Add a test for a constellation of three nodes.

In particular, test whether two nodes that have been introduced to each
other via a third node can still continue to communicate with each other
when the third node goes offline.

diff --git a/test/Makefile.am b/test/Makefile.am
index 5f8921c903bb64b780a29c0d3faf537527e15bf4..c9a660248b547940d999d6cfc8801645104867f7 100644 (file)
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -1,6 +1,7 @@
 TESTS = \
        basic.test \
        basicpp.test \
+       trio.test \
        channels.test \
        channels-fork.test \
        channels-cornercases.test \
@@ -15,6 +16,7 @@ AM_CPPFLAGS = -I../src
 check_PROGRAMS = \
        basic \
        basicpp \
+       trio \
        channels \
        channels-fork \
        channels-cornercases \
@@ -29,6 +31,9 @@ basic_LDADD = ../src/libmeshlink.la
 basicpp_SOURCES = basicpp.cpp
 basicpp_LDADD = ../src/libmeshlink.la
 
+trio_SOURCES = trio.c
+trio_LDADD = ../src/libmeshlink.la
+
 channels_SOURCES = channels.cpp
 channels_LDADD = ../src/libmeshlink.la
 

diff --git a/test/trio.c b/test/trio.c
new file mode 100644 (file)
index 0000000..0a494c2
--- /dev/null
+++ b/test/trio.c
@@ -0,0 +1,118 @@
+#define _GNU_SOURCE
+
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <assert.h>
+
+#include "meshlink.h"
+#include "utils.h"
+
+static void log_cb(meshlink_handle_t *mesh, meshlink_log_level_t level, const char *text) {
+       static struct timeval tv0;
+       struct timeval tv;
+
+       if(tv0.tv_sec == 0)
+               gettimeofday(&tv0, NULL);
+       gettimeofday(&tv, NULL);
+       fprintf(stderr, "%u.%.03u ", (unsigned int)(tv.tv_sec - tv0.tv_sec), (unsigned int)tv.tv_usec / 1000);
+
+       if(mesh)
+               fprintf(stderr, "(%s) ", mesh->name);
+       fprintf(stderr, "[%d] %s\n", level, text);
+}
+
+static bool received = false;
+
+static void receive_cb(meshlink_handle_t *mesh, meshlink_node_t *source, const void *data, size_t len) {
+       fprintf(stderr, "RECEIVED SOMETHING\n");
+       if(len == 5 && !memcmp(data, "Hello", 5))
+               received = true;
+}
+
+int main(int argc, char *argv[]) {
+       // Create three instances.
+
+       const char *name[3] = {"foo", "bar", "baz"};
+       meshlink_handle_t *mesh[3];
+       char *data[3];
+
+       for(int i = 0; i < 3; i++) {
+               char *path;
+               asprintf(&path, "trio_conf.%d", i);
+               assert(path);
+
+               mesh[i] = meshlink_open(path, name[i], "trio", DEV_CLASS_BACKBONE);
+               assert(mesh[i]);
+
+               data[i] = meshlink_export(mesh[i]);
+               assert(data[i]);
+       }
+
+       // first node knows the two other nodes
+
+       for(int i = 1; i < 3; i++) {
+               assert(meshlink_import(mesh[i], data[0]));
+               assert(meshlink_import(mesh[0], data[i]));
+
+               assert(meshlink_get_node(mesh[i], name[0]));
+               assert(meshlink_get_node(mesh[0], name[i]));
+       }
+
+       // second and third node should not know each other yet
+
+       assert(!meshlink_get_node(mesh[1], name[2]));
+       assert(!meshlink_get_node(mesh[2], name[1]));
+
+       // start the nodes
+
+       for(int i = 0; i < 3; i++)
+               meshlink_start(mesh[i]);
+
+       // the nodes should now learn about each other
+
+       assert_after(meshlink_get_node(mesh[1], name[2]), 5);
+       assert_after(meshlink_get_node(mesh[2], name[1]), 5);
+
+       // Send a packet
+
+       meshlink_set_receive_cb(mesh[1], receive_cb);
+       assert_after((meshlink_send(mesh[2], meshlink_get_node(mesh[2], name[1]), "Hello", 5), received), 15);
+
+       // Stop the first node
+
+       meshlink_stop(mesh[0]);
+       sleep(1);
+
+       // Communication should still be possible
+
+       assert_after((meshlink_send(mesh[2], meshlink_get_node(mesh[2], name[1]), "Hello", 5), received), 15);
+
+       // Stop the other nodes
+
+       for(int i = 1; i < 3; i++)
+               meshlink_stop(mesh[i]);
+
+       sleep(1);
+
+       // Start just the other two nodes
+
+       meshlink_set_log_cb(mesh[1], MESHLINK_DEBUG, log_cb);
+
+       for(int i = 1; i < 3; i++)
+               meshlink_start(mesh[i]);
+
+       assert(meshlink_get_node(mesh[1], name[2]));
+       assert(meshlink_get_node(mesh[2], name[1]));
+
+       // Communication should still be possible
+
+       received = false;
+       assert_after((meshlink_send(mesh[2], meshlink_get_node(mesh[2], name[1]), "Hello", 5), received), 25);
+
+       // Clean up.
+
+       for(int i = 0; i < 3; i++)
+               meshlink_close(mesh[i]);
+}

diff --git a/test/trio.test b/test/trio.test
new file mode 100755 (executable)
index 0000000..f0639fd
--- /dev/null
+++ b/test/trio.test
@@ -0,0 +1,4 @@
+#!/bin/sh
+
+rm -Rf trio_conf.*
+./trio

diff --git a/test/utils.h b/test/utils.h
index e1073df8f7e8468c1ee0936dc7d0c0c6323c912f..488721dd37af86748e9642879cad1da8588725d9 100644 (file)
--- a/test/utils.h
+++ b/test/utils.h
@@ -25,5 +25,14 @@ extern void stop_meshlink_pair(meshlink_handle_t *a, meshlink_handle_t *b);
 /// Stop and cleanup a pair of meshlink instances.
 extern void close_meshlink_pair(meshlink_handle_t *a, meshlink_handle_t *b, const char *prefix);
 
-#endif
+#define assert_after(cond, timeout) do {\
+       for(int i = 0; i++ <= timeout;) {\
+               if(cond)\
+                       break;\
+               if(i == timeout)\
+                       assert(cond);\
+               sleep(1);\
+       }\
+} while(0);
 
+#endif