qcacmn: Add qdf packet check of IP fragment frames

Add qdf packet check of IPv4 fragment frames

CRs-Fixed: 3647009
Change-Id: Ib7194cb2a3b541be40301243e5e64b70b4a01257

qdf/linux/src/i_qdf_nbuf.h

@@ -1235,6 +1235,17 @@ void __qdf_nbuf_data_set_ipv6_tc(uint8_t *data, uint8_t tc);
  */
 bool __qdf_nbuf_is_ipv4_last_fragment(struct sk_buff *skb);
 
+/**
+ * __qdf_nbuf_is_ipv4_fragment() - Check if IPv4 packet is fragment
+ * @skb: Buffer
+ *
+ * This function checks IPv4 packet is fragment or not.
+ * Caller has to call this function for IPv4 packets only.
+ *
+ * Return: True if IPv4 packet is fragment otherwise false
+ */
+bool __qdf_nbuf_is_ipv4_fragment(struct sk_buff *skb);
+
 bool __qdf_nbuf_is_ipv4_v6_pure_tcp_ack(struct sk_buff *skb);
 
 #ifdef QDF_NBUF_GLOBAL_COUNT

qdf/linux/src/qdf_nbuf.c

@@ -1788,6 +1788,15 @@ __qdf_nbuf_is_ipv4_last_fragment(struct sk_buff *skb)
 	return false;
 }
 
+bool
+__qdf_nbuf_is_ipv4_fragment(struct sk_buff *skb)
+{
+	if (ntohs(ip_hdr(skb)->frag_off) & IP_MF)
+		return true;
+
+	return false;
+}
+
 void
 __qdf_nbuf_data_set_ipv4_tos(uint8_t *data, uint8_t tos)
 {