Commit | Line | Data |
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1fb3cba0 | 1 | /* |
f0e54a99 | 2 | * Encrypting tunnel for userv-ipif tunnels, header file |
3 | */ | |
4 | /* | |
c07be359 | 5 | * Copyright (C) 2000,2003 Ian Jackson |
6 | * This file is part of ipif, part of userv-utils | |
f0e54a99 | 7 | * |
8 | * This is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with userv-utils; if not, write to the Free Software | |
20 | * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
1fb3cba0 | 21 | */ |
22 | ||
23 | #ifndef MECHS_H | |
24 | #define MECHS_H | |
25 | ||
26 | #include <stdio.h> | |
27 | #include <time.h> | |
dea61a77 | 28 | #include <string.h> |
f9e59051 | 29 | #include <sys/utsname.h> |
1fb3cba0 | 30 | |
1fb3cba0 | 31 | struct buffer { |
32 | unsigned char *base; | |
33 | unsigned char *start; | |
34 | size_t size; | |
35 | }; | |
36 | ||
37 | struct mechdata; | |
38 | ||
39 | typedef void mes_functype(struct mechdata **md_r, int *maxprefix_io, int *maxsuffix_io); | |
40 | typedef void mds_functype(struct mechdata **md_r); | |
41 | ||
42 | typedef void menc_functype(struct mechdata *md, struct buffer*); | |
43 | typedef const char *mdec_functype(struct mechdata *md, struct buffer*); | |
44 | ||
45 | struct mechanism { | |
46 | const char *name; | |
47 | mes_functype *encsetup; | |
48 | mds_functype *decsetup; | |
49 | menc_functype *encode; | |
50 | mdec_functype *decode; | |
51 | }; | |
52 | ||
d09170cc IJ |
53 | #include "automech.h" |
54 | ||
1fb3cba0 | 55 | extern const struct mechanism *const mechanismlists[]; |
56 | ||
57 | /* setup function may call getarg_xxx functions and then | |
58 | * reads/writes key material to/from fd | |
59 | * | |
60 | * setup_in function may increase maxprefix and maxsuffix | |
61 | * code functions modify buffer in place | |
f0e54a99 | 62 | * decode function returns 0 meaning packet decoded ok, |
63 | * "" meaning discard it quietly, or message to print for verbose discard | |
1fb3cba0 | 64 | */ |
65 | ||
66 | const char *getarg_string(void); | |
67 | unsigned long getarg_ulong(void); | |
68 | ||
f9e59051 | 69 | #define PROGRAM "udptunnel-forwarder" |
1fb3cba0 | 70 | extern char programid[]; |
71 | ||
72 | void *buf_append(struct buffer *buf, size_t amount); | |
73 | void *buf_prepend(struct buffer *buf, size_t amount); | |
74 | void *buf_unappend(struct buffer *buf, size_t amount); /* may give 0 */ | |
75 | void *buf_unprepend(struct buffer *buf, size_t amount); /* may give 0 */ | |
76 | ||
77 | void sysfail(const char *msg); | |
78 | void fail(const char *msg); | |
79 | void sysdiag(const char *msg); | |
80 | void diag(const char *msg); | |
81 | ||
f9e59051 | 82 | extern const char *const *argv; |
83 | ||
1fb3cba0 | 84 | time_t now(void); |
85 | void *xmalloc(size_t sz); | |
86 | void get_random(void *ptr, size_t sz); | |
87 | void random_key(void *ptr, size_t sz); | |
f9e59051 | 88 | void write_must(int fd, const void *p_in, int sz, const char *what); |
89 | void read_must(int fd, void *p_in, int sz, const char *what); | |
1fb3cba0 | 90 | |
91 | void arg_assert_fail(const char *msg); | |
92 | #define arg_assert(v) (v ? (void)0 : arg_assert_fail(#v)) | |
93 | ||
94 | #define XMALLOC(variable) ((variable)= xmalloc(sizeof(*(variable)))) | |
95 | ||
96 | #define BUF_UNSOMEEND(var,buf,sz,whichend) \ | |
97 | do { var= whichend(buf,sz); if (!var) return "message truncated"; } while(0) | |
98 | #define BUF_UNAPPEND(var,buf,sz) BUF_UNSOMEEND(var,buf,sz,buf_unappend) | |
99 | #define BUF_UNPREPEND(var,buf,sz) BUF_UNSOMEEND(var,buf,sz,buf_unprepend) | |
100 | ||
101 | #define STANDARD_MECHANISMLIST(mechstring,filename) \ | |
102 | const struct mechanism mechlist_##filename []= { \ | |
103 | STANDARD_MECHANISM(mechstring,filename) \ | |
104 | { 0 } \ | |
105 | }; | |
106 | ||
107 | #define STANDARD_MECHANISM(mechstring,mechname) \ | |
108 | { mechstring, mes_##mechname, mds_##mechname, menc_##mechname, mdec_##mechname }, | |
109 | ||
110 | #endif |