9 #include <sys/socket.h>
11 #include <asm/byteorder.h>
13 #include <talloc/talloc.h>
15 #include "pb-protocol/pb-protocol.h"
16 #include "list/list.h"
20 #include "device-handler.h"
22 struct discover_server {
24 struct waiter *waiter;
26 struct device_handler *device_handler;
30 struct list_item list;
35 static int server_destructor(void *arg)
37 struct discover_server *server = arg;
40 waiter_remove(server->waiter);
42 if (server->socket >= 0)
43 close(server->socket);
48 static int client_destructor(void *arg)
50 struct client *client = arg;
55 list_remove(&client->list);
61 static void print_clients(struct discover_server *server)
62 __attribute__((unused));
64 static void print_clients(struct discover_server *server)
66 struct client *client;
68 printf("current clients [%p,%p,%p]:\n",
69 &server->clients.head,
70 server->clients.head.prev,
71 server->clients.head.next);
72 list_for_each_entry(&server->clients, client, list)
73 printf("\t[%p,%p,%p] client: %d\n", &client->list,
74 client->list.prev, client->list.next,
78 static int client_write_message(struct discover_server *server,
79 struct client *client, struct pb_protocol_message *message)
83 rc = pb_protocol_write_message(client->fd, message);
90 static int write_add_message(struct discover_server *server,
91 struct client *client, struct device *dev)
93 struct pb_protocol_message *message;
96 len = pb_protocol_device_len(dev);
98 message = pb_protocol_create_message(client,
99 PB_PROTOCOL_ACTION_ADD, len);
103 pb_protocol_serialise_device(dev, message->payload, len);
105 return client_write_message(server, client, message);
108 static int write_remove_message(struct discover_server *server,
109 struct client *client, char *dev_id)
111 struct pb_protocol_message *message;
114 len = strlen(dev_id) + sizeof(uint32_t);
116 message = pb_protocol_create_message(client,
117 PB_PROTOCOL_ACTION_REMOVE, len);
121 pb_protocol_serialise_string(message->payload, dev_id);
123 return client_write_message(server, client, message);
126 static int discover_server_process(void *arg)
128 struct discover_server *server = arg;
129 struct device *devices;
130 struct client *client;
131 int fd, i, n_devices;
133 /* accept the incoming connection */
134 fd = accept(server->socket, NULL, 0);
136 pb_log("accept: %s\n", strerror(errno));
140 /* add to our list of clients */
141 client = talloc(server, struct client);
142 list_add(&server->clients, &client->list);
144 talloc_set_destructor(client, client_destructor);
148 /* send existing devices to client */
149 n_devices = device_handler_get_current_devices(server->device_handler,
151 for (i = 0; i < n_devices; i++)
152 write_add_message(server, client, &devices[i]);
157 void discover_server_notify_add(struct discover_server *server,
158 struct device *device)
160 struct client *client;
162 list_for_each_entry(&server->clients, client, list)
163 write_add_message(server, client, device);
167 void discover_server_notify_remove(struct discover_server *server,
168 struct device *device)
170 struct client *client;
172 list_for_each_entry(&server->clients, client, list)
173 write_remove_message(server, client, device->id);
177 void discover_server_set_device_source(struct discover_server *server,
178 struct device_handler *handler)
180 server->device_handler = handler;
183 struct discover_server *discover_server_init(void)
185 struct discover_server *server;
186 struct sockaddr_un addr;
188 server = talloc(NULL, struct discover_server);
192 server->waiter = NULL;
193 list_init(&server->clients);
195 unlink(PB_SOCKET_PATH);
197 server->socket = socket(AF_UNIX, SOCK_STREAM, 0);
198 if (server->socket < 0) {
199 pb_log("error creating server socket: %s\n", strerror(errno));
203 talloc_set_destructor(server, server_destructor);
205 addr.sun_family = AF_UNIX;
206 strcpy(addr.sun_path, PB_SOCKET_PATH);
208 if (bind(server->socket, (struct sockaddr *)&addr, sizeof(addr))) {
209 pb_log("error binding server socket: %s\n", strerror(errno));
213 if (listen(server->socket, 8)) {
214 pb_log("server socket listen: %s\n", strerror(errno));
218 server->waiter = waiter_register(server->socket, WAIT_IN,
219 discover_server_process, server);
228 void discover_server_destroy(struct discover_server *server)