From 2a623a0807ea2cc62558887ab28a45d7bb54142a Mon Sep 17 00:00:00 2001
From: Nico Schottelius <nico@nico-notebook.schottelius.org>
Date: Tue, 19 Mar 2019 23:21:40 +0100
Subject: [PATCH] ++ info ++ link local

---
 doc/plan.org        | 6 +++---
 p4app/controller.py | 7 ++++++-
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/doc/plan.org b/doc/plan.org
index fb5cf2e..0af5f6d 100644
--- a/doc/plan.org
+++ b/doc/plan.org
@@ -113,7 +113,7 @@
 |            |                                                                            |       |
 | 2019-03-21 | Meet Laurent #3                                                            |       |
 |            | - My dog ate my homework                                                   |       |
-|            |                                                                            |       |
+|            | - Router solicitation for finding router on startup!                       |       |
 |            |                                                                            |       |
 |            |                                                                            |       |
 | 2019-03-30 | NAT64 1:1 table ICMP, ICMPv6 working                                       |       |
@@ -770,8 +770,8 @@ DEBUG:main:OUTGOING: <Ether  dst=00:00:0a:00:00:01 src=00:00:0a:00:00:42 type=0x
 DEBUG:main:INCOMING: <Ether  dst=00:00:0a:00:00:01 src=00:00:0a:00:00:42 type=0x86dd |<IPv6  version=6 tc=0 fl=0 plen=32 nh=ICMPv6 hlim=255 src=2001:db8::42 dst=fe80::200:aff:fe00:1 |<ICMPv6ND_NA  type=Neighbor Advertisement code=0 cksum=0xa5e9 R=0 S=1 O=1 res=0x0 tgt=2001:db8::42 |<ICMPv6NDOptDstLLAddr  type=2 len=1 lladdr=00:00:0a:00:00:42 |>>>>
 ****** Do we have a routing for fe80::/10? Probably not. Shouldn't we see it in the controller then?
 ****** TODO Implement address learning?
-
-
+****** TODO Not sure whether we should react on router solicitation
+       - Using static routes -> should do the job
 ***** TODO Implement the calculation
 ***** TODO Sketch the flow for session handling for icmp6 w/o packet loss
       - switch receives icmp6 packet for known prefix
diff --git a/p4app/controller.py b/p4app/controller.py
index d670500..c0fe29c 100644
--- a/p4app/controller.py
+++ b/p4app/controller.py
@@ -49,6 +49,7 @@ class L2Controller(object):
         self.info={}
         self.info['ndp_multicast'] = ipaddress.ip_network("ff02::1:ff00:0/104")
         self.info['mac_address'] = "00:00:0a:00:00:42"
+        self.info['ipv6_link_local'] = ipaddress.ip_address("fe80::200:aff:fe00:42")
 
         self.info['v6_mask'] = 64
         self.info['v6_base'] = ipaddress.ip_network("2001:db8::/32")
@@ -399,7 +400,11 @@ class L2Controller(object):
             if ICMPv6ND_NS in orig_packet and orig_packet['IPv6'].src == '::':
                 log.debug("Neighbor solicitation for checking her own IP address")
             elif ICMPv6MLReport2 in orig_packet and orig_packet['IPv6'].dst == 'ff02::16':
-                log.debug("Multicast registration -- should probably handle this")
+                mc_group = orig_packet['ICMPv6MLDMultAddrRec'].dst
+                log.debug("Multicast registration for {} from {} -- should probably handle this".format(mc_group, cpu_header['ingress_port']))
+            elif ICMPv6ND_RS in orig_packet and orig_packet['IPv6'].dst == 'ff02::2':
+                src = orig_packet['IPv6'].src
+                log.debug("Router solicitation from {} -- should probably handle this?".format(src))
             elif cpu_header.task == self.task['DEBUG']:
                 log.debug("reassambled={}".format(orig_packet.__repr__()))
             elif cpu_header.task == self.task['ICMP6_NS']: