This introduces a new way of linking Serval executables and dynamic
libraries from static libraries like libservald.a -- called
"feature-driven" linking.
The Makefile now links servald and serval-tests from libservald.a,
rather than from an explicit list of object (.o) files. Thanks to the
section-based method for registering functions such as HTTP handlers,
CLI commands and MDP handlers, these object files had become
"stand-alone" and hence were no longer included in the link because
there was no unresolved reference that required them to be linked in.
The new "feature.h" provides the DECLARE_FEATURE(name) macro that each
stand-alone source file uses to declare the named feature(s) it
provides. Each executable can call the USE_FEATURE(name) macro in any
of its explicitly-linked source files to cause the corresponding
object(s) to be included in the link, eg, servald_features.c.
The DEFINE_BINDING() macro has been extended so that every individual
MDP binding is given a feature name based on its port number macro, eg,
"mdp_binding_MDP_PORT_ECHO".
Some features have been factored into their own separate source files so
they can be omitted or included in a build independently of each other:
- the MDP bindings for MDP_PORT_DNALOOKUP, MDP_PORT_ECHO,
MDP_PORT_TRACE, MDP_PORT_KEYMAPREQUEST, MDP_PORT_RHIZOME_xxx,
MDP_PORT_PROBE, MDP_PORT_STUN, MDP_PORT_STUNREQ
- the CLI "log" and "echo" commands
- the CLI "rhizome direct" command
The JNI source files are only compiled if the <jni.h> header is present,
otherwise they are omitted from libservald.so.
Move validation checks into new function rhizome_manifest_validate()
Remove rhizome_manifest 'errors' field
Replace rhizome_manifest 'warnings' with 'malformed'
Replace rhizome_manifest 'manifest_bytes' with 'manifest_body_bytes' and
refactor to use 'manifest_all_bytes' in all manifest i/o
Refactor rhizome_manifest_verify() and reverse sense of return value to
match rhizome_manifest_validate()
New function rhizome_manifest_inspect() -- lightweight manifest parser
used when receiving Rhizome advertisements
New 'rhizomeops' test case for invalid manifest "service" field values,
now passes
All ob_append_xxx(b,...) functions return void
ob_makespace() returns 1 if successful, 0 if not
Add ob_overrun(b) predicate to check for overrun after any number of
appends
