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
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
|
/* strongSwan charon launcher
* Copyright (C) 2001-2002 Mathieu Lafon - Arkoon Network Security
* Copyright (C) 2006 Martin Willi - Hochschule fuer Technik Rapperswil
*
* Ported from invokepluto.c to fit charons needs.
*
* 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. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* 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.
*
* RCSID $Id: invokecharon.c 4243 2008-08-01 10:35:59Z andreas $
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <signal.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <freeswan.h>
#include "../pluto/constants.h"
#include "../pluto/defs.h"
#include "../pluto/log.h"
#include "confread.h"
#include "invokecharon.h"
#include "files.h"
static int _charon_pid = 0;
static int _stop_requested;
pid_t
starter_charon_pid(void)
{
return _charon_pid;
}
void
starter_charon_sigchild(pid_t pid)
{
if (pid == _charon_pid)
{
_charon_pid = 0;
if (!_stop_requested)
{
plog("charon has died -- restart scheduled (%dsec)"
, CHARON_RESTART_DELAY);
alarm(CHARON_RESTART_DELAY); // restart in 5 sec
}
unlink(CHARON_PID_FILE);
}
}
int
starter_stop_charon (void)
{
int i;
pid_t pid = _charon_pid;
if (pid)
{
_stop_requested = 1;
/* be more and more aggressive */
for (i = 0; i < 50 && (pid = _charon_pid) != 0; i++)
{
if (i == 0)
{
kill(pid, SIGINT);
}
else if (i < 40)
{
kill(pid, SIGTERM);
}
else if (i == 40)
{
kill(pid, SIGKILL);
plog("starter_stop_charon(): charon does not respond, sending KILL");
}
else
{
kill(pid, SIGKILL);
}
usleep(200000); /* sleep for 200 ms */
}
if (_charon_pid == 0)
{
plog("charon stopped after %d ms", 200*i);
return 0;
}
plog("starter_stop_charon(): can't stop charon !!!");
return -1;
}
else
{
plog("stater_stop_charon(): charon was not started...");
}
return -1;
}
int
starter_start_charon (starter_config_t *cfg, bool no_fork)
{
struct stat stb;
int pid, i;
char buffer[BUF_LEN];
int argc = 1;
char *arg[] = {
CHARON_CMD, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
};
if (!no_fork)
{
arg[argc++] = "--use-syslog";
}
{ /* parse debug string */
char *pos, *level, *buf_pos, type[4];
pos = cfg->setup.charondebug;
buf_pos = buffer;
while (pos && sscanf(pos, "%4s %d,", type, &level) == 2)
{
snprintf(buf_pos, buffer + sizeof(buffer) - buf_pos, "--debug-%s", type);
arg[argc++] = buf_pos;
buf_pos += strlen(buf_pos) + 1;
if (buf_pos >= buffer + sizeof(buffer))
{
break;
}
snprintf(buf_pos, buffer + sizeof(buffer) - buf_pos, "%d", level);
arg[argc++] = buf_pos;
buf_pos += strlen(buf_pos) + 1;
if (buf_pos >= buffer + sizeof(buffer))
{
break;
}
/* get next */
pos = strchr(pos, ',');
if (pos)
{
pos++;
}
}
}
if (_charon_pid)
{
plog("starter_start_charon(): charon already started...");
return -1;
}
else
{
unlink(CHARON_CTL_FILE);
_stop_requested = 0;
pid = fork();
switch (pid)
{
case -1:
plog("can't fork(): %s", strerror(errno));
return -1;
case 0:
/* child */
setsid();
sigprocmask(SIG_SETMASK, 0, NULL);
/* disable glibc's malloc checker, conflicts with leak detective */
setenv("MALLOC_CHECK_", "0", 1);
execv(arg[0], arg);
plog("can't execv(%s,...): %s", arg[0], strerror(errno));
exit(1);
default:
/* father */
_charon_pid = pid;
for (i = 0; i < 500 && _charon_pid; i++)
{
/* wait for charon for a maximum of 500 x 20 ms = 10 s */
usleep(20000);
if (stat(CHARON_PID_FILE, &stb) == 0)
{
plog("charon (%d) started after %d ms", _charon_pid, 20*(i+1));
return 0;
}
}
if (_charon_pid)
{
/* If charon is started but with no ctl file, stop it */
plog("charon too long to start... - kill kill");
for (i = 0; i < 20 && (pid = _charon_pid) != 0; i++)
{
if (i == 0)
{
kill(pid, SIGINT);
}
else if (i < 10)
{
kill(pid, SIGTERM);
}
else
{
kill(pid, SIGKILL);
}
usleep(20000);
}
}
else
{
plog("charon refused to be started");
}
return -1;
}
}
return -1;
}
|
