ipcpd: Add ipcpd over UDP/IPv6

This adds an IPCP that runs over UDP/IPv6. It's structured like the
eth-dix and eth-llc in that it builds two separate binaries:
ipcpd-udp4 and ipcpd-udp6. The IRM CLI is backwards compatible in that
type 'udp' will resolve to type 'udp4'.

Signed-off-by: Dimitri Staessens <dimitri@ouroboros.rocks>
Signed-off-by: Sander Vrijders <sander@ouroboros.rocks>

1 files changed, 11 insertions, 3 deletions

diff --git a/src/lib/pb/ipcp_config.proto b/src/lib/pb/ipcp_config.proto
index becc63c0..1308c6d1 100644
--- a/src/lib/pb/ipcp_config.proto
+++ b/src/lib/pb/ipcp_config.proto
@@ -70,16 +70,24 @@ message eth_config_msg {
         required uint32 ethertype = 2;
 }
 
-message udp_config_msg {
+message udp4_config_msg {
         required uint32 ip_addr  = 1;
         required uint32 port     = 2;
         required uint32 dns_addr = 3; /* set to 0 if unused */
 }
 
+message udp6_config_msg {
+        required bytes  ip_addr  = 1;
+        required uint32 port     = 2;
+        required bytes  dns_addr = 3; /* set to NULL if unused */
+}
+
+
 message ipcp_config_msg {
         required layer_info_msg layer_info =  1;
         required uint32 ipcp_type          =  2;
         optional uni_config_msg unicast    =  3;
-        optional udp_config_msg udp        =  4;
-        optional eth_config_msg eth        =  5;
+        optional udp4_config_msg udp4      =  4;
+        optional udp6_config_msg udp6      =  5;
+        optional eth_config_msg eth        =  6;
 }