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;
38 static int server_destructor(void *arg)
40 struct discover_server *server = arg;
43 waiter_remove(server->waiter);
45 if (server->socket >= 0)
46 close(server->socket);
51 static int client_destructor(void *arg)
53 struct client *client = arg;
58 list_remove(&client->list);
64 static void print_clients(struct discover_server *server)
65 __attribute__((unused));
67 static void print_clients(struct discover_server *server)
69 struct client *client;
71 pb_log("current clients [%p,%p,%p]:\n",
72 &server->clients.head,
73 server->clients.head.prev,
74 server->clients.head.next);
75 list_for_each_entry(&server->clients, client, list)
76 pb_log("\t[%p,%p,%p] client: %d\n", &client->list,
77 client->list.prev, client->list.next,
81 static int client_write_message(
82 struct discover_server *server __attribute__((unused)),
83 struct client *client, struct pb_protocol_message *message)
87 rc = pb_protocol_write_message(client->fd, message);
94 static int write_add_message(struct discover_server *server,
95 struct client *client, const struct device *dev)
97 struct pb_protocol_message *message;
100 len = pb_protocol_device_len(dev);
102 message = pb_protocol_create_message(client,
103 PB_PROTOCOL_ACTION_ADD, len);
107 pb_protocol_serialise_device(dev, message->payload, len);
109 return client_write_message(server, client, message);
112 static int write_remove_message(struct discover_server *server,
113 struct client *client, char *dev_id)
115 struct pb_protocol_message *message;
118 len = strlen(dev_id) + sizeof(uint32_t);
120 message = pb_protocol_create_message(client,
121 PB_PROTOCOL_ACTION_REMOVE, len);
125 pb_protocol_serialise_string(message->payload, dev_id);
127 return client_write_message(server, client, message);
130 static int discover_server_process_message(void *arg)
132 struct pb_protocol_message *message;
133 struct boot_command *boot_command;
134 struct client *client = arg;
137 message = pb_protocol_read_message(client, client->fd);
142 if (message->action != PB_PROTOCOL_ACTION_BOOT) {
143 pb_log("%s: invalid action %d\n", __func__, message->action);
147 boot_command = talloc(client, struct boot_command);
149 rc = pb_protocol_deserialise_boot_command(boot_command, message);
151 pb_log("%s: no boot command?", __func__);
155 device_handler_boot(client->server->device_handler, boot_command);
160 static int discover_server_process_connection(void *arg)
162 struct discover_server *server = arg;
163 struct client *client;
164 int fd, i, n_devices;
166 /* accept the incoming connection */
167 fd = accept(server->socket, NULL, 0);
169 pb_log("accept: %s\n", strerror(errno));
173 /* add to our list of clients */
174 client = talloc(server, struct client);
175 list_add(&server->clients, &client->list);
177 talloc_set_destructor(client, client_destructor);
180 client->server = server;
182 /* send existing devices to client */
183 n_devices = device_handler_get_device_count(server->device_handler);
184 for (i = 0; i < n_devices; i++) {
185 const struct device *device;
187 device = device_handler_get_device(server->device_handler, i);
188 write_add_message(server, client, device);
191 waiter_register(server->waitset, client->fd, WAIT_IN,
192 discover_server_process_message, client);
197 void discover_server_notify_add(struct discover_server *server,
198 struct device *device)
200 struct client *client;
202 list_for_each_entry(&server->clients, client, list)
203 write_add_message(server, client, device);
207 void discover_server_notify_remove(struct discover_server *server,
208 struct device *device)
210 struct client *client;
212 list_for_each_entry(&server->clients, client, list)
213 write_remove_message(server, client, device->id);
217 void discover_server_set_device_source(struct discover_server *server,
218 struct device_handler *handler)
220 server->device_handler = handler;
223 struct discover_server *discover_server_init(struct waitset *waitset)
225 struct discover_server *server;
226 struct sockaddr_un addr;
228 server = talloc(NULL, struct discover_server);
232 server->waiter = NULL;
233 server->waitset = waitset;
234 list_init(&server->clients);
236 unlink(PB_SOCKET_PATH);
238 server->socket = socket(AF_UNIX, SOCK_STREAM, 0);
239 if (server->socket < 0) {
240 pb_log("error creating server socket: %s\n", strerror(errno));
244 talloc_set_destructor(server, server_destructor);
246 addr.sun_family = AF_UNIX;
247 strcpy(addr.sun_path, PB_SOCKET_PATH);
249 if (bind(server->socket, (struct sockaddr *)&addr, sizeof(addr))) {
250 pb_log("error binding server socket: %s\n", strerror(errno));
254 if (listen(server->socket, 8)) {
255 pb_log("server socket listen: %s\n", strerror(errno));
259 server->waiter = waiter_register(server->waitset, server->socket,
260 WAIT_IN, discover_server_process_connection, server);
269 void discover_server_destroy(struct discover_server *server)