This file is indexed.

/usr/share/gtk-doc/html/gnet/gnet-udp.html is in libgnet-dev 2.0.8-2.1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  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
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>UDP</title>
<meta name="generator" content="DocBook XSL Stylesheets V1.72.0">
<link rel="start" href="index.html" title="GNet Network Library Reference Manual">
<link rel="up" href="libgnet-reference.html" title="GNet Library Reference">
<link rel="prev" href="gnet-tcp.html" title="TCP">
<link rel="next" href="gnet-mcast.html" title="Mcast">
<meta name="generator" content="GTK-Doc V1.8 (XML mode)">
<link rel="stylesheet" href="style.css" type="text/css">
<link rel="chapter" href="gnet-overview.html" title="GNet Overview">
<link rel="chapter" href="gnet-developers.html" title="GNet for developers">
<link rel="chapter" href="gnet-examples.html" title="GNet Examples">
<link rel="chapter" href="libgnet-reference.html" title="GNet Library Reference">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="2">
<tr valign="middle">
<td><a accesskey="p" href="gnet-tcp.html"><img src="left.png" width="24" height="24" border="0" alt="Prev"></a></td>
<td><a accesskey="u" href="libgnet-reference.html"><img src="up.png" width="24" height="24" border="0" alt="Up"></a></td>
<td><a accesskey="h" href="index.html"><img src="home.png" width="24" height="24" border="0" alt="Home"></a></td>
<th width="100%" align="center">GNet Network Library Reference Manual</th>
<td><a accesskey="n" href="gnet-mcast.html"><img src="right.png" width="24" height="24" border="0" alt="Next"></a></td>
</tr>
<tr><td colspan="5" class="shortcuts"><nobr><a href="#id350294" class="shortcut">Top</a>
                  &#160;|&#160;
                  <a href="#id350992" class="shortcut">Description</a></nobr></td></tr>
</table>
<div class="refentry" lang="en">
<a name="gnet-udp"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2>
<a name="id350294"></a><span class="refentrytitle">UDP</span>
</h2>
<p>UDP &#8212; UDP socket</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<h2>Synopsis</h2>
<pre class="synopsis">

#include &lt;gnet.h&gt;


                    <a href="gnet-udp.html#GUdpSocket">GUdpSocket</a>;
<a href="gnet-udp.html#GUdpSocket">GUdpSocket</a>*         <a href="gnet-udp.html#gnet-udp-socket-new">gnet_udp_socket_new</a>                 (void);
<a href="gnet-udp.html#GUdpSocket">GUdpSocket</a>*         <a href="gnet-udp.html#gnet-udp-socket-new-with-port">gnet_udp_socket_new_with_port</a>       (gint port);
<a href="gnet-udp.html#GUdpSocket">GUdpSocket</a>*         <a href="gnet-udp.html#gnet-udp-socket-new-full">gnet_udp_socket_new_full</a>            (const <a href="gnet-inetaddr.html#GInetAddr">GInetAddr</a> *iface,
                                                         gint port);
void                <a href="gnet-udp.html#gnet-udp-socket-delete">gnet_udp_socket_delete</a>              (<a href="gnet-udp.html#GUdpSocket">GUdpSocket</a> *socket);
void                <a href="gnet-udp.html#gnet-udp-socket-ref">gnet_udp_socket_ref</a>                 (<a href="gnet-udp.html#GUdpSocket">GUdpSocket</a> *socket);
void                <a href="gnet-udp.html#gnet-udp-socket-unref">gnet_udp_socket_unref</a>               (<a href="gnet-udp.html#GUdpSocket">GUdpSocket</a> *socket);
gint                <a href="gnet-udp.html#gnet-udp-socket-send">gnet_udp_socket_send</a>                (<a href="gnet-udp.html#GUdpSocket">GUdpSocket</a> *socket,
                                                         const gchar *buffer,
                                                         gint length,
                                                         const <a href="gnet-inetaddr.html#GInetAddr">GInetAddr</a> *dst);
gint                <a href="gnet-udp.html#gnet-udp-socket-receive">gnet_udp_socket_receive</a>             (<a href="gnet-udp.html#GUdpSocket">GUdpSocket</a> *socket,
                                                         gchar *buffer,
                                                         gint length,
                                                         <a href="gnet-inetaddr.html#GInetAddr">GInetAddr</a> **src);
gboolean            <a href="gnet-udp.html#gnet-udp-socket-has-packet">gnet_udp_socket_has_packet</a>          (const <a href="gnet-udp.html#GUdpSocket">GUdpSocket</a> *socket);
GIOChannel*         <a href="gnet-udp.html#gnet-udp-socket-get-io-channel">gnet_udp_socket_get_io_channel</a>      (<a href="gnet-udp.html#GUdpSocket">GUdpSocket</a> *socket);
<a href="gnet-inetaddr.html#GInetAddr">GInetAddr</a>*          <a href="gnet-udp.html#gnet-udp-socket-get-local-inetaddr">gnet_udp_socket_get_local_inetaddr</a>  (const <a href="gnet-udp.html#GUdpSocket">GUdpSocket</a> *socket);
gint                <a href="gnet-udp.html#gnet-udp-socket-get-ttl">gnet_udp_socket_get_ttl</a>             (const <a href="gnet-udp.html#GUdpSocket">GUdpSocket</a> *socket);
gint                <a href="gnet-udp.html#gnet-udp-socket-set-ttl">gnet_udp_socket_set_ttl</a>             (<a href="gnet-udp.html#GUdpSocket">GUdpSocket</a> *socket,
                                                         gint ttl);
</pre>
</div>
<div class="refsect1" lang="en">
<a name="id350992"></a><h2>Description</h2>
<p>
This module provides support for UDP sockets.  UDP is an internet
protocol that transfers packets by best-effort delivery.  Packets may
be lost or arrive out-of-order.  Use TCP if your protocol requires
data transfered reliably and in-order -- most do.
</p>
<p>
A UDP socket is represented by a <a href="gnet-udp.html#GUdpSocket"><span class="type">GUdpSocket</span></a> structure.  To create a
<a href="gnet-udp.html#GUdpSocket"><span class="type">GUdpSocket</span></a>, call <a href="gnet-udp.html#gnet-udp-socket-new"><code class="function">gnet_udp_socket_new()</code></a>,
<a href="gnet-udp.html#gnet-udp-socket-new-with-port"><code class="function">gnet_udp_socket_new_with_port()</code></a>, or <a href="gnet-udp.html#gnet-udp-socket-new-full"><code class="function">gnet_udp_socket_new_full()</code></a>.
</p>
<p>
To send a packet, call <a href="gnet-udp.html#gnet-udp-socket-send"><code class="function">gnet_udp_socket_send()</code></a>.  To receive a packet,
call <a href="gnet-udp.html#gnet-udp-socket-receive"><code class="function">gnet_udp_socket_receive()</code></a>.  <a href="gnet-udp.html#gnet-udp-socket-send"><code class="function">gnet_udp_socket_send()</code></a> will block if
the OS cannot buffer the packet immediately.
<a href="gnet-udp.html#gnet-udp-socket-receive"><code class="function">gnet_udp_socket_receive()</code></a> will block until there is a packet available
to receive.  Call <a href="gnet-udp.html#gnet-udp-socket-has-packet"><code class="function">gnet_udp_socket_has_packet()</code></a> to determine whether a
packet is available immediately.  A more elegant method is to get the
<span class="type">GIOChannel</span> and add a read watch.  A callback will be called when a
packet is available.  Note that a UDP socket's <span class="type">GIOChannel</span> is not a
normal <span class="type">GIOChannel</span> -- it should not be written to or read from
directly.
</p>
<p>
Packets have a time-to-live (TTL) field.  This field is decremented
before a router forwards the packet.  If the TTL reaches zero, the
packet is dropped.  The TTL can be set by calling
<a href="gnet-udp.html#gnet-udp-socket-get-ttl"><code class="function">gnet_udp_socket_get_ttl()</code></a>.  The default value is sufficient for most
applications.
</p>
</div>
<div class="refsect1" lang="en">
<a name="id351158"></a><h2>Details</h2>
<div class="refsect2" lang="en">
<a name="id351168"></a><h3>
<a name="GUdpSocket"></a>GUdpSocket</h3>
<a class="indexterm" name="id351180"></a><pre class="programlisting">typedef struct _GUdpSocket GUdpSocket;</pre>
<p>
A <a href="gnet-udp.html#GUdpSocket"><span class="type">GUdpSocket</span></a> structure represents a UDP socket.  The
 implementation is hidden.</p>
<p>

</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id351207"></a><h3>
<a name="gnet-udp-socket-new"></a>gnet_udp_socket_new ()</h3>
<a class="indexterm" name="id351219"></a><pre class="programlisting"><a href="gnet-udp.html#GUdpSocket">GUdpSocket</a>*         gnet_udp_socket_new                 (void);</pre>
<p>
Creates a <a href="gnet-udp.html#GUdpSocket"><span class="type">GUdpSocket</span></a> bound to all interfaces and an arbitrary
 port.</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></td>
<td> a new <a href="gnet-udp.html#GUdpSocket"><span class="type">GUdpSocket</span></a>; NULL on error.

</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id351274"></a><h3>
<a name="gnet-udp-socket-new-with-port"></a>gnet_udp_socket_new_with_port ()</h3>
<a class="indexterm" name="id351287"></a><pre class="programlisting"><a href="gnet-udp.html#GUdpSocket">GUdpSocket</a>*         gnet_udp_socket_new_with_port       (gint port);</pre>
<p>
Creates a <a href="gnet-udp.html#GUdpSocket"><span class="type">GUdpSocket</span></a> bound to all interfaces and port <em class="parameter"><code>port</code></em>.  If
 <em class="parameter"><code>port</code></em> is 0, an arbitrary port will be used.</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>port</code></em>&#160;:</span></td>
<td> port to bind to (0 for an arbitrary port)
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></td>
<td> a new <a href="gnet-udp.html#GUdpSocket"><span class="type">GUdpSocket</span></a>; NULL on error.

</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id351375"></a><h3>
<a name="gnet-udp-socket-new-full"></a>gnet_udp_socket_new_full ()</h3>
<a class="indexterm" name="id351387"></a><pre class="programlisting"><a href="gnet-udp.html#GUdpSocket">GUdpSocket</a>*         gnet_udp_socket_new_full            (const <a href="gnet-inetaddr.html#GInetAddr">GInetAddr</a> *iface,
                                                         gint port);</pre>
<p>
Creates a <a href="gnet-udp.html#GUdpSocket"><span class="type">GUdpSocket</span></a> bound to interface <em class="parameter"><code>iface</code></em> and port <em class="parameter"><code>port</code></em>.
 If <em class="parameter"><code>iface</code></em> is NULL, all interfaces will be used.  If <em class="parameter"><code>port</code></em> is 0, an
 arbitrary port will be used.</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>iface</code></em>&#160;:</span></td>
<td> interface to bind to (NULL for all interfaces)
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>port</code></em>&#160;:</span></td>
<td> port to bind to (0 for an arbitrary port)
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></td>
<td> a new <a href="gnet-udp.html#GUdpSocket"><span class="type">GUdpSocket</span></a>; NULL on error.

</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id351509"></a><h3>
<a name="gnet-udp-socket-delete"></a>gnet_udp_socket_delete ()</h3>
<a class="indexterm" name="id351522"></a><pre class="programlisting">void                gnet_udp_socket_delete              (<a href="gnet-udp.html#GUdpSocket">GUdpSocket</a> *socket);</pre>
<p>
Deletes a <a href="gnet-udp.html#GUdpSocket"><span class="type">GUdpSocket</span></a>. Does nothing if <em class="parameter"><code>socket</code></em> is NULL.</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><span class="term"><em class="parameter"><code>socket</code></em>&#160;:</span></td>
<td> a <a href="gnet-udp.html#GUdpSocket"><span class="type">GUdpSocket</span></a>, or NULL
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id351592"></a><h3>
<a name="gnet-udp-socket-ref"></a>gnet_udp_socket_ref ()</h3>
<a class="indexterm" name="id351604"></a><pre class="programlisting">void                gnet_udp_socket_ref                 (<a href="gnet-udp.html#GUdpSocket">GUdpSocket</a> *socket);</pre>
<p>
Adds a reference to a <a href="gnet-udp.html#GUdpSocket"><span class="type">GUdpSocket</span></a>.</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><span class="term"><em class="parameter"><code>socket</code></em>&#160;:</span></td>
<td> <a href="gnet-udp.html#GUdpSocket"><span class="type">GUdpSocket</span></a> to reference
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id351669"></a><h3>
<a name="gnet-udp-socket-unref"></a>gnet_udp_socket_unref ()</h3>
<a class="indexterm" name="id351682"></a><pre class="programlisting">void                gnet_udp_socket_unref               (<a href="gnet-udp.html#GUdpSocket">GUdpSocket</a> *socket);</pre>
<p>
Removes a reference from a <span class="type">GUdpScoket</span>.  A <a href="gnet-udp.html#GUdpSocket"><span class="type">GUdpSocket</span></a> is deleted
 when the reference count reaches 0.</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><span class="term"><em class="parameter"><code>socket</code></em>&#160;:</span></td>
<td> a <a href="gnet-udp.html#GUdpSocket"><span class="type">GUdpSocket</span></a>
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id351756"></a><h3>
<a name="gnet-udp-socket-send"></a>gnet_udp_socket_send ()</h3>
<a class="indexterm" name="id351768"></a><pre class="programlisting">gint                gnet_udp_socket_send                (<a href="gnet-udp.html#GUdpSocket">GUdpSocket</a> *socket,
                                                         const gchar *buffer,
                                                         gint length,
                                                         const <a href="gnet-inetaddr.html#GInetAddr">GInetAddr</a> *dst);</pre>
<p>
Sends data to a host using a <a href="gnet-udp.html#GUdpSocket"><span class="type">GUdpSocket</span></a>.</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>socket</code></em>&#160;:</span></td>
<td> a <a href="gnet-udp.html#GUdpSocket"><span class="type">GUdpSocket</span></a>
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>buffer</code></em>&#160;:</span></td>
<td> buffer to send
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>length</code></em>&#160;:</span></td>
<td> length of <em class="parameter"><code>buffer</code></em>
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>dst</code></em>&#160;:</span></td>
<td> destination address
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></td>
<td> 0 if successful; something else on error.

</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id351912"></a><h3>
<a name="gnet-udp-socket-receive"></a>gnet_udp_socket_receive ()</h3>
<a class="indexterm" name="id351924"></a><pre class="programlisting">gint                gnet_udp_socket_receive             (<a href="gnet-udp.html#GUdpSocket">GUdpSocket</a> *socket,
                                                         gchar *buffer,
                                                         gint length,
                                                         <a href="gnet-inetaddr.html#GInetAddr">GInetAddr</a> **src);</pre>
<p>
Receives data using a <a href="gnet-udp.html#GUdpSocket"><span class="type">GUdpSocket</span></a>.  If <em class="parameter"><code>src</code></em> is set, the source
 address is stored in the location <em class="parameter"><code>src</code></em> points to.  The address is
 caller owned.</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>socket</code></em>&#160;:</span></td>
<td> a <a href="gnet-udp.html#GUdpSocket"><span class="type">GUdpSocket</span></a>
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>buffer</code></em>&#160;:</span></td>
<td> buffer to write to
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>length</code></em>&#160;:</span></td>
<td> length of <em class="parameter"><code>buffer</code></em>
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>src</code></em>&#160;:</span></td>
<td> pointer to source address (optional)
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></td>
<td> the number of bytes received, -1 on error.

</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id352081"></a><h3>
<a name="gnet-udp-socket-has-packet"></a>gnet_udp_socket_has_packet ()</h3>
<a class="indexterm" name="id352093"></a><pre class="programlisting">gboolean            gnet_udp_socket_has_packet          (const <a href="gnet-udp.html#GUdpSocket">GUdpSocket</a> *socket);</pre>
<p>
Tests if a <a href="gnet-udp.html#GUdpSocket"><span class="type">GUdpSocket</span></a> has a packet waiting to be received.</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>socket</code></em>&#160;:</span></td>
<td> a <a href="gnet-udp.html#GUdpSocket"><span class="type">GUdpSocket</span></a>
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></td>
<td> TRUE if there is packet waiting, FALSE otherwise.

</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id352169"></a><h3>
<a name="gnet-udp-socket-get-io-channel"></a>gnet_udp_socket_get_io_channel ()</h3>
<a class="indexterm" name="id352182"></a><pre class="programlisting">GIOChannel*         gnet_udp_socket_get_io_channel      (<a href="gnet-udp.html#GUdpSocket">GUdpSocket</a> *socket);</pre>
<p>
Gets the <span class="type">GIOChannel</span> of a <a href="gnet-udp.html#GUdpSocket"><span class="type">GUdpSocket</span></a>.
</p>
<p>
 Use the channel with <code class="function">g_io_add_watch()</code> to check if the socket is
 readable or writable.  If the channel is readable, call
 <a href="gnet-udp.html#gnet-udp-socket-receive"><code class="function">gnet_udp_socket_receive()</code></a> to receive a packet.  If the channel is
 writable, call <a href="gnet-udp.html#gnet-udp-socket-send"><code class="function">gnet_udp_socket_send()</code></a> to send a packet.  This is
 not a normal giochannel - do not read from or write to it.
</p>
<p>
 Every <a href="gnet-udp.html#GUdpSocket"><span class="type">GUdpSocket</span></a> has one and only one <span class="type">GIOChannel</span>.  If you ref
 the channel, then you must unref it eventually.  Do not close the
 channel.  The channel is closed by GNet when the socket is
 deleted.
</p>
<p>
 Before deleting the UDP socket, make sure to remove any watches you have
 added with <code class="function">g_io_add_watch()</code> again with <code class="function">g_source_remove()</code> using the integer
 id returned by <code class="function">g_io_add_watch()</code>. You may find your program stuck in a busy
 loop at 100% CPU utilisation if you forget to do this.</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>socket</code></em>&#160;:</span></td>
<td> a <a href="gnet-udp.html#GUdpSocket"><span class="type">GUdpSocket</span></a>
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></td>
<td> a <span class="type">GIOChannel</span>.

</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id352365"></a><h3>
<a name="gnet-udp-socket-get-local-inetaddr"></a>gnet_udp_socket_get_local_inetaddr ()</h3>
<a class="indexterm" name="id352378"></a><pre class="programlisting"><a href="gnet-inetaddr.html#GInetAddr">GInetAddr</a>*          gnet_udp_socket_get_local_inetaddr  (const <a href="gnet-udp.html#GUdpSocket">GUdpSocket</a> *socket);</pre>
<p>
Gets the local host's address from a <a href="gnet-udp.html#GUdpSocket"><span class="type">GUdpSocket</span></a>.</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>socket</code></em>&#160;:</span></td>
<td> a <a href="gnet-udp.html#GUdpSocket"><span class="type">GUdpSocket</span></a>
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></td>
<td> a <a href="gnet-inetaddr.html#GInetAddr"><span class="type">GInetAddr</span></a>.

</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id352461"></a><h3>
<a name="gnet-udp-socket-get-ttl"></a>gnet_udp_socket_get_ttl ()</h3>
<a class="indexterm" name="id352473"></a><pre class="programlisting">gint                gnet_udp_socket_get_ttl             (const <a href="gnet-udp.html#GUdpSocket">GUdpSocket</a> *socket);</pre>
<p>
Gets the time-to-live (TTL) default of a <a href="gnet-udp.html#GUdpSocket"><span class="type">GUdpSocket</span></a>.  All UDP
 packets have a TTL field.  This field is decremented by a router
 before it forwards the packet.  If the TTL reaches zero, the
 packet is discarded.  The default value is sufficient for most
 applications.</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>socket</code></em>&#160;:</span></td>
<td> a <a href="gnet-udp.html#GUdpSocket"><span class="type">GUdpSocket</span></a>
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></td>
<td> the TTL (an integer between 0 and 255), -1 if the kernel
 default is being used, or an integer less than -1 on error.

</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id352551"></a><h3>
<a name="gnet-udp-socket-set-ttl"></a>gnet_udp_socket_set_ttl ()</h3>
<a class="indexterm" name="id352563"></a><pre class="programlisting">gint                gnet_udp_socket_set_ttl             (<a href="gnet-udp.html#GUdpSocket">GUdpSocket</a> *socket,
                                                         gint ttl);</pre>
<p>
Sets the time-to-live (TTL) default of a <a href="gnet-udp.html#GUdpSocket"><span class="type">GUdpSocket</span></a>.  Set the TTL
 to -1 to use the kernel default.  The default value is sufficient
 for most applications.</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>socket</code></em>&#160;:</span></td>
<td> a <a href="gnet-udp.html#GUdpSocket"><span class="type">GUdpSocket</span></a>
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>ttl</code></em>&#160;:</span></td>
<td> value to set TTL to
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></td>
<td> 0 if successful.

</td>
</tr>
</tbody>
</table></div>
</div>
</div>
</div>
</body>
</html>