1 files changed, 14 insertions, 0 deletions

diff --git a/src/include/gnunet_tun_lib.h b/src/include/gnunet_tun_lib.h
index 89cfdd2b3..b30b2b03a 100644
--- a/src/include/gnunet_tun_lib.h
+++ b/src/include/gnunet_tun_lib.h
@@ -181,5 +181,19 @@ GNUNET_TUN_initialize_ipv6_header (struct GNUNET_TUN_IPv6Header *ip,
                                    const struct in6_addr *src,
                                    const struct in6_addr *dst);
 
+/**
+ * Calculate IPv6 TCP checksum.
+ *
+ * @param ipv6 header fully initialized
+ * @param tcp header (initialized except for CRC)
+ * @param payload the TCP payload
+ * @param payload_length number of bytes of TCP payload
+ */
+void
+GNUNET_TUN_calculate_tcp6_checksum (const struct GNUNET_TUN_IPv6Header *ip,
+                                    struct GNUNET_TUN_TcpHeader *tcp,
+                                    const void *payload,
+                                    uint16_t payload_length);
+
 
 #endif