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 list_item list;
37 static int server_destructor(void *arg)
39 struct discover_server *server = arg;
42 waiter_remove(server->waiter);
44 if (server->socket >= 0)
45 close(server->socket);
50 static int client_destructor(void *arg)
52 struct client *client = arg;
57 list_remove(&client->list);
63 static void print_clients(struct discover_server *server)
64 __attribute__((unused));
66 static void print_clients(struct discover_server *server)
68 struct client *client;
70 pb_log("current clients [%p,%p,%p]:\n",
71 &server->clients.head,
72 server->clients.head.prev,
73 server->clients.head.next);
74 list_for_each_entry(&server->clients, client, list)
75 pb_log("\t[%p,%p,%p] client: %d\n", &client->list,
76 client->list.prev, client->list.next,
80 static int client_write_message(
81 struct discover_server *server __attribute__((unused)),
82 struct client *client, struct pb_protocol_message *message)
86 rc = pb_protocol_write_message(client->fd, message);
93 static int write_add_message(struct discover_server *server,
94 struct client *client, const struct device *dev)
96 struct pb_protocol_message *message;
99 len = pb_protocol_device_len(dev);
101 message = pb_protocol_create_message(client,
102 PB_PROTOCOL_ACTION_ADD, len);
106 pb_protocol_serialise_device(dev, message->payload, len);
108 return client_write_message(server, client, message);
111 static int write_remove_message(struct discover_server *server,
112 struct client *client, char *dev_id)
114 struct pb_protocol_message *message;
117 len = strlen(dev_id) + sizeof(uint32_t);
119 message = pb_protocol_create_message(client,
120 PB_PROTOCOL_ACTION_REMOVE, len);
124 pb_protocol_serialise_string(message->payload, dev_id);
126 return client_write_message(server, client, message);
129 static int discover_server_process_message(void *arg)
131 struct pb_protocol_message *message;
132 struct client *client = arg;
134 message = pb_protocol_read_message(client, client->fd);
139 if (message->action != PB_PROTOCOL_ACTION_BOOT) {
140 pb_log("%s: invalid action %d\n", __func__, message->action);
144 /* todo: process boot message */
148 static int discover_server_process_connection(void *arg)
150 struct discover_server *server = arg;
151 struct client *client;
152 int fd, i, n_devices;
154 /* accept the incoming connection */
155 fd = accept(server->socket, NULL, 0);
157 pb_log("accept: %s\n", strerror(errno));
161 /* add to our list of clients */
162 client = talloc(server, struct client);
163 list_add(&server->clients, &client->list);
165 talloc_set_destructor(client, client_destructor);
169 /* send existing devices to client */
170 n_devices = device_handler_get_device_count(server->device_handler);
171 for (i = 0; i < n_devices; i++) {
172 const struct device *device;
174 device = device_handler_get_device(server->device_handler, i);
175 write_add_message(server, client, device);
178 waiter_register(server->waitset, client->fd, WAIT_IN,
179 discover_server_process_message, client);
184 void discover_server_notify_add(struct discover_server *server,
185 struct device *device)
187 struct client *client;
189 list_for_each_entry(&server->clients, client, list)
190 write_add_message(server, client, device);
194 void discover_server_notify_remove(struct discover_server *server,
195 struct device *device)
197 struct client *client;
199 list_for_each_entry(&server->clients, client, list)
200 write_remove_message(server, client, device->id);
204 void discover_server_set_device_source(struct discover_server *server,
205 struct device_handler *handler)
207 server->device_handler = handler;
210 struct discover_server *discover_server_init(struct waitset *waitset)
212 struct discover_server *server;
213 struct sockaddr_un addr;
215 server = talloc(NULL, struct discover_server);
219 server->waiter = NULL;
220 server->waitset = waitset;
221 list_init(&server->clients);
223 unlink(PB_SOCKET_PATH);
225 server->socket = socket(AF_UNIX, SOCK_STREAM, 0);
226 if (server->socket < 0) {
227 pb_log("error creating server socket: %s\n", strerror(errno));
231 talloc_set_destructor(server, server_destructor);
233 addr.sun_family = AF_UNIX;
234 strcpy(addr.sun_path, PB_SOCKET_PATH);
236 if (bind(server->socket, (struct sockaddr *)&addr, sizeof(addr))) {
237 pb_log("error binding server socket: %s\n", strerror(errno));
241 if (listen(server->socket, 8)) {
242 pb_log("server socket listen: %s\n", strerror(errno));
246 server->waiter = waiter_register(server->waitset, server->socket,
247 WAIT_IN, discover_server_process_connection, server);
256 void discover_server_destroy(struct discover_server *server)