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
  21 #ifdef NDEBUG
  22 #undef NDEBUG
  23 #endif
  24
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <pthread.h>
  29 #include <assert.h>
  30 #include <signal.h>
  31 #include "../common/common_handlers.h"
  32 #include "../common/test_step.h"
  33 #include "../common/mesh_event_handler.h"
  34 #include "../common/network_namespace_framework.h"
  35 #include "../../utils.h"
  36 #include "node_sim_nut_01.h"
  37
  38 #define CHANNEL_PORT 1234
  39
  40 static bool blacklist_set;
  41 int total_reachable_callbacks_01;
  42 int total_unreachable_callbacks_01;
  43 int total_channel_closure_callbacks_01;
  44 bool channel_discon_case_ping;
  45 bool channel_discon_network_failure_01;
  46 bool channel_discon_network_failure_02;
  47 bool test_blacklist_whitelist_01;
  48 bool test_channel_restart_01;
  49
  50 static struct sync_flag peer_reachable = {.mutex  = PTHREAD_MUTEX_INITIALIZER, .cond = PTHREAD_COND_INITIALIZER};
  51 static struct sync_flag peer_unreachable = {.mutex  = PTHREAD_MUTEX_INITIALIZER, .cond = PTHREAD_COND_INITIALIZER};
  52 static struct sync_flag channel_opened = {.mutex  = PTHREAD_MUTEX_INITIALIZER, .cond = PTHREAD_COND_INITIALIZER};
  53 static struct sync_flag channels_closed = {.mutex  = PTHREAD_MUTEX_INITIALIZER, .cond = PTHREAD_COND_INITIALIZER};
  54
  55 static void node_status_cb(meshlink_handle_t *mesh, meshlink_node_t *node, bool reachable) {
  56         (void)mesh;
  57
  58         fprintf(stderr, "Node %s %s\n", node->name, reachable ? "reachable" : "unreachable");
  59
  60         if(!strcmp(node->name, "peer")) {
  61                 if(reachable) {
  62                         set_sync_flag(&peer_reachable, true);
  63
  64                         if(blacklist_set) {
  65                                 ++total_reachable_callbacks_01;
  66                         }
  67                 } else {
  68                         set_sync_flag(&peer_unreachable, true);
  69
  70                         if(blacklist_set) {
  71                                 ++total_unreachable_callbacks_01;
  72                         }
  73                 }
  74         }
  75
  76         return;
  77 }
  78
  79 static void poll_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, size_t len) {
  80         (void)len;
  81         fprintf(stderr, "%s poll cb invoked\n", (char *)channel->priv);
  82         meshlink_set_channel_poll_cb(mesh, channel, NULL);
  83         assert(meshlink_channel_send(mesh, channel, "test", 5) >= 0);
  84         return;
  85 }
  86
  87 static void channel_receive_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *dat, size_t len) {
  88         (void)mesh;
  89
  90         if(len == 0) {
  91                 fprintf(stderr, "Closed channel with %s\n", (char *)channel->priv);
  92
  93                 if(blacklist_set) {
  94                         ++total_channel_closure_callbacks_01;
  95                 }
  96
  97                 if(total_channel_closure_callbacks_01 == 2) {
  98                         set_sync_flag(&channels_closed, true);
  99                 }
 100         }
 101
 102         if(!strcmp(channel->node->name, "peer")) {
 103                 if(len == 5 && !memcmp(dat, "reply", 5)) {
 104                         fprintf(stderr, "Channel opened with %s\n", (char *)channel->priv);
 105                         set_sync_flag(&channel_opened, true);
 106                 }
 107         }
 108
 109         return;
 110 }
 111
 112 static void log_message(meshlink_handle_t *mesh, meshlink_log_level_t level, const char *text) {
 113         (void)level;
 114
 115         (void)mesh;
 116
 117         fprintf(stderr, "\x1b[32m nut:\x1b[0m %s\n", text);
 118 }
 119
 120 void *test_channel_blacklist_disonnection_nut_01(void *arg) {
 121         mesh_arg_t *mesh_arg = (mesh_arg_t *)arg;
 122         total_reachable_callbacks_01 = 0;
 123         total_unreachable_callbacks_01 = 0;
 124         total_channel_closure_callbacks_01 = 0;
 125
 126         set_sync_flag(&peer_reachable, false);
 127         set_sync_flag(&peer_unreachable, false);
 128         set_sync_flag(&channel_opened, false);
 129         blacklist_set = false;
 130
 131         assert(!channel_discon_network_failure_01 || !channel_discon_network_failure_02);
 132
 133         // Run relay node instance
 134
 135         meshlink_handle_t *mesh;
 136         mesh = meshlink_open(mesh_arg->node_name, mesh_arg->confbase, mesh_arg->app_name, mesh_arg->dev_class);
 137         assert(mesh);
 138         meshlink_set_log_cb(mesh, MESHLINK_DEBUG, log_message);
 139         meshlink_set_node_status_cb(mesh, node_status_cb);
 140
 141         // Join relay node and if fails to join then try few more attempts
 142
 143         if(mesh_arg->join_invitation) {
 144                 assert(meshlink_join(mesh, mesh_arg->join_invitation));
 145         }
 146
 147         assert(meshlink_start(mesh));
 148
 149         // Wait for peer node to join
 150
 151         assert(wait_sync_flag(&peer_reachable, 30));
 152
 153         meshlink_node_t *peer_node = meshlink_get_node(mesh, "peer");
 154         assert(peer_node);
 155         meshlink_channel_t *channel1 = meshlink_channel_open(mesh, peer_node, CHANNEL_PORT,
 156                                        channel_receive_cb, NULL, 0);
 157         channel1->priv = "channel1";
 158         meshlink_set_channel_poll_cb(mesh, channel1, poll_cb);
 159
 160         assert(wait_sync_flag(&channel_opened, 15));
 161
 162         set_sync_flag(&channel_opened, false);
 163
 164         meshlink_channel_t *channel2 = meshlink_channel_open(mesh, peer_node, CHANNEL_PORT,
 165                                        channel_receive_cb, NULL, 0);
 166         channel2->priv = "channel2";
 167         meshlink_set_channel_poll_cb(mesh, channel2, poll_cb);
 168
 169         assert(wait_sync_flag(&channel_opened, 15));
 170
 171         blacklist_set = true;
 172
 173         if(channel_discon_network_failure_01) {
 174                 fprintf(stderr, "Simulating network failure before blacklisting\n");
 175                 assert(system("iptables -A INPUT -m statistic --mode random --probability 0.9 -j DROP") == 0);
 176                 assert(system("iptables -A OUTPUT -m statistic --mode random --probability 0.9 -j DROP") == 0);
 177                 sleep(1);
 178         }
 179
 180         fprintf(stderr, "Node blacklisted\n");
 181         set_sync_flag(&channels_closed, false);
 182         assert(meshlink_blacklist(mesh, peer_node));
 183
 184         sleep(10);
 185
 186         if(channel_discon_network_failure_02) {
 187                 fprintf(stderr, "Simulating network failure after blacklisting\n");
 188                 assert(system("iptables -A INPUT -m statistic --mode random --probability 0.9 -j DROP") == 0);
 189                 assert(system("iptables -A OUTPUT -m statistic --mode random --probability 0.9 -j DROP") == 0);
 190                 sleep(1);
 191         }
 192
 193         if(channel_discon_case_ping) {
 194                 fprintf(stderr, "Sending data through channels after blacklisting\n");
 195                 assert(meshlink_channel_send(mesh, channel1, "ping", 5) >= 0);
 196                 assert(meshlink_channel_send(mesh, channel2, "ping", 5) >= 0);
 197         }
 198
 199         if(wait_sync_flag(&channels_closed, 120) == false) {
 200                 set_sync_flag(&test_channel_discon_nut_close, true);
 201                 return NULL;
 202         }
 203
 204         if(channel_discon_network_failure_01 || channel_discon_network_failure_02) {
 205                 fprintf(stderr, "Simulating network failure after blacklisting\n");
 206                 assert(system("iptables -D INPUT -m statistic --mode random --probability 0.9 -j DROP") == 0);
 207                 assert(system("iptables -D OUTPUT -m statistic --mode random --probability 0.9 -j DROP") == 0);
 208         }
 209
 210         set_sync_flag(&peer_reachable, false);
 211
 212         assert(meshlink_whitelist(mesh, peer_node));
 213         fprintf(stderr, "Node whitelisted\n");
 214
 215         wait_sync_flag(&peer_reachable, 70);
 216
 217         fprintf(stderr, "Closing NUT instance\n");
 218         blacklist_set = false;
 219
 220         set_sync_flag(&test_channel_discon_nut_close, true);
 221
 222         meshlink_close(mesh);
 223         return NULL;
 224 }