diff options
Diffstat (limited to 'src/core/transport.h')
| -rw-r--r-- | src/core/transport.h | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/src/core/transport.h b/src/core/transport.h index 11cdcf99..78cb2bbf 100644 --- a/src/core/transport.h +++ b/src/core/transport.h @@ -1,5 +1,6 @@ // -// Copyright 2016 Garrett D'Amore <garrett@damore.org> +// Copyright 2017 Garrett D'Amore <garrett@damore.org> +// Copyright 2017 Capitar IT Group BV <info@capitar.com> // // This software is supplied under the terms of the MIT License, a // copy of which should be located in the distribution where this @@ -14,6 +15,11 @@ // interfaces in this file. struct nni_tran { + // tran_version is the version of the transport ops that this + // transport implements. We only bother to version the main + // ops vector. + uint32_t tran_version; + // tran_scheme is the transport scheme, such as "tcp" or "inproc". const char *tran_scheme; @@ -32,6 +38,17 @@ struct nni_tran { void (*tran_fini)(void); }; +// We quite intentionally use a signature where the upper word is nonzero, +// which ensures that if we get garbage we will reject it. This is more +// likely to mismatch than all zero bytes would. The actual version is +// stored in the lower word; this is not semver -- the numbers are just +// increasing - we doubt it will increase more than a handful of times +// during the life of the project. If we add a new version, please keep +// the old version around -- it may be possible to automatically convert +// older versions in the future. +#define NNI_TRANSPORT_V0 0x54520000 +#define NNI_TRANSPORT_VERSION NNI_TRANSPORT_V0 + // Endpoint operations are called by the socket in a protocol-independent // fashion. The socket makes individual calls, which are expected to block // if appropriate (except for destroy). Endpoints are unable to call back |