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Add the blackbox channel connection tests.
[meshlink] / test / blackbox / test_case_channel_conn_02 / node_sim_nut.c
1 /*
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>
6
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.
11
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.
16
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.
20 */
21
22 #include <stdio.h>
23 #include <stdlib.h>
24 #include <string.h>
25 #include <pthread.h>
26 #include <assert.h>
27 #include <signal.h>
28 #include "../common/common_handlers.h"
29 #include "../common/test_step.h"
30 #include "../common/mesh_event_handler.h"
31 #include "../../utils.h"
32
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
39
40 static int client_id = -1;
41
42 static struct sync_flag peer_reachable = {.mutex  = PTHREAD_MUTEX_INITIALIZER, .cond = PTHREAD_COND_INITIALIZER};
43 static struct sync_flag channel_opened = {.mutex  = PTHREAD_MUTEX_INITIALIZER, .cond = PTHREAD_COND_INITIALIZER};
44 static struct sync_flag channel_closed = {.mutex  = PTHREAD_MUTEX_INITIALIZER, .cond = PTHREAD_COND_INITIALIZER};
45 static struct sync_flag sigusr_received = {.mutex  = PTHREAD_MUTEX_INITIALIZER, .cond = PTHREAD_COND_INITIALIZER};
46
47 static void send_event(mesh_event_t event);
48 static void node_status_cb(meshlink_handle_t *mesh, meshlink_node_t *node,
49                            bool reachable);
50 static void mesh_siguser1_signal_handler(int sig_num);
51
52 static void mesh_siguser1_signal_handler(int sig_num) {
53         set_sync_flag(&sigusr_received, true);
54         return;
55 }
56
57 static void send_event(mesh_event_t event) {
58         bool send_ret = false;
59         int attempts;
60
61         for(attempts = 0; attempts < 5; attempts += 1) {
62                 send_ret = mesh_event_sock_send(client_id, event, NULL, 0);
63
64                 if(send_ret) {
65                         break;
66                 }
67         }
68
69         return;
70 }
71
72 static void node_status_cb(meshlink_handle_t *mesh, meshlink_node_t *node,
73                            bool reachable) {
74         if(!strcasecmp(node->name, "peer") && reachable) {
75                 set_sync_flag(&peer_reachable, true);
76         }
77
78         return;
79 }
80
81 static void poll_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, size_t len) {
82         (void)len;
83         meshlink_set_channel_poll_cb(mesh, channel, NULL);
84         assert(meshlink_channel_send(mesh, channel, "test", 5) >= 0);
85         return;
86 }
87
88 static void channel_receive_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *dat, size_t len) {
89         if(len == 0) {
90                 set_sync_flag(&channel_closed, true);
91                 send_event(ERR_NETWORK);
92                 return;
93         }
94
95         if(!strcmp(channel->node->name, "peer")) {
96                 if(len == 5 && !memcmp(dat, "reply", 5)) {
97                         set_sync_flag(&channel_opened, true);
98                 }
99         }
100
101         return;
102 }
103
104 int main(int argc, char *argv[]) {
105         struct timeval main_loop_wait = { 2, 0 };
106         struct timespec timeout = {0};
107         int i;
108
109         // Import mesh event handler
110
111         if((argv[CMD_LINE_ARG_CLIENTID]) && (argv[CMD_LINE_ARG_IMPORTSTR])) {
112                 client_id = atoi(argv[CMD_LINE_ARG_CLIENTID]);
113                 mesh_event_sock_connect(argv[CMD_LINE_ARG_IMPORTSTR]);
114         }
115
116         // Setup required signals
117
118         setup_signals();
119         signal(SIGUSR1, mesh_siguser1_signal_handler);
120
121         // Execute test steps
122
123         meshlink_handle_t *mesh = meshlink_open("testconf", argv[CMD_LINE_ARG_NODENAME],
124                                                 "test_channel_conn", atoi(argv[CMD_LINE_ARG_DEVCLASS]));
125         assert(mesh);
126         meshlink_set_log_cb(mesh, MESHLINK_DEBUG, meshlink_callback_logger);
127         meshlink_set_node_status_cb(mesh, node_status_cb);
128
129         if(argv[CMD_LINE_ARG_INVITEURL]) {
130                 assert(meshlink_join(mesh, argv[CMD_LINE_ARG_INVITEURL]));
131         }
132
133         assert(meshlink_start(mesh));
134
135         // Wait for peer node to join
136
137         assert(wait_sync_flag(&peer_reachable, 30));
138         send_event(NODE_JOINED);
139
140         // Open a channel to peer node
141
142         meshlink_node_t *peer_node = meshlink_get_node(mesh, "peer");
143         assert(peer_node);
144         meshlink_channel_t *channel = meshlink_channel_open(mesh, peer_node, CHANNEL_PORT,
145                                       channel_receive_cb, NULL, 0);
146         meshlink_set_channel_poll_cb(mesh, channel, poll_cb);
147
148         assert(wait_sync_flag(&channel_opened, 10));
149         send_event(CHANNEL_OPENED);
150
151         assert(wait_sync_flag(&sigusr_received, 10));
152
153         assert(meshlink_channel_send(mesh, channel, "after", 6) >= 0);
154
155         assert(wait_sync_flag(&channel_closed, 180));
156
157         // All test steps executed - wait for signals to stop/start or close the mesh
158         while(test_running) {
159                 select(1, NULL, NULL, NULL, &main_loop_wait);
160         }
161
162         meshlink_close(mesh);
163 }