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,
  51                            bool reachable) {
  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         if(len == 0) {
  84                 fprintf(stderr, "Closed channel with %s\n", (char *)channel->priv);
  85
  86                 if(blacklist_set) {
  87                         ++total_channel_closure_callbacks_01;
  88                 }
  89
  90                 if(total_channel_closure_callbacks_01 == 2) {
  91                         set_sync_flag(&channels_closed, true);
  92                 }
  93         }
  94
  95         if(!strcmp(channel->node->name, "peer")) {
  96                 if(len == 5 && !memcmp(dat, "reply", 5)) {
  97                         fprintf(stderr, "Channel opened with %s\n", (char *)channel->priv);
  98                         set_sync_flag(&channel_opened, true);
  99                 }
 100         }
 101
 102         return;
 103 }
 104
 105 static void log_message(meshlink_handle_t *mesh, meshlink_log_level_t level, const char *text) {
 106         (void)mesh;
 107
 108         fprintf(stderr, "\x1b[32m nut:\x1b[0m %s\n", text);
 109 }
 110
 111 void *test_channel_blacklist_disonnection_nut_01(void *arg) {
 112         mesh_arg_t *mesh_arg = (mesh_arg_t *)arg;
 113         total_reachable_callbacks_01 = 0;
 114         total_unreachable_callbacks_01 = 0;
 115         total_channel_closure_callbacks_01 = 0;
 116
 117         set_sync_flag(&peer_reachable, false);
 118         set_sync_flag(&peer_unreachable, false);
 119         set_sync_flag(&channel_opened, false);
 120         blacklist_set = false;
 121
 122         assert(!channel_discon_network_failure_01 || !channel_discon_network_failure_02);
 123
 124         // Run relay node instance
 125
 126         meshlink_handle_t *mesh;
 127         mesh = meshlink_open(mesh_arg->node_name, mesh_arg->confbase, mesh_arg->app_name, mesh_arg->dev_class);
 128         assert(mesh);
 129         meshlink_set_log_cb(mesh, MESHLINK_DEBUG, log_message);
 130         meshlink_set_node_status_cb(mesh, node_status_cb);
 131
 132         // Join relay node and if fails to join then try few more attempts
 133
 134         if(mesh_arg->join_invitation) {
 135                 assert(meshlink_join(mesh, mesh_arg->join_invitation));
 136         }
 137
 138         assert(meshlink_start(mesh));
 139
 140         // Wait for peer node to join
 141
 142         assert(wait_sync_flag(&peer_reachable, 30));
 143
 144         meshlink_node_t *peer_node = meshlink_get_node(mesh, "peer");
 145         assert(peer_node);
 146         meshlink_channel_t *channel1 = meshlink_channel_open(mesh, peer_node, CHANNEL_PORT,
 147                                        channel_receive_cb, NULL, 0);
 148         channel1->priv = "channel1";
 149         meshlink_set_channel_poll_cb(mesh, channel1, poll_cb);
 150
 151         assert(wait_sync_flag(&channel_opened, 15));
 152
 153         set_sync_flag(&channel_opened, false);
 154
 155         meshlink_channel_t *channel2 = meshlink_channel_open(mesh, peer_node, CHANNEL_PORT,
 156                                        channel_receive_cb, NULL, 0);
 157         channel2->priv = "channel2";
 158         meshlink_set_channel_poll_cb(mesh, channel2, poll_cb);
 159
 160         assert(wait_sync_flag(&channel_opened, 15));
 161
 162         blacklist_set = true;
 163
 164         if(channel_discon_network_failure_01) {
 165                 fprintf(stderr, "Simulating network failure before blacklisting\n");
 166                 assert(system("iptables -A INPUT -m statistic --mode random --probability 0.9 -j DROP") == 0);
 167                 assert(system("iptables -A OUTPUT -m statistic --mode random --probability 0.9 -j DROP") == 0);
 168                 sleep(1);
 169         }
 170
 171         fprintf(stderr, "Node blacklisted\n");
 172         set_sync_flag(&channels_closed, false);
 173         meshlink_blacklist(mesh, peer_node);
 174
 175         sleep(10);
 176
 177         if(channel_discon_network_failure_02) {
 178                 fprintf(stderr, "Simulating network failure after blacklisting\n");
 179                 assert(system("iptables -A INPUT -m statistic --mode random --probability 0.9 -j DROP") == 0);
 180                 assert(system("iptables -A OUTPUT -m statistic --mode random --probability 0.9 -j DROP") == 0);
 181                 sleep(1);
 182         }
 183
 184         if(channel_discon_case_ping) {
 185                 fprintf(stderr, "Sending data through channels after blacklisting\n");
 186                 assert(meshlink_channel_send(mesh, channel1, "ping", 5) >= 0);
 187                 assert(meshlink_channel_send(mesh, channel2, "ping", 5) >= 0);
 188         }
 189
 190         if(wait_sync_flag(&channels_closed, 120) == false) {
 191                 set_sync_flag(&test_channel_discon_nut_close, true);
 192                 return NULL;
 193         }
 194
 195         if(channel_discon_network_failure_01 || channel_discon_network_failure_02) {
 196                 fprintf(stderr, "Simulating network failure after blacklisting\n");
 197                 assert(system("iptables -D INPUT -m statistic --mode random --probability 0.9 -j DROP") == 0);
 198                 assert(system("iptables -D OUTPUT -m statistic --mode random --probability 0.9 -j DROP") == 0);
 199         }
 200
 201         set_sync_flag(&peer_reachable, false);
 202
 203         meshlink_whitelist(mesh, peer_node);
 204         fprintf(stderr, "Node whitelisted\n");
 205
 206         wait_sync_flag(&peer_reachable, 70);
 207
 208         fprintf(stderr, "Closing NUT instance\n");
 209         blacklist_set = false;
 210
 211         set_sync_flag(&test_channel_discon_nut_close, true);
 212
 213         meshlink_close(mesh);
 214         return NULL;
 215 }