VPN4 and VPN6 literals

From now on, protocol static accepts VPN4 and VPN6 addressess.
With some concerns about VPN6 Route Distinguishers, I finally chose
to have the same format as for VPN4 (where it is defined by RFC 4364).

1 files changed, 18 insertions, 3 deletions

diff --git a/lib/net.c b/lib/net.c
index 5a7e6fec..e46be8b2 100644
--- a/lib/net.c
+++ b/lib/net.c
@@ -58,6 +58,7 @@ int
 net_format(const net_addr *N, char *buf, int buflen)
 {
   net_addr_union *n = (void *) N;
+  buf[0] = 0;
 
   switch (n->n.type)
   {
@@ -66,9 +67,23 @@ net_format(const net_addr *N, char *buf, int buflen)
   case NET_IP6:
     return bsnprintf(buf, buflen, "%I6/%d", n->ip6.prefix, n->ip6.pxlen);
   case NET_VPN4:
-    return bsnprintf(buf, buflen, "%u:%u %I4/%d", (u32) (n->vpn4.rd >> 32), (u32) n->vpn4.rd, n->vpn4.prefix, n->vpn4.pxlen);
+    switch (n->vpn4.rd >> 48)
+    {
+      case 0: return bsnprintf(buf, buflen, "0:%u:%u %I4/%d", (u32) (n->vpn4.rd >> 32), (u32) n->vpn4.rd, n->vpn4.prefix, n->vpn4.pxlen);
+      case 1: return bsnprintf(buf, buflen, "1:%I4:%u %I4/%d", ip4_from_u32(n->vpn4.rd >> 16), (u32) (n->vpn4.rd & 0xffff), n->vpn4.prefix, n->vpn4.pxlen);
+      case 2: return bsnprintf(buf, buflen, "2:%u:%u %I4/%d", (u32) (n->vpn4.rd >> 16), (u32) (n->vpn4.rd & 0xffff), n->vpn4.prefix, n->vpn4.pxlen);
+    }
+    return bsnprintf(buf, buflen, "X: %016x %I4/%d", (n->vpn4.rd), n->vpn4.prefix, n->vpn4.pxlen);
+
+    /* XXX: RD format is specified for VPN4; not found any for VPN6, reusing the same as for VPN4. */
   case NET_VPN6:
-    return bsnprintf(buf, buflen, "%u:%u %I6/%d", (u32) (n->vpn6.rd >> 32), (u32) n->vpn6.rd, n->vpn6.prefix, n->vpn6.pxlen);
+    switch (n->vpn6.rd >> 48)
+    {
+      case 0: return bsnprintf(buf, buflen, "0:%u:%u %I6/%d", (u32) (n->vpn6.rd >> 32), (u32) n->vpn6.rd, n->vpn6.prefix, n->vpn6.pxlen);
+      case 1: return bsnprintf(buf, buflen, "1:%I4:%u %I6/%d", ip4_from_u32(n->vpn6.rd >> 16), (u32) (n->vpn6.rd & 0xffff), n->vpn6.prefix, n->vpn6.pxlen);
+      case 2: return bsnprintf(buf, buflen, "2:%u:%u %I6/%d", (u32) (n->vpn6.rd >> 16), (u32) (n->vpn6.rd & 0xffff), n->vpn6.prefix, n->vpn6.pxlen);
+    }
+    return bsnprintf(buf, buflen, "X: %016x %I6/%d", (n->vpn6.rd), n->vpn6.prefix, n->vpn6.pxlen);
   case NET_ROA4:
     return bsnprintf(buf, buflen, "%I4/%u-%u AS%u",  n->roa4.prefix, n->roa4.pxlen, n->roa4.max_pxlen, n->roa4.asn);
   case NET_ROA6:
@@ -81,7 +96,7 @@ net_format(const net_addr *N, char *buf, int buflen)
     return bsnprintf(buf, buflen, "%u", n->mpls.label);
   }
 
-  return 0;
+  bug("unknown network type");
 }
 
 ip_addr