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-rw-r--r--src/plugins/nat/lib/inlines.h31
1 files changed, 31 insertions, 0 deletions
diff --git a/src/plugins/nat/lib/inlines.h b/src/plugins/nat/lib/inlines.h
index 46be64d36cf..fe1f7dd27bc 100644
--- a/src/plugins/nat/lib/inlines.h
+++ b/src/plugins/nat/lib/inlines.h
@@ -20,6 +20,37 @@
#include <vnet/ip/icmp46_packet.h>
+always_inline nat_protocol_t
+ip_proto_to_nat_proto (u8 ip_proto)
+{
+ static const nat_protocol_t lookup_table[256] = {
+ [IP_PROTOCOL_TCP] = NAT_PROTOCOL_TCP,
+ [IP_PROTOCOL_UDP] = NAT_PROTOCOL_UDP,
+ [IP_PROTOCOL_ICMP] = NAT_PROTOCOL_ICMP,
+ [IP_PROTOCOL_ICMP6] = NAT_PROTOCOL_ICMP,
+ };
+
+ return lookup_table[ip_proto];
+}
+
+static_always_inline u8
+nat_proto_to_ip_proto (nat_protocol_t nat_proto)
+{
+ ASSERT (nat_proto <= NAT_PROTOCOL_ICMP);
+
+ static const u8 lookup_table[256] = {
+ [NAT_PROTOCOL_OTHER] = ~0,
+ [NAT_PROTOCOL_TCP] = IP_PROTOCOL_TCP,
+ [NAT_PROTOCOL_UDP] = IP_PROTOCOL_UDP,
+ [NAT_PROTOCOL_ICMP] = IP_PROTOCOL_ICMP,
+ };
+
+ ASSERT (NAT_PROTOCOL_OTHER == nat_proto || NAT_PROTOCOL_TCP == nat_proto
+ || NAT_PROTOCOL_UDP == nat_proto || NAT_PROTOCOL_ICMP == nat_proto);
+
+ return lookup_table[nat_proto];
+}
+
static_always_inline u8
icmp_type_is_error_message (u8 icmp_type)
{