--- /dev/null
+#include <assert.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/time.h>
+#include <time.h>
+
+#include "../src/meshlink.h"
+#include "utils.h"
+
+static struct sync_flag accept_flag;
+static struct sync_flag close_flag;
+
+struct client {
+ meshlink_handle_t *mesh;
+ meshlink_channel_t *channel;
+ size_t received;
+};
+
+static void log_cb(meshlink_handle_t *mesh, meshlink_log_level_t level, const char *text) {
+ static struct timeval tv0;
+ struct timeval tv;
+
+ if(tv0.tv_sec == 0) {
+ gettimeofday(&tv0, NULL);
+ }
+
+ gettimeofday(&tv, NULL);
+ fprintf(stderr, "%u.%.03u ", (unsigned int)(tv.tv_sec - tv0.tv_sec), (unsigned int)tv.tv_usec / 1000);
+
+ if(mesh) {
+ fprintf(stderr, "(%s) ", mesh->name);
+ }
+
+ fprintf(stderr, "[%d] %s\n", level, text);
+}
+
+static void server_receive_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *data, size_t len) {
+ (void)data;
+
+ // We expect no data from clients, apart from disconnections.
+ assert(len == 0);
+
+ meshlink_channel_t **c = mesh->priv;
+ int count = 0;
+
+ for(int i = 0; i < 3; i++) {
+ if(c[i] == channel) {
+ c[i] = NULL;
+ fprintf(stderr, "server received channel %d closure from %s\n", i, channel->node->name);
+
+ meshlink_channel_close(mesh, channel);
+ }
+
+ if(c[i]) {
+ count++;
+ }
+ }
+
+ if(!count) {
+ set_sync_flag(&close_flag, true);
+ }
+}
+
+static void client_receive_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *data, size_t len) {
+ (void)channel;
+ (void)data;
+
+ // We expect always the same amount of data from the server.
+ assert(len == 1000);
+ assert(mesh->priv);
+ struct client *client = mesh->priv;
+ client->received += len;
+}
+
+static void status_cb(meshlink_handle_t *mesh, meshlink_node_t *node, bool reachable) {
+ assert(mesh->priv);
+ struct client *client = mesh->priv;
+
+ assert(reachable);
+
+ if(!strcmp(node->name, "server")) {
+ assert(!client->channel);
+ client->channel = meshlink_channel_open_ex(mesh, node, 1, client_receive_cb, NULL, 0, MESHLINK_CHANNEL_UDP);
+ assert(client->channel);
+ }
+}
+
+static bool accept_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, uint16_t port, const void *data, size_t len) {
+ (void)data;
+ (void)len;
+
+ assert(port == 1);
+ assert(meshlink_channel_get_flags(mesh, channel) == MESHLINK_CHANNEL_UDP);
+ meshlink_set_channel_receive_cb(mesh, channel, server_receive_cb);
+
+ assert(mesh->priv);
+ meshlink_channel_t **c = mesh->priv;
+
+ for(int i = 0; i < 3; i++) {
+ if(c[i] == NULL) {
+ fprintf(stderr, "server accepted channel %d from %s\n", i, channel->node->name);
+ c[i] = channel;
+
+ if(i == 2) {
+ set_sync_flag(&accept_flag, true);
+ }
+
+ return true;
+ }
+ }
+
+ return false;
+}
+
+int main() {
+ //meshlink_set_log_cb(NULL, MESHLINK_DEBUG, log_cb);
+
+ // Open two new meshlink instance.
+
+ const char *names[3] = {"foo", "bar", "baz"};
+ struct client clients[3];
+ meshlink_channel_t *channels[3] = {NULL, NULL, NULL};
+ memset(clients, 0, sizeof(clients));
+
+ meshlink_handle_t *server = meshlink_open("channels_udp_conf.0", "server", "channels-udp", DEV_CLASS_BACKBONE);
+ assert(server);
+ meshlink_enable_discovery(server, false);
+ server->priv = channels;
+ meshlink_set_channel_accept_cb(server, accept_cb);
+ assert(meshlink_start(server));
+
+ for(int i = 0; i < 3; i++) {
+ char dir[100];
+ snprintf(dir, sizeof(dir), "channels_udp_conf.%d", i + 1);
+ clients[i].mesh = meshlink_open(dir, names[i], "channels-udp", DEV_CLASS_STATIONARY);
+ assert(clients[i].mesh);
+ clients[i].mesh->priv = &clients[i];
+ meshlink_enable_discovery(clients[i].mesh, false);
+ link_meshlink_pair(server, clients[i].mesh);
+ meshlink_set_node_status_cb(clients[i].mesh, status_cb);
+ assert(meshlink_start(clients[i].mesh));
+ }
+
+ // Wait for all three channels to connect
+
+ assert(wait_sync_flag(&accept_flag, 10));
+
+ for(int i = 0; i < 3; i++) {
+ assert(channels[i]);
+ assert(clients[i].channel);
+ }
+
+ // Stream packets from server to clients for 5 seconds at 40 Mbps (1 kB * 500 Hz)
+
+ char data[1000];
+
+ for(int j = 0; j < 2500; j++) {
+ for(int i = 0; i < 3; i++) {
+ assert(meshlink_channel_send(server, channels[i], data, sizeof(data)) == sizeof(data));
+ }
+
+ const struct timespec req = {0, 2000000};
+ clock_nanosleep(CLOCK_MONOTONIC, 0, &req, NULL);
+ }
+
+ // Let the clients close the channels
+
+ for(int i = 0; i < 3; i++) {
+ meshlink_channel_close(clients[i].mesh, clients[i].channel);
+ meshlink_set_node_status_cb(clients[i].mesh, NULL);
+ }
+
+ assert(wait_sync_flag(&close_flag, 10));
+
+ // Check that the clients have received (most of) the data
+
+ for(int i = 0; i < 3; i++) {
+ fprintf(stderr, "%s received %zu\n", clients[i].mesh->name, clients[i].received);
+ }
+
+ for(int i = 0; i < 3; i++) {
+ assert(clients[i].received >= 2400000);
+ assert(clients[i].received <= 2500000);
+ }
+
+ // Clean up.
+
+ for(int i = 0; i < 3; i++) {
+ meshlink_close(clients[i].mesh);
+ }
+
+ meshlink_close(server);
+
+ return 0;
+}
projects / meshlink / blobdiff