From ec81f8fb2523e1e2fe45eaadc05311a35bf551d7 Mon Sep 17 00:00:00 2001 From: Martin Sustrik Date: Wed, 22 Jun 2011 11:02:16 +0200 Subject: New wire format for REQ/REP pattern This patch introduces two changes: 1. 32-bit ID is used to identify the peer instead of UUID 2. REQ socket seeds the label stack with unique 32-bit request ID It also drops any replies with non-matching request ID Signed-off-by: Martin Sustrik --- src/random.cpp | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 src/random.cpp (limited to 'src/random.cpp') diff --git a/src/random.cpp b/src/random.cpp new file mode 100644 index 0000000..ee7a7fb --- /dev/null +++ b/src/random.cpp @@ -0,0 +1,39 @@ +/* + Copyright (c) 2007-2011 iMatix Corporation + Copyright (c) 2007-2011 Other contributors as noted in the AUTHORS file + + This file is part of 0MQ. + + 0MQ is free software; you can redistribute it and/or modify it under + the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + 0MQ is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with this program. If not, see . +*/ + +#include "random.hpp" +#include "uuid.hpp" +#include "err.hpp" + +// Here we can use different ways of generating random data, as avialable +// on different platforms. At the moment, we'll assume the UUID is random +// enough to use for that purpose. +void zmq::generate_random (void *buf_, size_t size_) +{ + // Collapsing an UUID into 4 bytes. + zmq_assert (size_ == 4); + uint32_t buff [4]; + generate_uuid ((void*) buff); + uint32_t result = buff [0]; + result ^= buff [1]; + result ^= buff [2]; + result ^= buff [3]; + *((uint32_t*) buf_) = result; +} -- cgit v1.2.3