if I'm off base here, but that's where my question was coming fr https://smaugmuds.afkmods.com/topic/ipv6-4537/&p=24360#p24360 Sun, 19 Jan 2025 00:08:46 CST Coding nobody@example.com (GatewaySysop) https://smaugmuds.afkmods.com/topic/ipv6-4537/&p=24359#p24359 If all you want is IPv4 only then there's no reason to use the changes I've made. You'd just stick to what you have already. The whole idea was that we wanted a way for a system to run both IPv4 and IPv6. The code I've posted does this. If you just want IPv6, then all you have to do is set the ipv6only value to 1 instead of 0. The operating systems these days all have IPv6 support so I'd imagine that it will listen on both sides but if you only have an IPv4 address it would only ever respo https://smaugmuds.afkmods.com/topic/ipv6-4537/&p=24359#p24359 Sat, 18 Jan 2025 23:28:38 CST Coding nobody@example.com (Samson) https://smaugmuds.afkmods.com/topic/ipv6-4537/&p=24358#p24358 Maybe this is a dumb question, but will this still work on a machine that is on IPv4 or is this [i]only [/i]so that a mud with IPv6 connectivity can listen on IPv4 [b]and [/b]IPv6, as you demonstrated it doing? Is this still going to be able to listen for IPv4 (only, obviously) on an IPv4 connected machine? At first glance it doesn't appear so, but maybe I'm ignorant or overthinking it. I was poking around some time ago with something like this instead: [url=https://datatracker.ietf.org/d https://smaugmuds.afkmods.com/topic/ipv6-4537/&p=24358#p24358 Sat, 18 Jan 2025 19:55:12 CST Coding nobody@example.com (GatewaySysop) https://smaugmuds.afkmods.com/topic/ipv6-4537/&p=24354#p24354 So I know this is literally a decade old topic now, but as I was going through old posts I stumbled on this and decided to have a go at it - with the help of Google's Search AI. Yes, I know, trusting AI etc. I only used what it told me as an example. In doing so, this is what I currently have for init_socket(): [code]int init_socket( int mudport ) { struct sockaddr_in6 serv_addr6; int x = 1, ipv6only = 0; int fd; if( ( fd = socket( AF_INET6, SOCK_STREAM, 0 ) ) < 0 ) { https://smaugmuds.afkmods.com/topic/ipv6-4537/&p=24354#p24354 Sat, 18 Jan 2025 01:49:51 CST Coding nobody@example.com (Samson)