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| author | FWoltermann@gmail.com <FWoltermann@gmail.com@076cb2c4-205e-83fd-5cf3-1be9aa105544> | 2011-12-08 14:53:40 +0000 |
|---|---|---|
| committer | FWoltermann@gmail.com <FWoltermann@gmail.com@076cb2c4-205e-83fd-5cf3-1be9aa105544> | 2011-12-08 14:53:40 +0000 |
| commit | e33e19d0587146859d48a134ec9fd94e7b7ba5cd (patch) | |
| tree | 69d048c8801858d2756ab3a487090a7a1b74bf14 /NetEx/NetGram.h | |
| download | starshatter-e33e19d0587146859d48a134ec9fd94e7b7ba5cd.zip starshatter-e33e19d0587146859d48a134ec9fd94e7b7ba5cd.tar.gz starshatter-e33e19d0587146859d48a134ec9fd94e7b7ba5cd.tar.bz2 | |
Initial upload
Diffstat (limited to 'NetEx/NetGram.h')
| -rw-r--r-- | NetEx/NetGram.h | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/NetEx/NetGram.h b/NetEx/NetGram.h new file mode 100644 index 0000000..e836e8d --- /dev/null +++ b/NetEx/NetGram.h @@ -0,0 +1,79 @@ +/* Project nGenEx
+ Destroyer Studios LLC
+ Copyright © 1997-2004. All Rights Reserved.
+
+ SUBSYSTEM: NetEx.lib
+ FILE: NetGram.h
+ AUTHOR: John DiCamillo
+
+
+ OVERVIEW
+ ========
+ Datagram (UDP) packet that implements the basic
+ packet-oriented network protocol.
+*/
+
+
+#ifndef NetGram_h
+#define NetGram_h
+
+#include <windows.h>
+#include "NetAddr.h"
+#include "Text.h"
+
+// +-------------------------------------------------------------------+
+
+const int NET_GRAM_ACK = 0x80000000;
+const int NET_GRAM_RELIABLE = 0x40000000;
+const int NET_GRAM_SEQ_MASK = 0x3fffffff;
+
+const int NET_GRAM_HEADER_SIZE = 4;
+const int NET_GRAM_MAX_SIZE = 1024;
+
+// +-------------------------------------------------------------------+
+
+class NetGram
+{
+public:
+ static const char* TYPENAME() { return "NetGram"; }
+
+ // for receiving packets from remote hosts:
+ NetGram(const NetAddr& src, Text msg);
+
+ // for composing packets to send to remote hosts:
+ NetGram(const NetAddr& dst, Text user_data, int retries);
+
+ int operator == (const NetGram& g) const { return packet_id == g.packet_id &&
+ addr == g.addr; }
+ int operator < (const NetGram& g) const { return Sequence() < g.Sequence(); }
+
+ DWORD PacketID() const { return packet_id; }
+ DWORD Sequence() const { return packet_id & NET_GRAM_SEQ_MASK; }
+ DWORD SendTime() const { return send_time; }
+ BYTE* Data() const { return (BYTE*) body.data(); }
+ BYTE* UserData() const { return (BYTE*) body.data() + NET_GRAM_HEADER_SIZE; }
+ int Size() const { return body.length(); }
+ const Text& Body() const { return body; }
+ const NetAddr& Address() const { return addr; }
+
+ bool IsAck() const { return packet_id & NET_GRAM_ACK ? true : false; }
+ bool IsReliable() const { return packet_id & NET_GRAM_RELIABLE ? true : false; }
+ int Retries() const { return retries; }
+
+ void Retry();
+ NetGram Ack();
+ void ClearAck() { packet_id &= ~NET_GRAM_ACK; }
+
+protected:
+ NetGram();
+
+ NetAddr addr; // network address of remote host
+ int retries; // number of retries remaining (reliable packets only)
+ DWORD send_time; // time in msec of most recent send attempt
+
+ DWORD packet_id; // copy of packet id from header in body
+ Text body; // header plus user data
+};
+
+
+#endif NetGram_h
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