qcacmn: Check ICMPV4 and ICMV6 are redirect or not

Add API to check ICMPV4 and ICMPV6 are redirect or not
This is to avoid a security breach.

Change-Id: I61e7c54c6d9279c1e7d2f316381fbc1c83ce5b4a
CRs-Fixed: 3233925

qdf/linux/src/qdf_nbuf.c

@@ -2077,6 +2077,33 @@ bool __qdf_nbuf_data_is_icmpv4_rsp(uint8_t *data)
 	return false;
 }
 
+bool __qdf_nbuf_data_is_icmpv4_redirect(uint8_t *data)
+{
+	uint8_t op_code;
+
+	op_code = (uint8_t)(*(uint8_t *)(data +
+				QDF_NBUF_PKT_ICMPv4_OPCODE_OFFSET));
+
+	if (op_code == QDF_NBUF_PKT_ICMPV4_REDIRECT)
+		return true;
+	return false;
+}
+
+qdf_export_symbol(__qdf_nbuf_data_is_icmpv4_redirect);
+
+bool __qdf_nbuf_data_is_icmpv6_redirect(uint8_t *data)
+{
+	uint8_t subtype;
+
+	subtype = (uint8_t)(*(uint8_t *)(data + ICMPV6_SUBTYPE_OFFSET));
+
+	if (subtype == ICMPV6_REDIRECT)
+		return true;
+	return false;
+}
+
+qdf_export_symbol(__qdf_nbuf_data_is_icmpv6_redirect);
+
 /**
  * __qdf_nbuf_data_get_icmpv4_src_ip() - get icmpv4 src IP
  * @data: Pointer to network data buffer
@@ -2311,6 +2338,8 @@ bool __qdf_nbuf_data_is_icmpv6_pkt(uint8_t *data)
 		return false;
 }
 
+qdf_export_symbol(__qdf_nbuf_data_is_icmpv6_pkt);
+
 /**
  * __qdf_nbuf_data_is_ipv4_udp_pkt() - check if it is IPV4 UDP packet.
  * @data: Pointer to IPV4 UDP packet data buffer