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>
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.
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.
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.
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"
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
48 static int client_id = -1;
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};
53 static void node_status_cb(meshlink_handle_t *mesh, meshlink_node_t *node,
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);
58 static pmtu_attr_t node_pmtu[2];
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);
69 if(node_pmtu.mtu_ping.probes) {
70 avg = (float)node_pmtu.mtu_ping.time / (float)node_pmtu.mtu_ping.probes;
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);
78 static void node_status_cb(meshlink_handle_t *mesh, meshlink_node_t *node,
80 if(!strcasecmp(node->name, "peer") && reachable) {
81 set_sync_flag(&peer_reachable, true);
84 mesh_event_sock_send(client_id, reachable ? NODE_JOINED : NODE_LEFT, node->name, 100);
88 static void poll_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, size_t len) {
90 meshlink_set_channel_poll_cb(mesh, channel, NULL);
91 assert(meshlink_channel_send(mesh, channel, "test", 5) >= 0);
95 static bool channel_accept(meshlink_handle_t *mesh, meshlink_channel_t *channel, uint16_t port, const void *dat, size_t len) {
99 assert(port == CHANNEL_PORT);
101 if(!strcmp(channel->node->name, "peer")) {
102 meshlink_set_channel_receive_cb(mesh, channel, channel_receive_cb);
103 mesh->priv = channel;
111 /* channel receive callback */
112 static void channel_receive_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *dat, size_t len) {
114 mesh_event_sock_send(client_id, ERR_NETWORK, channel->node->name, 100);
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);
130 void meshlink_logger(meshlink_handle_t *mesh, meshlink_log_level_t level,
141 time_t probe_interval;
143 cur_time = time(NULL);
144 assert(cur_time != -1);
146 static time_t node_shutdown_time = 0;
147 bool mtu_probe = false;
149 if(node_shutdown_time && cur_time >= node_shutdown_time) {
150 test_running = false;
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",
161 fprintf(stderr, "%s:\x1b[0m %s\n", levelstr[level], text);
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;
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;
172 probe_interval = cur_time - node_pmtu[i].mtu_recv_probes.time;
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;
180 node_pmtu[i].mtu_sent_probes.time = cur_time;
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;
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;
191 probe_interval = cur_time - node_pmtu[i].mtu_recv_probes.time;
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;
199 node_pmtu[i].mtu_recv_probes.time = cur_time;
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;
204 if(!node_shutdown_time && !strcasecmp("relay", node_name) && mtu_set) {
205 node_shutdown_time = cur_time + PING_TRACK_TIMEOUT;
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;
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));
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;
229 } else if(sscanf(text, "Trying to send MTU probe to unreachable or rekeying node %s", node_name) == 1) {
231 } else if(sscanf(text, "%s did not respond to UDP ping, restarting PMTU discovery", node_name) == 1) {
233 } else if(sscanf(text, "No response to MTU probes from %s", node_name) == 1) {
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));
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));
244 int main(int argc, char *argv[]) {
245 struct timeval main_loop_wait = { 5, 0 };
248 // Import mesh event handler
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]);
257 // Execute test steps
259 meshlink_handle_t *mesh = meshlink_open("testconf", argv[CMD_LINE_ARG_NODENAME],
260 "test_channel_conn", atoi(argv[CMD_LINE_ARG_DEVCLASS]));
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);
267 if(argv[CMD_LINE_ARG_INVITEURL]) {
271 for(attempts = 0; attempts < 10; attempts++) {
272 join_ret = meshlink_join(mesh, argv[CMD_LINE_ARG_INVITEURL]);
286 assert(meshlink_start(mesh));
288 // Wait for peer node to join
290 assert(wait_sync_flag(&peer_reachable, 10));
292 // Open a channel to peer node
294 meshlink_node_t *peer_node = meshlink_get_node(mesh, "peer");
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);
300 assert(wait_sync_flag(&channel_opened, 30));
301 assert(mesh_event_sock_send(client_id, CHANNEL_OPENED, NULL, 0));
303 // All test steps executed - wait for signals to stop/start or close the mesh
305 time_t time_stamp, send_time;
307 time_stamp = time(NULL);
308 send_time = time_stamp + 10;
310 while(test_running) {
311 select(1, NULL, NULL, NULL, &main_loop_wait);
313 time_stamp = time(NULL);
315 if(time_stamp >= send_time) {
316 send_time = time_stamp + 10;
317 meshlink_channel_send(mesh, channel, "ping", 5);
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)));
329 meshlink_close(mesh);