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
|
/* $OpenBSD: isakmpd.c,v 1.2 1998/11/15 00:43:57 niklas Exp $ */
/*
* Copyright (c) 1998 Niklas Hallqvist. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Ericsson Radio Systems.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* This code was written under funding by Ericsson Radio Systems.
*/
#include <sys/param.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "app.h"
#include "conf.h"
#include "init.h"
#include "log.h"
#include "sysdep.h"
#include "timer.h"
#include "transport.h"
#include "udp.h"
#include "ui.h"
extern char *optarg;
extern int optind;
/*
* Set if -d is given, currently just for running in the foreground and log
* to stderr instead of syslog.
*/
int debug = 0;
/*
* Use -r seed to initalize random numbers to a deterministic sequence.
*/
extern int regrand;
/*
* If we receive a SIGHUP signal, this flag gets set to show we need to
* reconfigure ASAP.
*/
static int sighupped = 0;
static void
usage ()
{
fprintf (stderr,
"usage: %s [-d] [-c config-file] [-D class=level] [-f fifo] [-n]\n"
" [-p listen-port] [-P local-port] [-r seed]\n",
sysdep_progname ());
exit (1);
}
static void
parse_args (int argc, char *argv[])
{
int ch, cls, level;
while ((ch = getopt (argc, argv, "c:dD:f:np:P:r:")) != -1) {
switch (ch) {
case 'c':
conf_path = optarg;
break;
case 'd':
debug++;
break;
case 'D':
if (sscanf (optarg, "%d=%d", &cls, &level) != 2)
log_print ("parse_args: -D argument unparseable: %s", optarg);
else
log_debug_cmd (cls, level);
break;
case 'f':
ui_fifo = optarg;
break;
case 'n':
app_none++;
break;
case 'p':
udp_default_port = atoi (optarg);
break;
case 'P':
udp_bind_port = atoi (optarg);
break;
case 'r':
srandom (strtoul (optarg, NULL, 0));
regrand = 1;
break;
case '?':
default:
usage ();
}
}
argc -= optind;
argv += optind;
}
/* Reinitialize after a SIGHUP reception. */
static void
reinit (void)
{
/* Reread config file. */
conf_init ();
/* XXX Rescan interfaces. */
sighupped = 0;
}
static void
sighup (int sig)
{
sighupped = 1;
}
int
main (int argc, char *argv[])
{
fd_set rfds, wfds;
int n, m;
struct timeval tv, *timeout = &tv;
parse_args (argc, argv);
init ();
if (!debug)
{
if (daemon (0, 0))
log_fatal ("daemon");
/* Switch to syslog. */
log_to (0);
}
/* Reinitialize on HUP reception. */
signal (SIGHUP, sighup);
while (1)
{
/* If someone has sent SIGHUP to us, reconfigure. */
if (sighupped)
reinit ();
/* Setup the descriptors to look for incoming messages at. */
FD_ZERO (&rfds);
n = transport_fd_set (&rfds);
FD_SET (ui_socket, &rfds);
if (ui_socket + 1 > n)
n = ui_socket + 1;
/*
* XXX Some day we might want to deal with an abstract application
* class instead, with many instantiations possible.
*/
if (!app_none)
{
FD_SET (app_socket, &rfds);
if (app_socket + 1 > n)
n = app_socket + 1;
}
/* Setup the descriptors that have pending messages to send. */
FD_ZERO (&wfds);
m = transport_pending_wfd_set (&wfds);
if (m > n)
n = m;
/* Find out when the next timed event is. */
timer_next_event (&timeout);
n = select (n, &rfds, &wfds, 0, timeout);
if (n == -1)
{
log_error ("select");
/*
* In order to give the unexpected error condition time to resolve
* without letting this process eat up all available CPU we sleep
* for a short while.
*/
sleep (1);
}
else if (n)
{
transport_handle_messages (&rfds);
transport_send_messages (&wfds);
if (FD_ISSET (ui_socket, &rfds))
ui_handler ();
if (!app_none && FD_ISSET (app_socket, &rfds))
app_handler ();
}
timer_handle_expirations ();
}
}
|
