1/*lint -save -library Flexelint comment for external headers */
2
3/*
4 Alias.h defines the outside world interfaces for the packet
5 aliasing software.
6
7 This software is placed into the public domain with no restrictions
8 on its distribution.
9*/
10
11
12#ifndef _ALIAS_H_
13#define _ALIAS_H_
14
| 1/*lint -save -library Flexelint comment for external headers */
2
3/*
4 Alias.h defines the outside world interfaces for the packet
5 aliasing software.
6
7 This software is placed into the public domain with no restrictions
8 on its distribution.
9*/
10
11
12#ifndef _ALIAS_H_
13#define _ALIAS_H_
14
|
15/* Alias link representativei (incomplete struct) */
| 15#ifndef NULL
16#define NULL 0
17#endif
18
19/* Alias link representative (incomplete struct) */
|
16struct alias_link;
17
18/* External interfaces (API) to packet aliasing engine */
| 20struct alias_link;
21
22/* External interfaces (API) to packet aliasing engine */
|
| 23
24/* Initialization and Control */
25 extern void
26 PacketAliasInit(void);
27
28 extern void
29 PacketAliasSetAddress(struct in_addr);
30
31 extern unsigned int
32 PacketAliasSetMode(unsigned int, unsigned int);
33
34/* Packet Handling */
35 extern int
36 PacketAliasIn(char *, int maxpacketsize);
37
38 extern int
39 PacketAliasOut(char *, int maxpacketsize);
40
41/* Port and Address Redirection */
42 extern struct alias_link *
43 PacketAliasRedirectPort(struct in_addr, u_short,
44 struct in_addr, u_short,
45 struct in_addr, u_short,
46 u_char);
47
48 extern struct alias_link *
49 PacketAliasRedirectAddr(struct in_addr,
50 struct in_addr);
51
52 extern void
53 PacketAliasRedirectDelete(struct alias_link *);
54
55/* Fragment Handling */
56 extern int
57 PacketAliasSaveFragment(char *);
58
59 extern char *
60 PacketAliasGetFragment(char *);
61
62 extern void
63 PacketAliasFragmentIn(char *, char *);
64
65/* Miscellaneous Functions */
66 extern u_short
67 PacketAliasInternetChecksum(u_short *, int);
68
69
70/*
71 In version 2.2, the function names were rationalized
72 to all be of the form PacketAlias... These are the
73 old function names for backwards compatibility
74*/
|
19extern int SaveFragmentPtr(char *);
20extern char *GetNextFragmentPtr(char *);
21extern void FragmentAliasIn(char *, char *);
| 75extern int SaveFragmentPtr(char *);
76extern char *GetNextFragmentPtr(char *);
77extern void FragmentAliasIn(char *, char *);
|
22extern int PacketAliasIn(char *, int maxpacketsize);
23extern int PacketAliasOut(char *, int maxpacketsize);
24extern int PacketAliasIn2(char *, struct in_addr, int maxpacketsize);
25extern int PacketAliasOut2(char *, struct in_addr, int maxpacketsize);
| |
26extern void SetPacketAliasAddress(struct in_addr);
27extern void InitPacketAlias(void);
| 78extern void SetPacketAliasAddress(struct in_addr);
79extern void InitPacketAlias(void);
|
28extern void InitPacketAliasLog(void);
29extern void UninitPacketAliasLog(void);
| |
30extern unsigned int SetPacketAliasMode(unsigned int, unsigned int);
| 80extern unsigned int SetPacketAliasMode(unsigned int, unsigned int);
|
31extern struct alias_link *
32PacketAliasRedirectPort(struct in_addr, u_short,
33 struct in_addr, u_short,
34 struct in_addr, u_short,
35 u_char);
| 81extern int PacketAliasIn2(char *, struct in_addr, int maxpacketsize);
82extern int PacketAliasOut2(char *, struct in_addr, int maxpacketsize);
|
36extern int
37PacketAliasPermanentLink(struct in_addr, u_short,
38 struct in_addr, u_short,
39 u_short, u_char);
| 83extern int
84PacketAliasPermanentLink(struct in_addr, u_short,
85 struct in_addr, u_short,
86 u_short, u_char);
|
40extern struct alias_link *
41PacketAliasRedirectAddr(struct in_addr,
42 struct in_addr);
43void PacketAliasRedirectDelete(struct alias_link *);
44
45
46/* InternetChecksum() is not specifically part of the
47 packet aliasing API, but is sometimes needed outside
48 the module. (~for instance, natd uses it to create
49 an ICMP error message when interface size is
50 exceeded.) */
51
| |
52extern u_short InternetChecksum(u_short *, int);
53
| 87extern u_short InternetChecksum(u_short *, int);
88
|
| 89/* Obsolete constant */
90#define PKT_ALIAS_NEW_LINK 5
|
54
55/********************** Mode flags ********************/
56/* Set these flags using SetPacketAliasMode() */
57
58/* If PKT_ALIAS_LOG is set, a message will be printed to
59 /var/log/alias.log every time a link is created or deleted. This
60 is useful for debugging */
| 91
92/********************** Mode flags ********************/
93/* Set these flags using SetPacketAliasMode() */
94
95/* If PKT_ALIAS_LOG is set, a message will be printed to
96 /var/log/alias.log every time a link is created or deleted. This
97 is useful for debugging */
|
61#define PKT_ALIAS_LOG 1
| 98#define PKT_ALIAS_LOG 0x01
|
62
63/* If PKT_ALIAS_DENY_INCOMING is set, then incoming connections (e.g.
64 to ftp, telnet or web servers will be prevented by the aliasing
65 mechanism. */
| 99
100/* If PKT_ALIAS_DENY_INCOMING is set, then incoming connections (e.g.
101 to ftp, telnet or web servers will be prevented by the aliasing
102 mechanism. */
|
66#define PKT_ALIAS_DENY_INCOMING 2
| 103#define PKT_ALIAS_DENY_INCOMING 0x02
|
67
68/* If PKT_ALIAS_SAME_PORTS is set, packets will be attempted sent from
| 104
105/* If PKT_ALIAS_SAME_PORTS is set, packets will be attempted sent from
|
69 the same port as they originated on. This allow eg rsh to work
| 106 the same port as they originated on. This allows eg rsh to work
|
70 *99% of the time*, but _not_ 100%. (It will be slightly flakey
| 107 *99% of the time*, but _not_ 100%. (It will be slightly flakey
|
71 instead of not working at all.) */
72#define PKT_ALIAS_SAME_PORTS 4
| 108 instead of not working at all.) This mode bit is set by
109 PacketAliasInit(), so it is a default mode of operation. */
110#define PKT_ALIAS_SAME_PORTS 0x04
|
73
74/* If PKT_ALIAS_USE_SOCKETS is set, then when partially specified
75 links (e.g. destination port and/or address is zero), the packet
76 aliasing engine will attempt to allocate a socket for the aliasing
77 port it chooses. This will avoid interference with the host
| 111
112/* If PKT_ALIAS_USE_SOCKETS is set, then when partially specified
113 links (e.g. destination port and/or address is zero), the packet
114 aliasing engine will attempt to allocate a socket for the aliasing
115 port it chooses. This will avoid interference with the host
|
78 machine. Fully specified links do not require this. */
79#define PKT_ALIAS_USE_SOCKETS 8
| 116 machine. Fully specified links do not require this. This bit
117 is set after a call to PacketAliasInit(), so it is a default
118 mode of operation.*/
119#define PKT_ALIAS_USE_SOCKETS 0x08
|
80
81/* If PKT_ALIAS_UNREGISTERED_ONLY is set, then only packets with with
82 unregistered source addresses will be aliased (along with those
83 of the ppp host maching itself. Private addresses are those
84 in the following ranges:
85
86 10.0.0.0 -> 10.255.255.255
87 172.16.0.0 -> 172.31.255.255
88 192.168.0.0 -> 192.168.255.255 */
| 120
121/* If PKT_ALIAS_UNREGISTERED_ONLY is set, then only packets with with
122 unregistered source addresses will be aliased (along with those
123 of the ppp host maching itself. Private addresses are those
124 in the following ranges:
125
126 10.0.0.0 -> 10.255.255.255
127 172.16.0.0 -> 172.31.255.255
128 192.168.0.0 -> 192.168.255.255 */
|
89#define PKT_ALIAS_UNREGISTERED_ONLY 16
| 129#define PKT_ALIAS_UNREGISTERED_ONLY 0x10
|
90
| 130
|
| 131/* If PKT_ALIAS_RESET_ON_ADDR_CHANGE is set, then the table of dynamic
132 aliasing links will be reset whenever PacketAliasSetAddress()
133 changes the default aliasing address. If the default aliasing
134 address is left unchanged by this functions call, then the
135 table of dynamic aliasing links will be left intact. This
136 bit is set after a call to PacketAliasInit(). */
137#define PKT_ALIAS_RESET_ON_ADDR_CHANGE 0x20
|
91
| 138
|
92
| |
93/* Return Codes */
94#define PKT_ALIAS_ERROR -1
95#define PKT_ALIAS_OK 1
96#define PKT_ALIAS_IGNORED 2
97#define PKT_ALIAS_UNRESOLVED_FRAGMENT 3
98#define PKT_ALIAS_FOUND_HEADER_FRAGMENT 4
| 139/* Return Codes */
140#define PKT_ALIAS_ERROR -1
141#define PKT_ALIAS_OK 1
142#define PKT_ALIAS_IGNORED 2
143#define PKT_ALIAS_UNRESOLVED_FRAGMENT 3
144#define PKT_ALIAS_FOUND_HEADER_FRAGMENT 4
|
99#define PKT_ALIAS_NEW_LINK 5
| |
100
101#endif
102/*lint -restore */
| 145
146#endif
147/*lint -restore */
|