add lsrm and lidm

doc/proto_v0.txt

@@ -430,7 +430,6 @@ the RC.a matching the ipv6 address it originated from.
   v: 0
 }
 
-
 link relay commit message (LRCM)
 
 request a commit to relay traffic to another node.
@@ -566,14 +565,46 @@ link relay exit record (LRXR)
   z: "<64 bytes signature>"
 }
 
----
+link immediate dht message (LIDM):
+
+transfer one or more dht messages directly without a previously made path.
+
+{
+  a: "d",
+  d: [many, dht, messages],
+  v: 0,
+}
 
-direct paths:
 
-a direct path is a "0 hop" path built by Alice to communicate directly to Bob
-for point to point transmission of routing layer messages.
+link stateless relay message (LSRM)
 
-these are built by sending a LRCM where B has 1 entry
+statelessly relay a link message.
+
+{
+  a: "r",
+  c: r5n_counter_uint8,
+  d: "<32 bytes rc.K of destination>",
+  s: "<32 bytes rc.K of source>",
+  v: 0,
+  x: "<N bytes encrypted link message>",
+  y: "<24 bytes nounce>",
+  z: "<64 bytes signature>"
+}
+
+ONLY exchanged over ethernet, if recieved from an IP link it MUST be discarded.
+
+relay an encrypted link message from source s to destination d.
+check signature z using public key s and discard if invalid signature.
+
+if d is equal to ourRC.k then decrypt x via SD(KE(d, s), y, x) and process it as
+a link message. if the inner decrypted link message is a LRCM forward all
+following LRUM, LRDM and LRSM to s via a LSRM. LIDM and LSRM are discarded.
+
+if d is not equal to ourRC.k then forward it to an ethernet peer that is cloeser
+to d than you are. if you are closer to d than all of your other ethernet peers
+then increment c and send to the ethernet peer with the lowest detected latency
+that isn't the peer that this message was recieved from but ONLY if c is less
+than 128. if c is equal to or greater than 128 then the message is discarded.
 
 ---
 
@@ -584,9 +615,6 @@ layer and ip (internet protocol) for exit traffic or ap (anonymous protocol) for
 hidden services. replies to messages are sent back via the path they
 originated from inside a LRDM.
 
-for direct communication between routers a direct path MUST be used, these
-messages MUST NOT be sent on the link leyer.
-
 ipv4 addresses are allowed via ipv4 mapped ipv6 addresses, i.e. ::ffff.10.0.0.1
 
 obtain exit address message (OXAM)
@@ -682,8 +710,7 @@ the X value is sent on the appropriate exit network interface.
 
 When we recieve an ip packet from the internet to an exit address, we put it
 into a TDFM, signed with the exit info's signing key and send it downstream the
-corrispondinn path in an LRDM.
-
+corrisponding path in an LRDM.
 
 update exit path message (UXPM)