1 files changed, 78 insertions, 0 deletions
diff --git a/Services/LookupServer/DNSResponse.h b/Services/LookupServer/DNSResponse.h
new file mode 100644
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+++ b/Services/LookupServer/DNSResponse.h
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+/*
+ * Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. 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 COPYRIGHT HOLDER 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.
+ */
+
+
+#pragma once
+
+#include "DNSAnswer.h"
+#include "DNSQuestion.h"
+#include <AK/Types.h>
+#include <AK/Vector.h>
+#include <AK/Optional.h>
+
+class DNSResponse {
+public:
+    static Optional<DNSResponse> from_raw_response(const u8*, size_t);
+
+    u16 id() const { return m_id; }
+    const Vector<DNSQuestion>& questions() const { return m_questions; }
+    const Vector<DNSAnswer>& answers() const { return m_answers; }
+
+    u16 question_count() const
+    {
+        ASSERT(m_questions.size() <= UINT16_MAX);
+        return m_questions.size();
+    }
+
+    u16 answer_count() const
+    {
+        ASSERT(m_answers.size() <= UINT16_MAX);
+        return m_answers.size();
+    }
+
+    enum class Code : u8 {
+        NOERROR = 0,
+        FORMERR = 1,
+        SERVFAIL = 2,
+        NXDOMAIN = 3,
+        NOTIMP = 4,
+        REFUSED = 5,
+        YXDOMAIN = 6,
+        XRRSET = 7,
+        NOTAUTH = 8,
+        NOTZONE = 9,
+    };
+
+    Code code() const { return (Code)m_code; }
+
+private:
+    DNSResponse() {}
+
+    u16 m_id { 0 };
+    u8 m_code { 0 };
+    Vector<DNSQuestion> m_questions;
+    Vector<DNSAnswer> m_answers;
+};