Done.
On Mon, Aug 25, 2014 at 1:22 AM, Pieter Hintjens <[email protected]> wrote: > Steve, > > Nice, especially the randomization. Would you send this back to CZMQ > as a pull request? > > -Pieter > > On Mon, Aug 25, 2014 at 8:10 AM, Steve Murphy <[email protected]> wrote: > > Hello--- > > > > I've got a fork of czmq wherein I added code to give developers > > a little more control over "ephemeral" ports. (You know, where > > port is specified as "*" in "tcp://1.2.3.4:*" > > > > Normally, the * notation for a port means for the software to > > pick the first free port in the range C000 to FFFF (49152 to 65535. > iirc). > > > > With this extension, you can now say: > > > > tcp://*:*[50123-52123] > > > > interpreted: bind to all interfaces; choose the first open port in > the > > range between 50123 and 52123. > > > > tcp://*:![40000-50000] > > interpreted: bind to all interfaces; choose a random port between > > 40-thousand > > and 50-thousand. > > > > This is done for both zsock and zsocket classes. Documentation updated. > > Self-tests > > added. > > > > HUH? WHY did you do this? WHY the HECK would this be useful? > > > > Short answers: > > a. I'm a crazy guy doing crazy things. > > b. Someday, maybe, maybe not, someone might have a cool, nifty > zero-day > > exploit against zeromq sockets. They might even know the best > place > > to > > look for sockets would be at the beginning of the range 49152 to > > 64K. Why > > make it easy for them to find your sockets? > > c. Random port assignments (in this case, using the "!" instead of > "*", > > might be a little faster than the "first free port" search, > > especially > > if you request lots of ephemeral ports. Unless the range > > is very crowded, "!" will most likely find a free port on the > first > > attempt. > > > > I tested this code using some simple test sets. > > > > Check it out! See: https://github.com/WyoMurf/czmq.git > > > > murf > > > > -- > > > > Steve Murphy > > ParseTree Corporation > > 57 Lane 17 > > Cody, WY 82414 > > ✉ murf at parsetree dot com > > ☎ 307-899-5535 > > > > > > > > _______________________________________________ > > zeromq-dev mailing list > > [email protected] > > http://lists.zeromq.org/mailman/listinfo/zeromq-dev > > > _______________________________________________ > zeromq-dev mailing list > [email protected] > http://lists.zeromq.org/mailman/listinfo/zeromq-dev > -- Steve Murphy ParseTree Corporation 57 Lane 17 Cody, WY 82414 ✉ murf at parsetree dot com ☎ 307-899-5535
_______________________________________________ zeromq-dev mailing list [email protected] http://lists.zeromq.org/mailman/listinfo/zeromq-dev
