/*
* interface-declaration :==
* INTERFACE string LBRACE client-declarations RBRACE
*/
void
parse_interface_declaration(FILE *cfile, struct client_config *outer_config)
{
int token;
char *val;
struct interface_info *ip;
token = next_token(&val, cfile);
if (token != STRING) {
parse_warn("expecting interface name (in quotes).");
skip_to_semi(cfile);
return;
}
ip = interface_or_dummy(val);
if (!ip->client)
make_client_state(ip);
if (!ip->client->config)
make_client_config(ip, outer_config);
token = next_token(&val, cfile);
if (token != LBRACE) {
parse_warn("expecting left brace.");
skip_to_semi(cfile);
return;
}
do {
token = peek_token(&val, cfile);
if (token == EOF) {
parse_warn("unterminated interface declaration.");
return;
}
if (token == RBRACE)
break;
parse_client_statement(cfile, ip, ip->client->config);
} while (1);
token = next_token(&val, cfile);
}
/****************************************************************************
* Public Functions
****************************************************************************/
int mqtt_client_sub_task(void *arg)
{
int result = -1;
int ret = 0;
int argc;
char **argv;
argc = ((struct mqtt_sub_input *)arg)->argc;
argv = ((struct mqtt_sub_input *)arg)->argv;
if (argc == 1) {
print_usage();
return 0;
}
/* set the seed of a new sequence of random values */
mqtt_set_srand();
/* check options and set variables */
init_variables();
ret = process_options(argc, argv);
if (ret != 0) {
if (ret == 2) {
print_usage();
result = 0;
}
goto done;
}
/* check and do options when a client is running */
ret = check_option_on_client_running();
if (ret == CHECK_OPTION_RESULT_CHECKED_OK) {
result = 0;
goto done;
} else if (ret == CHECK_OPTION_RESULT_CHECKED_ERROR) {
goto done;
}
/* make mqtt subscriber client config */
if (make_client_config() != 0) {
goto done;
}
/* create mqtt subscriber client */
if (g_debug) {
printf("initialize MQTT client context.\n");
}
g_mqtt_client_handle = mqtt_init_client(&g_mqtt_client_config);
if (g_mqtt_client_handle == NULL) {
fprintf(stderr, "Error: mqtt_init_client() failed.\n");
clean_client_config();
goto done;
}
/* connect to a mqtt broker */
if (g_debug) {
printf("connect to a MQTT broker (%s : %d).\n", g_host_addr, g_port);
}
if (mqtt_connect(g_mqtt_client_handle, g_host_addr, g_port, g_keepalive) != 0) {
fprintf(stderr, "Error: mqtt_connect() failed.\n");
if (mqtt_deinit_client(g_mqtt_client_handle) != 0) {
fprintf(stderr, "Error: mqtt_deinit_client() failed.\n");
} else {
g_mqtt_client_handle = NULL;
}
clean_client_config();
goto done;
}
if (g_debug) {
printf("MQTT subscriber has started successfully.\n");
}
/* result is success */
result = 0;
done:
deinit_variables();
return result;
}