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(void *arg)
131 struct discover_server *server = arg;
132 struct client *client;
133 int fd, i, n_devices;
135 /* accept the incoming connection */
136 fd = accept(server->socket, NULL, 0);
138 pb_log("accept: %s\n", strerror(errno));
142 /* add to our list of clients */
143 client = talloc(server, struct client);
144 list_add(&server->clients, &client->list);
146 talloc_set_destructor(client, client_destructor);
150 /* send existing devices to client */
151 n_devices = device_handler_get_device_count(server->device_handler);
152 for (i = 0; i < n_devices; i++) {
153 const struct device *device;
155 device = device_handler_get_device(server->device_handler, i);
156 write_add_message(server, client, device);
162 void discover_server_notify_add(struct discover_server *server,
163 struct device *device)
165 struct client *client;
167 list_for_each_entry(&server->clients, client, list)
168 write_add_message(server, client, device);
172 void discover_server_notify_remove(struct discover_server *server,
173 struct device *device)
175 struct client *client;
177 list_for_each_entry(&server->clients, client, list)
178 write_remove_message(server, client, device->id);
182 void discover_server_set_device_source(struct discover_server *server,
183 struct device_handler *handler)
185 server->device_handler = handler;
188 struct discover_server *discover_server_init(struct waitset *waitset)
190 struct discover_server *server;
191 struct sockaddr_un addr;
193 server = talloc(NULL, struct discover_server);
197 server->waiter = NULL;
198 server->waitset = waitset;
199 list_init(&server->clients);
201 unlink(PB_SOCKET_PATH);
203 server->socket = socket(AF_UNIX, SOCK_STREAM, 0);
204 if (server->socket < 0) {
205 pb_log("error creating server socket: %s\n", strerror(errno));
209 talloc_set_destructor(server, server_destructor);
211 addr.sun_family = AF_UNIX;
212 strcpy(addr.sun_path, PB_SOCKET_PATH);
214 if (bind(server->socket, (struct sockaddr *)&addr, sizeof(addr))) {
215 pb_log("error binding server socket: %s\n", strerror(errno));
219 if (listen(server->socket, 8)) {
220 pb_log("server socket listen: %s\n", strerror(errno));
224 server->waiter = waiter_register(server->waitset, server->socket,
225 WAIT_IN, discover_server_process, server);
234 void discover_server_destroy(struct discover_server *server)