Unix datagram sockets: How to use stream_socket_sendto

MarkR

Hi there,

I have not managed to make stream_socket_sendto work with any address, with Unix Datagram sockets (ugd:///some/file/path)

Does anybody know the correct syntax for doing this, or has managed to get this to work.

What I want to do is to broadcast a message to several sockets in the same directory. This should be straightforward but I've no idea how to make stream_socket_sendto work with udg.

I've tried

stream_socket_sendto($sock, $msg, 0 /* flags */, "udg://$sockpath");

and

stream_socket_sendto($sock, $msg, 0 /* flags */, "unix://$sockpath");

as well as

stream_socket_sendto($sock, $msg, 0 /* flags */, "unix://$sockpath:0");

all of which fail with the error:

Warning:stream_socket_sendto() [function.stream-socket-sendto]: php_network_getaddresses: getaddrinfo failed: Name or service not known'

And also produces the warning
Warning: stream_socket_sendto() [function.stream-socket-sendto]: Failed to parse `udg:///home/mark/progs/site/sockets/2735.udg' into a valid network address in /home/mark/progs/site/udgclient.php on line 37

Mark

dalecosp

Is stream_socket_client() returning a valid stream resource?

[edit]I'm assuming yes, but just checking. If you're messing with sockets, you are not, usually, any type of newbie, eh?[/edit]

MarkR

Yes, stream_socket_client (Actually I was using stream_socket_server) is returning a valid resource.

I found the problem and used a workaround. stream_socket_sendto only supports IP addresses, therefore can't be used to send anything with Unix sockets.

The work-around is to open one socket for each destination I want to send a message to. It's clumsy, but effective.

I also posted a bug saying that this didn't work with unix sockets.

But seeing as sendto() can only reasonably be used with datagram sockets, and hardly anyone seems to use datagram sockets (UDP or unix datagram), I guess it's not their priority.

Mark

dalecosp

Might I suggest that you add a "user contributed" note to the manual page at php.net for this function?

The function's page is very sparse in terms of detail, and the fact that this function doesn't support Unix sockets would be an excellent edition to the material presented there, especially in light of the fact that most of the related function do explicity state that Unix sockets on the filesystem are supported in one way or another....