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
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
/* SPDX-License-Identifier: GPL-3.0-or-later */
#include <stdio.h>
#include <getopt.h>
#include <stdlib.h>
#include <signal.h>
#include <errno.h>
#include <string.h>
#include <gnutls/gnutls.h>
#include "tls-proxy.h"
static char default_local_addr[] = "127.0.0.1";
static char default_upstream_addr[] = "127.0.0.1";
static char default_cert_path[] = "../certs/tt.cert.pem";
static char default_key_path[] = "../certs/tt.key.pem";
void help(char *argv[], struct args *a)
{
printf("Usage: %s [parameters] [rundir]\n", argv[0]);
printf("\nParameters:\n"
" -l, --local=[addr] Server address to bind to (default: %s).\n"
" -p, --lport=[port] Server port to bind to (default: %u).\n"
" -u, --upstream=[addr] Upstream address (default: %s).\n"
" -d, --uport=[port] Upstream port (default: %u).\n"
" -t, --cert=[path] Path to certificate file (default: %s).\n"
" -k, --key=[path] Path to key file (default: %s).\n"
" -c, --close=[N] Close connection to client after\n"
" every N ms (default: %" PRIu64 ").\n"
" -f, --fail=[N] Delay every Nth incoming connection by 10 sec,\n"
" 0 disables delaying (default: 0).\n"
" -r, --rehandshake Do TLS rehandshake after every 8 bytes\n"
" sent to the client (default: no).\n"
" -a, --acceptonly Accept incoming connections, but don't\n"
" connect to upstream (default: no).\n"
" -v, --tls13 Force use of TLSv1.3. If not turned on,\n"
" TLSv1.2 will be used (default: no).\n"
,
a->local_addr, a->local_port,
a->upstream, a->upstream_port,
a->cert_file, a->key_file,
a->close_timeout);
}
void init_args(struct args *a)
{
a->local_addr = default_local_addr;
a->local_port = 54000;
a->upstream = default_upstream_addr;
a->upstream_port = 53000;
a->cert_file = default_cert_path;
a->key_file = default_key_path;
a->rehandshake = false;
a->accept_only = false;
a->tls_13 = false;
a->close_connection = false;
a->close_timeout = 1000;
a->max_conn_sequence = 0; /* disabled */
}
int main(int argc, char **argv)
{
long int li_value = 0;
int c = 0, li = 0;
struct option opts[] = {
{"local", required_argument, 0, 'l'},
{"lport", required_argument, 0, 'p'},
{"upstream", required_argument, 0, 'u'},
{"uport", required_argument, 0, 'd'},
{"cert", required_argument, 0, 't'},
{"key", required_argument, 0, 'k'},
{"close", required_argument, 0, 'c'},
{"fail", required_argument, 0, 'f'},
{"rehandshake", no_argument, 0, 'r'},
{"acceptonly", no_argument, 0, 'a'},
#if GNUTLS_VERSION_NUMBER >= 0x030604
{"tls13", no_argument, 0, 'v'},
#endif
{0, 0, 0, 0}
};
struct args args;
init_args(&args);
while ((c = getopt_long(argc, argv, "l:p:u:d:t:k:c:f:rav", opts, &li)) != -1) {
switch (c)
{
case 'l':
args.local_addr = optarg;
break;
case 'u':
args.upstream = optarg;
break;
case 't':
args.cert_file = optarg;
break;
case 'k':
args.key_file = optarg;
break;
case 'p':
li_value = strtol(optarg, NULL, 10);
if (li_value <= 0 || li_value > UINT16_MAX) {
printf("error: '-p' requires a positive"
" number less or equal to 65535, not '%s'\n", optarg);
return -1;
}
args.local_port = (uint16_t)li_value;
break;
case 'd':
li_value = strtol(optarg, NULL, 10);
if (li_value <= 0 || li_value > UINT16_MAX) {
printf("error: '-d' requires a positive"
" number less or equal to 65535, not '%s'\n", optarg);
return -1;
}
args.upstream_port = (uint16_t)li_value;
break;
case 'c':
li_value = strtol(optarg, NULL, 10);
if (li_value <= 0) {
printf("[system] error '-c' requires a positive"
" number, not '%s'\n", optarg);
return -1;
}
args.close_connection = true;
args.close_timeout = li_value;
break;
case 'f':
li_value = strtol(optarg, NULL, 10);
if (li_value <= 0 || li_value > UINT32_MAX) {
printf("error: '-f' requires a positive"
" number less or equal to %i, not '%s'\n",
UINT32_MAX, optarg);
return -1;
}
args.max_conn_sequence = (uint32_t)li_value;
break;
case 'r':
args.rehandshake = true;
break;
case 'a':
args.accept_only = true;
break;
case 'v':
#if GNUTLS_VERSION_NUMBER >= 0x030604
args.tls_13 = true;
#endif
break;
default:
init_args(&args);
help(argv, &args);
return -1;
}
}
if (signal(SIGPIPE, SIG_IGN) == SIG_ERR) {
fprintf(stderr, "failed to set up SIGPIPE handler to ignore(%s)\n",
strerror(errno));
}
struct tls_proxy_ctx *proxy = tls_proxy_allocate();
if (!proxy) {
fprintf(stderr, "can't allocate tls_proxy structure\n");
return 1;
}
int res = tls_proxy_init(proxy, &args);
if (res) {
fprintf(stderr, "can't initialize tls_proxy structure\n");
return res;
}
res = tls_proxy_start_listen(proxy);
if (res) {
fprintf(stderr, "error starting listen, error code: %i\n", res);
return res;
}
fprintf(stdout, "Listen on %s#%u\n"
"Upstream is expected on %s#%u\n"
"Certificate file %s\n"
"Key file %s\n"
"Rehandshake %s\n"
"Close %s\n"
"Refuse incoming connections every %ith%s\n"
"Only accept, don't forward %s\n"
"Force TLSv1.3 %s\n"
,
args.local_addr, args.local_port,
args.upstream, args.upstream_port,
args.cert_file, args.key_file,
args.rehandshake ? "yes" : "no",
args.close_connection ? "yes" : "no",
args.max_conn_sequence, args.max_conn_sequence ? "" : " (disabled)",
args.accept_only ? "yes" : "no",
#if GNUTLS_VERSION_NUMBER >= 0x030604
args.tls_13 ? "yes" : "no"
#else
"Not supported"
#endif
);
res = tls_proxy_run(proxy);
tls_proxy_free(proxy);
return res;
}
|
