1 files changed, 48 insertions, 33 deletions
diff --git a/helper/include/odp/helper/chksum.h b/helper/include/odp/helper/chksum.h
index 520e92753..f9b3f2dc2 100644
--- a/helper/include/odp/helper/chksum.h
+++ b/helper/include/odp/helper/chksum.h
@@ -1,7 +1,5 @@
-/* Copyright (c) 2014, Linaro Limited
- * All rights reserved.
- *
- * SPDX-License-Identifier:     BSD-3-Clause
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright (c) 2014-2018 Linaro Limited
  */
 
 /**
@@ -18,8 +16,10 @@ extern "C" {
 
 #include <odp_api.h>
 
-/** @addtogroup odph_chksum ODPH CHECK SUM
- *  @{
+/** @defgroup odph_chksum ODPH CHECKSUM
+ * TCP/UDP/SCTP checksum
+ *
+ * @{
  */
 
 /**
@@ -35,33 +35,6 @@ typedef enum {
 } odph_chksum_op_t;
 
 /**
- * Checksum
- *
- * @param buffer calculate chksum for buffer
- * @param len    buffer length
- *
- * @return checksum value in host cpu order
- */
-static inline odp_u16sum_t odph_chksum(void *buffer, int len)
-{
-	uint16_t *buf = (uint16_t *)buffer;
-	uint32_t sum = 0;
-	uint16_t result;
-
-	for (sum = 0; len > 1; len -= 2)
-		sum += *buf++;
-
-	if (len == 1)
-		sum += *(unsigned char *)buf;
-
-	sum = (sum >> 16) + (sum & 0xFFFF);
-	sum += (sum >> 16);
-	result = ~sum;
-
-	return  (__odp_force odp_u16sum_t) result;
-}
-
-/**
  * General Purpose TCP/UDP checksum function
  *
  * This function handles all the different checksum operations like
@@ -217,6 +190,48 @@ static inline int odph_udp_chksum_verify(odp_packet_t odp_pkt)
 }
 
 /**
+ * Generate SCTP checksum
+ *
+ * This function supports SCTP over either IPv4 or IPV6 - including handling
+ * any IPv4 header options and any IPv6 extension headers.  However it
+ * does not handle tunneled pkts (i.e. any case where there is more than
+ * one IPv4/IPv6 header).
+ * This function also handles non-contiguous pkts.  In particular it can
+ * handle arbitrary packet segmentation, including cases where the segments
+ * are not 2 byte aligned, nor have a length that is a multiple of 2.  This
+ * function also can handle jumbo frames (at least up to 10K).
+ *
+ * This function will insert the calculated CRC32-c checksum into the proper
+ * location in the SCTP header.
+ *
+ * @param  odp_pkt     Calculate and insert chksum for this SCTP pkt, which can
+ *                     be over IPv4 or IPv6.
+ * @retval 0 on success
+ * @retval <0 on failure
+ */
+int odph_sctp_chksum_set(odp_packet_t odp_pkt);
+
+/**
+ * Verify SCTP checksum
+ *
+ * This function supports SCTP over either IPv4 or IPV6 - including handling
+ * any IPv4 header options and any IPv6 extension headers.  However it
+ * does not handle tunneled pkts (i.e. any case where there is more than
+ * one IPv4/IPv6 header).
+ * This function also handles non-contiguous pkts.  In particular it can
+ * handle arbitrary packet segmentation, including cases where the segments
+ * are not 2 byte aligned, nor have a length that is a multiple of 2.  This
+ * function also can handle jumbo frames (at least up to 10K).
+ *
+ * @param  odp_pkt     Calculate and compare the chksum for this SCTP pkt,
+ *                     which can be over IPv4 or IPv6.
+ * @retval <0 on failure
+ * @retval 0 if the incoming chksum field is correct
+ * @retval 2 when the chksum field is incorrect
+ */
+int odph_sctp_chksum_verify(odp_packet_t odp_pkt);
+
+/**
  * @}
  */