2 node_sim_peer.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"
33 #define CMD_LINE_ARG_NODENAME 1
34 #define CMD_LINE_ARG_DEVCLASS 2
35 #define CMD_LINE_ARG_CLIENTID 3
36 #define CMD_LINE_ARG_IMPORTSTR 4
37 #define CMD_LINE_ARG_INVITEURL 5
38 #define CHANNEL_PORT 1234
40 static void channel_receive_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *dat, size_t len);
41 static bool channel_accept(meshlink_handle_t *mesh, meshlink_channel_t *channel, uint16_t port, const void *dat, size_t len);
43 static int client_id = -1;
44 static meshlink_handle_t *mesh = NULL;
46 static struct sync_flag peer_reachable = {.mutex = PTHREAD_MUTEX_INITIALIZER, .cond = PTHREAD_COND_INITIALIZER, .flag = false};
47 static struct sync_flag start_test = {.mutex = PTHREAD_MUTEX_INITIALIZER, .cond = PTHREAD_COND_INITIALIZER, .flag = false};
48 static struct sync_flag app_reachable = {.mutex = PTHREAD_MUTEX_INITIALIZER, .cond = PTHREAD_COND_INITIALIZER, .flag = false};
49 static struct sync_flag channel_opened = {.mutex = PTHREAD_MUTEX_INITIALIZER, .cond = PTHREAD_COND_INITIALIZER, .flag = false};
50 static struct sync_flag channel_data_recieved = {.mutex = PTHREAD_MUTEX_INITIALIZER, .cond = PTHREAD_COND_INITIALIZER, .flag = false};
52 static void send_event(mesh_event_t event) {
55 for(attempts = 0; attempts < 5; attempts += 1) {
56 if(mesh_event_sock_send(client_id, event, NULL, 0)) {
66 static bool channel_accept(meshlink_handle_t *mesh, meshlink_channel_t *channel, uint16_t port, const void *dat, size_t len) {
70 assert(port == CHANNEL_PORT);
72 fprintf(stderr, "\tapp1node2 got channel request from %s\n", channel->node->name);
74 if(!strcmp(channel->node->name, "corenode1")) {
75 meshlink_set_channel_receive_cb(mesh, channel, channel_receive_cb);
84 /* channel receive callback */
85 static void channel_receive_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *dat, size_t len) {
91 fprintf(stderr, "\tapp1node2 got error from %s at %lu\n", channel->node->name, time(NULL));
92 send_event(ERR_NETWORK);
96 memcpy(data, dat, len);
98 fprintf(stderr, "\tapp1node2 got message from %s as %s\n", channel->node->name, data);
100 if(!strcmp(channel->node->name, "corenode1")) {
101 if(!memcmp(dat, "Channel Message", len)) {
102 set_sync_flag(&channel_data_recieved, true);
103 } else if(!memcmp(dat, "failure", 7)) {
106 } else if(!strcmp(channel->node->name, "app1node1")) {
107 if(!memcmp(dat, "Channel Message", len)) {
108 set_sync_flag(&channel_data_recieved, true);
109 } else if(!memcmp(dat, "failure", 7)) {
119 static void poll_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, size_t len) {
120 char *message = "Channel Message";
121 char *node = (char *)channel->node->name;
123 meshlink_set_channel_poll_cb(mesh, channel, NULL);
124 fprintf(stderr, "\tapp1node2's Channel request has been accepted by %s at : %lu\n", node, time(NULL));
125 set_sync_flag(&channel_opened, true);
126 assert(meshlink_channel_send(mesh, channel, message, strlen(message)) >= 0);
131 static void node_status_cb(meshlink_handle_t *mesh, meshlink_node_t *node, bool reachable) {
134 if(!strcasecmp(node->name, "corenode1")) {
136 fprintf(stderr, "\tNode corenode1 became reachable\n");
137 set_sync_flag(&peer_reachable, true);
139 } else if(!strcasecmp(node->name, "app1node1")) {
141 fprintf(stderr, "\tNode app1node1 became reachable\n");
142 set_sync_flag(&app_reachable, true);
149 void mesh_start_test_handler(int signum) {
152 fprintf(stderr, "Starting test in app1node2\n");
153 set_sync_flag(&start_test, true);
156 int main(int argc, char *argv[]) {
160 struct timeval main_loop_wait = { 2, 0 };
161 meshlink_channel_t *channel = NULL;
162 meshlink_node_t *core_node = NULL;
163 meshlink_node_t **node_handles = NULL;
164 meshlink_submesh_t *submesh = NULL;
166 fprintf(stderr, "\tMesh node 'app1node2' starting up........\n");
168 // Import mesh event handler
170 if((argv[CMD_LINE_ARG_CLIENTID]) && (argv[CMD_LINE_ARG_IMPORTSTR])) {
171 client_id = atoi(argv[CMD_LINE_ARG_CLIENTID]);
172 mesh_event_sock_connect(argv[CMD_LINE_ARG_IMPORTSTR]);
175 // Setup required signals
178 signal(SIGIO, mesh_start_test_handler);
180 // Run peer node instance
182 mesh = meshlink_open("app1node2conf", argv[CMD_LINE_ARG_NODENAME],
183 "test_channel_conn", atoi(argv[CMD_LINE_ARG_DEVCLASS]));
185 meshlink_set_log_cb(mesh, MESHLINK_DEBUG, meshlink_callback_logger);
186 meshlink_set_channel_accept_cb(mesh, channel_accept);
187 meshlink_set_node_status_cb(mesh, node_status_cb);
189 if(argv[CMD_LINE_ARG_INVITEURL]) {
190 assert(meshlink_join(mesh, argv[CMD_LINE_ARG_INVITEURL]));
193 assert(meshlink_start(mesh));
195 send_event(NODE_STARTED);
197 // Wait for peer node to join
199 assert(wait_sync_flag(&peer_reachable, 15));
200 send_event(NODE_JOINED);
202 while(false == wait_sync_flag(&start_test, 10));
204 // Open a channel to peer node
205 core_node = meshlink_get_node(mesh, "corenode1");
207 fprintf(stderr, "\tapp1node2 Sending Channel request to corenode1 at : %lu\n", time(NULL));
208 channel = meshlink_channel_open(mesh, core_node, CHANNEL_PORT,
209 channel_receive_cb, NULL, 0);
210 meshlink_set_channel_poll_cb(mesh, channel, poll_cb);
211 assert(wait_sync_flag(&channel_opened, 15));
212 send_event(CHANNEL_OPENED);
214 assert(wait_sync_flag(&channel_data_recieved, 30));
215 send_event(CHANNEL_DATA_RECIEVED);
217 // Open a channel to peer node
218 channel_opened.flag = false;
219 channel_data_recieved.flag = false;
221 assert(wait_sync_flag(&app_reachable, 60));
223 core_node = meshlink_get_node(mesh, "app1node1");
225 fprintf(stderr, "\tapp1node2 Sending Channel request to app1node1 at : %lu\n", time(NULL));
226 channel = meshlink_channel_open(mesh, core_node, CHANNEL_PORT,
227 channel_receive_cb, NULL, 0);
228 meshlink_set_channel_poll_cb(mesh, channel, poll_cb);
229 assert(wait_sync_flag(&channel_opened, 30));
230 send_event(CHANNEL_OPENED);
232 assert(wait_sync_flag(&channel_data_recieved, 30));
233 send_event(CHANNEL_DATA_RECIEVED);
236 node_handles = meshlink_get_all_nodes(mesh, NULL, &num_nodes);
237 fprintf(stderr, "\tGot %d nodes in list with error : %s\n", (int)num_nodes, meshlink_strerror(meshlink_errno));
238 assert(node_handles);
239 assert((num_nodes == 4));
241 for(i = 0; i < num_nodes; i++) {
242 fprintf(stderr, "\tChecking the node : %s\n", node_handles[i]->name);
244 if((0 == strcmp(node_handles[i]->name, "app2node1")) || (0 == strcmp(node_handles[i]->name, "app2node2"))) {
245 send_event(SIG_ABORT);
250 meshlink_node_t *node = meshlink_get_self(mesh);
252 submesh = meshlink_get_node_submesh(mesh, node);
255 node_handles = meshlink_get_all_nodes_by_submesh(mesh, submesh, node_handles, &num_nodes);
256 assert(node_handles);
257 assert((num_nodes == 2));
259 for(i = 0; i < num_nodes; i++) {
260 fprintf(stderr, "\tChecking the node : %s\n", node_handles[i]->name);
262 if((0 == strcmp(node_handles[i]->name, "app2node1")) || (0 == strcmp(node_handles[i]->name, "app2node2"))) {
263 send_event(SIG_ABORT);
268 submesh = meshlink_get_submesh(mesh, "app1");
270 if(submesh == NULL) {
271 fprintf(stderr, "\tapp1node2 Got invalid submesh handle\n");
272 send_event(ERR_NETWORK);
275 submesh = meshlink_get_submesh(mesh, "app2");
277 if(submesh != NULL) {
278 fprintf(stderr, "\tapp1node2 Submesh handle should be NULL\n");
279 send_event(ERR_NETWORK);
282 send_event(MESH_EVENT_COMPLETED);
284 // All test steps executed - wait for signals to stop/start or close the mesh
286 while(test_running) {
287 select(1, NULL, NULL, NULL, &main_loop_wait);
290 meshlink_close(mesh);