Hi Christian,

I attach the first attempt on SO_REUSEPORT. The patch is available
either at https://github.com/foxik/libmicrohttpd/commit/9ce9422742e10458f87275ea202a982e00c2b88c
or attached. (It is against the version with
MHD_DAEMON_OPTION_CURRENT_CONNECTIONS, but I can rebase it to current
SVN HEAD if you want.)

It seems that a reasonably multiplatform way of detecting SO_REUSEPORT is
  #ifdef SO_REPOSEPORT
which is used for example by Perl. For SO_EXCLUSIVEADDRUSE, the same
strategy seems to work too, according to Windows SDK headers and MinGW
WinAPI headers.

The current patch adds an option to allowing/disallowing address:port
reuse. One remark:
- currently both nonexisting SO_xxx and setsockopt failure are fatal and
  MHD_start_daemon fails. That may be too harsh -- maybe the
  MHD_OPTION_LISTENING_ADDRESS_REUSE should be only a hint.

  Nevertheless, as one can freely not use
  MHD_OPTION_LISTENING_ADDRESS_REUSE option, I chose the "fail on error"
  behaviour.

Thanks,
cheers,
Milan Straka

Original patch modified to get rid of some redundant USE_DEBUG
checks, fix indentation, and #ifndef SO_REUSEPORT on Linux,
we try be #defining it to 15 ourselves.

1 files changed, 5 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index afbef967..e4af5f12 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed Oct 29 20:45:21 CET 2014
+        Adding MHD_OPTION_LISTENING_ADDRESS_REUSE option allowing clients
+        to force allowing re-use of the address:port combination
+        (SO_REUSEPORT). -MS
+
 Wed Oct 29 16:27:05 CET 2014
         Adding MHD_DAEMON_INFO_CURRENT_CONNECTIONS to allow clients
         to query the number of active connections. -MS