10 #include <sys/socket.h>
12 #include <asm/byteorder.h>
14 #include <pb-config/pb-config.h>
15 #include <talloc/talloc.h>
16 #include <waiter/waiter.h>
19 #include "pb-protocol/pb-protocol.h"
20 #include "list/list.h"
22 #include "device-handler.h"
23 #include "discover-server.h"
27 struct discover_server {
29 struct waitset *waitset;
30 struct waiter *waiter;
33 struct device_handler *device_handler;
37 struct discover_server *server;
38 struct list_item list;
39 struct waiter *waiter;
45 static int server_destructor(void *arg)
47 struct discover_server *server = arg;
50 waiter_remove(server->waiter);
52 if (server->socket >= 0)
53 close(server->socket);
58 static int client_destructor(void *arg)
60 struct client *client = arg;
66 waiter_remove(client->waiter);
68 list_remove(&client->list);
74 static void print_clients(struct discover_server *server)
75 __attribute__((unused));
77 static void print_clients(struct discover_server *server)
79 struct client *client;
81 pb_debug("current clients [%p,%p,%p]:\n",
82 &server->clients.head,
83 server->clients.head.prev,
84 server->clients.head.next);
85 list_for_each_entry(&server->clients, client, list)
86 pb_debug("\t[%p,%p,%p] client: %d\n", &client->list,
87 client->list.prev, client->list.next,
91 static int client_write_message(
92 struct discover_server *server __attribute__((unused)),
93 struct client *client, struct pb_protocol_message *message)
97 if (client->remote_closed)
100 rc = pb_protocol_write_message(client->fd, message);
102 client->remote_closed = true;
107 static int write_device_add_message(struct discover_server *server,
108 struct client *client, const struct device *dev)
110 struct pb_protocol_message *message;
113 len = pb_protocol_device_len(dev);
115 message = pb_protocol_create_message(client,
116 PB_PROTOCOL_ACTION_DEVICE_ADD, len);
120 pb_protocol_serialise_device(dev, message->payload, len);
122 return client_write_message(server, client, message);
125 static int write_boot_option_add_message(struct discover_server *server,
126 struct client *client, const struct boot_option *opt)
128 struct pb_protocol_message *message;
131 len = pb_protocol_boot_option_len(opt);
133 message = pb_protocol_create_message(client,
134 PB_PROTOCOL_ACTION_BOOT_OPTION_ADD, len);
138 pb_protocol_serialise_boot_option(opt, message->payload, len);
140 return client_write_message(server, client, message);
143 static int write_plugin_option_add_message(struct discover_server *server,
144 struct client *client, const struct plugin_option *opt)
146 struct pb_protocol_message *message;
149 len = pb_protocol_plugin_option_len(opt);
151 message = pb_protocol_create_message(client,
152 PB_PROTOCOL_ACTION_PLUGIN_OPTION_ADD, len);
156 pb_protocol_serialise_plugin_option(opt, message->payload, len);
158 return client_write_message(server, client, message);
161 static int write_plugins_remove_message(struct discover_server *server,
162 struct client *client)
164 struct pb_protocol_message *message;
166 message = pb_protocol_create_message(client,
167 PB_PROTOCOL_ACTION_PLUGINS_REMOVE, 0);
171 /* No payload so nothing to serialise */
173 return client_write_message(server, client, message);
176 static int write_device_remove_message(struct discover_server *server,
177 struct client *client, char *dev_id)
179 struct pb_protocol_message *message;
182 len = strlen(dev_id) + sizeof(uint32_t);
184 message = pb_protocol_create_message(client,
185 PB_PROTOCOL_ACTION_DEVICE_REMOVE, len);
189 pb_protocol_serialise_string(message->payload, dev_id);
191 return client_write_message(server, client, message);
194 static int write_boot_status_message(struct discover_server *server,
195 struct client *client, const struct status *status)
197 struct pb_protocol_message *message;
200 len = pb_protocol_boot_status_len(status);
202 message = pb_protocol_create_message(client,
203 PB_PROTOCOL_ACTION_STATUS, len);
207 pb_protocol_serialise_boot_status(status, message->payload, len);
209 return client_write_message(server, client, message);
212 static int write_system_info_message(struct discover_server *server,
213 struct client *client, const struct system_info *sysinfo)
215 struct pb_protocol_message *message;
218 len = pb_protocol_system_info_len(sysinfo);
220 message = pb_protocol_create_message(client,
221 PB_PROTOCOL_ACTION_SYSTEM_INFO, len);
225 pb_protocol_serialise_system_info(sysinfo, message->payload, len);
227 return client_write_message(server, client, message);
230 static int write_config_message(struct discover_server *server,
231 struct client *client, const struct config *config)
233 struct pb_protocol_message *message;
236 len = pb_protocol_config_len(config);
238 message = pb_protocol_create_message(client,
239 PB_PROTOCOL_ACTION_CONFIG, len);
243 pb_protocol_serialise_config(config, message->payload, len);
245 return client_write_message(server, client, message);
248 static int discover_server_process_message(void *arg)
250 struct pb_protocol_message *message;
251 struct boot_command *boot_command;
252 struct client *client = arg;
253 struct config *config;
257 message = pb_protocol_read_message(client, client->fd);
265 switch (message->action) {
266 case PB_PROTOCOL_ACTION_BOOT:
267 boot_command = talloc(client, struct boot_command);
269 rc = pb_protocol_deserialise_boot_command(boot_command,
272 pb_log("%s: no boot command?", __func__);
276 device_handler_boot(client->server->device_handler,
280 case PB_PROTOCOL_ACTION_CANCEL_DEFAULT:
281 device_handler_cancel_default(client->server->device_handler);
284 case PB_PROTOCOL_ACTION_REINIT:
285 device_handler_reinit(client->server->device_handler);
288 case PB_PROTOCOL_ACTION_CONFIG:
289 config = talloc_zero(client, struct config);
291 rc = pb_protocol_deserialise_config(config, message);
293 pb_log("%s: no config?", __func__);
297 device_handler_update_config(client->server->device_handler,
301 case PB_PROTOCOL_ACTION_ADD_URL:
302 url = pb_protocol_deserialise_string((void *) client, message);
304 device_handler_process_url(client->server->device_handler,
308 case PB_PROTOCOL_ACTION_PLUGIN_INSTALL:
309 url = pb_protocol_deserialise_string((void *) client, message);
311 device_handler_install_plugin(client->server->device_handler,
315 pb_log("%s: invalid action %d\n", __func__, message->action);
323 static int discover_server_process_connection(void *arg)
325 struct discover_server *server = arg;
326 struct statuslog_entry *entry;
327 int fd, rc, i, n_devices, n_plugins;
328 struct client *client;
330 /* accept the incoming connection */
331 fd = accept(server->socket, NULL, NULL);
333 pb_log("accept: %s\n", strerror(errno));
337 /* add to our list of clients */
338 client = talloc_zero(server, struct client);
339 list_add(&server->clients, &client->list);
341 talloc_set_destructor(client, client_destructor);
344 client->server = server;
345 client->waiter = waiter_register_io(server->waitset, client->fd,
346 WAIT_IN, discover_server_process_message,
349 /* send sysinfo to client */
350 rc = write_system_info_message(server, client, system_info_get());
354 /* send config to client */
355 rc = write_config_message(server, client, config_get());
359 /* send existing devices to client */
360 n_devices = device_handler_get_device_count(server->device_handler);
361 for (i = 0; i < n_devices; i++) {
362 const struct discover_boot_option *opt;
363 const struct discover_device *device;
365 device = device_handler_get_device(server->device_handler, i);
366 rc = write_device_add_message(server, client, device->device);
370 list_for_each_entry(&device->boot_options, opt, list) {
371 rc = write_boot_option_add_message(server, client,
378 /* send status backlog to client */
379 list_for_each_entry(&server->status, entry, list)
380 write_boot_status_message(server, client, entry->status);
382 /* send installed plugins to client */
383 n_plugins = device_handler_get_plugin_count(server->device_handler);
384 for (i = 0; i < n_plugins; i++) {
385 const struct plugin_option *plugin;
387 plugin = device_handler_get_plugin(server->device_handler, i);
388 write_plugin_option_add_message(server, client, plugin);
394 void discover_server_notify_device_add(struct discover_server *server,
395 struct device *device)
397 struct client *client;
399 list_for_each_entry(&server->clients, client, list)
400 write_device_add_message(server, client, device);
404 void discover_server_notify_boot_option_add(struct discover_server *server,
405 struct boot_option *boot_option)
407 struct client *client;
409 list_for_each_entry(&server->clients, client, list)
410 write_boot_option_add_message(server, client, boot_option);
413 void discover_server_notify_device_remove(struct discover_server *server,
414 struct device *device)
416 struct client *client;
418 list_for_each_entry(&server->clients, client, list)
419 write_device_remove_message(server, client, device->id);
423 void discover_server_notify_boot_status(struct discover_server *server,
424 struct status *status)
426 struct statuslog_entry *entry;
427 struct client *client;
429 /* Duplicate the status struct to add to the backlog */
430 entry = talloc(server, struct statuslog_entry);
432 pb_log("Failed to allocated saved status!\n");
434 entry->status = talloc(entry, struct status);
436 entry->status->type = status->type;
437 entry->status->message = talloc_strdup(entry->status,
439 entry->status->backlog = true;
440 list_add_tail(&server->status, &entry->list);
446 list_for_each_entry(&server->clients, client, list)
447 write_boot_status_message(server, client, status);
450 void discover_server_notify_system_info(struct discover_server *server,
451 const struct system_info *sysinfo)
453 struct client *client;
455 list_for_each_entry(&server->clients, client, list)
456 write_system_info_message(server, client, sysinfo);
459 void discover_server_notify_config(struct discover_server *server,
460 const struct config *config)
462 struct client *client;
464 list_for_each_entry(&server->clients, client, list)
465 write_config_message(server, client, config);
468 void discover_server_notify_plugin_option_add(struct discover_server *server,
469 struct plugin_option *opt)
471 struct client *client;
473 list_for_each_entry(&server->clients, client, list)
474 write_plugin_option_add_message(server, client, opt);
477 void discover_server_notify_plugins_remove(struct discover_server *server)
479 struct client *client;
481 list_for_each_entry(&server->clients, client, list)
482 write_plugins_remove_message(server, client);
485 void discover_server_set_device_source(struct discover_server *server,
486 struct device_handler *handler)
488 server->device_handler = handler;
491 struct discover_server *discover_server_init(struct waitset *waitset)
493 struct discover_server *server;
494 struct sockaddr_un addr;
496 server = talloc(NULL, struct discover_server);
500 server->waiter = NULL;
501 server->waitset = waitset;
502 list_init(&server->clients);
503 list_init(&server->status);
505 unlink(PB_SOCKET_PATH);
507 server->socket = socket(AF_UNIX, SOCK_STREAM, 0);
508 if (server->socket < 0) {
509 pb_log("error creating server socket: %s\n", strerror(errno));
513 talloc_set_destructor(server, server_destructor);
515 addr.sun_family = AF_UNIX;
516 strcpy(addr.sun_path, PB_SOCKET_PATH);
518 if (bind(server->socket, (struct sockaddr *)&addr, sizeof(addr))) {
519 pb_log("error binding server socket: %s\n", strerror(errno));
523 if (listen(server->socket, 8)) {
524 pb_log("server socket listen: %s\n", strerror(errno));
528 server->waiter = waiter_register_io(server->waitset, server->socket,
529 WAIT_IN, discover_server_process_connection, server);
538 void discover_server_destroy(struct discover_server *server)