From 32e6a41f33e5576716b351bd473a27939fe94fa1 Mon Sep 17 00:00:00 2001
From: Jeremy Kerr <jk@ozlabs.org>
Date: Mon, 15 Dec 2008 15:22:34 +1100
Subject: Initial support for multiple UIs

Move the device discovery code from separate udev helpers to a single
process to listen on two sockets: one SOCK_DGRAM for incoming udev
events, and one SOCK_STREAM for UIs to connect.

Initial support for client/server infrastructure, still need to wire-up
the udev messages.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
---
 ui/common/discover-client.c | 111 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 111 insertions(+)
 create mode 100644 ui/common/discover-client.c

(limited to 'ui/common/discover-client.c')

diff --git a/ui/common/discover-client.c b/ui/common/discover-client.c
new file mode 100644
index 0000000..bc5a4fa
--- /dev/null
+++ b/ui/common/discover-client.c
@@ -0,0 +1,111 @@
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdint.h>
+
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <asm/byteorder.h>
+
+#include <talloc/talloc.h>
+
+#include "ui/common/discover-client.h"
+#include "ui/common/device.h"
+#include "pb-protocol/pb-protocol.h"
+
+struct discover_client {
+	int fd;
+	struct discover_client_ops ops;
+};
+
+static int discover_client_destructor(void *arg)
+{
+	struct discover_client *client = arg;
+
+	if (client->fd >= 0)
+		close(client->fd);
+
+	return 0;
+}
+
+struct discover_client* discover_client_init(struct discover_client_ops *ops)
+{
+	struct discover_client *client;
+	struct sockaddr_un addr;
+
+	client = talloc(NULL, struct discover_client);
+	if (!client)
+		return NULL;
+
+	memcpy(&client->ops, ops, sizeof(client->ops));
+
+	client->fd = socket(AF_UNIX, SOCK_STREAM, 0);
+	if (!client->fd < 0) {
+		perror("socket");
+		goto out_err;
+	}
+
+	talloc_set_destructor(client, discover_client_destructor);
+
+	addr.sun_family = AF_UNIX;
+	strcpy(addr.sun_path, PB_SOCKET_PATH);
+
+	if (connect(client->fd, (struct sockaddr *)&addr, sizeof(addr))) {
+		perror("connect");
+		goto out_err;
+	}
+
+	return client;
+
+out_err:
+	talloc_free(client);
+	return NULL;
+}
+
+int discover_client_get_fd(struct discover_client *client)
+{
+	return client->fd;
+}
+
+void discover_client_destroy(struct discover_client *client)
+{
+	talloc_free(client);
+}
+
+int discover_client_process(struct discover_client *client)
+{
+	struct pb_protocol_message *message;
+	struct device *dev;
+	char *dev_id;
+
+	message = pb_protocol_read_message(client, client->fd);
+
+	if (!message)
+		return 0;
+
+	switch (message->action) {
+	case PB_PROTOCOL_ACTION_ADD:
+		dev = pb_protocol_deserialise_device(client, message);
+		if (!dev) {
+			printf("no device?\n");
+			return 0;
+		}
+		client->ops.add_device(dev);
+		talloc_free(dev);
+		break;
+	case PB_PROTOCOL_ACTION_REMOVE:
+		dev_id = pb_protocol_deserialise_string(client, message);
+		if (!dev_id) {
+			printf("no device id?\n");
+			return 0;
+		}
+		client->ops.remove_device(dev_id);
+		break;
+	default:
+		printf("unknown action %d\n", message->action);
+	}
+
+
+	return 0;
+}
-- 
cgit v1.2.1