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_device_remove_message(struct discover_server *server,
143 struct client *client, char *dev_id)
145 struct pb_protocol_message *message;
148 len = strlen(dev_id) + sizeof(uint32_t);
150 message = pb_protocol_create_message(client,
151 PB_PROTOCOL_ACTION_DEVICE_REMOVE, len);
155 pb_protocol_serialise_string(message->payload, dev_id);
157 return client_write_message(server, client, message);
160 static int write_boot_status_message(struct discover_server *server,
161 struct client *client, const struct status *status)
163 struct pb_protocol_message *message;
166 len = pb_protocol_boot_status_len(status);
168 message = pb_protocol_create_message(client,
169 PB_PROTOCOL_ACTION_STATUS, len);
173 pb_protocol_serialise_boot_status(status, message->payload, len);
175 return client_write_message(server, client, message);
178 static int write_system_info_message(struct discover_server *server,
179 struct client *client, const struct system_info *sysinfo)
181 struct pb_protocol_message *message;
184 len = pb_protocol_system_info_len(sysinfo);
186 message = pb_protocol_create_message(client,
187 PB_PROTOCOL_ACTION_SYSTEM_INFO, len);
191 pb_protocol_serialise_system_info(sysinfo, message->payload, len);
193 return client_write_message(server, client, message);
196 static int write_config_message(struct discover_server *server,
197 struct client *client, const struct config *config)
199 struct pb_protocol_message *message;
202 len = pb_protocol_config_len(config);
204 message = pb_protocol_create_message(client,
205 PB_PROTOCOL_ACTION_CONFIG, len);
209 pb_protocol_serialise_config(config, message->payload, len);
211 return client_write_message(server, client, message);
214 static int discover_server_process_message(void *arg)
216 struct pb_protocol_message *message;
217 struct boot_command *boot_command;
218 struct client *client = arg;
219 struct config *config;
223 message = pb_protocol_read_message(client, client->fd);
231 switch (message->action) {
232 case PB_PROTOCOL_ACTION_BOOT:
233 boot_command = talloc(client, struct boot_command);
235 rc = pb_protocol_deserialise_boot_command(boot_command,
238 pb_log("%s: no boot command?", __func__);
242 device_handler_boot(client->server->device_handler,
246 case PB_PROTOCOL_ACTION_CANCEL_DEFAULT:
247 device_handler_cancel_default(client->server->device_handler);
250 case PB_PROTOCOL_ACTION_REINIT:
251 device_handler_reinit(client->server->device_handler);
254 case PB_PROTOCOL_ACTION_CONFIG:
255 config = talloc_zero(client, struct config);
257 rc = pb_protocol_deserialise_config(config, message);
259 pb_log("%s: no config?", __func__);
263 device_handler_update_config(client->server->device_handler,
267 case PB_PROTOCOL_ACTION_ADD_URL:
268 url = pb_protocol_deserialise_string((void *) client, message);
270 device_handler_process_url(client->server->device_handler,
275 pb_log("%s: invalid action %d\n", __func__, message->action);
283 static int discover_server_process_connection(void *arg)
285 struct discover_server *server = arg;
286 struct statuslog_entry *entry;
287 int fd, rc, i, n_devices;
288 struct client *client;
290 /* accept the incoming connection */
291 fd = accept(server->socket, NULL, NULL);
293 pb_log("accept: %s\n", strerror(errno));
297 /* add to our list of clients */
298 client = talloc_zero(server, struct client);
299 list_add(&server->clients, &client->list);
301 talloc_set_destructor(client, client_destructor);
304 client->server = server;
305 client->waiter = waiter_register_io(server->waitset, client->fd,
306 WAIT_IN, discover_server_process_message,
309 /* send sysinfo to client */
310 rc = write_system_info_message(server, client, system_info_get());
314 /* send config to client */
315 rc = write_config_message(server, client, config_get());
319 /* send existing devices to client */
320 n_devices = device_handler_get_device_count(server->device_handler);
321 for (i = 0; i < n_devices; i++) {
322 const struct discover_boot_option *opt;
323 const struct discover_device *device;
325 device = device_handler_get_device(server->device_handler, i);
326 rc = write_device_add_message(server, client, device->device);
330 list_for_each_entry(&device->boot_options, opt, list) {
331 rc = write_boot_option_add_message(server, client,
338 /* send status backlog to client */
339 list_for_each_entry(&server->status, entry, list)
340 write_boot_status_message(server, client, entry->status);
345 void discover_server_notify_device_add(struct discover_server *server,
346 struct device *device)
348 struct client *client;
350 list_for_each_entry(&server->clients, client, list)
351 write_device_add_message(server, client, device);
355 void discover_server_notify_boot_option_add(struct discover_server *server,
356 struct boot_option *boot_option)
358 struct client *client;
360 list_for_each_entry(&server->clients, client, list)
361 write_boot_option_add_message(server, client, boot_option);
364 void discover_server_notify_device_remove(struct discover_server *server,
365 struct device *device)
367 struct client *client;
369 list_for_each_entry(&server->clients, client, list)
370 write_device_remove_message(server, client, device->id);
374 void discover_server_notify_boot_status(struct discover_server *server,
375 struct status *status)
377 struct statuslog_entry *entry;
378 struct client *client;
380 /* Duplicate the status struct to add to the backlog */
381 entry = talloc(server, struct statuslog_entry);
383 pb_log("Failed to allocated saved status!\n");
385 entry->status = talloc(entry, struct status);
387 entry->status->type = status->type;
388 entry->status->message = talloc_strdup(entry->status,
390 entry->status->backlog = true;
391 list_add_tail(&server->status, &entry->list);
397 list_for_each_entry(&server->clients, client, list)
398 write_boot_status_message(server, client, status);
401 void discover_server_notify_system_info(struct discover_server *server,
402 const struct system_info *sysinfo)
404 struct client *client;
406 list_for_each_entry(&server->clients, client, list)
407 write_system_info_message(server, client, sysinfo);
410 void discover_server_notify_config(struct discover_server *server,
411 const struct config *config)
413 struct client *client;
415 list_for_each_entry(&server->clients, client, list)
416 write_config_message(server, client, config);
419 void discover_server_set_device_source(struct discover_server *server,
420 struct device_handler *handler)
422 server->device_handler = handler;
425 struct discover_server *discover_server_init(struct waitset *waitset)
427 struct discover_server *server;
428 struct sockaddr_un addr;
430 server = talloc(NULL, struct discover_server);
434 server->waiter = NULL;
435 server->waitset = waitset;
436 list_init(&server->clients);
437 list_init(&server->status);
439 unlink(PB_SOCKET_PATH);
441 server->socket = socket(AF_UNIX, SOCK_STREAM, 0);
442 if (server->socket < 0) {
443 pb_log("error creating server socket: %s\n", strerror(errno));
447 talloc_set_destructor(server, server_destructor);
449 addr.sun_family = AF_UNIX;
450 strcpy(addr.sun_path, PB_SOCKET_PATH);
452 if (bind(server->socket, (struct sockaddr *)&addr, sizeof(addr))) {
453 pb_log("error binding server socket: %s\n", strerror(errno));
457 if (listen(server->socket, 8)) {
458 pb_log("server socket listen: %s\n", strerror(errno));
462 server->waiter = waiter_register_io(server->waitset, server->socket,
463 WAIT_IN, discover_server_process_connection, server);
472 void discover_server_destroy(struct discover_server *server)