Services: Move to Userland/Services/

1 files changed, 59 insertions, 0 deletions

diff --git a/Userland/Services/DHCPClient/DHCPv4.cpp b/Userland/Services/DHCPClient/DHCPv4.cpp
new file mode 100644
index 0000000000..36430f4eec
--- /dev/null
+++ b/Userland/Services/DHCPClient/DHCPv4.cpp
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2020, The SerenityOS developers.
+ * 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.
+ */
+
+#include "DHCPv4.h"
+
+//#define DHCPV4_DEBUG
+
+ParsedDHCPv4Options DHCPv4Packet::parse_options() const
+{
+    ParsedDHCPv4Options options;
+    for (size_t index = 4; index < DHCPV4_OPTION_FIELD_MAX_LENGTH; ++index) {
+        auto opt_name = *(const DHCPOption*)&m_options[index];
+        switch (opt_name) {
+        case DHCPOption::Pad:
+            continue;
+        case DHCPOption::End:
+            goto escape;
+        default:
+            ++index;
+            auto length = m_options[index];
+            if ((size_t)length > DHCPV4_OPTION_FIELD_MAX_LENGTH - index) {
+                dbg() << "Bogus option length " << length << " assuming forgotten END";
+                break;
+            }
+#ifdef DHCPV4_DEBUG
+            dbg() << "DHCP Option " << (u8)opt_name << " with length " << length;
+#endif
+            ++index;
+            options.options.set(opt_name, { length, &m_options[index] });
+            index += length - 1;
+            break;
+        }
+    }
+escape:;
+    return options;
+}