git.meshlink.io Git - meshlink/blob - test/blackbox/test_case_channel_blacklist_01/node_sim_nut_01.c

   1 /*
   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>
   5
   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.
  10
  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.
  15
  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.
  19 */
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23 #include <pthread.h>
  24 #include <assert.h>
  25 #include <signal.h>
  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"
  32
  33 #define CHANNEL_PORT 1234
  34
  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;
  44
  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};
  49
  50 static void node_status_cb(meshlink_handle_t *mesh, meshlink_node_t *node, bool reachable) {
  51         (void)mesh;
  52
  53         fprintf(stderr, "Node %s %s\n", node->name, reachable ? "reachable" : "unreachable");
  54
  55         if(!strcmp(node->name, "peer")) {
  56                 if(reachable) {
  57                         set_sync_flag(&peer_reachable, true);
  58
  59                         if(blacklist_set) {
  60                                 ++total_reachable_callbacks_01;
  61                         }
  62                 } else {
  63                         set_sync_flag(&peer_unreachable, true);
  64
  65                         if(blacklist_set) {
  66                                 ++total_unreachable_callbacks_01;
  67                         }
  68                 }
  69         }
  70
  71         return;
  72 }
  73
  74 static void poll_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, size_t len) {
  75         (void)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);
  79         return;
  80 }
  81
  82 static void channel_receive_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *dat, size_t len) {
  83         (void)mesh;
  84
  85         if(len == 0) {
  86                 fprintf(stderr, "Closed channel with %s\n", (char *)channel->priv);
  87
  88                 if(blacklist_set) {
  89                         ++total_channel_closure_callbacks_01;
  90                 }
  91
  92                 if(total_channel_closure_callbacks_01 == 2) {
  93                         set_sync_flag(&channels_closed, true);
  94                 }
  95         }
  96
  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);
 101                 }
 102         }
 103
 104         return;
 105 }
 106
 107 static void log_message(meshlink_handle_t *mesh, meshlink_log_level_t level, const char *text) {
 108         (void)level;
 109
 110         (void)mesh;
 111
 112         fprintf(stderr, "\x1b[32m nut:\x1b[0m %s\n", text);
 113 }
 114
 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;
 120
 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;
 125
 126         assert(!channel_discon_network_failure_01 || !channel_discon_network_failure_02);
 127
 128         // Run relay node instance
 129
 130         meshlink_handle_t *mesh;
 131         mesh = meshlink_open(mesh_arg->node_name, mesh_arg->confbase, mesh_arg->app_name, mesh_arg->dev_class);
 132         assert(mesh);
 133         meshlink_set_log_cb(mesh, MESHLINK_DEBUG, log_message);
 134         meshlink_set_node_status_cb(mesh, node_status_cb);
 135
 136         // Join relay node and if fails to join then try few more attempts
 137
 138         if(mesh_arg->join_invitation) {
 139                 assert(meshlink_join(mesh, mesh_arg->join_invitation));
 140         }
 141
 142         assert(meshlink_start(mesh));
 143
 144         // Wait for peer node to join
 145
 146         assert(wait_sync_flag(&peer_reachable, 30));
 147
 148         meshlink_node_t *peer_node = meshlink_get_node(mesh, "peer");
 149         assert(peer_node);
 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);
 154
 155         assert(wait_sync_flag(&channel_opened, 15));
 156
 157         set_sync_flag(&channel_opened, false);
 158
 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);
 163
 164         assert(wait_sync_flag(&channel_opened, 15));
 165
 166         blacklist_set = true;
 167
 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);
 172                 sleep(1);
 173         }
 174
 175         fprintf(stderr, "Node blacklisted\n");
 176         set_sync_flag(&channels_closed, false);
 177         meshlink_blacklist(mesh, peer_node);
 178
 179         sleep(10);
 180
 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);
 185                 sleep(1);
 186         }
 187
 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);
 192         }
 193
 194         if(wait_sync_flag(&channels_closed, 120) == false) {
 195                 set_sync_flag(&test_channel_discon_nut_close, true);
 196                 return NULL;
 197         }
 198
 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);
 203         }
 204
 205         set_sync_flag(&peer_reachable, false);
 206
 207         meshlink_whitelist(mesh, peer_node);
 208         fprintf(stderr, "Node whitelisted\n");
 209
 210         wait_sync_flag(&peer_reachable, 70);
 211
 212         fprintf(stderr, "Closing NUT instance\n");
 213         blacklist_set = false;
 214
 215         set_sync_flag(&test_channel_discon_nut_close, true);
 216
 217         meshlink_close(mesh);
 218         return NULL;
 219 }