qpb: Add support for protobuf.
Infrastructure that allows protocol buffers to be used in Quagga. The
changes below comprise of:
- Build hooks
- Protobuf definitions for common types.
- Library routines for working with protobuf, including functions
that help translate between common quagga types and their protobuf
equivalents.
Changes:
* qpb/{Makefile.am,README.txt,qpb.h,.gitignore}
Add the qpb library, which provides shared code and definitions
for using protocol buffers in quagga code.
* qpb/qpb.proto
Protobuf definitions that can be shared by all of quagga.
* qpb/linear_allocator.h
An allocator that allocates memory by walking down towards the end
of a buffer. This is used to cheaply allocate/deallocate memory on
the stack for protobuf operations.
* qpb/qpb_allocator.[ch]
Thin layer that allows a linear allocator to be used with the
protobuf-c library.
* common.am
This is an automake fragment that is intended to be shared by
Makefile.am files in the tree. It currently includes definitions
related to protobuf.
* configure.ac
- Add logic to optionally build protobuf code.
By default, protobuf support is enabled if the protobuf C
compiler (protoc-c) is available, and the associated header
files/library can be found.
The user can choose to override this behavior via the new
--disable-protobuf/--enable-protobuf flags.
- Include the quagga protobuf library (qpb) in the build.
* .gitignore
Ignore source code generated by protobuf compiler.
* Makefile.am
Add 'qpb' to the list of subdirectories.
Signed-off-by: Avneesh Sachdev <avneesh@sproute.com>
Edited: Paul Jakma <paul.jakma@hpe.com>: Change the sense of the
configure enable option to require explicit specifying, as
an experimental feature.
diff --git a/common.am b/common.am
new file mode 100644
index 0000000..ac7a323
--- /dev/null
+++ b/common.am
@@ -0,0 +1,41 @@
+#
+# Automake fragment intended to be shared by Makefile.am files in the
+# tree.
+#
+
+if HAVE_PROTOBUF
+
+# Uncomment to use an non-system version of libprotobuf-c.
+#
+# Q_PROTOBUF_C_CLIENT_INCLUDES = -I$(top_srcdir)/third-party/protobuf-c/src
+# Q_PROTOBUF_C_CLIENT_LDOPTS = $(top_builddir)/third-party/protobuf-c/src/libprotobuf-c.la
+
+Q_PROTOBUF_C_CLIENT_INCLUDES=
+Q_PROTOBUF_C_CLIENT_LDOPTS=-lprotobuf-c
+
+Q_PROTOC=protoc
+Q_PROTOC_C=protoc-c
+
+Q_PROTOBUF_CFILES = $(filter %.pb-c.c,$(SOURCES))
+
+Q_PROTOBUF_SRCS = $(Q_PROTOBUF_CFILES) $(Q_PROTOBUF_HFILES)
+
+# Rules
+%.pb.h: %.proto
+ $(Q_PROTOC) $(PROTOBUF_INCLUDES) --cpp_out=$(top_srcdir) $(top_srcdir)/$(PROTOBUF_PACKAGE)/$^
+
+%.pb-c.c %.pb-c.h: %.proto
+ $(Q_PROTOC_C) $(PROTOBUF_INCLUDES) --c_out=$(top_srcdir) $(top_srcdir)/$(PROTOBUF_PACKAGE)/$^
+
+#
+# Information about how to link to various libraries.
+#
+Q_QUAGGA_PB_CLIENT_LDOPTS = $(top_srcdir)/qpb/libquagga_pb.la $(Q_PROTOBUF_C_CLIENT_LDOPTS)
+
+Q_FPM_PB_CLIENT_LDOPTS = $(top_srcdir)/fpm/libfpm_pb.la $(Q_QUAGGA_PB_CLIENT_LDOPTS)
+
+endif # HAVE_PROTOBUF
+
+Q_CLEANFILES = $(Q_PROTOBUF_SRCS)
+
+Q_BUILT_SRCS = $(Q_PROTOBUF_SRCS)