BGP: Support for MPLS labels and VPN SAFI

Basic support for SAFI 4 and 128 (MPLS labeled IP and VPN) for IPv4 and
IPv6. Should work for route reflector, but does not properly handle
originating routes with next hop self.

Based on patches from Jan Matejka.

1 files changed, 14 insertions, 0 deletions

diff --git a/lib/unaligned.h b/lib/unaligned.h
index 4e841f3a..0da1fdb4 100644
--- a/lib/unaligned.h
+++ b/lib/unaligned.h
@@ -29,6 +29,13 @@ get_u16(const void *p)
 }
 
 static inline u32
+get_u24(const void *P)
+{
+  const byte *p = P;
+  return (p[0] << 16) + (p[1] << 8) + p[2];
+}
+
+static inline u32
 get_u32(const void *p)
 {
   u32 x;
@@ -53,6 +60,13 @@ put_u16(void *p, u16 x)
 }
 
 static inline void
+put_u24(void *p, u32 x)
+{
+  x = htonl(x);
+  memcpy(p, ((char *) &x) + 1, 3);
+}
+
+static inline void
 put_u32(void *p, u32 x)
 {
   x = htonl(x);