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;
41 static int server_destructor(void *arg)
43 struct discover_server *server = arg;
46 waiter_remove(server->waiter);
48 if (server->socket >= 0)
49 close(server->socket);
54 static int client_destructor(void *arg)
56 struct client *client = arg;
62 waiter_remove(client->waiter);
64 list_remove(&client->list);
70 static void print_clients(struct discover_server *server)
71 __attribute__((unused));
73 static void print_clients(struct discover_server *server)
75 struct client *client;
77 pb_debug("current clients [%p,%p,%p]:\n",
78 &server->clients.head,
79 server->clients.head.prev,
80 server->clients.head.next);
81 list_for_each_entry(&server->clients, client, list)
82 pb_debug("\t[%p,%p,%p] client: %d\n", &client->list,
83 client->list.prev, client->list.next,
87 static int client_write_message(
88 struct discover_server *server __attribute__((unused)),
89 struct client *client, struct pb_protocol_message *message)
93 if (client->remote_closed)
96 rc = pb_protocol_write_message(client->fd, message);
98 client->remote_closed = true;
103 static int write_device_add_message(struct discover_server *server,
104 struct client *client, const struct device *dev)
106 struct pb_protocol_message *message;
109 len = pb_protocol_device_len(dev);
111 message = pb_protocol_create_message(client,
112 PB_PROTOCOL_ACTION_DEVICE_ADD, len);
116 pb_protocol_serialise_device(dev, message->payload, len);
118 return client_write_message(server, client, message);
121 static int write_boot_option_add_message(struct discover_server *server,
122 struct client *client, const struct boot_option *opt)
124 struct pb_protocol_message *message;
127 len = pb_protocol_boot_option_len(opt);
129 message = pb_protocol_create_message(client,
130 PB_PROTOCOL_ACTION_BOOT_OPTION_ADD, len);
134 pb_protocol_serialise_boot_option(opt, message->payload, len);
136 return client_write_message(server, client, message);
139 static int write_device_remove_message(struct discover_server *server,
140 struct client *client, char *dev_id)
142 struct pb_protocol_message *message;
145 len = strlen(dev_id) + sizeof(uint32_t);
147 message = pb_protocol_create_message(client,
148 PB_PROTOCOL_ACTION_DEVICE_REMOVE, len);
152 pb_protocol_serialise_string(message->payload, dev_id);
154 return client_write_message(server, client, message);
157 static int write_boot_status_message(struct discover_server *server,
158 struct client *client, const struct boot_status *status)
160 struct pb_protocol_message *message;
163 len = pb_protocol_boot_status_len(status);
165 message = pb_protocol_create_message(client,
166 PB_PROTOCOL_ACTION_STATUS, len);
170 pb_protocol_serialise_boot_status(status, message->payload, len);
172 return client_write_message(server, client, message);
175 static int write_system_info_message(struct discover_server *server,
176 struct client *client, const struct system_info *sysinfo)
178 struct pb_protocol_message *message;
181 len = pb_protocol_system_info_len(sysinfo);
183 message = pb_protocol_create_message(client,
184 PB_PROTOCOL_ACTION_SYSTEM_INFO, len);
188 pb_protocol_serialise_system_info(sysinfo, message->payload, len);
190 return client_write_message(server, client, message);
193 static int discover_server_process_message(void *arg)
195 struct pb_protocol_message *message;
196 struct boot_command *boot_command;
197 struct client *client = arg;
200 message = pb_protocol_read_message(client, client->fd);
208 switch (message->action) {
209 case PB_PROTOCOL_ACTION_BOOT:
210 boot_command = talloc(client, struct boot_command);
212 rc = pb_protocol_deserialise_boot_command(boot_command,
215 pb_log("%s: no boot command?", __func__);
219 device_handler_boot(client->server->device_handler,
223 case PB_PROTOCOL_ACTION_CANCEL_DEFAULT:
224 device_handler_cancel_default(client->server->device_handler);
228 pb_log("%s: invalid action %d\n", __func__, message->action);
236 static int discover_server_process_connection(void *arg)
238 struct discover_server *server = arg;
239 int fd, rc, i, n_devices;
240 struct client *client;
242 /* accept the incoming connection */
243 fd = accept(server->socket, NULL, 0);
245 pb_log("accept: %s\n", strerror(errno));
249 /* add to our list of clients */
250 client = talloc_zero(server, struct client);
251 list_add(&server->clients, &client->list);
253 talloc_set_destructor(client, client_destructor);
256 client->server = server;
257 client->waiter = waiter_register_io(server->waitset, client->fd,
258 WAIT_IN, discover_server_process_message,
261 /* send sysinfo to client */
262 rc = write_system_info_message(server, client, system_info_get());
266 /* send existing devices to client */
267 n_devices = device_handler_get_device_count(server->device_handler);
268 for (i = 0; i < n_devices; i++) {
269 const struct discover_boot_option *opt;
270 const struct discover_device *device;
272 device = device_handler_get_device(server->device_handler, i);
273 rc = write_device_add_message(server, client, device->device);
277 list_for_each_entry(&device->boot_options, opt, list) {
278 rc = write_boot_option_add_message(server, client,
288 void discover_server_notify_device_add(struct discover_server *server,
289 struct device *device)
291 struct client *client;
293 list_for_each_entry(&server->clients, client, list)
294 write_device_add_message(server, client, device);
298 void discover_server_notify_boot_option_add(struct discover_server *server,
299 struct boot_option *boot_option)
301 struct client *client;
303 list_for_each_entry(&server->clients, client, list)
304 write_boot_option_add_message(server, client, boot_option);
307 void discover_server_notify_device_remove(struct discover_server *server,
308 struct device *device)
310 struct client *client;
312 list_for_each_entry(&server->clients, client, list)
313 write_device_remove_message(server, client, device->id);
317 void discover_server_notify_boot_status(struct discover_server *server,
318 struct boot_status *status)
320 struct client *client;
322 list_for_each_entry(&server->clients, client, list)
323 write_boot_status_message(server, client, status);
326 void discover_server_notify_system_info(struct discover_server *server,
327 const struct system_info *sysinfo)
329 struct client *client;
331 list_for_each_entry(&server->clients, client, list)
332 write_system_info_message(server, client, sysinfo);
335 void discover_server_set_device_source(struct discover_server *server,
336 struct device_handler *handler)
338 server->device_handler = handler;
341 struct discover_server *discover_server_init(struct waitset *waitset)
343 struct discover_server *server;
344 struct sockaddr_un addr;
346 server = talloc(NULL, struct discover_server);
350 server->waiter = NULL;
351 server->waitset = waitset;
352 list_init(&server->clients);
354 unlink(PB_SOCKET_PATH);
356 server->socket = socket(AF_UNIX, SOCK_STREAM, 0);
357 if (server->socket < 0) {
358 pb_log("error creating server socket: %s\n", strerror(errno));
362 talloc_set_destructor(server, server_destructor);
364 addr.sun_family = AF_UNIX;
365 strcpy(addr.sun_path, PB_SOCKET_PATH);
367 if (bind(server->socket, (struct sockaddr *)&addr, sizeof(addr))) {
368 pb_log("error binding server socket: %s\n", strerror(errno));
372 if (listen(server->socket, 8)) {
373 pb_log("server socket listen: %s\n", strerror(errno));
377 server->waiter = waiter_register_io(server->waitset, server->socket,
378 WAIT_IN, discover_server_process_connection, server);
387 void discover_server_destroy(struct discover_server *server)