git.meshlink.io Git - meshlink/blob - test/blackbox/test_case_optimal_pmtu_07/node_sim_nut.c

   1 /*
   2     node_sim_nut.c -- Implementation of Node Simulation for Meshlink Testing
   3                     for meta connection test case 01 - re-connection of
   4                     two nodes when relay node goes down
   5     Copyright (C) 2018  Guus Sliepen <guus@meshlink.io>
   6
   7     This program is free software; you can redistribute it and/or modify
   8     it under the terms of the GNU General Public License as published by
   9     the Free Software Foundation; either version 2 of the License, or
  10     (at your option) any later version.
  11
  12     This program is distributed in the hope that it will be useful,
  13     but WITHOUT ANY WARRANTY; without even the implied warranty of
  14     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15     GNU General Public License for more details.
  16
  17     You should have received a copy of the GNU General Public License along
  18     with this program; if not, write to the Free Software Foundation, Inc.,
  19     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  20 */
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <pthread.h>
  25 #include <assert.h>
  26 #include <signal.h>
  27 #include <time.h>
  28 #include "../common/common_handlers.h"
  29 #include "../common/test_step.h"
  30 #include "../common/mesh_event_handler.h"
  31 #include "../../utils.h"
  32 #include "../run_blackbox_tests/test_optimal_pmtu.h"
  33
  34 #define CMD_LINE_ARG_NODENAME   1
  35 #define CMD_LINE_ARG_DEVCLASS   2
  36 #define CMD_LINE_ARG_CLIENTID   3
  37 #define CMD_LINE_ARG_IMPORTSTR  4
  38 #define CMD_LINE_ARG_INVITEURL  5
  39 #define CHANNEL_PORT 1234
  40
  41 #pragma pack(1)
  42
  43 static int client_id = -1;
  44
  45 static struct sync_flag peer_reachable = {.mutex  = PTHREAD_MUTEX_INITIALIZER, .cond = PTHREAD_COND_INITIALIZER};
  46 static struct sync_flag channel_opened = {.mutex  = PTHREAD_MUTEX_INITIALIZER, .cond = PTHREAD_COND_INITIALIZER};
  47
  48 static void node_status_cb(meshlink_handle_t *mesh, meshlink_node_t *node,
  49                            bool reachable);
  50 static void channel_receive_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *dat, size_t len);
  51 static bool channel_accept(meshlink_handle_t *mesh, meshlink_channel_t *channel, uint16_t port, const void *dat, size_t len);
  52
  53 static pmtu_attr_t node_pmtu[2];
  54
  55 static void print_mtu_calc(pmtu_attr_t node_pmtu) {
  56         fprintf(stderr, "MTU size : %d\n", node_pmtu.mtu_size);
  57         fprintf(stderr, "Probes took for calculating PMTU discovery : %d\n", node_pmtu.mtu_discovery.probes);
  58         fprintf(stderr, "Probes total length took for calculating PMTU discovery : %d\n", node_pmtu.mtu_discovery.probes_total_len);
  59         fprintf(stderr, "Time took for calculating PMTU discovery : %lu\n", node_pmtu.mtu_discovery.time);
  60         fprintf(stderr, "Total MTU ping probes : %d\n", node_pmtu.mtu_ping.probes);
  61         fprintf(stderr, "Total MTU ping probes length : %d\n", node_pmtu.mtu_ping.probes_total_len);
  62         float avg = 0;
  63
  64         if(node_pmtu.mtu_ping.probes) {
  65                 avg = (float)node_pmtu.mtu_ping.time / (float)node_pmtu.mtu_ping.probes;
  66         }
  67
  68         fprintf(stderr, "Average MTU ping probes ping time : %f\n", avg);
  69         fprintf(stderr, "Total probes received %d\n", node_pmtu.mtu_recv_probes.probes);
  70         fprintf(stderr, "Total probes sent %d\n", node_pmtu.mtu_sent_probes.probes);
  71 }
  72
  73 static void node_status_cb(meshlink_handle_t *mesh, meshlink_node_t *node,
  74                            bool reachable) {
  75         if(!strcasecmp(node->name, "peer") && reachable) {
  76                 set_sync_flag(&peer_reachable, true);
  77         }
  78
  79         mesh_event_sock_send(client_id, reachable ? NODE_JOINED : NODE_LEFT, node->name, 100);
  80         return;
  81 }
  82
  83 static void poll_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, size_t len) {
  84         (void)len;
  85         meshlink_set_channel_poll_cb(mesh, channel, NULL);
  86         assert(meshlink_channel_send(mesh, channel, "test", 5) >= 0);
  87         return;
  88 }
  89
  90 static bool channel_accept(meshlink_handle_t *mesh, meshlink_channel_t *channel, uint16_t port, const void *dat, size_t len) {
  91         (void)dat;
  92         (void)len;
  93
  94         assert(port == CHANNEL_PORT);
  95
  96         if(!strcmp(channel->node->name, "peer")) {
  97                 meshlink_set_channel_receive_cb(mesh, channel, channel_receive_cb);
  98                 mesh->priv = channel;
  99
 100                 return true;
 101         }
 102
 103         return false;
 104 }
 105
 106 /* channel receive callback */
 107 static void channel_receive_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *dat, size_t len) {
 108         if(len == 0) {
 109                 mesh_event_sock_send(client_id, ERR_NETWORK, channel->node->name, 100);
 110                 return;
 111         }
 112
 113         if(!strcmp(channel->node->name, "peer")) {
 114                 if(!memcmp(dat, "reply", 5)) {
 115                         set_sync_flag(&channel_opened, true);
 116                         fprintf(stderr, "GOT REPLY FROM PEER\n");
 117                 } else if(!memcmp(dat, "test", 5)) {
 118                         assert(meshlink_channel_send(mesh, channel, "reply", 5) >= 0);
 119                 }
 120         }
 121
 122         return;
 123 }
 124
 125 void meshlink_logger(meshlink_handle_t *mesh, meshlink_log_level_t level,
 126                      const char *text) {
 127         (void)mesh;
 128         (void)level;
 129         int probe_len;
 130         int mtu_len;
 131         int probes;
 132         char node_name[100];
 133         int i = -1;
 134
 135         time_t cur_time;
 136         time_t probe_interval;
 137
 138         cur_time = time(NULL);
 139         assert(cur_time != -1);
 140
 141         static time_t node_shutdown_time = 0;
 142         bool mtu_probe = false;
 143
 144         if(node_shutdown_time && cur_time >= node_shutdown_time) {
 145                 test_running = false;
 146         }
 147
 148         static const char *levelstr[] = {
 149                 [MESHLINK_DEBUG] = "\x1b[34mDEBUG",
 150                 [MESHLINK_INFO] = "\x1b[32mINFO",
 151                 [MESHLINK_WARNING] = "\x1b[33mWARNING",
 152                 [MESHLINK_ERROR] = "\x1b[31mERROR",
 153                 [MESHLINK_CRITICAL] = "\x1b[31mCRITICAL",
 154         };
 155
 156         fprintf(stderr, "%s:\x1b[0m %s\n", levelstr[level], text);
 157
 158         if(sscanf(text, "Sending MTU probe length %d to %s", &probe_len, node_name) == 2) {
 159                 find_node_index(i, node_name);
 160                 node_pmtu[i].mtu_sent_probes.probes += 1;
 161                 node_pmtu[i].mtu_sent_probes.probes_total_len += probe_len;
 162
 163                 if(node_pmtu[i].mtu_size) {
 164                         if(node_pmtu[i].mtu_sent_probes.time > node_pmtu[i].mtu_recv_probes.time) {
 165                                 probe_interval = cur_time - node_pmtu[i].mtu_sent_probes.time;
 166                         } else {
 167                                 probe_interval = cur_time - node_pmtu[i].mtu_recv_probes.time;
 168                         }
 169
 170                         node_pmtu[i].mtu_ping.probes += 1;
 171                         node_pmtu[i].mtu_ping.time += probe_interval;
 172                         node_pmtu[i].mtu_ping.probes_total_len += probe_len;
 173                 }
 174
 175                 node_pmtu[i].mtu_sent_probes.time = cur_time;
 176
 177         } else if(sscanf(text, "Got MTU probe length %d from %s", &probe_len, node_name) == 2) {
 178                 find_node_index(i, node_name);
 179                 node_pmtu[i].mtu_recv_probes.probes += 1;
 180                 node_pmtu[i].mtu_recv_probes.probes_total_len += probe_len;
 181
 182                 if(node_pmtu[i].mtu_size) {
 183                         if(node_pmtu[i].mtu_sent_probes.time > node_pmtu[i].mtu_recv_probes.time) {
 184                                 probe_interval = cur_time - node_pmtu[i].mtu_sent_probes.time;
 185                         } else {
 186                                 probe_interval = cur_time - node_pmtu[i].mtu_recv_probes.time;
 187                         }
 188
 189                         node_pmtu[i].mtu_ping.probes += 1;
 190                         node_pmtu[i].mtu_ping.time += probe_interval;
 191                         node_pmtu[i].mtu_ping.probes_total_len += probe_len;
 192                 }
 193
 194                 node_pmtu[i].mtu_recv_probes.time = cur_time;
 195
 196         } else if(sscanf(text, "Fixing MTU of %s to %d after %d probes", node_name, &mtu_len, &probes) == 3) {
 197                 static bool mtu_set = true;
 198
 199                 if(!node_shutdown_time && !strcasecmp("relay", node_name) && mtu_set) {
 200                         node_shutdown_time = cur_time + PING_TRACK_TIMEOUT;
 201                         mtu_set = false;
 202                 }
 203
 204                 find_node_index(i, node_name);
 205                 node_pmtu[i].mtu_discovery.probes = node_pmtu[i].mtu_recv_probes.probes + node_pmtu[i].mtu_sent_probes.probes;
 206                 node_pmtu[i].mtu_discovery.probes_total_len = node_pmtu[i].mtu_sent_probes.probes_total_len + node_pmtu[i].mtu_recv_probes.probes_total_len;
 207                 node_pmtu[i].mtu_discovery.time = cur_time - node_pmtu[i].mtu_start.time;
 208                 node_pmtu[i].mtu_discovery.count += 1;
 209                 node_pmtu[i].mtu_size = mtu_len;
 210
 211         } else if(sscanf(text, "SPTPS key exchange with %s succesful", node_name) == 1) {
 212                 find_node_index(i, node_name);
 213                 node_pmtu[i].mtu_start.time = cur_time;
 214                 node_pmtu[i].mtu_start.count += 1;
 215                 memset(&node_pmtu[i].mtu_discovery, 0, sizeof(struct pmtu_attr_para));
 216                 memset(&node_pmtu[i].mtu_ping, 0, sizeof(struct pmtu_attr_para));
 217                 memset(&node_pmtu[i].mtu_increase, 0, sizeof(struct pmtu_attr_para));
 218
 219         } else if(sscanf(text, "Increase in PMTU to %s detected, restarting PMTU discovery", node_name) == 1) {
 220                 find_node_index(i, node_name);
 221                 node_pmtu[i].mtu_increase.time = cur_time - node_pmtu[i].mtu_start.time;
 222                 node_pmtu[i].mtu_increase.count += 1;
 223
 224         } else if(sscanf(text, "Trying to send MTU probe to unreachable or rekeying node %s", node_name) == 1) {
 225
 226         } else if(sscanf(text, "%s did not respond to UDP ping, restarting PMTU discovery", node_name) == 1) {
 227
 228         } else if(sscanf(text, "No response to MTU probes from %s", node_name) == 1) {
 229
 230         } else if((sscanf(text, "Connection with %s activated", node_name) == 1) || (sscanf(text, "Already connected to %s", node_name) == 1)) {
 231                 mesh_event_sock_send(client_id, META_CONN_SUCCESSFUL, node_name, sizeof(node_name));
 232
 233         } else if((sscanf(text, "Connection closed by %s", node_name) == 1) || (sscanf(text, "Closing connection with %s", node_name) == 1)) {
 234                 mesh_event_sock_send(client_id, META_CONN_CLOSED, node_name, sizeof(node_name));
 235
 236         }
 237 }
 238
 239 int main(int argc, char *argv[]) {
 240         struct timeval main_loop_wait = { 5, 0 };
 241         int i;
 242
 243         // Import mesh event handler
 244
 245         if((argv[CMD_LINE_ARG_CLIENTID]) && (argv[CMD_LINE_ARG_IMPORTSTR])) {
 246                 client_id = atoi(argv[CMD_LINE_ARG_CLIENTID]);
 247                 mesh_event_sock_connect(argv[CMD_LINE_ARG_IMPORTSTR]);
 248         }
 249
 250         setup_signals();
 251
 252         // Execute test steps
 253
 254         meshlink_handle_t *mesh = meshlink_open("testconf", argv[CMD_LINE_ARG_NODENAME],
 255                                                 "test_channel_conn", atoi(argv[CMD_LINE_ARG_DEVCLASS]));
 256         assert(mesh);
 257         meshlink_set_log_cb(mesh, MESHLINK_DEBUG, meshlink_logger);
 258         meshlink_set_node_status_cb(mesh, node_status_cb);
 259         meshlink_enable_discovery(mesh, false);
 260         sleep(1);
 261
 262         if(argv[CMD_LINE_ARG_INVITEURL]) {
 263                 int attempts;
 264                 bool join_ret;
 265
 266                 for(attempts = 0; attempts < 10; attempts++) {
 267                         join_ret = meshlink_join(mesh, argv[CMD_LINE_ARG_INVITEURL]);
 268
 269                         if(join_ret) {
 270                                 break;
 271                         }
 272
 273                         sleep(1);
 274                 }
 275
 276                 if(attempts == 10) {
 277                         abort();
 278                 }
 279         }
 280
 281         assert(meshlink_start(mesh));
 282
 283         // Wait for peer node to join
 284
 285         assert(wait_sync_flag(&peer_reachable, 10));
 286
 287         // Open a channel to peer node
 288
 289         meshlink_node_t *peer_node = meshlink_get_node(mesh, "peer");
 290         assert(peer_node);
 291         meshlink_channel_t *channel = meshlink_channel_open(mesh, peer_node, CHANNEL_PORT,
 292                                       channel_receive_cb, NULL, 0);
 293         meshlink_set_channel_poll_cb(mesh, channel, poll_cb);
 294
 295         assert(wait_sync_flag(&channel_opened, 30));
 296         assert(mesh_event_sock_send(client_id, CHANNEL_OPENED, NULL, 0));
 297
 298         // All test steps executed - wait for signals to stop/start or close the mesh
 299
 300         time_t time_stamp, send_time;
 301
 302         time_stamp = time(NULL);
 303         send_time = time_stamp + 10;
 304
 305         while(test_running) {
 306                 select(1, NULL, NULL, NULL, &main_loop_wait);
 307
 308                 time_stamp = time(NULL);
 309
 310                 if(time_stamp >= send_time) {
 311                         send_time = time_stamp + 10;
 312                         meshlink_channel_send(mesh, channel, "ping", 5);
 313                 }
 314         }
 315
 316         pmtu_attr_t send_mtu_data;
 317         send_mtu_data = node_pmtu[NODE_PMTU_PEER];
 318         print_mtu_calc(send_mtu_data);
 319         assert(mesh_event_sock_send(client_id, OPTIMAL_PMTU_PEER, &send_mtu_data, sizeof(send_mtu_data)));
 320         send_mtu_data = node_pmtu[NODE_PMTU_RELAY];
 321         print_mtu_calc(send_mtu_data);
 322         assert(mesh_event_sock_send(client_id, OPTIMAL_PMTU_RELAY, &send_mtu_data, sizeof(send_mtu_data)));
 323
 324         meshlink_close(mesh);
 325 }