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"
25 struct discover_server {
27 struct waitset *waitset;
28 struct waiter *waiter;
30 struct device_handler *device_handler;
34 struct discover_server *server;
35 struct list_item list;
36 struct waiter *waiter;
42 static int server_destructor(void *arg)
44 struct discover_server *server = arg;
47 waiter_remove(server->waiter);
49 if (server->socket >= 0)
50 close(server->socket);
55 static int client_destructor(void *arg)
57 struct client *client = arg;
63 waiter_remove(client->waiter);
65 list_remove(&client->list);
71 static void print_clients(struct discover_server *server)
72 __attribute__((unused));
74 static void print_clients(struct discover_server *server)
76 struct client *client;
78 pb_debug("current clients [%p,%p,%p]:\n",
79 &server->clients.head,
80 server->clients.head.prev,
81 server->clients.head.next);
82 list_for_each_entry(&server->clients, client, list)
83 pb_debug("\t[%p,%p,%p] client: %d\n", &client->list,
84 client->list.prev, client->list.next,
88 static int client_write_message(
89 struct discover_server *server __attribute__((unused)),
90 struct client *client, struct pb_protocol_message *message)
94 if (client->remote_closed)
97 rc = pb_protocol_write_message(client->fd, message);
99 client->remote_closed = true;
104 static int write_device_add_message(struct discover_server *server,
105 struct client *client, const struct device *dev)
107 struct pb_protocol_message *message;
110 len = pb_protocol_device_len(dev);
112 message = pb_protocol_create_message(client,
113 PB_PROTOCOL_ACTION_DEVICE_ADD, len);
117 pb_protocol_serialise_device(dev, message->payload, len);
119 return client_write_message(server, client, message);
122 static int write_boot_option_add_message(struct discover_server *server,
123 struct client *client, const struct boot_option *opt)
125 struct pb_protocol_message *message;
128 len = pb_protocol_boot_option_len(opt);
130 message = pb_protocol_create_message(client,
131 PB_PROTOCOL_ACTION_BOOT_OPTION_ADD, len);
135 pb_protocol_serialise_boot_option(opt, message->payload, len);
137 return client_write_message(server, client, message);
140 static int write_device_remove_message(struct discover_server *server,
141 struct client *client, char *dev_id)
143 struct pb_protocol_message *message;
146 len = strlen(dev_id) + sizeof(uint32_t);
148 message = pb_protocol_create_message(client,
149 PB_PROTOCOL_ACTION_DEVICE_REMOVE, len);
153 pb_protocol_serialise_string(message->payload, dev_id);
155 return client_write_message(server, client, message);
158 static int write_boot_status_message(struct discover_server *server,
159 struct client *client, const struct boot_status *status)
161 struct pb_protocol_message *message;
164 len = pb_protocol_boot_status_len(status);
166 message = pb_protocol_create_message(client,
167 PB_PROTOCOL_ACTION_STATUS, len);
171 pb_protocol_serialise_boot_status(status, message->payload, len);
173 return client_write_message(server, client, message);
176 static int write_system_info_message(struct discover_server *server,
177 struct client *client, const struct system_info *sysinfo)
179 struct pb_protocol_message *message;
182 len = pb_protocol_system_info_len(sysinfo);
184 message = pb_protocol_create_message(client,
185 PB_PROTOCOL_ACTION_SYSTEM_INFO, len);
189 pb_protocol_serialise_system_info(sysinfo, message->payload, len);
191 return client_write_message(server, client, message);
194 static int write_config_message(struct discover_server *server,
195 struct client *client, const struct config *config)
197 struct pb_protocol_message *message;
200 len = pb_protocol_config_len(config);
202 message = pb_protocol_create_message(client,
203 PB_PROTOCOL_ACTION_CONFIG, len);
207 pb_protocol_serialise_config(config, message->payload, len);
209 return client_write_message(server, client, message);
212 static int discover_server_process_message(void *arg)
214 struct pb_protocol_message *message;
215 struct boot_command *boot_command;
216 struct client *client = arg;
217 struct config *config;
220 message = pb_protocol_read_message(client, client->fd);
228 switch (message->action) {
229 case PB_PROTOCOL_ACTION_BOOT:
230 boot_command = talloc(client, struct boot_command);
232 rc = pb_protocol_deserialise_boot_command(boot_command,
235 pb_log("%s: no boot command?", __func__);
239 device_handler_boot(client->server->device_handler,
243 case PB_PROTOCOL_ACTION_CANCEL_DEFAULT:
244 device_handler_cancel_default(client->server->device_handler);
247 case PB_PROTOCOL_ACTION_CONFIG:
248 config = talloc_zero(client, struct config);
250 rc = pb_protocol_deserialise_config(config, message);
252 pb_log("%s: no config?", __func__);
256 device_handler_update_config(client->server->device_handler,
261 pb_log("%s: invalid action %d\n", __func__, message->action);
269 static int discover_server_process_connection(void *arg)
271 struct discover_server *server = arg;
272 int fd, rc, i, n_devices;
273 struct client *client;
275 /* accept the incoming connection */
276 fd = accept(server->socket, NULL, 0);
278 pb_log("accept: %s\n", strerror(errno));
282 /* add to our list of clients */
283 client = talloc_zero(server, struct client);
284 list_add(&server->clients, &client->list);
286 talloc_set_destructor(client, client_destructor);
289 client->server = server;
290 client->waiter = waiter_register_io(server->waitset, client->fd,
291 WAIT_IN, discover_server_process_message,
294 /* send sysinfo to client */
295 rc = write_system_info_message(server, client, system_info_get());
299 /* send config to client */
300 rc = write_config_message(server, client, config_get());
304 /* send existing devices to client */
305 n_devices = device_handler_get_device_count(server->device_handler);
306 for (i = 0; i < n_devices; i++) {
307 const struct discover_boot_option *opt;
308 const struct discover_device *device;
310 device = device_handler_get_device(server->device_handler, i);
311 rc = write_device_add_message(server, client, device->device);
315 list_for_each_entry(&device->boot_options, opt, list) {
316 rc = write_boot_option_add_message(server, client,
326 void discover_server_notify_device_add(struct discover_server *server,
327 struct device *device)
329 struct client *client;
331 list_for_each_entry(&server->clients, client, list)
332 write_device_add_message(server, client, device);
336 void discover_server_notify_boot_option_add(struct discover_server *server,
337 struct boot_option *boot_option)
339 struct client *client;
341 list_for_each_entry(&server->clients, client, list)
342 write_boot_option_add_message(server, client, boot_option);
345 void discover_server_notify_device_remove(struct discover_server *server,
346 struct device *device)
348 struct client *client;
350 list_for_each_entry(&server->clients, client, list)
351 write_device_remove_message(server, client, device->id);
355 void discover_server_notify_boot_status(struct discover_server *server,
356 struct boot_status *status)
358 struct client *client;
360 list_for_each_entry(&server->clients, client, list)
361 write_boot_status_message(server, client, status);
364 void discover_server_notify_system_info(struct discover_server *server,
365 const struct system_info *sysinfo)
367 struct client *client;
369 list_for_each_entry(&server->clients, client, list)
370 write_system_info_message(server, client, sysinfo);
373 void discover_server_notify_config(struct discover_server *server,
374 const struct config *config)
376 struct client *client;
378 list_for_each_entry(&server->clients, client, list)
379 write_config_message(server, client, config);
382 void discover_server_set_device_source(struct discover_server *server,
383 struct device_handler *handler)
385 server->device_handler = handler;
388 struct discover_server *discover_server_init(struct waitset *waitset)
390 struct discover_server *server;
391 struct sockaddr_un addr;
393 server = talloc(NULL, struct discover_server);
397 server->waiter = NULL;
398 server->waitset = waitset;
399 list_init(&server->clients);
401 unlink(PB_SOCKET_PATH);
403 server->socket = socket(AF_UNIX, SOCK_STREAM, 0);
404 if (server->socket < 0) {
405 pb_log("error creating server socket: %s\n", strerror(errno));
409 talloc_set_destructor(server, server_destructor);
411 addr.sun_family = AF_UNIX;
412 strcpy(addr.sun_path, PB_SOCKET_PATH);
414 if (bind(server->socket, (struct sockaddr *)&addr, sizeof(addr))) {
415 pb_log("error binding server socket: %s\n", strerror(errno));
419 if (listen(server->socket, 8)) {
420 pb_log("server socket listen: %s\n", strerror(errno));
424 server->waiter = waiter_register_io(server->waitset, server->socket,
425 WAIT_IN, discover_server_process_connection, server);
434 void discover_server_destroy(struct discover_server *server)