DHCPv6 stash some notes

scripts/base/protocols/dhcpv6/README

@@ -0,0 +1,29 @@
+Support for Dynamic Host Configuration Protocol (DHCP) analysis.
+
+
+Log structure:
+
+DHCPv4 logs transactions
+
+
+We could also go [txid, iaid] and produce a log for each entry, but that'd
+be the correct thing to do!
+
+Probably overthinking if there's only ever a single IAID per transaction,
+but in theory this is possible.
+
+# What if there's no IAID? That's okay, too.
+
+So... pivot on IAID?
+
+State:
+
+   transaction_id: count
+   ianas: vector of IA_NA
+
+   # Common stuff
+
+
+# Log entry
+
+txid, ia_na.aid, iaaddr

scripts/base/protocols/dhcpv6/dpd.sig

@@ -0,0 +1,5 @@
+# signature dhcpv6_todo {
+#  ip-proto == udp
+#  payload /^.{236}\x63\x82\x53\x63/
+#  enable "dhcpv6"
+#}

src/analyzer/protocol/dhcpv6/NOTES

@@ -0,0 +1,61 @@
+2 messages
+
+
+INFORMATION-REQUEST message
+
+   * No address or route delegation
+
+SOLICIT message
+  * Rapid Commit option
+
+
+REPLY message
+  * 
+
+RENEW message -> REPLY
+
+
+4 messages
+
+SOLICIT -> ALL_DHCP
+  -> ADVERTISE message
+
+REQUEST message to the selected server
+ -> asks for addresses, delegated prefixes, other configuration
+
+  -> REPLY
+
+
+
+Reconfigure messages
+  * the client listens for them
+    -> information request
+    -> renew
+    -> rebind
+
+
+6.1 Stateless DHCP
+
+* other configuration parameters
+
+
+6.3 Prefix Delegation
+
+IA     - identity association
+IA_NA  - non-temporary address
+IA_TA  - temporary address
+IA_PD  - Prefix delegation
+
+
+
+FreeBSD:
+
+
+  dhcpcd -6 em0
+  dhcpcd -6 em0 --release
+
+After changing some configuration in /usr/local/etc/dhcpcd.conf
+
+  rapid_commit
+  vendorclassid
+  hostname