9 #include <sys/socket.h>
11 #include <asm/byteorder.h>
13 #include <talloc/talloc.h>
14 #include <waiter/waiter.h>
17 #include "pb-protocol/pb-protocol.h"
18 #include "list/list.h"
20 #include "device-handler.h"
21 #include "discover-server.h"
24 struct discover_server {
26 struct waitset *waitset;
27 struct waiter *waiter;
29 struct device_handler *device_handler;
33 struct discover_server *server;
34 struct list_item list;
35 struct waiter *waiter;
40 static int server_destructor(void *arg)
42 struct discover_server *server = arg;
45 waiter_remove(server->waiter);
47 if (server->socket >= 0)
48 close(server->socket);
53 static int client_destructor(void *arg)
55 struct client *client = arg;
61 waiter_remove(client->waiter);
63 list_remove(&client->list);
69 static void print_clients(struct discover_server *server)
70 __attribute__((unused));
72 static void print_clients(struct discover_server *server)
74 struct client *client;
76 pb_log("current clients [%p,%p,%p]:\n",
77 &server->clients.head,
78 server->clients.head.prev,
79 server->clients.head.next);
80 list_for_each_entry(&server->clients, client, list)
81 pb_log("\t[%p,%p,%p] client: %d\n", &client->list,
82 client->list.prev, client->list.next,
86 static int client_write_message(
87 struct discover_server *server __attribute__((unused)),
88 struct client *client, struct pb_protocol_message *message)
92 rc = pb_protocol_write_message(client->fd, message);
99 static int write_device_add_message(struct discover_server *server,
100 struct client *client, const struct device *dev)
102 struct pb_protocol_message *message;
105 len = pb_protocol_device_len(dev);
107 message = pb_protocol_create_message(client,
108 PB_PROTOCOL_ACTION_DEVICE_ADD, len);
112 pb_protocol_serialise_device(dev, message->payload, len);
114 return client_write_message(server, client, message);
117 static int write_boot_option_add_message(struct discover_server *server,
118 struct client *client, const struct boot_option *opt)
120 struct pb_protocol_message *message;
123 len = pb_protocol_boot_option_len(opt);
125 message = pb_protocol_create_message(client,
126 PB_PROTOCOL_ACTION_BOOT_OPTION_ADD, len);
130 pb_protocol_serialise_boot_option(opt, message->payload, len);
132 return client_write_message(server, client, message);
135 static int write_device_remove_message(struct discover_server *server,
136 struct client *client, char *dev_id)
138 struct pb_protocol_message *message;
141 len = strlen(dev_id) + sizeof(uint32_t);
143 message = pb_protocol_create_message(client,
144 PB_PROTOCOL_ACTION_DEVICE_REMOVE, len);
148 pb_protocol_serialise_string(message->payload, dev_id);
150 return client_write_message(server, client, message);
153 static int write_boot_status_message(struct discover_server *server,
154 struct client *client, const struct boot_status *status)
156 struct pb_protocol_message *message;
159 len = pb_protocol_boot_status_len(status);
161 message = pb_protocol_create_message(client,
162 PB_PROTOCOL_ACTION_STATUS, len);
166 pb_protocol_serialise_boot_status(status, message->payload, len);
168 return client_write_message(server, client, message);
171 static int write_system_info_message(struct discover_server *server,
172 struct client *client, const struct system_info *sysinfo)
174 struct pb_protocol_message *message;
177 len = pb_protocol_system_info_len(sysinfo);
179 message = pb_protocol_create_message(client,
180 PB_PROTOCOL_ACTION_SYSTEM_INFO, len);
184 pb_protocol_serialise_system_info(sysinfo, message->payload, len);
186 return client_write_message(server, client, message);
189 static int discover_server_process_message(void *arg)
191 struct pb_protocol_message *message;
192 struct boot_command *boot_command;
193 struct client *client = arg;
196 message = pb_protocol_read_message(client, client->fd);
204 switch (message->action) {
205 case PB_PROTOCOL_ACTION_BOOT:
206 boot_command = talloc(client, struct boot_command);
208 rc = pb_protocol_deserialise_boot_command(boot_command,
211 pb_log("%s: no boot command?", __func__);
215 device_handler_boot(client->server->device_handler,
219 case PB_PROTOCOL_ACTION_CANCEL_DEFAULT:
220 device_handler_cancel_default(client->server->device_handler);
224 pb_log("%s: invalid action %d\n", __func__, message->action);
232 static int discover_server_process_connection(void *arg)
234 struct discover_server *server = arg;
235 int fd, rc, i, n_devices;
236 struct client *client;
238 /* accept the incoming connection */
239 fd = accept(server->socket, NULL, 0);
241 pb_log("accept: %s\n", strerror(errno));
245 /* add to our list of clients */
246 client = talloc_zero(server, struct client);
247 list_add(&server->clients, &client->list);
249 talloc_set_destructor(client, client_destructor);
252 client->server = server;
254 /* send sysinfo to client */
255 rc = write_system_info_message(server, client, system_info_get());
259 /* send existing devices to client */
260 n_devices = device_handler_get_device_count(server->device_handler);
261 for (i = 0; i < n_devices; i++) {
262 const struct discover_boot_option *opt;
263 const struct discover_device *device;
265 device = device_handler_get_device(server->device_handler, i);
266 rc = write_device_add_message(server, client, device->device);
270 list_for_each_entry(&device->boot_options, opt, list) {
271 rc = write_boot_option_add_message(server, client,
278 client->waiter = waiter_register_io(server->waitset, client->fd,
279 WAIT_IN, discover_server_process_message,
285 void discover_server_notify_device_add(struct discover_server *server,
286 struct device *device)
288 struct client *client;
290 list_for_each_entry(&server->clients, client, list)
291 write_device_add_message(server, client, device);
295 void discover_server_notify_boot_option_add(struct discover_server *server,
296 struct boot_option *boot_option)
298 struct client *client;
300 list_for_each_entry(&server->clients, client, list)
301 write_boot_option_add_message(server, client, boot_option);
304 void discover_server_notify_device_remove(struct discover_server *server,
305 struct device *device)
307 struct client *client;
309 list_for_each_entry(&server->clients, client, list)
310 write_device_remove_message(server, client, device->id);
314 void discover_server_notify_boot_status(struct discover_server *server,
315 struct boot_status *status)
317 struct client *client;
319 list_for_each_entry(&server->clients, client, list)
320 write_boot_status_message(server, client, status);
323 void discover_server_notify_system_info(struct discover_server *server,
324 const struct system_info *sysinfo)
326 struct client *client;
328 list_for_each_entry(&server->clients, client, list)
329 write_system_info_message(server, client, sysinfo);
332 void discover_server_set_device_source(struct discover_server *server,
333 struct device_handler *handler)
335 server->device_handler = handler;
338 struct discover_server *discover_server_init(struct waitset *waitset)
340 struct discover_server *server;
341 struct sockaddr_un addr;
343 server = talloc(NULL, struct discover_server);
347 server->waiter = NULL;
348 server->waitset = waitset;
349 list_init(&server->clients);
351 unlink(PB_SOCKET_PATH);
353 server->socket = socket(AF_UNIX, SOCK_STREAM, 0);
354 if (server->socket < 0) {
355 pb_log("error creating server socket: %s\n", strerror(errno));
359 talloc_set_destructor(server, server_destructor);
361 addr.sun_family = AF_UNIX;
362 strcpy(addr.sun_path, PB_SOCKET_PATH);
364 if (bind(server->socket, (struct sockaddr *)&addr, sizeof(addr))) {
365 pb_log("error binding server socket: %s\n", strerror(errno));
369 if (listen(server->socket, 8)) {
370 pb_log("server socket listen: %s\n", strerror(errno));
374 server->waiter = waiter_register_io(server->waitset, server->socket,
375 WAIT_IN, discover_server_process_connection, server);
384 void discover_server_destroy(struct discover_server *server)