fixes #143 Protocols and transports should be "configurable"

This makes all the protocols and transports optional.  All
of them except ZeroTier are enabled by default, but you can
now disable them (remove from the build) with cmake options.

The test suite is modified so that tests still run as much
as they can, but skip over things caused by missing functionality
from the library (due to configuration).

Further, the constant definitions and prototypes for functions
that are specific to transports or protocols are moved into
appropriate headers, which should be included directly by
applications wishing to use these.

We have also added and improved documentation -- all of the
transports are documented, and several more man pages for
protocols have been added.  (Req/Rep and Surveyor are still
missing.)

1 files changed, 52 insertions, 0 deletions

diff --git a/tests/trantest.h b/tests/trantest.h
index 37763d24..d334c257 100644
--- a/tests/trantest.h
+++ b/tests/trantest.h
@@ -11,6 +11,8 @@
 #include "convey.h"
 #include "core/nng_impl.h"
 #include "nng.h"
+#include "protocol/reqrep0/rep.h"
+#include "protocol/reqrep0/req.h"
 #include <stdlib.h>
 #include <string.h>
 
@@ -30,9 +32,54 @@ unsigned trantest_port = 0;
 
 typedef int (*trantest_proptest_t)(nng_msg *, nng_listener, nng_dialer);
 
+#ifndef NNG_HAVE_ZEROTIER
+#define nng_zt_register notransport
+#endif
+#ifndef NNG_HAVE_INPROC
+#define nng_inproc_register notransport
+#endif
+#ifndef NNG_HAVE_IPC
+#define nng_ipc_register notransport
+#endif
+#ifndef NNG_HAVE_TCP
+#define nng_tcp_register notransport
+#endif
+
+int
+notransport(void)
+{
+	ConveySkip("Transport not configured");
+	return (NNG_ENOTSUP);
+}
+
+#define CHKTRAN(s, t)                      \
+	if (strncmp(s, t, strlen(t)) == 0) \
+	notransport()
+
+void
+trantest_checktran(const char *url)
+{
+#ifndef NNG_HAVE_ZEROTIER
+	CHKTRAN(url, "zt:");
+#endif
+#ifndef NNG_HAVE_INPROC
+	CHKTRAN(url, "inproc:");
+#endif
+#ifndef NNG_HAVE_IPC
+	CHKTRAN(url, "ipc:");
+#endif
+#ifndef NNG_HAVE_TCP
+	CHKTRAN(url, "tcp:");
+#endif
+
+	(void) url;
+}
+
 void
 trantest_next_address(char *out, const char *template)
 {
+	trantest_checktran(template);
+
 	if (trantest_port == 0) {
 		char *pstr;
 		trantest_port = 5555;
@@ -56,11 +103,16 @@ void
 trantest_init(trantest *tt, const char *addr)
 {
 	trantest_next_address(tt->addr, addr);
+
+#if defined(NNG_HAVE_REQ0) && defined(NNG_HAVE_REP0)
 	So(nng_req_open(&tt->reqsock) == 0);
 	So(nng_rep_open(&tt->repsock) == 0);
 
 	tt->tran = nni_tran_find(addr);
 	So(tt->tran != NULL);
+#else
+	ConveySkip("Missing REQ or REP protocols");
+#endif
 }
 
 void