/*
- * Copyright (c) 2013 Cisco Systems, Inc. and others. All rights reserved.
+ * Copyright (c) 2013-2014 Cisco Systems, Inc. and others. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 which accompanies this distribution,
return this;
}
+ /**
+ * Returns the type field of the current ICMP packet
+ *
+ * @return The type code of the current ICMP packet
+ */
+ public byte getType() {
+ return BitBufferHelper.getByte(fieldValues.get(TYPE));
+ }
+
/**
* Sets the ICMP code (type subtype) for the current ICMP object instance
*
return this;
}
+ /**
+ * Gets the ICMP code (type subtype) for the current ICMP object instance
+ *
+ * @return The ICMP message type subtype
+ */
+ public byte getCode() {
+ return BitBufferHelper.getByte(fieldValues.get(CODE));
+ }
+
/**
* Sets the ICMP checksum for the current ICMP object instance
* @param short - checksum
}
/**
- * Sets the ICMP identifier for the current ICMP object instance
+ * Sets the ICMP identifier for the current ICMP object instance
* @param short - identifier
* @return ICMP
*/
return this;
}
+ /**
+ * Gets the ICMP identifier of the current ICMP object instance
+ *
+ * @return short - identifier
+ */
+
+ public short getIdentifier() {
+ return BitBufferHelper.getShort(fieldValues.get(IDENTIFIER));
+ }
+
/**
* Sets the ICMP sequence number for the current ICMP object instance
* @param short - seqNumber
return this;
}
+ /**
+ * Gets the ICMP sequence number of the current ICMP object instance
+ *
+ * @return short - seqNumber
+ */
+
+ public short getSequenceNumber() {
+ return BitBufferHelper.getShort(fieldValues.get(SEQNUMBER));
+ }
+
/**
* Gets the header size in bits
* @return The ICMP header size in bits
end += rawPayload.length;
}
int checksumStartByte = start + getfieldOffset(CHECKSUM) / NetUtils.NumBitsInAByte;
+ int even = end & ~1;
- for (int i = start; i <= (end - 1); i = i + 2) {
+ for (int i = start; i < even; i = i + 2) {
// Skip, if the current bytes are checkSum bytes
if (i == checksumStartByte) {
continue;
wordData = ((data[i] << 8) & 0xFF00) + (data[i + 1] & 0xFF);
sum = sum + wordData;
}
- carry = (sum >> 16) & 0xFF;
+ if (even < end) {
+ // Add the last octet with zero padding.
+ wordData = (data[even] << 8) & 0xFF00;
+ sum = sum + wordData;
+ }
+
+ carry = sum >>> 16;
finalSum = (sum & 0xFFFF) + carry;
return (short) ~((short) finalSum & 0xFFFF);
}