Second night's commit.

We're a bit closer to something sane, now. We can wrap, but not unwrap,
packets.

Asymmetric encryption is *big*. encrypted text with a 4096-bit RSA
public key is 512 bytes. We can't fragment yet. Fortunately, this
isn't an infinite regress once we *can* fragment.

Performance is still a big question mark, of course.

There may still be endianness issues hanging around.

The eid<->rloc map is almost certainly far, far too slow to be of
any use in the real world.

pass-1/rloc-registry.json

@@ -1,19 +1,79 @@
 {
     "type": "rloc-registry",
    
-    "eid_rloc_map": {
-        "172.16.10.0/24" : "172.16.10.2",
-        "172.16.11.0/24" : "172.16.10.2",
-        "172.16.12.0/24" : "172.16.12.2",
-        "fc00:1::/64" : "fc00::2",
-        "fc00:2::/64" : "fc00:2::2"
-    },
+    "eid_rloc_map": [
+      { "family":"ipv4", "network":"172.16.10.0", "netmask":24, "rloc":"172.16.10.2"},
+      { "family":"ipv4", "network":"172.16.11.0", "netmask":24, "rloc":"172.16.10.2"},
+      { "family":"ipv4", "network":"172.16.12.0", "netmask":24, "rloc":"172.16.12.2"},
+      { "family":"ipv6", "network":"fc00:1::",    "netmask":64, "rloc":"fc00::2"    },
+      { "family":"ipv6", "network":"fc00:2::",    "netmask":64, "rloc":"fc00:2::2"  }
+    ],
     
     "keys": {
-        "172.16.10.2":"public key for 172.16.10.2",
-        "172.16.12.2":"public key for 172.16.12.2",
-        "fc00::2":"public key for fc00::2",
-        "fc00:2::2":"public key for fc00:2::2"
+        "172.16.10.2":
+"-----BEGIN PUBLIC KEY-----
+MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEA0FxctMUibDqkVhChIvJg
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+t39smrDydkWUQWYPiiUKKM0CAwEAAQ==
+-----END PUBLIC KEY-----
+",
+        "172.16.12.2":
+"-----BEGIN PUBLIC KEY-----
+MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAvYljSQd/jHZtSTc6Z2E1
+6D37s/MDGmWux/0ulRLsnGRnIj/cd8b3wV2AKbucjEOZ70MH5mU3szz/eZwD5z3A
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+QFqgpMLJRNxWj7UUOWm3xjECAwEAAQ==
+-----END PUBLIC KEY-----
+",
+        "fc00::2":
+"-----BEGIN PUBLIC KEY-----
+MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAnQhQ9S190q/+t0/QqplD
++aRHLrVm8oWFHKqfaE11zZ+7adse4NFgzEWMRN2bUIl47W/VuTHn3NtsF3myYjtX
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+-----END PUBLIC KEY-----",
+
+        "fc00:2::2":
+"-----BEGIN PUBLIC KEY-----
+MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAt/rGbJ46DIciiRHaknkV
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+-----END PUBLIC KEY-----
+"       
     }