--- /dev/null
+/*
+ node_sim_nut.c -- Implementation of Node Simulation for Meshlink Testing
+ for channel connections with respective to blacklisting their nodes
+ Copyright (C) 2019 Guus Sliepen <guus@meshlink.io>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along
+ with this program; if not, write to the Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <pthread.h>
+#include <assert.h>
+#include <signal.h>
+#include "../common/common_handlers.h"
+#include "../common/test_step.h"
+#include "../common/mesh_event_handler.h"
+#include "../common/network_namespace_framework.h"
+#include "../../utils.h"
+#include "node_sim_nut_01.h"
+
+#define CHANNEL_PORT 1234
+
+static bool blacklist_set;
+int total_reachable_callbacks_01;
+int total_unreachable_callbacks_01;
+int total_channel_closure_callbacks_01;
+bool channel_discon_case_ping;
+bool channel_discon_network_failure_01;
+bool channel_discon_network_failure_02;
+bool test_blacklist_whitelist_01;
+bool test_channel_restart_01;
+
+static struct sync_flag peer_reachable = {.mutex = PTHREAD_MUTEX_INITIALIZER, .cond = PTHREAD_COND_INITIALIZER};
+static struct sync_flag peer_unreachable = {.mutex = PTHREAD_MUTEX_INITIALIZER, .cond = PTHREAD_COND_INITIALIZER};
+static struct sync_flag channel_opened = {.mutex = PTHREAD_MUTEX_INITIALIZER, .cond = PTHREAD_COND_INITIALIZER};
+static struct sync_flag channels_closed = {.mutex = PTHREAD_MUTEX_INITIALIZER, .cond = PTHREAD_COND_INITIALIZER};
+
+static void node_status_cb(meshlink_handle_t *mesh, meshlink_node_t *node,
+ bool reachable) {
+
+ fprintf(stderr, "Node %s %s\n", node->name, reachable ? "reachable" : "unreachable");
+
+ if(!strcmp(node->name, "peer")) {
+ if(reachable) {
+ set_sync_flag(&peer_reachable, true);
+
+ if(blacklist_set) {
+ ++total_reachable_callbacks_01;
+ }
+ } else {
+ set_sync_flag(&peer_unreachable, true);
+
+ if(blacklist_set) {
+ ++total_unreachable_callbacks_01;
+ }
+ }
+ }
+
+ return;
+}
+
+static void poll_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, size_t len) {
+ (void)len;
+ fprintf(stderr, "%s poll cb invoked\n", (char *)channel->priv);
+ meshlink_set_channel_poll_cb(mesh, channel, NULL);
+ assert(meshlink_channel_send(mesh, channel, "test", 5) >= 0);
+ return;
+}
+
+static void channel_receive_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *dat, size_t len) {
+ if(len == 0) {
+ fprintf(stderr, "Closed channel with %s\n", (char *)channel->priv);
+
+ if(blacklist_set) {
+ ++total_channel_closure_callbacks_01;
+ }
+
+ if(total_channel_closure_callbacks_01 == 2) {
+ set_sync_flag(&channels_closed, true);
+ }
+ }
+
+ if(!strcmp(channel->node->name, "peer")) {
+ if(len == 5 && !memcmp(dat, "reply", 5)) {
+ fprintf(stderr, "Channel opened with %s\n", (char *)channel->priv);
+ set_sync_flag(&channel_opened, true);
+ }
+ }
+
+ return;
+}
+
+static void log_message(meshlink_handle_t *mesh, meshlink_log_level_t level, const char *text) {
+ (void)mesh;
+
+ fprintf(stderr, "\x1b[32m nut:\x1b[0m %s\n", text);
+}
+
+void *test_channel_blacklist_disonnection_nut_01(void *arg) {
+ mesh_arg_t *mesh_arg = (mesh_arg_t *)arg;
+ total_reachable_callbacks_01 = 0;
+ total_unreachable_callbacks_01 = 0;
+ total_channel_closure_callbacks_01 = 0;
+
+ set_sync_flag(&peer_reachable, false);
+ set_sync_flag(&peer_unreachable, false);
+ set_sync_flag(&channel_opened, false);
+ blacklist_set = false;
+
+ assert(!channel_discon_network_failure_01 || !channel_discon_network_failure_02);
+
+ // Run relay node instance
+
+ meshlink_handle_t *mesh;
+ mesh = meshlink_open(mesh_arg->node_name, mesh_arg->confbase, mesh_arg->app_name, mesh_arg->dev_class);
+ assert(mesh);
+ meshlink_set_log_cb(mesh, MESHLINK_DEBUG, log_message);
+ meshlink_set_node_status_cb(mesh, node_status_cb);
+
+ // Join relay node and if fails to join then try few more attempts
+
+ if(mesh_arg->join_invitation) {
+ assert(meshlink_join(mesh, mesh_arg->join_invitation));
+ }
+
+ assert(meshlink_start(mesh));
+
+ // Wait for peer node to join
+
+ assert(wait_sync_flag(&peer_reachable, 30));
+
+ meshlink_node_t *peer_node = meshlink_get_node(mesh, "peer");
+ assert(peer_node);
+ meshlink_channel_t *channel1 = meshlink_channel_open(mesh, peer_node, CHANNEL_PORT,
+ channel_receive_cb, NULL, 0);
+ channel1->priv = "channel1";
+ meshlink_set_channel_poll_cb(mesh, channel1, poll_cb);
+
+ assert(wait_sync_flag(&channel_opened, 15));
+
+ set_sync_flag(&channel_opened, false);
+
+ meshlink_channel_t *channel2 = meshlink_channel_open(mesh, peer_node, CHANNEL_PORT,
+ channel_receive_cb, NULL, 0);
+ channel2->priv = "channel2";
+ meshlink_set_channel_poll_cb(mesh, channel2, poll_cb);
+
+ assert(wait_sync_flag(&channel_opened, 15));
+
+ blacklist_set = true;
+
+ if(channel_discon_network_failure_01) {
+ fprintf(stderr, "Simulating network failure before blacklisting\n");
+ assert(system("iptables -A INPUT -m statistic --mode random --probability 0.9 -j DROP") == 0);
+ assert(system("iptables -A OUTPUT -m statistic --mode random --probability 0.9 -j DROP") == 0);
+ sleep(1);
+ }
+
+ fprintf(stderr, "Node blacklisted\n");
+ set_sync_flag(&channels_closed, false);
+ meshlink_blacklist(mesh, peer_node);
+
+ sleep(10);
+
+ if(channel_discon_network_failure_02) {
+ fprintf(stderr, "Simulating network failure after blacklisting\n");
+ assert(system("iptables -A INPUT -m statistic --mode random --probability 0.9 -j DROP") == 0);
+ assert(system("iptables -A OUTPUT -m statistic --mode random --probability 0.9 -j DROP") == 0);
+ sleep(1);
+ }
+
+ if(channel_discon_case_ping) {
+ fprintf(stderr, "Sending data through channels after blacklisting\n");
+ assert(meshlink_channel_send(mesh, channel1, "ping", 5) >= 0);
+ assert(meshlink_channel_send(mesh, channel2, "ping", 5) >= 0);
+ }
+
+ if(wait_sync_flag(&channels_closed, 120) == false) {
+ set_sync_flag(&test_channel_discon_nut_close, true);
+ return NULL;
+ }
+
+ if(channel_discon_network_failure_01 || channel_discon_network_failure_02) {
+ fprintf(stderr, "Simulating network failure after blacklisting\n");
+ assert(system("iptables -D INPUT -m statistic --mode random --probability 0.9 -j DROP") == 0);
+ assert(system("iptables -D OUTPUT -m statistic --mode random --probability 0.9 -j DROP") == 0);
+ }
+
+ set_sync_flag(&peer_reachable, false);
+
+ meshlink_whitelist(mesh, peer_node);
+ fprintf(stderr, "Node whitelisted\n");
+
+ wait_sync_flag(&peer_reachable, 70);
+
+ fprintf(stderr, "Closing NUT instance\n");
+ blacklist_set = false;
+
+ set_sync_flag(&test_channel_discon_nut_close, true);
+
+ meshlink_close(mesh);
+ return NULL;
+}
projects / meshlink / blobdiff