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Index: tests/sys/netgraph/Makefile
===================================================================
--- tests/sys/netgraph/Makefile
+++ tests/sys/netgraph/Makefile
@@ -11,8 +11,10 @@
TEST_METADATA.ng_macfilter_test+= required_programs="perl"
ATF_TESTS_C+= basic \
+ hub \
SRCS.basic= basic.c util.c
+SRCS.hub= hub.c util.c
LIBADD+= netgraph
Index: tests/sys/netgraph/hub.c
===================================================================
--- /dev/null
+++ tests/sys/netgraph/hub.c
@@ -0,0 +1,168 @@
+/*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * Copyright 2021 Lutz Donnerhacke
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ * 3. Neither the name of the copyright holder nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+ * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+ * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+#include <atf-c.h>
+#include <errno.h>
+#include <stdio.h>
+
+#include "util.h"
+
+static void get_data(void *data, size_t len, void *ctx);
+
+ATF_TC_WITHOUT_HEAD(basic);
+ATF_TC_BODY(basic, dummy)
+{
+ char msg[] = "test";
+ int received;
+
+ ng_init();
+ ng_mkpeer(".", "a", "hub", "a");
+ ng_name("a", "hub");
+ ng_connect(".", "b", "hub:", "b");
+ ng_connect(".", "c", "hub:", "c");
+
+ /* do not bounce back */
+ ng_register_data("a", get_data);
+ received = 0;
+ ng_send_data("a", msg, sizeof(msg));
+ ng_handle_events(50, &received);
+ ATF_CHECK(received == 0);
+
+ /* send to others */
+ ng_register_data("b", get_data);
+ ng_register_data("c", get_data);
+ received = 0;
+ ng_send_data("a", msg, sizeof(msg));
+ ng_handle_events(50, &received);
+ ATF_CHECK(received == 2);
+
+ received = 0;
+ ng_send_data("b", msg, sizeof(msg));
+ ng_handle_events(50, &received);
+ ATF_CHECK(received == 2);
+
+ received = 0;
+ ng_send_data("c", msg, sizeof(msg));
+ ng_handle_events(50, &received);
+ ATF_CHECK(received == 2);
+
+ /* remove a link */
+ ng_rmhook(".", "b");
+ received = 0;
+ ng_send_data("a", msg, sizeof(msg));
+ ng_handle_events(50, &received);
+ ATF_CHECK(received == 1);
+
+ ng_shutdown("hub:");
+}
+
+ATF_TC_WITHOUT_HEAD(persistence);
+ATF_TC_BODY(persistence, dummy)
+{
+ ng_init();
+ ng_mkpeer(".", "a", "hub", "a");
+ ng_name("a", "hub");
+
+ ng_send_msg("hub:", "setpersistent");
+ ng_rmhook(".", "a");
+
+ ng_shutdown("hub:");
+}
+
+ATF_TC_WITHOUT_HEAD(loop);
+ATF_TC_BODY(loop, dummy)
+{
+ int received, i;
+ char msg[] = "LOOP Alert!";
+
+ ng_init();
+ ng_mkpeer(".", "a", "hub", "a");
+ ng_name("a", "hub1");
+ ng_mkpeer(".", "b", "hub", "b");
+ ng_name("b", "hub2");
+
+ ng_register_data("a", get_data);
+ ng_register_data("b", get_data);
+
+ /*
+ * Open loop
+ *
+ * /-- hub1
+ * . < |
+ * \-- hub2
+ */
+ ng_connect("hub1:", "xc1", "hub2:", "xc1");
+
+ received = 0;
+ ng_send_data("a", msg, sizeof(msg));
+ ng_handle_events(50, &received);
+ ATF_CHECK(received == 1);
+
+ /*
+ * Closed loop, DANGEROUS!
+ *
+ * /-- hub1 -\
+ * . < | |
+ * \-- hub2 -/
+ */
+ ng_connect("hub1:", "xc2", "hub2:", "xc2");
+
+ received = 0;
+ ng_send_data("a", msg, sizeof(msg));
+ for(i = 0; i < 10; i++) /* don't run forever */
+ if (!ng_handle_event(50, &received))
+ break;
+ ATF_CHECK(received > 7);
+
+ ng_shutdown("hub1:");
+ ng_shutdown("hub2:");
+}
+
+ATF_TP_ADD_TCS(basic)
+{
+ ATF_TP_ADD_TC(basic, basic);
+ ATF_TP_ADD_TC(basic, loop);
+ ATF_TP_ADD_TC(basic, persistence);
+
+ return atf_no_error();
+}
+
+static void
+get_data(void *data, size_t len, void *ctx)
+{
+ int *cnt = ctx;
+
+ (void)data;
+ printf("Got %zu bytes of data.\n", len);
+ (*cnt)++;
+}

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