Add the capability to iterate through the packets in a pktfifo,

[gem5.git] / dev / etherpkt.hh

diff --git a/dev/etherpkt.hh b/dev/etherpkt.hh
index abdf301663216d69de3be99865e7df2aa4a713f8..cb9022d7256d108d424819fa3764576d5de6e90f 100644 (file)
--- a/dev/etherpkt.hh
+++ b/dev/etherpkt.hh
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2002-2004 The Regents of The University of Michigan
+ * Copyright (c) 2002-2005 The Regents of The University of Michigan
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -37,70 +37,48 @@
 #include <memory>
 #include <assert.h>
 
-#include "sim/host.hh"
 #include "base/refcnt.hh"
-#include "base/inet_hdrs.hh"
+#include "sim/host.hh"
 
-class Checkpoint;
 /*
  * Reference counted class containing ethernet packet data
  */
-class EtherPacket : public RefCounted
+class Checkpoint;
+class PacketData : public RefCounted
 {
   public:
+    /*
+     * Pointer to packet data will be deleted
+     */
     uint8_t *data;
+
+    /*
+     * Length of the current packet
+     */
     int length;
 
-  public:
-    EtherPacket() : data(NULL), length(0) {}
-    EtherPacket(std::auto_ptr<uint8_t> d, int l)
-        : data(d.release()), length(l) {}
-    ~EtherPacket() { if (data) delete [] data; }
+    /*
+     * Extra space taken up by the packet in whatever data structure
+     * it is in.
+     *
+     * NOTE: This can only be use by *one* data structure at a time!
+     */
+    int slack;
 
   public:
-    bool IsUnicast() { return data[0] == 0x00; }
-    bool IsMulticast() { return data[0] == 0x01; }
-    bool IsBroadcast() { return data[0] == 0xff; }
+    PacketData() : data(NULL), length(0), slack(0) { }
+    explicit PacketData(size_t size)
+        : data(new uint8_t[size]), length(0), slack(0) { }
+    PacketData(std::auto_ptr<uint8_t> d, int l, int s = 0)
+        : data(d.release()), length(l), slack(s) { }
+    ~PacketData() { if (data) delete [] data; }
 
-    bool isIpPkt() {
-        eth_header *eth = (eth_header *) data;
-        return (eth->type == 0x8);
-    }
-    bool isTcpPkt(ip_header *ip) {
-        return (ip->protocol == 0x6);
-    }
-    bool isTcpPkt() {
-        ip_header *ip = getIpHdr();
-        return (ip->protocol == 0x6);
-    }
-    bool isUdpPkt(ip_header *ip) {
-        return (ip->protocol == 17);
-    }
-    bool isUdpPkt() {
-        ip_header *ip = getIpHdr();
-        return (ip->protocol == 17);
-    }
-
-    ip_header *getIpHdr() {
-        assert(isIpPkt());
-        return (ip_header *) (data + sizeof(eth_header));
-    }
-
-    tcp_header *getTcpHdr(ip_header *ip) {
-        assert(isTcpPkt(ip));
-        return (tcp_header *) ((uint8_t *) ip + (ip->vers_len & 0xf)*4);
-    }
-
-    udp_header *getUdpHdr(ip_header *ip) {
-        assert(isUdpPkt(ip));
-        return (udp_header *) ((uint8_t *) ip + (ip->vers_len & 0xf)*4);
-    }
-    typedef RefCountingPtr<EtherPacket> PacketPtr;
-
-    void serialize(std::ostream &os);
-    void unserialize(Checkpoint *cp, const std::string &section);
+  public:
+    void serialize(const std::string &base, std::ostream &os);
+    void unserialize(const std::string &base, Checkpoint *cp,
+                     const std::string &section);
 };
 
-typedef RefCountingPtr<EtherPacket> PacketPtr;
+typedef RefCountingPtr<PacketData> PacketPtr;
 
 #endif // __ETHERPKT_HH__