Change libtle_udp to use dring.

[tldk.git] / lib / libtle_udp / misc.h

diff --git a/lib/libtle_udp/misc.h b/lib/libtle_udp/misc.h
index 3874647..359f400 100644 (file)
--- a/lib/libtle_udp/misc.h
+++ b/lib/libtle_udp/misc.h
@@ -44,6 +44,21 @@ _mbuf_tx_offload(uint64_t il2, uint64_t il3, uint64_t il4, uint64_t tso,
        return il2 | il3 << 7 | il4 << 16 | tso << 24 | ol3 << 40 | ol2 << 49;
 }
 
+/*
+ * Given the value of mbuf's tx_offload, calculate L4 payload offset.
+ */
+static inline uint32_t
+_tx_offload_l4_offset(uint64_t ofl)
+{
+       uint32_t l2, l3, l4;
+
+       l2 = ofl & 0x7f;
+       l3 = ofl >> 7 & 0x1ff;
+       l4 = ofl >> 16 & UINT8_MAX;
+
+       return l2 + l3 + l4;
+}
+
 /*
  * Routines to calculate L3/L4 checksums in SW.
  * Pretty similar to ones from DPDK librte_net/rte_ip.h,