9 #include <sys/socket.h>
11 #include <asm/byteorder.h>
13 #include <pb-config/pb-config.h>
14 #include <talloc/talloc.h>
15 #include <waiter/waiter.h>
18 #include "pb-protocol/pb-protocol.h"
19 #include "list/list.h"
21 #include "device-handler.h"
22 #include "discover-server.h"
26 struct discover_server {
28 struct waitset *waitset;
29 struct waiter *waiter;
32 struct device_handler *device_handler;
36 struct discover_server *server;
37 struct list_item list;
38 struct waiter *waiter;
44 static int server_destructor(void *arg)
46 struct discover_server *server = arg;
49 waiter_remove(server->waiter);
51 if (server->socket >= 0)
52 close(server->socket);
57 static int client_destructor(void *arg)
59 struct client *client = arg;
65 waiter_remove(client->waiter);
67 list_remove(&client->list);
73 static void print_clients(struct discover_server *server)
74 __attribute__((unused));
76 static void print_clients(struct discover_server *server)
78 struct client *client;
80 pb_debug("current clients [%p,%p,%p]:\n",
81 &server->clients.head,
82 server->clients.head.prev,
83 server->clients.head.next);
84 list_for_each_entry(&server->clients, client, list)
85 pb_debug("\t[%p,%p,%p] client: %d\n", &client->list,
86 client->list.prev, client->list.next,
90 static int client_write_message(
91 struct discover_server *server __attribute__((unused)),
92 struct client *client, struct pb_protocol_message *message)
96 if (client->remote_closed)
99 rc = pb_protocol_write_message(client->fd, message);
101 client->remote_closed = true;
106 static int write_device_add_message(struct discover_server *server,
107 struct client *client, const struct device *dev)
109 struct pb_protocol_message *message;
112 len = pb_protocol_device_len(dev);
114 message = pb_protocol_create_message(client,
115 PB_PROTOCOL_ACTION_DEVICE_ADD, len);
119 pb_protocol_serialise_device(dev, message->payload, len);
121 return client_write_message(server, client, message);
124 static int write_boot_option_add_message(struct discover_server *server,
125 struct client *client, const struct boot_option *opt)
127 struct pb_protocol_message *message;
130 len = pb_protocol_boot_option_len(opt);
132 message = pb_protocol_create_message(client,
133 PB_PROTOCOL_ACTION_BOOT_OPTION_ADD, len);
137 pb_protocol_serialise_boot_option(opt, message->payload, len);
139 return client_write_message(server, client, message);
142 static int write_plugin_option_add_message(struct discover_server *server,
143 struct client *client, const struct plugin_option *opt)
145 struct pb_protocol_message *message;
148 len = pb_protocol_plugin_option_len(opt);
150 message = pb_protocol_create_message(client,
151 PB_PROTOCOL_ACTION_PLUGIN_OPTION_ADD, len);
155 pb_protocol_serialise_plugin_option(opt, message->payload, len);
157 return client_write_message(server, client, message);
160 static int write_plugins_remove_message(struct discover_server *server,
161 struct client *client)
163 struct pb_protocol_message *message;
165 message = pb_protocol_create_message(client,
166 PB_PROTOCOL_ACTION_PLUGINS_REMOVE, 0);
170 /* No payload so nothing to serialise */
172 return client_write_message(server, client, message);
175 static int write_device_remove_message(struct discover_server *server,
176 struct client *client, char *dev_id)
178 struct pb_protocol_message *message;
181 len = strlen(dev_id) + sizeof(uint32_t);
183 message = pb_protocol_create_message(client,
184 PB_PROTOCOL_ACTION_DEVICE_REMOVE, len);
188 pb_protocol_serialise_string(message->payload, dev_id);
190 return client_write_message(server, client, message);
193 static int write_boot_status_message(struct discover_server *server,
194 struct client *client, const struct status *status)
196 struct pb_protocol_message *message;
199 len = pb_protocol_boot_status_len(status);
201 message = pb_protocol_create_message(client,
202 PB_PROTOCOL_ACTION_STATUS, len);
206 pb_protocol_serialise_boot_status(status, message->payload, len);
208 return client_write_message(server, client, message);
211 static int write_system_info_message(struct discover_server *server,
212 struct client *client, const struct system_info *sysinfo)
214 struct pb_protocol_message *message;
217 len = pb_protocol_system_info_len(sysinfo);
219 message = pb_protocol_create_message(client,
220 PB_PROTOCOL_ACTION_SYSTEM_INFO, len);
224 pb_protocol_serialise_system_info(sysinfo, message->payload, len);
226 return client_write_message(server, client, message);
229 static int write_config_message(struct discover_server *server,
230 struct client *client, const struct config *config)
232 struct pb_protocol_message *message;
235 len = pb_protocol_config_len(config);
237 message = pb_protocol_create_message(client,
238 PB_PROTOCOL_ACTION_CONFIG, len);
242 pb_protocol_serialise_config(config, message->payload, len);
244 return client_write_message(server, client, message);
247 static int discover_server_process_message(void *arg)
249 struct pb_protocol_message *message;
250 struct boot_command *boot_command;
251 struct client *client = arg;
252 struct config *config;
256 message = pb_protocol_read_message(client, client->fd);
264 switch (message->action) {
265 case PB_PROTOCOL_ACTION_BOOT:
266 boot_command = talloc(client, struct boot_command);
268 rc = pb_protocol_deserialise_boot_command(boot_command,
271 pb_log("%s: no boot command?", __func__);
275 device_handler_boot(client->server->device_handler,
279 case PB_PROTOCOL_ACTION_CANCEL_DEFAULT:
280 device_handler_cancel_default(client->server->device_handler);
283 case PB_PROTOCOL_ACTION_REINIT:
284 device_handler_reinit(client->server->device_handler);
287 case PB_PROTOCOL_ACTION_CONFIG:
288 config = talloc_zero(client, struct config);
290 rc = pb_protocol_deserialise_config(config, message);
292 pb_log("%s: no config?", __func__);
296 device_handler_update_config(client->server->device_handler,
300 case PB_PROTOCOL_ACTION_ADD_URL:
301 url = pb_protocol_deserialise_string((void *) client, message);
303 device_handler_process_url(client->server->device_handler,
307 case PB_PROTOCOL_ACTION_PLUGIN_INSTALL:
308 url = pb_protocol_deserialise_string((void *) client, message);
310 device_handler_install_plugin(client->server->device_handler,
314 pb_log("%s: invalid action %d\n", __func__, message->action);
322 static int discover_server_process_connection(void *arg)
324 struct discover_server *server = arg;
325 struct statuslog_entry *entry;
326 int fd, rc, i, n_devices, n_plugins;
327 struct client *client;
329 /* accept the incoming connection */
330 fd = accept(server->socket, NULL, NULL);
332 pb_log("accept: %s\n", strerror(errno));
336 /* add to our list of clients */
337 client = talloc_zero(server, struct client);
338 list_add(&server->clients, &client->list);
340 talloc_set_destructor(client, client_destructor);
343 client->server = server;
344 client->waiter = waiter_register_io(server->waitset, client->fd,
345 WAIT_IN, discover_server_process_message,
348 /* send sysinfo to client */
349 rc = write_system_info_message(server, client, system_info_get());
353 /* send config to client */
354 rc = write_config_message(server, client, config_get());
358 /* send existing devices to client */
359 n_devices = device_handler_get_device_count(server->device_handler);
360 for (i = 0; i < n_devices; i++) {
361 const struct discover_boot_option *opt;
362 const struct discover_device *device;
364 device = device_handler_get_device(server->device_handler, i);
365 rc = write_device_add_message(server, client, device->device);
369 list_for_each_entry(&device->boot_options, opt, list) {
370 rc = write_boot_option_add_message(server, client,
377 /* send status backlog to client */
378 list_for_each_entry(&server->status, entry, list)
379 write_boot_status_message(server, client, entry->status);
381 /* send installed plugins to client */
382 n_plugins = device_handler_get_plugin_count(server->device_handler);
383 for (i = 0; i < n_plugins; i++) {
384 const struct plugin_option *plugin;
386 plugin = device_handler_get_plugin(server->device_handler, i);
387 write_plugin_option_add_message(server, client, plugin);
393 void discover_server_notify_device_add(struct discover_server *server,
394 struct device *device)
396 struct client *client;
398 list_for_each_entry(&server->clients, client, list)
399 write_device_add_message(server, client, device);
403 void discover_server_notify_boot_option_add(struct discover_server *server,
404 struct boot_option *boot_option)
406 struct client *client;
408 list_for_each_entry(&server->clients, client, list)
409 write_boot_option_add_message(server, client, boot_option);
412 void discover_server_notify_device_remove(struct discover_server *server,
413 struct device *device)
415 struct client *client;
417 list_for_each_entry(&server->clients, client, list)
418 write_device_remove_message(server, client, device->id);
422 void discover_server_notify_boot_status(struct discover_server *server,
423 struct status *status)
425 struct statuslog_entry *entry;
426 struct client *client;
428 /* Duplicate the status struct to add to the backlog */
429 entry = talloc(server, struct statuslog_entry);
431 pb_log("Failed to allocated saved status!\n");
433 entry->status = talloc(entry, struct status);
435 entry->status->type = status->type;
436 entry->status->message = talloc_strdup(entry->status,
438 entry->status->backlog = true;
439 list_add_tail(&server->status, &entry->list);
445 list_for_each_entry(&server->clients, client, list)
446 write_boot_status_message(server, client, status);
449 void discover_server_notify_system_info(struct discover_server *server,
450 const struct system_info *sysinfo)
452 struct client *client;
454 list_for_each_entry(&server->clients, client, list)
455 write_system_info_message(server, client, sysinfo);
458 void discover_server_notify_config(struct discover_server *server,
459 const struct config *config)
461 struct client *client;
463 list_for_each_entry(&server->clients, client, list)
464 write_config_message(server, client, config);
467 void discover_server_notify_plugin_option_add(struct discover_server *server,
468 struct plugin_option *opt)
470 struct client *client;
472 list_for_each_entry(&server->clients, client, list)
473 write_plugin_option_add_message(server, client, opt);
476 void discover_server_notify_plugins_remove(struct discover_server *server)
478 struct client *client;
480 list_for_each_entry(&server->clients, client, list)
481 write_plugins_remove_message(server, client);
484 void discover_server_set_device_source(struct discover_server *server,
485 struct device_handler *handler)
487 server->device_handler = handler;
490 struct discover_server *discover_server_init(struct waitset *waitset)
492 struct discover_server *server;
493 struct sockaddr_un addr;
495 server = talloc(NULL, struct discover_server);
499 server->waiter = NULL;
500 server->waitset = waitset;
501 list_init(&server->clients);
502 list_init(&server->status);
504 unlink(PB_SOCKET_PATH);
506 server->socket = socket(AF_UNIX, SOCK_STREAM, 0);
507 if (server->socket < 0) {
508 pb_log("error creating server socket: %s\n", strerror(errno));
512 talloc_set_destructor(server, server_destructor);
514 addr.sun_family = AF_UNIX;
515 strcpy(addr.sun_path, PB_SOCKET_PATH);
517 if (bind(server->socket, (struct sockaddr *)&addr, sizeof(addr))) {
518 pb_log("error binding server socket: %s\n", strerror(errno));
522 if (listen(server->socket, 8)) {
523 pb_log("server socket listen: %s\n", strerror(errno));
527 server->waiter = waiter_register_io(server->waitset, server->socket,
528 WAIT_IN, discover_server_process_connection, server);
537 void discover_server_destroy(struct discover_server *server)