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"
23 struct discover_server {
25 struct waitset *waitset;
26 struct waiter *waiter;
28 struct device_handler *device_handler;
32 struct discover_server *server;
33 struct list_item list;
34 struct waiter *waiter;
39 static int server_destructor(void *arg)
41 struct discover_server *server = arg;
44 waiter_remove(server->waiter);
46 if (server->socket >= 0)
47 close(server->socket);
52 static int client_destructor(void *arg)
54 struct client *client = arg;
60 waiter_remove(client->waiter);
62 list_remove(&client->list);
68 static void print_clients(struct discover_server *server)
69 __attribute__((unused));
71 static void print_clients(struct discover_server *server)
73 struct client *client;
75 pb_log("current clients [%p,%p,%p]:\n",
76 &server->clients.head,
77 server->clients.head.prev,
78 server->clients.head.next);
79 list_for_each_entry(&server->clients, client, list)
80 pb_log("\t[%p,%p,%p] client: %d\n", &client->list,
81 client->list.prev, client->list.next,
85 static int client_write_message(
86 struct discover_server *server __attribute__((unused)),
87 struct client *client, struct pb_protocol_message *message)
91 rc = pb_protocol_write_message(client->fd, message);
98 static int write_device_add_message(struct discover_server *server,
99 struct client *client, const struct device *dev)
101 struct pb_protocol_message *message;
104 len = pb_protocol_device_len(dev);
106 message = pb_protocol_create_message(client,
107 PB_PROTOCOL_ACTION_DEVICE_ADD, len);
111 pb_protocol_serialise_device(dev, message->payload, len);
113 return client_write_message(server, client, message);
116 static int write_boot_option_add_message(struct discover_server *server,
117 struct client *client, const struct boot_option *opt)
119 struct pb_protocol_message *message;
122 len = pb_protocol_boot_option_len(opt);
124 message = pb_protocol_create_message(client,
125 PB_PROTOCOL_ACTION_BOOT_OPTION_ADD, len);
129 pb_protocol_serialise_boot_option(opt, message->payload, len);
131 return client_write_message(server, client, message);
134 static int write_device_remove_message(struct discover_server *server,
135 struct client *client, char *dev_id)
137 struct pb_protocol_message *message;
140 len = strlen(dev_id) + sizeof(uint32_t);
142 message = pb_protocol_create_message(client,
143 PB_PROTOCOL_ACTION_DEVICE_REMOVE, len);
147 pb_protocol_serialise_string(message->payload, dev_id);
149 return client_write_message(server, client, message);
152 static int write_boot_status_message(struct discover_server *server,
153 struct client *client, const struct boot_status *status)
155 struct pb_protocol_message *message;
158 len = pb_protocol_boot_status_len(status);
160 message = pb_protocol_create_message(client,
161 PB_PROTOCOL_ACTION_STATUS, len);
165 pb_protocol_serialise_boot_status(status, message->payload, len);
167 return client_write_message(server, client, message);
170 static int discover_server_process_message(void *arg)
172 struct pb_protocol_message *message;
173 struct boot_command *boot_command;
174 struct client *client = arg;
177 message = pb_protocol_read_message(client, client->fd);
185 if (message->action != PB_PROTOCOL_ACTION_BOOT) {
186 pb_log("%s: invalid action %d\n", __func__, message->action);
190 boot_command = talloc(client, struct boot_command);
192 rc = pb_protocol_deserialise_boot_command(boot_command, message);
194 pb_log("%s: no boot command?", __func__);
198 device_handler_boot(client->server->device_handler, boot_command);
203 static int discover_server_process_connection(void *arg)
205 struct discover_server *server = arg;
206 int fd, rc, i, n_devices;
207 struct client *client;
209 /* accept the incoming connection */
210 fd = accept(server->socket, NULL, 0);
212 pb_log("accept: %s\n", strerror(errno));
216 /* add to our list of clients */
217 client = talloc_zero(server, struct client);
218 list_add(&server->clients, &client->list);
220 talloc_set_destructor(client, client_destructor);
223 client->server = server;
225 /* send existing devices to client */
226 n_devices = device_handler_get_device_count(server->device_handler);
227 for (i = 0; i < n_devices; i++) {
228 const struct discover_boot_option *opt;
229 const struct discover_device *device;
231 device = device_handler_get_device(server->device_handler, i);
232 rc = write_device_add_message(server, client, device->device);
236 list_for_each_entry(&device->boot_options, opt, list) {
237 rc = write_boot_option_add_message(server, client,
244 client->waiter = waiter_register(server->waitset, client->fd, WAIT_IN,
245 discover_server_process_message, client);
250 void discover_server_notify_device_add(struct discover_server *server,
251 struct device *device)
253 struct client *client;
255 list_for_each_entry(&server->clients, client, list)
256 write_device_add_message(server, client, device);
260 void discover_server_notify_boot_option_add(struct discover_server *server,
261 struct boot_option *boot_option)
263 struct client *client;
265 list_for_each_entry(&server->clients, client, list)
266 write_boot_option_add_message(server, client, boot_option);
269 void discover_server_notify_device_remove(struct discover_server *server,
270 struct device *device)
272 struct client *client;
274 list_for_each_entry(&server->clients, client, list)
275 write_device_remove_message(server, client, device->id);
279 void discover_server_notify_boot_status(struct discover_server *server,
280 struct boot_status *status)
282 struct client *client;
284 list_for_each_entry(&server->clients, client, list)
285 write_boot_status_message(server, client, status);
288 void discover_server_set_device_source(struct discover_server *server,
289 struct device_handler *handler)
291 server->device_handler = handler;
294 struct discover_server *discover_server_init(struct waitset *waitset)
296 struct discover_server *server;
297 struct sockaddr_un addr;
299 server = talloc(NULL, struct discover_server);
303 server->waiter = NULL;
304 server->waitset = waitset;
305 list_init(&server->clients);
307 unlink(PB_SOCKET_PATH);
309 server->socket = socket(AF_UNIX, SOCK_STREAM, 0);
310 if (server->socket < 0) {
311 pb_log("error creating server socket: %s\n", strerror(errno));
315 talloc_set_destructor(server, server_destructor);
317 addr.sun_family = AF_UNIX;
318 strcpy(addr.sun_path, PB_SOCKET_PATH);
320 if (bind(server->socket, (struct sockaddr *)&addr, sizeof(addr))) {
321 pb_log("error binding server socket: %s\n", strerror(errno));
325 if (listen(server->socket, 8)) {
326 pb_log("server socket listen: %s\n", strerror(errno));
330 server->waiter = waiter_register(server->waitset, server->socket,
331 WAIT_IN, discover_server_process_connection, server);
340 void discover_server_destroy(struct discover_server *server)