-
Notifications
You must be signed in to change notification settings - Fork 3
/
listing2.html
executable file
·442 lines (375 loc) · 16.3 KB
/
listing2.html
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
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">
<html>
<head>
<!-- BEGIN META TAG INFO -->
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<link rel="home" href="http://developer.apple.com/">
<link rel="find" href="http://developer.apple.com/search/">
<link rel="stylesheet" type="text/css" href="../../documentation/css/adcstyle.css" title="fonts">
<script language="JavaScript" src="../../documentation/js/adc.js" type="text/javascript"></script>
<!-- END META TAG INFO -->
<!-- BEGIN TITLE -->
<title>SimpleReach - /SimpleReach.c</title>
<!-- END TITLE -->
<script language="JavaScript">
function JumpToNewPage() {
window.location=document.scpopupmenu.gotop.value;
return true;
}
</script>
</head>
<!-- BEGIN BODY OPEN -->
<body>
<!--END BODY OPEN -->
<!-- START CENTER OPEN -->
<center>
<!-- END CENTER OPEN -->
<!-- BEGIN LOGO AND SEARCH -->
<!--#include virtual="/includes/adcnavbar"-->
<!-- END LOGO AND SEARCH -->
<!-- START BREADCRUMB -->
<div id="breadcrumb">
<table width="680" border="0" cellpadding="0" cellspacing="0">
<tr>
<td scope="row"><img width="340" height="10" src="images/1dot.gif" alt=""></td>
<td><img width="340" height="10" src="images/1dot.gif" alt=""></td>
</tr>
<tr valign="middle">
<td align="left" colspan="2">
<a href="http://developer.apple.com/">ADC Home</a> > <a href="../../referencelibrary/index.html">Reference Library</a> > <a href="../../samplecode/index.html">Sample Code</a> > <a href="../../samplecode/CoreFoundation/index.html">Core Foundation</a> > <a href="../../samplecode/CoreFoundation/idxNetworking-date.html">Networking</a> > <A HREF="javascript:location.replace('index.html');">SimpleReach</A> >
</td>
</tr>
<tr>
<td colspan="2" scope="row"><img width="680" height="35" src="images/1dot.gif" alt=""></td>
</tr>
</table>
</div>
<!-- END BREADCRUMB -->
<!-- START MAIN CONTENT -->
<!-- START TITLE GRAPHIC AND INTRO-->
<table width="680" border="0" cellpadding="0" cellspacing="0">
<tr align="left" valign="top">
<td><h1><div id="pagehead">SimpleReach</div></h1></td>
</tr>
</table>
<!-- END TITLE GRAPHIC AND INTRO -->
<!-- START WIDE COLUMN -->
<table width="680" border="0" cellpadding="0" cellspacing="0">
<tr align="left" valign="top">
<td id="scdetails">
<h2>/SimpleReach.c</h2>
<form name="scpopupmenu" onSubmit="return false;" method=post>
<p><strong>View Source Code:</strong>
<select name="gotop" onChange="JumpToNewPage();" style="width:340px"><option selected value="ingnore">Select File</option>
<option value="listing1.html">/Read Me About SimpleReach.txt</option>
<option value="listing2.html">/SimpleReach.c</option></select>
</p>
</form>
<p><strong><a href="SimpleReach.zip">Download Sample</a></strong> (“SimpleReach.zip”, 20.7K)<BR>
<strong><a href="SimpleReach.dmg">Download Sample</a></strong> (“SimpleReach.dmg”, 79.0K)</p>
<!--
<p><strong><a href="#">Download Sample</a></strong> (“filename.sit”, 500K)</p>
-->
</td>
</tr>
<tr>
<td scope="row"><img width="680" height="10" src="images/1dot.gif" alt=""><br>
<img height="1" width="680" src="images/1dot_919699.gif" alt=""><br>
<img width="680" height="20" src="images/1dot.gif" alt=""></td>
</tr>
<tr>
<td scope="row">
<!--googleon: index -->
<pre class="sourcecodebox">/*
File: SimpleReach.c
Contains: Demonstrates the System Configuration framework reachability APIs.
Written by: DTS
Copyright: Copyright (c) 2004 by Apple Computer, Inc., All Rights Reserved.
Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Computer, Inc.
("Apple") in consideration of your agreement to the following terms, and your
use, installation, modification or redistribution of this Apple software
constitutes acceptance of these terms. If you do not agree with these terms,
please do not use, install, modify or redistribute this Apple software.
In consideration of your agreement to abide by the following terms, and subject
to these terms, Apple grants you a personal, non-exclusive license, under Apple's
copyrights in this original Apple software (the "Apple Software"), to use,
reproduce, modify and redistribute the Apple Software, with or without
modifications, in source and/or binary forms; provided that if you redistribute
the Apple Software in its entirety and without modifications, you must retain
this notice and the following text and disclaimers in all such redistributions of
the Apple Software. Neither the name, trademarks, service marks or logos of
Apple Computer, Inc. may be used to endorse or promote products derived from the
Apple Software without specific prior written permission from Apple. Except as
expressly stated in this notice, no other rights or licenses, express or implied,
are granted by Apple herein, including but not limited to any patent rights that
may be infringed by your derivative works or by other works in which the Apple
Software may be incorporated.
The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO
WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN
COMBINATION WITH YOUR PRODUCTS.
IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION
OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT, TORT
(INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN
ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Change History (most recent first):
$Log: SimpleReach.c,v $
Revision 1.2 2004/05/24 21:43:09
Added comments explain why I have cleanup code even though it's not entirely necessary.
Revision 1.1 2004/04/28 15:44:36
First checked in.
*/
#include <assert.h>
#include <errno.h>
#include <CoreFoundation/CoreFoundation.h>
#include <SystemConfiguration/SystemConfiguration.h>
static void CleanupTarget(SCNetworkReachabilityRef thisTarget)
// Disposes of thisTarget.
{
assert(thisTarget != NULL);
// Ignore the result from SCNetworkReachabilityUnscheduleFromRunLoop.
// It basically tells us whether thisTarget was successfully removed
// from the runloop. It will be false if we never added thisTarget
// to the runloop, which is a definite possibility under error
// conditions.
(void) SCNetworkReachabilityUnscheduleFromRunLoop(
thisTarget,
CFRunLoopGetCurrent(),
kCFRunLoopDefaultMode
);
CFRelease(thisTarget);
}
static void PrintHeader(void)
// Prints an explanation of the flag coding.
{
fprintf(stdout, "t = kSCNetworkFlagsTransientConnection\n");
fprintf(stdout, "r = kSCNetworkFlagsReachable\n");
fprintf(stdout, "c = kSCNetworkFlagsConnectionRequired\n");
fprintf(stdout, "C = kSCNetworkFlagsConnectionAutomatic\n");
fprintf(stdout, "i = kSCNetworkFlagsInterventionRequired\n");
fprintf(stdout, "l = kSCNetworkFlagsIsLocalAddress\n");
fprintf(stdout, "d = kSCNetworkFlagsIsDirect\n");
fprintf(stdout, "\n");
}
static void PrintReachabilityFlags(
const char * hostname,
SCNetworkConnectionFlags flags,
const char * comment
)
// Prints a line that records a reachability transition.
// This includes the current time, the new state of the
// reachability flags (from the flags parameter), and the
// name of the host (from the hostname parameter).
{
time_t now;
struct tm nowLocal;
char nowLocalStr[30];
assert(hostname != NULL);
if (comment == NULL) {
comment = "";
}
(void) time(&now);
(void) localtime_r(&now, &nowLocal);
(void) strftime(nowLocalStr, sizeof(nowLocalStr), "%X", &nowLocal);
fprintf(stdout, "%s %c%c%c%c%c%c%c %s%s\n",
nowLocalStr,
(flags & kSCNetworkFlagsTransientConnection) ? 't' : '-',
(flags & kSCNetworkFlagsReachable) ? 'r' : '-',
(flags & kSCNetworkFlagsConnectionRequired) ? 'c' : '-',
(flags & kSCNetworkFlagsConnectionAutomatic) ? 'C' : '-',
(flags & kSCNetworkFlagsInterventionRequired) ? 'i' : '-',
(flags & kSCNetworkFlagsIsLocalAddress) ? 'l' : '-',
(flags & kSCNetworkFlagsIsDirect) ? 'd' : '-',
hostname,
comment
);
}
static void MyReachabilityCallback(
SCNetworkReachabilityRef target,
SCNetworkConnectionFlags flags,
void * info
)
// This routine is a System Configuration framework callback that
// indicates that the reachability of a given host has changed.
// It's call from the runloop. target is the host whose reachability
// has changed, the flags indicate the new reachability status, and
// info is the context parameter that we passed in when we registered
// the callback. In this case, info is a pointer to the host name.
//
// Our response to this notification is simply to print a line
// recording the transition.
{
assert(target != NULL);
assert(info != NULL);
PrintReachabilityFlags( (const char *) info, flags, NULL );
}
int main (int argc, const char * argv[])
// This program treats each of its arguments as a network host
// name. It monitors the reachability of each host, printing
// out a record of each change of reachability.
{
int err;
int argIndex;
SCNetworkReachabilityRef * targets;
Boolean ok;
targets = NULL;
// If we're run with no arguments, just print the usage.
err = 0;
if (argc == 1) {
const char *programName;
programName = strrchr(argv[0], '/');
if (programName == NULL) {
programName = argv[0];
} else {
programName += 1;
}
fprintf(stderr, "Usage: %s hostname...\n", programName);
err = ECANCELED;
}
// We allocate an array to hold all of the SCNetworkReachabilityRefs
// that we create. The 0'th slot of this array is never used, but
// wasting that trivial amount of memory makes the code easier.
if (err == 0) {
targets = malloc(argc * sizeof(*targets));
if (targets == NULL) {
err = ENOMEM;
}
}
// Create a SCNetworkReachabilityRef for each argument.
if (err == 0) {
PrintHeader();
fprintf(stdout, "Hit ^C to exit.\n");
fflush(stdout);
for (argIndex = 1; argIndex < argc; argIndex++) {
SCNetworkReachabilityRef thisTarget;
SCNetworkReachabilityContext thisContext;
thisContext.version = 0;
thisContext.info = (void *) argv[argIndex];
thisContext.retain = NULL;
thisContext.release = NULL;
thisContext.copyDescription = NULL;
// Create the target with the name taken from the command
// line arguments.
thisTarget = SCNetworkReachabilityCreateWithName(
NULL,
argv[argIndex]
);
if (thisTarget == NULL) {
err = SCError();
}
// Set our callback and install on the runloop.
if (err == 0) {
ok = SCNetworkReachabilitySetCallback(
thisTarget,
MyReachabilityCallback,
&thisContext
);
if ( ! ok ) {
err = SCError();
}
}
if (err == 0) {
ok = SCNetworkReachabilityScheduleWithRunLoop(
thisTarget,
CFRunLoopGetCurrent(),
kCFRunLoopDefaultMode
);
if ( ! ok ) {
err = SCError();
}
}
if (err == 0) {
SCNetworkConnectionFlags flags;
ok = SCNetworkReachabilityGetFlags(thisTarget, &flags);
if ( ok ) {
PrintReachabilityFlags(
argv[argIndex],
flags,
" (from main)"
);
} else {
err = SCError();
}
}
// Record the reference in the targets array, or clean it
// up and bail.
if (err == 0) {
targets[argIndex] = thisTarget;
} else {
if (thisTarget != NULL) {
CleanupTarget(thisTarget);
}
break;
}
}
}
// If everything went well, run our runloop to handle asynchronous
// notification of reachability changes.
if (err == noErr) {
CFRunLoopRun();
}
// Clean up.
// The current implementation never gets to this point in the success
// case because the way we terminate the program is with ^C (SIGINT),
// which just quits the program. Alas, there's no easy way to
// integrate signal handling into a CFRunLoop <rdar://problem/3635076>.
// However, I wanted to leave the termination code around, just to show
// how to do it properly.
if (targets != NULL) {
int i;
for (i = 1; i < argIndex; i++) {
assert(targets[i] != NULL);
CleanupTarget(targets[i]);
}
free(targets);
}
if (err == 0) {
return EXIT_SUCCESS;
} else {
if (err != ECANCELED) {
fprintf(stderr, "Failed with error %d\n.", err);
}
return EXIT_FAILURE;
}
}
</pre>
<!--googleoff: index -->
</td>
</tr>
</table>
<!-- END WIDE COLUMN -->
<!-- END MAIN CONTENT -->
<table width="680" border="0" cellpadding="0" cellspacing="0">
<tr>
<td><div style="width: 100%; height: 1px; background-color: #919699; margin-top: 5px; margin-bottom: 15px"></div></td>
</tr>
<tr>
<td align="center"><br/>
<table border="0" cellpadding="0" cellspacing="0" class="graybox">
<tr>
<th>Did this document help you?</th>
</tr>
<tr>
<td>
<div style="margin-bottom: 8px"><a href="http://developer.apple.com/feedback/?v=1&url=/samplecode/SimpleReach/listing2.html%3Fid%3DDTS10003238-1.0&media=dvd" target=_new>Yes</a>: Tell us what works for you.</div>
<div style="margin-bottom: 8px"><a href="http://developer.apple.com/feedback/?v=2&url=/samplecode/SimpleReach/listing2.html%3Fid%3DDTS10003238-1.0&media=dvd" target=_new>It’s good, but:</a> Report typos, inaccuracies, and so forth.</div>
<div><a href="http://developer.apple.com/feedback/?v=3&url=/samplecode/SimpleReach/listing2.html%3Fid%3DDTS10003238-1.0&media=dvd" target=_new>It wasn’t helpful</a>: Tell us what would have helped.</div>
</td>
</tr>
</table>
</td>
</tr>
</table>
<!-- START BOTTOM APPLE NAVIGATION -->
<!--#include virtual="/includes/footer"-->
<!-- END BOTTOM APPLE NAVIGATION -->
<!-- START CENTER CLOSE -->
</center>
<!-- END CENTER CLOSE -->
</body>
</html>