diff --git a/arp_packet.cc b/arp_packet.cc
index cf0c129..ae14ac6 100644
--- a/arp_packet.cc
+++ b/arp_packet.cc
@@ -16,7 +16,8 @@
 const size_t ArpPacket::kMinPayloadSize = ETH_ZLEN - ETH_HLEN;
 
 ArpPacket::ArpPacket()
-    : local_ip_address_(IPAddress::kFamilyUnknown),
+    : operation_(0),
+      local_ip_address_(IPAddress::kFamilyUnknown),
       remote_ip_address_(IPAddress::kFamilyUnknown) {}
 
 ArpPacket::ArpPacket(
@@ -49,7 +50,7 @@
 // +-----------------------------------------------------------------------+
 // | Target IP Address (of length "Protocol Length")...                    |
 // +-----------------------------------------------------------------------+
-bool ArpPacket::ParseReply(const ByteString &packet) {
+bool ArpPacket::Parse(const ByteString &packet) {
   arphdr header;
   if (packet.GetLength() < sizeof(header)) {
     LOG(ERROR) << "Packet size " << packet.GetLength()
@@ -89,8 +90,8 @@
     return false;
   }
   const uint16_t operation = ntohs(header.ar_op);
-  if (operation != ARPOP_REPLY) {
-    NOTIMPLEMENTED() << "Packet is not an ARP reply but of type "
+  if (operation != ARPOP_REPLY && operation != ARPOP_REQUEST) {
+    NOTIMPLEMENTED() << "Packet is not an ARP reply or request but of type "
                      << operation;
     return false;
   }
@@ -104,6 +105,7 @@
                      << min_packet_size;
     return false;
   }
+  operation_ = operation;
   local_mac_address_ = packet.GetSubstring(sizeof(header), ETH_ALEN);
   local_ip_address_ = IPAddress(family, packet.GetSubstring(
       sizeof(header) + ETH_ALEN, ip_address_length));
@@ -166,4 +168,8 @@
   return true;
 }
 
+bool ArpPacket::IsReply() const {
+  return operation_ == ARPOP_REPLY;
+}
+
 }  // namespace shill