On Thu, Apr 17, 2014 at 9:17 AM, Todd Lyons <[email protected]> wrote: > >>> > Note that this probably marks the death of protocol v2 that nobody >>> > implemented >>> > yet, but that was supposed to be easier to parse... >>> Exim git HEAD has support (for the forthcoming 4.83 release) for Proxy >>> Protocol, when built with EXPERIMENTAL_PROXY. This includes support for >>> proxy protocols 1 and 2 both. (This is Exim as a server sat behind a >> supported V2. So actually Exim can probably proudly claim to be the first >> one to implement v2 :-) > We can't claim it yet. I recall when I worked on this that I just > threw in some skeleton code for v2. Yesterday I verified that the v2 > code does not work, so I'm in the process of fixing it.
Fixed. Merged to master. > Personally I prefer the text based one (PROXYv1), but maybe that just means > I'm > a little masochistic. I've backed off that position a little. :-) The v2 code to handle incoming connections is much cleaner and more readable than the v1 code. But I still like the troubleshooting ability that v1 affords with a simple packet sniffer and no required mental math. I also wanted to mention that I wrote a perl script proxy_protocol_client.pl which can be used to test a server for its Proxy Protocol support (i.e. it emulates the proxy). It exercises both v1 and v2 (default) with both ipv4 (default) and ipv6 addresses. If you don't pass any ip:port to send, it uses some default (hardcoded) source and destination ip:port combinations. It is interactive with STDIN/STDOUT, so you can pipe some other app to it to generate the protocol traffic appropriate for the service that the proxy is handling. I wrote the script for testing Exim with smtp, but it will work for any other protocol because it does not parse the content in any way. Personally I found it very useful to test and diagnose bugs with my Proxy Protocol negotiation code, and hopefully someone else will too. http://git.exim.org/exim.git/blob_plain/eb57651e8badf0b65af0371732e42f2ee5c7772c:/src/util/proxy_protocol_client.pl ...Todd
