+++ /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.
-*/
-
-#ifdef NDEBUG
-#undef NDEBUG
-#endif
-
-#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/network_namespace_framework.h"
-#include "../../utils.h"
-#include "../run_blackbox_tests/test_optimal_pmtu.h"
-
-extern bool test_pmtu_nut_running;
-extern bool test_pmtu_peer_running;
-extern bool test_pmtu_relay_running;
-extern struct sync_flag test_pmtu_nut_closed;
-extern bool ping_channel_enable_07;
-
-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);
-
-pmtu_attr_t node_pmtu[2];
-static time_t node_shutdown_time = 0;
-static bool mtu_set = true;
-
-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) {
- (void)mesh;
-
- // Signal pthread_cond_wait if peer is reachable
- if(!strcasecmp(node->name, "peer") && reachable) {
- set_sync_flag(&peer_reachable, true);
- }
-
- 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;
-}
-
-/* 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) {
- fail();
- return;
- }
-
- if(!strcmp(channel->node->name, "peer")) {
- if(!memcmp(dat, "reply", 5)) {
- set_sync_flag(&channel_opened, true);
- } else if(!memcmp(dat, "test", 5)) {
- assert(meshlink_channel_send(mesh, channel, "reply", 5) >= 0);
- }
- }
-
- return;
-}
-
-// Meshlink log handler
-static 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);
-
- if(node_shutdown_time && cur_time >= node_shutdown_time) {
- test_pmtu_nut_running = false;
- }
-
- if(level == MESHLINK_INFO) {
- fprintf(stderr, "\x1b[32m nut:\x1b[0m %s\n", 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) {
-
- if(!node_shutdown_time && !strcasecmp("peer", 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 successful", 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)) {
-
- } else if((sscanf(text, "Connection closed by %s", node_name) == 1) || (sscanf(text, "Closing connection with %s", node_name) == 1)) {
- }
-}
-
-void *node_sim_pmtu_nut_01(void *arg) {
- mesh_arg_t *mesh_arg = (mesh_arg_t *)arg;
- struct timeval main_loop_wait = { 5, 0 };
-
- set_sync_flag(&peer_reachable, false);
- set_sync_flag(&channel_opened, false);
- node_shutdown_time = 0;
- mtu_set = true;
-
- // Run relay node instance
-
- meshlink_handle_t *mesh;
- mesh = meshlink_open(mesh_arg->node_name, mesh_arg->confbase, mesh_arg->app_name, mesh_arg->dev_class);
- assert(mesh);
- meshlink_set_log_cb(mesh, MESHLINK_DEBUG, meshlink_logger);
- meshlink_set_node_status_cb(mesh, node_status_cb);
- sleep(1);
-
- // Join relay node and if fails to join then try few more attempts
-
- if(mesh_arg->join_invitation) {
- int attempts;
- bool join_ret;
-
- for(attempts = 0; attempts < 10; attempts++) {
- join_ret = meshlink_join(mesh, mesh_arg->join_invitation);
-
- if(join_ret) {
- break;
- }
-
- sleep(1);
- }
-
- if(attempts == 10) {
- fail();
- }
- }
-
- 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));
-
- // All test steps executed - wait for signals to stop/start or close the mesh
-
- time_t time_stamp, send_time;
-
- time_stamp = time(NULL);
- send_time = time_stamp + 10;
-
- while(test_pmtu_nut_running) {
- select(1, NULL, NULL, NULL, &main_loop_wait);
-
- // Ping the channel for every 10 seconds if ping_channel_enable_07 is enabled
-
- if(ping_channel_enable_07) {
- time_stamp = time(NULL);
-
- if(time_stamp >= send_time) {
- send_time = time_stamp + 10;
- assert(meshlink_channel_send(mesh, channel, "ping", 5) == 5);
- }
- }
- }
-
- // Send MTU probe parameters data to the test driver
- meshlink_close(mesh);
-
- set_sync_flag(&test_pmtu_nut_closed, true);
- fprintf(stderr, "NODE_PMTU_PEER :\n");
- print_mtu_calc(node_pmtu[NODE_PMTU_PEER]);
- fprintf(stderr, "\nNODE_PMTU_RELAY :\n");
- print_mtu_calc(node_pmtu[NODE_PMTU_RELAY]);
-
- return NULL;
-}
projects / meshlink-tiny / blobdiff