net/AllocatedSocketAddress: new sockaddr wrapper class

2015-07-22 10:52:43 +02:00
parent 20d69b957f
commit f084bbbf35
3 changed files with 237 additions and 0 deletions
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2012-2015 Max Kellermann <max@duempel.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the
+ * distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
+ * FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "AllocatedSocketAddress.hxx"
+
+#include <assert.h>
+#include <string.h>
+
+#ifdef HAVE_UN
+#include <sys/un.h>
+#endif
+
+AllocatedSocketAddress &
+AllocatedSocketAddress::operator=(SocketAddress src)
+{
+	if (src.IsNull()) {
+		Clear();
+	} else {
+		SetSize(src.GetSize());
+		memcpy(address, src.GetAddress(), size);
+	}
+
+	return *this;
+}
+
+void
+AllocatedSocketAddress::SetSize(size_type new_size)
+{
+	if (size == new_size)
+		return;
+
+	free(address);
+	size = new_size;
+	address = (struct sockaddr *)malloc(size);
+}
+
+#ifdef HAVE_UN
+
+void
+AllocatedSocketAddress::SetLocal(const char *path)
+{
+	const bool is_abstract = *path == '@';
+
+	/* sun_path must be null-terminated unless it's an abstract
+	   socket */
+	const size_t path_length = strlen(path) + !is_abstract;
+
+	struct sockaddr_un *sun;
+	SetSize(sizeof(*sun) - sizeof(sun->sun_path) + path_length);
+	sun = (struct sockaddr_un *)address;
+	sun->sun_family = AF_UNIX;
+	memcpy(sun->sun_path, path, path_length);
+
+	if (is_abstract)
+		sun->sun_path[0] = 0;
+}
+
+#endif