/**@internal
* Main execution loop
*/
static void
main_loop(void)
{
int result;
pthread_t tid;
s_config *config = config_get_config();
struct timespec wait_time;
int msec;
request *r;
void **params;
int* thread_serial_num_p;
/* Set the time when nodogsplash started */
if (!started_time) {
debug(LOG_INFO, "Setting started_time");
started_time = time(NULL);
} else if (started_time < MINIMUM_STARTED_TIME) {
debug(LOG_WARNING, "Detected possible clock skew - re-setting started_time");
started_time = time(NULL);
}
/* If we don't have the Gateway IP address, get it. Exit on failure. */
if (!config->gw_address) {
debug(LOG_DEBUG, "Finding IP address of %s", config->gw_interface);
if ((config->gw_address = get_iface_ip(config->gw_interface)) == NULL) {
debug(LOG_ERR, "Could not get IP address information of %s, exiting...", config->gw_interface);
exit(1);
}
if ((config->gw_mac = get_iface_mac(config->gw_interface)) == NULL) {
debug(LOG_ERR, "Could not get MAC address information of %s, exiting...", config->gw_interface);
exit(1);
}
debug(LOG_NOTICE, "Detected gateway %s at %s (%s)", config->gw_interface, config->gw_address, config->gw_mac);
}
/* Initializes the web server */
if ((webserver = httpdCreate(config->gw_address, config->gw_port)) == NULL) {
debug(LOG_ERR, "Could not create web server: %s", strerror(errno));
exit(1);
}
debug(LOG_NOTICE, "Created web server on %s:%d", config->gw_address, config->gw_port);
/* Set web root for server */
debug(LOG_DEBUG, "Setting web root: %s",config->webroot);
httpdSetFileBase(webserver,config->webroot);
/* Add images files to server: any file in config->imagesdir can be served */
debug(LOG_DEBUG, "Setting images subdir: %s",config->imagesdir);
httpdAddWildcardContent(webserver,config->imagesdir,NULL,config->imagesdir);
/* Add pages files to server: any file in config->pagesdir can be served */
debug(LOG_DEBUG, "Setting pages subdir: %s",config->pagesdir);
httpdAddWildcardContent(webserver,config->pagesdir,NULL,config->pagesdir);
debug(LOG_DEBUG, "Registering callbacks to web server");
httpdAddCContent(webserver, "/", "", 0, NULL, http_nodogsplash_callback_index);
httpdAddCWildcardContent(webserver, config->authdir, NULL, http_nodogsplash_callback_auth);
httpdAddCWildcardContent(webserver, config->denydir, NULL, http_nodogsplash_callback_deny);
httpdAddC404Content(webserver, http_nodogsplash_callback_404);
/* Reset the firewall (cleans it, in case we are restarting after nodogsplash crash) */
fw_destroy();
/* Then initialize it */
debug(LOG_NOTICE, "Initializing firewall rules");
if( fw_init() != 0 ) {
debug(LOG_ERR, "Error initializing firewall rules! Cleaning up");
fw_destroy();
debug(LOG_ERR, "Exiting because of error initializing firewall rules");
exit(1);
}
/* Start client statistics and timeout clean-up thread */
result = pthread_create(&tid_client_check, NULL, (void *)thread_client_timeout_check, NULL);
if (result != 0) {
debug(LOG_ERR, "FATAL: Failed to create thread_client_timeout_check - exiting");
termination_handler(0);
}
pthread_detach(tid_client_check);
/* Start control thread */
result = pthread_create(&tid, NULL, (void *)thread_ndsctl, (void *)safe_strdup(config->ndsctl_sock));
if (result != 0) {
debug(LOG_ERR, "FATAL: Failed to create thread_ndsctl - exiting");
termination_handler(0);
}
pthread_detach(tid);
/*
* Enter the httpd request handling loop
*/
debug(LOG_NOTICE, "Waiting for connections");
while(1) {
r = httpdGetConnection(webserver, NULL);
/* We can't convert this to a switch because there might be
* values that are not -1, 0 or 1. */
if (webserver->lastError == -1) {
/* Interrupted system call */
continue; /* continue loop from the top */
} else if (webserver->lastError < -1) {
/*
* FIXME
* An error occurred - should we abort?
* reboot the device ?
*/
debug(LOG_ERR, "FATAL: httpdGetConnection returned unexpected value %d, exiting.", webserver->lastError);
termination_handler(0);
} else if (r != NULL) {
/* We got a connection */
handle_http_request(webserver, r);
} else {
/* webserver->lastError should be 2 */
/* XXX We failed an ACL.... No handling because
* we don't set any... */
}
}
/* never reached */
}
/**@internal
* Main execution loop
*/
static void
main_loop(void) {
int result;
pthread_t tid;
s_config *config = config_get_config();
struct timespec wait_time;
int msec;
request *r;
void **params;
FILE *fh;
int* thread_serial_num_p;
/* Set the time when nodogsplash started */
if (!started_time) {
debug(LOG_INFO, "Setting started_time");
started_time = time(NULL);
}
else if (started_time < MINIMUM_STARTED_TIME) {
debug(LOG_WARNING, "Detected possible clock skew - re-setting started_time");
started_time = time(NULL);
}
/* If we don't have the Gateway IP address, get it. Exit on failure. */
if (!config->gw_address) {
debug(LOG_DEBUG, "Finding IP address of %s", config->gw_interface);
if ((config->gw_address = get_iface_ip(config->gw_interface)) == NULL) {
debug(LOG_ERR, "Could not get IP address information of %s, exiting...", config->gw_interface);
exit(1);
}
debug(LOG_NOTICE, "Detected gateway %s at %s", config->gw_interface, config->gw_address);
}
/* Initializes the web server */
if ((webserver = httpdCreate(config->gw_address, config->gw_port)) == NULL) {
debug(LOG_ERR, "Could not create web server: %s", strerror(errno));
exit(1);
}
debug(LOG_NOTICE, "Created web server on %s:%d", config->gw_address, config->gw_port);
/* Set web root for server */
debug(LOG_DEBUG, "Setting web root: %s",config->webroot);
httpdSetFileBase(webserver,config->webroot);
/* Add images files to server: any file in config->imagesdir can be served */
debug(LOG_DEBUG, "Setting images subdir: %s",config->imagesdir);
httpdAddWildcardContent(webserver,config->imagesdir,NULL,config->imagesdir);
/* Add pages files to server: any file in config->pagesdir can be served */
debug(LOG_DEBUG, "Setting pages subdir: %s",config->pagesdir);
httpdAddWildcardContent(webserver,config->pagesdir,NULL,config->pagesdir);
debug(LOG_DEBUG, "Registering callbacks to web server");
httpdAddCContent(webserver, "/", "", 0, NULL, http_nodogsplash_callback_index);
httpdAddCWildcardContent(webserver, config->authdir, NULL, http_nodogsplash_callback_auth);
httpdAddCWildcardContent(webserver, config->denydir, NULL, http_nodogsplash_callback_deny);
httpdAddC404Content(webserver, http_nodogsplash_callback_404);
/* Reset the firewall (cleans it, in case we are restarting after nodogsplash crash) */
fw_destroy();
/* Then initialize it */
debug(LOG_NOTICE, "Initializing firewall rules");
if( fw_init() != 0 ) {
debug(LOG_ERR, "Error initializing firewall rules! Cleaning up");
fw_destroy();
debug(LOG_ERR, "Exiting because of error initializing firewall rules");
exit(1);
}
/* Start client statistics and timeout clean-up thread */
result = pthread_create(&tid_client_check, NULL, (void *)thread_client_timeout_check, NULL);
if (result != 0) {
debug(LOG_ERR, "FATAL: Failed to create thread_client_timeout_check - exiting");
termination_handler(0);
}
pthread_detach(tid_client_check);
/* Start control thread */
result = pthread_create(&tid, NULL, (void *)thread_ndsctl, (void *)safe_strdup(config->ndsctl_sock));
if (result != 0) {
debug(LOG_ERR, "FATAL: Failed to create thread_ndsctl - exiting");
termination_handler(0);
}
pthread_detach(tid);
/*
* Enter the httpd request handling loop
*/
debug(LOG_NOTICE, "Waiting for connections");
created_httpd_threads = 0;
current_httpd_threads = 0;
while(1) {
r = httpdGetConnection(webserver, NULL);
/* We can't convert this to a switch because there might be
* values that are not -1, 0 or 1. */
if (webserver->lastError == -1) {
/* Interrupted system call */
continue; /* continue loop from the top */
}
else if (webserver->lastError < -1) {
/*
* FIXME
* An error occurred - should we abort?
* reboot the device ?
*/
debug(LOG_ERR, "FATAL: httpdGetConnection returned unexpected value %d, exiting.", webserver->lastError);
termination_handler(0);
}
else if (r != NULL) {
/*
* We got a connection
*
* We create another thread to handle the request,
* possibly sleeping first if there are too many already
*/
debug(LOG_DEBUG,"%d current httpd threads.", current_httpd_threads);
if(config->decongest_httpd_threads && current_httpd_threads >= config->httpd_thread_threshold) {
msec = current_httpd_threads * config->httpd_thread_delay_ms;
wait_time.tv_sec = msec / 1000;
wait_time.tv_nsec = (msec % 1000) * 1000000;
debug(LOG_INFO, "Httpd thread creation delayed %ld sec %ld nanosec for congestion.",
wait_time.tv_sec, wait_time.tv_nsec);
nanosleep(&wait_time,NULL);
}
thread_serial_num_p = (int*) malloc(sizeof(int)); /* thread_httpd() must free */
*thread_serial_num_p = created_httpd_threads;
debug(LOG_INFO, "Creating httpd request thread %d for %s", *thread_serial_num_p, r->clientAddr);
/* The void**'s are a simulation of the normal C
* function calling sequence. */
params = safe_malloc(3 * sizeof(void *)); /* thread_httpd() must free */
*params = webserver;
*(params + 1) = r;
*(params + 2) = thread_serial_num_p;
created_httpd_threads++;
result = pthread_create(&tid, NULL, (void *)thread_httpd, (void *)params);
if (result != 0) {
debug(LOG_ERR, "FATAL: pthread_create failed to create httpd request thread - exiting...");
termination_handler(0);
}
pthread_detach(tid);
}
else {
/* webserver->lastError should be 2 */
/* XXX We failed an ACL.... No handling because
* we don't set any... */
}
}
/* never reached */
}