1 files changed, 112 insertions, 0 deletions
diff --git a/external/construct/protocols/layer3/dhcpv6.py b/external/construct/protocols/layer3/dhcpv6.py
new file mode 100644
index 0000000..ed4f573
--- /dev/null
+++ b/external/construct/protocols/layer3/dhcpv6.py
@@ -0,0 +1,112 @@
+"""
+the Dynamic Host Configuration Protocol (DHCP) for IPv6
+
+http://www.networksorcery.com/enp/rfc/rfc3315.txt
+"""
+from construct import *
+from ipv6 import Ipv6Address
+import six
+
+
+dhcp_option = Struct("dhcp_option",
+    Enum(UBInt16("code"),
+        OPTION_CLIENTID = 1,
+        OPTION_SERVERID = 2,
+        OPTION_IA_NA = 3,
+        OPTION_IA_TA = 4,
+        OPTION_IAADDR = 5,
+        OPTION_ORO = 6,
+        OPTION_PREFERENCE = 7,
+        OPTION_ELAPSED_TIME = 8,
+        OPTION_RELAY_MSG = 9,
+        OPTION_AUTH = 11,
+        OPTION_UNICAST = 12,
+        OPTION_STATUS_CODE = 13,
+        OPTION_RAPID_COMMIT = 14,
+        OPTION_USER_CLASS = 15,
+        OPTION_VENDOR_CLASS = 16,
+        OPTION_VENDOR_OPTS = 17,
+        OPTION_INTERFACE_ID = 18,
+        OPTION_RECONF_MSG = 19,
+        OPTION_RECONF_ACCEPT = 20,
+        SIP_SERVERS_DOMAIN_NAME_LIST = 21,
+        SIP_SERVERS_IPV6_ADDRESS_LIST = 22,
+        DNS_RECURSIVE_NAME_SERVER = 23,
+        DOMAIN_SEARCH_LIST = 24,
+        OPTION_IA_PD = 25,
+        OPTION_IAPREFIX = 26,
+        OPTION_NIS_SERVERS = 27,
+        OPTION_NISP_SERVERS = 28,
+        OPTION_NIS_DOMAIN_NAME = 29,
+        OPTION_NISP_DOMAIN_NAME = 30,
+        SNTP_SERVER_LIST = 31,
+        INFORMATION_REFRESH_TIME = 32,
+        BCMCS_CONTROLLER_DOMAIN_NAME_LIST = 33,
+        BCMCS_CONTROLLER_IPV6_ADDRESS_LIST = 34,
+        OPTION_GEOCONF_CIVIC = 36,
+        OPTION_REMOTE_ID = 37,
+        RELAY_AGENT_SUBSCRIBER_ID = 38,
+        OPTION_CLIENT_FQDN = 39,        
+    ),
+    UBInt16("length"),
+    Field("data", lambda ctx: ctx.length),
+)
+
+client_message = Struct("client_message",
+    Bitwise(BitField("transaction_id", 24)),
+)
+
+relay_message = Struct("relay_message",
+    Byte("hop_count"),
+    Ipv6Address("linkaddr"),
+    Ipv6Address("peeraddr"),
+)
+
+dhcp_message = Struct("dhcp_message",
+    Enum(Byte("msgtype"),
+        # these are client-server messages
+        SOLICIT = 1,
+        ADVERTISE = 2,
+        REQUEST = 3,
+        CONFIRM = 4,
+        RENEW = 5,
+        REBIND = 6,
+        REPLY = 7,
+        RELEASE_ = 8,
+        DECLINE_ = 9,
+        RECONFIGURE = 10,
+        INFORMATION_REQUEST = 11,
+        # these two are relay messages
+        RELAY_FORW = 12,
+        RELAY_REPL = 13,
+    ),
+    # relay messages have a different structure from client-server messages
+    Switch("params", lambda ctx: ctx.msgtype,
+        {
+            "RELAY_FORW" : relay_message,
+            "RELAY_REPL" : relay_message,
+        },
+        default = client_message,
+    ),
+    Rename("options", GreedyRange(dhcp_option)),
+)
+
+
+if __name__ == "__main__":
+    test1 = six.b("\x03\x11\x22\x33\x00\x17\x00\x03ABC\x00\x05\x00\x05HELLO")
+    test2 = six.b("\x0c\x040123456789abcdef0123456789abcdef\x00\x09\x00\x0bhello world\x00\x01\x00\x00")
+    print (dhcp_message.parse(test1))
+    print (dhcp_message.parse(test2))
+
+
+
+
+
+
+
+
+
+
+
+
+