MPLS Unifom mode

- support both pipe and uniform modes for all MPLS LSP
- all API programming for output-labels requires that the mode (and associated data) is specificed
   - API changes in MPLS, BIER and IP are involved
- new DPO [sub] types for MPLS labels to handle the two modes.

Change-Id: I87b76401e996f10dfbdbe4552ff6b19af958783c
Signed-off-by: Neale Ranns <nranns@cisco.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/src/vnet/mpls/packet.h b/src/vnet/mpls/packet.h
index bc67445be89..ca6ac407686 100644
--- a/src/vnet/mpls/packet.h
+++ b/src/vnet/mpls/packet.h
@@ -42,6 +42,32 @@ typedef enum mpls_eos_bit_t_
     [MPLS_EOS] = "eos",				\
 }
 
+/**
+ * The Default TTL added to MPLS label headers when no other value is available
+ */
+#define MPLS_LABEL_DEFAULT_TTL 64
+
+/**
+ * The Default EXP added to MPLS label headers when no other value is available
+ */
+#define MPLS_LABEL_DEFAULT_EXP 0
+
+/**
+ * When in uniform mode convert an IPv[46] DSCP value to an MPLS EXP value
+ */
+static inline u8 ip_dscp_to_mpls_exp (u8 tos)
+{
+    return (tos >> 5);
+}
+
+/**
+ * When in uniform mode convert an MPLS EXP value to an IPv[46] DSCP value
+ */
+static inline u8 mpls_exp_to_ip_dscp (u8 exp)
+{
+    return (exp << 5);
+}
+
 #define FOR_EACH_MPLS_EOS_BIT(_eos) \
     for (_eos = MPLS_NON_EOS; _eos <= MPLS_EOS; _eos++)