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
  22 #ifdef NDEBUG
  23 #undef NDEBUG
  24 #endif
  25
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <pthread.h>
  30 #include <assert.h>
  31 #include <signal.h>
  32 #include <time.h>
  33 #include "../common/common_handlers.h"
  34 #include "../common/test_step.h"
  35 #include "../common/mesh_event_handler.h"
  36 #include "../../utils.h"
  37 #include "../run_blackbox_tests/test_optimal_pmtu.h"
  38
  39 #define CMD_LINE_ARG_NODENAME   1
  40 #define CMD_LINE_ARG_DEVCLASS   2
  41 #define CMD_LINE_ARG_CLIENTID   3
  42 #define CMD_LINE_ARG_IMPORTSTR  4
  43 #define CMD_LINE_ARG_INVITEURL  5
  44 #define CHANNEL_PORT 1234
  45
  46 #pragma pack(1)
  47
  48 static int client_id = -1;
  49
  50 static struct sync_flag peer_reachable = {.mutex  = PTHREAD_MUTEX_INITIALIZER, .cond = PTHREAD_COND_INITIALIZER};
  51 static struct sync_flag channel_opened = {.mutex  = PTHREAD_MUTEX_INITIALIZER, .cond = PTHREAD_COND_INITIALIZER};
  52
  53 static void node_status_cb(meshlink_handle_t *mesh, meshlink_node_t *node,
  54                            bool reachable);
  55 static void channel_receive_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *dat, size_t len);
  56 static bool channel_accept(meshlink_handle_t *mesh, meshlink_channel_t *channel, uint16_t port, const void *dat, size_t len);
  57
  58 static pmtu_attr_t node_pmtu[2];
  59
  60 static void print_mtu_calc(pmtu_attr_t node_pmtu) {
  61         fprintf(stderr, "MTU size : %d\n", node_pmtu.mtu_size);
  62         fprintf(stderr, "Probes took for calculating PMTU discovery : %d\n", node_pmtu.mtu_discovery.probes);
  63         fprintf(stderr, "Probes total length took for calculating PMTU discovery : %d\n", node_pmtu.mtu_discovery.probes_total_len);
  64         fprintf(stderr, "Time took for calculating PMTU discovery : %lu\n", node_pmtu.mtu_discovery.time);
  65         fprintf(stderr, "Total MTU ping probes : %d\n", node_pmtu.mtu_ping.probes);
  66         fprintf(stderr, "Total MTU ping probes length : %d\n", node_pmtu.mtu_ping.probes_total_len);
  67         float avg = 0;
  68
  69         if(node_pmtu.mtu_ping.probes) {
  70                 avg = (float)node_pmtu.mtu_ping.time / (float)node_pmtu.mtu_ping.probes;
  71         }
  72
  73         fprintf(stderr, "Average MTU ping probes ping time : %f\n", avg);
  74         fprintf(stderr, "Total probes received %d\n", node_pmtu.mtu_recv_probes.probes);
  75         fprintf(stderr, "Total probes sent %d\n", node_pmtu.mtu_sent_probes.probes);
  76 }
  77
  78 static void node_status_cb(meshlink_handle_t *mesh, meshlink_node_t *node,
  79                            bool reachable) {
  80         if(!strcasecmp(node->name, "peer") && reachable) {
  81                 set_sync_flag(&peer_reachable, true);
  82         }
  83
  84         mesh_event_sock_send(client_id, reachable ? NODE_JOINED : NODE_LEFT, node->name, 100);
  85         return;
  86 }
  87
  88 static void poll_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, size_t len) {
  89         (void)len;
  90         meshlink_set_channel_poll_cb(mesh, channel, NULL);
  91         assert(meshlink_channel_send(mesh, channel, "test", 5) >= 0);
  92         return;
  93 }
  94
  95 static bool channel_accept(meshlink_handle_t *mesh, meshlink_channel_t *channel, uint16_t port, const void *dat, size_t len) {
  96         (void)dat;
  97         (void)len;
  98
  99         assert(port == CHANNEL_PORT);
 100
 101         if(!strcmp(channel->node->name, "peer")) {
 102                 meshlink_set_channel_receive_cb(mesh, channel, channel_receive_cb);
 103                 mesh->priv = channel;
 104
 105                 return true;
 106         }
 107
 108         return false;
 109 }
 110
 111 /* channel receive callback */
 112 static void channel_receive_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *dat, size_t len) {
 113         if(len == 0) {
 114                 mesh_event_sock_send(client_id, ERR_NETWORK, channel->node->name, 100);
 115                 return;
 116         }
 117
 118         if(!strcmp(channel->node->name, "peer")) {
 119                 if(!memcmp(dat, "reply", 5)) {
 120                         set_sync_flag(&channel_opened, true);
 121                         fprintf(stderr, "GOT REPLY FROM PEER\n");
 122                 } else if(!memcmp(dat, "test", 5)) {
 123                         assert(meshlink_channel_send(mesh, channel, "reply", 5) >= 0);
 124                 }
 125         }
 126
 127         return;
 128 }
 129
 130 void meshlink_logger(meshlink_handle_t *mesh, meshlink_log_level_t level,
 131                      const char *text) {
 132         (void)mesh;
 133         (void)level;
 134         int probe_len;
 135         int mtu_len;
 136         int probes;
 137         char node_name[100];
 138         int i = -1;
 139
 140         time_t cur_time;
 141         time_t probe_interval;
 142
 143         cur_time = time(NULL);
 144         assert(cur_time != -1);
 145
 146         static time_t node_shutdown_time = 0;
 147         bool mtu_probe = false;
 148
 149         if(node_shutdown_time && cur_time >= node_shutdown_time) {
 150                 test_running = false;
 151         }
 152
 153         static const char *levelstr[] = {
 154                 [MESHLINK_DEBUG] = "\x1b[34mDEBUG",
 155                 [MESHLINK_INFO] = "\x1b[32mINFO",
 156                 [MESHLINK_WARNING] = "\x1b[33mWARNING",
 157                 [MESHLINK_ERROR] = "\x1b[31mERROR",
 158                 [MESHLINK_CRITICAL] = "\x1b[31mCRITICAL",
 159         };
 160
 161         fprintf(stderr, "%s:\x1b[0m %s\n", levelstr[level], text);
 162
 163         if(sscanf(text, "Sending MTU probe length %d to %s", &probe_len, node_name) == 2) {
 164                 find_node_index(i, node_name);
 165                 node_pmtu[i].mtu_sent_probes.probes += 1;
 166                 node_pmtu[i].mtu_sent_probes.probes_total_len += probe_len;
 167
 168                 if(node_pmtu[i].mtu_size) {
 169                         if(node_pmtu[i].mtu_sent_probes.time > node_pmtu[i].mtu_recv_probes.time) {
 170                                 probe_interval = cur_time - node_pmtu[i].mtu_sent_probes.time;
 171                         } else {
 172                                 probe_interval = cur_time - node_pmtu[i].mtu_recv_probes.time;
 173                         }
 174
 175                         node_pmtu[i].mtu_ping.probes += 1;
 176                         node_pmtu[i].mtu_ping.time += probe_interval;
 177                         node_pmtu[i].mtu_ping.probes_total_len += probe_len;
 178                 }
 179
 180                 node_pmtu[i].mtu_sent_probes.time = cur_time;
 181
 182         } else if(sscanf(text, "Got MTU probe length %d from %s", &probe_len, node_name) == 2) {
 183                 find_node_index(i, node_name);
 184                 node_pmtu[i].mtu_recv_probes.probes += 1;
 185                 node_pmtu[i].mtu_recv_probes.probes_total_len += probe_len;
 186
 187                 if(node_pmtu[i].mtu_size) {
 188                         if(node_pmtu[i].mtu_sent_probes.time > node_pmtu[i].mtu_recv_probes.time) {
 189                                 probe_interval = cur_time - node_pmtu[i].mtu_sent_probes.time;
 190                         } else {
 191                                 probe_interval = cur_time - node_pmtu[i].mtu_recv_probes.time;
 192                         }
 193
 194                         node_pmtu[i].mtu_ping.probes += 1;
 195                         node_pmtu[i].mtu_ping.time += probe_interval;
 196                         node_pmtu[i].mtu_ping.probes_total_len += probe_len;
 197                 }
 198
 199                 node_pmtu[i].mtu_recv_probes.time = cur_time;
 200
 201         } else if(sscanf(text, "Fixing MTU of %s to %d after %d probes", node_name, &mtu_len, &probes) == 3) {
 202                 static bool mtu_set = true;
 203
 204                 if(!node_shutdown_time && !strcasecmp("relay", node_name) && mtu_set) {
 205                         node_shutdown_time = cur_time + PING_TRACK_TIMEOUT;
 206                         mtu_set = false;
 207                 }
 208
 209                 find_node_index(i, node_name);
 210                 node_pmtu[i].mtu_discovery.probes = node_pmtu[i].mtu_recv_probes.probes + node_pmtu[i].mtu_sent_probes.probes;
 211                 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;
 212                 node_pmtu[i].mtu_discovery.time = cur_time - node_pmtu[i].mtu_start.time;
 213                 node_pmtu[i].mtu_discovery.count += 1;
 214                 node_pmtu[i].mtu_size = mtu_len;
 215
 216         } else if(sscanf(text, "SPTPS key exchange with %s successful", node_name) == 1) {
 217                 find_node_index(i, node_name);
 218                 node_pmtu[i].mtu_start.time = cur_time;
 219                 node_pmtu[i].mtu_start.count += 1;
 220                 memset(&node_pmtu[i].mtu_discovery, 0, sizeof(struct pmtu_attr_para));
 221                 memset(&node_pmtu[i].mtu_ping, 0, sizeof(struct pmtu_attr_para));
 222                 memset(&node_pmtu[i].mtu_increase, 0, sizeof(struct pmtu_attr_para));
 223
 224         } else if(sscanf(text, "Increase in PMTU to %s detected, restarting PMTU discovery", node_name) == 1) {
 225                 find_node_index(i, node_name);
 226                 node_pmtu[i].mtu_increase.time = cur_time - node_pmtu[i].mtu_start.time;
 227                 node_pmtu[i].mtu_increase.count += 1;
 228
 229         } else if(sscanf(text, "Trying to send MTU probe to unreachable or rekeying node %s", node_name) == 1) {
 230
 231         } else if(sscanf(text, "%s did not respond to UDP ping, restarting PMTU discovery", node_name) == 1) {
 232
 233         } else if(sscanf(text, "No response to MTU probes from %s", node_name) == 1) {
 234
 235         } else if((sscanf(text, "Connection with %s activated", node_name) == 1) || (sscanf(text, "Already connected to %s", node_name) == 1)) {
 236                 mesh_event_sock_send(client_id, META_CONN_SUCCESSFUL, node_name, sizeof(node_name));
 237
 238         } else if((sscanf(text, "Connection closed by %s", node_name) == 1) || (sscanf(text, "Closing connection with %s", node_name) == 1)) {
 239                 mesh_event_sock_send(client_id, META_CONN_CLOSED, node_name, sizeof(node_name));
 240
 241         }
 242 }
 243
 244 int main(int argc, char *argv[]) {
 245         struct timeval main_loop_wait = { 5, 0 };
 246         int i;
 247
 248         // Import mesh event handler
 249
 250         if((argv[CMD_LINE_ARG_CLIENTID]) && (argv[CMD_LINE_ARG_IMPORTSTR])) {
 251                 client_id = atoi(argv[CMD_LINE_ARG_CLIENTID]);
 252                 mesh_event_sock_connect(argv[CMD_LINE_ARG_IMPORTSTR]);
 253         }
 254
 255         setup_signals();
 256
 257         // Execute test steps
 258
 259         meshlink_handle_t *mesh = meshlink_open("testconf", argv[CMD_LINE_ARG_NODENAME],
 260                                                 "test_channel_conn", atoi(argv[CMD_LINE_ARG_DEVCLASS]));
 261         assert(mesh);
 262         meshlink_set_log_cb(mesh, MESHLINK_DEBUG, meshlink_logger);
 263         meshlink_set_node_status_cb(mesh, node_status_cb);
 264         meshlink_enable_discovery(mesh, false);
 265         sleep(1);
 266
 267         if(argv[CMD_LINE_ARG_INVITEURL]) {
 268                 int attempts;
 269                 bool join_ret;
 270
 271                 for(attempts = 0; attempts < 10; attempts++) {
 272                         join_ret = meshlink_join(mesh, argv[CMD_LINE_ARG_INVITEURL]);
 273
 274                         if(join_ret) {
 275                                 break;
 276                         }
 277
 278                         sleep(1);
 279                 }
 280
 281                 if(attempts == 10) {
 282                         abort();
 283                 }
 284         }
 285
 286         assert(meshlink_start(mesh));
 287
 288         // Wait for peer node to join
 289
 290         assert(wait_sync_flag(&peer_reachable, 10));
 291
 292         // Open a channel to peer node
 293
 294         meshlink_node_t *peer_node = meshlink_get_node(mesh, "peer");
 295         assert(peer_node);
 296         meshlink_channel_t *channel = meshlink_channel_open(mesh, peer_node, CHANNEL_PORT,
 297                                       channel_receive_cb, NULL, 0);
 298         meshlink_set_channel_poll_cb(mesh, channel, poll_cb);
 299
 300         assert(wait_sync_flag(&channel_opened, 30));
 301         assert(mesh_event_sock_send(client_id, CHANNEL_OPENED, NULL, 0));
 302
 303         // All test steps executed - wait for signals to stop/start or close the mesh
 304
 305         time_t time_stamp, send_time;
 306
 307         time_stamp = time(NULL);
 308         send_time = time_stamp + 10;
 309
 310         while(test_running) {
 311                 select(1, NULL, NULL, NULL, &main_loop_wait);
 312
 313                 time_stamp = time(NULL);
 314
 315                 if(time_stamp >= send_time) {
 316                         send_time = time_stamp + 10;
 317                         meshlink_channel_send(mesh, channel, "ping", 5);
 318                 }
 319         }
 320
 321         pmtu_attr_t send_mtu_data;
 322         send_mtu_data = node_pmtu[NODE_PMTU_PEER];
 323         print_mtu_calc(send_mtu_data);
 324         assert(mesh_event_sock_send(client_id, OPTIMAL_PMTU_PEER, &send_mtu_data, sizeof(send_mtu_data)));
 325         send_mtu_data = node_pmtu[NODE_PMTU_RELAY];
 326         print_mtu_calc(send_mtu_data);
 327         assert(mesh_event_sock_send(client_id, OPTIMAL_PMTU_RELAY, &send_mtu_data, sizeof(send_mtu_data)));
 328
 329         meshlink_close(mesh);
 330 }