happy is a simple TCP happy eyeballs probing tool. It uses
connect() calls to establish connections concurrently
to a number of possible endpoints. This tool is particularly useful
to determine whether happy eyeball [RFC 6555] applications will use
IPv4 or IPv6 if both are available.
The build environment uses cmake and hence the code should be fairly portable. However, patches that improve portability of fix bugs are always welcome.
Build and Usage:
$ mkdir builddir $ cd builddir $ cmake .. $ make $ make install $ happy -ac www.ietf.org www.facebook.com www.bing.com www.ietf.org:80 www.ietf.org.cdn.cloudflare.net > 2400:cb00:2048:1::6814:155 www.ietf.org.cdn.cloudflare.net > 2400:cb00:2048:1::6814:55 www.ietf.org.cdn.cloudflare.net > 188.8.131.52 www.ietf.org.cdn.cloudflare.net > 184.108.40.206 www.facebook.com:80 star.c10r.facebook.com > 2a03:2880:f01c:d01:face:b00c::1 > edge-star6-shv-14-fra3.facebook.com star.c10r.facebook.com > 220.127.116.11 > edge-star-shv-14-fra3.facebook.com www.bing.com:80 any.edge.bing.com > 18.104.22.168 > a-0001.a-msedge.net www.ietf.org:80 2400:cb00:2048:1::6814:155 8.297 8.411 8.759 2400:cb00:2048:1::6814:55 8.573 8.767 8.573 22.214.171.124 12.824 14.677 14.584 126.96.36.199 12.794 14.573 12.746 www.facebook.com:80 2a03:2880:f01c:d01:face:b00c::1 8.678 8.471 8.902 188.8.131.52 9.268 8.441 8.285 www.bing.com:80 184.108.40.206 24.434 26.091 26.309
% happy -h Usage: happy [-a] [-b] [-c] [-p port] [-q nqueries] [-t timeout] [-d delay ] [-f file] [-s] [-m] hostname...
The description of each option is available in the man page:
$ man happy
The tool does not check whether the endpoints of a given target all provide the same service. Hence, it is possible to impact the results by setting up ’fake’ servers that do not provide the service tested and which are designed and deployed with the only purpose to provide fast connection setup times.
- Juergen Schoenwaelder <j.schoenwaelder AT jacobs‐university.de>
- Vaibhav Bajpai <v.bajpai AT jacobs‐university.de>
Copyright (c) 2013-2014, Juergen Schoenwaelder, Jacobs University Bremen Copyright (c) 2014, Vaibhav Bajpai, Jacobs University Bremen All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. The views and conclusions contained in the software and documentation are those of the authors and should not be interpreted as representing official policies, either expressed or implied, of the Leone Project or Jacobs University Bremen.