From b1b66df37c0b05ba05d9636234bad0cc02a1bd03 Mon Sep 17 00:00:00 2001 From: Martin Sustrik Date: Thu, 21 Jan 2010 12:07:42 +0100 Subject: PGM man page improved --- man/man7/zmq_pgm.7 | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'man/man7') diff --git a/man/man7/zmq_pgm.7 b/man/man7/zmq_pgm.7 index fb37735..6d70a56 100644 --- a/man/man7/zmq_pgm.7 +++ b/man/man7/zmq_pgm.7 @@ -18,6 +18,14 @@ socket option. PGM transport can be used only with ZMQ_PUB and ZMQ_SUB sockets. +Caution: PGM protocol runs directly on top of IP protocol and thus needs to +open raw IP socket. On some operating systems this operation requires special +privileges. On Linux, for example, you would need to either run your application +as root or set adequate capabilities for your executable. Alternative approach +is to use UDP transport, +.IR zmq_udp(7) , +that stacks PGM on top of UDP and thus needs no special privileges. + .SH CONNECTION STRING Connection string for PGM transport is "pgm://" followed by an IP address -- cgit v1.2.3