2 * Encrypting tunnel for userv-ipif tunnels, header file
5 * Copyright (C) 2000 Ian Jackson
7 * This is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with userv-utils; if not, write to the Free Software
19 * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
27 #include <sys/utsname.h>
39 typedef void mes_functype(struct mechdata **md_r, int *maxprefix_io, int *maxsuffix_io);
40 typedef void mds_functype(struct mechdata **md_r);
42 typedef void menc_functype(struct mechdata *md, struct buffer*);
43 typedef const char *mdec_functype(struct mechdata *md, struct buffer*);
47 mes_functype *encsetup;
48 mds_functype *decsetup;
49 menc_functype *encode;
50 mdec_functype *decode;
53 extern const struct mechanism *const mechanismlists[];
55 /* setup function may call getarg_xxx functions and then
56 * reads/writes key material to/from fd
58 * setup_in function may increase maxprefix and maxsuffix
59 * code functions modify buffer in place
60 * decode function returns 0 meaning packet decoded ok,
61 * "" meaning discard it quietly, or message to print for verbose discard
64 const char *getarg_string(void);
65 unsigned long getarg_ulong(void);
67 #define PROGRAM "udptunnel-forwarder"
68 extern char programid[];
70 void *buf_append(struct buffer *buf, size_t amount);
71 void *buf_prepend(struct buffer *buf, size_t amount);
72 void *buf_unappend(struct buffer *buf, size_t amount); /* may give 0 */
73 void *buf_unprepend(struct buffer *buf, size_t amount); /* may give 0 */
75 void sysfail(const char *msg);
76 void fail(const char *msg);
77 void sysdiag(const char *msg);
78 void diag(const char *msg);
80 extern const char *const *argv;
83 void *xmalloc(size_t sz);
84 void get_random(void *ptr, size_t sz);
85 void random_key(void *ptr, size_t sz);
86 void write_must(int fd, const void *p_in, int sz, const char *what);
87 void read_must(int fd, void *p_in, int sz, const char *what);
89 void arg_assert_fail(const char *msg);
90 #define arg_assert(v) (v ? (void)0 : arg_assert_fail(#v))
92 #define XMALLOC(variable) ((variable)= xmalloc(sizeof(*(variable))))
94 #define BUF_UNSOMEEND(var,buf,sz,whichend) \
95 do { var= whichend(buf,sz); if (!var) return "message truncated"; } while(0)
96 #define BUF_UNAPPEND(var,buf,sz) BUF_UNSOMEEND(var,buf,sz,buf_unappend)
97 #define BUF_UNPREPEND(var,buf,sz) BUF_UNSOMEEND(var,buf,sz,buf_unprepend)
99 #define STANDARD_MECHANISMLIST(mechstring,filename) \
100 const struct mechanism mechlist_##filename []= { \
101 STANDARD_MECHANISM(mechstring,filename) \
105 #define STANDARD_MECHANISM(mechstring,mechname) \
106 { mechstring, mes_##mechname, mds_##mechname, menc_##mechname, mdec_##mechname },