1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
|
/*
VTun - Virtual Tunnel over TCP/IP network.
Copyright (C) 1998-2016 Maxim Krasnyansky <max_mk@yahoo.com>
VTun has been derived from VPPP package by Maxim Krasnyansky.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
*/
/*
* $Id: linkfd.h,v 1.4.2.4 2016/10/01 21:37:39 mtbishop Exp $
*/
#ifndef _LINKFD_H
#define _LINKFD_H
/* Priority of the process in the link_fd function */
/* Never set the priority to -19 without stating a good reason.
*#define LINKFD_PRIO -19
* Since the likely intent was just to give vtun an edge,
* -1 will do nicely.
*/
#define LINKFD_PRIO -1
/* Frame alloc/free */
#define LINKFD_FRAME_RESERV 128
#define LINKFD_FRAME_APPEND 64
static inline void * lfd_alloc(size_t size)
{
register char * buf;
size += LINKFD_FRAME_RESERV + LINKFD_FRAME_APPEND;
if( !(buf = malloc(size)) )
return NULL;
return buf+LINKFD_FRAME_RESERV;
}
static inline void * lfd_realloc(void *buf, size_t size)
{
unsigned char *ptr = buf;
ptr -= LINKFD_FRAME_RESERV;
size += LINKFD_FRAME_RESERV;
if( !(ptr = realloc(ptr, size)) )
return NULL;
return ptr+LINKFD_FRAME_RESERV;
}
static inline void lfd_free(void *buf)
{
unsigned char *ptr = buf;
free(ptr-LINKFD_FRAME_RESERV);
}
int linkfd(struct vtun_host *host);
/* Module */
struct lfd_mod {
char *name;
int (*alloc)(struct vtun_host *host);
int (*encode)(int len, char *in, char **out);
int (*avail_encode)(void);
int (*decode)(int len, char *in, char **out);
int (*avail_decode)(void);
int (*free)(void);
struct lfd_mod *next;
struct lfd_mod *prev;
};
/* External LINKFD modules */
extern struct lfd_mod lfd_zlib;
extern struct lfd_mod lfd_lzo;
extern struct lfd_mod lfd_encrypt;
extern struct lfd_mod lfd_legacy_encrypt;
extern struct lfd_mod lfd_shaper;
#endif
|
