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.
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"
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
43 static int client_id = -1;
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};
48 static void node_status_cb(meshlink_handle_t *mesh, meshlink_node_t *node,
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);
53 static pmtu_attr_t node_pmtu[2];
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);
64 if(node_pmtu.mtu_ping.probes) {
65 avg = (float)node_pmtu.mtu_ping.time / (float)node_pmtu.mtu_ping.probes;
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);
73 static void node_status_cb(meshlink_handle_t *mesh, meshlink_node_t *node,
75 if(!strcasecmp(node->name, "peer") && reachable) {
76 set_sync_flag(&peer_reachable, true);
79 mesh_event_sock_send(client_id, reachable ? NODE_JOINED : NODE_LEFT, node->name, 100);
83 static void poll_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, size_t len) {
85 meshlink_set_channel_poll_cb(mesh, channel, NULL);
86 assert(meshlink_channel_send(mesh, channel, "test", 5) >= 0);
90 static bool channel_accept(meshlink_handle_t *mesh, meshlink_channel_t *channel, uint16_t port, const void *dat, size_t len) {
94 assert(port == CHANNEL_PORT);
96 if(!strcmp(channel->node->name, "peer")) {
97 meshlink_set_channel_receive_cb(mesh, channel, channel_receive_cb);
106 /* channel receive callback */
107 static void channel_receive_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *dat, size_t len) {
109 mesh_event_sock_send(client_id, ERR_NETWORK, channel->node->name, 100);
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);
125 void meshlink_logger(meshlink_handle_t *mesh, meshlink_log_level_t level,
136 time_t probe_interval;
138 cur_time = time(NULL);
139 assert(cur_time != -1);
141 static time_t node_shutdown_time = 0;
142 bool mtu_probe = false;
144 if(node_shutdown_time && cur_time >= node_shutdown_time) {
145 test_running = false;
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",
156 fprintf(stderr, "%s:\x1b[0m %s\n", levelstr[level], text);
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;
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;
167 probe_interval = cur_time - node_pmtu[i].mtu_recv_probes.time;
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;
175 node_pmtu[i].mtu_sent_probes.time = cur_time;
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;
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;
186 probe_interval = cur_time - node_pmtu[i].mtu_recv_probes.time;
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;
194 node_pmtu[i].mtu_recv_probes.time = cur_time;
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;
199 if(!node_shutdown_time && !strcasecmp("relay", node_name) && mtu_set) {
200 node_shutdown_time = cur_time + PING_TRACK_TIMEOUT;
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;
211 } else if(sscanf(text, "SPTPS key exchange with %s successful", 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));
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;
224 } else if(sscanf(text, "Trying to send MTU probe to unreachable or rekeying node %s", node_name) == 1) {
226 } else if(sscanf(text, "%s did not respond to UDP ping, restarting PMTU discovery", node_name) == 1) {
228 } else if(sscanf(text, "No response to MTU probes from %s", node_name) == 1) {
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));
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));
239 int main(int argc, char *argv[]) {
240 struct timeval main_loop_wait = { 5, 0 };
243 // Import mesh event handler
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]);
252 // Execute test steps
254 meshlink_handle_t *mesh = meshlink_open("testconf", argv[CMD_LINE_ARG_NODENAME],
255 "test_channel_conn", atoi(argv[CMD_LINE_ARG_DEVCLASS]));
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);
262 if(argv[CMD_LINE_ARG_INVITEURL]) {
266 for(attempts = 0; attempts < 10; attempts++) {
267 join_ret = meshlink_join(mesh, argv[CMD_LINE_ARG_INVITEURL]);
281 assert(meshlink_start(mesh));
283 // Wait for peer node to join
285 assert(wait_sync_flag(&peer_reachable, 10));
287 // Open a channel to peer node
289 meshlink_node_t *peer_node = meshlink_get_node(mesh, "peer");
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);
295 assert(wait_sync_flag(&channel_opened, 30));
296 assert(mesh_event_sock_send(client_id, CHANNEL_OPENED, NULL, 0));
298 // All test steps executed - wait for signals to stop/start or close the mesh
300 time_t time_stamp, send_time;
302 time_stamp = time(NULL);
303 send_time = time_stamp + 10;
305 while(test_running) {
306 select(1, NULL, NULL, NULL, &main_loop_wait);
308 time_stamp = time(NULL);
310 if(time_stamp >= send_time) {
311 send_time = time_stamp + 10;
312 meshlink_channel_send(mesh, channel, "ping", 5);
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)));
324 meshlink_close(mesh);