** Description changed: Binary package hint: netcat Netcat falls short of it's self-proclaimed swiss armyknife status. I want it to listen on a port and report any UDP packets recieved on that port. However, after sending one UDP packet only packets from that single host/port - that sent the first packet are accepted. The code mentions: + that sent the first packet are accepted. The code mentions: /* I'm not completely clear on how this works -- BSD seems to make UDP - just magically work in a connect()ed context, but we'll undoubtedly run - into systems this deal doesn't work on. For now, we apparently have to - issue a connect() on our just-tickled socket so we can write() back. - Again, why the fuck doesn't it just get filled in and taken care of?! - This hack is anything but optimal. Basically, if you want your listener - to also be able to send data back, you need this connect() line, which - also has the side effect that now anything from a different source or even a - different port on the other end won't show up and will cause ICMP errors. - I guess that's what they meant by "connect". - Let's try to remember what the "U" is *really* for, eh? */ - rr = connect (nnetfd, (SA *)remend, sizeof (SA)); + just magically work in a connect()ed context, but we'll undoubtedly run + into systems this deal doesn't work on. For now, we apparently have to + issue a connect() on our just-tickled socket so we can write() back. + Again, why doesn't it just get filled in and taken care of?! + This hack is anything but optimal. Basically, if you want your listener + to also be able to send data back, you need this connect() line, which + also has the side effect that now anything from a different source or even a + different port on the other end won't show up and will cause ICMP errors. + I guess that's what they meant by "connect". + Let's try to remember what the "U" is *really* for, eh? */ + rr = connect (nnetfd, (SA *)remend, sizeof (SA)); So.... This "connect" is the one I want/need to have removed. I suggest making - a new option for this. (just removing this connect line will make ME happy today, - but others will probably depend on it being there... + a new option for this. (just removing this connect line will make ME happy today, + but others will probably depend on it being there... Ubuntu-9.04 / 9.10 [v1.10-38]
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/530278 Title: Swiss armyknife can't do what I want. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/netcat/+bug/530278/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
