first revision of new manager webapp

src/manager/gateway.c

@@ -0,0 +1,153 @@
+/**
+ * @file gateway.c
+ *
+ * @brief Implementation of gateway_t.
+ *
+ */
+
+/*
+ * Copyright (C) 2007 Martin Willi
+ * Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+#include "gateway.h"
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <unistd.h>
+#include <string.h>
+
+typedef struct private_gateway_t private_gateway_t;
+
+/**
+ * private data of gateway
+ */
+struct private_gateway_t {
+
+	/**
+	 * public functions
+	 */
+	gateway_t public;
+	
+	/**
+	 * name of the gateway
+	 */
+	char *name;
+	
+	/**
+	 * connection information
+	 */
+	host_t *host;
+	
+	/**
+	 * socket file descriptor, > 0 if connected
+	 */
+	int fd;
+};
+
+/**
+ * establish connection to gateway
+ */
+static bool connect_(private_gateway_t *this)
+{
+	if (this->fd >= 0)
+	{
+		close(this->fd);
+	}
+	this->fd = socket(AF_INET, SOCK_STREAM, 0);
+	if (this->fd < 0)
+	{
+		return FALSE;
+	}
+	if (connect(this->fd, this->host->get_sockaddr(this->host),
+				*this->host->get_sockaddr_len(this->host)) != 0)
+	{
+		close(this->fd);
+		this->fd = -1;
+		return FALSE;
+	}
+	return TRUE;
+}
+
+
+/**
+ * Implementation of gateway_t.request.
+ */
+static char* request(private_gateway_t *this, char *xml)
+{
+	if (this->fd < 0)
+	{
+		if (!connect_(this))
+		{
+			return NULL;
+		}
+	}
+	while (TRUE)
+	{
+		char buf[8096];
+		ssize_t len;
+		
+		len = strlen(xml);
+		if (send(this->fd, xml, len, 0) != len)
+		{
+			return NULL;
+		}
+		len = recv(this->fd, buf, sizeof(buf) - 1, 0);
+		if (len < 0)
+		{
+			return NULL;
+		}
+		if (len == 0)
+		{
+			if (!connect_(this))
+			{
+				return NULL;
+			}
+			continue;
+		}
+		buf[len] = 0;
+		return strdup(buf);
+	}
+}
+	
+/**
+ * Implementation of gateway_t.destroy
+ */
+static void destroy(private_gateway_t *this)
+{
+	if (this->fd >= 0)
+	{
+		close(this->fd);
+	}
+	this->host->destroy(this->host);
+	free(this->name);
+	free(this);
+}
+
+/*
+ * see header file
+ */
+gateway_t *gateway_create(char *name, host_t *host)
+{
+	private_gateway_t *this = malloc_thing(private_gateway_t);
+	
+	this->public.request = (char*(*)(gateway_t*, char *xml))request;
+	this->public.destroy = (void(*)(gateway_t*))destroy;
+	
+	this->name = strdup(name);
+	this->host = host;
+	this->fd = -1;
+	
+	return &this->public;
+}
+