2 node_sim_nut.c -- Implementation of Node Simulation for Meshlink Testing
3 for channel connections with respective to blacklisting their nodes
4 Copyright (C) 2019 Guus Sliepen <guus@meshlink.io>
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License along
17 with this program; if not, write to the Free Software Foundation, Inc.,
18 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
26 #include "../common/common_handlers.h"
27 #include "../common/test_step.h"
28 #include "../common/mesh_event_handler.h"
29 #include "../common/network_namespace_framework.h"
30 #include "../../utils.h"
31 #include "node_sim_nut_01.h"
33 #define CHANNEL_PORT 1234
35 static bool blacklist_set;
36 int total_reachable_callbacks_01;
37 int total_unreachable_callbacks_01;
38 int total_channel_closure_callbacks_01;
39 bool channel_discon_case_ping;
40 bool channel_discon_network_failure_01;
41 bool channel_discon_network_failure_02;
42 bool test_blacklist_whitelist_01;
43 bool test_channel_restart_01;
45 static struct sync_flag peer_reachable = {.mutex = PTHREAD_MUTEX_INITIALIZER, .cond = PTHREAD_COND_INITIALIZER};
46 static struct sync_flag peer_unreachable = {.mutex = PTHREAD_MUTEX_INITIALIZER, .cond = PTHREAD_COND_INITIALIZER};
47 static struct sync_flag channel_opened = {.mutex = PTHREAD_MUTEX_INITIALIZER, .cond = PTHREAD_COND_INITIALIZER};
48 static struct sync_flag channels_closed = {.mutex = PTHREAD_MUTEX_INITIALIZER, .cond = PTHREAD_COND_INITIALIZER};
50 static void node_status_cb(meshlink_handle_t *mesh, meshlink_node_t *node, bool reachable) {
53 fprintf(stderr, "Node %s %s\n", node->name, reachable ? "reachable" : "unreachable");
55 if(!strcmp(node->name, "peer")) {
57 set_sync_flag(&peer_reachable, true);
60 ++total_reachable_callbacks_01;
63 set_sync_flag(&peer_unreachable, true);
66 ++total_unreachable_callbacks_01;
74 static void poll_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, size_t len) {
76 fprintf(stderr, "%s poll cb invoked\n", (char *)channel->priv);
77 meshlink_set_channel_poll_cb(mesh, channel, NULL);
78 assert(meshlink_channel_send(mesh, channel, "test", 5) >= 0);
82 static void channel_receive_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *dat, size_t len) {
86 fprintf(stderr, "Closed channel with %s\n", (char *)channel->priv);
89 ++total_channel_closure_callbacks_01;
92 if(total_channel_closure_callbacks_01 == 2) {
93 set_sync_flag(&channels_closed, true);
97 if(!strcmp(channel->node->name, "peer")) {
98 if(len == 5 && !memcmp(dat, "reply", 5)) {
99 fprintf(stderr, "Channel opened with %s\n", (char *)channel->priv);
100 set_sync_flag(&channel_opened, true);
107 static void log_message(meshlink_handle_t *mesh, meshlink_log_level_t level, const char *text) {
112 fprintf(stderr, "\x1b[32m nut:\x1b[0m %s\n", text);
115 void *test_channel_blacklist_disonnection_nut_01(void *arg) {
116 mesh_arg_t *mesh_arg = (mesh_arg_t *)arg;
117 total_reachable_callbacks_01 = 0;
118 total_unreachable_callbacks_01 = 0;
119 total_channel_closure_callbacks_01 = 0;
121 set_sync_flag(&peer_reachable, false);
122 set_sync_flag(&peer_unreachable, false);
123 set_sync_flag(&channel_opened, false);
124 blacklist_set = false;
126 assert(!channel_discon_network_failure_01 || !channel_discon_network_failure_02);
128 // Run relay node instance
130 meshlink_handle_t *mesh;
131 mesh = meshlink_open(mesh_arg->node_name, mesh_arg->confbase, mesh_arg->app_name, mesh_arg->dev_class);
133 meshlink_set_log_cb(mesh, MESHLINK_DEBUG, log_message);
134 meshlink_set_node_status_cb(mesh, node_status_cb);
136 // Join relay node and if fails to join then try few more attempts
138 if(mesh_arg->join_invitation) {
139 assert(meshlink_join(mesh, mesh_arg->join_invitation));
142 assert(meshlink_start(mesh));
144 // Wait for peer node to join
146 assert(wait_sync_flag(&peer_reachable, 30));
148 meshlink_node_t *peer_node = meshlink_get_node(mesh, "peer");
150 meshlink_channel_t *channel1 = meshlink_channel_open(mesh, peer_node, CHANNEL_PORT,
151 channel_receive_cb, NULL, 0);
152 channel1->priv = "channel1";
153 meshlink_set_channel_poll_cb(mesh, channel1, poll_cb);
155 assert(wait_sync_flag(&channel_opened, 15));
157 set_sync_flag(&channel_opened, false);
159 meshlink_channel_t *channel2 = meshlink_channel_open(mesh, peer_node, CHANNEL_PORT,
160 channel_receive_cb, NULL, 0);
161 channel2->priv = "channel2";
162 meshlink_set_channel_poll_cb(mesh, channel2, poll_cb);
164 assert(wait_sync_flag(&channel_opened, 15));
166 blacklist_set = true;
168 if(channel_discon_network_failure_01) {
169 fprintf(stderr, "Simulating network failure before blacklisting\n");
170 assert(system("iptables -A INPUT -m statistic --mode random --probability 0.9 -j DROP") == 0);
171 assert(system("iptables -A OUTPUT -m statistic --mode random --probability 0.9 -j DROP") == 0);
175 fprintf(stderr, "Node blacklisted\n");
176 set_sync_flag(&channels_closed, false);
177 meshlink_blacklist(mesh, peer_node);
181 if(channel_discon_network_failure_02) {
182 fprintf(stderr, "Simulating network failure after blacklisting\n");
183 assert(system("iptables -A INPUT -m statistic --mode random --probability 0.9 -j DROP") == 0);
184 assert(system("iptables -A OUTPUT -m statistic --mode random --probability 0.9 -j DROP") == 0);
188 if(channel_discon_case_ping) {
189 fprintf(stderr, "Sending data through channels after blacklisting\n");
190 assert(meshlink_channel_send(mesh, channel1, "ping", 5) >= 0);
191 assert(meshlink_channel_send(mesh, channel2, "ping", 5) >= 0);
194 if(wait_sync_flag(&channels_closed, 120) == false) {
195 set_sync_flag(&test_channel_discon_nut_close, true);
199 if(channel_discon_network_failure_01 || channel_discon_network_failure_02) {
200 fprintf(stderr, "Simulating network failure after blacklisting\n");
201 assert(system("iptables -D INPUT -m statistic --mode random --probability 0.9 -j DROP") == 0);
202 assert(system("iptables -D OUTPUT -m statistic --mode random --probability 0.9 -j DROP") == 0);
205 set_sync_flag(&peer_reachable, false);
207 meshlink_whitelist(mesh, peer_node);
208 fprintf(stderr, "Node whitelisted\n");
210 wait_sync_flag(&peer_reachable, 70);
212 fprintf(stderr, "Closing NUT instance\n");
213 blacklist_set = false;
215 set_sync_flag(&test_channel_discon_nut_close, true);
217 meshlink_close(mesh);