diff options
author | Martin Sustrik <sustrik@250bpm.com> | 2011-06-22 11:02:16 +0200 |
---|---|---|
committer | Martin Sustrik <sustrik@250bpm.com> | 2011-06-22 11:02:16 +0200 |
commit | ec81f8fb2523e1e2fe45eaadc05311a35bf551d7 (patch) | |
tree | e6fbd9b7a789d72678fa02ca06883de15a932beb /src/random.cpp | |
parent | 10a93bb79fd3d4be1b3ffedfa6785564fbcc082b (diff) |
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 <sustrik@250bpm.com>
Diffstat (limited to 'src/random.cpp')
-rw-r--r-- | src/random.cpp | 39 |
1 files changed, 39 insertions, 0 deletions
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 <http://www.gnu.org/licenses/>. +*/ + +#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; +} |