HISTORY revision 44307 
1Version 1.0: August 11, 1996 (cjm)
2
3Version 1.1:  August 20, 1996  (cjm)
4    - Host accepts incoming connections for ports 0 to 1023.
5
6Version 1.2:  September 7, 1996 (cjm)
7    - Fragment handling error in alias_db.c corrected.
8
9Version 1.3:  September 15, 1996 (cjm)
10    - Generalized mechanism for handling incoming
11      connections (no more 0 to 1023 restriction).
12
13    - Increased ICMP support (will handle traceroute now).
14
15    - Improved TCP close connection logic.
16
17Version 1.4: September 16, 1996 (cjm)
18
19Version 1.5: September 17, 1996 (cjm)
20    - Corrected error in handling incoming UDP packets
21      with zero checksum.
22
23Version 1.6: September 18, 1996
24    - Simplified ICMP data storage.  Will now handle
25      tracert from Win95 and NT as well as FreeBSD
26      traceroute, which uses UDP packets to non-existent
27      ports.
28
29Verstion 1.7: January 9, 1997 (cjm)
30    - Reduced malloc() activity for ICMP echo and
31      timestamp requests.
32
33    - Added handling for out-of-order IP fragments.
34
35    - Switched to differential checksum computation
36      for IP headers (TCP, UDP and ICMP checksums
37      were already differential).
38
39    - Accepts FTP data connections from other than
40      port 20.  This allows one ftp connections
41      from two hosts which are both running packet
42      aliasing.
43
44    - Checksum error on FTP transfers.  Problem
45      in code located by Martin Renters and
46      Brian Somers.
47
48Version 1.8: January 14, 1997 (cjm)
49    - Fixed data type error in function StartPoint()
50      in alias_db.c (this bug did not exist before v1.7)
51      Problem in code located by Ari Suutari.
52
53Version 1.9: February 1, 1997 (Eivind Eklund <perhaps@yes.no>)
54    - Added support for IRC DCC (ee)
55
56    - Changed the aliasing routines to use ANSI style
57      throughout (ee)
58
59    - Minor API changes for integration with other
60      programs than PPP (ee)
61
62    - Fixed minor security hole in alias_ftp.c for
63      other applications of the aliasing software.
64      Hole could _not_ manifest in ppp+pktAlias, but
65      could potentially manifest in other applications
66      of the aliasing. (ee)
67
68    - Connections initiated from packet aliasing
69      host machine will not have their port number
70      aliased unless it conflicts with an aliasing
71      port already being used. (There is an option
72      to disable this for debugging) (cjm)
73
74    - Sockets will be allocated in cases where
75      there might be port interference with the
76      host machine.  This can be disabled in cases
77      where the ppp host will be acting purely as a
78      masquerading router and not generate any
79      traffic of its own.
80      (cjm)
81
82Version 2.0: March, 1997 (cjm)
83    - Aliasing links are cleared only when a host interface address
84      changes.
85
86    - PacketAliasPermanentLink() API added.
87
88    - Option for only aliasing private, unregistered
89      IP addresses added.
90
91    - Substantial rework to the aliasing lookup engine.
92
93Version 2.1: May, 1997 (cjm)
94    - Continuing rework to the aliasing lookup engine
95      to support multiple incoming addresses and static
96      NAT.  PacketAliasRedirectPort() and
97      PacketAliasRedirectAddr() added to API.
98
99    - Now supports outgoing as well as incoming ICMP
100      error messges.
101
102Version 2.2: July, 1997 (cjm)
103    - Rationalized API function names to all begin with
104      "PacketAlias..."  Old function names are retained
105      for backwards compatitibility.
106
107    - Packet aliasing engine will now free memory of
108      fragments which are never resolved after a timeout
109      period.  Once a fragment is resolved, it becomes
110      the users responsibility to free the memory.
111
112Version 2.3: August 11, 1997 (cjm)
113    - Problem associated with socket file descriptor
114      accumulation in alias_db.c corrected.  The sockets
115      had to be closed when a binding failed.  Problem 
116      in code located by Gordon Burditt.
117
118Version 2.4: September 1, 1997 (cjm)
119    - PKT_ALIAS_UNREGISTERED_ONLY option repaired.
120      This part of the code was incorrectly re-implemented
121      in version 2.1.
122
123Version 2.5: December, 1997 (ee)
124    - Added PKT_ALIAS_PUNCH_FW mode for firewall
125      bypass of FTP/IRC DCC data connections.  Also added
126      improved TCP connection monitoring.
127
128Version 2.6: May, 1998 (amurai)
129    - Added supporting routine for NetBios over TCP/IP.
130
131Version 3.0: January 1, 1999
132    - Transparent proxying support added.
133    - PPTP redirecting support added based on patches
134      contributed by Dru Nelson <dnelson@redwoodsoft.com>.
135