1 files changed, 43 insertions, 0 deletions
diff --git a/nuttx/net/utils/utils.h b/nuttx/net/utils/utils.h
index 10c386edf..1ccd0aedc 100644
--- a/nuttx/net/utils/utils.h
+++ b/nuttx/net/utils/utils.h
@@ -87,6 +87,49 @@ extern "C"
 struct timeval;
 void net_dsec2timeval(uint16_t dsec, FAR struct timeval *tv);
 
+/****************************************************************************
+ * Name: tcp_chksum
+ *
+ * Description:
+ *   Calculate the TCP checksum of the packet in d_buf and d_appdata.
+ *
+ *   The TCP checksum is the Internet checksum of data contents of the
+ *   TCP segment, and a pseudo-header as defined in RFC793.
+ *
+ *   Note: The d_appdata pointer that points to the packet data may
+ *   point anywhere in memory, so it is not possible to simply calculate
+ *   the Internet checksum of the contents of the d_buf buffer.
+ *
+ * Returned Value:
+ *   The TCP checksum of the TCP segment in d_buf and pointed to by
+ *   d_appdata.
+ *
+ ****************************************************************************/
+
+uint16_t tcp_chksum(FAR struct net_driver_s *dev);
+
+/****************************************************************************
+ * Name: udp_chksum
+ *
+ * Description:
+ *   Calculate the UDP checksum of the packet in d_buf and d_appdata.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_NET_UDP_CHECKSUMS
+uint16_t udp_chksum(FAR struct net_driver_s *dev);
+#endif
+
+/****************************************************************************
+ * Name: icmp_chksum
+ *
+ * Description:
+ *   Calculate the checksum of the ICMP message
+ *
+ ****************************************************************************/
+
+uint16_t icmp_chksum(FAR struct net_driver_s *dev, int len);
+
 #undef EXTERN
 #ifdef __cplusplus
 }