--- /dev/null
+/*
+ node_sim_nut.c -- Implementation of Node Simulation for Meshlink Testing
+ for meta connection test case 01 - re-connection of
+ two nodes when relay node goes down
+ Copyright (C) 2019 Guus Sliepen <guus@meshlink.io>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along
+ with this program; if not, write to the Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <pthread.h>
+#include <assert.h>
+#include <signal.h>
+#include <time.h>
+#include "../common/common_handlers.h"
+#include "../common/test_step.h"
+#include "../common/mesh_event_handler.h"
+#include "../../utils.h"
+#include "../run_blackbox_tests/test_optimal_pmtu.h"
+
+#define CMD_LINE_ARG_NODENAME 1
+#define CMD_LINE_ARG_DEVCLASS 2
+#define CMD_LINE_ARG_CLIENTID 3
+#define CMD_LINE_ARG_IMPORTSTR 4
+#define CMD_LINE_ARG_INVITEURL 5
+#define CHANNEL_PORT 1234
+
+#pragma pack(1)
+
+static int client_id = -1;
+
+static struct sync_flag peer_reachable = {.mutex = PTHREAD_MUTEX_INITIALIZER, .cond = PTHREAD_COND_INITIALIZER};
+static struct sync_flag channel_opened = {.mutex = PTHREAD_MUTEX_INITIALIZER, .cond = PTHREAD_COND_INITIALIZER};
+
+static void node_status_cb(meshlink_handle_t *mesh, meshlink_node_t *node,
+ bool reachable);
+static void channel_receive_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *dat, size_t len);
+static bool channel_accept(meshlink_handle_t *mesh, meshlink_channel_t *channel, uint16_t port, const void *dat, size_t len);
+
+static pmtu_attr_t node_pmtu[2];
+
+static void print_mtu_calc(pmtu_attr_t node_pmtu) {
+ fprintf(stderr, "MTU size : %d\n", node_pmtu.mtu_size);
+ fprintf(stderr, "Probes took for calculating PMTU discovery : %d\n", node_pmtu.mtu_discovery.probes);
+ fprintf(stderr, "Probes total length took for calculating PMTU discovery : %d\n", node_pmtu.mtu_discovery.probes_total_len);
+ fprintf(stderr, "Time took for calculating PMTU discovery : %lu\n", node_pmtu.mtu_discovery.time);
+ fprintf(stderr, "Total MTU ping probes : %d\n", node_pmtu.mtu_ping.probes);
+ fprintf(stderr, "Total MTU ping probes length : %d\n", node_pmtu.mtu_ping.probes_total_len);
+ float avg = 0;
+
+ if(node_pmtu.mtu_ping.probes) {
+ avg = (float)node_pmtu.mtu_ping.time / (float)node_pmtu.mtu_ping.probes;
+ }
+
+ fprintf(stderr, "Average MTU ping probes ping time : %f\n", avg);
+ fprintf(stderr, "Total probes received %d\n", node_pmtu.mtu_recv_probes.probes);
+ fprintf(stderr, "Total probes sent %d\n", node_pmtu.mtu_sent_probes.probes);
+}
+
+// Node status callback
+static void node_status_cb(meshlink_handle_t *mesh, meshlink_node_t *node,
+ bool reachable) {
+ // Signal pthread_cond_wait if peer is reachable
+ if(!strcasecmp(node->name, "peer") && reachable) {
+ set_sync_flag(&peer_reachable, true);
+ }
+
+ // Notify the JOIN or LEFT event of a node to the test driver
+ mesh_event_sock_send(client_id, reachable ? NODE_JOINED : NODE_LEFT, node->name, 100);
+ return;
+}
+
+// Channel poll callback
+static void poll_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, size_t len) {
+ (void)len;
+ meshlink_set_channel_poll_cb(mesh, channel, NULL);
+
+ // Send data via channel to trigger UDP peer to peer hole punching
+ assert(meshlink_channel_send(mesh, channel, "test", 5) >= 0);
+ return;
+}
+
+static bool channel_accept(meshlink_handle_t *mesh, meshlink_channel_t *channel, uint16_t port, const void *dat, size_t len) {
+ (void)dat;
+ (void)len;
+
+ assert(port == CHANNEL_PORT);
+
+ // If the channel is from peer node set receive callback for it else reject the channel
+ if(!strcmp(channel->node->name, "peer")) {
+ meshlink_set_channel_receive_cb(mesh, channel, channel_receive_cb);
+ mesh->priv = channel;
+
+ return true;
+ }
+
+ return false;
+}
+
+/* channel receive callback */
+static void channel_receive_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *dat, size_t len) {
+ if(len == 0) {
+ mesh_event_sock_send(client_id, ERR_NETWORK, channel->node->name, 100);
+ return;
+ }
+
+ if(!strcmp(channel->node->name, "peer")) {
+ if(!memcmp(dat, "reply", 5)) {
+ set_sync_flag(&channel_opened, true);
+ fprintf(stderr, "GOT REPLY FROM PEER\n");
+ } else if(!memcmp(dat, "test", 5)) {
+ assert(meshlink_channel_send(mesh, channel, "reply", 5) >= 0);
+ }
+ }
+
+ return;
+}
+
+// Meshlink log handler
+void meshlink_logger(meshlink_handle_t *mesh, meshlink_log_level_t level,
+ const char *text) {
+ (void)mesh;
+ (void)level;
+ int probe_len;
+ int mtu_len;
+ int probes;
+ char node_name[100];
+ int i = -1;
+
+ time_t cur_time;
+ time_t probe_interval;
+
+ cur_time = time(NULL);
+ assert(cur_time != -1);
+
+ static time_t node_shutdown_time = 0;
+ bool mtu_probe = false;
+
+ if(node_shutdown_time && cur_time >= node_shutdown_time) {
+ test_running = false;
+ }
+
+ static const char *levelstr[] = {
+ [MESHLINK_DEBUG] = "\x1b[34mDEBUG",
+ [MESHLINK_INFO] = "\x1b[32mINFO",
+ [MESHLINK_WARNING] = "\x1b[33mWARNING",
+ [MESHLINK_ERROR] = "\x1b[31mERROR",
+ [MESHLINK_CRITICAL] = "\x1b[31mCRITICAL",
+ };
+
+ fprintf(stderr, "%s:\x1b[0m %s\n", levelstr[level], text);
+
+ /* Calculate the MTU parameter values from the meshlink logs */
+ if(sscanf(text, "Sending MTU probe length %d to %s", &probe_len, node_name) == 2) {
+ find_node_index(i, node_name);
+ node_pmtu[i].mtu_sent_probes.probes += 1;
+ node_pmtu[i].mtu_sent_probes.probes_total_len += probe_len;
+
+ if(node_pmtu[i].mtu_size) {
+ if(node_pmtu[i].mtu_sent_probes.time > node_pmtu[i].mtu_recv_probes.time) {
+ probe_interval = cur_time - node_pmtu[i].mtu_sent_probes.time;
+ } else {
+ probe_interval = cur_time - node_pmtu[i].mtu_recv_probes.time;
+ }
+
+ node_pmtu[i].mtu_ping.probes += 1;
+ node_pmtu[i].mtu_ping.time += probe_interval;
+ node_pmtu[i].mtu_ping.probes_total_len += probe_len;
+ }
+
+ node_pmtu[i].mtu_sent_probes.time = cur_time;
+
+ } else if(sscanf(text, "Got MTU probe length %d from %s", &probe_len, node_name) == 2) {
+ find_node_index(i, node_name);
+ node_pmtu[i].mtu_recv_probes.probes += 1;
+ node_pmtu[i].mtu_recv_probes.probes_total_len += probe_len;
+
+ if(node_pmtu[i].mtu_size) {
+ if(node_pmtu[i].mtu_sent_probes.time > node_pmtu[i].mtu_recv_probes.time) {
+ probe_interval = cur_time - node_pmtu[i].mtu_sent_probes.time;
+ } else {
+ probe_interval = cur_time - node_pmtu[i].mtu_recv_probes.time;
+ }
+
+ node_pmtu[i].mtu_ping.probes += 1;
+ node_pmtu[i].mtu_ping.time += probe_interval;
+ node_pmtu[i].mtu_ping.probes_total_len += probe_len;
+ }
+
+ node_pmtu[i].mtu_recv_probes.time = cur_time;
+
+ } else if(sscanf(text, "Fixing MTU of %s to %d after %d probes", node_name, &mtu_len, &probes) == 3) {
+ static bool mtu_set = true;
+
+ if(!node_shutdown_time && !strcasecmp("relay", node_name) && mtu_set) {
+ node_shutdown_time = cur_time + PING_TRACK_TIMEOUT;
+ mtu_set = false;
+ }
+
+ find_node_index(i, node_name);
+ node_pmtu[i].mtu_discovery.probes = node_pmtu[i].mtu_recv_probes.probes + node_pmtu[i].mtu_sent_probes.probes;
+ 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;
+ node_pmtu[i].mtu_discovery.time = cur_time - node_pmtu[i].mtu_start.time;
+ node_pmtu[i].mtu_discovery.count += 1;
+ node_pmtu[i].mtu_size = mtu_len;
+
+ } else if(sscanf(text, "SPTPS key exchange with %s succesful", node_name) == 1) {
+ find_node_index(i, node_name);
+ node_pmtu[i].mtu_start.time = cur_time;
+ node_pmtu[i].mtu_start.count += 1;
+ memset(&node_pmtu[i].mtu_discovery, 0, sizeof(struct pmtu_attr_para));
+ memset(&node_pmtu[i].mtu_ping, 0, sizeof(struct pmtu_attr_para));
+ memset(&node_pmtu[i].mtu_increase, 0, sizeof(struct pmtu_attr_para));
+
+ } else if(sscanf(text, "Increase in PMTU to %s detected, restarting PMTU discovery", node_name) == 1) {
+ find_node_index(i, node_name);
+ node_pmtu[i].mtu_increase.time = cur_time - node_pmtu[i].mtu_start.time;
+ node_pmtu[i].mtu_increase.count += 1;
+
+ } else if(sscanf(text, "Trying to send MTU probe to unreachable or rekeying node %s", node_name) == 1) {
+
+ } else if(sscanf(text, "%s did not respond to UDP ping, restarting PMTU discovery", node_name) == 1) {
+
+ } else if(sscanf(text, "No response to MTU probes from %s", node_name) == 1) {
+
+ } else if((sscanf(text, "Connection with %s activated", node_name) == 1) || (sscanf(text, "Already connected to %s", node_name) == 1)) {
+ mesh_event_sock_send(client_id, META_CONN_SUCCESSFUL, node_name, sizeof(node_name));
+
+ } else if((sscanf(text, "Connection closed by %s", node_name) == 1) || (sscanf(text, "Closing connection with %s", node_name) == 1)) {
+ mesh_event_sock_send(client_id, META_CONN_CLOSED, node_name, sizeof(node_name));
+
+ }
+}
+
+int main(int argc, char *argv[]) {
+ struct timeval main_loop_wait = { 5, 0 };
+ int i;
+
+ // Import mesh event handler
+
+ if((argv[CMD_LINE_ARG_CLIENTID]) && (argv[CMD_LINE_ARG_IMPORTSTR])) {
+ client_id = atoi(argv[CMD_LINE_ARG_CLIENTID]);
+ mesh_event_sock_connect(argv[CMD_LINE_ARG_IMPORTSTR]);
+ }
+
+ setup_signals();
+
+ // Execute test steps
+
+ meshlink_handle_t *mesh = meshlink_open("testconf", argv[CMD_LINE_ARG_NODENAME],
+ "test_channel_conn", atoi(argv[CMD_LINE_ARG_DEVCLASS]));
+ assert(mesh);
+ meshlink_set_log_cb(mesh, MESHLINK_DEBUG, meshlink_logger);
+ meshlink_set_node_status_cb(mesh, node_status_cb);
+ meshlink_enable_discovery(mesh, false);
+ sleep(1);
+
+ // Join relay node and if fails to join then try few more attempts
+
+ if(argv[CMD_LINE_ARG_INVITEURL]) {
+ int attempts;
+ bool join_ret;
+
+ for(attempts = 0; attempts < 10; attempts++) {
+ join_ret = meshlink_join(mesh, argv[CMD_LINE_ARG_INVITEURL]);
+
+ if(join_ret) {
+ break;
+ }
+
+ sleep(1);
+ }
+
+ if(attempts == 10) {
+ abort();
+ }
+ }
+
+ assert(meshlink_start(mesh));
+
+ // Wait for peer node to join
+
+ assert(wait_sync_flag(&peer_reachable, 10));
+
+ // Open a channel to peer node
+
+ meshlink_node_t *peer_node = meshlink_get_node(mesh, "peer");
+ assert(peer_node);
+ meshlink_channel_t *channel = meshlink_channel_open(mesh, peer_node, CHANNEL_PORT,
+ channel_receive_cb, NULL, 0);
+ meshlink_set_channel_poll_cb(mesh, channel, poll_cb);
+
+ assert(wait_sync_flag(&channel_opened, 30));
+ assert(mesh_event_sock_send(client_id, CHANNEL_OPENED, NULL, 0));
+
+ // All test steps executed - wait for signals to stop/start or close the mesh
+
+ while(test_running) {
+ select(1, NULL, NULL, NULL, &main_loop_wait);
+ }
+
+ // Send MTU probe parameters data to the test driver
+
+ pmtu_attr_t send_mtu_data;
+ send_mtu_data = node_pmtu[NODE_PMTU_PEER];
+ print_mtu_calc(send_mtu_data);
+ assert(mesh_event_sock_send(client_id, OPTIMAL_PMTU_PEER, &send_mtu_data, sizeof(send_mtu_data)));
+ send_mtu_data = node_pmtu[NODE_PMTU_RELAY];
+ print_mtu_calc(send_mtu_data);
+ assert(mesh_event_sock_send(client_id, OPTIMAL_PMTU_RELAY, &send_mtu_data, sizeof(send_mtu_data)));
+
+ meshlink_close(mesh);
+}
projects / meshlink / blobdiff