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 waiter *waiter;
27 struct device_handler *device_handler;
31 struct list_item list;
36 static int server_destructor(void *arg)
38 struct discover_server *server = arg;
41 waiter_remove(server->waiter);
43 if (server->socket >= 0)
44 close(server->socket);
49 static int client_destructor(void *arg)
51 struct client *client = arg;
56 list_remove(&client->list);
62 static void print_clients(struct discover_server *server)
63 __attribute__((unused));
65 static void print_clients(struct discover_server *server)
67 struct client *client;
69 pb_log("current clients [%p,%p,%p]:\n",
70 &server->clients.head,
71 server->clients.head.prev,
72 server->clients.head.next);
73 list_for_each_entry(&server->clients, client, list)
74 pb_log("\t[%p,%p,%p] client: %d\n", &client->list,
75 client->list.prev, client->list.next,
79 static int client_write_message(
80 struct discover_server *server __attribute__((unused)),
81 struct client *client, struct pb_protocol_message *message)
85 rc = pb_protocol_write_message(client->fd, message);
92 static int write_add_message(struct discover_server *server,
93 struct client *client, const struct device *dev)
95 struct pb_protocol_message *message;
98 len = pb_protocol_device_len(dev);
100 message = pb_protocol_create_message(client,
101 PB_PROTOCOL_ACTION_ADD, len);
105 pb_protocol_serialise_device(dev, message->payload, len);
107 return client_write_message(server, client, message);
110 static int write_remove_message(struct discover_server *server,
111 struct client *client, char *dev_id)
113 struct pb_protocol_message *message;
116 len = strlen(dev_id) + sizeof(uint32_t);
118 message = pb_protocol_create_message(client,
119 PB_PROTOCOL_ACTION_REMOVE, len);
123 pb_protocol_serialise_string(message->payload, dev_id);
125 return client_write_message(server, client, message);
128 static int discover_server_process(void *arg)
130 struct discover_server *server = arg;
131 struct client *client;
132 int fd, i, n_devices;
134 /* accept the incoming connection */
135 fd = accept(server->socket, NULL, 0);
137 pb_log("accept: %s\n", strerror(errno));
141 /* add to our list of clients */
142 client = talloc(server, struct client);
143 list_add(&server->clients, &client->list);
145 talloc_set_destructor(client, client_destructor);
149 /* send existing devices to client */
150 n_devices = device_handler_get_device_count(server->device_handler);
151 for (i = 0; i < n_devices; i++) {
152 const struct device *device;
154 device = device_handler_get_device(server->device_handler, i);
155 write_add_message(server, client, device);
161 void discover_server_notify_add(struct discover_server *server,
162 struct device *device)
164 struct client *client;
166 list_for_each_entry(&server->clients, client, list)
167 write_add_message(server, client, device);
171 void discover_server_notify_remove(struct discover_server *server,
172 struct device *device)
174 struct client *client;
176 list_for_each_entry(&server->clients, client, list)
177 write_remove_message(server, client, device->id);
181 void discover_server_set_device_source(struct discover_server *server,
182 struct device_handler *handler)
184 server->device_handler = handler;
187 struct discover_server *discover_server_init(void)
189 struct discover_server *server;
190 struct sockaddr_un addr;
192 server = talloc(NULL, struct discover_server);
196 server->waiter = NULL;
197 list_init(&server->clients);
199 unlink(PB_SOCKET_PATH);
201 server->socket = socket(AF_UNIX, SOCK_STREAM, 0);
202 if (server->socket < 0) {
203 pb_log("error creating server socket: %s\n", strerror(errno));
207 talloc_set_destructor(server, server_destructor);
209 addr.sun_family = AF_UNIX;
210 strcpy(addr.sun_path, PB_SOCKET_PATH);
212 if (bind(server->socket, (struct sockaddr *)&addr, sizeof(addr))) {
213 pb_log("error binding server socket: %s\n", strerror(errno));
217 if (listen(server->socket, 8)) {
218 pb_log("server socket listen: %s\n", strerror(errno));
222 server->waiter = waiter_register(server->socket, WAIT_IN,
223 discover_server_process, server);
232 void discover_server_destroy(struct discover_server *server)